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HomeMy WebLinkAbout02/14/17 PC AgendaPLANNING FILE QOPY COMMISSION AGENDA February 14, 2017 7:00 P.M. City Hall, Windmill Community Room 21810 Copley Drive Diamond Bar, CA 91765 Chairperson Commissioner Commissioner Commissioner Jennifer "Fred" Mahlk' Raymond Wolfe Naila Barlas Frank Farago Ken Mok I Copies of staff reports or other written documentation relating to agenda items are on file in the Planning Division of the Community Development Department, located at 21810 Copley Drive, and are available for public inspection. If you have questions regarding an agenda item, please call (909) 839-7030 during regular business hours. Written materials distributed to the Planning Commission within 72 hours of the Planning Commission meeting are available for public inspection immediately upon distribution in the City Clerk's office at 21810 Copley Drive, Diamond Bar, California, during normal business hours. In an effort to comply with the requirements of Title I/ of the Americans with Disabilities Act of 1990, the City of Diamond Bar requires that any person in need of any type of special equipment, assistance or accommodation(s) in order to communicate at a City public meeting must inform the Community Development Department at (909) 839-7030 a minimum of 72 hours prior to the scheduled meeting. `DIMIOND " ti Please refrain from smoking, eating or The City of Diamond Bar uses recycled drinking in the Windmill Community Room paper and encourages you to do the same City nfDiamond Ba[ Planning Commission PUBLIC INPUT The meetings Ofthe Diamond Bar Planning Commission are open tDthe public. Amember Ofthe public may address the Commission ODthe subject 0fone O[more agenda items and/or other items Ofwhich are within the subject matter jurisdiction Of the Diamond BR[ P|8DOiOg Commission. A FBqU8St to address the COnDDliSSiVO should be submitted in writing at the public hea[iDg, to the Secretary of the CODlDliSSi0D. AS @ general [U|8. the opportunity for public CO008Ots will take place at the discretion of the Chair. Hovvever, in order to facilitate the nleeting, persons who are interested parties for an item may be requested tOgive their presentation @tthe time the item iGcalled on the calendar. The Chair may limit individual public input to five rDiDUteG on any item; or the Chair may limit the total aD0VUOt Of time allocated for public testimony based on the number of people requesting to speak and the business of the Commission. Individuals are requested tOconduct themselves iO8 professional and businesslike manner. Comments and questions are VVe|DDDle So that all points of view are cOOSid8n3d prior to the CVDlDl)gsioO making recommendations tVthe staff and City Council. |Daccordance with State Law (Brown Act)`all matters to be acted ODbythe Commission must beposted at least 72 hours prior to the CVOlDlisSiOO meeting. In C888 of emergency or when @ SUbi8Ct matter arises subsequent tOthe posting of the agenda, upon making certain findings, the Commission may act oDitem that isnot onthe posted agenda. INFORMATION RELATING TO AGENDAS AND ACTIONS OF THE COMMISSION Agendas for Diamond Bar Planning Commission meetings are prepared by the Planning Division of the Community Development Department. Agendas are available 72hours prior tothe meeting atCity Hall and the public library, and may be accessed bypersonal computer 8tthe contact information below. Every meeting of the P|8nDiDQ COOlDliS3iOD is recorded and duplicate [eCOPdiDgS are available for @ nominal charge. ADA REQUIREMENTS A cordless microphone is available for those persons with mobility impairments who cannot access the public speaking area. The service of the cordless microphone and sign language interpreter services are available by giving notice at least three business days in advance of the meeting. Please telephone (909) 839-7030 between 7:308.Dl. and 5:30 p.m., Monday through Thursday, and 7:30@.00. and 4:30 p.m., Friday. HELPFUL CONTACT INFORMATION Copies of Agenda, F{U|eS of the CODlDli8SiOD. CDB Of Meetings (SOS) 839-7030 Email: CITY OF DIAMOND BAR PLANNING COMMISSION Tuesday, February 14, 2017 CALL TO ORDER: 7:00 p.m. PLEDGE OF ALLEGIANCE: ill P 3. 0 Next Resolution No. 2017-03 ROLL CALL: COMMISSIONERS: Naila Barlas, Frank Farago, Ken Mok, Vice Chairperson Raymond Wolfe, Chairperson Jennifer "Fred" Mahlke MATTERS FROM THE AUDIENCE/PUBLIC COMMENTS: This is the time and place for the general public to address the members of the Planning Commission on any item that is within their jurisdiction, allowing the public an opportunity to speak on non-public hearing and non -agenda items. Please complete a Speaker's Card for the recording Secretary (completion of this form is voluntary). There is a five-minute maximum time limit when addressing the Planning Commission. APPROVAL OF AGENDA: Chairperson CONSENT CALENDAR: The following items listed on the consent calendar are considered routine and are approved by a single motion. Consent calendar items may be removed from the agenda by request of the Commission only: 4.1 Minutes of Regular Meeting: 1 5. OLD BUSINESS: None 6. NEW BUSINESS: None 7. PUBLIC HEARING(S): January 10, 2017 7.1 Tentative Parcel Map No. PL2016-01 — The applicant is requesting City approval to subdivide an existing 183,203 square -foot (4.2 gross acre) property into three residential lots. The subject property is currently developed with a single-family residence and accessory structure. The proposed subdivision will result in the existing development occupying one of the lots, and the creation of two vacant parcels to accommodate the future construction of single-family homes. The property is zoned Rural Residential (RR), and the underlying General Plan land use designation is also named Rural Residential. FEBRUARY 14, 2017 PAGE 2 PLANNING COMMISSION 91 a Project Address: 22702 Timbertop Lane Diamond Bar, CA 91765 Property Owner: USA Rongchen Development Inc. 21614 Fairwind Lane Diamond Bar, CA 91765 Applicant: Tritech Engineering Associates 135 N. San Gabriel Blvd. San Gabriel, CA 91775 Environmental Determination: Pursuant to the provisions of the California Environmental Quality Act (CEQA), Section 15070, the City prepared an Initial Study and Mitigated Negative Declaration for this project. Pursuant to CEQA Section 15105, the public review period for the Mitigated Negative Declaration began January 25, 2017, and ends February 13, 2017. Recommendation: Staff recommends that the Planning Commission recommend approval of Tentative Parcel Map No. PL2016-01 to the City Council. PLANNING COMMISSION COMMENTS / INFORMATIONAL ITEMS: STAFF COMMENTS / INFORMATIONAL ITEMS: 9.1 Public Hearing dates for future projects 10. SCHEDULE OF FUTURE EVENTS: TRAFFIC AND TRANSPORTATION COMMISSION MEETING: PRESIDENT'S DAY: CITY COUNCIL MEETING: Thursday, February 9, 2017, 7:00 pm Diamond Bar City Hall Windmill Community Room 21810 Copley Drive Monday, February 20, 2017 In observance of the holiday, City offices will be closed. City offices will re -open on Tuesday, February 21, 2017 Tuesday, February 21, 2017 — 6:30 pm South Coast Air Quality Management District Auditorium, 21825 Copley Drive FEBRUARY 14, 2017 PAGE 3 PLANNING COMMISSION PARK AND RECREATION Tuesday, February 23, 7:00 pm COMMISSION MEETING: Diamond Bar City Hall Windmill Community Room 21810 Copley Drive PLANNING COMMISSION Tuesday, February 28, 2017, 7:00 pm MEETING: Diamond Bar City Hall Windmill Community Room 21810 Copley Drive MINUTES OF THE CITY OF DIAMOND BAR '7 7 MEETING OF THE PLANNING COMMISSION JANUARY 10, 2017 Chair/Mahlke called the meeting to order at 7:00 p.m. in the AQMD/Government Center Auditorium, 21825 Copley Drive, Diamond Bar, CA 91765. PLEDGE OF ALLEGIANCE: C/Mok led the Pledge of Allegiance. a 2. 3. �, I iTSIXIMM" Present: Commissioners Naila Barlas, Frank Farago, Ken Mok, Vice Chair Raymond Wolfe and Chair Jennifer "Fred" Mahlke Also present: Greg Gubman, Community Development Director; James Eggart, Assistant City Attorney; Grace Lee, Senior Planner; Natalie T. Espinoza, Assistant Planner; and, Stella Marquez, Administrative Coordinator. MATTERS FROM THE AUDIENCE/PUBLIC COMMENTS: None APPROVAL OF AGENDA: As presented CONSENT CALENDAR: 4.1 Minutes of the Regular Meeting of November 8, 2016: VC/Wolfe moved, C/Barlas seconded to approve the Minutes of the Regular Meeting of November 8, 2016, as corrected by C/Mok. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS NOES: COMMISSIONERS ABSENT: COMMISSIONERS 5. OLD BUSINESS: None NEW BUSINESS: 6.1 General Plan Status Report for 2016 Barlas, Farago, Mok, VC/Wolfe Chair/Mahlke None None SP/Lee presented staff's report and asked for Planning Commission approval and recommendation that the report be forwarded to the City Council to Receive and File. State law requires cities to submit an annual report to the local legislative bodies, the State Governor's Office of Planning and Research JANUARY 10, 2017 PAGE 2 i PLANNING COMMISSION and the State Department of Housing and Community Department. The report lists the City's progress toward the implementation of the General Plan as well as, meeting the regional housing needs for the community in the calendar year. SP/Lee highlighted some of the City's efforts beginning with Land Use. The City issued nine construction permits for new single family residences and 41 permits for additions to existing homes. Lennar Homes started construction of model homes for the South Pointe Project which consists of 99 for -sale detached homes. The opening of this project is anticipated for the spring of 2017. This level of construction activity is an indicator of the continued desirability of Diamond Bar as a place to live, and the desire of individuals to remain in the City by adapting their homes to meet the needs of their families. With respect to Commercial, the former Von's/Haggen Supermarket opened as a Smart & Final Extra in March 2016; the multi -tenant out pad building in the Target Center consisting of Starbucks, T -Mobile and Jimmy John's Restaurant opened in the fall; the former Walnut Pool building is currently under construction for an exterior facelift, parking lot reconfiguration and enhanced landscaping; and, the former Kmart site is being renovated with exterior and interior upgrades to the existing building and will include construction of new shops space and renovation of the parking with new surfacing, landscaping and lighting. Sprouts, Ross, Chipotle, and Coffee Bean/Tea Leaf have signed tenant leases to occupy the Kmart Center and the Center is being rebranded as "Diamond Bar Ranch." The City continues to work with property owners of the former Honda site to attract a hotel anchored development project and, the property owners of the Brea Canyon Road RV storage property to develop their site with a hotel as an anchor. Regarding Recreational, Diamond Canyon Park adjacent to the Willow Heights Community opened in December 2016 and Lennar Homes is currently under construction of Larkstone Park, a 6.8 gross acre neighborhood park adjacent to the South Pointe residential development which is anticipated to be completed in the spring of 2017. With respect to the Health and Safety Element, the City instituted new Public Safety and Emergency Preparedness meetings called "Let's Talk Public Safety" which is geared to educating and informing residents about emergency preparedness, fire safety and crime prevention. These meetings are a collaboration between the City, Sheriff's Department, and the LA County Fire Department. The City continues to collaborate with the City of Industry for implementation of the SR57/60 Confluence Project, a $256 million multi - phased improvement project to the existing SR57/60 Freeway Interchange. There are four phases in the project: 1) Construction of the westbound onramp JANUARY 10, 2017 PAGE 3 PLANNING COMMISSION from Grand Avenue which is currently under construction with completion targeted in December 2017; 2) Construction of the westbound SR60 off ramp and auxiliary lane to Grand Avenue which is currently under construction with completion expected by summer 2018; 3) Construction of the street widening improvements in the vicinity of the Grand Avenue and Golden Springs Drive intersection with design currently underway; and 4) Freeway Mainline Improvements and Bypass Connectors. Staff is currently working with Metro to restart the design engineering work in order to begin construction by late 2020. The Lemon Avenue Interchange Project is expected to result in the closure of the SR60 Brea Canyon Road eastbound access ramps and create new onramp and off ramps at Lemon Avenue. Construction began in September 2016 with completion targeted for March 2018. The City was awarded $1.4 million from Metro's competitive grant program for the development and implementation of an Adaptive Traffic Control System and full implementation is anticipated for spring 2018. The City also continues to annually implement the guidelines of the LA Congestion Management Program which is required to maintain eligibility for Regional Transportation Funding Opportunities. In the fall, the City embarked on the multi-year process of updating the City's General Plan that will create community visions and the blueprint for growth and development in the City through 2040. The City engaged the community through the following means: Developed a project website where community members can stay up-to-date on the project; a kickoff meeting with the City Council and the Planning Commission was held; the first General Plan Advisory Committee (GPAC) meeting was held; stakeholder interviews were conducted with local developers, commercial property owners, service organizations, major employers, and active members in the community; the first Community Visioning Workshop ,was held; three popup booths were placed at various locations and events; and, surveys were distributed at various community events and posted online. The City continues to pursue economic development to increase City revenue, address traffic related issues, preserve Open Space and continue to create a community environment that nurtures social, cultural, religious, educational and recreational opportunities for all residents. VC/Wolfe commented on the SR57/60 Confluence project that the organization he represents in his day job is partnering with LA Metro on a Freight Formula Grant Application with USDOT that hopefully will fill a big part of this gap. He said he believes there are 482 municipalities in California and cities are required to submit this update to the California State Office of Planning and Research and asked if Diamond Bar had, in the past, ever JANUARY 10, 2017 PAGE 4 PLA AING COMMISSION received comments back from that office. SP/Lee said she has been submitting this report for the past six years and has yet to receive any comments. Chair/Mahlke moved, C/Mok seconded, to approve the General Plan Status Report for 2016 and forward the report to the City Council to Receive and File. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Barlas, Farago, Mok, VC/Wolfe Chair/Mahlke NOES: COMMISSIONERS: None ABSENT: COMMISSIONERS: None 7. PUBLIC HEARING(S): 7.1 Development Review No. PL2014-659 — Under the authority of Diamond Bar Municipal Code Section 22.48, the applicant and property owners requested Development Review approval to construct an 8,871 square foot single family residence with 956 square feet of garage area and 2,249 square feet of patio/deck/balcony area on a 1.20 gross acre (52,018 gross square foot) lot. The subject property is zoned Rural Residential (RR) with an underlying General Plan land use designation of Rural Residential. PROJECT ADDRESS AT 2718 Steeplechase Lane Diamond Bar, CA 91765 Joy Living Investments, Inc. 19639 Highland Terrace Drive Walnut, CA 91789 Dario Zuniga 1202 Larimore Avenue La Puente, CA 91744 AP/Espinoza presented staff's report and recommended Planning Commission approval of Development Review PI -2014-659, based on the Findings of Fact, and subject to the conditions of approval as listed within the resolution. Chair/Mahlke opened the public hearing. Kathy, representing the owner, said that the owner told her he received a letter from a neighbor complaining about road damage. The owner promised he JANUARY 10, 2017 PAGE 5 PLANNING COMMISSION would do the repair and after the project is finished he will do the repair again to make everything look like new. C/Mok asked the speaker if the owner said he would repair the road to match the road to the left and right or just repair it by putting in new asphalt and slurry seal. Kathy said the owner just told her he would repair the damage now and after the project is finished he will rebuild the street. VC/Wolfe said it is not the responsibility of the City and/or the Planning Commission with respect to the private road. Chair/Mahlke closed the public hearing. VC/Wolfe moved, C/Barlas seconded, to approve Development Review No. PI -2014-659, based on the Findings of Fact, and subject to the conditions of approval as listed within the resolution. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Barlas, Farago, Mok, VC/Wolfe Chair/Mahlke NOES: COMMISSIONERS: None ABSENT: COMMISSIONERS: None 7.2 Development Review and Tree Permit No. PL2016-129 — Under the authority of Diamond Bar Municipal Code Sections 22.48 and 22.38, the applicant and property owner requested Development Review approval to construct a 12,786 square foot single family residence with 1,852 square feet of garage area and, 7,658 square feet of patio/deck/balcony area on a 1.33 gross acre (57,935 gross square feet) lot. A Tree Permit was requested to remove three black walnut trees and replace them at a three to one (3:1) ratio. The subject property is zoned Rural Residential (RR) with an underlying General Plan land use designation of Rural Residential. PROJECT ADDRESS: 23540 Mirage Lane Diamond Bar, CA 91765 Huang Rong Tian 13571 Benson Avenue Chino, CA 91710 APPLICANT: Simon Shum 383 S. Lemon Avenue #E-383 Walnut, CA 91789 1K -PLANNING JANUARY 10, 2017 PAGE 6 g�) 1�-PLANNING COMMISSION AP/Espinoza presented staff's report and recommended Planning Commission approval of Development Review No. PI -2016-129, based on the Findings of Fact, and subject to the conditions of approval as listed within the resolution. Chair/Mahlke said that staff's report indicated a total of 30 trees, three of which are still alive and need to be removed; however, the Arborist's report says there are three trees that need to be removed along with an additional 30 trees for a total of 33 trees that need to be removed. AP/Espinoza said it was a typo. Previous versions of the Arborist reports indicated a total of 33 trees onsite and the Arborist's report should read a total of 30 trees, 27 of which are dead and three that are surviving. AP/Espinoza said that staff would request a corrected report. Chair/Mahlke opened the public hearing. Simon Shum, Architect for the project stated the previously submitted plans on two separate occasions. Because of the budget and other constraints, the new owner is trying to move forward with a similar design that has been updated to meet the new requirements/guidelines. Chair/Mahlke closed the public hearing. C/Farago moved, C/Mok seconded, to approve Development Review No. PI -2016-129, based on the Findings of Fact, and subject to the conditions of approval as listed within the resolution. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Barlas, Farago, Mok, VC/Wolfe Chair/Mahlke NOES: COMMISSIONERS: None ABSENT: COMMISSIONERS: None Chair/Mahlke congratulated the applicant on a beautiful design. 8. PLANNING COMMISSIONER COMMENTS/INFORMATIONAL ITEMS: C/Mok wished everyone a Happy New Year and said he looks forward to working with his colleagues and staff on wonderful new projects in 2017. C/Farago asked for an update on the lot on Diamond Bar Boulevard adjacent to the carwash. CDD/Gubman responded that the soil remediation has been completed. JANUARY 10, 2017 PAGE 7 --P),-AXINING COMMISSION The discovery of the contamination is what stalled and ultimately killed the Amerca's Tire project. At this time, staff is unaware of any new tenant showing interest in the site. C/Barlas wished everyone a Happy New Year. VC/Wolfe said that with respect to Item 2, when one looks at the front cover, knowing that the rotunda is on left it is difficult to see because the roof tile indicates that it is a flat surface. VC/Wolfe said he was looking forward to General Plan updates as the City proceeds through that effort this year and he will be very interested to see how much participation the City can garner from the community. It is an opportunity and often, community members do not participate at all in city government. This is an opportunity to help define the future of the community and he hopes for significant community input in the process. Chair/Mahlke wished everyone a Happy New Year and said she is glad to be back at work on the Commission. She hopes that the New Year is treating everyone well and that it is starting off in the right direction for everyone. 9. STAFF COMMENTS/INFORMATIONAL ITEMS: 9.1 Public Hearing dates for future projects. CDD/Gubman wished everyone a Happy New Year. The next scheduled Planning Commission meeting date is January 24 and that meeting will be canceled so tonight's meeting will be adjourned to February 14. Next week the second GPAC meeting will take place in the Windmill Room on Thursday, January 19 at 7:00 p.m. The main topic of discussion at that meeting will be to discuss the findings of the Existing Conditions Report that has been prepared as one of the baseline documents to start building the new General Plan document. The report looks at the existing economic and fiscal conditions and potential opportunities and constraints, evaluation of the City's infrastructure, its circulation system, public services and all of the factors that need to be planned for the next generation. This will be a good starting point to see what is feasible as the visioning process begins for what the new General Plan document will shape up to be. CDD/Gubman reported that a November 9 community workshop had a very good turnout of about 80 to 85 residents who were very engaged in the discussion and exercises. Participants worked in groups and presented their ideas for what they would like the City to be in 2040. One of the exercises was to create a magazine cover dated 2040 that celebrated Diamond Bar's progress over the past 20 years. Residents enthusiastically participated and JANUARY 10, 2017 PAGE 8 PLANNING COMMISSION staff has been getting good survey response. It is staff's hope that this momentum will generate some additional involvement and input as the process moves forward. CDD/Gubman spoke about the Planning Commissioners Academy which will be held in Los Angeles March 1 through 3 and thanks to all who have indicated their interest in participating and are now registered to attend. It should be an interesting roster of sessions which he plans to attend as well and will help Commissioners choose what sessions might be most helpful to them. He looks forward to discussing what is presented at the workshops and help translate "Plannery" to English for the Commissioners. There has been no physical activity on the Kmart project site. However, the developer is moving forward and leases have been signed. A contractor is on board and is preparing to mobilize a construction team to start the demolition work. One of the tenants was going to be Petco. SP/Lee mentioned Sprouts, Ross, Coffee Bean and Tea Leaf and Chipotle. Unfortunately, it appears that Petco will not be a tenant at this point. However, the property owner has other interested businesses that are willing to come in which may lead to another out -parcel building on the side of the driveway across from Chipotle and Coffee Bean are located. As a result, staff may be coming to the Planning Commission with a somewhat scaled down shell building where Petco was going to be located and a new building for a couple of additional tenants. For those who have not heard, after 27 years with Diamond Bar and 40 years in public service, CM/DeStefano is retiring and his target date for leaving is in July. The City Council held a Special Meeting on December 19 to talk about the transition and the recruitment process which will commence in the next couple of weeks with announcing the position and follow through with interviews and vetting. The plan is to have the appointment finalized in May to allow for a smoother transition prior to CM/DeStefano's departure. C/Mok asked if the Commissioners were supposed to commute each day to the Planning Commissioners Academy or stay at the airport for the three days. CDD/Gubman said it was up to the Commissioners. Only the registration for all three days will be paid by the City. 10. SCHEDULE OF FUTURE EVENTS: As noted in the agenda. JANUARY 10, 2017 PAGE 9 :=`PLANNING COMMISSION ADJOURNMENT: With no further business before the Planning Commission, Chair/Mahlke adjourned the regular meeting at 7:45 p.m. to February 14, 2017. The foregoing minutes are hereby approved this 14th day of February, 2017. Attest: Respectfully Submitted, Greg Gubman Community Development Director Jennifer Mahlke, Chairperson Ulltell CITY OF DIAMOND BAR - 21810 COPLEY DRIVE - DIAMOND BAR, CA 91765 - TEL. (909) 839-7030 - FAX (909) 861-3117 AGENDA ITEM NUMBER: 7.1 MEETING DATE: February 14, 2017 CASE/FILE NUMBER: Tentative Parcel Map No. 72035 (Planning Case No. PL 2016-01) PROJECT LOCATION: 22702 Timbertop Lane, Diamond Bar, CA 91765 (Assessor's Parcel No. 8713-028-012) PROPERTY OWNERS: USA Rongchen Development, Inc. 21614 Fairwind Lane Diamond Bar, CA 91765 APPLICANT: Tritech Associates, Inc. 135 N. San Gabriel Blvd. San Gabriel, CA 91775 The applicant is requesting City approval to subdivide an existing 183,203 square -foot (4.2 gross acre) property into three residential lots. The subject property is currently developed with a single-family residence and accessory structure. The proposed subdivision will result in the existing development occupying one of the lots, and the creation of two vacant parcels to accommodate the future construction of single-family homes. The property is zoned Rural Residential (RR), and the underlying General Plan land use designation is also named Rural Residential. After evaluating the application, staff finds that the proposed Tentative Parcel Map comp ' lies with the City's Subdivision Ordinance and that the subdivision findings required pursuant to Diamond Bar Municipal Code Section 21.20.080 can be made. Therefore, staff recommends that the Planning Commission adopt the attached resolution recommending that the City Council approve Tentative Parcel Map No. 72035, subject to the conditions of approval contained in the Resolution. The project site is located within The Diamond Bar Country Estates ("The Country"), a gated residential community served by private streets. The subject property is located on the south side of Lazy Meadow Drive, between Alamo Heights Drive and Blaze Trail, and is surrounded by single-family homes. There is also an Homeowners' Association (HOA) Recreation Facility and administrative offices. immediately to the north. The project site is 4.2 gross acres in area, and is developed with an existing single-family residence (known as the "California Bicentennial Home"), built in 1969/70 and an accessory structure. The subject property has four protected trees on-site but none are proposed for removal. The site is legally described as Lot 130 of Tract No. 30578, and the Assessor's Parcel Number (APRT) is 8713-028-012. 6m=x III,; , 11 (1� I. ExEm Tentative Parcel Map No. 72035 PL 2016-01 Page 2 of 11 Site Aerial Prolect Descrirotion The proposed three -lot subdivision would facilitate the development of single-family residences on the two newly -created vacant parcels. The gross and net size of each lot is provided in the table below. The gross and net size (after the dedication of the private street easement) of each lot is provided in the table below. 113; 1;i 2 x 0, did MKI .......... 64,297 SF (1.48 AC) - Gross 65,326 SF (1.5 AC) - Gross 1 53,580 SF (1.23 AC) - Gross 60,557 SF (1.39 AC) - Net 60,388 SF (1.39 AC) — Net '44,195 SF (1.02 AC) - Net Development Review applications for the single-family homes on Parcels 2 and 3 will be submitted for processing in the future. Tentative Parcel Map No. 72035 PL 2016-01 Page 3 of 11 01 - 4 FEE,I to ,M-1 -v .4� v., PAROL 3 GROSS: 5;3.580 SF 230 AQ Mr. 44,795 51, 615 AC) GROSS .& 7 SP !A?6 Lk. N 1:'n 6. C Si: 1,390 11. P ANALYSIS: Review Author! Tentative Parcel Map Section 21.02.040 of the City's Municipal Code requires all subdivision applications to be reviewed and approved by the City Council. Therefore, the Planning Commission will be forwarding a recommendation to the City Council for this request. Tentative Map: A tentative map is a map approving the division of land for the purpose of sale, lease, or financing, and is governed by the Subdivision Map Act. A tentative map prescribes how the land is to be subdivided. The City of Diamond Bar's Subdivision Ordinance establishes the minimum standards for the design of the lots, and the public improvements which serve them. A subdivision of four or,fewer parcels requires a parcel map, and a subdivision of five or more parcels requires a tract map. When a Planning Commission or City Council considers a tentative parcel or tract map, it must be reviewed in light of the required findings mandated by state law for approval or denial of the map. Once the tentative map is approved, the more refined final map is approved by the City Council if deemed by the City Engineer to be in substantial conformance with the Tentative Parcel Map No. 72035 PL 2016-01 Page 4 of 11 T, % PARCEL 2L 6IZ055* 65,326 SF 4COAC) NEr. 60,3885P (1,386 ACJ —T-7 -------------------------- ------- P ANALYSIS: Review Author! Tentative Parcel Map Section 21.02.040 of the City's Municipal Code requires all subdivision applications to be reviewed and approved by the City Council. Therefore, the Planning Commission will be forwarding a recommendation to the City Council for this request. Tentative Map: A tentative map is a map approving the division of land for the purpose of sale, lease, or financing, and is governed by the Subdivision Map Act. A tentative map prescribes how the land is to be subdivided. The City of Diamond Bar's Subdivision Ordinance establishes the minimum standards for the design of the lots, and the public improvements which serve them. A subdivision of four or,fewer parcels requires a parcel map, and a subdivision of five or more parcels requires a tract map. When a Planning Commission or City Council considers a tentative parcel or tract map, it must be reviewed in light of the required findings mandated by state law for approval or denial of the map. Once the tentative map is approved, the more refined final map is approved by the City Council if deemed by the City Engineer to be in substantial conformance with the Tentative Parcel Map No. 72035 PL 2016-01 Page 4 of 11 tentative map. The final map is then recorded with the Los Angeles County Recorder's Office, after which the newly -created parcels may be individually sold and developed pursuant to the underlying zoning regulations. The 'maximum allowed density for the Rural Residential General Plan land use designation and zoning district is one dwelling unit per gross acre (1 DU/AC). Because all three of. the proposed lots comprising the 4.2 -acre project site exceed one acre in size, the proposed project is in compliance.with :the City's General. Plan with regards to density. Density is further restricted by the topography of the subject property. The density reduction criteria set forth in the City's Hillside Management Ordinance results in a maximum yield of 3.36 dwelling- units for the subject property. The proposed three -lot subdivision, therefore, conforms to all density limitations applicable to the subject property. The table below compares the proposed project with the City's Subdivision and Development Code standards: R 141'— Parcel 1 Minimum 50' 290' 144'— Parcel 2 Yes 165'— Parcel 3 Average 396'— Parcel I Minimum 80'. 540' Average 378'— Parcel 2 Yes Average 303'— Parcel 3 yr Maximum 4' None — Parcel 1 (if associated with 5 feet 4'— Parcel 2 Yes building pad) 4'— Parcel 3 The City's subdivision standards require proposed building pad locations to be identified for parcels with a slope of 20 percent or greater. Because the average slope of the site is approximately 32.7 percent, the applicant provided a conceptual grading plan to demonstrate the con'structability of the proposed lots in conformance with the RR zone development standards (see the exhibits accompanying the Tentative Parcel Map in Attachment 3). As part of the subdivision review, staff sent notices to all public utility companies and service agencies regarding the proposed subdivision request. All agencies will be expected to provide service to each lot, including providers of gas, electrical, water, sewer, and cable television services. The detailed site planning, building footprints, floor plan, exterior design, landscaping and grading will be submitted for review during the Development Review application process for the development of each lot. Tentative Parcel Map No. 72035 PL 2016-01 Page 5 of 11 As set forth in the above analysis, the proposed subdivision is in conformance with the City's General Plan and zoning, and all applicable requirements of the Subdivision Map Act. The project complies with the minimum lot area and density. No variances or exceptions are requested, and all public utilities and services are available to service the project. Access and Circulation The project site is located within The Country Estates, a gated residential community served by fully improved private streets. The proposed subdivision will not interfere with the existing, access from Timbertop Lane. Parcels 2 and,3 will gain access from Lazy Meadow Drive;:-,`-Okmii ion on-site will be reviewed dUring the'Development Review application proce$$'., Compatibility With. N61ghborhodd The proposed subdivision is consistent with the City's General Plan in that it complies with the maximum density allowance of 1 dwelling unit per gross acre. The site is surrounded by single-family residential development and therefore will be compatible with 'the, surrounding uses. To ensure that the architectural and site plan design complies with the City's Development *Code and Design Guidelines, the design of the buildings and landscaping on each lot will be reviewed during the Development Review application process. Tentative Parcel Map No. 72035 PL 2016-01 Page 6 of 11 V Adjacent Property and Single -Family residence to the East on Timbertop Lane Project Site Looking South from Lazy Meadow ®rive Tentative Parcel Map No. 72035 PL 2016-01 Page 7 of 11 Pursuant to the Subdivision Ordinance, the City requires the dedication of land or payment of fees for park or recreational purposes. The land or fees are to be used only for the purpose of developing new or rehabilitating existing park or recreational facilities to serve the subdivision, and the amount and location of land to be dedicated or amount of fees paid shall bear a reasonable relationship to the use of the park and recreational facilities by the future inhabitants of the subdivision. The amount of acreage required to be dedicated by the applicant is based upon the number of dwelling units from the subdivision. The proposed subdivision will result in two additional dwelling units. The required dedicated acreage is computed using the following formula: X = .005(U P) Where X = Amount of parkland .required, in acres U = Total number of approved dwelling units in the subdivision P = 3.4 for single-family dwellings The in -lieu fee equals the parkland obligation derived from the formula above, multiplied by the fair market value of the land for the appropriate park planning area of 0.051 acres. Staff used the most recent land that the City acquired—Washington Park—to calculate the fair market value to acquire land for park space. Washington Park was purchased in October 2008 for $380,000 and is 21,530 square feet (approximately half an acre). Property values in this area has increased by approximately 23 percent since 2008. The fair market value of Washington Park is now assessed at' approximately $467,400. $934,800 (fair market value of one acre parkland) x 0.051 = $47,675.00 The in lieu fee for this project is determined to be $47,675.00 and shall be paid to the City prior to final map approval (Condition #7 under Tentative Parcel Map Conditions). It is unlikely that a parkland dedication contribution was made at the time that the existing parcel was created. If the applicant can produce evidence that such a contribution was made, then the above -calculated in -lieu fee may be reduced by one- third. Vacation of Easements On September 20, 2016, the City Council adopted a Resolution to vacate an easement for a future street and an easement for slope purposes that exists on the subject lot. The easements were dedicated to the City of Diamond Bar as successor to the County of Los Angeles on Tract Map No. 30578 in 1969. This future street easement was intended to connect Alamo Heights Drive and Blaze Trail. Lazy Meadow Drive was then Tentative Parcel Map No. 72035 PL 2016-01 Page 8 of 11 constructed approximately 100 feet north of the easements connecting Alamo Heights Drive and Blaze Trail, negating the need for the easements. There is no present and prospective public use of the portion of the easements to be vacated, and by vacating, the City.will be relieved from the responsibility of maintaining the easements. Homeowners Association On July 1, 2016, the City received a letter from The Diamond Bar Country Estates Association (DBCEA) stating that they are unable to approve the subdivision request. Although the property owner is bound by the Covenants, Conditions, and Restrictions (CC&Rs) and bylaws of The DBCEA, the City is not. The -proposed subdivision conforms fully to the City's Subdivision Ordinance and zoning regulations applicable to the site. Notwithstanding the DBCEA's opposition to the proposed subdivision, the City Council must still exercise its independent judgment, and base its decision solely on whether the required findings to approve this tentative map request can be made. rum;ma�-��,, The Public Works Department and Building and Safety Division reviewed this project and included their comments in the attached resolution as conditions of approval. Public hearing notices were mailed to property owners within a 1,000 -foot radius of the project site on February 3, 2017, and the notice was published in the Inland Valley Daily Tribune and San Gabriel Valley Tribune newspapers on February 3, 2017. The project site was posted with a notice display board, and a I copy of the public notice was posted at the City's three designated community, posting sites. U [$111 (;T71) lilt - it irza At the time the staff report was published, staff had not received any comments from the public. This project has been reviewed for compliance with the California Environmental Quality Act (CEQA). Staff prepared and filed an Initial Study/Environ mental Checklist and Notice of Intent to Adopt a Mitigated Negative Declaration for the project on January 25, 2017, with the Los Angeles County Clerk and it is part of this report (Attachment 2). Pursuant to CEQA Section 15105, the public review period for the Mitigated Negative Declaration began on January 25, 2017, and ended February 13, 2017. This project would have been exempt under Article 19, Section 15315, Class 15 (Minor Land Divisions) except that the average slope of the property is greater than 20 percent. The average slope of the property is 32.7 percent. Tentative Parcel Map No. 72035 PL 2016 -01 Page 9 of 11 The Initial Study is a preliminary analysis to determine whether or not a Negative Declaration, Mitigated Negative Declaration, or Environmental Impact Report (EIR) is needed for a project. If the Initial Study concludes that the proposed project will not significantly affect the environment or may have the potential to effect the environment but can be mitigated to a level of less. than significant, a Negative Declaration or a Mitigated Negative Declaration may be prepared, respectively. A Mitigated Negative Declaration is a written document. that briefly describes the reasons that a proposed project will not have a significant effect on the environment. It is used to guide and assist the City staff, Planning Commission, City Council, and the public in the consideration and evaluation of potential environmental impacts that may result from the proposed project's development. Once the Initial Study and Mitigated Negative Declaration are prepared, a Notice of Intent to Adopt a Mitigated Negative Declaration is posted at the Los Angeles County Clerk and published in the Inland Valley Daily Tribune and San Gabriel Valley Tribune newspapers. The public.review period must be no less than 20 days. Staff prepared the Initial Study/Environmental Checklist for the proposed project, which documents reasons to support the findings that the proposed project would not have any potentially significant impacts on the environment with the proposed mitigation measures. Cultural Resources "California Bicentennial Home" The existing lot is developed with a single-family residence also known as the "California Bicentennial Home" and an accessory structure. The "California Bicentennial Home" was evaluated for significance under criteria based on the CEQA, as amended in 2015, which includes criteria for eligibility to the California Register of Historical Resources (CRHR). According to an Architectural and Historical Significance Assessment conducted by Archaeological Associates on August 8, 2016, the analysis indicated that it was one of three showcase -homes designed and constructed for the sole purpose of promoting custom home development in the "The Country." In 1970, The Country, was a recreational -residential planned development with an equestrian theme developed by the new Transamerica Development Company. Research and analysis has indicated that the residence appears eligible for the CRHR under Criterion 2, due to association with noted Southern Californian architect RaOl Garduno. Additionally, the home appears eligible for local listing only under Criterion 3 as it is important to the City of Diamond Bar; however, there is no local historical register in the City of Diamond Bar. It does not appear eligible, either at the state level or locally, under Criteria 1 or 4. The applicant intends to preserve the "California Bicentennial Home" on site. However, in the event that demolition of the residence is desired, then a Mitigation Program designed to reduce the level of the resource's significance to a level Tentative Parcel Map No. 72035 PL 2016-01 Page 10 of 11 of insignificance shall be implemented.. This can be achieved through ugh a comprehensive recordation program known as a Historic American Building Survey (NABS) and companion document, aHistoric American Engineering Record (HAER). - The detailed requirements for the HABS/HAER can be found in Section 5 (Cultural Resources) of the Initial Study/Environmental Checklist (Attachment 2). Therefore, with the recommended mitigation measures, the project impacts on historic resources will be reduced to a level of less than significant. AB 52 requires notification/request for tribal consultation for projects subject to CEQA. A notification list was obtained from the Native American Heritage Commission and the City sent notices to the Tribes' informing them of the opportunity to request consultation. On December 1,. 2016, the City received a letter from the Gabrieleho Band of Mission Indians (Kith Nation), indicating that the project area lies in an area where the ancestral territories of the Kizh (Kitc) Gabrieleho's villages adjoined and overlapped. Due to the project location and the high sensitivity of the area location, the tribe had requested a certified Native American Monitor to be on site during any and all ground disturbances (including but not limited to pavement removal, post holing, auguring,* boring, grading, excavation and trenching) to protect any cultural resources which may be effected during construction or development. Staff has - included this as a mitigation measure (CR -2) in the Mitigation Program. 1:11;pB9011[ ►J [ f�10) IN Staff recommends that the Planning Commission adopt the attached Resolution (Attachment #1) recommending the approval of Tentative Parcel Map No. 72035 for Planning Case No. PL 2016-01 to the City Council, to allow a subdivision of an existing lot into three separate lots, based on the findings, subject to conditions of approval as listed within the draft resolution. Prepared by: Mayuko Nakajima Associate Planner Attachments: Reviewed by: G r ad. [I —ee Senior P*Ianner 1. Draft Resolution No. 2017-)0( and Conditions of Approval 2. Notice of Mitigated Negative Declaration and Initial Study/Environ mental Checklist 3. Tentative Parcel Map No. 72035 g Tentative Parcel Map No. 72035 PL 2016-01 Pae 11 of 11 PLANNING COMMISSION RESOLUTION NO. 2017 -XX A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF DIAMOND BAR, CALIFORNIA, RECOMMENDING APPROVAL OF MITIGATED NEGATIVE DECLARATION AND TENTATIVE PARCEL MAP NO. 72035 FOR THE SUBDIVISION OF AN EXISTING 4.2 ACRE LOT INTO THREE LOTS FOR THE FUTURE DEVELOPMENT OF NEW SINGLE-FAMILY RESIDENCES ON THE TWO NEWLY CREATED LOTS LOCATED AT 22702 TIMBERTOP LANE, DIAMOND BAR, CALIFORNIA (APN 8713-028-012). A. RECITALS 1. The property owner, USA Rongchen Development, Inc., and applicant, Tritech Associates, Inc., have filed an application for Tentative Parcel Map No. PL2016-01 to subdivide an existing lot into three separate lots for the development of a single-family residence on each lot located at 22702 Timbertop Lane. Hereinafter in this resolution, the subject Tentative Parcel Map shall be collectively referred to as the "Project." 2. The subject property is made up of one parcel totaling 183,203 gross square feet (4.2 acres). It is located in the Rural Residential (RR) zone with an underlying General Plan land use designation of Rural Residential. 3. The legal description of the subject property is Lot 130 of Tract No. 30578. The Assessor's Parcel Number is 8713-028-012. 4. Notification of the public hearing for this project was published in the San Gabriel Valley Tribune and the Inland Valley Daily Bulletin newspapers on February 3, 2017. Public hearing notices were mailed to property owners within a 1,000 -foot radius of the project site and public notices were posted at the City's designated community posting sites. In addition to the published and mailed notices, the project site was posted with a display board and the notice was posted at three other locations within the project vicinity; 5. On February 14, 2017, the Planning( Commission of the City of Diamond Bar conducted a duly noticed public hearing, solicited testimony from all interested individuals, and concluded said hearing on that date; and 6. The documents and materials constituting the administrative record of the proceedings upon which the City's decision is based are located at the City of Diamond Bar, Community Development Department, Planning Division, 21810 Copley Drive, Diamond Bar, CA 91765. a C. RESOLUTION NOW, THEREFORE, it is found, determined and resolved by the Planning Commission of the City of Diamond Bar as follows: The Planning Commission hereby specifically finds that all of the facts set forth in the Recitals, Part A, of this Resolution are true and correct; and 2. In accordance to the provisions of the California Environmental Quality Act (CEQA), Section 15070, the City prepared and filed an Initial Study and Notice of Intent to Adopt Mitigated Negative Declaration for the project on January 25, 2017, with the Los Angeles County Clerk. Pursuant to CEQA Section 15105, the public review period for the Mitigated Negative Declaration began January 25, 2017, and ended February 13, 2017. FINDINGS OF FACT Based on the findings and conclusions set forth herein and as prescribed under Diamond Bar Municipal Code (DBMC) Section 21.20, this Planning Commission hereby recommends that the City Council make the following findings: The Planning Commission hereby specifically finds and determines that, having considered the record as a whole including the findings set forth below, and changes and alterations which have been incorporated into and conditioned upon the proposed project set forth in the application, there is no evidence before this Planning Commission that the project proposed herein will have the potential of an adverse effect on wild life resources or the habitat upon which the wildlife depends. Based upon substantial evidence, this Planning Commission hereby rebuts the presumption of adverse effects contained in Section 753.5(d) of Title 14 of the California Code of Regulations; Tentative Map Findings: Pursuant to Subdivision Code Section 21.20.080 of the City's Subdivision Ordinance, the Planning Commission recommends that the City Council make the following findings: a. The proposed subdivision, together with the provisions for its design and improvement, is consistent with the general plan and any applicable specific plan; The proposed project involves the subdivision of an existing 183,203 square -foot (4.2 gross acre) gross lot into three lots to accommodate the existing residence, and two vacant parcels for the future development of new single-family residences. Proposed Parcel I- is 64,297 square feet (1.47 acres), proposed Parcel 2 is 65,326 square feet (1.5 acres) and proposed Parcel 3 is 53,580 square feet (1.23 acres). The property is zoned Rural Residential (RR), and the underlying General Plan land use designation is also named Rural Residential, The development of a single-family residence on Parcels 2 and 3 will be processed through a Development Review application for compliance with the City's General Plan, City Design Guidelines and development standards. The project 2 TPM No. 72035 PL2016-01 will provide additional homeownership opportunities of single-family housing that will be compatible with the surrounding development. The project site is not part of any theme area, specific plan, community plan, boulevard or planned development. b. The site is physically suitable for the type and proposed density of development; The proposed subdivision will not interfere with the use and enjoyment of neighboring existing or future developments because the use of each lot is for a single-family home and the surrounding uses are also single- family homes. The maximum allowed density for the Rural Residential general plan land use designation' and zoning district is one dwelling unit per gross acre (I DU/Acre). Therefore, with a 4.2 acre lot, the proposed project is in compliance with the City's General Plan with regards to density. Also, the proposed location of the building pads and footprints are in compliance with the development standards. C. The design of the subdivision or the proposed improvements will not cause substantial environmental damage or injure fish or wildlife or their habitat; An initial study was prepared and it was determined that the proposed project qualifies for a Mitigated Negative Declaration. With the proposed mitigation measures, the project will not have a significant effect on the environment. In accordance to the provisions of Section 15070 of the CEQA guidelines, the City prepared and filed a Notice of Availability and Intent to Adopt a Mitigated Negative Declaration for the project on January 25, 2017, with the Los Angeles County Clerk. Pursuant to CEQA Section 15015, the public review period for the Mitigated Negative Declaration began January 25, 2017, and ended February 13, 2017. d. The design of the subdivision or type of improvements will not cause serious public health or safety problems; The grading will be constructed, operated, and maintained in accordance with the recommendations contained in the preliminary geotechnical investigation to assure that geotechnical stability is , maintained or increased. Detailed drainage and -hydrology studies. will be completed, including the potential for debris flows, and the proposed conditions of approval will likely prevent any significant increases in erosion and flood hazards. Before the issuance of any City permits, the proposed project is required to comply with all conditions within the approved resolution, and the Building and Safety Division and Public Works Departments, and Los Angeles County Fire Department requirements. Through the permit and inspection process, the referenced agencies will ensure that the 3 TPM No. 72035 PL2016-01 proposed project is not detrimental to the public health, safety or welfare or materially injurious to the properties or improvements in the vicinity. e. The design of the subdivision or type of improvements will not conflict with easements, acquired by the public at large for access through or use of, property within the proposed subdivision. Proposed Parcel I has an existing shared driveway with the adjacent property located at 22710 Timbertop Lane. Ingress and egress rights to and from the easement(s) for Parcel I will be maintained. The proposed subdivision will not conflict with this shared access. The proposed subdivision will not interfere with vehicular or pedestrian movements, such as access or other functional requirements of a single- family residence because the proposed parcels will comply with the requirements for driveway widths for each lot The discharge of sewage from the proposed subdivision . into the community sewer system would not result in violation of existing requirements prescribed by the California Regional Water Quality Control Board; The proposed subdivision will not violate any requirement of the California Regional Water Quality Control Board. Per the sewer system analysis submitted by Tritech Engineering Associates dated August 18, 2016, there will be no adverse effect on the existing public sewer system. The project will be connecting to the existing public sewer system which is in compliance with the California Regional Water Quality Control Board. g. A preliminary soils report or geologic hazard report does not indicate adverse soil or geologic conditions; and The grading will be constructed, operated, and -maintained in accordance with the recommendations contained in the preliminary geotechnical investigation to assure that geotechnical stability is maintained or increased. h. The proposed subdivision is consistent with all applicable provisions of the City's Subdivision Ordinance, the Development Code, and the Subdivision Map Act. The proposed subdivision is consistent with the City's Subdivision Ordinance, Subdivision Map Act, and applicable Development Code. In addition, the development of the new single-family residences on each lot -will be processed through a Development Review application for compliance with the City's development standards. 2. Based on the findings and conclusions set forth herein, the Planning Commission hereby recommends that the City Council approve Tentative 4 TPM No. 72035 PL2016-01 Parcel Map No. 72035, subject to the following conditions and the attached Standard Conditions of Approval: a. GENERAL 1.. The approval of Tentative Parcel Map No. PL 2016-01 expires within three years from the date of approval if the use has not been exercised as defined per Diamond Bar Municipal Code Section (DBMC) 21.20.140. The applicant may request in writing for a three year time extension if submitted to the City no less than 60 days prior to the approval's expiration date, subject to DBMC 21.20.150 for City Council approval; 2. Within five days of this approval, the subdivider/applicant shall pay to the City, the Department of Fish and Wildlife fee pursuant to Section 711.4 of the Fish and Game Code; 3. The applicant shall comply with the requirements of City Planning, Building and Safety Divisions, Public Works Department, and the Los Angeles County Fire Department; 4. This approval shall not be effective for any purpose until the applicant and owner of the property involved have filed, within twenty-one (21) days of approval of this Tentative Parcel Map No. PL 2016-01, at the City of Diamond' Bar Community Development Department, their affidavit stating that they are aware of and agree to accept all the conditions of this approval. Further, this approval shall not be effective until the applicant pay the remaining City processing fees, school fees and fees for the review of submitted reports; 5. The development of new single-family residences on each lot shall be submitted for review and approval of a Development Review application and shall comply with the City's Development Code; 6. Prior to any use of the project site being commenced thereon, all conditions of approval shall be completed; 7. The project site shall be maintained and operated in full compliance with the conditions of approval and all laws, or other applicable regulations; and 8. Standard Conditions. The applicant shall comply with the standard development conditions attached hereto. 5 TPM No. 72035 PL2016-01 b. TENTATIVE PARCEL MAP CONDITIONS Approval of the Tentative Parcel Map is for subdivision of land only. No land use or development entitlements are expressed or implied; 2. The development shall provide parcels, easements or rights-of- way for private streets, water supply and distribution systems, sewage disposal systems, storm drainage facilities, solid waste disposal and public utilities providing electric, gas, and telecommunications services; 3. All utilities shall be installed underground in compliance with DBMC Section 21.30.110; 4. The development shall carry out the specific requirements of Chapter 21.30 (Subdivision Design and Improvement Requirements) and Chapter 21.34 (Improvement Plans and Agreements) of the Subdivision Ordinance; 5. The design of the subdivision shall provide, to the extent feasible, for future passive or natural heating or cooling opportunities in the subdivisions, in compliance with Subdivision Map Act Section 66473.1; 6. Prior to final parcel map approval, the subdivider shall pay a parkland dedication in lieu fee for park and recreational purposes in the amount of $47,675.00, which equals the parkland obligation derived from the formula in DBMC Section 21.32.040(C) times the average per -acre fair market value for the appropriate park planning area. For the purposes of determining the required fee, the term "fair market value" shall mean the market value of the land as determined by the City staff, and approved by the Commission or Council, prior to or at tentative map approval. If the subdivider objects to the valuation, the subdivider, at his/her expense, may obtain an appraisal of the property by a qualified real estate appraiser approved by the City whose appraisal may be accepted by the City if found reasonable. Fair market value may be determined by mutual agreement of the City and subdivider; however, decisions of the City as to fair market value shall be final and conclusive. Any fees collected shall. be committed within five years after payment, or issuance of building permits on one-half of the lots created by the subdivision, whichever occurs later. If the fees are not committed, they shall be distributed and paid to the then record owners of the subdivision in the same proportion that the size of their lot bears to the total area of all lots within the subdivision; 6 TPM No. 72035 PL2016-01 7. The subdivider shall install any improvements necessary to fulfill the conditions of approval. Improvement shall be defined as any infrastructure including streets, storm drains, sewers and the like in accordance to DBIVIC Section 21.34.020 thru 21.34.030; and 8. The construction of the single-family residences on Parcels 2 and 3 shall not occur simultaneously. The Planning Commission shall: M (a) Certify to the adoption of this Resolution; and (b) Forthwith transmit a certified copy of this Resolution, by certified mail, to: USA Rongchen Development Inc., 21614 Fairwind Lane, Diamond Bar, CA 91765, and Tritech Associates, Inc, 135 N. San Gabriel Blvd., San Gabriel, CA 91775. ilk, I WMOW I Jennifer Mahlke, Chairperson 1, Greg Gubman, Planning Commission Secretary, do hereby certify that the foregoing Resolution was duly introduced, passed, and adopted, at a regular meeting of the Planning Commission held on the 14th day of February, 2017, by the following vote: AYES: Commissioners: NOES: Commissioners: ABSENT: Commissioners: ABSTAIN: Commissioners: ATTEST: Greg Gubman, AICP, Secretary 7 TPM No. 72035 PL2016-01 USE PERMITS9 COMMERCIAL AND RESIDENTIAL NEW ANY REMODELED STRUCTURES PROJECT #: Tentative Parcel Map No. PL 2016-01 SUBJECT: To subdivide an existing 183,203 square -foot (4.2 acres) gross lot into three separate lots for the development of a single-family residence on each lot. PROPERTY USA Rongchen Development, Inc. OWNER(S): 21614 Fairwind Lane Diamond Bar, CA 91765 APPLICANT: Tritech Associates, Inc. 135 N. San Gabriel Blvd. San Gabriel, CA 91775 LOCATION: 22702 Timbertop Lane, Diamond Bar, CA 91765 'Miff APPLICANT SHALL CONTACT THE PLANNING DIVISION AT (909) 839-7030, FOR COMPLIANCE WITH THE FOLLOWING CONDITIONS: A. GENERAL REQUIREMENTS In accordance with Government Code Section 66474.9(b)(1), the applicant shall defend, indemnify, and hold harmless the City, and its officers, agents and employees, from any claim, action, or proceeding to attack, set-aside, void or annul, the approval of Tentative Parcel Map No. PL 2016-01 brought within the time period provided by Government Code Section 66499.37. In the event the city and/or its officers, agents and employees'are made a party of any such action: (a) Applicant shall provide a defense to the City defendants or at the City's option reimburse the City its costs of defense, including reasonable attorneys fees, incurred in defense of such claims. 9 TPM No. 72035 PL2016-01 (b) Applicant shall promptly pay any final judgment rendered against the City defendants. The City shall promptly notify the applicant of any claim, action of proceeding, and shall cooperate fully in the defense thereof. 2. The subdivider/applicant shall remove the public hearing notice board within three days of this project's approval. 3. Approval of this request shall not waive compliance with all sections of the Development Code, all applicable City Ordinances, and any applicable Specific Plan in effect at the time of grading and building permit issuance. B. FEES/DEPOSITS 1 Applicant shall pay development fees (including but not limited to Planning, Building and Safety Divisions, and Public Works Department) at the established rates, prior to issuance of building or grading permit (whichever comes first), as required by the City. In addition, the applicant shall pay all remaining prorated City project review and processing fees prior to issuance of grading or building permit, whichever comes first. APPLICANT SHALL CONTACT THE BUILDING AND SAFETY DIVISION, (909) 839-7020, FOR COMPLIANCE WITH THE FOLLOWING CONDITIONS: 1. Los Angeles County Fire Department approval will be required. 2. The garages of the new residences shall be oriented for adequate back-up clearance as required by Public Works. 3. The project lies in a fire zone. Landscape and house design will require fuel modification and fire zone measures be implemented. 4. Parcel 1 shall be maintained with erosion control and maintenance of the existing property, including the pool. 5. Design of structures and grading shall be in conformance with geotechnical reports for the property including those by Cal Land Engineering, Inc. 6. All existing parcels shall be maintained free and clear of any trash and debris. 7. All structures shall maintain slope setbacks per CBC Figure 1805.3.1. 8. All work shall be in conformance to the current adopted California Building Code series based on the date of filing for the plan check application. 9 TPM No. 72035 PL2016-01 munawicy.-Brim, [Inac A. GENERAL 1 A title report/guarantee showing all fee owners, interest holders, and nature of interest shall be submitted for final map plan check. An updated title report/guarantee and subdivision guarantee shall be submitted ten (10) business days prior to final map approval. 2. A permit from the Los Angeles County Public Works Department shall be required for connection to its facilities. - 3. Prior to final map approval, written certification that all utility services and any other service related to the site shall be available to serve the proposed project and shall be submitted to the City. Such letters shall be issued by the respective utility company, within ninety (90) days prior to final map approval. 4. Prior to final Map approval, applicant shall submit to the City Engineer the detail cost estimates for bonding purposes of all public improvements. 5. Prior to final map approval, if any public or private improvements required as part of this map have not been completed by applicant and accepted by the City, applicant shall enter into a subdivision agreement with the City and shall post the appropriate security. 6. Easements for disposal of drainage water onto or over adjacent parcels shall be delineated and shown on the final map, as approved by the City Engineer. 7. Easements, satisfactory to the City Engineer and the utility companies, for public utility and public services purposes shall be offered and shown on the final map for dedication to the City. 8. After the final map records, applicant shall submit to the Public Works/Engineering Department, at no cost to the City, a full size reproducible copy of the recorded map. Final approval of the public improvements shall not be given until the copy of the recorded map is received by the Public Works/Engineering Department. 9. All activities/improvements for the proposed Tentative Parcel Map shall be wholly contained within the boundaries of the map. Should any off-site activities/improvements be required, approval shall be obtained from the affected property owner and the City as required by the City Engineer. Applications for the grading/development of the newly created lots shall be submitted to the Public Works/Engineering Department for review and approval. 10 TPM No. 72035 PL2016-01 C. All pertinent improvement plans shall be approved by the City Engineer accordingly and other applicable City Departments as determined necessary. 2. Grading plans for each lot shall be submitted to the Community Development Department/Planning Division for review and approval prior to issuance of grading and building permits. 3. Grading of the subject property shall be in accordance with the California Building Code, City Grading Ordinance, Hillside Management Ordinance and acceptable grading practices. 4. The maximum grade of driveways serving building pad areas shall be 20 percent. In hillside areas driveway grades exceeding 10 percent shall have parking landings with a minimum 16 feet deep and shall not exceed five (5) percent grade or as required by the City Engineer. Driveways with a slope of 15 percent or greater shall incorporate grooves for traction into the construction as required by the City Engineer. 5. Final grading plans shall be designed i.n compliance with the recommendations of the final detailed soils and engineering geology reports. All remedial earthwork specified in the final report shall be incorporated into the grading plans. Final grading plans shall be signed and stamped by a California registered Civil Engineer, registered Geotechnical Engineer and registered Engineering Geologist and approved by the City Engineer. FITATIMPITC-N Cross lot drainage easements, if applicable, shall be identified on the final map. Cross lot drainage will not be permitted unless that is the natural drainage course. D. UTILITIES 1 Easements, satisfactory to the City Engineer and the utility companies, for public utility and public services purposes shall be offered and shown on the final map for dedication to the City. 2. Prior to recordation of final map, applicant shall provide separate underground utility services to each parcel per Section 21.30 of Title 21 of the City Code, including sewer laterals, water, gas, electric power in accordance with the respective utility company standards. Easements required by the utility companies shall be approved by the City Engineer. 3. Underground utilities shall not be constructed within five feet of the drip line of any mature tree except as approved by a registered arborist. TPM No. 72035 PL2016-01 E. SEWERS The sanitary sewer system serving the parcels shall be connected to the Los Angeles County maintained sewer system. Said system shall be of the size, grade and depth approved by the City Engineer, County Sanitation District and Los Angeles County Public Works and surety shall be provided and an agreement executed prior to approval of thefinalmap. 2. Applicant shall obtain connection permit(s) from the City and County Sanitation District prior to issuance of building permits. 3. Applicant, at applicant's sole cost and expense, shall construct the sewer system in accordance with the City, Los Angeles County Public Works Division and County Sanitation District Standards prior to Final Map Approval. If said improvements are not completed prior to final map approval, a subdivision agreement shall be executed by the applicant and security posted ensuring the completion of improvements. ME 12 TPM No. 72035 PL2016-01 NOTICE OF AVAILABILITY AND INTENT TO ADOPT ZA MITIGATED NEGATIVE DECLARAT � �7��� "�����` &/ � ���� °� . �»'` `u// City of Diamond Bar, 21810 Copley Drive, Diam—ond Bar, CA 91765 (909) 839- - — ' ---' ^ �JOT|{�E' Pursuant to the provisions of the California EnvironmentalC1ua|�y Act (���D\— ' Public Resources de, Section 211OOet. Seo')` the City of Diamond Bar has determined that the project referenced hereinafter will not have u significant effect oo the environment. Adraft --��gmbed Negative Declaration has been prepared for review and approval in connection with project approvals and conditions of approval that the City proposes to impose mnthe project. PROJECT TITLE: Tentative Parcel Map No. 72O35(Planning Case No. PL2O16-01) PROJECT ADDRESS: 22702 Timbertop Lane, Diamond Bar, CA 91765 PROJECT DESCRIPTION: The project 'p ^ecte�e is located within The Country Eatetee, a gated residential community oan/ed by private streets in the City of Diamond Bor. The applicant is requesting City approval to subdivide an existing 183.203 square -foot (4.2 gross acre) lot constructed with onex�tingoing|e-fani\yresidence into three lots for the future development Ofnew single-family Proposed Parcel 1ieG4.207square feet (1.47 acres), proposed Parcel 2iaO5.32Osquare feet (1.5 acres) and proposed Parcel 3ia53.58O square feet `1.23auree . The existing single-family residence and accessory structure will remain ' le-familidonceaw�Ubepvopoe�donpnnpoeedPorce|o2and3 opproposed Parcel 1. Ne»«omg yreo |Residential (RR) and the undedying(3eOero\Plan sd�futura�nne� Theprnp��viszon�dR�na, ,. land use designation ioalso named Rural Residential /FlR\. PROPERTY OWNER: USA F<ongchenDevelopment, \no..21O14FairwiOdLane, Diamond Bar, CA 91765 APPLICANT: TriteohAssociates |nc,135N.San Gabriel Blvd,San Gabriel, CAS1775 A copy of the Initial Study, documenting reasons to support the findings that said projectvvou|dnot have a significant effect which contains mitigation measures, to avoid potentially significant effects, is attached hereto for public review and available at the Planning Division. AnEnvironmental Impact Report is not required for this project. Environmental Determination: Pursuant tothe provisions ofthe California Environmental Quality Act(CEQA)Section 15D7O.the CitvpneparedonInitial Study and K8itigotedNegative Declaration this `io pr-' J^ �` ot. Pursuant to CE Section 15105. the public review period for the Mitigated \arationbeginsJanuory1S.2O17andendsFebruory8.2O17. TIME (]FHEARING: 7:OOp.nn.(or oSsoon thereafter that the matter can beheard) DATE OF PUBLIC HEARING: Tuesday, February 14.2O17 LOCATION: Diamond Bar City Hall —VVindrni|| Community Room 21O1OCopley Drive Diamond Bar, CA81785 CASE MATERIALS are available for review between the hours of 7:30 a.m. and 5:30 p.m. Monday through Thursday and 7:30 a.m. to 4:30 p.m. on Friday, at the City of Diamond Bar, CornnnunUv Development Department/Planning Division, 21810 Copley Dr., Diamond Bar, CA 91765. 0ATetativewapsnM72035rimbemop Lane zooupmo16-001\CEQ*\Notice of Intent CITY OF DIAMOND BAR - 21825 COPLEY DRIVE - DIAMONDBAR, -CA 91765 - TEL. (909) 83119-7030 Project File: Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) 2. Lead Agency Name and Address: City of Diamond Bar 21810 Copley Drive Diamond Bar, CA 91765 3. Contact Person and Phone Number: Mayuko Nakajima, Associate Planner (909)-839- 7033 4. Project location: 22702 Timbertop Lane, Diamond Bar, CA 91765 5. Project Sponsor's Name and Address: Tritech Engineering Associates, 135 N. San Gabriel Blvd, San Gabriel, CA 91775 6. General Plan Designation: Rural Residential (RR) 7. Zoning: Rural Residential (RR) 8. Description of project: (Describe the whole action involved, including but not limited to later phases of the project, and any secondary, support, or off-site features necessary for its implementation. Attach additional sheets if necessary) The applicant is requesting City approval to subdivide an existing 183,203 square - foot (4.2 gross acre) lot constructed with an existing single-family residence into three lots for the future development of new single-family residences on the two newly created lots. Proposed Parcel I is 64,297 square feet (1.47 acres), proposed Parcel 2 is 65,326 square feet (1.5 acres) and proposed Parcel 3 is 53,580 square feet (1.23 acres). The existing single-family residence and accessory structure will remain on proposed Parcel 1. New single-family residences will be proposed on proposed Parcels 2 and 3 at a future time. The property is zoned Rural Residential (RR), and the underlying General Plan land use designation is also named Rural Residential. The average slope of the subject property is 32.7 percent. This project would have been categorically exempt from CEQA under Article 19, Section 15315, Class 15 (Minor Land Divisions) of the CEQA Guidelines, except for the fact that the average slope of the property is greater than 20 percent. The proposed subdivision is in conformance with the General Plan and zoning regulations, no variances or exceptions are proposed, and all public services and utilities including water supply are available to serve the project. The project site is located within The Diamond Bar Country Estates ("The Country"), a gated residential community served by fully improved private streets and surrounded by residential development. There are no agricultural activities on or near the proposed project Initial Study for City of Diamond Bar Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) Page 2 site. The subject property has four protected trees on-site but no protected trees are proposed for removal. The proposed project does not involve long-term changes to land use or other growth -inducing actions that could impact compliance with or implementation of the Air Quality Management Plan. The proposed project is not expected to generate potentially significant greenhouse gases in that the future construction and occupancy of two single-family residences (which would be enabled by the proposed subdivision) would not exceed greenhouse gas significance thresholds. Upon the completion of the environmental analysis, it was determined that, as conditioned, the proposed project would have less than a significant effect on the environment. 9. Surrounding land uses and setting: (Briefly describe the project's surroundings) North: HOA Recreation Facility and Single -Family Residence in RR (Rural Residential) zone. South: Single -Family Residence in RR (Rural Residential) zone. West: Single -Family Residence in RR (Rural Residential) zone. East: Single -Family Residence in RR (Rural Residential) zone. 10. Other agencies whose approval is required (e.g., permits, financing approval, or participation agreement): None. ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED The environmental factors checked below would be potentially affected by this project, involving at least one impact that is a "Potentially Significant Impact," "Potentially Significant Impact Unless Mitigation Incorporated," or "Less Than -Significant -Impact" as indicated by the checklist on the following pages. Aesthetics Biological Resources Greenhouse Gas Emissions Land Use & Planning Population & Housing Transportation/Traffic Rev 1-13-17 ( ) Agricultural Resources (X) Cultural Resources Hazards & Waste Materials Mineral Resources Public Services Utilities & Service Systems Air Quality Geology & Soils Hydrology & Water Quality Noise Recreation Mandatory Findings of Significance |DiUG| Study for City of Diamond Bar Tentative Parcel Map No. 72O35(Planning Case No. PL2O1O-01) -Page 3 DETERMINATION On the basis of this initial evaluation: /\ | find that the proposed project COULD NOT have 8significant efheCtoOthe8DvroOrn8Dt A NEGATIVE DECLARATION will be prepared. 0O | find that although the p[OooSBd project could have 8 significant 8�Ct on the ' ' environment, there will not be 8 significant effect iDthis C8Se because [8VoioDa in the project have been made by, or 8g[88d to, by the project proponent. A MITIGATED NEGATIVE DECLARATION will be prepared. / ) | find that the proposed project MAY have a significant effect OD the eDV[oDOUeDt and an ENVIRONMENTAL IMPACT REPORT is required. () | find that the prOpOSed'eCtMAY have a"Potentially Significant Impact" O["POteO�8Uy Significant UD|eG3 Mitigated" iDlp8CtOOthe 8DViFoODleDt. but at least one 8f�x� 1\ has been adequately analyzed in an earlier document pursuant to Bpp\in@b|8 legal et8OdGFd and 2\ has been addressed by mitigation measures based on the earlier analysis as h' deSCed on attached sheets. An ENVIRONMENTAL IMPACT REPORT is [8qUinad, but itmust analyze only the effects that remain tObeaddressed. (\ i find that 80lOUgh the proposed project could have 8 significant effect on the environment, because all potentially significant effects 1) have been analyzed adequately in an a8die[ BR or NEGATIVE DECLARATION pursuant to applicable St8Od@Fda. and 2\ have been avoided or mitigated pU[oU8[d to that earlier BR or NEGATIVE DECLARATION, including PeViSiDOo or mitigation measures that are imposed upon the proposed project, OOthiDgfUrthe[ier8qui[ed. Prepared By: Date: Reviewed By: Dote: Rev 1-13-17 Initial Study for City OfDiamond Bar - -Tentative Parcel Map No. 72O35(Planning Case No. PL2O10-01) - Page 4 EVALUATION OFENVIRONMENTAL IMPACTS I AESTHETICS. Would the project: Less Than a) Have a substantial adverse effect on a scenic Significant Less Issues and Supporting Information Sources: Potentially Signilicant With Mitigation Than Significant No State Scenic Highway? Impact Incorporated Impact Impact EVALUATION OFENVIRONMENTAL IMPACTS I AESTHETICS. Would the project: a) Have a substantial adverse effect on a scenic outcroppings, and historic buildings within a Impact OiScUS5iOD: The project Site is located within an existing gated residential COOlDlUDitv. surrounded by residential daVBl0pDleOt The proposed project will haVe 8 l8SS than SigDihC8Ot impact on the scenic ViSt8S that exist in The C0UD/n/ Estates such as city lights, fOOthi||g. and c8OVoOS. The pn]pOG8d lots are located at the bottom of the slope along Lazy K888doVV Drive and will not impact the vistas Ofexisting homes. b) Substantially damage scenic resources, including, but not limited to, trees, rock outcroppings, and historic buildings within a State Scenic Highway? !Dlp8Ct DiooUSGiOO: No officially designated State eoODiC routes or highways DCCU[ near the project site. C) Substantially degrade the existing visual character or quality of the site and its views in the area? Impact Discussion: The project aiteiS|OcatedVVithiD 2Oexisting gated residential community, 8UnnUDded by residential d8Ve|0pOleDt and therefore will be compatible with the surrounding US8G. The project proposes to subdivide an existing lot into three |OtS for the development of @ single-family residence ODthe newly created lots, and an existing single-family residence will be preserved on the remaining |OL The development of single-family homes will be subject to the City's [}eVe1OpDOeOt Code standards and design gVidB|iDe8` as well as the 8FChiteCtUne| standards established by the Homeowners Association. As such, the proposed project will OOt degrade the existing visual character o[quality Ofthe site and its surrounding. d) Create a new source of substantial light or glare, which would adversely affect day or nighttime views in the area? |Dlpmnt UiSQJoaioD: Light emitted from the deV8|OpDleOt of two new single-family residences will be COO8iate[d with the existing residential USeS that eUrrOUDd the project site. As part of the development Ofthe single-family residences, lighting will be included around the building and interior of the building. TO nadUD8 the impact OD @di@C8Dt pFope[U8e. any new aX[eho[ lighting will be directed 3VV8y or Shielded SO that it in CDOhDed within the boundaries of the property pursuant to Development Code StGOdanjS. Compliance with the Development Code will Raau|t in nonsignificant light and glare impacts. Rev 1-13-17 (���vOf[}i8OloOdBar Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) . I Page 5 Initial Study for � 2. AGRICULTURAL RESOURCES. Would the project: 0 Less Than 0 V) a) Convert Prime Farmland, Unique Farmland, or Significant Less V) issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No as shown on the maps prepared pursuant to the Impact Incorporated Impact Impact 2. AGRICULTURAL RESOURCES. Would the project: 0 0 0 V) a) Convert Prime Farmland, Unique Farmland, or 0 0 V) Farmland of Statewide Importance (Farmland), as shown on the maps prepared pursuant to the Farmland Mapping and Monitoring Program of the California Resources Agency, to non- agricultural use? |Dlp8Ct DiecUSS|0O: |h8 project site is nnz oos/gnaouu mu 1111 It:: rm/oxu//u. w"y"= . ".""�.." = Farmland ofStatewide Importance. There are Doagricultural activities oDO[near the proposed project site. Project iDlpkaDleOt@tiOO VVoU\d not result in the COOVenSiOO of f@rD)@Dd to DODagricultural use. Therefore the proposed project would have no impacts to farmlands. - b) Conflict with existing zoning for agricultural use, V) or a Williamson Act contract? |Dlp8Ct [)ioCUgsk]n: implementation OT [Oe proposed p/cgUcL vvuum //uL uv/m/kL ,vm` =^="..y ZoDiOA for aQhcUltUn3| use, or @ \NiUi8DleOO Act contract. TheFefOne. OO iDlD@CtS VvoU|d result from the construction or operation of the proposed project. C) Conflict with existing zoning for, or cause re- 0 0 0 V) zoning of, forest land (as defined in Public Resources Code section 12220 (g), timberland (as defined by Public Resources Code section 4526), or timberland zoned Timberland Production (as defined by Government Code Section 51104 (g))? |D`o—aot .[hsoUSe}OO: |hePB are no pon:ru/anu. umu: //m/m m m"U.=." ""..�" ."". Production uses that are occurring on-site or in the immediate vicinity. Thus, the p[Oo.o.~ee..d project o0ee not iOVOlV8 changes in the 8X,StiDg environment that could conflict with existing ZoDiOg or c@Ua8 of rezoning of fOn�st|8Dd, timberland, ortimberland zoned Timberland Production. d) Result in the loss of forest land or conversion of 0 forest land to non -forest use? Impact Discussion: lheaUU]ectproperty |snot /ucauUuvvmIII /m/rZ)Ltell ,U.C1/m="".U0..=,°," impact in this category. e) Involve other changes in the existing 0 0 0 environment, which, due to their location or nature, could result in conversion of Farmland, to non-agricultural use or conversion of forest land to non -forest use? Impact Discussion: | here are OoT@rm|anousebu/ui.u/UuUUu//x,Umr0/o=". 11 "".""".�"^""~ vicinity. Thuo, the proposed project does not involve changes in the existing environment that Rev 1-13-17 Initial Study for City ofDiamond Bar Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01.) Page 6 3. AIR QUALITY. Would the project. - Less Than V) V a) Conflict with or obstruct implementation of the Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No applicable Federal or State ambient air quality Impact Incorporated Impact Impact 3. AIR QUALITY. Would the project. - V) V a) Conflict with or obstruct implementation of the applicable air quality plan? |Dlp8Ct [)iSCUSSiOO: The proposed project does DOtiOVO|Ve |OOg-herDl changes to land use Or other growth -inducing actions that COU|d impact oo0p!i8nCB with or i0p|eDngOtgtoD of the Ai[ C}U@|ity K8@OageOlBDt Plan. The CODStFUCtioD of two 8iDg|B-f@Dli|y nBGid8DceS will not occur eiOlUltaneOUS|y. as conditioned. The project will not exceed thresholds for Dl@XirDuDl daily CODStrUCtiOO eDliSSiOOS for pO||Ut8OtS and OO mitigation is required. After the completion of the COOStrUCti0D aCtiViti8S, it is not anticipated that there will be an increase in eDliSSiOOS from operational activities of two new single-family residences. /\|eo. @ three -lot subdivision falls well below the South Coast Air {}Ua|itV K8anGgenlaOt District Air Quality Handbook Threshold for C[itS[i3 pollutants. Th8[9fDPe. impacts from Ope[8tiODU| activities would be less than significant. b) Violate any air quality standard or contribute V) V substantially to an existing or projected air quality project region is non -attainment under an Impact Discussion: See response a above. C) Result in a cumulatively considerable net V) V increase of any criteria pollutant for which the project region is non -attainment under an applicable Federal or State ambient air quality standard (including releasing emissions that exceed quantitative thresholds for ..ozone Impact Discussion: See response aabove. d) Expose sensitive receptors to substantial 0 V pollutant concentrations? Impact Discussion: See response aabove. e) Create objectionable odors affecting a substantial 0 V number of people? |O0p8Ct Discussion: The proposed project will [8Sult in the development Oftwo new single-family residences. The proposed project is therefore Ootexpected tOgenerate objectionable odors affecting 8 aUbmt8Oti8| number ofpeople. Construction activity associated with the proposed project may generate detectable odors from heavy-duty equipment exhaust. However this impact would be short-term in nature (only during construction activities) and cease upon project C0Dlp|etiOO. Rev 1-13-17 (�hvofDioDlOOdBar |OdO8|��Udyfo[ �� Tentative Parcel Map No. 72035(Planning Case No. PL2018-01) Page 4. BIOLOGICAL RESOURCES. Would the project: Less Tha (VO a) Have a substantial adverse effect, either directly Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No identified as a candidate, sensitive, or special 4. BIOLOGICAL RESOURCES. Would the project: (VO a) Have a substantial adverse effect, either directly or through habitat modifications, on any species identified as a candidate, sensitive, or special status species in local or regional plans, policies, or regulations, or by the California Department of Fish and Game or U.S. Fish and Wildlife Impact Discussion: The project urbanizedvV� site is in 8D U[�@Ded @[B8. located within an existing gated residential community, surrounded bvresidential development. The property has four protected t[8BS OO -Site but OO protected trees are proposed for removal. The SUhieCt property is already disturbed and pGa[ development activity on the SUhieCt property and o|ODg the Country's [O8dVV@y network has eradicated habitat in 8na8G immediately adjacent tOthe roads. The[SfoFe, the proposed project would Dot result in significant adverse impact to Federal or State listed or other designated species. b) Have a substantial adverse effect on riparian (VO habitat or other sensitive natural community identified in local or regional plans, policies, or regulations or by the California Department of Fish and Game or US Fish and Wildlife Service? hDpeCt Discussion: As previously stated, the project site is located within an eX|aDnO gated residential ooDlO)UDhvNO riparian habitat or sensitive DatU[o| communities exist on-site. F� According to the Resource K8@O8geDlent Element of the City's EleDer8| P\aD, the project site is not identified oShaving sensitive environmental resources. C) Have a substantial adverse effect on federally protected wetlands as defined by Section 404 of the Clean Water Act (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other Impact Discussion: No federally protected wetlands occur DD -Site. |DereTD[eimplementation cn the proposed project would not result in any impacts in this regard. d) Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use of native wildlife nursery sites? Impact Discussion: There may be native resident or Ol|g[@t0[yw0k1|ITe Sp8o|eS within The Country Estates, and nesting opportunities or raptor/wildlife foraging the project site have been largely eradicated. In light of the existing conditions, of the proposed project would not result in significant impacts in this regard. Rev 1-13-17 |Othe canyons opportunities on Initial Study for City OfDiamond Bar Tentative Parcel Map No. 72O35(Planning Case No. PL2016-01) Page Less Than Significant Less Potentially VVIth Than Issues and Supporting Information Sources: Significant Mitigation Significant Impact Incorporated Impact e) Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance? I mpact Discussion: DiSCUGSioD: The property has four protected trees on-site but DO protected trees are p[UpOS9d for [80oV8i Grading will not eDCnD@Ch within the protected ZDOeG of the protected trees. If trees are proposed for F800V8l. the {}ib/'G Tree Preservation [}ndiO8OC8 requires the applicant to obtain 3 7 -Fee p8F0it with appropriate mitigation. In light Of these f8CtOnG, the proposed project does not CVDf|iCt with any local policies or OPdin@OC8S protecting biological poeouvoee' Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community conservation Plan, or other approved local, regional, or State habitat conservation plan? e) Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance? I mpact Discussion: DiSCUGSioD: The property has four protected trees on-site but DO protected trees are p[UpOS9d for [80oV8i Grading will not eDCnD@Ch within the protected ZDOeG of the protected trees. If trees are proposed for F800V8l. the {}ib/'G Tree Preservation [}ndiO8OC8 requires the applicant to obtain 3 7 -Fee p8F0it with appropriate mitigation. In light Of these f8CtOnG, the proposed project does not CVDf|iCt with any local policies or OPdin@OC8S protecting biological poeouvoee' Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community conservation Plan, or other approved local, I mpact Discussion: DiSCUGSioD: The property has four protected trees on-site but DO protected trees are p[UpOS9d for [80oV8i Grading will not eDCnD@Ch within the protected ZDOeG of the protected trees. If trees are proposed for F800V8l. the {}ib/'G Tree Preservation [}ndiO8OC8 requires the applicant to obtain 3 7 -Fee p8F0it with appropriate mitigation. In light Of these f8CtOnG, the proposed project does not CVDf|iCt with any local policies or OPdin@OC8S protecting biological poeouvoee' Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community conservation Plan, or other approved local, regional, or State habitat conservation plan? |Dlp8Ct DioCUSSiOD: There are OO adopted Habitat Conservation Pl@O, Natural C0[nOlUDit« Conservation Plans or other approved |OC8i [8giOO@|. or state habitat CODSB[VatoO p|GOS applicable tothe project area. Therefon8the proposed project would DOt PeSU|t in impacts in this regard. 5. CULTURAL RESOURCES. Would the project: a) Cause a substantial adverse change in the significance of a historical resource as defined in Impact Discussion: The proposed project may have B significant @dV8rS8 impact if it would cause 8 SUbetgOti@| adverse change in the significance of historical resource as defined in Section 15064.5 of the CEQA Guidelines. This section of the CEQA GUid8|iD8S defines @ hiStUhC@| [eSOUFCe as one listed in or eligible for listing in the California Register Of Historical Resources /[|RHR\ (per state law), included in @ |OC8| register Of historical FaeVu[C8S (8S defined by state )@m) or identified as significant in an hiStOhC@| FeSOUrC8 survey (meeting the requirements Of state |8m) Or determined by the lead egaOcV /City of [)ia0ODd Bar) to be historically significant or significant in the @[ChiteCtU[8|. 8DgiOR8hDg, scientific, eCODODlin' agricultural, edUC@tiOOa|. SOCiGl. political, military, or CU|tU[@| 8DD8|S Of California, provided the determination is supported by oUbSt8Dti@| evidence in light of the whole F8CO[d. G8Der@||y. 8 ne5OU[CS shall be considered by the |88d agency to be "historically significant" if the PesOUFCe meets the C[it8[i8 for listing OD the CFlHR. A single-family residence, also hOOVVO as the "California Bicentennial Horne'" and aCCeSSOFy structure exists OO the parcel. The California BicSOt8DOi8| Home was evaluated for significance under criteria based on the CE{}A. as amended in 2015. which iDC|UdeS criteria for eligibility to the CRHR. According to an Architectural and Historical Significance Assessment conducted by Archaeological Associates on August O. 2016. the GDa|ySiS indicated that it was one of three ShOVVnaae hoDl8S designed and CODSt[Uoted for the sole purpose of prOrDOtiOQ CUSt0DO home development in the "The Country." In 1970' The CoUOt[y, was o recreation 8>-r85ideOti@| p|8DO8d development with an equestrian theme developed by the new Transamerica Development Company. Research and analysis has indicated that the PeSid8DC* appears eligible for the CRHR under Criterion 3, due to association with noted Southern Californian architect RaU| G8FdUDO. /\dditioOa}|y, the home Rev 1-13-17 Initial Study for City of[UoDloDdB8[ Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) Page 9 appears eligible for local listing only under Criterion 3 as it is important tOthe City of Diamond B8[; hoVVeve[, there is OO local historical register in the City of Diamond B8[ It does not 8pp88[ eligible, either at the state level or locally, under Criteria 1 or 4. The applicant intends to preserve the "California Bicentennial Home" OO Site. HOYVeVe[, in the event that demolition of the residence is desired, then 8 mitigation p[Og[8On designed to reduce the level of the [eaoU[Ce'o significance to @ level of insignificance Sh8|| be i[Op|eDl8Ot9d. This can be achieved through 8 comprehensive recordation program known as a Historic American Building Survey (HABS) and companion document, @ Historic American Engineering Record (HAER). The HABS/HARcomprises of the following: 1\a series ofhigh quality technical photographs of both the interior and exterior of the building, 2) the generation of SC@|8 d[aVvDgS of one or more 8|8V8UnDS, and 3\ @ more thorough written oD@)Vsig Of the building's architecture and construction. Photo ' documentation for the project ahOU|dbB@oCODlp|iShedbyUsiOgbnth4"X5" large f0[[D8t black {k white photographs supplemented by medium f0[0ot 2" X 2" nO|O[ photographs and digital photographs. At 8 [niDi[DUOO, each e|evoUOD of the house will be photographed in the 4"X5''format. Supplemental photographs utilizing the large and medium format media will be taken on an as needed basis. The archival pPDCeSSiDg and packaging of these prints Sh8|| be in accordance with HABS specifications GG closely as practical. Pen -and - ink Go8|8 d[8vV\Dga of the exterior of the residence will be generated as well as 8 basic floor p|8D of the house. Additi0Dal|y, a sep8[ot8, eC@|Bd site p|8O will be COnOpi|8d. This drawing will show the relationship of the hOUeg to other features on the property. VVheF8 feasible, Dl8@GUreDl8Ots for the drawings shall be taken by hand. Where hand Dle8SUPeFO8Oto are irDpr8Ctiog|, they oh8|| be made with the aid Of a transit and figured t[iQOOoOUethCa||y. &18aaU[80ents 5h8|| be initially recorded on \8[ge-aC8\e field sketches which will later be used as the basis of the drawings. All d[8VViO0S shall be produced and processed as per HAEFlspecifications. Supplemental Feneon}h Sh8|| also be conducted on the building's architecture and construction. That iOfOrOn8ti0O will be compiled into an i|lUSt[8t8d. Da[GdiVe report. The format and packaging Of the report shall oODfo[Dl to HAER specifications although coordination with the N8tiOOe| Park 88[Vioe is not F8o0[O[OeDded for G CE(]A level HABS/HAER study. When cODlp1nt8d. the recommended mitigation Ole8sU[BS as described above will have reduced the project i[np@Cto OO historic resources to a level of less than significant with mitigation incorporated. Recommended Mhj0GtiOD K8eeaU[e CR -1: Provide written and photographic dnnU[Dent8tOO in conformance with F|ABG/HAER Guidelines in the event that demolition Of the "California Bio8OteOOi8| Home" iodesired. b) Cause a substantial adverse change in the Less Than 0 0 significance of an archeological resource Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No Impact I—, appears eligible for local listing only under Criterion 3 as it is important tOthe City of Diamond B8[; hoVVeve[, there is OO local historical register in the City of Diamond B8[ It does not 8pp88[ eligible, either at the state level or locally, under Criteria 1 or 4. The applicant intends to preserve the "California Bicentennial Home" OO Site. HOYVeVe[, in the event that demolition of the residence is desired, then 8 mitigation p[Og[8On designed to reduce the level of the [eaoU[Ce'o significance to @ level of insignificance Sh8|| be i[Op|eDl8Ot9d. This can be achieved through 8 comprehensive recordation program known as a Historic American Building Survey (HABS) and companion document, @ Historic American Engineering Record (HAER). The HABS/HARcomprises of the following: 1\a series ofhigh quality technical photographs of both the interior and exterior of the building, 2) the generation of SC@|8 d[aVvDgS of one or more 8|8V8UnDS, and 3\ @ more thorough written oD@)Vsig Of the building's architecture and construction. Photo ' documentation for the project ahOU|dbB@oCODlp|iShedbyUsiOgbnth4"X5" large f0[[D8t black {k white photographs supplemented by medium f0[0ot 2" X 2" nO|O[ photographs and digital photographs. At 8 [niDi[DUOO, each e|evoUOD of the house will be photographed in the 4"X5''format. Supplemental photographs utilizing the large and medium format media will be taken on an as needed basis. The archival pPDCeSSiDg and packaging of these prints Sh8|| be in accordance with HABS specifications GG closely as practical. Pen -and - ink Go8|8 d[8vV\Dga of the exterior of the residence will be generated as well as 8 basic floor p|8D of the house. Additi0Dal|y, a sep8[ot8, eC@|Bd site p|8O will be COnOpi|8d. This drawing will show the relationship of the hOUeg to other features on the property. VVheF8 feasible, Dl8@GUreDl8Ots for the drawings shall be taken by hand. Where hand Dle8SUPeFO8Oto are irDpr8Ctiog|, they oh8|| be made with the aid Of a transit and figured t[iQOOoOUethCa||y. &18aaU[80ents 5h8|| be initially recorded on \8[ge-aC8\e field sketches which will later be used as the basis of the drawings. All d[8VViO0S shall be produced and processed as per HAEFlspecifications. Supplemental Feneon}h Sh8|| also be conducted on the building's architecture and construction. That iOfOrOn8ti0O will be compiled into an i|lUSt[8t8d. Da[GdiVe report. The format and packaging Of the report shall oODfo[Dl to HAER specifications although coordination with the N8tiOOe| Park 88[Vioe is not F8o0[O[OeDded for G CE(]A level HABS/HAER study. When cODlp1nt8d. the recommended mitigation Ole8sU[BS as described above will have reduced the project i[np@Cto OO historic resources to a level of less than significant with mitigation incorporated. Recommended Mhj0GtiOD K8eeaU[e CR -1: Provide written and photographic dnnU[Dent8tOO in conformance with F|ABG/HAER Guidelines in the event that demolition Of the "California Bio8OteOOi8| Home" iodesired. b) Cause a substantial adverse change in the (_1") 0 0 significance of an archeological resource pursuant to § 15064.5? Impact Discussion: AB 52 requires notification/request for IODa| Consu|tatmn. * nour/cauon ouu was obtained from the Native American Heritage Con101iaSiOO and the City sent notices tOthe Tribes informing them of the opportunity to request consultation. On December 1, 2016, the City received a letter from the Gabrie|e�o Band of Mission Indians (P(iZh NotiOD), indicating that the project area lies in an area where the @Dces1[8| territories of the KiZh (Ritc) G8b[ie|ahO'a villages adjoined and overlapped. Due to the project location and the high sensitivity Of the area |O'otion, the tribe had requested o certified Native AnOehCaO Monitor to be on site during any Rev 1-13-17 |DUi8| Study for []tv of Diamond Bar Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) Page 10 and all ground distU[b8DD8S (including but not limited to p8V8OOSDt [8DloVa[ post holing, 8WgUhOg, boring, grading, 8XC@votioO and trenching) to protect any CUKU[@| resources which may be effected during construction or development. Recommended PNUOQatiOO K8e@SUFe CR -2: A certified Native American K8VOUD[ shall be on site during any and all ground disturbances (including but not limited to pavement R»[DOV@L post holiOg, aUgUhOg, boring, grading. 8XC@V@tioD and trenching) to protect any CU|tU[@l [BBDU[CeS which may be affected during construction or development. C) Directly or indirectly destroy a unique Less Than V) paleontological resource or site or unique Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No loss, injury, or death involving: Impact Incorporated Impact Impact and all ground distU[b8DD8S (including but not limited to p8V8OOSDt [8DloVa[ post holing, 8WgUhOg, boring, grading, 8XC@votioO and trenching) to protect any CUKU[@| resources which may be effected during construction or development. Recommended PNUOQatiOO K8e@SUFe CR -2: A certified Native American K8VOUD[ shall be on site during any and all ground disturbances (including but not limited to pavement R»[DOV@L post holiOg, aUgUhOg, boring, grading. 8XC@V@tioD and trenching) to protect any CU|tU[@l [BBDU[CeS which may be affected during construction or development. C) Directly or indirectly destroy a unique V) paleontological resource or site or unique geologic feature? Impact Discussion: The projectSitek5 located within existing gated residentialCOrODlonitv. /\uCOrdiOg to the Draft G9Den8| P}oD Existing Conditions Report \/O|UOle I||. pages 32-33 (January 2017), low lying terrain areas (such as Brea Canyon and San Jose Creek) consist of younger (]U8t8FD@ry A!lUViUDl derived from the draiDog8s. which are not kDOVVO to COOt8iO significant vertebrate fossils in the Uppe[Dl0St layers. Elevated portions of the Puente Hills within the city also have exposures Ofthe marine late aforementioned Miocene -aged [approximately 23 DOil|iOO years @g0 (K88) to 5.3 K8@] Puente/Monterey Formation. 8h8||0VV 8XCRVetiOO8 into younger Quaternary Al|UViUnn deposits within the Qty are not likely to yield p8|eODtO|OgiCa| [oaoUPCeG. However, deeper excavations within the City (that extend d0VVO into older Quaternary deposits or into the Puente Formation) have the potential to encounter paleontological PBSOUrCeS. TherBfOn8, potential impacts would be less than significant. d) Disturb any human remains, including those interred outside of formal cemeteries? |Dlp@[t Discussion: It is not anticipated that hUDl@O neDl8iDa exist within the project site. However, should any huDloO neOl@iDG be encountered during any earth nBDloV8| or disturbance activities, all activity shall cease immediately and the Los Angeles COUDtv Coroner must be notified within 24 hOU[e of the discovery, in @CCnnd8nCe with Public Resources Code 88Cti0D 5097.94. If the COrODe[ determines that the r80@iOn are not recent, the COOl8[ shall notify the Native ArDehC8D Heritage COn8OlioeiOD for onDeU|tGtiOD in 8CCOFd8DCe with PRC Section 5097.98. 6. GEOLOGY AND SOILS. Would the project: a) Expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving: i) Rupture of a known earthquake fault, as delineated on the most recent Alquist-Priolo Earthquake Fault Zoning Map issued by the State Geologist for the area or based on other substantial evidence of a known fault? Refer to Division of Mines and Geology Special Publication 42. Rev 1-13-17 Initial ofOi8nnoDdBar a| Study for __, Tentative Parcel Map No. 72O55(Planning Case No. PL2016-01) Page 11 \[DnaDiscussion: NO3ut�ef8UM3are kn0vVDb]t�ve[Sethe a�eand the p jentG�eiS D'-' '-lOC@t-within, or immediate 8di@o8Dt to an AlqUist-Pho\O Earthquake F@.U� Zone. Therefore, Of 8 kDoVVn earthquake fault would not OoCU[ within the project area. Adherence ' tO'standard engineering practices aOddeSignCri[8ri8[B)atiVetoGeiS0io3Odgeo|OgiC hazards in 3CCondaDCe with the California Building Code (CBC) is required. ii) Strong seismic ground shaking? I ( ) -] ( ) I (V) I ( )-.- impact Discussion: Southern California has numerous active and potentially active faults that could produce strong ground shaking that could impact the project site. The City of Diamond Bar is in proximity to the San Andreas and Sierra Madre Fault zone. The California Building Code requires structural design and construction methods that minimize the effects of strong seismic ground shaking. The California Building Code requirements would be applied to the proposed project as standard conditions of project approval. iii) Seismic -related ground failure, including |Oloant Discussion: | �e p[�ecl area IS /ocauUu vvmm/ u pu/uu,` ". "". `"`x ""^` ~ ...^ ~.^v.^~ - liquefaction. Therefore project 'e� implementationoO is not anticipated to [eSUKiDthe exposure of peop-/e o[structures tO potential impacts related to seismic ground failure or liquefaction. Impact Discussion: The proposed project required the submittal and approval of a preliminary geotechnical investigation report. This report, conducted by Cal Land Engineering, Inc., indicated that the project site is suitable for the development of two new single-family residences with the recommendations in the report incorporated into the project's design and job specification. Therefore, the potential for seismically -related landslides is less than significant. b) Result in substantial soil erosion or the loss of Impact DiSnUaaiOD: The largest SoU[oe OT erou/cx/, puIuuu/m/y o/ ":I/ u."=.. U..""=""^..` ~ UOCODtnoUed drainage during CoOetnJcUoD. ErOS0O oOteOUa| dUhOQ coDStnJCtiVO vV0U|d be managed tOthe maximum extent practicable with Best MaO8g80Brd Practices (BMPs). The proposed p-^H[t is required to be CoV8[8d under the National PUUUt8Ot DischargeElimination (NES) General [nOotnUct)oD Permit; therefore construction BKPs vOU|d be implemented on the project site during demolition and oOOSt[UCtiOO activities to 0iOi0iZ8 erosion |DOpa{%e. Implementation^ofthe CoOGtrUotiOD-Pe\8tgd BK8PS would P8dUCe potential construction - related impacts to the 0aXi0U0 extent feasible. The operation of the project site vvoU|d not cause the loss of topsoil or erosion because the site would be landscaped and paved. C) Be located on a geologic unit or soil that is Less Than unstable, or that would become unstable as a Significant Less issues and Supporting Information Sources: Potentially Significant With mitigation Than Significant No or off-site landslide, lateral s�reading, \[DnaDiscussion: NO3ut�ef8UM3are kn0vVDb]t�ve[Sethe a�eand the p jentG�eiS D'-' '-lOC@t-within, or immediate 8di@o8Dt to an AlqUist-Pho\O Earthquake F@.U� Zone. Therefore, Of 8 kDoVVn earthquake fault would not OoCU[ within the project area. Adherence ' tO'standard engineering practices aOddeSignCri[8ri8[B)atiVetoGeiS0io3Odgeo|OgiC hazards in 3CCondaDCe with the California Building Code (CBC) is required. ii) Strong seismic ground shaking? I ( ) -] ( ) I (V) I ( )-.- impact Discussion: Southern California has numerous active and potentially active faults that could produce strong ground shaking that could impact the project site. The City of Diamond Bar is in proximity to the San Andreas and Sierra Madre Fault zone. The California Building Code requires structural design and construction methods that minimize the effects of strong seismic ground shaking. The California Building Code requirements would be applied to the proposed project as standard conditions of project approval. iii) Seismic -related ground failure, including |Oloant Discussion: | �e p[�ecl area IS /ocauUu vvmm/ u pu/uu,` ". "". `"`x ""^` ~ ...^ ~.^v.^~ - liquefaction. Therefore project 'e� implementationoO is not anticipated to [eSUKiDthe exposure of peop-/e o[structures tO potential impacts related to seismic ground failure or liquefaction. Impact Discussion: The proposed project required the submittal and approval of a preliminary geotechnical investigation report. This report, conducted by Cal Land Engineering, Inc., indicated that the project site is suitable for the development of two new single-family residences with the recommendations in the report incorporated into the project's design and job specification. Therefore, the potential for seismically -related landslides is less than significant. b) Result in substantial soil erosion or the loss of Impact DiSnUaaiOD: The largest SoU[oe OT erou/cx/, puIuuu/m/y o/ ":I/ u."=.. U..""=""^..` ~ UOCODtnoUed drainage during CoOetnJcUoD. ErOS0O oOteOUa| dUhOQ coDStnJCtiVO vV0U|d be managed tOthe maximum extent practicable with Best MaO8g80Brd Practices (BMPs). The proposed p-^H[t is required to be CoV8[8d under the National PUUUt8Ot DischargeElimination (NES) General [nOotnUct)oD Permit; therefore construction BKPs vOU|d be implemented on the project site during demolition and oOOSt[UCtiOO activities to 0iOi0iZ8 erosion |DOpa{%e. Implementation^ofthe CoOGtrUotiOD-Pe\8tgd BK8PS would P8dUCe potential construction - related impacts to the 0aXi0U0 extent feasible. The operation of the project site vvoU|d not cause the loss of topsoil or erosion because the site would be landscaped and paved. C) Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in on - or off-site landslide, lateral s�reading, subsidence, liquefaction or collapse? Rev 1-13-17 |DUi8| Study for City of Diamond Bar Tentative Parcel Map No. 72035 (Planning Case No. PL20.16-01). Page 12 |Olooct CiGCUSSk}D: 8Oi| UOd8[ the project Site was oOolYzad in B preliminary geotechnical investigation report. The report indicates that with the recommendations in the report jOCO[pO[@ted into the project's design and job SpeCihC@t)OD. the SUbi8Ct site is suitable for the development Of two new 8iOg|8-f@Dli|y residences. The potential of an on-site and off-site landslide, liquefaction, lateral spreading or collapse is not likely. Further soils investigation will occur prior to the issuance of grading and building permits. The[efO[8, the proposed project would result in less than significant impacts related to development on an unstable soil unit. d) Be located on expansive soil, as defined in Table Less Than V) 1804.2 of the California Building Code (2016), Significant Less Issues and Supporting Information Sources: Potentially Significant VVith Mitigation Than Significant for the disposal of wastewater? Impact Incorporated Impact |Olooct CiGCUSSk}D: 8Oi| UOd8[ the project Site was oOolYzad in B preliminary geotechnical investigation report. The report indicates that with the recommendations in the report jOCO[pO[@ted into the project's design and job SpeCihC@t)OD. the SUbi8Ct site is suitable for the development Of two new 8iOg|8-f@Dli|y residences. The potential of an on-site and off-site landslide, liquefaction, lateral spreading or collapse is not likely. Further soils investigation will occur prior to the issuance of grading and building permits. The[efO[8, the proposed project would result in less than significant impacts related to development on an unstable soil unit. d) Be located on expansive soil, as defined in Table V) 1804.2 of the California Building Code (2016), creating substantial risks to life or property? |0p8ot Discussion: AS described 8bOVe. the project site is stable. 8Oi| under the project Site was investigated and the preliminary geotechnical investigation report indicates that the incorporation Dfrecommendations into the project's dBnigOoDd'ObepecificatiOO`theSUhiecteite iSsuitable for the development Oftwo new single-family residences. Further soils investigation will occur prior to the iSSU8DCe of grading and building permits. Ther8fOns, potential iDlp8CtS from expansive soils would beless than significant. e) Have soils incapable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the disposal of wastewater? |Dlp8Ct [)ieCUSSiOD: The project would be served by the public sewer system, thus there is no impact on soils inadequately capable of supporting the use of septic tanks or alternative waste water disposal SVetaDla. 7. GREENHOUSE GAS EMISSIONS. Would the project: a) Generate greenhouse gas emissions, either directly or indirectly, that may have a significant impact on the environment? Impact Discussion: Many of the world's leading scientific experts agree that greenhouse gases /GHGs\ generated by hUDl@D activities affect diDl8t8 by iDCPeGSiOg the "greenhouse effect." The gases concentrate in the Earth's atmosphere and trap heat by blocking some of the long- wave energy the Earth normally radiates back into space. Human activities that produce GHG8 are the burning of fossil fuels (cO8l. oil and O@tUn@| gas for heating and elect[iCity, g@SO|iOe and diesel for [r8OSpOrt8tiOO); methane from landfill vvooteo and raising livestock, deforestation activities; and some 8griCU|tU[a| practices. These activities are iDcF8gSiDg the gFeeDhOUS8 goS8S iDthe Earth's atmosphere and could be accelerating global climate change. Long-term enVi[OOOleOta| consequences in California could potentially iDC|Ud8 a reduction iDwater supply from the Sierra Nevada snow pack, which COU|d result in 8 reduction in imported vv8te[, and public health problems due to degraded air quality and more intense summer heat. In 2005. in recognition of California's vulnerability to the effects of climate change, then Governor GohwarzeOogge[established Executive Order 8-3-05which net forth the following target dates by which Statewide emission of GHBS VvoU|d be progressively reduced: (1) by Rev 1-13-17 C�vnf[}ia[noDdBar Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) Page 13 |OUO@|QtUdyfO[ City 2010. reduce GHE) emissions to 2000 levels; (7) by 2020, reduce greenhouse gas emissions to 1990 |eV8|S; and /3\ by 2050' reduce GHG emissions to @O percent be|OVV 1990 |eV8|S. In 2006. California passed .he California G|Ob8\ VV8Oning 8O|UtioOS /\Ct of 2008 (Assembly Bill 32 [4B32]; Division 25.5` 8BC�oOS 38500 EtSeq.. H&8[] requiring the Co|�OrOi8Air Resources ' Board /C/\RB\ to design and implement emission |i[DitG. negUlofiDDa. and other DleaaUnBS, such that feasible and cost-effective Statewide GAG erUiSSioDS are reduced to 1980 |8v9|G by 2020 /Pep seOtiOg 8D8ppnJXiDl@t825percent reduction in emissions). |DJune 2OO7. (�/�[�Bdirected �staff tO pursue 37 early actions for reducing GHG e0iSSiOOS UDde[AB32. The broad SpBCt[U0 of strategies to be developed (e.g., low -carbon fuel St8Od8nd. regulations for [8f[iQ8[8Ota with high -global warming pOtenti@\S, gUid@OC8 and protocols for local governments tOfacilitate GHG nBdUCtiODG, and green ports) reflects that the serious threat of climate change requires action 88 soon aSpossible. In addition to approving the GHG [8dUcUOD strategies, C/\RB directed Staff to further RV8|U@te early action recommendations made iOJune 2OO7.The general sentiment 0fCARBsuggested a desire to try to pU�eUe QFB3te[ (��1(� emissions FedUCti0Do in California in the near-term. C/\RB staff evaluated all 48recommendations submitted byseveral stakeholder and several internally - generated staff ideas and published the "Expanded List Of Early Action M888UFeS to Reduce GnaeDhOUS8 Gas ED1iSSioDS in California," recommended for board COOnide[@tiOD in October 2007. Based on its additional 8D8|ySio. CARB staff nBCO00eOded the expansion of the 8@[|y action list to 8 total Of 44 OOe8SUFeS. Nine Of the strategies meet definition Of "discrete early action measures" established under Assembly Bill 32. Discrete early action 0eaaU[eS are DleaaUF8o that were tO be in place and enforceable by January 1, 2010. The discrete early action items include: (1) 8 low -carbon fuel standards for ethanol, biodieae|, hydrogen, electricity, Co[npFeeSHd D@tU[a| gas, liquefied pet[VlBUDl g8G` and biOgoG; /2\ Feot[iCtiODG on high -global VV8rrDiOg potentialrefrigerants; (3) |8Odfi|| OOEth@DB capture; (4) 8Dla[bm@y truck efficiency; /5\ port electrification; (0) reduction Of p8dluOFOCarboOs from the semiconductor industry; (7) reduction of propellants in consumer products; (0) tire inflation; and (9) eU|fU[heX8f|UOhde (SFO) reductions from the non -electricity sector. The 2020 target reductions are currently estimated to be 174 million metric tons of carbon dioxide eqUiV8|8Dt (K8MTCO28). In tDt@|. the FBCD0DleDded early @CtiODS have the potential to reduce GHG eDliSSiODo by at least 42 MMTC{)2e eDliSSioDS by 2020. representing about 25 percent of the estimated [SdUCtioOS needed by 2020. CARB 8doDtedResolution O7-55iODeC8Olb8r2OO7.approving 427K8K8T(�()2e8Sthe Gt8tBVVideGH(� e0i�eiOOo limit for 2D2O. which is equivalent to the 1990 e0iGuiOOS )8Ve|. The 0e@SVnsn are in the sectors of fuels, transportation, fVRaSt[y. @g[iCU|tUF8. edUuetiOD. 8DeFAy efficiency, COOlDle[oi@!, solid waste, o8[D8Ot. Oil and Q8S, electricity, and fire suppression. Global climate change kanot confined tOaparticular project are@andiegeDer3|k/acCBDtedes the consequence of global industrialization over the last 200 years. AtvpiCa| project, even G Very |8[g8 One, does not generate 8OOUgh gr88DhOUoe gas (GHG) e[ni5SiOOS on its OVvD to iROUenC8 Q}ob8| o|i[Dat8 change significantly; hence the issue of global Cli[noha change is, by definition, o CUDlU|EtiVe 8OVinJDDlaOt@| impact. The State of California, through its governor and |ogie|atUna, has established @ nOOUp[eheOSiVe framework for the substantial reduction of GHG emissions over the O8Xt 40-p|US years. This will occur primarily through the" implementation of AB32 and Senate Bill 375 (8B375). which will address GHG emissions on a stotem/ide, cUDlu|mhve basis. NeVerthS|ess, the oUrnanUy proposed project is not expected to generate potentially significant greenhouse gases by subdividing an existing lot for the construction of two Rev 1-13-17 Less Than Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No ImDact I- 2010. reduce GHE) emissions to 2000 levels; (7) by 2020, reduce greenhouse gas emissions to 1990 |eV8|S; and /3\ by 2050' reduce GHG emissions to @O percent be|OVV 1990 |eV8|S. In 2006. California passed .he California G|Ob8\ VV8Oning 8O|UtioOS /\Ct of 2008 (Assembly Bill 32 [4B32]; Division 25.5` 8BC�oOS 38500 EtSeq.. H&8[] requiring the Co|�OrOi8Air Resources ' Board /C/\RB\ to design and implement emission |i[DitG. negUlofiDDa. and other DleaaUnBS, such that feasible and cost-effective Statewide GAG erUiSSioDS are reduced to 1980 |8v9|G by 2020 /Pep seOtiOg 8D8ppnJXiDl@t825percent reduction in emissions). |DJune 2OO7. (�/�[�Bdirected �staff tO pursue 37 early actions for reducing GHG e0iSSiOOS UDde[AB32. The broad SpBCt[U0 of strategies to be developed (e.g., low -carbon fuel St8Od8nd. regulations for [8f[iQ8[8Ota with high -global warming pOtenti@\S, gUid@OC8 and protocols for local governments tOfacilitate GHG nBdUCtiODG, and green ports) reflects that the serious threat of climate change requires action 88 soon aSpossible. In addition to approving the GHG [8dUcUOD strategies, C/\RB directed Staff to further RV8|U@te early action recommendations made iOJune 2OO7.The general sentiment 0fCARBsuggested a desire to try to pU�eUe QFB3te[ (��1(� emissions FedUCti0Do in California in the near-term. C/\RB staff evaluated all 48recommendations submitted byseveral stakeholder and several internally - generated staff ideas and published the "Expanded List Of Early Action M888UFeS to Reduce GnaeDhOUS8 Gas ED1iSSioDS in California," recommended for board COOnide[@tiOD in October 2007. Based on its additional 8D8|ySio. CARB staff nBCO00eOded the expansion of the 8@[|y action list to 8 total Of 44 OOe8SUFeS. Nine Of the strategies meet definition Of "discrete early action measures" established under Assembly Bill 32. Discrete early action 0eaaU[eS are DleaaUF8o that were tO be in place and enforceable by January 1, 2010. The discrete early action items include: (1) 8 low -carbon fuel standards for ethanol, biodieae|, hydrogen, electricity, Co[npFeeSHd D@tU[a| gas, liquefied pet[VlBUDl g8G` and biOgoG; /2\ Feot[iCtiODG on high -global VV8rrDiOg potentialrefrigerants; (3) |8Odfi|| OOEth@DB capture; (4) 8Dla[bm@y truck efficiency; /5\ port electrification; (0) reduction Of p8dluOFOCarboOs from the semiconductor industry; (7) reduction of propellants in consumer products; (0) tire inflation; and (9) eU|fU[heX8f|UOhde (SFO) reductions from the non -electricity sector. The 2020 target reductions are currently estimated to be 174 million metric tons of carbon dioxide eqUiV8|8Dt (K8MTCO28). In tDt@|. the FBCD0DleDded early @CtiODS have the potential to reduce GHG eDliSSiODo by at least 42 MMTC{)2e eDliSSioDS by 2020. representing about 25 percent of the estimated [SdUCtioOS needed by 2020. CARB 8doDtedResolution O7-55iODeC8Olb8r2OO7.approving 427K8K8T(�()2e8Sthe Gt8tBVVideGH(� e0i�eiOOo limit for 2D2O. which is equivalent to the 1990 e0iGuiOOS )8Ve|. The 0e@SVnsn are in the sectors of fuels, transportation, fVRaSt[y. @g[iCU|tUF8. edUuetiOD. 8DeFAy efficiency, COOlDle[oi@!, solid waste, o8[D8Ot. Oil and Q8S, electricity, and fire suppression. Global climate change kanot confined tOaparticular project are@andiegeDer3|k/acCBDtedes the consequence of global industrialization over the last 200 years. AtvpiCa| project, even G Very |8[g8 One, does not generate 8OOUgh gr88DhOUoe gas (GHG) e[ni5SiOOS on its OVvD to iROUenC8 Q}ob8| o|i[Dat8 change significantly; hence the issue of global Cli[noha change is, by definition, o CUDlU|EtiVe 8OVinJDDlaOt@| impact. The State of California, through its governor and |ogie|atUna, has established @ nOOUp[eheOSiVe framework for the substantial reduction of GHG emissions over the O8Xt 40-p|US years. This will occur primarily through the" implementation of AB32 and Senate Bill 375 (8B375). which will address GHG emissions on a stotem/ide, cUDlu|mhve basis. NeVerthS|ess, the oUrnanUy proposed project is not expected to generate potentially significant greenhouse gases by subdividing an existing lot for the construction of two Rev 1-13-17 Initial Study for City OfDiamond Ba[ Tentative Parcel Map No.720315 (Planning Case No. PL2016-01) Page 14 new single-family [8Sid8OC8S. ThR[ef0n3. no new significant iDlp8[tS are @Dt[jp8t8d and DO mitigation measures are necessary at this time. b) Conflict with an applicable plan, policy or Less Than V) regulation adopted for the purpose of reducing Significant Less Issues and Supporting Information Sources: Potentially Significant VVith Mitigation Than Significant No environment through the routine transport, use, Impact Incorporated Impact Impact new single-family [8Sid8OC8S. ThR[ef0n3. no new significant iDlp8[tS are @Dt[jp8t8d and DO mitigation measures are necessary at this time. b) Conflict with an applicable plan, policy or V) regulation adopted for the purpose of reducing V) the emissions of greenhouse gases? V) See response a above. 8. HAZARDS AND WASTE MATERIALS. Would the V) project. V) a) Create a significant hazard to the public or the environment through the routine transport, use, or disposal of hazardous materials? |0pgCt DiSCUSGi0O: The proposed project wDUkj not create @ significant hazard to the public or the environment from the routine transport, use, or disposal of hazardous Dl8teh8|s. GOl8ll 8O8UUOtB of hazardous Dl8t8h8|S may be found in solvents and Ch8rOiC8|S used for cleaning, building Dl8iDt8D8Dce. and landscaping. The Olateh8|S VVOUld be similar to those found in C0nlDlOD household projects or pesticides. Hazardous nnot8h8|S used in construction and operation of the p[OpOS8d project VYOU/d be subject to City. St8t8, and Federal F8gU|etioDG. reducing impacts tO8less than significant level. b) Create a significant hazard to the public or the V) environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the Impact Discussion: The pFODOSed UG8S are not anticipated to [eSVK in the creation of health hazards fDUOVVOg compliance with health and safety regulations. The proposed USeG VVOu|d not use, generate or dispose Of h8Z@PdOUS D0Gteha|a in large quantities. AS stated oboV8. hazardous CD8t8ri8|S used in CODSt[UCtiOO and operation of the proposed project VVoU|d be subject to City, 818te' and Federal regulations, reducing impacts to a |8SG than significant level. C) Emit hazardous emissions or handle hazardous V) or acutely hazardous materials, substances, or waste within 1/4 mile of an existing or proposed |rOoaot DieCUSSOD: The proposed project VV0U|d not involve the transport, use, haDd|iDg, or diGpOS8| of notable quantities of hazardous rOat8[a|s. aside from DODn8| hOUS8hO|d cherOiC8|S and landscaping applications. Therefore, the proposed project would Dot pose 8 health risk to nearby schools, and OO SigDihC8Dt impacts to schools would result from the CODStPUotion and Rev 1-13-17 |DMU@l Study for City of Diamond B8[ Tentative Parcel Map No. 72O35(Planning Case No. PL2018701) .Page 15 d) Be located on a site which is included on a list of V) hazardous materials sites compiled pursuant to Significant Less Issues and Supporting Information Sources: Potentially Significant LLessThan With Mitigation Than Significant No result, would it create a significant hazard to the d) Be located on a site which is included on a list of V) hazardous materials sites compiled pursuant to Government Code Section 65962.5 and, as a result, would it create a significant hazard to the public or the environment? |OOp@Ct DiSQJSSiOD: The project SUB is located within an existing gated residential coOlD1UDitv. SU[n7UDd8d by residential development. The existing USe8 do not use, h8Odh*. or store h@z@PdOUS Dloteha|S. OeV8|OpDleDt Of the proposed project VVmU|d not create 8 SigDU5C8Dt h8ZGPd to the public or to the environment. Therefore OO impacts VV0Uid OCcU[ in this regard. e) For a project located within an airport land use V) plan or, where such a plan has not been adopted, within 2 miles of a public airport or public use airport, would the project result in a safety hazard for people residing or working in the project area? Impact Discussion: The project Site is not located within an airport land use plan or within two Dli|SS of an airport. The nearest airport is Brackett Held Airport, which is approximately 8.2 miles northeast of the project site. No impacts would occur in this regard. For a project within the vicinity of a private V) airstrip, would the project result in a safety hazard for people residing or working in the project area? Impact Discussion: The projectSite is not located within an airport |@Od use plan with within two [Oi|nS of an airport. The nearest airport is Brackett Field Ai[pOrt, which is @pp[OXiDlote|y 8.2 Dli|eS northeast of the project Site. No impacts vVoU|d occur in this regard. g) Impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan? Impact Discussion: Emergency vehicles would continue to have access to project related 8Od SUDoUDdiOg nDodv«ovy upon CDDlp|etiOD of the two new single-family residences. The proposed development Of two new single-family residences VVOU|d not impact access to 8DOe[geOoy PeapODG8. In addition, the proposed d8Ve|OpDl8Ot of two oiOg|8-fGDli|y FeGid8OC8S VvOU|d not place temporary o[permanent barriers on existing roadways O[reconfigure existing roadways. Therefore, no impacts VVUU|d n*sU|t from the CODotrUctiOO and operation Of the proposed development oftwo single-family residences. h) Expose people or structures to a significant risk of loss, injury or death involving wildland fires, including where wildlands are adjacent to urbanized areas or where residences are intermixed with wildlands? |Dlpoot Discussion: Honn8S in The Country Estates are within the High FlP3 Hazard Severity Rev 1-13-17 Initial Study for City ofDiamond Bar Tentative P@[Ce| Map No. 72035 (P|8DDiDg.CGGe No. PL2016-01) Page 16 |eao risk than hODleS abutting vildlgOdS. In 8ddhiOO. afUel [nOdUic@tOD p|@O is required and subject to the review and Gpp[Ovg| of the County Of LOG AOge|an, RP3 Department's Prevention BUPB@U - FOnaet[y Division. 9. HYDROLOGY AND WATER QUALITY. Would the Less Than project.- Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No discharge requirements? Impact Incorporated Impact Impact |eao risk than hODleS abutting vildlgOdS. In 8ddhiOO. afUel [nOdUic@tOD p|@O is required and subject to the review and Gpp[Ovg| of the County Of LOG AOge|an, RP3 Department's Prevention BUPB@U - FOnaet[y Division. 9. HYDROLOGY AND WATER QUALITY. Would the project.- V) a) Violate any water quality standards or waste discharge requirements? {Dlp@Ct 0scVea0O: The proposed project will not be 8ll0vV8d to violate any water quality standards or waste discharge requirements. The State VVato[ Resource Control Board (S\8/RCB) has adopted a National Pollutant Discharge Elimination BVSt8Dl (NP[}EG) General Permit for StO[Dl water discharges 8SSOCi@tRd with coOot[UCtiOD activity. COOlp|i8OCB with Statewide NPDEG General Permit for GtO[0 Water Discharges associated with cOOstFU[tiOO activity which xVOU|d prevent storm VV@te[ pO||UtiOD from impacting VV3t8[S Of the U.G. in the vicinity Ofthe project @reo. will be required. b) Substantially deplete groundwater supplies or interfere substantially with groundwater recharge such that there would be a net deficit in aquifer volume or a lowering of the local groundwater table level (e.g., the production rate of pre- existing nearby wells would drop to a level which would not support existing land uses or planned uses for which permits have been granted)? hnoect Discussion: The proposed project will not be allowed to violate any VVote[ quality St@Ddgndn Or VV8St8 discharge requirements. The State Water Resource COOtnz| Board (SWRCB) has adopted @ National Pollutant Discharge Bi0iO2tiOO 8Vgte0 (NPDEE) General Permit for storm VV@te[ discharges associated with CODstnJCti0O activity. COOlp|i8O08 with Statewide NPDEG General Permit for Storm \8/ate[ [)ieoh8[geS 8GSOCi8ted with COOetrU:tiVO activity which m/oU|d prevent Sto[Ol vv@te[ pollution from impacting waters Of the U.S. in the vicinity of the project area, will be required. C) Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river, in a manner, which would result in substantial erosion or siltation on- or off-site? Impact [}iSCUoSiVO: There are DO StKe80o or rivers nearby. The PUb|iCVVOFhS/EOgiDeehDg Department has reviewed the hydrology report conducted bvT[iteCh Engineering Associates, dated February 24, 2016. which iDC|UdeS supporting hVd[@U|iC and hydrological data. The proposed development will not substantially alter the existing drainage pattern ofthe site O[area in 8 manner which VVOU|d [8Su|t in substantial erosion or siltation on- or off-site. l-h8n3 will also be specific use guidelines for water conservation in the irrigation of planted 8neoa. These guidelines include but not limited to water SeDeorG, programmable irrigation timers, differing water quantity zones, and drought tolerant plants. Rev 1-13-17 Initial Study for City ofDiamond Bar Tentative Parcel Map No. 72O35(Planning Case No. PL2016-01) Page 17 d) Substantially alter the existing drainage pattern of Less Than V) V) the site or area, including through the alteration Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation LIncorporated Than Significant No increase the rate or amount of surface runoff in a Impact Impact Impac' d) Substantially alter the existing drainage pattern of V) V) the site or area, including through the alteration of the course of a stream or river, or substantially increase the rate or amount of surface runoff in a manner, which would result in flooding on- or off - Impact OiScUeSiOO: There are no streams or rivers nearby. The Public VVO )D8enOg Department has reviewed the hydrology report conducted b«T[iteCh Engineering Associates, dated February 24, 2016. which iDC|VdeS supporting hydraulic and hydrological data. The proposed development will not substantially alter the existing drainage pattern Ofthe site Orarea or SUbat@Dti8|lV iDCn98ae the rate Of @[DOUDt of surface runoff in @ manner which VVoU|d result in flooding oD-O[Of-oitB. e) Create or contribute runoff water which would V) exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff? Impact Discussion: See responses Cand dabove. IOtherwise substantially degrade water quality? Impact Discussion: See responses a and b above. g) Place housing within a 100 -year flood hazard V) area as mapped on a Federal Flood Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation map? Impact Discussion: The projectSite is not located within aflOOd zone. /\dU0oOg|k( the City of OiGDlOOd B@[ is not subject to any major flood haz@ndo. or pO1BDti8| iDUDd8tiOD due to nearby de[n failures. Furthermore, the Federal Emergency yN8DagB08Ot Ao8OCy'S (FEMA) Flood |OSU[anCe Rate Map designated the entire City 3Swithin @ Flood Zone "X". Flood Zone ">(" is identified as an area of 0.2 percent 8ODU8l ChoOoe of flood. The proposed project VVOU|d not involve the placement of structures within a 1 00 -year flood hazard area. h) Place within a 100 -year flood hazard area V) structures that would impede or redirect flood including flooding as a result of the failure of a Impact Discussion: See response g above. Expose people or structures to a significant risk of loss, injury or death involving flooding, including flooding as a result of the failure of a levee or dam? Impact Discussion: See response g above. Rev 1-13-17 |Diba| Study for City ofDiamond B@[ Tentative, ParceJ Map No. 72035 (Planning Case No. PI -2016-01) Page 18 Inundation by seiche, tsunami, or mudflow? Impact Discussion: The proposed project site hsapproximately 4Omiles inland from the Pacific Ocean and there are no large bodies Ofwater within the Vi[jDitv of the project site that would CGUGe iDUOd@tinD by SeiCh8, tSUD8DOi' or [OUdOoVV. Th8r8fo[8, no iDlp8[tS would result from the construction and operation Ofthe proposed project. 10. LAND USE AND PLANNING. Would the project. - LessThan (10 a) Physically divide an established community? Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No plan, specific plan, local coastal program, or Impact Incorporated Impact Impact Inundation by seiche, tsunami, or mudflow? Impact Discussion: The proposed project site hsapproximately 4Omiles inland from the Pacific Ocean and there are no large bodies Ofwater within the Vi[jDitv of the project site that would CGUGe iDUOd@tinD by SeiCh8, tSUD8DOi' or [OUdOoVV. Th8r8fo[8, no iDlp8[tS would result from the construction and operation Ofthe proposed project. 10. LAND USE AND PLANNING. Would the project. - (10 a) Physically divide an established community? 0 0 Impact Discussion: The proposed project site VVoU}d not disrupt or ohvnic@|k/ dk/k1e an established CODl[OUDhv. The project Site is located within an existing gated residential community, surrounded by residential development. b) Conflict with any applicable land use plan, policy, (10 or regulation of an agency with jurisdiction over 0 0 the project (including, but not limited to, a general plan, specific plan, local coastal program, or zoning ordinance) adopted for the purpose of avoiding or mitigating an environmental effect? kOp8Ct [}iscUSSiOO: In @cnoPdoDCB with Title 21 of the City Of Dk]DloRd E3a/G K8uDiCipG| COde, the project applicant has requested the 8pp[OV@| of Tentative P8[Ce| Map to subdivide an existing 183'203 square -foot (4.2 aona) gross lot into three lots for the fUtUPB development of eiOg|8-fo[n||y residences on the two O8Vv|y created lots. Once the subdivision is 8ppnDV8d, the applicant will submit 8 Development RBVi8VV application for the 8pp[OV8| Of the project's G[ChiteCtU[8| and Site design. With the 8pp[OV@| of these eDtit|80eOtS, the d8VB|Op0eOt of the proposed project would be in compliance with all applicable City of Diamond E]@['s land use p|8O. policy, and regulations. C) Conflict with any applicable habitat conservation plan or natural community conservation plan? 0 0 Impact Discussion: The proposed project oiteionotiOC|Ud8diDaDyhabitatooOaen/aUoDp|GDOr natural community conservation plan. 11. MINERAL RESOURCES. Would the project: a) Result in the loss of availability of a known 0 0 mineral resource that would be of value to the region and the residents of the State? |Olp@[t OisCUGSkJO: The project site is not identified as 8 site with kDovvO mineral resources that VVOU|d be of value to the F8giOO and the residents of the state. Therefore, the proposed project Rev 1-13-17 |Odjo| Study for City of Diamond Bar Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) Page 19 b) Result in the loss of availability of a locally Less Than V) V) important mineral resource recovery site Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No or other land use plan? Impact Incorporated Impact Impact b) Result in the loss of availability of a locally V) V) important mineral resource recovery site delineated on a local general plan, specific plan or other land use plan? Impact DisCUSSk>O: The proposed projectuiU not [8SUlt in the |OSS of availability of locally - important mineral DC8k+iOlport8DtrOiDe[ai reaOU[CG recovery site delineated OO 8 local general pi8D. specific plan, or other land use plan, because the site contains no known mineral resources. 12. NOISE. Would the project result in: V) a) Exposure of persons to or generation of noise levels in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? Impact Discussion: There will be a temporary increase in noise levels during construction of the hoD18G, but it will not be SUbSt8Ob@l and DlUet FBDl@iD within noise UnodD established by the City. The City of Diamond Bar's K8UOiCip@l Code, Chapter 8.12 Division 3' Section 8.12J20 prohibits construction -related noise between the hours Of7:OOp.0.and 7:OO8.0. Construction activity iS prohibited on Sundays and holidays. Noise from the short-term (less than ten days) Ope[GUOn Of mobile CODst[UctiOD 8qUipD88Dt may not exceed 8 OO8XiDlUDl Of 85 dB. Additionally, the proposed subdivision for the development of two new single-family homes is compatible with the single-family r8Sid8Db8| uses that surround the project site. The proposed use is not expected to exceed noise levels set forth in the WiUOicipo| Code for residential uses. b) Exposure of persons to or generation of V) excessive ground borne vibration or ground borne noise levels? Impact OiSCUS3iOO: Construction 8Ctkjt8S have the potential to create gnDUDdbo[Oevibration aOd/O[gPoUDdbO[Oe OOiS8 l8V8|G. However, any impacts VVOU|d be temporary and of minimal duration. AdditioD8Uy, i0p|80eDtGtiOD of the construction hours N0U|d restrict these activities to daytime hours only. C) A substantial permanent increase in ambient V) noise levels in the project vicinity above levels existing without the project? Impact Discussion: The ambient noise levels will not substantially increase and will be compatible with the noise levels for residential uses in the surrounding area. d) A substantial temporary or periodic increase in ambient noise levels in the project vicinity above levels existing without the project? |DlpeCt Discussion: Construction activities would require the use oftrucks tV bring CODatnJotion [Doteh@|S to the site. which VVuU|d contribute to ambient noise in the project area. The truck noise would be temporary and sporadically distributed throughout the construction activities and Rev 1-13-17 Initial Study for City UfDiamond Bar Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) Page 20 vVOU|d be limited to between the hOU[S of a.m. to 7 p.m. daily eXoBDt Sundays and kso@} e) For a project located within an airport land use Less Than V) plan or, where such a plan has not been adopted, Significant Less Issues and Supporting Information Sources: Potentially Significant VVith Mitigation Than Significant No airport, would the project expose people residing Impact Incorporated Impact Impact vVOU|d be limited to between the hOU[S of a.m. to 7 p.m. daily eXoBDt Sundays and kso@} e) For a project located within an airport land use V) plan or, where such a plan has not been adopted, within 2 miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise |Olp8Ct D|SCUna|OD: CoOstnUCUOO otthe proposed project woU}O O@vS OO |0pacJvvaO [e0oros no airports. The project area is not located within 8.2 Dli|8S of any public airport or within an airport land use plan. Therefore, no impacts would occur. For a project within the vicinity of a private (Y") airstrip, would the project expose people residing or working in the project area to excessive noise homes and businesses) or indirectly (for Impact Discussion: The construction Ofthe proposed project would nave DOimpact with regards to private airstrips. The project area in not located within the Vi[jDUv of a private airstrip. Therefore, no impacts would occur. 13. POPULATION AND HOUSING. Would the project: (Y") a) Induce substantial population growth in an area, either directly (for example, by proposing new homes and businesses) or indirectly (for example, through extension of roads or other |Dloect Discussion: The |Dc[e8S8 of two new single-taDl||y FeGK1eDceS is not e|gOitiC3Dt in the context of the City as 8 vVho|9 or 8VbSt8Otio> for the area. The project site is an eXGUDQ lot with an existing single-family renid8OCB. therefore will not displace hOUSiOQ for SUbSt@Ob@| OuOlbe[S of people as 8 F8SU|t of this project. b) Displace substantial numbers of existing housing, (Y") necessitating the construction of replacement housing elsewhere? Impact Discussion: See response 8above. C) Displace substantial numbers of people, V) necessitating the construction of replacement housing elsewhere? Impact Discussion: See response oabove. Rev 1-13-17 |nkio| Study for City of Diamond Bar Tentative Parcel Map No. 72035 (Planning Case No. PI -2016-01) Page 21 14. PUBLIC SERVICES. Would the project result in Less Than substantial adverse physical impacts associated with the Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant facilities, need for new or physically altered Impact Incorporated Impact 14. PUBLIC SERVICES. Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times or other performance objectives for any of the public a) Fire protection? b) Police protection? C) Schools? d) Parks? e) Other public facilities? |Dlp8Ct DisCUSSiOO 8-e: The DlGFgiO@| increase of two new residential Units from the proposed project are ' U within those anticipated in the City's GeOB[@| P|8O, and would not require the provision of new or altered goVeFODOeDt8| facilities for fire prOtSCtiOD, police proteCtiOO. Sohoo|S. park, or other public facilities. HOVV8Ve[, the applicant is required to pay school fees to the Walnut \/o|)ey Unified School District (VyVUGD) as part of the building permit pnoC8GS in order to help meet the potential funding needs created by the proposed iDCr8@Se in pOpU|8boD. In 8dditiUD, the \&«JU8Dwould receive Average Daily Attendance (ADA) funding for any children attending public schools. 15. RECREATION. Would the project. a) Increase the use of existing neighborhood and regional parks or other recreational facilities such that substantial physical deterioration of the facility would occur or be accelerated? Impact Discussion: The proposed project would not trigger the new construction orexpansion Of recreational facilities. Due to the Dl8rQiO8| iOc[8@S8 Of two new residential units from the proposed project, Ul8Fe may be some increased use of existing neighborhood [8Cr88tioDai fGcilitieS, but it would not be expected to be significant or to migDhiCGDt|y iDC[8aae the physical deterioration Of the facilities. In 8dditioO, the project Site is located within 8 gated residential ConlDlUDity that OffeFG many amenities for their FeSideDts, including a oVvOlDling pool, board P0oOl, club hoUse, no[nrnUOity park, and t8ODiS courts. The property oVVOSrG VVOU|d pay Homeowners Association dues to Ol8iOt8iO the facilities within the Association. AdditinO8||y, the project will be conditioned to pay park fees in accordance with Di8DOODd Be[ K8UOiCip8| Code Section 21.32.O4O.Therefore, impacts would beless than significant. b) Does the project include recreational facilities or require the construction or expansion of recreational facilities, which might have an adverse physical effect on the environment? Rev 1-13-1 Initial Study for City of Diamond B8[ Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) Page 22 Impact Discussion: See response 8above. 16. TRANS PORTATION]TRAF IFIC. Would the project: Less Than a) Conflict with an applicable plan, ordinance or Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No the performance of the circulation system, taking Impact Incorporated Impact Impact Impact Discussion: See response 8above. 16. TRANS PORTATION]TRAF IFIC. Would the project: a) Conflict with an applicable plan, ordinance or V) policy establishing measures of effectiveness for the performance of the circulation system, taking into account all modes of transportation including mass transit and non -motorized travel and relevant components of the circulation system, including but not limited to intersections, streets, highways and freeways, pedestrian and bicycle paths, and mass transit? hnnoct OisCUSGi0D: The increase of two new single-family residences is not SigDUlQaOt and will not cause an increase in traffic which is substantial in PB)8tiOO to the existing traffic |O@d and capacity of the street system. b) Conflict with an applicable congestion management, program, including, but not limited to a level of service standards and travel demand measures, or other standards established by the county congestion management agency for designated roads or highways? Impact Discussion: The iOC[e8S8 of two new single-family residences is not significant and will not exceed existing level of service standards for SU[R}UOdiOg rOodv«avn and intersections established by the County Congestion Management Program Monitoring System. C) Result in a change in air traffic patterns, including either an increase in traffic levels or a change in location that result in substantial safety risks? Impact Discussion: The proposed project will ODt result in 8 Ch8Dg8 in air traffic oette[Ds, including either an iOC[88S8 in traffic |8Ve|S O[8 change in location that results in GUbSt8DU8| safety risks because there is no airport nearby. d) Substantially increase hazards due to a design feature (e.g., sharp curves or dangerous intersections) or incompatible uses (e.g., farm Impact Discussion: The proposed project would not create any hazards due todesign features O[incompatible uses. Access tDthe project SitaVVoUNb8PBqUi[edtOQOOlp|yvvith@UCitvdeeigO e) Result in inadequate emergency access? I () I () I (-/) I ( ) I Impact Discussion: The proposed project would not significantly impact the adequacy of existing and future emergency services. The roadways and driveways are existing and will not Rev 1-13-17 |Dhi8| Study for City of Diamond Bar Tentative Parcel Map No. 72O35(Planning Case No. PL2O1O-01) Page 23 be relocated. The proposed project VVOu|dbecoDG1[UctedeCCOPdiDgh]CUvOfDia0oOdB@[aDd County of Los Angeles [8qUiFeOOeOtS for emergency access. Therefore significant impacts would not result from the construction and operation ofthe proposed project. Conflict with adopted policies, plans, or programs Less Than V) regarding public transit, bicycle, or pedestrian Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No or safety of such facilities. Impact Incorporated Impact Impact be relocated. The proposed project VVOu|dbecoDG1[UctedeCCOPdiDgh]CUvOfDia0oOdB@[aDd County of Los Angeles [8qUiFeOOeOtS for emergency access. Therefore significant impacts would not result from the construction and operation ofthe proposed project. Conflict with adopted policies, plans, or programs V) regarding public transit, bicycle, or pedestrian facilities, or otherwise decrease the performance or safety of such facilities. Impact Discussion: The roadways and driveways are existing and will not be relocated. The proposed projectvvDU|d be constructed @Co0PdiDg to City Of Diamond Bar and County of Los Angeles requirements. Therefore significant impacts would not result from the construction and development Ofthe proposed project. 17. UTILITIES AND SERVICE SYSTEMS. Would the V) or wastewater treatment facilities or expansion of a) Exceed wastewater treatment requirements of the applicable Regional Water Quality Control Impact Discussion: The pPDDOGed project would Oot F88Ult in significant iDD8CtS and VVOU|d not 8XC8ed VV8St8VV8te[ treatment requirements of the applicable Regional Water Quality COOtnD| BV8nd, and VVOU|d have 8 |eog than significant impact OO the need to construct new water or VV8st8vv8ter treatment facilities or expansion of existing facilities. Additionally, the COUDtv Sanitation Districts of Los Angeles {|OUOty reviewed the proposed project and in 8 C0[FeapoOdeOC8 dated January 20, 2018 states it is prepared to provide wastewater service to this project. The VV8|Out Ve||8y VVote[ District also reviewed the proposed project and in 8 correspondence dated January 20, 2016 St@t8a it is prepared to provide water service tothis b) Require or result in the construction of new water V) or wastewater treatment facilities or expansion of existing facilities, the construction of which could cause significant environmental effects? Impact Discussion: See response a above. C) Require or result in the construction of new storm V) water drainage facilities or expansion of existing facilities, the construction of which could cause significant environmental effects? Impact Discussion: The proposed project would DOfnaoult in significant impact on the need to Rev 1-13-17 Initial Study for City of Diamond Ba[ Tentative Parcel Map NO. 72035 (P|8DDiDg Case No. PL2016-01) Page 24 d) Have sufficient water supplies available to serve Less Than V) the project from existing entitlements and Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No the project's projected demand in addition to the Impact Incorporated Impact Impact d) Have sufficient water supplies available to serve V) the project from existing entitlements and resources, or are new or expanded entitlements the project's projected demand in addition to the Impact >iSCUg0iOD: /\Spreviously discussed iD@and babove, the proposed project VVOUldhaVe sufficient water supplies available to serve the project from existing entitlements and resources. e) Result in a determination by the wastewater V) treatment provider, which serves or may serve the project that it has adequate capacity to serve the project's projected demand in addition to the provider's existing commitments? Impact OiSCugeiOD: The County Sanitation Districts of LOS Angeles County [eVeVVBd the proposed project and in 8 Co[neepODd8D0e dated J8DU@[y 20. 2016 states it is p[8p@[8d to provide wastewater service tothis project. f)l Be served by a landfill with sufficient permitted V) capacity to accommodate the project's solid waste disposal needs? |O0pGCt Discussion: Refuse and recycling SSn/Ce is provided by Waste KAGDGgeDlent Inc. for single-family F8eideDbG| developments. The Co[npoDy h8U|S DOO-Reoyo|8b|e solid VVoSt8 to the Puente Hills Landfill. This facility has enough capacity to accept solid waste until the year 2020, 8CCO[diOg to the disposal company. All solid VV8StS Dl@te[ia|e generated at the project site VVOU|d be disposed of in 8CCOnd3OCe with applicable state, federal, and |DCa| ot8tUtaS and [8QU|8tioDo. g) Comply with Federal, State, and local statutes and regulations related to solid waste? Impact Discussion: See response fabove. 18. MANDATORY FINDINGS OF SIGNIFICANCE a) Does the project have the potential to degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, reduce the number or restrict the range of a rare or endangered plant or animal, or eliminate important examples of the major periods of California history or prehistory? Impact OieoUSSiOO: The projectsit8dOeoDotooDt8iDUleh@bitatofofiohO[wi|d|ifespecjenand therefore construction of the proposed project would OOt o8USe o fish or wildlife population to drop below self-sustaining |eve|e, threaten to 8|iDliO8te a plant Or 8OiDl@| oVDlDlUDhy. or nedUCa Rev 1-13-17 |OUi8| Study for City of Diamond Bar Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01) Page 25 p[ODOSed project is not anticipated to eliminate 8XeDlpleS of major periods of California history or prehistory. b) Does the project have impacts that are Less Than V) individually limited, but cumulatively Significant Less Issues and Supporting Information Sources: Potentially Significant With Mitigation Than Significant No means that the incremental 'effects of a project Impact _ Incorporated Impact Impact p[ODOSed project is not anticipated to eliminate 8XeDlpleS of major periods of California history or prehistory. b) Does the project have impacts that are V) individually limited, but cumulatively considerable? ("Cumulatively considerable" means that the incremental 'effects of a project are considerable when viewed in connection with the effects of past projects, the effects of other current projects, and the effects of probable future projects)? |Dlnoot Discussion: The cumulatively CoDakje[8ble iDlp8CtS of the individually limited project are not expected tObBsignificant and are iDkeeping with the long-range considerations Ofthe City's General Plan. With the mitigation DlegoU[B and conditions Ofproject @pproVa|. the cUOlUi8ti0e impact of the individually limited project iDlp8CtS will not be CODSid8r8b|B. C) Does the project have environmental effects that V) will cause substantial adverse effects on human beings, either directly or indirectly? |OlDgCt Discussion: SUbot8Dtha| direct orindirect adverse environmental effects on human beings can be expected from this project. Rev 1-13-17 With the mitigation DO8a8Wne and conditions Of project 8pp[oV@|. DO Initial Study for City ofDiamond Bar Tentative Parcel Map No. 72035 (Planning Case No. PL2016-01\ Page 26 1 . General Plan of the City of Diamond Bar adopted July 25, 1995 2. General Plan of the City of Diamond Bar, Environmental Impact Report and Addendum dated July 25.19S5 3. General Plan Update of the City of Diamond Bar, Draft Existing Conditions Report Volume III dated January 2O17 4. Municipal Code, City of Diamond Bar 5. Tentative Parcel Map No. 72D35 8. Architectural and Historical Significance Aaeone0eOt prepared by Archaeological Associates Dated August 8, 2016 7. Geotechnical Investigation prepared by Cal Land Engineering, Inc. dbo Qu8rteCh Consultants Dated March 2.2O18 O. Hydrology Report prepared hxT[iteChEngineering Associates Dated February 24.2O1S 8. Letter from Gobhe}eho Band of Mission |DdiGDS (Kbh Nation) Tribe Dated December 1, 2016 10. All dOcUnO8Oto Cited above are available for review at the City Of 0gDlODd Bar, CODODOUOUv O8Ve|OpDl8Dt Oep@rtDl8OL 21810 Copley [Jrk/H, Diamond Bar, CA 91765. The office hours are Monday through Thursday between 7:30 8.0. and 5:30 p.0.. and Friday between 7:3O8.Dl. and 4:30 p.m. Rev 1-13-17 Cl til C) CN —j a. 6 z to U) cu tu EL, O CSB tc) It - 6 z CL cts Le ttr ct U) W ui F - w -i a - O W O .2 0)0) cz C: ( D ui W U- 0 Z 0 Z LD C: Q) 0 < W F- -i w C) F- o = = m 0 C.) o > LL LL W z < p 0 26 75 0 U) CD U) W a) r- C)) C: 0 U) 0 -Ncf U) o c 0 Z F) U- W C C: U) > 0) a) U c c 01 a) E z 0 1.- C) (D G) 0 E c) a) a) E a) a) Z o) (L) tf 0 CL z 0-.— c 0 0 r- o ca 0) cn E D 0) U) 0 w 0- -2 < (D C: U) C: U) > Lli cn a cQ c n q a) U) > ui < -0 ui :5 a) Co ca :D (D (D E v -o cu U) C? 0 :R C) co 0 U) 0 0) cu C) o u) Ea) 0- C: ca M 0 0 w D E (D LO U) CD cn a) a) > 76 -0 m I,- W (D 0 (D -0 0) 0) < z a (Do cu C) 0 — -(D C) 0 0 CL F- < 0 - co U) 0 cts cu p m 0 0) 0 0 ca U LO C) 0 r U) cr) a) 0 -0 CDCL E ito -0 CD E 0 a) --r C: C) a) cu C: L w a) -0> C5 z cf; M." w C < (D a) 2 > 0 a) =m -0 E w CU 2 CO Z 5 6i < ED -0 0 - c 0 CD 0) 0- o a) < 0 -0— a) m E E > t 2 0 p cu _j (D > (D M n m X Lij Ll, F- 0 0 C) < (L � a) a- (L N Co. 71VOMIT I =jr?"' 171,11,79;rS**flrr�"\IL�-C,=.�759L,"��o'l'�'j WfITT' OF CALIFORNIA BICENTENNIAL HOME LOCATED AT 22702 TIMBERTOP LANE9 CITY OF D]AMOND BAR, LOS ANGELES COUNTY Submitted to: Mayuko Nakajima, Associate Planner Community Development Department Planning Division City of Diamond Bar 21810 Copley Drive Diamond Bar, CA 91765 Prepared by: Robert S. White Richard Guttenberg, M.A., RPA Johanna Marty. M.A., RPA Archaeological Associates P.O. Box 180 Sun City, CA 92586 Tel: (951) 244-1783 Fax: (951) 244-0084 Tentative Parcel Map 72035 APN 8713-028-012 Final August, 2016 P.O. Box 180 Sun City, CA 92586 Tel: (951) 244-1783 Fax: (951) 244-0084 email: archaeological associates@hotnail.com Author(s): Robert S. White, Johanna Marry, M.A., RPA, and Richard Guttenberg, M.A., RPA Consulting Firm: Archaeological Associates P.O. Box 180 Sun City, CA 92586 Tel (951) 244-1783 Fax (951) 367-0117 Report Date: August, 2016 Report Title: Architectural and Historical Significance Assessment of California Bicentennial Home located at 22702 Timbertop Lane, City of Diamond Bar, Los Angeles County .Prepared for: Community Development Department Planning Division City of Diamond Bar 21810 Copley Drive Diamond Bar, CA 91765 Contact: Mayuko Nakajima, Associate Planner USGS Quadrangle: Yorba Linda 7.5, California Study Area: Section 21, Township 2 South, Range 9 West, SBBM Keywords: Evaluation, California Bicentennial Home, City of Diamond Bar, Los Angeles County i 1*131300 013 1 Management Summary. I. INTRODUCTION Il. STUDY AREA LOCATION AND ENVIRONMENT 111. A BRIEF HISTORICAL SKETCH OF DIAMONI) BAR IV. FIELD SURVEY V. CALIFORNIA BICENTENNIAL HOME DESIGN TEAM VI. PHYSICAL DESCRIPTION OF CALIFORNIA BICENTENNIAL HOME VII. RESOURCE EVALUATION VIII. CONCLUSIONS AND RECOMMENDATIONS REFERENCES CITED FRI 3-ID1,22 I �11=-- Figure I. Regional location of the project area as indicated. on a portion of the Los Angeles USGS 1:100,000 scale Topographic Map. Figure 2. Study area as shown on a portion of the Yorba Linda. 7.5'USGS Topographic Quadrangle. Figure 3. Aerial photogrph of California Bicentennial Home Figure 4. Site Plan as shown on TPM 72035. Page iv I I 4 9 10 13 15 17 19 Page 2 3 5 6 LIST OF PLATES Page Plate I. Top: Hillside house featured in Arts and Architecture, 20 July 1962. Photo by Leland Yee. Bottom: Franks House illuminated at night. © J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). Plate H. Top: Oblique view of Franks House. © J. Paul Getty Trust. 21 Getty Research Institute, Los Angeles (2004.R.10). Bottom: Upslope view of Franks House. © J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). Plate III. Top: Toland House, San Clemente. © J. Paul Getty Trust. 22 Getty Research Institute, Los Angeles (2004.R.10). Bottom: Toland House, San Clemente. © J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). Plate IV. Top: Reflecting Pool at the Toland House. © J. Paul Getty 23 Trust. Getty Research Institute, Los Angeles (2004.R.10). Bottom: Hummel House on foundation supports. © J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). Plate V. Top: Side view of Hummel House. D J. Paul Getty Trust. 24 Getty Research Institute, Los Angeles (2004.R.10). Bottom: Decorative roof elements used on Hummel House. © J. Paul Getty Trust.Getty Research Institute, Los Angeles (2004.R.10). Plate VI. Top: Oblique view (looking northeast) of the west elevation 25 of California Bicentennial Home. Bottom: Southeasterly view of the north half of the west elevation (Note the reflecting pool/swimming pool similar to that used at the Toland House. Plate VII. Top: Northeasterly view of a portion of the west elevation of 26 California Bicentennial Home showing picture window detail. Bottom: Southwesterly view of the north elevation (shed -roof extension at bottom appears to be an addition). Plate VIII. Top: South elevation of California Bicentennial Home 27 showing garage entry, slit windows and second floor sun porch. Bottom: Decorative ramada roof treatment attached to the southwest house corner similar to those used on the Hummel House. Plate IX. Top: Oblique view looking northwest along the east elevation . 28 of California Bicentennial Home. Bottom: Main entryway centrally located on the east elevation flanked by rock walls. ill � �, f •, � V � , I '� III '� II '� I �� t'' 1 At the request of the Community Development Department, Planning Division, City of Diamond Bar, Archaeological Associates has undertaken a California Register of Historical Resources (CRHR) evaluation of the residence locally known as California Bicentennial Home. It is located within the corporate boundary of the City of Diamond Bar at 22702 Timbertop Lane in an upscale residential section of the City known as "The Country". Presently is it desired to split the 4.2 -acre parcel into three lots and build two additional custom homes. The existing home on the property will remain. The purpose of this study was to determine if California Bicentennial Home (constructed circa 1969) is architecturally or historically important pursuant to the California Environmental Quality Act,(CEQA) criteria. The architectural/historical analysis of the residence indicates that it was one of three showcase homes designed and constructed for the sole purpose of promoting custom home development in the "The Country". In 1970, The Country, was a new Transamerica Development Company recreational -residential planned development with an equestrian theme. Research and analysis has indicated that the residence appears eligible for the CRHR under Criterion 2 due to association with noted southern California architect Raul Garduno. Additionally, the home appears eligible for local listing only under Criterion 3 as it is important to the City of Diamond Bar. It does not appear eligible, either at the state level or locally, under Criteria 1 or 4. As a matter of course, a Primary Record form (DPR 523 series) reflecting the current status of California Bicentennial Home will be submitted to the South Central Coastal Information Center at California State University Fullerton. As current plans call for the preservation of California Bicentennial "Home, no additional mitigation measures are recommended in conjunction with historical resources. In the event that preservation becomes infeasible, it is recommended that a Historic American Building Survey and Historic American Engineering Record (HABS/HAER) program be undertaken prior to demolition. The photography, drawings and report should comply as closely as practical with National Park Service requirements for HABS/HAER programs at the local level. iv II�i1CY'YZ�]Ilhilill��i[�711 The following report was written by Archaeological Associates at the request of the Community Development Department, Planning Division, City of Diamond Bar. It describes the results of an architectural and historical evaluation of the residence locally known as California Bicentennial Home. The building is located in the area of the City known as "The Country" and carries the address of 22702 Timbertop Lane (APN 8713-028-012). Current plans call for subdividing the 4.2 -acre parcel into three parcels for the purpose of constructing two additional houses. The existing residence, constructed circa 1969, will remain. The study described herein was conducted in accordance with the California Environmental Quality Act (CEQA) as it pertains to the management of cultural resources. The purpose of the evaluation was to establish the architectural and historical significance of California Bicentennial Home which is over 45 years of age. This information is needed since adoption of the proposed subdivision plan could result in adverse effects upon the building. Personnel participating in the study included Richard Guttenberg, M.A., RPA, Johanna Marty, M.A., RPA and Robert S. White. Our evaluation consisted of: (1) literature review, (2) archival research, (3) architectural and historical analysis, and (4) narrative report. III i 1' � '' �1, � i i � ! ,h �\�� ;• '� �11�1' \ y Regionally, the residence lies in the eastern San Gabriel Valley within the City of Diamond Bar east of the 57 freeway and southeast of the 60 freeway, Los Angeles County (fig. 1). Brea Canyon lies to the northwest as does Tonner Canyon to the southeast. The San Bernardino and Orange County boundaries are located approximately 1 -mile to the east and south, respectively. This area of the City of Diamond Bar represents the interface of the Puente/Chino Hills. Consequently, the terrain is quite varied comprising, ridgelines, hilltops, swales and small valleys. Specifically, the study area is located in an upscale, gated community known as The Country at the cul-de-sac of Timbertop Lane (22702 Timbertop Lane). Legally, the building is situated in the Southeast 1/4 of the Northeast 1/4 of the Southeast 1/4 of Section 21, Township 2 South, Range 9 West, San Bernardino Base Meridian (SBBM) as shown on a portion of the Yorba Linda 7.5' USGS Topographic Quadrangle (figs. 2 & 3). 1 'C rrq d,12 • d 'f4,5 ' `s tia d r 5 1f 5 J{ e `.y '� at � ;`*� d � �, :.. � ..•+.-,�,�... a �}n � ice' fee 1 r,( 5.f2 -•s yl^'�,_,,.,W a �' r r 9 t o ' '� �� } `,u ��•'' s-ti t�, . � 7 1 � ..''�•.,., �•.,a ph1�, r '.,.vl . a -� ,�;� . �. ="3.-: �s9'r rre6 " 'z, a- { . � �' � � ,. <..w'.i- � Q �•, �. 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S � `. �..� 9'�- _A. 1a. � ...J 8 O� M l �, t ? ..� 4� iP -i t•a '- ;t,; �+ •',ice^' yR1 s �"� t".-�.'-c � � � : r fi .,__ tt�'' „sem--y �' l� '. � � f�, �•r � ' �,, ' 7 i 3 V t � � '.^' �'� FJ, i 4 ! a•�A i f'•r.. ! J ,r a� r �.•• r g ^ '#� i : ! I c a a ( dr ti 1 pl p f w S��ylo. r., J n_ � � _ %.y�'� f{,., � �•,, r r t ! �pe..I'R "- llc fi ��,.� .., f ' .� � moi' � �-_tial.' tip �.1 4 ( .'•,�E•�=.J' 'y. 1 _ /,f td, C v (r '�y Y � 4 '_ � � � ; l'' � } I� 0 1 �t �v""-! • t 1 `o a---•..�'qqa i f 7,'`"' a i' �'1 �� ,,,:s I • � '. 1 >� ' . � �', ' ��' � ,E r`�'� .'` � ,�„r,,.:-y. y 8 .,.d'1 j y i � r'k n , ,l� f r , ,,�, - i ,.f 1A1� �'�'�}f .r� f)b�T 4 a �9 'Ytil � '... j� ! �•`� . S'a'—' '6 i .rr W � � � �� Y�� 1y ! 1� � � 's t a �.i�' }. fwd ti� q•�`f '_. - �♦ 'dr. '`tiV � \, �..� s ti� �.�° fy,.,r'':. %` .. r.,-,_- � ,y,.i f1 T j +^ _.r^ ' at, �`,�. 'r "N a d ' $ ry+•r17' � ^/"•��, f `At•i - ., r - 1Vs -' a".�'^ S ., q �C, r tia,a S LY✓'r A'=, �! �!.•'--,.� ,y ,S `-•.._�. ., ,. •,'i r' •�,•-~-.• .-�tS. <.; ;I �, `%,''yA�'t. �} y*.. ,�. ,�" ;,� '�•� iL` �,..�.'r`"`-�''"a�q'gd.'' }.tea, � it•�°^ � �I ."-r^" \,,,.�� :-.' ♦ ,...r;. -, 4 f 1 i,�„ , t �•. �.3 "`1-1r*3'l /f �. ✓ � -5 Y � 1 '"1 ! Q JJ zv V •-1. L 1 S,-' r rT -.� _ 'T•..,� a P fi .,_J, t� " _ f7 d �••,, d \ �,. J fr !.-C 1 -'-�y '�''`.�. ^. - ,J.. i •''14,3` d ,� t i �` wit � � �� J IJ�+'—.f i � S % 4 ��� � h. z,•�i� {1Y j i ?r �°j n s 1 WL low ICE 1 0 _ 1py3R'C�ii1S ]Figure 2. Study area plotted on a portion of the USGS Yorba Linda 7.5' Topographic Quadrangle (1966, photorevised 1981). 3 A. Rancho Days Mission San Gabriel was the first European settlement in the Los Angeles basin established sometime around 1776. The Mission grazed livestock and farmland extended as far as the hills and valleys of present day Diamond Bar. After Mexico gained independence from Spain in 1821, a movement to reduce Spanish power began. This included secularization of the missions in 1830, and the issuance of land grants. The first land grant in the Pomona Valley was issued on April 15, 1837 when Mexican governor Juan Bautista Alvarado conveyed a 22,000 -acre parcel of land to California natives Ygnancio Palomares and Ricordo Vejar. Through an informal agreement, Palomares and Veja each took half of their new grant which they had dubbed Rancho San Jose. Palomares took the northern section of the rancho settling in the area of present day Pomona. Viejar occupied the southern portion of the grant in the area immediately south of Pomona and Brea Canyon (Diamond Bar 213). The entire rancho spanned the current sites of the cities of Pomona, Claremont, San Dimas, La Verne, and Glendora (Diamond Bar 214). In 1840, a second land grant was deeded to Jose de la Luz Linares, containing approximately 1,004 acres south of San Jose Creek. This property, which Linares named Rancho Los Nogales (Ranch of the Walnut Trees), is the current location of the city of Diamond Bar (Diamond Bar 60). After Linares' death in 1847, his widow, Maria sold a portion to Vejar, who owned the adjacent ranch. Over the next decade, Vejar and his sons obtained possession of the entire original Los Nogales land grant, increasing his land holdings to more than 13,000 acres. Land rich but cash poor like many other rancho owners, Vejar resorted to borrowing money to feed his cattle and keep his land. Despite mortgaging his land, Vejar was unable to repay the loan. B. End of the Rancho Period In 1864, Vejar's land passed to the ownership of the merchants (Diamond Bar 60). Merchants soon sold the land and everything on it for $30,000 to a livestock trainer named Louis Phillips: Phillips parceled large portions of the former ranchos over the next several years, selling the land to settlers form the South who were seeking escape from the devastation of the Civil War (Diamond Bar 77). 0 Figure 3. Study area as shown on aerial photograph. R d 13H J Ilk 'ZI Figure 4. Site Plan as shown on TPM72035. 6 L Figure 4. Site Plan as shown on TPM72035. 6 In the town of Spadra, the first settler to whom Louis Phillips sold a portion of rancho San Jose was William "Uncle Billy" Rubottom. Soon after, Rubottom opened a hotel and tavern which became a regular stop for the Butterfield Stagecoach. By 1870, the area boasted three stores, two blacksmith shops, warehouses (for shopping via the railroad), a school, and a post office. Rubottom was an Arkansas native and named the growing community of Spadra after his hometown. Although Spadra began as a thriving community, the introduction and expansion of the railroads, along with the incorporation of the city of Pomona in 1888 led to the demise of the town (Diamond Bar 258) In 1918, Frederick Lewis bought 7800 acres of "choice land" near the town of Spadra, about 30 miles east of Los Angeles. The primary focus of the Diamond Bar Ranch was the establishment of a Durac-Jersey hog breeding operation. In 1920, Lewis and another hog farmer, A.B. Miller of Fontana, decided that garbage would be a more cost effective food source than grain, securing a garbage hauling contract from the City of Los Angeles (Diamond Bar 77). Diamond Bar ranch quickly earned a reputation as breeders of high quality champions. Lewis also bred Arabian horses on the Diamond Bar ranch, initially purchasing 10 horses from Peter Bradley in Massachusetts. Peter Bradley is credited with financing a significant importation in 1906, when Homer Davenport received permission from the Sultan of Turkey to export Arabian horses. Over the course of nine years, 50 registered Davenport Arabians, who could be traced to the original importation, were bred on the Diamond Bar Ranch (Diamond Bar 95). In 1943, Lewis sold his ranch to William Bartholomae, president of Batholomae Oil Corporation of Fullerton (Diamond Bar 95). "Bartholomae, a millionaire with movie star good looks, spent 13 years overseeing 3,000 purebred Hereford cattle on his vast property" (Diamond Bar 95). "The significant acreage of open land under single ownership and its isolation from other cities but proximity to industrial areas made it an ideal site for a master -planned community" (Diamond Bar 470). C Modern Period -Transamerica Corporation In 1956, Capital Company- a real estate and oil development subsidiary of the Transamerica Corporation- purchased the 7,800 -acre ranch from William Bartholomae for $10 million." (Diamond Bar 470). Promptly after adopting the master plan in 1958, the Transamerica Corporation began installation of utilities and infrastructure, including the potable 7 water network and the formation of the Diamond Bar Water Company. In 1959, a 4,700 -foot - long -water pipeline was installed beneath Diamond Bar Boulevard (Diamond Bar 470). Once other primary improvements were in place, Capital Company began selling parcels in various sizes to other builders and focusing on other aspects of the master plan, including roadways, shopping areas, recreational and educational facilities. The plan called for a network of roads to emanate from a single highway; a business district at the center of town, as well as two shopping centers in outlying areas (Diamond Bar 470). Recreation facilities outlined in the plan included an 18 -hole golf course in addition to several parks. The Diamond Bar Development Company (A Transamerica Corporation subsidiary) took over administration of the property in 1959 (Diamond Bar 486). While development was already well underway, momentum increased and commercial, residential, and commercial building activity accelerated under this new management. The first planned homes were built in 1960 in the northern part of town. The Transamerica Development Company oversaw development until it sold its last real estate holdings in 1986 (Diamond Bar 486). Diamond Bar's wide open spaces and isolation from other cities yet close proximity to business and industrial centers were the prime marketing tools employed by Capital Company to entice potential buyers to leave metropolitan areas for "country living" (Diamond Bar 497). Westwood Ranchos was the first development where homes sold, and later Golden Springs Estates. D. The Country In 1970, development began for a large gated community known as Equestrian Estates, later changed to "Country Estates, featuring custom home sites ranging in size from half acre to two -and -a -half acres, as well as permanent riding trails and equestrian facilities". "The Country" was the brainchild of the Transamerica Development Company whose intent was to create an exclusive recreational -residential community in the rolling hills of Diamond Bar (Independent Press Telegram 1970). The Country development also featured "the nation's largest private covered horse show arena, with stable, four outdoor rings, a 150 -acre recreation park, a tennis club, and several satellite recreation centers" (Diamond Bar 653). To promote the development, Transamerica commissioned the design and construction of three exhibit residences by architects Raul Garduno, Garduno Design Associates of Los Angeles, 8 ki Barry Berkus, B.A. Berkus Associates of Los Angeles and Lee Wilcox A.I.A., of Garden Grove (Progress Bulletin 1969). The residence known as "California Bicentennial Home" was designed by architect Raul Garduno who specialized in challenging hillside projects, primarily in Los Angeles. The home took the name from the California Bicentennial Celebration Commission who authorized the designation of the house as "California Bicentennial Home" (Independent Press Telegram 1970). In essence, the house was said to acknowledge those who have made significant contributions to the "good way of life". It is unknown if California Bicentennial Home or the other two exhibit residences sparked significant interest in new construction within The Country in the early 1970s. However, Transamerica's vision has been achieved as The Country has matured into a very exclusive enclave in the City. E. A New City The first government organization, the Diamond Bar Homeowner's Association was formed by property owners in in 1960. As the population grew, the desire for local control and community identity also increased, leading to the formation of the Diamond Bar Municipal Advisory Council (MAC) in 1976. MAC served as a community watch dog, assisting with traffic regulation, safety, parks and recreation, and zoning. The 1980s saw a jump in population of over 50 percent and ongoing discussion about the feasibility of incorporation. The debate finally came to an end on March 7, 1989, when voters approved an incorporation measure, securing Diamond Bar the 86th spot on the register of Los Angeles County Cities (Diamond Bar 729). With incorporation, the Diamond Bar Homeowners Association saw its role and influence grow to include education and enforcement of Transamerica's county approved property maintenance guidelines and preparation of a proposal to create a Municipal Advisory Council (Diamond Bar 745). IV. FIEELD SURVEY A field survey of the project site took place in February and March, 2016. Field personnel included Richard Guttenberg, M.A., Johanna Marty, M.A., and Robert S. White. The intensive survey was conducted by thoroughly examining the built environment within the project boundaries (fig. 4). This included an examination of the existing residence (Bicentennial Home). Ge Ancillary structures on the property that were not part of the assessment comprise a large stable that is purely ubiquitous in nature. The stable appears contemporaneous with the house but clearly was constructed/adapted from standardized plans for such outbuildings. It does not share any of the architectural or design elements found in the house. Field notes and photographs focused on the exterior of the circa 1969 building. Using this information, Department of Parks and Recreation (DPR) 523 series forms are being compiled for the building under evaluation. V. CALIEFORN1 A BICENTENNIAL HOME DESIGN TEAM A. Architect Raul F. Garduno, Garduno Design Associates of Los Angeles Raul Garduno grew up in Los Angeles and came from a long line of doctors (Head 2015). He began his university education as an engineering student at Loyola Marymount University, later studying architecture at USC, graduating in 1960. Garduno designed his first home while working in the office of architect Ragnar Qvale. He eventually left the firm to complete the house and start his own practice. Garduno was best known for his Modernist (Mid -Century) residential work. Garduno specialized in the construction of challenging hillside properties. His first two homes (similar post and beam design) are next door to one another at 1954 and 1956 Lucile Dr. in the Los Angeles neighborhood of Silver Lake. As the story goes, Garduno and associate Peter Heisler designed the Fleming Drefeld House (1956 Lucile Dr.) for a Los Angeles Times typesetter (Drefeld) who commissioned the home in 1961 (Plate I Top). Also known as "Hillside House" it has been photographed by Leland Yee, and featured in Arts and Architecture magazine (1962). The Fleming Drefeld House was featured in an article entitled, "Hillside House on an Anchor of Steel" in the Home Section of the Los Angeles Times on July 22, 1962. With views and afternoon breezes in mind, the house featured open-air, steel, glass, post and beam design allowing for stunning views of the hillsides, and vistas of the Hollywood Sign and Griffith Park Observatory. The house cantilevers from the hillside; has floor to ceiling glass panels, a prefabricated barrel vaulted ceiling, and approximately 500 feet of decks surround the home (O' Conner 2015). 10 Perhaps his most recognized house, Garduno and Rick Farber designed the Franks House - in 1966 (located at 1249 N. Tigertail Road in the Crestwood Hills neighborhood of Brentwood). The Franks House is a 2,506 square foot home featuring a loft -style arrangement with incredible views, multiple decks, a koi pond, walls of glass and a floating staircase ( Plate I Top, Plate 3) The Franks House is included as one of many significant examples of Mid -Century Modern architecture identified in the Brentwood -Pacific Palisades survey area by the Survey La Project (HRG 2013:58). Other examples of Mid -Century Modern architecture were often located in hillside neighborhoods where they take advantage of sweeping canyon and city views. Many represented the work of noted architects, including Richard Neutra, Lloyd Wright, Buff & Hensman, Ain Johnson & Day, Raymond Kappe, Rex Lotery, Craig Ellwood, Rodney Walker, Palmer & Krisel, A. Quincy Jones, Harry Gesner, Thornton Abell, Wurster Bernardi & Emmons, Paul Laszlo, Douglas Honnold, Pierre Koenig, Richard Dorman, and Paul Sterling Hoag (ibid). Garduno also went on to design "House 66", a showcase residence in Carbon Canyon near Pomona which attracted prospective homebuyers with features such as a large Japanese Black pine tree and garden of ferns growing below a skylight in the living room and a waterfall near the entrance. Garduno's design makes use of wood, concrete with exposed aggregate, and tile to impart a feeling of spaciousness, while retaining a sense of warmth (Desert Sun 1967). Garduno's ex-wife, Barbara Jean Trembley told photographer Michael Locke, "Pete (Peter Heiser) was a school friend of mine, and fraternity brother to Raul at USC; we were introduced at a jazz concert in the valley. We were married in January 1959, I was sixteen years old, he was twenty. To finance buying the Lucile Avenue lots, Pete sold his Corvette, a graduation gift from his grandmother. Pete was also responsible for promoting Raul to John Entenza of Arts & Architecture which led to the publication of the first house designed by Raul" (Locke 2014). Julius Shulman, 1910-2009, was an active architectural photographer from 1936 until 1986. The Getty maintains an archive of photographs representing his career. The archive documents the modern movement in architecture spanning several decades and serves as a historical record of the Southern California landscape. Shulman's prolific career has helped to promote and broaden the knowledge of modern architecture by the thoughtful manner which he conveyed architectural design. Images of three homes designed by Garduno can be found in Series IV of Shulman's archive: the Franks home in Brentwood, designed by Garduno and 11 Farber in 1966; The Toland House in San Clemente (Plate III, Plate IV Top); and the Hummel House in Los Angeles (Plate IV Bottom, Plate 5). Garduno's California Bicentennial Home served as inspiration for architect Louis Sumner Winn's (1928-2000) design of the G. Blake and Gail K. Alexander House in Durham, North Carolina. Designed by Winn and built by C.S. Witt in 1974, the 5,261 square -foot home features a stucco fmish, authentic Mexican Saltillo tiles and tile accents and is located on the 17th green of Croasdaile Country club. Garduno married four times: to Barbara Jean Trembley (31 January 1959, divorced April 1966); Gretchen J. Gerke or Gere (8 August 1969, divorced October 1971); Hawley Griffith (6 December 1973, divorced October 1976 and Denise C. Rucker or Wood (married 25 August 1978) (Locke 2014). Garduno passed away in October 2014 (Head 2015). B. Modernism Historical Context It may be observed that California Bicentennial Home falls into the class of architecture known as "Modernism". Although Garduno's style is sometimes referred to as Mid -Century Modern or International, the roots of modernism can be traced to two historical architectural styles which focused on addressing the practical issues raised by matters of cost and function. Namely DeStijl (Dutch meaning the "style") and its progeny, Bauhaus. These early 20th century styles comprised the foundation for the emerging 20th century modernistic architectural movements; particularly the eclectic and highly popular International Style. DeStijl was a collective group of artists that arose in the Netherlands under the leadership of painter and designer Theo Van Doesburg (1883-1931). Today, its most well-known advocate is probably the painter Pieter Mondrian (1872-1944). Mondrian's well-known canvasses of stark, straight black' vertical and horizontal lines delineating square and rectangular spaces occasionally filled with pure colors of red, blue and yellow embody the fundamental aesthetic principles of DeStijl architecture. While DeStyl was a collective movement of formally unassociated painters, poets and even composers bound by a commitment to straight horizontal and vertical lines and the so- called primary colors of red, blue, and yellow as the basic elements of beautiful composition, Bauhaus was a formal art school established by architect Walter Gropius in Weimar, Germany in 1919. Gropius was committed to the ideas that beauty is achieved when form is faithful to 12 function in as simple a way as possible. It is interesting to note that both these companion architectural styles, DeStijl and Bauhaus, were rejected as decadent by the Nazis and, consequently became closely associated with liberal politics in the mind of the public. All in all, it would be accurate to say that the architecture of California Bicentennial Home stands as a classic application of the underpinnings of the historic modernistic movement in architecture. A. Introduction California Bicentennial Home is located at the terminus of a cul-de-sac that carries the name of Timbertop Lane (figs. 3 & 4). The house is Modern (Mid -Century) in style arguably with International style elements (McAlester and McAlester 1990). The story and a half building constructed in 1969/70 is oriented to the west to take advantage of the expansive views. Building construction is wood frame and stucco clad. The roof is flat (parapet wall facade) and presumably sheathed in composition paper. A portion of the home rests on a concrete slab while other areas are reported to sit on eight foundation piles of native stone (The Country 1970). This has not been verified as no construction plans have been made available. With the exception of some termite and dry wood damage to the rafter tails protruding from the exterior walls and the decorative ramada roof treatments, the building appears to be in good condition. B. West Elevation (Facade) The facade of California Bicentennial Home is somewhat symmetrical with two offset, 2 - story pavilions separated by a central inset glass and timber entry. A second inset entry lies in the northwest corner of the west elevation. The distinctive stucco clad walls have decorative splayed leading edges imparting the impression of adobe buttresses commensurate with Garduno's interpretation of Pueblo architecture (Plate VI Top). Fenestration comprises numerous, very large picture windows set nearly flush with the exterior walls. Casements are aluminum with wood accents (Plate VII Top). Decorative rock and tile treatments have been applied to the lower foundations and staircases. A rectangular swimming/reflection pool lies directly below the north half of the western facade and is also flanked by decorative stone tiles (Plate VI Bottom). The upper edges 13 of the roof line have been configured to appear as parapets that contain protruding timbers topped with lattice that impart the look of Southwestern ramadas (Plate VIII Bottom). C. North Elevation This elevation is very nondescript. The second story of the elevation has a small sun porch that is surmounted by decorative, protruding timbers that impart the feel of a Southwestern ramada. Entry to the porch is from an aluminum slider; the porch railing is wood timber. Connected to the first story is a small room that appears to be an addition. It has a shed roof clad with fiberglass shingles. A window air conditioning unit protrudes from the wall (Plate VII Bottom). Other HVAC equipment also lies in an alcove on the north elevation. D. South Elevation The south elevation of the house contains the garage on the lower story and a large sun deck above. The two garages are separated by an angular buttress. Each garage has a metal roll - up door with decorative eyebrow lights. These doors are likely replacements for the original wood swing -up doors so prevalent in the 1960s/70s. The sun deck has a timber railing and a large beam and lattice ramada above. To the east of the porch, the stucco wall contains three, slit style, fixed pane windows (Plate VIII Top). E. East Elevation The east elevation of California Bicentennial Horne comprises the street view. It is symmetrical in layout with a central entrance that is deeply inset and flanked by rock walls. The double entry door is decorative and fashioned from wood. Decorative electric lanterns flank the entry. A large post and beam "ramada" covers a portion of the entry approach (Plate IX Bottom). Outward appearance of the east elevation gives the building a "long and low" profile, one of the signatures of post WW II modern architecture. The upper reaches of walls just below the roof line are festooned with protruding beams giving the roof line the classic Southwestern look (Plate IX Top). Of all the elevations, Gardunos's Pueblo effect seems to work best on this elevation. The lower portions of the east elevation walls are also partially inset. Piers of 14 fieldstone 'at intervals along the bottom of the elevation contribute to the eclectic blend of elements. F. Bicentennial Home Landscgping As originally planned, California Bicentennial Home was fully landscaped with two kinds of turf and numerous native and non-native trees and plants (The Country 1970). Currently, the landscaping is somewhat nondescript neither adding to nor detracting from the overall street view appearance. In general, most of the trees and shrubbery need trimming. The olive, walnut and pepper trees are the most readily identifiable of the trees initially planted. VII. RESOURCE EVALUATION A. California Register of Historical Resources (CEM Evaluation California Bicentennial Home was evaluated for significance under criteria based on the California Environmental Quality Act (CEQA), as amended in 2015, which includes criteria for eligibility to the California Register of Historical Resources (CR -HR). Resources eligible for listing include buildings, sites, structures, objects, or historic districts that retain historic integrity and are historically significant at the local, state or national level under one or more of the following four criteria: (1) It is associated with events that have made a significant contribution to the broad patterns of local or regional history, or the cultural heritage of California or the United States. (2) It is associated with the lives of persons important to local, California, or national history; (3) It embodies the distinctive characteristics of a type, period, region, or method of construction, or represents the work of a master or possesses high artistic values; or (4) It has yielded, or has the potential to yield, information important to the prehistory or history of the local area, California, or the nation. Criterion 1 California Bicentennial Home is not associated with any event important in the regional history of California. Despite the marketing rhetoric in and attempt to link the house with California's Bicentennial, the house was constructed for the sole purpose of promoting land 15 development in what was to become an exclusive residential area. Therefore, it appears ineligible for the CRHR under Criterion 1. Criterion 2 Raul Garduno is a noted southern California architect who worked in a niche market developing difficult hillside properties with very creative solutions. His most recognized work was in Los Angeles where he designed many outstanding and very unique hillside homes that survive today. Garduno is credited as being extremely innovative in some of his hillside designs. Therefore, it can be reasonably argued California Bicentennial Home is associated with the life of an individual important to local or California history. Therefore, California Bicentennial Home appears eligible for the CRHR under Criterion 2. Criterion 3 Architecturally, the intent of the design of California Bicentennial Home was to meld Southwest Pueblo style with Mid -Century Modern. There is no denying that the residence borrows heavily from Southwestern Pueblo with the use of the exposed beams/rafter tails, timber and lattice ramadas, flat parapet roof line, white stucco exterior and the faux adobe buttresses. But, it is not truly unique as Garduno borrowed heavily from other projects in the design of this house. The reflective pool and the timber and lattice ramadas are just two examples of elements Garduno used on other projects (Toland House and Hummel House, respectively). This is not the most recognized of Garduno's designs. Specifically, the Franks House in the Crestwood Hills area of Brentwood is given far more weight when defining his career (Plate I Bottom, Plate II). Consequently, California Bicentennial Home does not appear eligible for the CRHR under Criterion 3. However, California Bicentennial Home is architecturally important at the local level, meriting special consideration in local planning. Criterion 4 It is unlikely California Bicentennial Home has the potential to yield any additional information pertinent to the history of the local area or the State of California or the nation. Therefore, it dos not appear eligible for the CRHR under Criterion 4. 16 VM. CONCLUSIONS AND R EC®N WENDA1G'IONS The results of the evaluation indicate that California Bicentennial Home appears eligible for the CRHR under Criterion 2 and considered locally important in the City of Diamond Bar under Criterion 3. No additional work in conjunction is recommended for California Bicentennial Home at this time. A copy of the DPR 523 series forms will be submitted to the South Central Coastal Information Center (SCCIC) at California State University, Fullerton. B. No Preservation Possible Preservation is always the preferred mitigative option when managing historic resources such as California Bicentennial Home. In the unlikely event that demolition of the residence is desired, then a mitigation program designed to reduce the level of the resource's significance to a level of insignificance needs to be implemented. This can be achieved through a comprehensive recordation program known as a Historic American Building Survey (NABS) and companion document, a Historic American Engineering Record (HAER). This is a federal level mitigation program that is easily adjusted to the state and local levels. It is described in some detail in the following section. The need for the HABSIHAER program lies in the fact that California Bicentennial Home appears eligible for the CRHR under Criterion 2 and local designation under Criterion 3. Although current plans call for the preservation of the building, circumstance may arise is association with future development when preservation may not be desirable. In essence, the HABS/IIAER comprises: 1) a series of high quality technical photographs of both the interior and exterior of the building, 2) the generation of scale drawings of one or more elevations, and 3) a more thorough written analysis of the building's architecture and construction. Photo documentation for the project should be accomplished by using both 4" x 5" large format black & white photographs supplemented by medium format 2" x 2" color photographs and digital photographs. At a minimum, each elevation of the house will be photographed in the 4" x 5" format. Supplemental photographs utilizing the large and medium format media will be taken on an as needed basis. The archival processing and packaging of these prints should be in accordance with NABS specifications as closely as practical. Pen -and -ink scale drawings of the exterior of the residence will be generated as well as a basic floor plan of the house. Additionally, a separate, scaled site plan will be compiled. This 17 drawing will show the relationship of the house to other features on the property. Where feasible, measurements for the drawings shall be taken by hand. Where hand measurements are impractical, they shall be made with the aid of a transit and figured trigonometrically. Measurements shall be initially recorded on large-scale field sketches which will later be used as the basis of the drawings. All drawings should be produced and processed as per BAER specifications. Supplemental research shall also be conducted on the building's architecture and construction. That information will be compiled into an illustrated, narrative report. The format and packaging of the report shall conform to HAER specifications although coordination with the National Park Service is not recommended for a CEQA level NABS/HAER study. Supplemental research shall also be conducted on the building's architecture and construction. When completed, the recommended mitigation measures as described above will have reduced the project impacts on historic resources to a level of less than significant with mitigation incorporated. 18 111!,401201 IRAQ CITY OF DIAMOND BAR AND DIAMOND BAR HISTORICAL SOCIETY (Diamond Bar) 2014 Images of America: Diamond Bar. Arcadia Publishing, Charleston, North Carolina. (e -book) DESERT SUN 1967 "'House '66' Attracts Some 30,000 Visitors." Sunday 24 March 1967: v.40/ 199:17. btlp://cdnc.ucr.edu/cgi-bin/cdnc?a---d&d=DS 19670324.2.141 (Stable URL accessed 5/17/16.) INDEPENDENT PRESS TELEGRAM 1970 "Country -Diamond Bar Exhibits Bicentennial Home". 31 January, 1970. BEAD, JEFFERY 2015 "1960s Silver Lake home retains aesthetic of architect Raul Garduno" Los Angeles Times February 21, 2015 b4p://www.latimes.com/home/hometours/la- hm-garduno-20150221-story.html Stable URL accessed March 9, 2016. HISTORIC RESOURCES GROUP 2013 Los Angeles Historic Resources Survey Report: Brentwood -Pacific Palisades Community Plan Area. Prepared for City of Los Angeles, Department of City Planning, and Office of Historic resources. Prepared by Historic Resources Group, Pasadena. LOCKE, MICHAEL 2014 "Raul Garduno, Architect 1935-2014" FLIKR Photo album and description: h!Ms://www.flickr.com/bhotos/Michael locke/sets/72157655440746461 (Stable URL accessed 5/17/16.) 1 MCALESTER, VIRGINIA AND LEE MCALESTER 1990 A Field Guide to American Houses. Alfred A. Knopf. New York. O'CONNER, PAULINE 2015 "Cantilevered 1960s Modem in Silver Lake by Raul Garduno asking 899K" Curbed Los Angeles Jun 27 2015. http://Ia.curbed.com/2015/6/27/9945484/cantilevered- I 960s-modem-in-silver- lalce-by-raul-garduno-asking-8991c Stable URL accessed March 9, 2016 PROGRESS BULLETIN (POMONA, CALIFORNIA) 1969 "Diamond Bar Development to Provide 1,000 Sites", May 25, 1969, Pg. 48. WHITE, LAURA S., ROBERT S. WHITE AND DAVID VAN HORN 2013 Historic Building Assessment For The Cerritos College 2011 Facilities Master Plan, Norwalk, Los Angles County. Unpublished manuscript on file with Archaeological Associates, Sun City 19 Plate L Top: Hillside house featured in Arts and Architecture, July 1962. Photo by Leland Yee. Bottom: Franks House illuminated at night. © J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). m Plate 11. Top: Oblique view of Franks House. 0 J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). Bottom: Upslope view of Franks House. C J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). 21 Plate M. Top: Toland House, San Clemente. (D J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). Bottom: Toland House, San Clemente. (D J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). w Plate IV. Top: Reflecting Pool at the Toland House. 0 J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). Bottom: Hummel House on foundation supports. C J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). 23 Plate V. Top: Side view of Hummel House. © J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). Bottom: Decorative roof elements used on Hummel House. © J. Paul Getty Trust. Getty Research Institute, Los Angeles (2004.R.10). 24 Plate VI. Top: Oblique view (looking northeast) of the west elevation of California Bicentennial Home. Bottom: Southeasterly view of the north half of the west elevation (Note the reflecting pool/swimming pool similar to that used at the Toland House. M Plate VII. Top: Northeasterly view of a portion of the west elevation of California Bicentennial Home showing picture window detail. Bottom: Southwesterly view of the north elevation (shed -roof extension at bottom appears to be an addition). 26 Plate VIH. Top: South elevation of California Bicentennial Home showing garage entry, slit windows and second floor sun porch. Bottom: Decorative ramada roof treatment attached to the southwest house corner similar to those used on the Hummel House. 27 Plate IX. 'Top: Oblique view looking northwest along the east elevation of California Bicentennial Home. Bottom: Main entryway centrally located on the east elevation flanked by rock walls. 28 0 EOR TENTATIVE PARCEL MAP NO. 72035 22702 TIME3EKTOP LANE, DATE: 02/24/201 G RECEIVED CrTY OF D'AMOND BAR 5U13DIVI5I0N LAND SURVEY CIVIL ENGINEERING DE51GN 135 N. 5AN GABRIEL BLVD. TRITECH 5AN GADRIEL, CA 9 1775 ENGINEERING TEL: (G2G) 570-1918 FAX: (625) 737-8786 A550CIATf5 EMAIL: info@tritechengineer.com JOB NO. 1505 19 SITE DE5CRIPTION The project Site is located at the end of Cul -De -Sac of Timbertop Ln. in city of Diamond Bars, County of Los Angeles, State of California. The north boundary of project site is located on Lazy Meadow Dr. There is an existing driveway approach at the south of property connected to Timbertop Ln. The total study area is about 3.65 ACKE5. In pre -development period, there's a single family house with pool, a detached garage and concrete driveway on site. The impervious area is around 17 %. All existing building structures and driveway will remain and protect in place. There is a small -offsite area located at northeast of property (0.09 Acre) that flow through project site and drain into Lazy Meadow Dr. both pre- and post -development. The purposed development is 3 -parcel subdivision. The existing building structures and driveway will remain and protect in place on proposed Parcel I . The proposed a single-family house will be constructed on Parcel 2 and Parcel 3. 2. DRAINAGE PATTERN The watershed area before development is divided into 4 sub -watershed areas. In the sub -area A, located at north of property, the runoff flows from south to north and drain into Lazy Meadow Dr by gravity. The average slope of flow path is about 24%. The impervious surface is about G %. For the sub -area B, located at the center of lot, the drainage pattern flows from east to west and drain to west adjacent property by gravity. The average slope of flow path is about 24 %. The impervious area is around 9%. For the sub -area C, located at south of property, the runoff flows from east to west and drain to west adjacent property by gravity. The impervious area is about 40% with a 17% -average slope of flow path. The runoff in sub -watershed area D from northeast -adjacent property flows through project site with 19% -slope and drain into Lazy Meadow Dr by gravity. There is no impervious surface in this sub -area. For post -development, the concrete gutter will be constructed along the west property line to collect runoff and drain into Lazy Meadow Dr. The watershed area ,s divided into 10 sub -watershed areas. For the sub -area A, B, C, D, E, and J, the hydrology characteristics are same as existing. The runoff will be collected by concrete gutters and drain into Lazy Meadow Dr by gravity. For the sub -area F, H and I, the runoff will be collected by catch balm and drain into Lazy Meadow Dr by gravity. In the sub -area G, the elevation is lower than others. The runoff will be collected by sump pump and pump out to Lazy Meadow Dr. For the impervious ratio and slope of flow path, see hydrology analysis table for details. 3. SITE VICINITY Q -o v � C; ® p > \ . g= . 1 9, %IjJP=0.50 i 1 \ k14 a, ��.,��. mm CP O� g�O Q \\ S ® l I `I ' �r__�1 / I ' 1111 �,�..� , •i I 1 l� ...,.. t J x r i. jI O —+ !: 111 I ,It"""•_aCA..... 0 � I � Ii. [� Q too uJ w - lu 1 LLJ 'r - _I- - 7yyu�a' DRIVE G „� .a�>~_ _ �_- ._ Q Q =O IIO Dol O QD C; II N o in � II S � � J 1I S J 5. HYDROLOGY ANALY515 FROM L.A. HYDROLOGY MANUAL FIG. H 1. 12 (5EE ATTACH 5HEFT5) 501L CLA55IfICATION: 090 50 YEAR, 24 Hour rainfall = G.3" PRE -DEVELOPMENT TOTAL 3.65 P05T-DEVELOPMENT AREA (ACRE) LENGTH (FT) SLOPE %IMF A 1.2G 412.00 0.24 0 -.OG 13 1.45 404.00 0.24 0.09 C 1 1.05 330.00 0.17 0.40 D 1 0.09 111.00 0.19 0.01 TOTAL 3.65 P05T-DEVELOPMENT TOTAL 3.85 AREA (ACRE) LENGTH (IT) 5LOPE 0701 M P A 0.13 122.00 0.19 0.13 15 0.43 268.00 0.31 O.OG C 0.42 347.00 0.27 0.14 D 0.88 405.00 0.23 0.17 E 0.90 290.00 0.19 0.50 F 0.25 190.00 0.01 0.70 G 0.07 55.00 0.01 1.00 0.07 2GG.00 0.28 0.01 0.51 158.00 0.04 0.57 0. 19 95.00 0.31 0.01 TOTAL 3.85 USE HydroCaic Calculator ( 5EE ATTACH SHEETS ) PRE -DEVELOPMENT TOTAL 12.5529 1705T -DEVELOPMENT Q50 (Cf5) To (min) A 4.0893 5 5 4.7123 5 C 3.4599 5 1) 0.2914 5 TOTAL 12.5529 1705T -DEVELOPMENT TOTAL I 2.G42G Q50 (Cf5) Tc. (min) A 0.4232 5 E3 1.395G 5 C 1.3G80 5 D 2.8702 5 Iff 2.9765 5 F 0.6348 5 G 0.2368 5 0.2267 5 I.G932 5 O.G 153 5 TOTAL I 2.G42G 34° 00'00" SAN DUMAS 1-H1.22 ORANGE 33° 52' 30" ^ / Sol). i 0 ') 2 MII85 LES Illi Fhl CLASSI FtCAT1O1 - - yl�i COG N 4LA' 25 -YEAR 24-HOUR ISOHYET REDUCTION FACTOR: 0.878 7.2 uvcHLs of 10 -YEAR 24-HOUR ISOHYET REDUCTION FACTOR: 0.714 "11FALL `PUBLIC WORKS '®RBA LSA 11-H1.12 11A�� m DEBRIS app ppp 7p� �7�g�[���r'3� j 4Ja POTS\TIAL 50 -YEAR 24—HOUR YlSOH J1L .J7.:1 .11 ARC,4 Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 7 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID PRE A Area (ac) 1.26 Flow Path Length (ft) 412.0 Flow Path Slope (vfUhft) 0.24 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.06 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8634 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 4.0893 Burned Peak Flow Rate (cfs) 4.0893 24 -Hr Clear Runoff Volume (ac -ft) 0.2318 24 -Hr Clear Runoff Volume (cu -ft) 10098.6448 Hydrograph (22702 TIMBERTOP LANE,: PRE A) 4.5 4.0 - 3.5 - 3.0 - e 2.5- 0 2.0- 1.5 1.0- 0.5- 0.0 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) )2 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 7 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID PRE B Area (ac) 1.45 Flow Path Length (ft) 404.0 Flow Path Slope (vfUhft) 0.24 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.09 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8646 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 4.7123 Burned Peak Flow Rate (cfs) 4.7123 24 -Hr Clear Runoff Volume (ac -ft) 0.28 24 -Hr Clear Runoff Volume (cu -ft) 12195.1569 Hydrograph (22702 TIMBERTOP LANE,: PRE B) 4- 3- 0 U- 2- 01 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) )2 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/l 50919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 7 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID PRE C Area (ac) 1.05 Flow Path Length (ft) 330.0 Flow Path Slope (vfUhft) 0.17 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.4 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8767 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 3.4599 Burned Peak Flow Rate (cfs) 3.4599 24 -Hr Clear Runoff Volume (ac -ft) 0.3013 24 -Hr Clear Runoff Volume (cu -ft) 13123.839 3.5 Hydrograph (22702 TIMBERTOP LANE,: PRE C) 3.0 - 2.5 - -2.0- U 3: 0 1.5- 1.0- 0.5 -.0 0 200 400 600 Soo 1000 1200 1400 1600 Time (minutes) Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID PRE D Area (ac) 0.09 Flow Path Length (ft) 111.0 Flow Path Slope (vfUhft) 0.19 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.01 .Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8615 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 0.2914 Burned Peak Flow Rate (cfs) 0.2914 24 -Hr Clear Runoff Volume (ac -ft) 0.0152 24 -Hr Clear Runoff Volume (cu -ft) 661.9834 Hydrograph (22702 TIMBEPTOP LANE,: PRE D) 0.30 0.25 - 0.20 - 0.15 - 0 LL - 0.10 - 0.05 - 0.00 0 200 400 600 Boo 1000 1200 1400 1600 Time (minutes) 12 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 Version: Hydrocalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST A Area (ac) 0.13 Flow Path Length (ft) 122.0 Flow Path Slope (vfUhft) 0.19 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.13 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8662 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 0.4232 Burned Peak Flow Rate (cfs) 0.4232 24 -Hr Clear Runoff Volume (ac -ft) 0.0267 24 -Hr Clear Runoff Volume (cu -ft) 1161.9392 Hydrograph (22702 TIMBERTOP LANE,: POST A) 0.45 0.40 - 0.35 - 0.30 - 0.25 - U 0 0.20- LL- 0.15 - 0.10 - LI 0.05- 0.00 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) )2 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 7 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST B Area (ac) 0.43 Flow Path Length (ft) 268.0 Flow Path Slope (vft/hft) 0.31 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.06 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8634 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 1.3956 Burned Peak Flow Rate (cfs) 1.3956 24 -Hr Clear Runoff Volume (ac -ft) 0.0791 24 -Hr Clear Runoff Volume (cu -ft) 3446.3629 Hydrograph (22702 TIMBERTOP LANE,: POST B) .4 1.2- 1.0- 0.8- 0.6- 0.4- 0.2- - 0.00 200 400 600 800 1000 1200 1,400 1600 Time (minutes) )2 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST C Area (ac) 0.42 Flow Path Length (ft) 347.0 Flow Path Slope (vft/hft) 0.27 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.14 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8666 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 1.368 Burned Peak Flow Rate (cfs) 1.368 24 -Hr Clear Runoff Volume (ac -ft) 0.0875 24 -Hr Clear Runoff Volume (cu -ft) 3809.3492 Hydrograph (22702 TIMBERTOP LANE,: POST C) 1.4 1.2- 1.0- -0.8- 0 0.6 - 0.4- 0.2- - 0.01 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) )2 TIMBE Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)[TM/HYDRO/22? Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST D Area (ac) 0.88 Flow Path Length (ft) 405.0 Flow Path Slope (vfUhft) 0.23 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.17 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8677 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 2.8702 Burned Peak Flow Rate (cfs) 2.8702 24 -Hr Clear Runoff Volume (ac -ft) 0.1912 24 -Hr Clear Runoff Volume (cu -ft) 8329.6705 Hydrograph (22702 TIMBERTOP LANE,: POST D) 3.0 2.5 - 2.0 - 1.5 - 0 U- 1.0 - 0.5 - L 0.0 - 0 200 400 600 Soo 1000 1200 1400 1600 Time (minutes) )2 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)fTM/HYDRO/22 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST E Area (ac) 0.9 Flow Path Le ngth (ft) 290.0 * Flow Path Slope (vfUhft) 0.19 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.5 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity- (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8806 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 2.9788 Burned Peak Flow Rate (cfs) 2.9788 24 -Hr Clear Runoff Volume (ac -ft) 0.2855 24 -Hr Clear Runoff Volume (cu -ft) 12435.9717 Hydrograph (22702 TIMBERTOP LANE,: POST E) 3.0 2.5 - 2.0 - (n U 1.5- 2 LL 1.0- 0.5- 0.0. 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) )2 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 7 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST F Area (ac) 0.25 Flow Path Length (ft) 196.0 Flow Path Slope (vfUhft) 0.01 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.7 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8883 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 0.8348 Burned Peak Flow Rate (cfs) 0.8348 24 -Hr Clear Runoff Volume (ac -ft) 0.0944 24 -Hr Clear Runoff Volume (cu -ft) 4113.8626 Hydrograph (22702 TIMBERTOP LANE,: POST F) 0.9 0.8 - 0.7 - 0.6 - 20.5- 0.4- U- 0.3- 0.2- 0.1- 0.0 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) )2 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST G Area (ac) 0.07 Flow Path Length (ft) 55.0 Flow Path Slope (vfUhft) 0.01 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 1.0 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.9 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 0.2368 Burned Peak Flow Rate (cfs) 0.2368 24 -Hr Clear Runoff Volume (ac -ft) 0.0328 24 -Hr Clear Runoff Volume (cu -ft) 1428.8404 Hydrograph (2.2702 TIMBERTOP LANE,: POST G) 0.25 0.20- 0.15- tn 0 LL- 0.10- 0.05 - 0.00 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)[TM/HYDRO/22? Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST H Area (ac) 0.07 Flow Path Length (ft) 266.0 Flow Path Slope (vft/hft) 0.28 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.01 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8615 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 0.2267 Burned Peak Flow Rate (cfs) 0.2267 24 -Hr Clear Runoff Volume (ac -ft) 0.0118 24 -Hr Clear Runoff Volume (cu -ft) 514.876 Hydrograph (22702 TIMBERTOP LANE,: POST H) 0.25 0.20- 0.15- 0 U- 0.10- 0.05- 0.00 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) )2 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/l 50919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST I Area (ac) 0.51 Flow Path Length (ft) 158.0 Flow Path Slope (vft/hft) 0.04 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.57 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8833 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 1.6932 Burned Peak Flow Rate (cfs) 1.6932 24 -Hr Clear Runoff Volume (ac -ft) 0.1726 24 -Hr Clear Runoff Volume (cu -ft) 7517.8808 Hydrograph (22702 TIMBERTOP LANE,: POST I) 1.8 1.6 - 1.4 - 1.2 - 1.0 U - -2 0.8 - U- 0.6 - 0.4 - 0,2- 0.0 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) )2 TIMBERTC Peak Flow Hydrologic Analysis File location: C:/Documents and Settings/Owner/Desktop/smith/150919(22702 Timbertop Lane, Diamond Bar, CA 91765)/TM/HYDRO/22 7 Version: HydroCalc 0.3.0 -beta Input Parameters Project Name 22702 TIMBERTOP LANE, Subarea ID POST J Area (ac) 0.19 Flow Path Length (ft) 95.0 Flow Path Slope (vfUhft) 0.31 50 -yr Rainfall Depth (in) 6.3 Percent Impervious 0.01 Soil Type 90 Design Storm Frequency 50 -yr Fire Factor 0 LID False Output Results Modeled (50 -yr) Rainfall Depth (in) 6.3 Peak Intensity (in/hr) 3.7588 Undeveloped Runoff Coefficient (Cu) 0.8611 Developed Runoff Coefficient (Cd) 0.8615 Time of Concentration (min) 5.0 Clear Peak Flow Rate (cfs) 0.6153 Burned Peak Flow Rate (cfs) 0.6153 24 -Hr Clear Runoff Volume (ac -ft) 0.0321 24 -Hr Clear Runoff Volume (cu -ft) 1397.5206 0.7 Hydrograph (22702 TIMBERTOP LANE,: POST J) 0.6 - 0.5 - 0.4 - U 0 1Z 0.3 - 0.2 - 0.1 - 0.01 0 200 400 600 800 1000 1200 1400 1600 Time (minutes) )2 TIMBERTC Cal Land Engineering, Inc. C E I V E D dba Quartech Consultants Geotechnical, Environmental and Civil Engineering QMr O'F T)TA Aa()March 2, 2016 Twen Ma Architects 195 Mt. Olive Drive Bradbury, California Subject: Report Update, 22702 Timbertop Lane, APN: 8713-028-012 Diamond Bar, California, Project No.: 12-034-007EG References: "Report of Geotechnical Investigation, Proposed Residential Development 22702 Timbertop Lane, APN: 8713-028-012, Diamond Bar, California" by Cal Land Engineering, Inc., dated August 22, 2012; Project No.: 12-034-007GE Gentlemen: Based on our review of the referenced report, the following presents the updated seismic related values for the site in accordance with ASCE 7-10 Standards, CBC 2013. Seismic Parameters (Latitude: 33.980408, Longitude: -117.820950) Site Class D Mapped 0.2 Sec Period Spectral Acceleration Ss 2.213g Mapped 1.0 Sec Period Spectral Acceleration Si 0.781g Site Coefficient for Site Class "D", Fa 1.0 Site Coefficient for Site Class "D", Fv 1.5 Maximum Considered Earthquake Spectral Response Acceleration Parameter at 0.2 Second, Sews 2.213g Maximum Considered Earthquake Spectral Response Acceleration Parameter at, 1.0 Second, Smi 1.171g Design Spectral Response Acceleration Parameters for 0.2 sec, SDS 1.476g Design Spectral Response Acceleration Parameters for 1.0 Sec, Sal 0.781g The Project Structural Engineer should be aware of the information provided above to determine if any additional structural strengthening is warranted. The remaining design and construction recommendations presented in the referenced report remain valid and applicable. This opportunity to be of service is sincerely appreciated. Should you have any questions pertaining to this addendum, please call us. Respectfully submitted, Cal Land Engineering, Inc. (CLE) dba Quartech Consultants (QCQ 0V-t--00)U/V. G. <k MC) M Jack C. Lee, GE 2163 4Q 7- rEG 576 East Lambert Road, Brea, CVV ,Yohn Thurlo a 92821; Tel: 714-671-1050; Fax: 714-671-1090 -10:420121915FETZ011 HEM'M M.-VIIIISH Proposed Residential Development 01 QUARTECH CONSULTANTS Project No.: 12-034-007EG August 22, 2012 11PURPOSE .............................................................................................................................. 1 1.2SCOPE OFSERVICES .............................................................. .............................................. 1 1.3PROPOSED CONSTRUCTION .................................................................................................. 1 1.4SITE CONDITIONS .................................................................................................................. 1 2-8 SUBSURFACE EXPLORATION AND LABORATORY TESTING ....................................... 2 ' 2]SUBSURFACE EXPLDRAT|ON................................................................................................... 2 4.0 SOIL CONDITIONS ................................................................................................................. 3 41SITE GEOLOGY ..................................................................................................................... 3 4. 1.YColluvium (Map Symbol —C)co/............. ........................................................... ......... 3 4.Y2Old Alluvium (Map Symbol —[)e0----------------------~----3 4.13Puente Formation, Map Symbol —7m-------------------------3 4.2GEOLOGIC STRUCTURES ....................................................................................................... 3 ti1PROPOSED SLOPES .............................................................................................................. 4 5.2SURFkCIALSLOPE STABILITY AND LANDSCAPING .................................................................... 5 6.0 CONCLUSIONS .................................................................................................................... 5 tl1SEISMICITY ................................................................................................. ......................... 5 tl2ExCAVATAB|UTY.............................................................................. .................................... 5 fi3SOIL CONDITIONS ................................................................................................................. 5 tL4GROUNDWATER .................................................................................................................... O tl5SEISMIC INDUCED HAZARD .................................................................................................... 0 7.1GRADING ........................................................................................... .................................. 6 7.Y.YSite Preparation -----------------------~-----^-----'6 7.1.3 Benching....................................................................................................................... 7 7.1.4 Treatment of Removal Bottoms.................................................................................... 7 7.1.5 Structural Backfill .......................................................................................................... 7 7.2 FOUNDATION DESIGN............................................................................................................ 7 7.2.1 Shallow Foundation...................................................................................................... 7 7.2.2 Caisson Foundation......................................................................................................7 7.2.3 Foundation Setback .................................. ........................................... ........... :............. 8 7.2.4 Settlement ....................................... .............................................................................. 8 7.2.5 Stabilization Caissons................................................................................................... 8 7.2.6 Lateral Pressures.......................................................................................................... 8 7.3 FOUNDATION CONSTRUCTION................................................................................................9 7.4 CAISSON CONSTRUCTION......................................................................................................9 7.5 CONCRETE FLATWORK........................................................................................................10 7.6 FLOOR SLABS.....................................................................................................................10 7.7 RETAINING WALL BACKFILL.................................................................................................10 9.0 SEISMIC DESIGN................................................................................................................11 10.0 INSPECTION .....................................................................................................................11 12.0 REFERENCES...................................................................................................................12 Twen Ma Architects QCI Project No.: 12-034-007EG Page 1of12 August 22.2O12 1.1 Purpose This report presents asummary Ofour preliminary geotechnicalengineering investigation for the proposed COOStruCti0l at the subject site. The purposes of this investigation were to evaluate the subsurface conditions at the area of construction and to provide recommendations pertinent tOgrading, foundation design and other relevant parameters Ofthe proposed development. 1'2 Scope of Services {}C| scope Ofservices included: * Subsurface exploration consisting of logging and s8nlo|iOg of seven test pits. The test pits were extended to a maximum depth of 15.0 feet below the existing ground surface. Test pit logs are presented iOAppendix A. * Laboratory testing ofrepresentative samples toestablish engineering characteristics ofthe on-site soil. The laboratory test results are presented inAppendices Aand Ei 0 Engineering analyses of the geotechnical data obtained from our background studies, field investigation, and laboratory testing. p Preparation of this report presenting our findings, conclusions, and recommendations for the proposed construction. 1.3 Proposed Construction The proposed development is to subdivide the property into three parcels. The existing residence is anticipated to be remain in place and the newly created parcels will utilize the cut and fi|| grading operation to create two multi-level building pada for the proposed single-family residences. The proposed residences are anticipated tobewood frame structures with concrete slab -on -grade. Retaining walls up to feet in height will also be constructed at the neg[ yard to provide the level pad grade for the proposed construction. 1.4 Site Conditions The subject site is located at west end of Timbertop Lane and south side of Lazy Meadow Drive in the City OfDiamond Bar, California. Approximate FggioO8| location is shown on the attached Site Location yWgp (Figure 1). A single-family FgSidgOCg and 8SSOCiatgd St[UCtUFes existed at the lot adjacent to the west end OfTi0bertOp Lane. The majority of the site is occupied by the southerly descending S|Opg. N18xiDluDl slope ratio is approximate 2tO 1 (horizontal t0vertical) or 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 Twen Ma Architects Page 2 of 12 QCI Project No.: 12-034-007EG August 22, 2012 flatter. No major erosions were observed during our field investigation. Detailed configuration of the site is shown on the attached plan. 2.1 Subsurface Exploration Seven test pits were extended to a maximum depth of 15.0 feet at the location shown on the attached Site Plan, Figure 2. The test pits were supervised and logged by an engineering geologist of this office. Relatively undisturbed and bulk samples were collected for laboratory testing. Logs of test pit are presented in Appendix A. 2.2 Laboratory Testing Representative samples were tested for the following parameters: in-situ moisture content and density, direct shear strength, expansion index, and corrosion potential. Results of our laboratory testing along with a summary of the testing procedures are presented in Appendix B. In-situ moisture and density test results are presented on the trench logs in Appendix A. The site is a portion of Tract No. 30091 and was previously investigated and rough graded under the inspection services of the Robert Stone & Associates (see reference). The geotechnical report by Robert Stone & Associates (RSA) indicated that the area is underlain by surficial soils and sandstone/siltstone/shale of Puente Formation. The report by RSA indicated that no landslide was observed at the subject site. No grading and fill compaction reports were available during CLE's initial research. However, the geological review sheet by County of Los Angeles indicated that the subject site was Lot 130, Tract 30091. Grading was performed for the driveway only. This review sheet also indicated that additional grading also had been performed apparently without a permit. It appears that the past grading activities were performed within the existing residential area. Subsequently to above mentioned grading activities, the site was inspected by Evans, Goffman & McCormick and Robert Stone & Associates (see references). These reports indicated that a 150 feet long and 5 feet high cut slope was created. The surficial soils were removed and bedrock was exposed on the slope. Additionally, geological structure is favorable to the slope. 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 TvveO Ma Architects QCI Project No.: 12-034-007EG Page 3of12 August 22'2O12 The report by Robert Stone Q'Associates indicated that all Side s|OpgS were keyed into bedrock and the geological structures are considered favorable tothe slopes. 4.1 Site Geology The project site is underlain by Co{|uVurO, older gUuYiG| deposits and SBndStOD8/Si|tS[one bedrock Of Puente Formation (T[O. [}ibbl8e. 2001). A dgSChptiOO of the SUbSUrf8De Dl8t8h8|S from top down are provided as follow: CO||UVumXs are comprised of firm 03 stUf, moist, dark grayish b[OVvO. sandy clay (CL). These deposits where encountered are one to seven feet in thickness. The colluviurn is not suitable for structural support and should beremoved. 4.1.2 Old Alluvium (Map Symbol — Qal) Older alluvial deposits were encountered adjacent to Lazy Meadow Drive and comprised of very stiff to hard, moist, dark brown, sandy clay (CL). These deposits where encountered are three to more than fifteen feet in thickness. Underlying the fill is the bedrock of Puente Formation (Tm. Geologic Map ofYnrb8 Linda Q^ Fz[@dO OaDl [)UadnaDg|8S. byThomasW. Dibb1ee, Jr., 2001). This fOrDab0l primarilyC0D3iSt3 of light brown sandstone, and siltstone, platy, slightly moist and moderately hard 4.2 Geologic Structures Based Onour subsurface exploration and review the referenced reports,bedrock across the site generally dips toward southeast to northeast at |Vvv to moderate angles. Bedding plane orientation generally appears neutral to f@VOn]b|8 with respect to the 0VenG|| stability Of the site. No eVid8DC8 of any major bedrock instability, such as landslide or faults was observed during our field investigation. 4.3 Groundwater No ground water was encountered during our field investigation to a depth of approximately 15.0 feet. Groundwater is not expected k»bg8significant constraint during future construction. 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 Twen Ma Architects QCI Project No.: 12-034-007EG W111MIXOPTI-14MI, M-111111#0 5.1 Proposed Slopes Page 4 of 12 August 22, 2012 Shear strength or residual shear strength utilized on the slope stability analysis was evaluated based on our laboratory testing results. The shear strength used in our slope stability analysis is summarized in the following table: A summary of the stability analyses and corresponding preliminary geotechnical recommendations are summarized in the following table, and sections and calculations are presented on the following plates. Calculated Conditions Unit Weight Friction Angle Cohesion Material (pcf) (Degree) (psf) A row of caissons spacing at 5 feet and A -A' Static/Seismic Static/Seismic Surficial Soil 125 28/28 270/270 Bedrock 125 32/34 360/480 A summary of the stability analyses and corresponding preliminary geotechnical recommendations are summarized in the following table, and sections and calculations are presented on the following plates. Calculated Conditions Safety Factor Conclusions and Recommendation Static/Seismic Existing Slope Along Section A row of caissons spacing at 5 feet and A -A' 1.50//1.32 embedded at least 3 feet below grade should be constructed. Existing Slope Along Section B -B' 1.70/1.45 Stable as planned Surficial Slope Stability 1.57 Stable as existed Based on our slope stability analysis, it is recommended that a row of stabilization soldier piles 2 feet in diameter and spacing at 5 feet in center be utilized for the support of the proposed rear yard retaining wall at Parcel 3. The approximate location of the recommendedr soldier pile is presented in the site plan, Figure 2. The main purpose of the stabilization soldier pile is to provide the additional lateral support and to increase the slope stability safety factor to 1.5 of the proposed cut slope. A slope maintenance program should be initiated as soon as possible after the completion of the soldier piles installation in accordance with this report. 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 TVveO Ma Architects QCI Project No.: 12-034-007EG Page 5uf12 August 22.2O12 5.2 SmrficioUSlope Stability and Landscaping All SNp8S will be 3Ubi3Ct to Su[fi[jG| grOSiVD. Therefore, S(OpeS should be protected from surface runoff by D0egDS of top -of -slope DOOlpgct8d earth b8O0S or concrete interceptor drains. All S|OpgS should be landscaped with @ suitable plant material requiring 0iDiDl8l CU|bY8tiVO and i[[iggUOO vV@tB[ in order tnthrive. An irrigation system should be installed. Ov8Pw8t8hOg and subsequent saturation ofslope surfaces should beavoided. 4tall times avoid saturation ordesiccation ofthe slope materials since these conditions tend to deteriorate the slope. |[hgab0O fad|iU8S should be tU[OGd off during the rainy season. Maintenance includes correction of defective drainage terraces on slope, elimination of burrowing rodents, cO[neCtVDS Of defective iOiO8tOD f@[jlhj8S. and COOtn]Ued slope vegetation growth. |OigaUOO programs for all |GDdScaogd slopes ghOU|d be well controlled and minimized. Seasonal adjustments should be 0odn to prevent excess moisture in the slope soils. Overwatering, especially prior to winter storms,.may generate surficial slope distress. Based on the naauK3 of our subsurface investigation and engineering analyses, it is our opinion that the proposed construction is feasible from o geotechnical staOdpoiOt, provided the recommendations contained herein are incorporated in the design and construction. The following is a summary of the geotechnical design and oVOatnuctiOD factors that may affect the development of the site: 6.1 Seismicity Based on our studies on seismicity, there are no known active faults crossing the property. However, the site i3 located in @ seismically active region and is subject toseismically induced ground shaking from nearby and distant faults, which is a characteristic of Southern California. 6'2 EzcavatabiUit» Based on our subsurface investigation, excavation of the subsurface materials should be able to be accomplished with conventional earthwork equipment. / 6.3 Soil Conditions The proposed building pads are underlain by oO|uviuDl. @]|UViUO0, and bedrock of Puente 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 TweDK8GArchitects Page 8Of12 QCI Project No.: 12-034-007EG August 22, 2012 varied from approximate 3 feet within the southerly portion of the property to more thaO15 feet within the northerly portion of the pn]p8dx. The encountered COUUViuDl varies in density and is not suitable for the fill and foundation support. The encountered alluvium may b8suitable for the D|} support. HOVY8Y8[, it is recommended that all residential foundations be founded on competent bedrock. 6.4 Groundwater Groundwater was not encountered during OUF field exploration. In our opinion, gnJUOdVVat8r will not be aproblem during construction. 8'5 Seismic Induced Hazard Based on our review of the "Seismic Hazard Zones, Yorba Linda Quadrangle" by California Department Of CODsenGatioD, Division Of K8iO8S and GeOOgy, it is CODdUded that the Site is not located within the potential seismic induced slide areas. Based on the subsurface conditions exposed during field investigation andlatesting pP3gFaDl, it is [8CD000gnd8d that the hol|OVYO0 FecODlDl9DdaUOOS be iOCO[pO[8tgd in the design and construction phases of the project. 7.1 Grading 7.1.1 Site Preparation Prior to inUj8bDg grading operations, any existing vegetation, debris, OVeFSbJed m8beh@|S (greater than 8 inches), and other deleterious materials within fill areas should be removed from the site. 7.1.2 Surficial Soil Removals |O areas to receive fill, unsuitable colluvium ShOU|d be neDlOV8d to eXpOS8 competent alluvium or bedrock. The depth of removals may vary with locations. HVvVeVe[ based OD our subsurface investigation, [gDlOV8| of to 4 feet of the eXSdOg soil over the fill area ShOV|d be anticipated. The actual removal depths should bedetermined iDthe field as conditions are exposed and the final design of the building. Visual inspection and/or 1e3UO0 may be used to define [erOOV@| requirements. 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 Tvv8OK8aArchitects Page 7Of12 QCI Project No.: 12-034-007EG August 22, 2012 7.1.3 Benching Fills [daCRd on slopes steeper than 5 t 1 to vertical) should bekeyed and benched into QonODet8Ot materials. All fill kevs, ne[nOVG|S and b8nCheS, should be observed and evaluated by the project geotechnical consultant. Typical benching details are included in the attached plates. 7.1.4 Treatment of Removal Bottoms Soils exposed within areas approved for fill placement should be scarified to o depth of inches, conditioned to near optimum moisture content, then compacted in-place to project 7.1.5 Structural Backfill The onsite soils may be used as compacted fiU, provided they are [nee of organic noat8ha|a and debris. FU|S should be placed in [8|@timek/ thin |iM3, brought to D88[ VptiDlUDl OlOiStUP3 coOtgOt, dleD compacted to obtain atleast SO percent relative compaction based on laboratory standard ASTM D-1557-09. 7.2Foundation Design 7.2.1 Shallow Foundation Continuous and spread foundation founded entirely on the bedrock may be used for the proposed structures. An allowable bearing value of 2500 pounds per square foot may be used for design of wall footings 12 inches wide and 24 inches deep. This value may be increased by one-third when considering short duration seismic O[wind loads. 7.2.2 Caisson Foundation Caisson and grade beam foundation system may be used for the support of the proposed residences where the bedrock is relatively deep in the northerly portion of the site. Caissons S'hOUN be 8 OliOiOlUDl of feet into the COOlD8teOt bedrock and 24 iOCh8S in [U8FUBtS[ to facilitate cleanout. An 8|}0Yv@b|e skin friction of 400 p5f may be used for the portion of the caisson embedded in competent bedrock. The base Of all CgiSS0O eXCgV8UOD should be clear Dfany |OOsg and/or disturbed 08te[ig|S. All Cai5SOOS should be tied in two horizontal directions with grade beam or footings. 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 TVvgO Ma Architects QCI Project No.: 12-034-007EG Page 8of12 August 22, 2012 7.2.3 Foundation Setback All R*sidential foundation should be setback from the adjacent slope face per current City's building code (i.e. H/3 but not tOexceed 40 hOhZVOt8| feet). Additionally, all foundations Sh0Uid 02iOtgiO a OOiOi0u0 hVriZODt@| distance of feet between the edge of the footing and the slope face. NO passive pressure is allowed for the portion Of the fO[diOg. which maintain |3Ss than 7 horizontal feet between the edge ofthe footing and the slope face. 7.2.4 Settlement Settlement of the footings placed as recommended and subjected to no more than allowable loads and isnot expected toexceed 3/4inch. Differential settlement between adjacent columns is not anticipated to exceed 1/2 inch. 7.2.5 Stabilization Caissons The stabilization caissons should beutilized for the support Ofthe proposed retaining wall adthe near portion of Parcel 8. These caissons may be atleast 2feet iO diameter and spacing gt5feet in center to center. In accordance with our slope stability aDg|ysi3, the calculated potential slip planes is located at the approximate depth. of 3 feet below the proposed toe of the retaining wall. It is, therefore, recommended that these caissons should be designed to resist an lateral load of 2O.00Opounds iOthe upper 3feet ofthe recommended caissons. Resistance to the lateral load may be provided by the friction acting at the base of the caissons and by passive earth p[eSSU[8 within the CO0oehaOt bedrock at the depth below the ooteOU@| slip plane located at 3 feet below the toe of the proposed retaining vva|i. Passive earth pressure may be computed as an equivalent fluid pressure of 400 pounds per cubic foot for the portion of the caisson embedded in the competent bedrock. An allowable coefficient of friction between soil and C0OC[8te of 0.35 may be used with the dead load for ceS. When combining passive pressure and frictional resiatance, the passive pressure component should be reduced by one- third. 7.2.6 Lateral Pressures The active earth pressure to be utilized for cantilever retaining wall designs may be computed as an equivalent fluid having a density of 40 pounds per cubic foot when the slope of the backfill behind the vvaU is |eY8i Where the slope of the backfill is 1 1/2 to 1, an equivalent fluid pressure of 60 pounds per cubic foot may be used. 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 Twen Ma Architects Page 9 of 12 QCI Project No.: 12-034-007EG August 22, 2012 Passive earth pressure may be computed as an equivalent fluid pressure of 400 pounds per cubic foot for the portion of the caisson embedded in the competent bedrock. An allowable coefficient of friction between soil and concrete of 0.35 may be used with the dead load forces. When combining passive pressure and frictional resistance, the passive pressure component should be reduced by one-third. It is recommended that a minimum horizontal distance of seven feet be maintained between the face of the slope to all footings. No passive pressure is allowed for the portion of the footings, which maintain less than 7 horizontal feet between the face of the slopes and the edge of the footings. 7.3 Foundation Construction All shallow footings should be founded in approved soils and founded at least 24 inches below the lowest adjacent ground surface and founded on competent bedrock. All continuous footings should have a minimum of two No. 4 reinforcing bars placed at the top and bottom of the footing. 7.4 Caisson Construction All caissons should be tied with grade beams. The caissons should be -designed in accordance with the recommendations presented in this report. The base and the wall of the caissons should be cleaned of any loose and/or disturbed materials. The successful installation of the cast -in-place stabilization caissons will depend upon the effective sealing of the water and preventing of caving by means casing driven pass the potential water bearing layers. Care should be taken in setting reinforcing cages. Drilled holes should be filled with concrete as soon as possible after excavation. Tremi concrete and/or other suitable concrete placement methods may be used to prevent the disturbed of the soil/bedrock by contact. It is recommended that the sides and bottom of the drill holes should be observed by project geotechnical consultant to ensure that the hole is clean and free of any loose debris prior to the concrete placement. 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 Twen Ma Architects QCI Project No.: 12-034-007EG 7.5 Concrete Flatwork Page 10 of 12 August 22, 2012 All concrete slabs such as driveway and walkway should be at least four inches in thickness. Concrete slabs should be reinforced with a minimum No. 3 bars at 18 -inches in center both way or its equivalent. All slab reinforcement should be supported to ensure proper positioning during placement of concrete. 7.6 Floor Slabs Residential floor slabs should be designed as raised floor or structural slabs deriving support from the foundation system. 7.7 Retaining Wall Backfill The wall backfill and any other structures should be compacted. All soil backfill should be compacted to obtain a minimum relative compaction of 90 percent of the ASTM D-1557-09. No flooding and/or jetting is allowed for the onsite soils. Adequate drainage system should be provided behind the walls to prevent the build-up of any hydrostatic pressure. Observation and testing of all compaction should be performed under the direction of the project geotechnical engineer. Chemical laboratory tests were conducted on the existing onsite near surface materials sampled during QCI's field investigation to aid in evaluation of soil corrosion potential and the attack on concrete by sulfate soils. The testing results are presented in Appendix B. According to CBC and ACI 318, Table 4.3.1, a "negligible" exposure to sulfate can be expected for concrete placed in contact with the onsite soils. Therefore, Type 11 cement or its equivalent may be used for this project. Based on the resistivity test results, it is estimated that the subsurface soils are moderately to severely corrosive to buried metal pipe. It is recommended that any underground steel utilities be blasted and given protective coating. Should additional protective measures be warranted, a corrosion specialist should be consulted. 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 Twen Ma Architects Page 11 of 12 QCI Project No.: 12-034-007EG August 22, 2012 9.0 SEISMIC DESIGN Based on our studies on seismicity, there are no known active faults crossing the property. However, the subject site is located in southern California, which is a tectonically active area. Based on 2010 California Building Code (Chapter 16) the following seismic related values may be used: Seismic Parameters (Latitude: 33.980408, Longitude: -117.820950) Mapped 0.2 Sec Period Spectral Acceleration Ss 1.732g Mapped 1.0 Sec Period Spectral Acceleration Si 0.626g Site Coefficient for Site Class "D", Fa 1.0 Site Coefficient for Site Class "D", Fv 1.5 Maximum Considered Earthquake Spectral Response Acceleration Parameter at 0.2 Second, SMs 1.7328 Maximum Considered Earthquake Spectral Response Acceleration Parameter at 1.0 Second, SM1 0.9388 Design Spectral Response Acceleration Parameters for 0.2 sec, SDS 1.155g Design Spectral Response Acceleration Parameters for 1.0 Sec, SD1 0.626g The Project Structural Engineer should be aware of the information provided above to determine if any additional structural strengthening is warranted. As a necessary requisite to the use of this report, the following inspection is recommended: ® Temporary excavations. ® Removal of surficial and unsuitable soils. 0 Backfill placement and compaction. - ® Utility trench backfill. The geotechnical engineer should be notified at least 2 day in advance of the start of construction. A joint meeting between the client, the contractor, and the geotechnical engineer is recommended prior to the start of construction to discuss specific procedures and scheduling_ 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 Twen Ma Architects Page 12 of 12 QCI Project No.: 12-034-007EG August 22, 2012 11.0 INVESTIGATION LIMITATIONS The materials encountered on the subject site and utilized in our laboratory testing program are believed to be representative of the area. However, soil materials may vary in characteristics between excavations. Since our investigation is based on the site materials observed, selected laboratory testing, and engineering analyses, the conclusions and recommendations are professional opinion. These opinions have been derived in accordance with current standard of practice, and no warranty is expressed or implied. "Report of Geologic Inspection, Recently Graded Cut slope at 22702 Timbertop Lane, Diamond Bar, County of Los Angeles, California", by Evans, Goffman & McCormick, Inc., Job No. 76-139, dated November 3, 1976, "Additional Geologic & Soil Report, Tract 30578, Lot 130, Diamond Bar, County of Los Angeles, California", by Robert Stone & Associates, Project No. 68-301L, dated April 4, 1969. "Fill Ground Report, Tract 30578, Proposed Tract 30578, Diamond Bar, County of Los Angeles, California", by Robert Stone & Associates, Project No. 68-301 N, dated April 10, 1969. "Monthly Report No. 1, Geologic Inspection and Soils Engineering Certificate, Tract 30578, Diamond Bar, County of Los Angeles, California", by Robert Stone & Associates, Project No. 1- 68-301 MR -1, dated May 8, 1969. "Soil Engineering Report on Compaction testing, Tract 30578, Lots 1-188 and Tract 30289, Lots 6, 8, Diamond Bar, County of Los Angeles, California", by Robert Stone & Associates, Project No. 1-68-301-10, dated November 5, 1970. 576 E. Lambert Road, Brea, California 92821; Tel: 714-671-1050; Fax: 714-671-1090 FIELD INVESTIGATION Subsurface conditions were explored by excavating seven test pits to@maximum depth of 15.0 feet otapproximate locations shown on the enclosed Site Plan (Figure 7). Upon completion of excavation, the test pits were backfilled with onsite soils that were removed from the excavations. The GXCaVRtOD Of the test pit was supervised by an engineering geologist, who logged the trenches and visually classified the soils in accordance with the Unified Soil Classification System. Ring samples were taken at frequent intervals. These se[np|eg, were taken by backhoe S80p|er. and obtained by driving a ring sampler with successive b|OVVS Of 140-pOUDd hammer dropping from a height of 30 inches. Representative undisturbed samples of the subsurface soils were retained in a series of brass rings, each having an inside diameter of 2.42 inches and a height of 1.00 inch. Ail ring samples were transported to our laboratory. Bulk surface soil samples were also collected for additional classification and testing. "Saw'"s U During the subsurface exploration, QCI personnel collected relatively undisturbed ring samples and bulk samples. The following tests were performed on selected soil samples: Moisture -Density The moisture content and dry unit weight were determined for each relatively undisturbed soil sample obtained in the test borings in accordance with ASTM D2937 standard. The results of these tests are shown on the boring logs in Appendix A. Shear Tests Shear tests were performed in a direct shear machine of strain -control type in accordance with ASTM D3080 standard. The -rates of deformation were 0.001 inch per minute. Selected samples were sheared under varying confining loads in order to determine the Coulomb shear strength parameters: internal friction angle and cohesion. The shear test results are presented in the attached Figures. Corrosion Potential Chemical laboratory tests were conducted on the existing onsite near surface materials sampled during QCI's field investigation to aid in evaluation of soil corrosion potential and the attack on concrete by sulfate soils. These tests are performed in accordance with California Test Method 417, 422, 532, and 643. The testing results are presented below: Sample Location pH Chloride (ppm). Sulfate (% by weight) Min. Resistivity (ohm -cm) TP -3 @ 0-3' 7.95 72 0.0590 850 Expansion Index Expansion Index tests were conducted on the existing onsite near surface materials sampled during QCI's field investigation. These tests are performed in accordance with ASTM D-4829. The testing results are presented below: Sample Location Expansion Index Expansion Potential TP -3 @ 0-3' 68 Medium aMOTUMIMP 'MIXIVINT&A Slope stability analyses have been performed for the proposed slopes. Selection of coulomb strength parameters used for the analyses were based this investigation and evaluated in light of past experience. A summary of these strength parameters are presented in the following table: A summary of the stability analyses and corresponding . preliminary geotechnical recommendations are summarized in the following table, and sections and calculations are presented on the following plates. Calculated Conditions Unit Weight Friction Angle Cohesion Material (pcf) (Degree) (psf) A row of caissons spacing at 5 feet and A -A' Static/Seismic Static/Seismic Surficial Soil 125 28/28 270/270 Bedrock 125 32/34 360/480 A summary of the stability analyses and corresponding . preliminary geotechnical recommendations are summarized in the following table, and sections and calculations are presented on the following plates. Calculated Conditions Safety Factor Conclusions and Recommendation Static/Seismic Existing Slope Along, Section A row of caissons spacing at 5 feet and A -A' 1.500.32 embedded at least 3 feet below grade should be constructed. Existing Slope Along Section B -B' Stable as planned Surficial Slope Stability 1.57 Stable as existed Mayuko Nakajima Associate Planner GAgRIEL.F.NO LAND OF MI55ION INDIAN5 - KIZN NATION Historicab Gown as The `,�,t"an Gabriel F)and of Mission Indians recognized by the State of California as the aboriginal tribe of the Los Angeles basin RE: AB52 consultation response for Tribal Consultation Request for Tentative Parcel Map 72035 located 22702 TFmbertop Lane, Diamond Bar, CA 91765 Dear Mayuko, Dec 1,2016 Please find this letter in response to your request for consultation dated Nov 16,2016. I have reviewed the project site and do have concerns for cultural resources. Your project lies in an area where the Ancestral territories of the Kizh (Kitt) Gabrieleno's villages adjoined and overlapped with each other, at least during the Late Prehistoric and Protohistoric Periods. The homeland of the Kizh Gabrieleno was probably the most influential Native American group in aboriginal southern California (Bean and Smith 1978x:538), was centered in the Los Angeles Basin, and reached as far east as the San Bernardino - Riverside area. The homeland of our neighbors the Serranos was primarily the San Bernardino Mountains, including the slopes and lowlands on the north and south flanks. Whatever the linguistic affiliation, Native Americans in and around the project area exhibited similar organization and resource procurement strategies. •Villages were based on clan or lineage groups. Their home/ base sites are marked by midden deposits often with bedrock mortars. During their seasonal rounds to exploit plant resources, small groups would migrate within their traditional territory in search of speck plants and animals. Their gathering strategies of ten left behind signs of special use sites, usually grinding slicks on bedrock boulders, at the locations of the resources. Due to the project location and the high sensitivity of the area location, we would like to request one of our certified Native American Monitor to be on site during any and all ground disturbances (including but not limited to pavement removal, post holing, auguring, boring, grading, excavation and trenching) to protect any cultural resources which maybe effected during construction or development. In all cases, when the Native American Heritage Commission states there are "no records of sacred sites in the project area" the NAHC will always refer lead agencies to the respective Native American Tribe because the NAHC is only aware ofgeneral information and are not the experts on each California Tribe. Our Elder Committee & .Tribal Historians are the experts for our Tribe and are able to provide a more complete history (both written and oral) regarding the location of historic villages, trade routes, cemeteries and sacred/religious sites in the project area. While the property may be located in an area that has been previously developed, numerous examples can be shared to show that there still is a possibility that unknown, yet significant, cultural resources will be encountered during ground disturbance activities. Please note, if they haven't been listed with the NAHC, it doesn't mean that they aren't there. Not everyone reports what they know. The recent implementation ofAB52 dictates that lead agencies consult with Native American Tribes who can prove and document traditional and cultural affiliation with the area of said project in order to protect cultural resources. However, our tribe is connected Ancestrally to this project location area, what does Ancestrally or Ancestral mean? The people who were in your family in past times, Of, belonging to, inherited from, or denoting an ancestor or ancestors httn://www. the&eedictionarv. com/ancestral. Our priorities are to avoid and protect without delay or conflicts —to consult with you to avoid unnecessary destruction of cultural and biological resources, but also to protect what resources still exist at the project site for the benefit and education of future generations. At your convenience we can Consultation either by Phone or Face to face. Thank you With respect, Andrew Salas, Chairman cell (626)926-4131 Andrew Sales, Chairman Albert Perez, treasurer I Nadine Sales, Vice -Chairman Martha Gonzalez Lemos, treasurer II Christina Swindell Martinez, secretary Richard Gradias, Chairman ofthe council of Elders ro box 393 . 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FOR SUBDIVISION PURPOSES NOVEMBER 8, 2016 A� \ SCALE: 1'F=30' (sTSEE tucV'irn ' R EEj�rnsEUErrtroM I -.t { �' ' Ao/'9/�OS`� - Y \ I L". r `AP, `r f�eoi 11� 111 4E. �"�"�.'„ ��' �'��'./'�'.! lyj .\ K \...:��' a,,,. s T \\ \ • � �. '�.,:,. W`� Nu�� I` . 11, , °r•.'�=,�-=�.3,� L _ 44z,'/'�t ..�.i;', �` '.'} as p \ 1 \�ox�i A �(�, 111 '�N Ij '�a � j'4• ' ' <\� °' ��\�•! .r ,�� i� Aa 7. 41, J i I V GROSS 53;580 SF (1.230 AC) NETg44,1995F(1,015AC) �„ 11� vRl l 1 I f .:•: \4 wr•• J, ,; �c ' \ 'ew :c:• It .��.'. �." GR OSS'•6.4,297 SF {1.476 _A. •\ \\ ; A NET 60,557 SF (1:340 .\ �� I� '1 1 111, 1/ ' I 1 � r�tP n"E, f- �_ n"�' `•' C,, 6WYii] illli SETT i I :.I.,@Ell AbA �v Ie I ; p T � I. I .1 i •�. � �' I T - \ \ PROPOSED/CONCEPTUAL EARTHWORK QUANTITIES: OUT AND FML AMOUNT IS ESTIMA TED mcv.. ACTUALLY AMOUNT MAY VARY DUE TO OTHER UNKNOWN FACTORS. (SITE CONDITION, WE, ENGINEER' 5RECOMMErDAT CX.) PARCEL .1 0 cY. FILL O a,_ TOTAL— CY. EXPORT O C1, PARCEL! CUT 4.60515 Cy. FML335M Cy. TOTAL _4-11 CY, EXPORT) 2T� OII3 CY_ PARML 3 CUT 1143945 CY_ FII. 0 CY. TOTAL 1143945 CY_ DOT 11439,45 CY_ AVERAGE SLOPE: PARCEL AVEM6E5LOPEOFMOISIMCIEFOREHIAOP631 % SLOPE- OD0296xM _ OD0296,5-1 :3i�. A 38 PARM 3 AV ERAGECWPEOFPROPERTY8EFORE&RAOING34 % 5LDPE: 0.00296x M 0.00296A5,zZW : 34'. A TDO ` AC —1. H W Ijll IP=' 311 GR055: 65,326 5F( 1.500 A) / wP - t • �� \ 4' I I I I NET: 60388SF 2.386 AC) D / • �---_— E—" _ -- — -- ..y—ExwrTn ----- -- I '— a»rTm--- P/ ,� \ I� 1ii Nlezil^w TrPe•ro'9S-:P ,tiF• :-/L___''i1?F{52'SS�,C®•,90. ".. aS.. .gyp, tri iW I' 1 ABBREVIATIONS: AC-__. Atph. t FamrttA CLF._ Chan L'nikcd F— CONI _ C,-1. DIA --- Onw,9y A,,-, am.__.. Oris ay EP --- UX -p% E%..____. E,'stig FF_H, FA1 Fbm Ek -m F� Fin Hydmn FL ____. A. L'ne Eewtbn PW ____Pbnt Wal RW — Rna,ng Wd TC Ta o cv TW _�.. Top of Wu lI Ee�+a yr WM__.._WaHa .M, WV_Worm valor ETV)._. — ._. Edgc of TmKkd Woy LEGEND: 29501 -. ExuN,gEl— ..295 C . Gmmd FommrLrc I_. E,. StruO:rc Edtma Pok fj .,____Fre HJdram 64 L'gM Ex. Tees• Ex. Trss T. So Rsmmrd Ex MANHOLE ,-A— EX. RErAIMNG WALL NOTE: (D VARIABLE WTOM MUTUALLY EXCLUSIVE RESERVE EASEMENT FOR EGRESS AND EGRESS PURPOSES,8Y DOCUMENT RECORDEOAU61,1979,A5 INSTRUMENT N O.79A48036, OR i :111' 1 I A"rciMmN ' J/�. HEIGHTS ORI11E S- ~ TE: � •�+F.M'' '• AVERAGE PARCEL WIDTH: EASEMENT NO UTILITY NOTE: ND WIDTH OEPR4 ®3FEETWIOE EASEMENTOFGENERAL ®VARLABLEWCOMMUTUALLY 01OFEETWIDEEASEMENTOF 050.00WIDEFUTURE © SLOPE EASEMENT TO ITE COUNTY TE.EPHONECOMPAWOFCALIFORCA.A EXCLUSIVEEASEMENNT FOR SOUTHERN CALIFORNIA EDISONI STREETPEF TRACT NO. OFLOSAN6ELESF019OPE UTILITY LIELDC.4TION1 11A7 L. F. ]96' CORPORATIONI,fOR THEE TRANISMI55IW,IOF INGREyB AND EGRESS COMPANY,FORPULICUnUES 3m"%.6765/14'3T0 PURPOSES. PER TRACT NO3D576, NEEDS TO BE VEIff1ED ELECTRIC ENERGY FOR COMMUNTCA TION AND PURPOSES, DY DOCUMENT PURPOSES, BY DOCUMENT RECORDED BEVAUTEtl PER M.0,785/1.25 TO BE VACA TED PER DY CONTRACTOR. PARCEL! 144 378 OTHER PURPOSES.8YDODJMENTRECORDED RECORDED AUG 1, 1979, A5 MARCH 12, IWC. AS INSTRUMENT PD. SEPARATE DOCUMENT. SEPARATE DOCUMENT. PARCEL] 165' 30]' JUNEM.W69ASIISTRUMENI'NO. U!PTIN D* UMENTNO.794148035. 2124, OR GOOK D-4400, PAGE B. OR OR TIE PROPOSED VACTH A TION PROCESS OF E FU MR-9TR SWEET AND SLOPE PURPOSES EASEMENTS WILL OE CONDUCTED CONCURRENTLY WITH THE PROCESSIGOF THE TENTATIVE PARCEL MAP. TMS VACATION WILL RECIUpE REVIEW AND APPROVAL OF THE LEGAL DESCRPTIIONNS, PDTIFTUTIOM TO UTILITY COMPANIES OF THE PROPOSED VACATION AND CITY COUNCIL APPROVAL I `T' IYe•OChUUMi VICINITY MAP NOT TO SCALE N GENERAL NOTES: PROJECT. 3 PARCELS SUBDIVIStMe 22702 T-SERTOP LANE. DIAMOND DAR, CA 91765 ZONE (PRESENT):RI-20000• (RR) ZONE (PROPOSED):R!4WC0'too) ASSESSOR PARCEL NO: 8713-028012 OWNER USA RDNGCHEN DEVELOPMENT, INC TEL:(W9)8604888 EMA d :CFYONGP—MEFO`IED=M LAND SURVEYOR MAHMOUD XMUU 5AMANI• LS.8)66 TRITECHH ENGINEERING ASSOCIATES, IC 135 N. SAN GABRM7. MYS, CAN GABRIEL CA 91M TEL: (626) 5]0.1916 FAX: (626)-7P 8786 PARCEUHOUSE DATA: E%SITNG TOTAL AREA: GROSS:183203 SF (42% AC) NET: 165J40 Sit (3.111 AC) PARCEL I: (EXISTING HOUSES ANG —LYRES TO REMAIN) GROSS: 6.1,29) SF (IA76AC) NET: 60357 SF (UMAC) PARCEL L 60.055: 65,326 SF (1300 AC) NET: 60,3885F(LVIli AC) PROPOSED W OPo DWU 8AEEME•NTAREA - 1,4205E 611ND [1.001 LIVING AREA _'i ..... SECOND FLOOR LIVING AREA : 1!5% SF TOTAL LIVING AREA -TAM W PARCEL 3: GROSS: 53AM EF (1230 AC) NET: 44JM SF (1015 ACI IMPOSED HOU BASEMENT AREA E 1,6205E 6ROUNND FLOORUVI4 AREA -5JWEF SECONNDFLOORUVINGAPEA -47.10,3 TOTAL LIVING AREA = 10.900,F UTILITY: ELECTRICITY: 5 W MEAN CAUFORNCA EDISON 1.800.654555 SEWAGE: THE SANITATION DISTRICTS OF LOS ANGELES COUNTY (562)908-0l99 TELEPHONE: VE IRON 1.800.483-1DD GAS SCIF ERN CALEFORWI SAS COMPANY 1.000.4274X00 WATER: WAUNUT VALLEY WATER DISTRICT 1.626964-0551 CABLE: TIME WARIER CABLE 1-886.692-m3 LEGAL ACCESS NOTE: THE LAND OF TRIS PARCEL MAP HAVE LEGAL ACCESS, I PARCft1 OU64,1 TTOMRTOP LANE BLAZE TRAM. LAZY MEADOW OR ALAMO HEIGHTS, STEEPLE O4A5E IN, SHADOW CANYON (ALL PRIVATE STREETS) TO PUBLIC STREET DIAMOND BAR BLVD. INGRESS AND EGRESS RIGHTS TO ANMD FROM TRE EASEMEIT FOR PARCE.I SHALLBE MAINTAINED OY BOTH PARTIES 2 ALAN HROUSM I.— MEADOW OR. ALAMO!EIGHTS, STEEPLE CM GE UN, SHA DOW CANYON (ALL PRIVATE STREETS) TO PUBLIC 5TRLET DIAMOND MAH BLVD. THE ACCESS IS ESTABLISHED ANMD 6MNTE0 VIA LAZY MEADOW DRIVE 8V THE HOMEOWNERS ASSOCIATION RECEIVED JAN 2 6 2017 ABBREVI ATI ONS: LEGEND AC-.._...AVIdl Ozzoele G0... 10IWIn pools) _.-..-t31d In9Owotlon mv._.—Cone. mods MIM --Rpt--�Fa.Gab Oxl olr Ure TOTAL 0 C.Y.; D(FORT 0 C.Y., 0/A._._... U.—Y Appron WTI..-,_.. 01dm9e Moabde —"-O— ^ .� Wrau6hl I rm Fexe OS. �.,...Omngnul '��^�, Ek, Slrlslure DWY........O—ItiY EP.....^...Etliwnlae 1 •-•_Rre UYtlr NY. QMii.!!!' «...,..—..615111, _ • . ---AIM rtl.^.._.— y, hll �y�yFFF'I`m —Aron Uljn ` -USS. FL..�... FlovU Oevtlia, IN -- heti of Wtll SHEET 1 OF 2 I Nv........Oss Vdve IN......^..Il1 Oe— 10, R,A......... Rarter Area BL..._._.Rw1+lY0wiJwY Ure ®—._Spry R+rV P7MT....... SIW......Sld.l k — hl SMU.._Spd h bde —� ._Rep Flow Unelw S,rda TC....._ Top d Orb Oevoilon T0.—._.TopolGdl _.Rop Sheet Fluv TW......... Top d Oevdlon —1. ,___ —A—D, t. .^._...W. er Mel er ..,.:... W der Vtive =--W.. 1f _Area Ordn QI CAO._ -._..Orb h Oiler SEL -TION A A -1 1.— > l.' .. SLOT WItE 'y X F r� X L RPE •I1]fl(TieP ' .IIX AC IOCE 'IMPACT CU 9 5• N0. •1 BNS b I I SIU, CUSS •120-G2000 CONCRETE SECTION Y -Y RIVV UNt4CUT® RRVP 3i011F® flfflw e' WNL P,VG AF --i m JS7RFI J'P 5 0.501 p. A0 FS IX ROW •IMPACT QIFi3 SECTION X X RIPRAP AND HEAD WALL DE"AIL NOT IOSCALE / S, P G •FIRM F ANTER WAIL 11'.M.1p10 W.M. v 2.5. T� 5'P.GG B'z 1p' "W.M. \ 2.5' 2' CONCF>EtE GUTTER DETAIL „pr Ippp.,E EARTHWORK QUANTITIES: CUT AND FILL. AMOUNT IS ESTIMATED ONLY. ACTUALLY AMOUNT MAY VARY DUE TO OTHER UNMVOVYN FACTORS. (SITECONDITON, SOIL ENGINEER S FE -COMMENDATION) PARCELI LEGAL DESCRIPTION: OWNER- USA Roriphen D aI pmeM INC. LOT 130OFTRACTNO. 70578, IN THE CITYOF DIAMOND OAR, COUNTY OF LOS ANOELN% 21614 Fchwind LN, STATE OF CALIFORNL\,AS PER MAP RECORDED DIAMOND BPR, CA IN ROOF: 795 FADES 1.25 OF MAPS, IN THEOFFICE TEL:909-860-2858 OF THE COUNTY RECORDER OF SAID COUNTY. CUT O C.Y.; FILL 0 C.Y.. TOTAL 0 C.Y.; D(FORT 0 C.Y., PARCa-2 NARK DESCRIPTION GATE CUT 4,605.15 C.Y.; FILL 335.02 C.Y.. TOTAL 4,940.17 C.Y.; B(PoFTr 4,270.13 C.Y.. PARCB- 3 22 A T¢vD BAP, CA 9176 DIAMOND BAP, 9(765 CUT 11,439.45 C.Y,; FILL 0 C,Y.. TOTAL 11,439.45 C.Y.; EmRr 11,439.45 C.Y. SE07nON B -B NOTM SCN-E 'CNCULA7ING AVERAGE STORE SDi> 0,0022909L 1= CONTOUR INTERVAL IN FEET A L=SUMMA l70N OF U3JOM OF PLL QONIOIFS I AREA IN NET ACRES OF PNCE- BONG DOerS08PED USING T1IEASOVE FOPMULN FOR PFCUECI-SRE B L= 8,486.67' A. 3.84 AC. STORE= 0.002208 z5 xU ABB.B7 3.BA SLOPE- 32.71% T -E AVBVM=PE FOR TFE ROJECT SNE IS: 32.71 ".o THIS SIOM ANALIIS IS BASE) ON TFETOFOGR O MAP LEGAL DESCRIPTION: OWNER- USA Roriphen D aI pmeM INC. LOT 130OFTRACTNO. 70578, IN THE CITYOF DIAMOND OAR, COUNTY OF LOS ANOELN% 21614 Fchwind LN, STATE OF CALIFORNL\,AS PER MAP RECORDED DIAMOND BPR, CA IN ROOF: 795 FADES 1.25 OF MAPS, IN THEOFFICE TEL:909-860-2858 OF THE COUNTY RECORDER OF SAID COUNTY. SUBDIVISION LAND SURVEY CIVIL ENGINEERING &DESIGN ASrss b. SAn Wpq EL BLvp EkOINEERINTRITECN snp a�pq EL,aams AASSOCIATES TEY luxe) s>o 17te FAx� Fexel7a:.eroa SSOCIATES Ernam ldouvuernscocmmrpe REVIEWED FOR THE CITY BY: CITY OF DIAMOND DAR APPROVAL: qry tNCINEQt R.C.E. GATE CONCEPTUAL GRADING PLAN NARK DESCRIPTION GATE E 1'20' DRAWN BY: Sh1rtH Ms.10/26/2016 RVASED• 22 A T¢vD BAP, CA 9176 DIAMOND BAP, 9(765 GATE SHEET 1 OF 2 JOB N0. 150919 l _- 1 nrEWL I SCALE. • 1'--9n' rI (GO 7fl i ! r6U/)z. 1/If1 It 1_.,. 1 �% 7E1 �• Iszi.3H J 1/ i -' i i \ � . \ � r )�,z3) ��,, <`�' r6D.EE@j yc'� D{ ..,�\ Vis 3.4s, .16 00,75) --/ tGI o6a Iv I I i ! l / � IGU2E� lI ) - G "� 1 1 P"q5 v7 "l 6 H,)' '> / iUfla 1 up �! µ'ms✓^_.=h $l� 1 I ` I •� � ( ! ( (77�.H) ., (S93 !•d) /( �E �5.�"r) S B[uD -_769) ""'•/. .•`"'••�ztvey-dtlusroziv rror cm�,S,.a Py'7 c a, .o svnv - .. ..t / jj(/,, •t5 RP/ o')tv r+ � -.•..... r t '- — — �- 5�,>L) , Ct a {; ): , "n (547.)% -r•."•a a� afry _ 1.19 rr� L � j n' ai �� .... ..._ r.�, .... WF�c -(515) 'v s s /. -"'i • �[�+ J)i \ ti a "'',°,7/e ^r.. -y C (9-..q9.1� ti.flf)) f 3 6sr r/� € j I I ( sr) � /(596.4s) h� j i , �i " !'911 >_) •\) / f E 1 7 061 r 121 8 r 1 J cJ - W rrnJ x o rw ,♦ E9.6e1 \ . \ \ `C'xEn r / gH.91,) ••\ �•- 8' 1115 8 '�... I i 1«yl ,.6�_G) - �♦ \ l5) ` 17j 111 �7 N� _ I i.f.aa •♦ \ ( 7. vG.�D) 5 5 * .E \ f i«' In' ♦a .... z 9t ;3) "arc' V I151U.:1di C u o ' ♦♦ .. � 9T1.9p.r'"'-"�a 40.9iI K3.i5 �,? 2� v • q - S (( �'.: 17t I'sa . 1' �Ftz1DOR ♦``N > -k, 2"t{r.56j s. PA05t2 .' ♦ III ir1. r3 (i a K<; FFS� (/ 0350 ��� :L` 3' .��'' PARCEL,'.I r t III I 1, S P 3.0 '. 58977) 6 I � B) . . ( - 0 "'•"".�'l-�.....m.. � r..a..,...., ♦ / --�5 i 977 \ I � , .\ .... �. iI �._ -t50 � lam# 1 ... (�_`.�t-__:_ v_ ♦` \ �r 4 ' _.- 4���l V ♦ / � �� It 7Ms r?4" m' III ` � : a ? 7 ---_ - \ - •a\ 111 d n I :: .... Q s."o Zi. '•, l . rrrma ce+v � 7!': 8.a\(� 57 1 __ .. .. { 'Iii ..'•' ' I II.9,..: - ``•? r"Cj (5 674. (57 ).1 ��...... .• U1 -, '♦tiV\ / r , 5.1 - y 79) S ' 2 ..(.61.75).,\j (6'y}.. II 4)II �. $:qC 1 W r a. •S)r„yo rso c �t\ � w x+ j�� RC EL N'9 K ( 1 7 3 i' M`\ Y r bl Y < -(SGr =i) ( t 1�1.19 a9r ' (( 111111; : g I I v V m Ifr Pao°5 of ) y r•2c ,.i u Ill ri \ 5I�..'(S17' rel .aa ao ny, I s CE) (5f 3.29) 110 U a b2 \ 6G fi3j ry0 4 III , (567.721 h 11 a � V I �--, 1' metcahtvetm r al Y U .b 7 I NIP°._J lye I' 1( 137 JN'If .. �- - i _� {'IOP BBV 'It3Ytl - �Ne1F1:tYW� _. �,� y aJ=_ (35.07)n>..r��i IU N u;D9_a1 rmea•cw i -11- --" � . -11 .1 . - - -- - H LEGAL DESCRIPTION: � LOTlODP BAR, COUNTY INTREC{TES, DUAIDND DAR,COUNTY OF LOS ANGELES, STATE OF CALffORN G1,ASP[R A[AP RECORDED IN BOOK 785 PAGES t-25 OF MAPS IN TIIEOFFICE OF 7T{ECOUNTY RECORDER OF SAID COUNTY. OWNER: USA Rongch- Dwdopmont INC. 21814 Fdrrind W, D4WOND EPFT, C4 TEL:909-860-2880 SUBDIVISION LAND SURVEY CIVIL ENGINEERING &DESIGN ' las n. srn Gnvn EL o7vD TNGINE my wea E7,aoms ENGINEERING :� loxal no-mla rnx: texo7>a: s>ae AssoaaTEs o,a17 REVIEWED FOR THE CITY BY: CrrY OF DIAMOND BAR APPROVAL CONCEPTUAL GRADING PLAN SCAtE: 1��20' _ IMAYM BY: 6hi)iFl ONB 10/26/2018 REVISED: 22702 DIANIO vIBERTO PLANE, DIAhfOND BA CRY ENGINEER R.C.E. DATE R, CA 91765 SHEET 2 OF 2 aDR No. 150919 NARK OFSCRIPifON DATE _ DATE NYVAL61 2 Q F-111 Ivi Eel Fil L� I 9XAJ 2 2 J1*A*Z:9C1 JTJ I IL JLNJJJ-J'L�L STATE OF CALIFORNIA COUNTY OF LOS ANGELES CITY OF DIAMOND BAR 1, Stella Marquez, declare as follows: On February 14, 2017, the Diamond Bar Planning Commission will hold a Regular Meeting at 7:00 p.m. at City Hall, Windmill Community Room, 21810 Copley Drive, Diamond Bar, California. I am employed by the City of Diamond Bar. On February 10, 2017, a copy of the Planning Commission Agenda was posted at the following locations: South Coast Quality Management District Auditorium 21865 East Copley Drive Diamond Bar, CA 91765 Diamond Bar Library 21800 Copley Drive Diamond Bar, CA 91765 Heritage Park 2900 Brea Canyon Road Diamond Bar, CA 91765 I declare under penalty of perjury that the foregoing is true and correct. Executed on February 10, 2017, at Diamond Bar, California. 9 � Stella Marquez C D:\zstel I a\affi dav i tposting. doc VOLUNTARY REQUEST TO ADDRESS THE PLANNING COMMISSION Y'l, "li ( AGENDA ITEM: G SUBJECT: TO: Planning Commission DATE: SPEAKER NAME: ADDRESS (Please'print clearly) (Please print clearly) 11 / would like to address the Planning Commission on the above stated item. Pleas have the Commission Minutes reflect my name and address as printed above Signature Note: - This form is intended to assist the Chairman in ensuring that all persons wishing to address the Commission will have the opportunity to do so, and to ensure correct spelling of names in the Minutes. After completion, please submit your form to the Planning Commission Secretary. Thank you. VOLUNTARY REQUEST TO ADDRESS THE PLANNING COMMISSION .3 AGENDA ITEM: SUBJECT: TO-. Planning commission SPEAKER ///zL, � " NAME: (Please print clearly) (Please print DATE: would like to address the Planning Commission on the above stated item Minutes reflect my name and address as printed a ove Signature Please have the Commission Note: This form is intended to assist the Chairman in ensuring that all persons elwlingishinog names to addrinesthes theMinutes. Commission. will have the opportunity to do so, and to ensure correct spf After completion, please submit your form to the Planning Commission Secretary. Thank you. VOLUNTARY REQUEST TO ADDRESS THE PLANNING COMMISSION AGENDA ITEM: TO: planning Commission SPEAKER NAME: ADDRESS: (_Piease printclearly) (Please print SUBJECT: DATE, c2 10' ­_ 1 -7 (2 r would like to address the Planning Commission on the above stated item. Please have the Commission Minutes reflect my name and address as printed abo a *Ci_' ureL,/ Note: This form is intended to assist the Chairman in ensuring that all persons wishing to address the Commission will have the opportunity to do so, and to ensure correct spelling of names in the Minutes. After completion, please submit your form to the Planning Commission Secretary. Thank you. VOLUNTARY REQUEST TO ADDRESS THE PLANNING COMMISSION AGENDA ITEM:— - -SUBJECT: suer_)1v-1,s-nJ - TO: Planning Commission DATE: 07 11,4 1-1-7. SPEAKER NAME: 11 --T-11LL (Ew cT Les -Z-7- (Please print clearly) Z> 4-�vz,2E- Diz ADDRESS: WG (Please print clearly) / would like to address the Planning Commission on the abjov)ttatted item,. Please have the Commission Minutes reflect my name and address as printed above,' Signature Note: This form is intended to assist the Chairman in ensuring that all persons wishing to address the Commission will have the opportunity to do so, and to ensure correct spelling of names in the Minutes. After completion, please submit your form to the Planning Commission Secretary. Thank you. Bradley D. Walker 17821 East Seventeenth Street David E. Cane Suite 140 James C. Harkins, N Tustin, CA 92780 Telephone (714) 573-8990 Facsimile (714) 573-8999 February 14, 2017 City of Diamond Bar Planning Commission 21810 Copley Drive Diamond Bar, CA 91765 bwalker@lin'kline.com deane@linkline.com jharkins@linkline.com File No. 30936-001 VIA HAND -DELIVERY & E-MAIL planning@diamondbarca.gov grace.lee@ci.diamond-bar.ca.us david.alvarez@ci.diamond-bar.ca.us Re: Diamond Bar Country Estates Association / USA Rongchen Development, Inc. Case #: Tentative Parcel Map No. 72035 (Planning Case No. PL 2016-01) Agenda #: City Agenda Item No. 7.1 for February 14, 2017, Planning Commission Meeting Property: 22702 Timbertop Lane, Diamond Bar, CA 91765 (Assessor's Parcel No. 8713-028-012) (The "Subject Property") Subject: Opposition To Proposed Subdivision of The Subject Property To the Honorable Members of The City of Diamond Bar Planning Commission: Cane, Walker & Harkins LLP serves as legal counsel to the Diamond Bar Country Estates Association. In that capacity, the Association requested our office to submit this opposition to USA Rongchen Development, Inc.'s ("Property Owner") application to subdivide the Subject Property referenced above (the "Application"). As described in Agenda Item No. 7.1, Tritech Associations, Inc., on behalf of the Property Owner, applied to subdivide the Subject Property into three residential lots (the "Subdivision"). As described in more detail below, the Association objects to and opposes the proposed Subdivision of the Subject Property, because the Subdivision is in violation of the Association's Declaration of Covenants, Conditions, and Restrictions, recorded in the Los Angeles County Recorder's Office on June 7, 2005, as Instrument Number 05-1328841 ("Declaration") and other governing documents. Therefore, the Association respectfully requests the Planning Commission to deny the Application. The Subject Property is located within the Diamond Bar Country Estates Association development ("Development") and is subject to the Declaration. In this regard, Article 11, Section 1 of the Declaration provides, in pertinent part, as follows: "No residential Lot may be subdivided or partitioned without the prior written consent of the Architectural Committee and approval of the City of Diamond Bar ...." Diamond Bar Planning Commission February 14, 2017 Page 2 By letter dated May 2, 2016, the Association served the Property Owner with written notice of the Association's disapproval of the Property Owner's proposal to subdivide the Subject Property. (A true and correct copy of the letter is enclosed herewith.) Therefore, as the Association did not provide written consent to the Property Owner to subdivide the Subject Property, pursuant to the Declaration, the Property Owner is prohibited from subdividing the Subject Property. In addition, pursuant to the Association's authority under the Declaration, the Association adopted Architectural Rules and Regulations governing, among other things, subdivision of Lots in the Development. The Architectural Rules and Regulations ("Rules") provide, in pertinent part, as follows: "20. Subdividing a Residential Lot. Consistent with Article II, Section 1 of the CC&Rs, the Association's Architectural Committee shall have the authority to approve or disapprove a subdivision of any Residential Lot into two j2 Lots; considering the following criteria: c. All Lots created by the subdivision of the Residential Lot Shall: (i) consist of a minimum of one (1) acre or 43,560 square feet; and (ii) have one hundred feet (100'1 of road frontage on an existing Diamond Bar Country Estates street easement...." (Emphasis added.) The Property Owner's Subdivision Application proposes to subdivide the Subject Property into three 3 Lots in violation of the Rules, and Parcel 1 of the subdivision is identified as having less than one hundred feet (100') of road frontage on an existing Diamond Bar Country Estates Association street easement in violation of the Rules. CONCLUSION Accordingly, based upon the foregoing, the Association respectfully requests that the Planning Commission disapprove the proposed Subdivision, until such time the Property Owner complies with its legal obligations under the Declaration and Rules, and the Association provides its written consent to the Subdivision, as required under the Declaration. Diamond Bar Planning Commission February 14, 2017 Page 3 The Association appreciates the Planning Commission's consideration of the foregoing in its review and determination of this matter. If you have any questions, please do not hesitate to contact the undersigned Very truly yours, CANE, WALKER & HARKINS LLP , PIUMM James C. Harkins, W JCH enclosure cc: Board of Directors May 2, 2016 USA Rongchen Dev 22702 Timbertop Lane Diamond Bar, CA 91765 Re: Architectural Modification — Not Approved Thank you for your recent plan submittal for. Unfortunately, the Architectural Committee is unable to approve the plans as submitted. Please address all of the items noted below and re -submit your modified plan to be reviewed again: 1. Parcel 1 does not have enough street frontage length to be a Lot recognized by Diamond Bar Country Estates. I A single existing Lot may only be split into 2 Lots. All fees and legal documents between the Lot Owner and the Association are to be completed and recorded as required by the Architectural Rules for Subdividing a Residential Lot, Send certified letters of the proposed split to those neighbors that were not available to sign the Neighbor Awareness form. Should you wish to appeal the Architectural Committees decision, you may contact the Association office to schedule an appointment with the Board of Directors. The next Architectural Committee meeting will be held on June 9, 2016 at 2:00pm. Thank you for your patience and cooperation. If you have any questions please feel free to contact me at 909-861-4114 or at liz.asato(a)-seabreezemqmt.com. Sincerely, Liz Asato Assistant General Manager/ Architectural Coordinator The Country Estates Association The Country Estates Association 22615 Lazy Meadow Dr. Diamond Bar, Ca 91765 (o) 909-861-4114 (f) 909-861-2968 February 14, 2017 TO: THE PLANNING COMMISSION IT'S ALL ABOUT THE MONEY DIAMOND BAR IS A VERY UNIQUE CITY. OUR HOME SINCE 1976. SINCE 1979 WE HAVE LIVED AT 22505 LAZY MEADOW DRIVE. AT THAT TIME THERE WERE ABOUT 200 HOMES & ABOUT 500 VACANT LOTS. THE BEAUTY OF DIAMOND BAR & THE COUNTRY ESTATES ARE THE WIDE OPEN SPACES. PARKS, GREENBELTS, HIKING & WALKING TRAILS, "OPEN SPACES". RURAL LIVING, AS THE PROPERTY IS ZONED, RURAL RESIDENTIAL. UNIQUE TO THE COUNTRY ARE; EACH PROPERTY IS AT LEAST 1 ACRE, MANY PROPERTIES HAVE MANY ACRES. NO STREET LIGHTS. WHITE FENCES ON MOST PROPERTIES. A "UNIFINING" ELLEMENT. LARGE OPEN SPACES BETWEEN HOMES. A 132 ACRE NATURAL PARK. OUR FRIENDS, DON & MARGRET HORN LIVED ON TOMBERTOP FOR MORE THAN 20 YEARS. I HAVE BEEN IN THE HOME MANY MANY TIMES. THEIR 29 FOOT HIGH WINDOWS OFFERED A SPACIOUS VIEW OF LOS ANGELES AND THE SURROUNDING 4 ACRES OF OPEN LAND. THEIR HORSES ROAMED THE 4 ACRES. THE HOME WAS CALLED THE BI CENTINIEL HOME. 15 YEARS AGO THIS WAS TRIED. AS BOARD PRESIDENT, I STOPPED IT. 5 YEARS LATER, IT WAS TRIED AGAIN. AGAIN, I STOPPED IT. SINCE THEN, THE PROPERTY HAS CHANGED HANDS SEVERL TIMES. TIMES CHANGE. OUR ASSOCIATION NOW ALLOWS LOT SPLITTING, REMOVAL OF THE WHITE FENCES, AND MANY FAMLIES IN HOMES. I UNDERSTAND THAT I AM ONLY ONE PERSON TO OPPOSE THE SUB DIVISION. OUR ASSOCIATION NOW HAS ABOUT 900 HOMESITES AND MAYBE 48 MORE COMING. DOES EVERY PIECE OF GROUND HAVE TO HAVE A BUILDING UPON IT? VERY SAD. IT'S ALL ABOUT THE MONEY. THANK YOU, PAUL Akin 22505 LAZY MEADOW DRIVE