HomeMy WebLinkAboutRES 95-24RESOLUTION NO. 95-24
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF DIAMOND
BAR APPROVING AN ADDENDUM TO A FINAL MASTER
ENVIRONMENTAL IMPACT REPORT (SCH NO. 90010861) AND
APPROVAL OF VESTING TENTATIVE TRACT MAP NO. 47850, TO
DEVELOP A 57 UNIT SUBDIVISION, LOCATED IN NORTHERN
TONNER CANYON, WITHIN SIGNIFICANT ECOLOGICAL AREA NO.
15, SOUTHERLY AND EASTERLY OF STEEPLECHASE LANE AND
WAGON TRAIN LANE, IN DIAMOND BAR, CALIFORNIA AND
MAKING FINDINGS IN SUPPORT THEREOF.
A. Recitals
(i) Diamond Bar Associates, Inc. 3480 Torrance Blvd., Torrance, California,
(the "Applicant" hereinafter), has heretofore filed an application for
approval of Vesting Tentative Tract Map No. 47850 as described in the
title of this Resolution. Hereinafter in this Resolution, the subject Vesting
Tentative Tract Map No. 47850 shall be referred to as the "Application."
(ii) On April 18, 1989, the City of Diamond Bar was established as a duly
organized municipal corporation of the State of California. Thereafter,
the City Council of the City of Diamond Bar adopted, by ordinance, the
Los Angeles County Code as the ordinances of the City of Diamond Bar.
Titles 21 and 22 of the Los Angeles County Code, as amended, contain
the Development Code of the County of Los Angeles now currently
applicable to development applications, including the subject Application,
within the City of Diamond Bar.
(iii) The City Council of the City of Diamond Bar conducted duly noticed
public hearings on the project and its environmental documentation on
January 7, January 21, January 28, March 3, April 7, April 21, October
16 and November 17, 1992. The City Council additionally held
subsequent public hearings on the project as a part of a Joint Session with
the Planning Commission on April 6, 1995 and continued the meeting to
May 16 and May 17 and June 6, 1995 on the subject matter of the
Application.
(iv) The City of Diamond Bar lacks an operative General Plan. Action was
taken on this application, as to consistency to the 1995 draft General Plan,
pursuant to the terms and provisions of the Office of Planning and
Research extension of time granted pursuant to California Government
Code Section 65361.
(v) All legal prerequisites to the adoption of this Resolution have occurred.
B. Resolution
NOW, 'THEREFORE, it is found, determined and resolved by the City Council of the
City of Diamond Bar as follows:
1. This City Council hereby specifically finds that all of the facts set forth
in the Recitals, Part A, of this Resolution are true and correct.
2. The City Council hereby finds that the addendum to the Final Master
Environmental Impact Report (EIR) was presented to the City Council,
and that the City Council reviewed and considered the information
contained therein prior to deciding upon any aspect of the project, and
based thereon, so certifies that the addendum to the Final MEIR No. SCH
90010861 has been prepared for this project in compliance with the
California Environmental Quality Act (CEQA) of 1970, as amended, and
the guidelines promulgated thereunder. Further, the addendum to the
Final MEIR No. SCH 90010861 reflects the independent judgment of the
City of Diamond Bar. Additionally, the City Council certifies the
addendum to the MEIR is complete and adequate in that it fully addresses
all environmental effects of the project.
3. The City Council hereby specifically finds and determines, based on the
findings set forth below, that changes and alterations have been required
in or incorporated into and conditioned upon the project specified in the
application, which mitigate or avoid significant adverse environmental
impacts identified in the addendum to the Final MEIR No. SCH 90010861
except as to those effects which are identified and made the subject of a
Statement of Overriding Considerations which this City Council finds are
clearly outweighed by the economic, social and other benefits of the
proposed project, as more fully set forth in the Statement of Overriding
Considerations.
4. The City Council hereby adopts the Findings of Facts and Statement of
Overriding Considerations and Mitigation Reporting and Monitoring
Program attached hereto as Exhibits "A" and "B" and hereby incorporated
by reference.
5. The Applicant shall make payment of any and all fees which the
Department of Fish and Game may require to be paid prior to the issuance
of any building permit or further entitlement.
6. Based on substantial evidence presented to this Council during the above -
referenced public hearings, including written and oral staff reports, public
testimony and the record of the Application, this City Council hereby
specifically finds as follows:
2
(a) The Application applies to a parcel located southeast of the
intersection of Wagon Train Lane and the southerly terminus of
Steeplechase Lane, Diamond Bar, with a gross area of 73 acres,
within Significant Ecological Area No. 15, and is zoned R-1-
8,000, R-1-20,000 and A-2-2.
(b) Surrounding properties' zoning and land use to the north and west
is R-1-8,000, R-1-9,000 (Single Family Residence Zone) and C-R
(Commercial Recreation Zone) and is developed with single family
and multi -family residential, respectively; to the east the property
is vacant and Zoned R-1-20,000 (Single Family Residence Zone)
and; to the south the land is vacant and lies within the R-1-20,000
(Single Family Residence Zone) and A-2-2 (Heavy Agriculture
Zone).
(c) The Application is for a 57 lot residential subdivision to construct
57 single family units, private streets and a common open space lot
to be developed with a sewage pump station.
(d) The site is physically suitable for the proposed density of
development.
(e) The site is physically suitable for the type of development
proposed and has access to public highways and streets. Further,
the .property shall be served by sanitary sewers, provided with
water supply and distribution facilities with sufficient capacity to
meet anticipated domestic and fire protection needs and shall have
geologic hazards and flood hazards mitigated in accordance with
the requirements of the Los Angeles County Department of Public
Works.
(f) The design of the subdivision and the proposed improvements will
not cause substantial environmental damage or substantial and
avoidable injury to fish or wildlife or to their habitat, and while
the proposed development will have a significant adverse effect on
biological resources including flora and fauna due to extensive
grading activities associated with the implementation of the project,
air quality and emission levels due to traffic generation and
grading activities, and development of the site with land uses that
require the use of energy resources, mitigation measures have been
included as project conditions to reduce the impacts and a
Statement of Overriding Considerations has been made on these
unavoidable impacts.
_ (g) Neither the design of the subdivision nor the types of
improvements will cause serious public health problems, since
sewage disposal, storm drainage, public services and geological
3
and soils factors are addressed in the conditions of approval
appended hereto.
(h) The subject site lies within the County of Los Angeles Community
General Plan land use designation of Nonurban (1 du or less/ac)
and within the 1992 General Plan land use designation RR (Rural
Residential, 1 du/ac). The proposed map is consistent with the
1992 General Plan and is not in conflict with the current zoning
standards or with the 1995 draft General Plan, which maintains the
same land use classification of RR.
(i) The design of the subdivision provides, to the extent feasible, for
future passive or natural heating or cooling opportunities. The
design of the subdivision is based on the size and shape of the
parcel.
(j) The proposed subdivision does not contain or front upon any
public waterway, river, stream, coastline, shoreline, lake or
reservoir.
(k) The subdivision and development of the property in the manner set
forth on the map will not unreasonably interfere with the free and
complete exercise of public entity and/or public utility rights-of-
way and/or easements within the area covered by the map, since
the design and development as set forth in the conditions of
approval and on the tentative map provide adequate protection for
any such easements.
(1) The discharge of sewage from this subdivision into the public
sewer system will not violate requirements of the California
Regional Water Quality Control. Board pursuant to Division 7
(Sections 13000, et seq.) of the California Water Code.
(m) The housing needs of the region have been considered and
balanced against the public service needs of local residents and
available fiscal and environmental resources.
(n) On September 23, 1991 and November 25, 1991, the Planning
Commission of the City of Diamond Bar conducted a duly noticed
public hearing on the subject matter of the Application. The
Planning Commission, upon conclusion of the public hearing, took
action to adopt PC Resolution No. 91-20 for certification of the
Final EIR and approval of Conditional Use Permit/Oak Tree
Permit No. 89582 (effective upon approval of the Vesting
Tentative Tract Map Application) and PC Resolution No. 91-23
recommending approval of the Application to this City Council. --
4
(o) The City determined that the Project and those discretionary
actions identified therein or required thereunder constituted a
"project" pursuant to the California Environmental Quality Act, as
amended ("CEQA") and the guidelines for the Implementation of
the California Environmental Quality Act ("guidelines").
(p) The City, based upon the preliminary findings contained in an
Initial Study prepared by the City, determined that the Project
could result in significant environmental impacts, commenced
preparation of an addendum to the Final Environmental Impact
Report
(q) On February 2, 1995, pursuant to the noticing obligations
delineated in CEQA guidelines, the City prepared and disseminated
both a Notice of Completion ("NOC") and the Draft
Environmental Impact Report for the project, SCH No. 90010505
("Draft EIR"), commencing a 30 -day review period which was
extended to and concluded on March 15, 1995.
(r) The City published legal notice regarding the availability of the
Draft EIR and solicited public comments thereupon in the San
Gabriel. Valley Tribune and Inland Valley Bulletin on December 3,
1992.
(s) The City of Diamond Bar City Council conducted noticed public
hearings on the Project and its environmental documentation on
January 7, January 21, January 28, March 3, April 7, April 21,
October 16, and concluded the duly noticed public hearing on
November 17, 1992.
(t) Subsequent to that hearing, the applicant was unable to provide
additional information to the City Council related to geotechnical
information on soil conditions and required stabilizing remedial
procedures. The Council therefore took action to deny the project
without prejudice.
(u) The applicant challenged the denial of the project in court and a
Settlement Agreement was eventually entered into between the
applicant and the City. A component of the Settlement Agreement
required the City to hold a Joint Session public hearing with the
Planning Commission. That public hearing was held on April 6,
1995 and continued April 24 and May 8 before the Planning
Commission.
_ (v) A public hearing before the City Council was scheduled for May
16 and continued to May 17 and, at the request of the applicant,
was continued again until June 6, 1995.
(w) The Final EIR consists of the following documents: (1) Revised
Draft Environmental Impact Report, Volume I (SCH 90010861)
(January, 1995) (2) Revised Draft Environmental Impact Report,
Volume II (SCH 90010861) (January, 1995) (3) Response to
Comments Received on Draft Environmental Impact Report for
Vesting Tentative Tract Map No. 47850, Conditional Use Permit
No. 89528 and Oak Tract No. 89528 (March, 1995); and (4)
Mitigation Monitoring Program for Vesting Tentative Tract Map
No. 47850, Conditional Use Permit No. 89528 and Oak Tract No.
89528 (March, 1995).
8. Based upon substantial evidence presented to this Council during the above
referenced public hearing and upon the specific findings of fact set forth
above, pursuant to the provisions of California Government Code 65361,
the Council hereby finds and determines as follows:
(a) The action proposed (Vesting Tentative Map) was initiated and
processed in accordance with the provisions of California
Government Code 65360 and Ordinance No. 4 (1992) of the City
of Diamond Bar and pursuant to the Extension of Time conditions
granted to the City of Diamond Bar by the Office of Planning and
Research.
(b) The Application as proposed and conditioned herein complies with
all other applicable requirements of State law and local ordinances.
9. Based on the findings and conclusions set forth herein, this City Council
hereby approves the Application subject to the following conditions which
are set forth in Exhibit "C" hereto and are incorporated by reference.
The City Clerk is hereby directed to:
(a) to certify to the adoption of this Resolution; and
(b) forthwith transmit a certified copy of this Resolution, by certified
mail, return receipt requested, to the applicant at its address per
City records.
Approved and adopted this the 6th day of June, 1995, by the City Council of the City
of Diamond Bar.
BYIF :
Mayor
6
I, Lynda Burgess, City Clerk of the City of Diamond Bar, do hereby certify that the
foregoing Resolution was duly introduced, passed, and adopted by the City Council of
the City of Diamond Bar, at a regular meeting of the City Council held on the 6th day
of June, 1995, by the following vote -to -wit:
AYES:
[COUNCIL MEMBERS:]
Ansari, Harmony, MPT/Werner
NOES:
[COUNCIL MEMBERS:]
M/Papen
ABSTAIN:
[COUNCIL MEMBERS:]
None
ABSENT:
[COUNCIL MEMBERS:]
None
ATTES
tyClerk of the Ci of
Diamond Bar
QvETYMSUrsuMnv►vraraas&M
7
FINDINGS AND FACTS IN SUPPORT OF FINDINGS FOR
SIGNIFICANT ENVIRONMENTAL EFFECTS OF VESTING TENTATIVE
MAP 47850 AND STATEMENT OF OVERRIDING CONSIDERATIONS
In accordance with Section 21081 of the California Environmental Quality Act (CEQA) and
Section 15091 of the CEQA Guidelines, the City of Diamond Bar has provided documentation
that addresses potential significant impacts that would result from the implementation of Vesting
Tentative Map (VTM) 47850.
These findings only address environmental issues that would be significantly affected by the
proposed project. The following environmental issues would not be significantly affected by
the implementation of the proposed project; therefore, findings for these issues are not
required.
• Hydrology and Water Quality
• Noise
• Land Use
• Energy Resources
• Aesthetics and Visual Resources
• Archaeological Resources.
Potential significant impacts of VIM 47850 have been separated into two categories: (1) those
potential impacts that could be mitigated to a level that is considered less than significant with
the implementation of the recommended mitigation measures, and (2) those potential impacts
that could be reduced with the implementation of the recommended mitigation measures;
however, the impacts would remain significant (e.g., cannot be reduced to a level less than
significant).
As required by Section 15091(a) of the CEQA Guidelines, one or more of the following
findings must be made for each potential significant impact:
• Changes or alterations have been required or incorporated into the project
which avoid or substantially lessen the significant environmental effects as
identified in the final EIR. (Finding 1)
• Such changes or alterations are within the responsibility and jurisdiction of
another public agency and not the agency making the finding. Such changes
have been adopted by such other or can and should be adopted by such other
agency. (Finding 2)
CAWP5I\RES0LUT1147850.FND 1
• Specific economic, social, or other considerations make infeasible the
mitigation measures or project alternatives identified in the final EIR. (Finding
3) —
Section 15091(b) requires that each finding be supported by substantial evidence in the
administrative record.
The potential significant adverse environmental impacts of VTM 47850 that would be mitigated
are listed below. The Diamond Bar City Council finds that these potential significant adverse
impacts would be mitigated to a level that is considered less than significant after
implementation of the recommended mitigation measures.
NATURAL LAND FORMS
Development of the proposed project would result in substantial cuts and fills during grading
activities. There would not be significantly less remedial grading involved in a subdivision
containing fewer lots, given that:
1) The conservative assumptions concerning shear strength and other parameters
as required by the City's Geotechnical consultants are utilized to determine
factors of safety not less'than 1.5;
2) The City desires that these conservatively derived factors of safety extend well
beyond the lots' buildable pads.
City hereby makes Finding 1.
Implementation of the following mitigation measures will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
C AWP5I\RESGLUTA47850.FND 2
• During and after construction, measures shall be taken to prevent erosion.
These measures shall be listed and included within a developer -prepared
erosion control plan which shall be approved by the City Engineer prior to
commencing grading.
• A security bond shall be posted with the City Engineer prior to commencement
of grading. This bond shall be adequate to assure completion of grading per
the approved plans for which a grading permit is issued.
• An improvement bond shall be posted and a subdivision agreement shall be
executed for the project development.
• Grading and exterior construction activities shall begin no earlier than 7 a.m.
and shall not continue past 5 p.m., Monday through Friday. Grading and
exterior construction activities shall be restricted to 8 a.m. to 1 p.m. on
Saturday. Transportation of equipment to and across the project site shall
occur only within these hours.
• The applicant shall establish a construction staging area on the project site
before beginning preliminary grading. The construction staging area will
provide for the storage of equipment, landscape materials, and building
materials.
• Gopher suppression measures shall be developed by the geotechnical consultant
in order to control gopher tunneling and erosion of fill slopes. The gopher
suppression measures shall be subject to review by the City's geotechnical
consultant and to City Engineer approval prior to issuance of a grading permit.
The onsite colluvium may affect proposed residential structures.
egg: The City hereby makes Finding 1.
.j _t
Implementation of the following mitigation measure will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• Onsite colluvium shall be removed during grading activities. In those cases
where colluvium soils are used as fill, they shall be remolded and compacted
to attain the required relative compaction of 95 percent for the proposed fill
slopes and buttresses. Representative testing of the compacted fill shall occur
during grading in order to verify the design shear strength.
Wig: The City hereby makes Finding I.
Significant Imnact
Existing areas of geologic instability due to creep, landslides, and seismic ground shaking
would affect the proposed development.
Finding:,The City hereby makes Finding 1.
Implementation of the following mitigation measures will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• Major areas of fill shall not exceed a slope of two units horizontal to one unit
vertical (2:1 slope maximum).
• A qualified soils engineer shall confirm in writing that the proposed grading
for Vesting Tentative Map 47850 will render the site safe from known
geologic instabilities, to an acceptable- margin of safety, based upon standard
soils engineering practices.
• All areas of unstable soils shall be modified to correct the instability to a level
of adequate safety based upon soils engineering criteria and standards. All
areas of unstable soils shall be excavated and recompacted per the
recommendations of the soils engineer.
• As additional geologic studies are conducted, the project geotechnical engineer
shall determine the number of additional borings/pits excavated onsite in order
to fiuther define geologic constraints and ensure safe and stable developments.
These actions shall be subject to review by the City Engineer and the City's
geotechnical consultant.
TRAFFIC and CIRCULATION
Implementation of 57 dwelling units will increase traffic volumes in the project vicinity and
may contribute to significant cumulative impacts on the following intersections and roadway
segments: (1) Shadow Canyon/Diamond Bar Boulevard, (2) Diamond Bar/Brea Canyon
Boulevard, (3) Diamond Bar Boulevard north of Pathfinder, (4) Diamond Bar
Boulevard/Pathfinder, (5) Diamond Bar Boulevard across from the Country Hill Shopping
Center. The proposed project will also result in potential onsite traffic impacts.
CAWP51\FM0LU M4M0.FND 4
Fin Z: The City hereby makes Finding I.
Facts in &Mrt of Prodi=
Implementation of the following mitigation measures will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• To improve traffic operations at the Shadow Canyon/Diamond Bar Boulevard
intersection, the City as a part of its long range planning process installed a
traffic signal at this location. The identified need for signalization at the
intersection was caused by traffic volumes on Diamond Bar Boulevard and the
demand for access by vehicles on Shadow Canyon Drive. The construction of
the proposed tract will cumulatively aggravate this impact. The resulting
cumulative impact may be defined as significant. (The applicants have stated
that they are prepared to fund the incremental (pro -rata) share of the cost of
the signallzation of the intersection of Shadow Canyon Drive and Diamond Bar
Boulevard). Prior to the approval of the final map, the applicant shall submit
its pro -rata share to the City of Diamond Bar Public Works Department.
• The project applicant shall provide its fair share contribution toward striping
a separate right -turn lane and installing* appropriate signs in the northbound
direction at the intersection of Diamond Bar and Shadow Carryon Drive.
• Due to forecasted traffic growth in the study area, a separate left -turn lane
should be installed in the southbound direction at the intersection of Diamond
Bar Boulevard and Brea Canyon Road to increase the level of service from
Level of Service "E" to an acceptable level. The need for this additional lane
occurs under the traffic condition of existing plus future background plus
Project traffic. This impact is not significant individually, but could be
defined as significant cumulatively. Prior to the issuance of a building permit,
the applicant shall submit its incremental (pro -rata) share to the City of
Diamond Bar Public Works Department for a separate left -turn lane in the
southbound direction at the intersection of Diamond Bar Boulevard and Brea
Canyon Road.
• The project applicant shall provide its fair share contribution toward striping
a separate right -turn lane and installing appropriate signs in the southbound
direction at the intersection of Diamond Bar Boulevard and Pathfinder Road.
• The project applicant shall provide its fair share contribution toward the
construction of a sidewalk along the eastside of Diamond Bar Boulevard across
from the Country Hills Shopping Center.
• In addition, a stop sign should also be installed at the intersection of Wagon
Train Lane and Steeple Chase Lane in order to minimize any vehicular
conflicts in the intersection. The stop sign should be installed on Wagon Train
c:\wP51\RF.S0LUTI\47850.FND 5
Lane (stem of the intersection) along with fifty feet of double yellow striping
and Type D raised pavement markers, stop legend and limit line.
• Parking for construction employees and equipment will be provided on the
construction site, and no parking will be permitted on existing streets.
• No fencing, planting materials, or obstructions of any kind (over 30 inches
high, as measured from the top of the curb), shall be allowed in the clear sight
triangles (50'x50') at the intersections of the main access roads which serve
the project site.
BIOLOGICAL
Implementation of the proposed project would eliminate 28.2 acres of California walnut
woodland due to grading and affect 5.0 acres of California walnut woodland due to fuel
modification. Sensitive wildlife associated with this habitat would also be affected.
mpg: The City hereby makes Finding 1.
Implementation of the following mitigation measures will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• A walnut woodland revegetation program shall be approved by the City of
Diamond Bar prior to the issuance of grading permits. The program shall
include walnut woodland replacement guidelines that address mitigation site
selection, site preparation, irrigation system design, planting (planting sizes
and densities by species), and maintenance (weed control, irrigation
requirements,. and plant replacement). Monitoring guidelines shall be
established that will include performance standards (percent survival and
percent cover standards for planted species), monitoring methodology, and
reporting requirements. To ensure the replacement of ecosystem values and
not just of trees, native understory plant species shall be included in the walnut
woodlandrevegetation program. Understory plant species shall be grown and
obtained from native plant suppliers. Walnuts planted in the fuel modification
areas shall follow the guidelines.
• Replacement walnuts shall be planted within protected open space areas onsite —
in need of habitat enhancement and where long-term wildlife values can be
realized. If this criteria cannot be met onsite, replacement of walnuts removed
CAWP511RES0LU71147850.PND' 6
by project implementation shall be performed offsite at locations agreed upon
by the CDFG and the City of Diamond Bar. An offsite location shall be
designated prior to the issuance of a grading permit for VTM 47850.
• All walnuts removed during project implementation shall be replaced at a ratio
of 2:1, with a minimum container size of 5 gallons. Planting shall occur
between November and April. Walnut replacement shall not exceed 45
replacement trees per acre (with understory) or 30 trees per acre (without
understory). The project proponent shall avoid and preserve walnut trees to
the maximum extent possible within the grading plan.
• Walnut woodland revegetation areas shall be maintained (weed control and
supplemental irrigation) by the subdivider for a minimum of 3 years following
planting to ensure the successful establishment and long-term survival of the
habitat. Irrigation shall be gradually curtailed by the end of the third year to
ensure that the woodland plantings can survive without long-term supplemental
irrigation.
• All walnut woodland replacement efforts shall be monitored by the subdivider
for a period of 5 years. Yearly monitoring reports shall be submitted to the
City of Diamond Bar. These monitoring reports shall document the success
of the replacement efforts (percent survival of replacement plantings, percent
cover, and height data) and any required remedial actions. At the end of the
5 year monitoring period, the performance standard shall be two live
replacement walnut trees for each walnut tree removed. -
Grading activities associated with the project would affect 0.6' acres of coast live oak woodland
and fuel modification would affect 0.7 acres. Sensitive wildlife associated with this habitat
would also be affected.
mpg: The City hereby makes Finding 1.
Implementation of the following mitigation measures will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• The feasibility of relocating small- to moderate-sized oaks, not currently
proposed for relocation, shall be analyzed for use in the oak replacement
-- efforts. Consideration shall be given to collecting oak acorns onsite for
germination and use in the oak woodland mitigation efforts. An oak woodland
CAWP5I\RESOLUT1447850.FND 7
revegetation plan shall be approved by the City of Diamond Bar prior to the
issuance of a grading permit. The plan shall include a program to reduce the
amount of surface runoff reaching oak woodlands. Surface runoff from
impermeable surfaces, irrigation systems, and construction areas shall be
directed away from oak woodlands by means of a swale, French drain, or
similar device. All oaks within the upland habitat removed as a result of
project implementation shall be replaced at a ratio of 4:1. To ensure the
replacement of ecosystem values and not just of trees, native understory plant
species shall be included in the oak woodland replacement program. Oak
replacement shall include 64 replacement oaks in upland habitat. Oak
replacement shall not exceed 45 replacement trees per acre. All oak woodland
replacement container stock shall be inoculated with mycorrhyzal fungi to
enhance plant establishment. Replacement oak trees shall consist of the
following mix of sizes:
- 5 percent - 5 gallon
- 25 percent - 15 gallon
- 50 percent - 24 -inch box
- 20 percent - 36 -inch box
• The replacement requirements for riparian -associated oaks to be removed by
project implementation shall be determined through discussions with the
California Department of Fish and Game as part of the Section 1600 process.
The riparian -associated oaks removed as a result of project implementation
shall be replaced at a ratio of a minimum of 3:1. Oak replacement shall ---
include 21 replacement oaks in riparian habitat.
• Replacement oaks shall be planted within protected open space areas in need
of habitat enhancement and where long-term wildlife values can be realized.
If this criterion cannot be met onsite, replacement of oaks removed as a result
of project implementation shall be performed offsite. An offsite location shall
be designated prior to the issuance of a grading permit for VTM 47850.
• Oak woodland revegetation areas shall be maintained (weed control and
supplemental irrigation) by the subdivider for a minimum of 3 years following
planting to ensure the successful establishment and long-term survival of the
habitat. Irrigation will be gradually curtailed by the end of the third year to
ensure that the woodland plantings can survive without supplemental irrigation.
• All oak woodland replacement efforts shall be monitored by the subdivider for
a period of 5 years. Yearly monitoring reports shall be submitted to the City
of Diamond Bar. These monitoring reports shall document the success of the
replacement efforts (percent survival of replacement plantings, percent cover,
and height data) and any required remedial actions. At the end of the 5 -year
monitoring period, the performance standard shall be two live replacement oak
trees for each oak remediation.
C: \WP5I\RESOLUTI\47650.FND
Development of the proposed project would affect the existing riparian habitat and associated
sensitive wildlife on the project site.
Finffing: The City hereby makes Finding 1.
Implementation of the following mitigation measures will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• Prior to the issuance of a grading permit, a mitigation plan addressing potential
impacts on streambed, wetlands, or riparian habitats shall be prepared by the
subdivider in conjunction with an application for a Section 404 permit from the
U.S. Army Corps of Engineers (ACOE) and a Section 1603 Agreement with
the California Department of Fish and Game. These agencies typically require
the replacement of lost habitat values through the enhancement of remaining
streambed, wetland, or riparian habitat, or through the creation of new areas
of such habitat. The mitigation plan for riparian habitats shall outline
procedures for mitigation site preparation (clearing, grading,_ topsoil storage),
irrigation, planting (seeding, container plantings, transplantation), and
maintenance (weed control, irrigation scheduling, replanting). Hydrological
studies shall be performed to determine if groundwater levels and surface
water flows will be adequate to sustain the restored riparian habitat once
established. Methodologies and requirements shall be specified in the
mitigation plan for monitoring of the riparian habitat replacement efforts,
including performance criteria and provisions favi documenting the results of
the replacement efforts through the end of the monitoring periods. Provisions
to insure the long-term preservation of riparian mitigation areas shall be
identified. Riparian habitat replacement programs shall be submitted to the
U.S. Fish and Wildlife Service (as biological advisor to the ACOE) and the
CDFG for review and approval.
• Riparian mitigation implementation shall be completed as soon as practicable
following completion of project grading.
• Riparian mitigation shall be monitored by the subdivider for a 5 -year period
following planting. The subdivider shall submit annual reports discussing the
survival rate of the mitigation to the City of Diamond Bar.
C AWPS 11RESOLUT1\478SOYND
Construction activities on the project site will affect onsite and offsite natural habitats.
EkLdiU: The City hereby makes Finding 1.
Implementation of the following mitigation measures will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• Prior to the issuance of a grading permit, the limits of proposed grading and
construction activities shall be delineated with Moot lengths of PVC pipe,
mounted on a rigid steel base for support.
• Prior to the initiation of vegetation clearing or grading, all oaks and walnuts
within 200 feet of construction activity shall be marked for either protection,
relocation, or removal, both in the field and on construction site plans. Oaks
and walnuts to be retained shall be protected from construction damage
through the installation of temporary, rigid fencing. Fencing shall be a
minimum of 4 feet high and located at least 15 feet outside the dripline of any _
oak or walnut or group of oaks/walnuts. No equipment storage or other
activities shall be allowed within these fenced areas. Fencing shall remain in
place for the duration of construction activities.
• - A biological resource monitor, approved by the City of Diamond Sar, shall be
onsite during construction to ensure adherence to all habitat protection
measures.
• In compliance with Section 3503.5 of the California Fish and Game Code, a
qualified biologist shall determine the presence of any raptor nests prior to or
concurrent with grading activities, the project applicant shall contact CDFG,
shall obtain and comply with all appropriate procedures relative to grading
operations in proximity to those nests, and shall provide verification of same
to the City. Resulting mitigation measures may include restricting construction
activities near raptor nesting sites during and immediately following the
breeding season.
• Pre -construction meetings shall be held between the biological resource
monitor and construction supervisors and equipment operators to review and
ensure adherence to all habitat protection measures.
• During construction, measures to prevent erosion, such as use of silt fencing _
or hay bales, shall be installed at the limits of grading.
CAWP51\RESOLU71147850YND 10
• During construction, vehicle haul routes between cut and fill locations shall be
restricted to a minimum number. Earth -moving equipment shall be confined
to the narrowest possible corridor during construction. Waste dirt or rubble
shall not be deposited on adjacent native vegetation. Vehicle haul routes shall
be identified on construction plans and marked in the field, in consultation with
a qualified biologist, to ensure minimization of impacts to biological resources.
Trenching for utilities and irrigation lines shall be conducted outside the
dripline of individual oaks or oak woodlands.
The proposed project includes the implementation of a fuel modification zone that will affect
14.4 acres of natural habitat and associated sensitive wildlife.
EbU ft: The City hereby makes Finding 1.
Implementation of the following mitigation measures will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• All fuel modification requirements, such as selective clearing, pruning, and
wet zones, shall be prohibited within 15 feet of the dripline of any individual
oak tree or within 50 feet of the dripline of any oak woodland, except as
otherwise required by the fire marshall.
• All large native shrub specimens (5 -inch caliper or 1'irger at base), within fuel
modification zones shall remain in place, except as otherwise directed by the
fire marshall. Large native shrubs within the fuel modification zone may be
thinned and pruned of all deadwood to reduce the fuel load. Only highly
flammable vegetation, such as chamise, sages, and non-native grasses should
be selectively removed, as required by the fire marshall.
• All thinning or selective clearing of vegetation within the fuel modification
zone should be completed by hand to prevent the disturbance of the soil
structure or vegetation to be preserved. No herbicides shall be used.
Thinning should be done in a manner to maintain a natural appearance.
• The irrigated wet zone should serve as both a fuel modification zone and as a
buffer zone/transition area between the residences and the open space area, and
should be designed to limit human intrusion.
• Prior to the issuance of grading permits, an urban runoff management plan
prepared by a qualified biologist, shall be developed to control and reduce the
amount of surface runoff generated by local precipitation events, as well as
Onsite and offsite plant and wildlife species will experience post -construction impacts.
Finding: The City hereby makes Finding 1.
Facts in Sup" of F in fta
Implementation of the following mitigation measures will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• The following list of plant species shall not be permitted in the landscape plan
in any development areas (i.e., common areas and private lots). These plants
may potentially invade natural areas and displace native plant species. Such
non-native species include ice plant (Delosperrna spp.), blue gum (Eucalyptus
globulus), spotted gum (Eucalyptus maculata), tree -of -heaven (Ailanthus
altissima), Brazilian pepper tree (Schinus terebinthifolius), Peruvian pepper
tree (S. nolle), pampas grass (Cortaderia sellowlana), fountain grass
(Pemdsetum setaceum), Spanish broom (Spanium junceum), German ivy
(Senecio mikaniodes), 'periwinkle (Vinca major), tamarisk (Tamarix sp.),
hottentot fig (Carpobrotus edulis), Jupiter's beard (Centranthus ruber), Melia
sp., cape honeysuckle (Teconaria capensis), and plumbago (Plumbago
auricolata).
• Landscaping within common areas and buffer zones shall be restricted to the
use of native plants. These should include only those species that were found
to occur on the site or in the immediate vicinity prior to grading. Such native
species, include laurel sumac (Malosma laurina), lemonadeberry (Rhus
imegrifolia), California sagebrush (Artemisia californica), Mexican elderberry
(Sambucus mexicana), coast live oak (Quercus agrifolia), scrub oak (Quercus
dunosa), California black walnut (luglans califibmica), white sage (Silva
apiana), purple sage (Salvia leucophylla), black sage (Salvia mellifera), toyon
(Heteromeles arbutifolia), fuschia-flowered gooseberry (Ribes speciosum),
western poison oak (Toxicodendron diversilobum), coyote brush (Baccharis
pilularis), mulefat (Baccharis salicifolia), thistle (Cirsium sp.), California
everlasting (Gnaphalium californicum), saw-toothed goldenbush (Hazardia
squarrosa), telegraph weed (Heterotheca grandif lora), coastal goldenbush
(Isocoma menziesii var. menziesii), California dodder Cuscuta califomica),
rattlesnake weed (Chamaesyce albomaMinata), Santa Barbara locoweed
(Astragalus trichopodus), deerweed (Lotus scoparius), lupine (Lupines sp.),
purple sage -black sage hybrid (Salvia leucophylla x Salvia mellifera), mesa
bushmallow (Malacothanvuus fasciculatus), holly -leaved redberry (Rhamnus
ilicifolia), chamise (Adenostoma fasciculatum), narrow -leaved bedstraw
(Galium angustifolium), arroyo willow (Salix kuiolepis), orange bush monkey -
flower (Mimulus aurantiacus), chaparral nightshade (Solanum xantc), western
verbena (Verbena lasiostachys), big leaf mistletoe (Phoradendron
macrophyllum), giant wild rye (Leymus condensatus), and purple needlegrass —"
(Nassella pulchra). Landscaping on private lots may use non-native plants.
CAWP51\RESOLUT1147850.FND 12
• Prior to the issuance of grading permits, an urban runoff management plan
prepared by a qualified biologist, shall be developed to control and reduce the
_ amount of surface runoff generated by local precipitation events, as well as
nuisance flows, and the associated pollutants that may be transported along
with stormwaters into natural drainages. The conditions of the plan will be
subject to approval by the City Engineer prior to issuance of a grading permit.
• Prior to the issuance of building permits, a Buyer Awareness brochure shall
be developed to provide residents with information on surrounding natural
habitats and resident wildlife, as well as guidelines to ensure the continuation
of wildlife values of surrounding habitats. Guidelines to be incorporated into
this brochure include domestic pet control, landscaping around mature oaks,
native landscaping, and appropriate behavior in natural open space areas.
• Successful integration of development into wildlife habitat depends on proper
buffering at the interface of these two areas. Development often results in an
edge condition where residential lots are located adjacent to areas of natural
open space. A conceptual buffer plan using native plant species has been
developed for the management of this edge condition. This buffer will limit
potential impacts to the natural areas by screening development from wildlife,
capturing excess runoff from landscape irrigation that could potentially injure
sensitive plants, and providing an edge along residential lots that is
aesthetically pleasing while providing many plant species that are valuable to
wildlife. This edge, shall be designed so that it may be integrated into a fuel
modification plan for the development that meets the requirements of the Los
Angeles County Fire Department.
Native- plants recommended for this buffer include mesic species such as
toyon, California black walnut, and Mexican elderberry.
Additional native plant species that are low growing and of low fuel volume,
and would not impede ' views into natural areas, could also be used. These
include golden yarrow (Eriophyllum con Um California POPPY
(Eschscholda califomica), monkey flower (Diplacus spp.), heart -leaved
penstemon (Keckiella cordifolia), California fuchsia (Epilobium spp.),
deerweed (Lotus scoparius), and annual lupine (Lupinus spp.). This zone shall
be periodically thinned to maintain low fuel levels, and should be cleared of
invasive grasses.
To help all plants mature as quickly as possible and maintain all plant
materials in optimum condition, irrigation facilities shall be installed as
appropriate on slope areas and maintained by the applicant until sold. Mainte-
nance shall then be the responsibility of the property owner.
The use of fertilizers and pesticides within transition zones shall be minimized.
Only nonresidual herbicides shall be used to control persistent invasive species
within the landscape buffers. Mechanical clearing techniques such as grubbing
C:\WP51\RES0LUTI147850.FND 13
and mowing, and hand removal shall be used to eliminate less persistent
invasive species.
Subject to approval by the City of Diamond Bar, the applicant shall provide
for the following:
a. Physical specification on the type and degree of fencing allowed.
b. Enforcement of a mandatory leash law.
C. Guidelines for the maintenance of trash receptacles and uneaten pet food.
d. Prohibition of the outside storage of pet food.
e. The urban pollution basins shall be maintained by the subdivider. The
City of Diamond Bar shall reserve the right to maintain the urban
pollution basins and collect its costs should efforts by the subdivider not
meet City standards.
f. Existing dirt roads within the open space area shall be used as
pedestrian/hiking/equestrian/biking trails as much as possible. Any
additional trails shall be designed to avoid sensitive biological resources.
Hunting shall not be allowed within the open space areas.
Unauthorized vehicular use shall be restricted within the open space areas.
All trash (man-made materials) shall be removed from natural open space areas
on a regular basis.
Invasive weedy species such as giant reed, fennel, and artichoke thistle shall
be monitored by the subdivider and, if necessary, these invasive plant species
shall be removed.
• Signs shall be located in appropriate areas to discourage human intrusion into
natural open space and the Tonner Canyon SEA No.15.
0 The effect of night lighting on wildlife shall be mitigated through the use of
low -intensity street lamps at the edge of development, low -height lighting
poles, and shielding by internal silvering of the globe or external opaque
reflectors.
CAWP51\RES0LUTI\47850.FND 14
7��
PUBLIC SERVICES - SCHOOLS
Significant Imad
The proposed project would increase the number of students in the Walnut Valley Unified
School District.
Finding: The City hereby makes Finding 1.
Implementation of the following mitigation measure will lessen or avoid project impacts;
thereafter, potential effects will be reduced to a level that is considered less than significant:
• Prior to issuance of a building permit, the project applicant shall pay a
development fee to the Walnut Valley Unified School District (WVUSD) in
accordance with California Government Code 53080 and the school fees
identified by the WVUSD.
The potential significant unavoidable adverse impacts associated with the implementation of
VTM 47850 are listed below. The Diamond Bar City Council finds that these potential
significant adverse impacts would be reduced with the implementation of the recommended
mitigation measures; however, the impacts cannot be reduced to a level that is less than
significant. The Diamond Bar City Council will adopt a, Statement of Overriding
Considerations per Section 15093 of the CEQA Guidelines.
CLIMATE and AIR QUALITY
The proposed project will generate a maximum of approximately 891 pounds per day (lbs/day)
of PM10 during construction activities which exceeds the South Coast Air Quality Management
District's threshold of 150 lbs/day of PM10.
C:\wP51\RES0LUT1\47850.FND 15
Fin in : The City hereby makes Finding 1.
Facts in SuRM of Fin i=
Implementation of the following mitigation measures will lessen the project impact; however,
the impact would remain significant:
• Prior to the issuance of a grading permit, the project applicant shall
demonstrate to the satisfaction of the City Engineer how the following
measures recommended by the City or the South Coast Air Quality
Management District have either • been incorporated into the project
construction guidelines or provided sufficient evidence to the City that a
particular measure is not feasible to implement.
a. Apply approved chemical soil stabilizers according to manufacturers'
specifications to all inactive construction areas (previously graded areas
inactive for 4 days or more).
b. Replace ground cover in disturbed areas per City specifications.
C. Enclose, cover, water twice daily, or apply approved soil binders,
according to manufacturers' specifications, to exposed stockpiles (i.e.,
gravel, sand, dirt).
d. - Water active sites at least twice daily.
e. Suspend all excavating and grading operations when wind speeds (as
instantaneous gusts) exceed 25 miles per hour (mph)..
f. Monitor for particulate emissions according to South Coast Air Quality
Management District specified procedures: • for information call (909)
396-3147.
g. In field trailers, use portable air conditioning units powered by nondiesel
equipment.
h. Sweep streets at the end of day if any visible soil material is carried over
to adjacent thoroughfares (recommend water sweepers which use
reclaimed water).
i. The City may require that gravel be used in unpaved areas used as either
construction roads or staging areas for construction equipment.
Apply water twice daily for chemical soil stabilizers according to —'
manufacturers' specifications to all unpaved parking or staging areas and
unpaved road surfaces, if required for dust control.
C AWP51 \RESOLUTI\47850.PND 16
k. Install wheel washers where vehicles exit unpaved roads onto paved
roads, or wash off trucks and any equipment leaving the site every trip
in designated areas on the site.
1. Traffic speeds on all unpaved roads surfaces to be reduced to 15 mph or
less.
m. All trucks hauling dirt, sand, soil, or other loose materials are to be
covered and should maintain at least 6 inches of freeboard (i.e.,
minimum required space between top of the load and top of the trailer,
based upon a level load).
n. Pave construction roads that have a traffic volume of more than 50 daily
trips by construction equipment, 150 total daily trips for all vehicles, for
12 consecutive days.
o. Pave all construction access roads at least 100 feet onto the site from the
main road.
p. Use methanol or low -sulfur pile drivers.
q. Use low -sulfur fuel for stationary construction equipment pursuant to
Rule 431.2
r. Suspend use of all construction equipment operations during second stage
smog alerts. For daily forecast, call (800) 242-4022 (Los Angeles
County).
S. Use construction equipment that has catalytic convertors (for gasoline
powered equipment).
t. - Prevent trucks from idling longer than 2 minutes.
U. Configure construction parking to minimize traffic interference.
V. Provide temporary traffic control during all phases of construction
activities to improve traffic flow such as providing a flag person to
direct traffic and ensure safe movements off the site as directed by the
City Engineer.
W. Schedule construction activities that affect traffic flow to off-peak hours
(i.e., between 7 p.m. and 6 a.m, and between 10 .a.m. and 3 p.m.) with
approval from the City.
Implementation of the above measures can reduce PM10 emissions by up to 75 percent. The
-- amount of PM10 that would be generated by the construction of the proposed project (i.e., 891
lbs/day) could be reduced by a maximum of 75 percent to 223 lbs/day which would still exceed
C:\WP51\MOLUTR47850.FND 17
SCAQMD's threshold of 150 lbs/day of PM10. The remaining unavoidable adverse impact is
considered to be acceptable in light of the evidence provided above and the Statement of
Overriding Considerations provided herein as Attachment A.
Significant Imyact
The proposed project will increase emissions of oxides of nitrogen (NOx) and reactive organic
gases (ROG) in the air basin. Although the project's emissions of NOx and ROG would not
be significant, these emissions, when combined with related projects, would be cumulatively
significant.
EWdi=: The City hereby makes Finding 1 and Finding I
Implementation of the following mitigation measures will lessen the project impact; however,
the impact would remain significant:
• Prior to the issuance of a building permit, the project applicant shall
demonstrate to the satisfaction of the City Engineer how the following
measures recommended by -the South Coast Air Quality Management District
have been incorporated into the project.
a. Use solar or low -emission water heaters.
b. Use central water heating systems.
C. Use built-in energy-efficient appliances.
d. Provide shade trees to reduce building heat.
e. Use energy-efficient and automated controls for air conditioners.
f. Use double -glass paned windows.
Implementation of the above measures will serve to substantially, but not completely, mitigate
the project's contribution to a potential significant impact on long-term air quality. The
remaining unavoidable adverse impact is considered to be acceptable in light of the evidence
provided above and the Statement of Overriding Considerations provided herein as Attachment
A.
CAWP51\RES0LU17\47850.FND 18
ATTACHMENT A
OVERRIDING CONSIDERATIONS FOR
VESTING TENTATIVE MAP 47850
As stated in the preceding findings, the City of Diamond Bar has determined that even with the
adoption of mitigation measures, certain impacts of the project will continue to be, or will
potentially be, significant, including short- and long-term impacts described under air quality.
As provided by Section 15093 of the CEQA Guidelines, the City of Diamond Bar has
considered these significant unavoidable adverse impacts in balance with the benefits of the
project, and finds that the benefits of the project, summarized below, render the significant
unavoidable environmental impacts acceptable:
1. Implementation of the proposed project will implement the City of Diamond
Bar's current draft General Plan.
2. Financial contribution for circulation improvements in the project vicinity will
be provided by the proposed project.
3. Development of the proposed project will increase the City's revenue through
property taxes.
4. The corrective design for remedial grading purposes on the landslide areas will
mandate shear strength values at a factor of safety of not less than 1.5.
Q\WP51\RES0LU1I\47850.FND 19
- _ t �l 5 �.t'� � C' i .+ };' � tr � r � z ` fy�'! € 3, -raFt"•.,� r � r � s: 1 e �;. -
.- i ' .� x �, . r jP ,ff s. r ,�'tt t`':- = Z� f` yr , F� � �•Ys. � }.j f � { 1`� .s : i^
y..
.t � .r.., t : ,� r � � 5, i -"� •�1 f �t r.- � r . rX 3�i q r. LY1� ,�..�� 3 � a v'.
1i y� r !� � P s�:i•� r � � 'yrs 7 w s r r r � i\, r F y Y � ' �t f +.t r � t 1 �fiK �.s' �'' � ? .flf ' r � y
1'repar
�R.` aN' 1 'F- .►rr ''J �� Y�7 J A " 9 � a 5 i M -i..-k_i- t dIT `� r�.E^✓ -+-,+: {�.t a'.,lF �` �- s' r;,+�: � Y
r14iT�y #cam
Cltol rl]hlGainOnd�Dar�`
°' .{ji }^�1.• ti` i 4 `� r L Rr y� 4/rk< 3. S � � �-:. � ..�� 1 ,.,,,,r � i�.�} t s� ^ F
•;
Co
mmdn
ity Development Department ',cj`E x fi �a f +`Y F
+t i
a f • . �_ x� �; s°�-2160 Co lei► Diive; SaZte�90,
P
'Diac onci Bar,PYaltforma x,1763-4177
COntaCt:. JaI11e3 De$tefano "Planning Direm
�„+ A a / '..�" > s L ' ! \-�'-, rg� \� �� FF ate, lyr -,.'S �. '�"Z' ,fy;, r�T _ z �+ •{. t r .
1 1'f
r'hr'. :.
47,
�SltF.ti,.,- L' t!F` - w"% "�. t -\• .:��. r1� r '1 h: z. �,,.� r [
•••�; � :+� �� � rr ._'� � +� i � ,..fir r S, n _, � i P ^F �5..' `� .f r .�� >�-�✓l�f� -.ti l: Y�t' i •- r-'..
.• { i l � - ��� y'� Y •` s}1l.. � '� � � /. � y:�+li� � 1 � tz} � ..✓ \: f t�" 'jam � � r � �, �..c :L f -
,y�� %cl,fs`7r`{..t /' ' ` l �..•�'� }•,1 }..;r�F:k}*:��'-,� ,iii �'
`T :� I „y:,% � � Y '` , • j � �' hL `� � ,_. � t �� � y � < - 'z> ._ 5 � ; f °� � • G Z + :. - �, �- '- y 1
...Preparedby:
T Michael Brardman A�s9ciates, > _ c
17310 Red` Hill" Aw nue,`Suite 250
.Irvine; California ? 92714
1(714250-555
"I :Contact,:"Thomas E c Smith, Jr a aICP, ProJect.D�rectorc-4
- z r Michel E: Houlihan,'Prbject Manager `
_11 _
: Y
h March 1995
. 11' t 1 Y� �� ..�� �, --1 /1<G ., •' �, i•'\h\tom .,4� � ` \ � }I tt'' ' Y ;
MITIGATION MONITORING PROGRAM,
VESTING FOR TENTATIVE MAP 47850
r► x'
Mitigation Measures Timing Responsible Party Verification
NATURAL LAND FORMS f
1. Major areas of fill shall not exceed a slope During grading activities. Department of Public Works Field check.
of two units horizontal to one unit vertical
(2:1 slope maximum).
2. During and after construction, measures
shall be taken to prevent erosion. These
measures shall be listed and included within
a developer -prepared erosion control plan
which shall be approved by the City
Engineer prior to commencing grading.
Prior to issuance of a grading Department of Public Works. Review erosion control plan
permit. and field check.
3. A security bond shall be posted with the Prior to issuance of a grading Department of Public Works Receipt of bond.
City Engineer prior to commencement of permit.
grading. This bond shall be adequate to
assure completion of grading per the
approved plans for which a grading permit
is issued.
4. An improvement bond shall be posted and
a subdivision agreement shall be executed
for the project development.
5. A qualified soils engineer shall confirm in
writing that the proposed grading for
Vesting Tentative Map 47850 will render
the site safe from known geologic
instabilities, to an acceptable margin of
safety, based upon standard soils
engineering practice.
18 09030018 AIAIP
Prior to issuance of a grading
permit.
Prior to issuance of a grading
permit.
Department of Public Works
Department of Public Works
Receipt of bond.
Review reports.
Mitigation Monitoring Program
Vesting Tentative Map 47850
Miti ation Measures Timing Responsible Party Verification
6. Grading and exterior construction activities During g r a d i n g and Department of Public Works Field check.
shall begin no earlier than 7 a.m. and shall construction activities.
not continue past 5 p.m., Monday through
Friday. Grading and exterior construction
activities shall be restricted to 8 a.m. to 1
p.m. on Saturday. Transportation of
equipment to and across the project site
shall occur only within these hours.
7. The applicant shall establish a construction Prior to commencement of Department of Public Works Plan check and field review.
staging area on the project site before grading activities.
beginning preliminary grading. The
construction staging area will provide for
the storage of equipment, landscape
materials, and building materials.
8. Onsite colluvium shall be removed during During grading activities. Department of Public Works Field check.
grading activities. In those cases where
colluvium soils are used as fill, they shall
be remolded and compacted to attain the
required relative compaction of 95 percent
for the proposed fill slopes and buttress.
Representative testing of the compacted fill
shall occur during grading in order to
verify the design shear strength.
9. Gopher suppression measures shall be Prior to issuance of a grading Department of Public Works Review reports and field
developed by the geotechnical consultant in permit. check.
order to control gopher tunneling and
erosion of fill slopes. The gopher
suppression measures shall be subject to
review by the City's geotechnical consultant
JBi090I0018 AIMP 2 Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Party Verification
and to City Engineer approval prior to
issuance of a grading permit.
10. All areas of unstable soils shall be modified
to correct the instability to a level of
adequate safety based upon soils
engineering criteria and standards. All
areas of unstable soils shall be excavated
and recompacted per the recommendations
of the soil engineer.
It. As additional geotechnical studies are
conducted, the project geotechnical engineer
shall determine the number of additional
borings/pits excavated onsite in order to
further define geologic constraints and
ensure safe and stable developments. These
actions shall be subject to review by the
City Engineer and the City's geotechnical
consultant.
HYDROLOGY and WATER QUALITY
During grading activities.
Prior to issuance of a grading
permit and during grading.
Department of Public Works
Department of Public Works
Field check.
Plan check and review
reports.
I. To aid in onsite water recharge and Prior to issuance of a grading Department of Public Works Plan check and review
minimize undue channelization of drainage, permit and during grading. reports.
minor tributaries shall be retained,
reconstructed, or created to enhance
percolation rather than run-off.
2. During grading and construction activities, During grading and Department of Public Works Plan check, review reports,
the proposed reconstruction of disturbed construction activities. and field check.
areas will be initiated as quickly as is
feasible to prevent undue erosion and lessen
Je/09030018.Mh-IP 3 Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Party Verification
any non -point pollution impacts to surface
run-off.
3. Prior to issuance of a grading permit, an
urban runoff management plan shall be
prepared by a qualified hydrologist to
control and reduce the amount of surface
runoff generated by local precipitation
events, including nuisance flows and the
associated pollutants which may be
transported along with storm waters into
natural drainages. The plan shall be
reviewed by a qualified biologist to ensure
compatibility with biological resources.
The conditions of the plan will be subject to
approval by the City Engineer prior to
issuance of a grading permit.
4. The applicant shall ensure that a
landscaping installation crew shall begin
work within 7 working days after
completion of final grading. The applicant
shall ensure that all irrigation lines are
properly installed and functional within 60
days after completion of final grading.
This will occur following the final grading
phase of each tract.
Prior to issuance of a grading
permit.
Seven days after completion of
final grading and 60 days after
completion of final grading.
�.
Department of Public Works
Applicant and Department of
Public Works
Plan check and review urban
runoff management plan.
Field check.
5. The applicant shall ensure that all erosion During grading a n d Applicant and Department of Field check.
control devices and measures are properly construction activities. Public Works
installed in a timely manner. This will
occur before, during, and following all
grading phases of each project.
m09030018.1%IMP 4 Mitigation Monitoring Program
Vesting Tentative Map 47850
�...• ,war v.w- �� ...r+ slow OOM+ `--� NNW^ moi+ 101r" IWP
.at A -m ® WIlr
Mitigation Measures
Timing Responsible Party Verification
NOISE
1. All construction equipment shall be
During grading and Department of Public Works Field check.
properly muffled to reduce noise levels.
construction activities.
2. Transportation of equipment and materials
During grading. and Department of Public Works Field check.
and operation of heavy equipment shall be
construction activities.
limited to the hours of 7 a.m. to 5 p.m. on
weekdays and 8 a.m, to 1 p.m. on
Saturdays.
CLIMiATE AND AIR QUALITY
I . Prior to the issuance of a grading permit,
Prior to issuance of a grading Department of Community Plan check.
the project applicant shall demonstrate to
permit. Development
the satisfaction of the City Engineer how
the following measures recommended by
the City or the South Coast Air Quality
Management District have either been
incorporated into the project construction
guidelines or provided sufficient evidence to
the City that a particular measure is not
feasible to implement.
a. Apply approved chemical soil stabiliz-
ers according to manufacturers' speci-
fications to all inactive construction
areas (previously graded areas inactive
for 4 days or more).
b. Replace ground cover in disturbed areas
per City specifications.
1a/09030019.Mn1P 5 Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Party Verification
c. Enclose, cover, water twice daily, or
apply approved soil binders, according
to manufacturers' specifications, to
exposed stockpiles (i.e., gravel, sand,
din).
d. Water active sites at least twice daily.
e. Suspend all excavating and grading
operations when wind speeds (as
instantaneous gusts) exceed 25 miles
per hour (mph).
f. Monitor for particulate emissions
according to South Coast Air Quality
Management District specified proce-
dures: for information call (909) 396- -
3147.
g. In field trailers, use portable air
conditioning units powered by nondiesel
equipment.
h. Sweep streets at the end of day if any
visible soil material is carried over to
adjacent thoroughfares (recommend
water sweepers which use reclaimed
water).
i. The City may require that gravel be
used in unpaved areas used as either
conyruction roads or staging areas for
construction equipment.
1B/09030018 n1KIP
9
Mitigation Monitoring Program
Vesting Tentative Map 47850
■ � � � ■ � � il��—�i� . i �r +iii► ill+ fir, �l �c�
Mitigation Measures Timing Responsible Party Verification
j. Apply water twice daily for chemical
soil stabilizers according to
manufacturers' specifications to all
unpaved parking or staging areas and
unpaved road surfaces, if required for
dust control.
k. Install wheel washers where vehicles
exit unpaved roads onto paved roads, or
wash off trucks and any equipment
leaving the site every trip in designated
areas on the site.
1. Traffic speeds on all unpaved roads
surfaces to be reduced -to 15 mph or
less.
in. All trucks hauling dirt, sand, soil, or
other loose materials are to be covered
and should maintain at least 6 inches of
freeboard (i.e., minimum required
space between top of the load and top
of the trailer, based upon a level load.
n. Pave construction roads that have a
traffic volume of more than 50 daily
trips by construction equipment, 150
total daily trips for all vehicles, for 12
consecutive days.
o. Pave all construction access roads at
least 100 feet onto the site from the
main road.
1B OW30O19 PIMP
7
Mitigation Monitoring Program
Vesting Tentative Map 47850
1
I
Mitigation Measures' Timing Responsible Parry Verification
p. Use methanol or low -sulfur pile drivers.
q. Use low -sulfur fuel for stationary
construction equipment pursuant to Rule
431.2
r. Suspend use of all construction
equipment operations during second
stage smog alerts. For daily forecast,
call (800) 242-4022 (Los Angeles
County).
s. Use construction equipment that has
catalytic converters (for gasoline
powered equipment).
t. Prevent trucks from idling longer than
2 minutes.
u. Configure construction parking to
minimize traffic interference.
v. Provide temporary traffic control during
all phases of construction activities to
improve traffic flow such as providing
a flag person to direct traffic and ensure
safe movements off the site as directed
by the City Engineer.
w. Schedule construction activities that
affect traffic flow to off-peak hours
(i.e., between 10 a.m. and 3 p.m.) with
approval from the City.
rB/09030018.MMP 8 Mitigation Monitoring Program
Vesting Tentative Map 47850
.��.. R� ...wr 08&�' RSA •w= 4"f m r� won= Oft.w 002"W rwW% ww_. A00111- www.
Mitigation Measures Timing Responsible Party Verification
2. Prior to the issuance of a building permit, Prior to issuance of a building Department of Community Plan check.
the project applicant shall demonstrate to permit. Development
the satisfaction of the City Engineer how
the following measures recommended by
the South Coast Air Quality Management
District have been incorporated into the
project.
a. Use of solar or low -emission water
heaters.
b. Use of central water heating systems.
c. Use of built-in energy-efficient
appliances.
d. Building and subdivision orientation
should be to the north for natural
cooling.
e. Provide shade trees to reduce building
heat.
f. Use of energy-efficient and automated
controls for air conditioners.
g. Use of double -glass paned windows.
TRAFFIC and CIRCULATION
1. To improve traffic operations at the Shadow
Canyon/ Diamond Bar Boulevard
intersection, the City as a part of its long
] 11/09030018 ANIP
Prior to issuance of a building Department of Public Works
permit.
Receipt of impact fee.
9 Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Party _ Verification
range planning process has installed a
traffic signal at this location. Prior to the
approval of a final map, the applicant shall
submit a pro -rata share for this
improvement to the City of Diamond Bar
Public Works Department.
2. Due to forecasted traffic growth in the Prior to issuance of a building . Department of Public Works Receipt of Impact fee.
study area, a separate left -turn lane should permit.
be installed in the southbound direction at
the intersection of Diamond Bar Boulevard
and Brea Canyon Road to increase the level
of service from Level of Service "E" to an
acceptable level. The need for this
additional lane occurs under the traffic
condition of existing plus future background
plus Project traffic. This impact is not
significant individually, but could be
defined as significant cumulatively. Prior •
to the issuance of a building permit, the
applicant shall submit its incremental (pro -
rata) share to the City of Diamond Bar
Public Works Department for a separate
left -turn lane in the southbound direction at
the intersection of Diamond Bar Boulevard
and Brea Canyon Road.
3. In addition, a stop sign 'should also by Prior to issuance of a building Department of Public Works Receipt of impact fee.
installed at the intersection of Wagon Train permit.
Lane and Steeple Chase Lane in order to
minimize any vehicular conflicts in the
intersection. The stop sign should be
installed on Wagon Train Lane (stem of the
IB/09030018.MMP 10 Mitigation Monitoring Program
Vesting Tentative Map 47850
%Mw.A ■w.wi moo vim, www fiw MOM
Mitieation Measures Timing Responsible Party Verification
tee intersection) along with fifty feet of
double yellow striping and Type D raised
pavement markers, stop legend and limit
line. Prior to the issuance of a building
permit, the applicant shall submit its
incremental (pro -rata) share to the City of
Diamond Bar Public Works Department for
a stop sign at the intersection of Wagon
Train Lane and Steeple Chase Lane.
4. The project applicant shall provide its fair
share contribution toward striping a
separate right -turn lane and installing
appropriate signs in the southbound
direction at the intersection of Diamond Bar
Boulevard and Pathfinder Road.
5. The project applicant shall provide its fair
share contribution toward striping a
separate right -turn lane and installing
appropriate signs in the northbound
direction at the intersection of Diamond Bar
and Shadow Canyon Drive.
6. Parking for construction employees and
equipment will be provided on the
construction site, and no parking will be
permitted on existing streets.
7. No fencing, planting materials, or
obstruction of any kind (over 30 inches
high, as measured from the top of the
curb), shall be allowed in the clear sight
19/09030018 KIMP
Prior to issuance of a building
permit.
Prior to issuance of a building
permit.
Department of Public Works
Department of Public Works
During grading and Department of Public Works
construction activities.
Prior to approval of. street
improvement plans.
11
Department of Public Works
Receipt of impact fee.
Receipt of impact fee.
Field check.
Plan check and field check.
Mitigation Monitoring Program
Vesting Tentative Map 47850
1
Mitigation Measures Timing Responsible Party Verification
triangles (50'x50') at the intersections of
the main access roads which serve the
project site.
8. The project applicant shall provide its fair Prior to issuance of a building Department of Public Works Receipt of impact fees.
share contribution toward the construction permit.
of a sidewalk along the eastside of Diamond
Bar Boulevard across from the Country Hill
Shopping Center.
BIOLOGICAL RESOURCES
Walnut Woodland
1. A walnut woodland revegetation program
shall be approved by the City of Diamond
Bar prior to the issuance of grading
permits. The program shall include walnut
woodland replacement guidelines that
address mitigation site selection, site
preparation, irrigation system design,
planting (planting sizes and densities by
species), and maintenance (weed control,
irrigation requirements, and plant
replacement). Monitoring guidelines shall
be established that will include performance
standards (percent survival and percent
cover standards forplanted species),
monitoring methodology, and reporting
requirements. To ensure the replacement
of ecosystem values and not just of trees,
native understory plant species shall be
included in the walnut woodland
JB/09010018 MAIP
Prior to issuance of a grading
permit.
12
Department of Community
Development
low law • V" 1woE' VW VOR low off: *A IM 49-0, swi
Review revegetation program
and field check.
Mitigation Monitoring Program
Vesting Tentative Map 47850
AM J 'W Awa .� �'
Mitigation Measures Timing Responsible Party Verification
revegetation program. Understory plant
species shall be grown and obtained from •
native plant suppliers.' Walnuts planted in
the fuel modification areas shall follow the
guidelines.
2. Replacement walnuts shall be planted within
pr,)tected open space areas onsite in need of
habitat enhancement and where long-term
wildlife values can be realized. If this
criteria cannot be met onsite, replacement
of walnuts removed by project implementa-
tion shall be performed offsite at locations
agreed upon by the CDFG and the City of
Diamond Bar. An offsite location shall be
designated prior to the issuance of a
grading permit for VTM 47850.
3. All walnuts removed during project
implementation shall be replaced at a ratio
of 2: I, with a minimum container size of 5
gallons. Planting shall occur between
November and April. Walnut replacement
shall not exceed 45 replacement trees per
acre (with understory) or 30 trees per acre
(without understory). The project
proponent shall avoid and preserve walnut
trees to the maximum extent possible within
the grading plan.
Prior to issuance of a grading
permit.
Prior to issuance of a building
permit.
Department of Community
Development
Department of Community
Development
Plan check, field check, and
evidence of fund contribu-
tion.
Field check.
4. Walnut woodland revegetation areas shall Annual reports over a period of Department of Community Field check and review
be maintained (weed control and 3 years from completion of Development annual reports.
supplemental irrigation) by the subdivider grading.
18109030018,MMP 13 Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Party Verification
for a minimum of 3 years following
planting to ensure the successful
establishment and long-term survival of the
habitat. Irrigation shall be gradually
curtailed by the end of the third year to
ensure that the woodland plantings can
survive without long-term supplemental
irrigation.
5. All walnut woodland replacement efforts
Annual report over a period of
shall be monitored by the subdivider for a
five years from completion of
period of 5 years. Yearly monitoring
grading.
reports shall be submitted to the City of
Diamond Bar. These monitoring reports
shall document the success of the
replacement efforts (percent survival of
replacement plantings, percent cover, and
height data) and any required remedial
actions. At the end of the 5 year monitoring
period, -the performance standard shall be
two live replacement walnut trees for each
walnut tree removed.
Coast Live Oak Woodland
6. The feasibility of relocating small- to
Prior to issuance of a grading
moderate-sized oaks, not currently proposed
permit.
.for relocation, shall be analyzed for use in
the oak replacement efforts. Consideration
shall be given to collecting oak acorns
onsite for germination and use in the oafs
woodland mitigation efforts. An oak
woodland revegetation plan shall be
Department , of Community
Development
Department of Community
Development
Field check and review
annual reports.
Review revegetation plan and
field check.
Js/09030018.MNIP 14 Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Partv Verification
approved by the City of Diamond Bar prior
to the issuance of a grading permit. The
plan shall include a program to reduce the
amount of surface runoff reaching oak
woodlands. Surface runoff from
impermeable surfaces, irrigation systems,
and construction areas shall be directed
away from oak woodlands by means of a
Swale, French drain, or similar device. All
oaks within the upland habitat removed as
a result of project implementation shall be
replaced at a ratio of 4:1. To ensure the
replacement of ecosystem values and not
just of trees, native understory plant species
shall be included in the oak woodland
replacement program. Oak replacement
shall include 64 replacement oaks in upland
habitat. Oak replacement shall not exceed
45 replacement trees per acre. All oak
woodland replacement container stock shall
be inoculated with mycorrhyzal fungi to
enhance plant establishment. Replacement
oak trees shall consist of the following mix
of sizes:
• 5 percent - 5 gallon
25 percent - 15 gallon
• 50 percent - 24 -inch box
• 20 percent - 36 -inch box
7. The replacement requirements for riparian- Prior to issuance of a building California Department of Fish Receipt of 1600 Agreement.
associated oaks to be removed by project permit. and Game
implementation shall be determined through
JB/09030018.MMP
15
Mitigation Monitoring Program
Vesting Tentative Map 47850
1
Mir
discussions with the California Department
of Fish and Game as part of the Section
1600 process. The riparian -associated oaks
removed ' as a result of project
implementation shall be replaced at a ratio
of a minimum of 3:1. Oak replacement
shall include 21 replacement oaks in
riparian habitat.
8. Replacement oaks shall be planted within
protected open space areas in need of
habitat enhancement and where long-term
wildlife values can be realized. If this
criterion cannot be met onsite, replacement
of oaks removed as a result of project
implementation shall be performed offsite.
An offsite location shall be designated prior
to the issuance of a grading permit for
VTM 47850.
9. Oak woodland revegetation areas shall be
maintained (weed control and supplemental
irrigation) by the subdivider for a minimum
of 3 years following planting to ensure the
successful establishment and long-term
survival of the habitat. Irrigation will be
gradually curtailed by the end of the third
year to ensure that the woodland plantings
can survive without supplemental irrigation.
Prior to issuance of a grading
permit.
Annual reports over a period of
3 years from completion of
grading. -
Department of Community
Development
Department of Community
Development
10. All oak woodland replacement efforts shall Annual reports over a period of Department of Community
be monitored by the subdivider for a period 5 years from completion of Development
of 5 years. Yearly monitoring reports shall grading.
Plan check, field check, and
evidence of fund
contribution.
Field check and review of
annual reports.
Field check and review of
annual reports.
16 Mitigation Monitoring Program
IBI09030019 MKIP Vesting Tentative Map 47850
low am 4M
Mitigation Measures Timing, Responsible Party Verification
be submitted to the City of Diamond Bar.
These monitoring reports shall document
the success of the replacement efforts
(percent survival of replacement plantings,
percent cover, and height data) and any
required remedial actions. At the end of the
5 -year monitoring period, the performance
standard shall be two live replacement oak
trees for each oak remediation.
Riparian Habitats
11. Prior to the issuance of a grading permit, a
mitigation plan addressing potential impacts
on streambed, wetlands, or riparian habitats
shall be prepared by the subdivider in
conjunction with an application for a
Section 404 permit from the U.S. Army
Corps of Engineers (ACOS) and a Section
1603 Agreement with the California
Department of Fish and Game. These
agencies typically -require the replacement
of lost habitat values through the
enhancement of remaining streambed,
wetland, or riparian habitat, or through the
creation of new areas of such habitat. The
mitigation plan for riparian habitats shall
outline procedures for mitigation site
preparation (clearing, grading, topsoil
storage), irrigation, planting (seeding,
container plantings, transplantation), and
maintenance (weed control, irrigation
scheduling, replanting). Hydrological
Prior to issuance of a grading
permit.
U.S. Army Corps of
Engineers and California
Department of Fish and
Game
Receipt of Section 404
permit.
JB/09010016 WIP 17 Mitigation Monitoring Program
Vesting Tentative Map 47850
ISI
studies shall be performed to determine if
groundwater levels and surface water flows
will be adequate to sustain the restored
riparian habitat once established.
Methodologies and requirements shall. be
specified in the mitigation plan for
monitoring of the riparian habitat
replacement efforts, including performance
criteria and provisions for documenting the
results of the replacement efforts throughthe end of the monitoring per
Provisions to insure the long-term
preservation of riparian mitigation areas
shall be identified. Riparian habitat
replacement programs shall be submitted to
the U.S. Fish and Wildlife Service (as
biological advisor to the ACOS) and the
CDFG for review and approval.
12. Riparian mitigation implementation shall
libe pe mit issuance of a building
completed as soon as practicable
completion of project grading.
13. Riparian mitigation shall be monitored by
the subdivider for a 5 -year period following
planting. The subdivider shall submit
annual reports discussing the survival rate
of the mitigation to the City of Diamond
Bar.
A
Annual reports over a period of
5 years from completion of
grading.
Department of Community
Development
Department of . Community
Development, U.S. Army
Corps of Engineers, and
California Department of Fish
and Game
Field check.
Field check and review of
annual reports.
.z :.:.....:.... Mnnitnrinr Proaram
Vesting Tentative Map 47850
1B/09030018.MMP
�_ r a .w...... QIP AM
Mitigation Measures
Timing Responsible Party Verification
Natural Habitats Impacted During Construction
14. Prior to the issuance of a grading permit,
Prior to issuance of a grading Department of Public Works Plan check and field check.
the limits of proposed grading and
permit.
construction activities shall be delineated
with 8 -foot lengths of PVC pipe, mounted
on a rigid steel base for support. The first
18 to 24 inches of topsoils should be
scraped and stockpiled during grading.
This will be used in the replanting of trees.
15. Prior to the initiation of vegetation clearing
Prior to issuance of a grading Department of Community Plan check and field check.
or grading, all oaks and walnuts within 200
permit. Development
feet of construction activity shall be marked
for either protection, relocation, or
removal, both in the field and on
construction site plans. Oaks and walnuts
to be retained shall be protected from
construction damage through the installation
,
of temporary, rigid fencing. Fencing shall
be a minimum of 4 feet high and located at
least 15 feet outside the dripline of any oak
or walnut or group of oaks/walnuts. No
equipment storage or other activities shall
be allowed within these fenced areas.
Fencing shall remain in place for the
duration of construction activities.
r
16. A biological resource monitor, approved by
During construction activity. Department of Community Field check.
the City of Diamond Bar, shall be onsite
Development
during construction to ensure adherence to
all habitat protection measures.
JB/09030018.MMP
19
Mitigation Monitoring. Program
Vesting Tentative Map 47850
1
Mitigation Measures Timing Responsible Party Verification
17. In compliance with Section 3503.5 of the
California Fish and Game Code, a qualified
biologist shall determine the presence of
any raptor nests prior to or concurrent with
grading activities, the project applicant shall
contact CDFG, shall obtain and comply
with all appropriate procedures relative to
grading operations in proximity to those
nests, and shall provide verification of same
to the City. Resulting mitigation measures
may include restricting construction
activities near raptor nesting sites during
and immediately following the breeding
season.
Prior to issuance of a grading
permit and/or during grading.
Department of Community
Development
Review qualified biologist's
verification.
18. Pre -construction meetings shall be held Prior to commencement of Department of Community Field check.
between the biological resource monitor and grading and construction, Development
construction supervisors and equipment activities.
operators to review and ensure adherence to
all habitat protection measures.
19. During construction, measures to prevent During construction activities. Department of Public Works Field check.
erosion, such as use of silt fencing or hay
bales, shall be installed at the limits of
grading.
20. During construction, vehicle haul routes During construction activities. Department of Community Plan check and field check.
.between cut and fill locations shall be Development
restricted to a minimum number. Earth-
moving equipment shall be confined to the
narrowest possible corridor during
construction. Waste dirt or rubble shall not
be deposited on adjacent native vegetation.
)B]09030018.Mn1P 20 Mitigation Monitoring Program
Vesting Tentative Map 47850
MIR is
Mitigation Measures Timing Responsible Party Verification
Vehicle haul routes shall be identified on
construction plans and marked in the field,
in consultation with a qualified biologist, to
ensure minimization of impacts to
biological resources. Trenching for utilities
and irrigation lines shall be conducted
outside the dripline of individual oaks or
oak woodlands.
Natural Habitat Impacts Associated With Fuel Modification
21. All fuel modification requirements, such as
selective clearing, pruning, and wet zones,
shall be prohibited within 15 feet of the
dripline of any individual oak tree or within
50 feet of the dripline of any oak
woodland, except as otherwise required by
the fire marshall.
22. All large native shrub specimens (5 -inch
caliper or larger at base) within fuel
modification zones shall remain in place,
except as otherwise directed by the fire
marshall. Large native shrubs within the
fuel modification zone may be thinned and
pruned of all deadwood to reduce the fuel
load. Only highly flammable vegetation,
such as chamise, sages, and non-native
grasses should be selectively removed, as
required by the fire marshal[.
23. All thinning or selective clearing of
vegetation within the fuel modification zone
Upon completion of
revegetation.
Upon completion of
revegetation.
Los Angeles County Fire
Department
Los Angeles County Fire
Department
Upon completion o f Los Angeles County Fire
revegetation. . Department
Plan check and field check.
Field check.
Field check.
JB/09030018 AIAIP 21 Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Party Verification
should be completed by hand to prevent the
disturbance of the soil structure or
vegetation to be preserved. No herbicides
shall be used. Thinning should be done in
a manner to maintain a natural appearance.
24. The irrigated wet zone should serve as both Upon completion of Los Angeles County Fire Plan check and field check.
a fuel modification zone and as a buffer revegetation. Department
zone/transition area between the residences
and the open space area, and should be
designed to limit human intrusion.
Post -Construction Impacts to Biological Resources
25. The following list of plant species shall not Prior to issuance of a grading
be permitted in the landscape plan in any permit.
development areas (i.e., common areas and
private lots). These plants may potentially
invade natural areas and displace native
plant species. Such non-native species
include ice plant (Delosperma spp.), blue
gum (Eucalyptus. globulus), spotted gum
(Eucalypnus maculata), tree -of -heaven
(Ailanthus a/tissima), Brazilian pepper tree
(Srhinus terebinthifolias), Peruvian pepper
tree (S. mol/e), pampas grass (Cortaderia
sellowiana), fountain grass (Pennisetum
telaceum), Spanish broom (Spartium
junceum), German ivy (Senecio
mikaniodes), periwinkle (Vinca major),
tamarisk (Tamarix sp.), hottentot fig
(Carpobronts edulis), Jupiter's heard
(Centranthus ruber), Melia sp., cape
16IM30018 Mt,1P 22
Department of Community Review landscape plan and
Development field check.
Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Party Verification
honeysuckle (Tecomaria capensis), and
plumbago (Plumbago aurlcolata).
26. Landscaping within common areas and Prior to issuance of a grading
buffer zones shall be restricted to the use of permit.
native plants. These should include only
those species that were found to occur on
the site or in the immediate vicinity prior to
grading. Such native species include laurel
sumac (Malosma laurina), lemonadeberry
(Rhus integrifolia), California sagebrush
(Artemisia californica), Mexican elderberry
(Sambucus mexicana), coast live oak
(Quercus agrifolia), scrub oak (Quercus
dumosa), California black walnut (Juglans
californica), white sage (Silva apiana),
purple sage (Salida leucophylla), black sage
(Salvia mellifera), toyon (Heteromeles
arbutifolia), fuschia-flowered gooseberry
(Ribes speciosum), western poison oak
(Toxicodendron diversilobum), coyote brush
(Baccharls pllularls), mulefat (Baccharis
salicifolia), thistle (Cirsium sp.), California
everlasting (Gnaphallum californicum),
saw-toothed goldenbush (Ilazardla
squarrosa), telegraph weed (Heterotheca
grandiflora), coastal goldenbush (Isocoma
menziesii var. menziesit), California dodder
Cuscuta californica), rattlesnake weed
(Chamaesyce albomarginata), Santa
Barbara locoweed (Astragalustrichopodus),
deerweed (Lotus scoparius), lupine
(Lupinus sp.), purple sage -black sage
J W0903001 B.MM P 23
Department of Community Review landscape plan and
Development field check.
Mitigation Monitoring Program
Vesting Tentative Map 47850
J J _I
Mitigation Measures Timing Responsible Party Verification
hybrid (Salvia leucophylla x Salvia
mellifera), mesa bushmallow
(Malacothamnus faseiculatus), holly -leaved
redberry (Rhamnus llic(folia), chemise
(Adenostoma fasciculatum), narrow -leaved
bedstraw (Callum angusdfollum), arroyo
willow (Salix lasiolep(i), orange bush
monkey -flower (Mimulur aurandacus),
chaparral nightshade (Solanum xann),
western verbena (Verbena lasiostachys), big
leaf mistletoe (Phoradendron
macrophyllum), giant wild rye (Leymus
condensatus), and purple needlegrass
(Nassella pulchra). Landscaping on private
lots may use non-native plants.
27. Prior to the issuance of grading permits, an
urban runoff management plan prepared by
a qualified hydrologist shall be developed,to
control and reduce the amount of surface
runoff generated by local precipitation
events, as well as nuisance flows, and the
associated pollutants that may be tran-
sported along with stormwaters into natural
drainages. The plan shall be reviewed by
a qualified biologist to ensure compatibility
with biological resources. The conditions
of the plan will be subject to approval by
the City Engineer prior to issuance of a
grading permit.
28. Prior to the issuance of building permits, a
Buyer Awareness brochure shall be
Prior to issuance of a grading
permit.
Prior to issuance of a building
permit.
Department of Public Works
Department of Community
Development
Review Urban Runoff
Management Plan.
Review Buyer's Awareness
brochure.
JRIM30018.MMP 24 Mitigation Monitoring Program
Vesting Tentative Map 47850
9000 Ow �-" 41MW .AN* Ow .4m i& xw'• 4"0 -0 wil Iiia *m— � •Ifmi %W `ria No
e!e• >t■ir r r.� �■� +•s! cwt �� ar■r tttttti i �� � 1! � a I� � �
Mitigation Measures Timing Responsible Party Verification
developed to provide residents with
information on surrounding natural habitats
and resident wildlife, as well as guidelines
to ensure the continuation of wildlife values
of surrounding habitats. Guidelines to be
incorporated into this brochure include
domestic pet control, landscaping around
mature oaks, native landscaping, and
appropriate behavior in natural open space
areas.
29. Successful integration of development into Prior to issuance of a building
wildlife habitat depends on proper buffering permit.
at the interface of these two areas.
Development often results in an edge
condition where residential lots are located
adjacent to areas of natural open space. A
conceptual buffer plan using native plant
species has been developed for the
management of this edge condition. This
buffer will limit potential impacts to the
natural areas by screening development
from wildlife, capturing excess runoff from
landscape irrigation that could potentially
injure sensitive plants, and providing an
edge along residential lots that is
aesthetically pleasing while providing many
plant species that are valuable to wildlife.
This edge shall be designed so that it may
be integrated into a fuel modification plan
for the development that meets the
requirements of the Los Angeles County
Fire Department.
1B/09030018AMP . 25
Department of Community Review buffer plan.
Development
Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Party Verification
Native plants recommended for this buffer
include mesic species such as toyon,
California black walnut, and Mexican
elderberry.
Additional native plant species that are low
growing and of low fuel volume, and would
not impede views into natural areas,. could
also be used. These include golden yarrow
(Eriophyllum confird lorum), California
poppy (Eschscholzia californlea), monkey
flower (Diplacus spp.), heart -leaved
penstemon (Keckldla cordifolia), California
fuchsia (Epllobium spp.), deerweed (Lotus
scoparius), annual lupine (Lupinus spp.),
Opuntia spp., and Baccharis 'Twin Peaks.'
This zone shall be periodically thinned to
maintain low fuel levels, and should be
cleared of invasive grasses.
To help all plants mature as quickly as
possible and maintain all plant materials in
optimum condition, irrigation facilities shall
be installed as appropriate on slope areas
and maintained by the applicant until sold.
Maintenance shall then be the responsibility
of the property owner.
The use of fertilizers and pesticides within
transition zones shall be minimized. Only
nonresidual herbicides shall be used to
control persistent invasive species within
the landscape buffers. Mechanical clearing
16/09030018 NINIP - 26 Mitigation Monitoring Program
Vesting Tentative Map 47850
-0 r .mmw .WAMW ftwoo i9W67 -QNW% "-NNW `w am*
i i i i MM M Ii i M M MM = W# 'W in
Mitigation Measures Timing Responsible Party Verification
techniques such as grubbing and mowing,
and hand removal shall be used to eliminate
less persistent invasive species.
Subject to approval by the City of Diamond
Bar, the applicant shall provide for the
following:
a. Physical specification on the type and
degree of fencing allowed.
b. Enforcement of a mandatory leash law.
c. Guidelines for the maintenance of trash
receptacles and uneaten pet food.
d. Prohibition of the outside storage of pet
food.
e. The urban pollution basins shall be
maintained by the subdivider. The City
of Diamond Bar shall reserve the right
to maintain the urban pollution basins
and collect their costs should efforts by
the subdivider not meet City standards.
f. Existing dirt roads within the open
space area shall be used as
pedestrian/hiking/equestrian/biking
trails as much as possible. Any
additional trails shall be designed to
avoid sensitive biological resources.
Barbed wire or split rail fencing shall
JB 09030018 AINIP 27 Mitigation Monitoring Program
Vesting Tentative Map 47850
I { 1
J
Mitigation Measures
I
Timing
f
Responsible Partv Verification
be considered for highly sensitive areas
subject to possible human intrusion.
Hunting shall not be allowed within the
open space areas.
Unauthorized vehicular use shall be
restricted within the open space areas.
All trash (man-made materials) shall be
removed from natural open space areas on
a regular basis.
Invasive weedy species such as giant reed,
fennel, and artichoke thistle shall be
monitored by the subdivider and, if
necessary, these invasive plant species shall
be removed.
30. Signs shall be located in appropriate areas
to discourage human intrusion into natural
Prior to issuance of a building
Applicant,. HOA, and Field check.
open space and the Tonner Canyon SEA
permit.
Department of Community
Development
No. 15.
31. The effect of night lighting on wildlife shall
be
Prior to issuance of a building
Applicant, HOA, and Field check.
mitigated through the use of low-
intensity street lamps at the edge of
permit.
Department of Community
development, low -height lighting poles, and
Development
shielding by internal silvering of the globe
or external opaque reflectors.
1B/M30018.MMP 28 Mitigation Monitoring Program
Vesting Tentative Map 47850
rM � 0. INO•■ N' low til son 1"M Imm"= anew =
Mitigation Measures Timing Responsible Party Verification
A rr_MUNICS and VISUAL RESOURCES
1. All residential units on the project site shall
include setbacks from proposed property
lines. The applicant shall submit setback
information to the City for approval.
ARCHAEOLOGICAL RESOURCES
Prior to issuance of a building Department of Community Review setback information.
permit. Development
1. The applicant shall have the name and Prior to issuance of a grading Department of Public Works Field check.
telephone number of a City of Diamond permit.
Bar -approved licensed archaeologist
available at the construction site.
2. In the event a suspected cultural, historical
or prehistorical resource is encountered
during grading, construction, or any
activity associated with development of the
site, the applicant shall insure that all
activity will cease in the vicinity of that
suspected resource until a qualified
archaeologist can examine the find in place
and determine its significance. If a find is
authenticated, the archaeologist will
determine proper methods of handling the
artifacts for transport and placement in an
appropriate repository. Construction
activity may resume, after the artifact is
either retrieved or found to be not an
artifact of consequence.
3. Should a bonafide cultural, historical or
prehistorical resource be encountered, the
]8/09030018.MAIP
During grading and construc- Department of Community
tion activities, Development
During grading and Department of Community
construction activities. Development
29
Field check and review
archaeologist's findings.
Review monitoring report.
Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures Timing Responsible Party Verification
applicant shall be responsible for securing
the services of a qualified archaeologist
who shall be present onsite to monitor all
remaining grading activities.
4. A qualified archaeologist should be notified During grading and Department of Community Review archaeologist's
and invited to the pregrade meeting to set construction activities.. Development. findings.
the controls of observations during grading.
After the property is grubbed, but before
initial grading begins, area which could be
sensitive should be re -inspected. If
archaeological materials are found, their
significance should be ascertained and
salvage procedures implemented prior to
their destruction by grading.
5. The applicant shall inform the City During grading and Department of Community Receipt of notification.
Planning Division and the City Engineer if construction activities. Development
suspected archaeological or paleontological
artifacts are discovered during grading
operations. This notification shall occur in
writing, within 24 hours of the suspected
find. In the written notification, the project
manager shall identify the qualified
archaeologist who will inspect the find.
6. If a qualified archaeologist is called upon to . During grading and Department of Community Review archaeologist's
inspect a suspected find, that professional construction activities. Development findings.
will prepare a written report of the
significance of the find, including a
recommendation(s) for further action, if
any. A copy of this report shall be
transmitted to the Planning Division within
JB/09030019.MMP 30 Mitigation Monitoring Program
Vesting Tentative Map 47850
Mitigation Measures
Timing
Responsible Party
Verification
I week after inspection of the suspected
find.
PUBLIC SERVICES
I . Prior to issuance of a building permit, the
Prior to issuance of a building
Department of Public Works
Receipt of funds.
project applicant shall pay a development
permit.
fee to the Walnut Valley Unified School
District (WVUSD) in accordance with
California Government Code 53080 and the
school fees identified by the WVUSD.
2. Irrigation of open areas will be limited to
Prior to issuance of an
Department of Public Works
Field check.
that required to establish plants in place.
occupancy permit.
3. Homes will employ water conserving
Prior to issuance of a building
Department of Public Works
Plan check and field check.
technology which include such features as
permit.
low -flow shower heads and water -efficient
toilets, etc.
4. Site watering during grading activities shall
During grading activities.
Department of Public Works
Field check.
use reclaimed water if permitted and
available.
5. Landscape plans shall include the selection
Prior to issuance of a building
Department of Public Works
Review landscape plans.
of water -efficient plants, wherever possible.
permit.
M09030018 NINIP 31 Mitigation Monitoring Program
Vesting Tentative Map 47850
I 1 I
Sme 229 INS
EDIT „c„
VTM 47850
CONDITIONS OF APPROVAL
A. GENERAL REQUIREMENTS:
1. This approval of Vesting Tentative Tract Map No. 47850 shall not be effective
for any purpose until a duly authorized representative of the applicant has filed
with the Community Development Department an Affidavit of Acceptance,
thereby accepting all the conditions of this approval which Affidavit shall be
filed within 15 days of the date of approval.
2. In accordance with Government Code Section 66474.9(b)(1) and (2). The
subdivider shall defend, indemnify and hold harmless the City, its agents,
officers, and employees from any claim, action, or proceeding against the City
or its agents, officers, or employees to attack, set aside, void or annul, an
approval of the Application by the City, which action is brought within the
time period provided for in Government Code Section 66499.37.
Any condition imposed pursuant to this subdivision shall include the
requirement that the City promptly notify the subdivider of any claim, action,
or proceeding and that the City cooperate fully in the defense. If the City fails
to promptly, notify the. subdivider of any claim, action, or proceeding, or if the
City fails to cooperate fully in the defense, the subdivider shall not thereafter
be responsible to defend, indemnify, or hold harmless the City.
3. The property shall be maintained in a condition which is free of debris both
during and after the construction, addition, or implementation of the
entitlements granted herein. The removal of all trash, debris, and refuse,
whether during or subsequent to construction, shall be done only by the
property owner, applicant or by a refuse hauler who has obtained a permit for
such refuse hauling from the City of Diamond Bar. It shall be the applicants
obligation to insure that the waste hauler utilized is one which has obtained
permits from the City of Diamond Bar.
c:WJ37 si MOMaaw
1
low 12.9 INS
B. PLANNING REQUIREMENTS
1. That three (3) copies of the Vesting Tentative Tract Map No. 47850 presented
at the public hearing and marked Exhibit "A" and conforming to such of the
following conditions as can shown on a plan, shall be submitted to the
Community Development Director. Thereafter, the 57 lot residential
subdivision with one (1) common lot shall be developed and maintained in
accordance with the approved Vesting Tentative Tract Map.
2. The approval of the Vesting Tentative Tract Map No. 47850 is granted subject
to the approval and certification of Master Environmental Impact Report No.
91-2.
3. That all requirements of the Zoning Ordinance and of the underlying zoning of
the subject property must be complied with, unless otherwise set forth in the
permit or shown on the approved plan.
4. The applicant shall satisfy the Park Obligation by contributing land acreage or
the in -lieu fee to the City prior to recordation of the final map per code section
21.24.340. In the alternative, the applicant and the City by mutual
agreement, may engage in in-kind development or funding'of recreational
facilities in lieu of section 21.14.340. If such proposed agreement fails,
section 21.24.340 shall control.
5. Conditions, Covenants, and Restrictions (CC&R's) and Articles of
Incorporation of Homeowner's Association are required and shall be provided
to the Community Development Director and the City attorney for review and
approval prior to recordation of the final map. A Homeowners Association
(HOA) shall be created and responsibilities thereof shall be delineated within
the CC&R's. The CC&R's and Articles of Incorporation shall be recorded
concurrently with the Final Map or prior to the issuance of building permits,
whichever occurs first. A recorded copy shall be provided to the City
Engineer.
6. The project shall be designed so as to substantially comply with the CC&R's
implemented by the adjacent development heretofore known as "The Country".
The CC&R's should incorporate at a minimum, provisions which would
establish a maintenance program for urban pollutant basins, and all mitigation
measures within the Mitigation Monitoring Program, such that wildlife
movement corridors are left in an undisturbed and natural state. The CC&R's
will, to the fullest extent possible, be consistent with the CC&R's of "The
Country" in terms of lot size and other factors.
QWZTZXW1V7?d47 a.00N
2
Sme 229 INS
7. A clause shall be incorporated into the CC&R's which requires disputes
involving interpretation or application of the agreement (between private
parties), to be referred to a neutral third party mediation service (name of
service may be included) prior to any party initiating litigation in a court of
competent jurisdiction. The cost of such mediation shall be borne equally by
the parties.
S. The applicant shall prepare and submit to the Community Development
Director for approval prior to the sale of the first lot of the subdivision, a
"Buyers Awareness Package" which shall include, but not be limited to,
information pertaining to geologic issues regarding the property, wildlife
corridors, oak and walnut tree preservation issues, the existence and
constraints pertaining to SEA No. 15 and Tonner Canyon, explanatory
information pertaining to restrictions on use of properties as necessary and
similar related matters. The applicant shall institute a program to include
delivery of a copy of the "Buyers Awareness Package" to each prospective
purchaser and shall beep on file in the office of the applicant a receipt signed
by each such prospective purchaser indicating that the prospective purchaser
has received and read the information contained within the "Buyers Awareness
Package". The applicant shall incorporate within the CC&R's a reference to
the availability of the "Buyers Awareness Package" and the fact that a copy
thereof is on file in the office of the City Clerk of the City of Diamond Bar.
9. The applicant shall obtain approval by County Sanitation on the location of the
structures affecting County Sanitation easements and submit written evidence
to the City prior to issuance of a grading permit.
10. The Mitigation Monitoring Program (MMP) outlined within Master
Environmental Impact Report (MEIR) No. 91-2 shall be submitted to and
approved by the Community Development Director prior to the issuance of the
grading permit. Should a conflict exist between the Conditions of Approval,
the MMP as outlined in the MEIR No. 91-2; and the SEATAC Final Report
dated April 8, 1991, the conflict will be presented to the Community
Development Director for resolution.
11. Prior to approval of the final landscape plan the applicant shall demonstrate
that the landscaping palette for the project emphasizes the use of drought
tolerant, native plant species with low water requirements adapted to the inland
Southern California climate. In order to limit the potential threat of wildland
fires, low -fuel volume plants shall be incorporated into the revegetative plan.
The final landscape plan shall substantially comply with the recommendations
of the Final SEATAC Report, MEIR No. 91-2, and the preliminary landscape
plan submitted and approved by the Planning Commission and marked Exhibit
"A-1" and shall be submitted to the Community Development Director prior to
f ` issuance of any building permits. Indicate fence details, tree staking, soil
preparation, planting details, an automatic irrigation system and the
incorporation of xerotropic landscaping wherever feasible.
c:W.EZ s+es1VVW&Wcaw
S=8.12., INS
12. All irrigation equipment, slope planting and revegetated areas shall be _
continuously maintained in a healthy and thriving condition by the developer
or HOA until each individual unit is sold and occupied by the buyer. Prior to
releasing occupancy for those units, an inspection shall be conducted by the
Planning Division to determine that the planting is in satisfactory condition.
13. Exterior grading and construction activities (framing and roofing, etc.) shall be
restricted to 7:00 a.m. to 5:00 p.m. Monday through Saturday, except that
interior building construction activities shall not be limited. All construction
equipment shall be properly muffled to reduce noise levels.
14. Transportation of equipment and materials and operation of heavy grading
equipment shall also be limited to the hours of 7:00 a.m. to 5:00 p.m. All
equipment staging areas shall be located on the subject property. Dust
generated by construction activities shall be reduced by watering the soil prior
to and during grading activities. Use of reclaimed water shall be used
whenever possible.
15. Dust control mitigation measures shall comply with MEIR No. 91-2 and shall
be included and enforced under the Mitigation Monitoring program approved
by the. Community. Development Director. Measures may include but not be
limited to reducing dust by watering the soil prior to and during grading
activities. Use of reclaimed water shall be used whenever possible. _
16. The use authorized by this approval shall be commenced or construction
necessary and incidental thereto shall be started on or before the time limit
specified herein and thereafter diligently advanced on or before two (2) years
after the expiration of the appeal period. A one year extension may be
requested and granted.
17. The applicant shall pay development fees (including, but not limited to,
planning, Building and school fees) at the established rates, prior to issuance
of Building or Grading Permits, as required by the Community Development
and Public Works Directors.
18. Comply with all conditions of approval listed by the Engineering Dept. as
exhibited on Exhibit "C-2" .
19. prior to any occupancy permit being granted, these conditions and all
improvements shall be completed to the satisfaction of the Community
Development Director and City Engineer.
20. The subdivider shall contribute its pro rata share, estimated at $6,000.00, for
the baseline biological analysis prepared in August of 1992, Tonner Carryon _
and SEA No. 15.
c:¢srr"SIVnrnaw.cwv 4
Smvr e 119 .1"S
21. All residences will be required to receive approval via the Development
Review process by the Planning Commission or Community Development
Director prior to issuance of building permits.
22. Prior to final map approval, the owner shall make a bona fide application to
Diamond Bar Country Estates Association to annex this subdivision to that
Association. The owner shall be required to agree to annex upon recordation
of the final map, if all fees assessed by the Diamond Bar Country Estates
Association do not exceed the fees assessed per lot for annexation to the
Diamond Bar Country Estates Association for Tract No. 47722.
23. All down drains and drainage channels shall be constructed in muted earth
tones so as not to impart adverse visual impacts. Terrace drams shall follow
land form slope configurations and shall not be placed in exposed positions.
All down drains shall be hidden in swales diagonally or curvilinear across a
slope face.
24. The applicant shall participate in an oak and walnut tree replacement program
substantially conforming to the ratios and locations exhibited in JAM No. 91-
2 prior to issuance of occupancy permits.
25. Existing trees required to be preserved in place shall be protected with a
construction barrier in accordance with the Los Angeles County code and so
noted on the grading plans. The location of those trees to be preserved in
place and new locations for transplanted trees shall be shown on the detailed
landscape plans.
26. Prior to recordation or issuance of any permits, the applicant shall pay all
environmental and development fees at the established rates as required. All
Mitigation Monitoring Program fees to defray the cost of implementation and
monitoring by City staff and consultants retained by the City, are to be
deposited with -the City prior to the issuance of building or grading permits and
all costs related to the ongoing monitoring shall be secured by the City prior to
Final Map approval.
27. The final map shall clearly delineate and dedicate to the City the right to
prohibit the construction of buildings (or other structures) within those areas to
be designated on the map as building restriction areas.
28. The location of the fences demarcating the construction rights prohibited area
shall be clearly delineated on the final map.
29. Prior to finalization of any development phase, sufficient improvement plans
shall be completed beyond the phase boundaries to assure secondary access and
drainage protection to the satisfaction of the City Engineer. Phase boundaries
shall correspond to lot lines shown on the approved tentative map.
c:ZsrMMjVn WW.cav 5
,j%jw Illy .1"S
30. The use authorized by this approval shall be commenced or construction
necessary and incidental thereto shall be started on or before two (2) years
after the expiration of the appeal period. A one (1) year extension may be
requested and granted.
31. Lot Nos. 2, 3, 4, 5, 15, 16, 17, 18, 34, 35, 36, 46, 47, 48 and 49 shall
provide a minimum lot/street frontage of 60 feet at the property line, as
defined in Title 22 of the City's Subdivision Code. All other lots shall have a
minimum lot/street frontage of 125 feet.
32. All lots shall be a minimum of 20,000 gross square feet in size and
constructed with a minimum pad size of 10,000 square feet.
33. In compliance with Section 3503.5 of the California Fish and Game Code, a
qualified biologist shall determine the presence of any raptor nests prior to or
concurrent with grading activities, the project applicant(s) shall contact the
California Department of Fish and Game, shall obtain and comply with all
appropriate procedures relative to grading operations in proximity to those
nests, and shall provide verification of same to the City.
34. The applicant is to contribute $10,000 to the Los Angeles County Fire
Department, in lieu of providing an alternative location for the helipad on-site.
Should the Los Angeles County Fire Department not need the funds for the
-heilpad, then the City will use the contribution for fire protection
enhancement.
C. ENGINEERING DEPARTMENT REQUIREMENTS EXHIBIT "C -I"
Pill-ITIOPWO]RI
1. All easements existing prior to final map approval must be identified. If an
easement is blanket or indeterminate in nature, a statement to that effect must
be shown on the final map in lieu of showing its location.
2. Subdivider shall submit a title report/guarantee and a subdivision guarantee
showing all fee owners and interest holders must be submitted when a final
map is submitted for map check. This account with the title company must
remain open until the final map is filed with the County Recorder. An
updated title report/guarantee and subdivision guarantee must be submitted ten
(10) working days prior to final map approval.
3. The subdivider shall submit to the City Engineer the detail cost estimate of all
off-site improvements, prior to approval of the final map.
oiih'rr6Rs►vTuaMCON
6
12., TINS
4. The subdivider must submit recorded documents indicating that the project will
have proper/adequate right -of -entry to the subject site via the private streets
within "The Country".
5. The tract shall be annexed to the Lighting and Landscape Maintenance
Assessment District 38.
6. Street centerline monuments shall be set to mark the intersections of streets,
intersections of streets with the tract boundary and to mark either the
beginning and end of curves or the points of intersection of tangents thereof,
or other intermediate points to the satisfaction of the City Engineer. New
centerline monument ties set as part of this subdivision must be approved by
the City Engineer, in accordance with City Standards, and centerline
monument tie notes shall be submitted to the City engineer prior to issuance of
building permits.
7. Where subdivision boundary monuments are not found at the time of making
the survey for the final map, new boundary monuments must be set in
accordance with the Subdivision Map Act, State law, the City Subdivision
Code and City Standards and are subject to approval by the City Engineer
prior to approval of building permits.
_ 8. If any required public improvements have not been completed and accepted
by the City prior to the approval of the final map, the subdivider shall enter
into an agreement with the City to complete the improvements and shall post
the appropriate security.
7�
9. All site grading, landscaping, irrigation, street,, sewer,, water and storm drain
improvement plans shall be coordinated for consistency and approved by the
City Engineer prior to final map approval.
10. Street names shall be submitted for City review and approval prior to approval
of the final map. These names must not duplicate existing street names
within the City of Diamond Bar's postal service zip codes.
11. House numbering clearance by the City Engineer, is required prior to
issuance of building permits.
12. The detail drawings and construction notes shown on the submitted plans are
conceptual only and the approval of this map does not constitute approval of
these notes and details.
c:¢errUSIVn V= -CON
7
13. Grading of the subject property shall be in accordance with the Uniform
Building Code, City Grading Ordinance No. 7 (1992), Hillside Management
Ordinance or as amended and acceptable grading practices. The final grading
plan shall be in substantial conformance with the grading shown as a material
part of the tentative map as approved. The maximum grade of driveways
serving building pad areas shall be 15 %.
14. At the time of submittal of the 40 -scale grading plan for plan check, a detailed
soils and geology report shall be submitted to the City Engineer for approval.
Said report shall be prepared by a qualified engineer and/or geologist licensed
by the State of California. The report shall address, but not be limited to, the
following:
(a) Stability analyses of daylight shear keys with a 1:1 projection from
daylight to slide plane; projection plane shall have a minimum safety factor of
1.5.
(b) All soils and geotechnical constraints (i.e., landslides, shear key locations,
etc.) shall be delineated in detail with respect to proposed building envelopes.
Restricted use areas and structural setbacks shall be considered and delineated
prior to recordation of the final map.
(c) Soil remediation measures shall be designed for a "worst case" geologic
interpretation subject to verification in the field during grading.
(d) The extent of any remedial grading into natural areas shall be clearly
defined on the grading plans.
(e) Areas of potential for debris flow shall be defined and proper remedial
measures implemented as approved by the City Engineer.
(f) Gross stability of all fill slopes shall be analyzed as part of geotechnical
report, including remedial fill that replaces natural slope.
(g) Stability of all proposed slopes shall be confirmed by analysis as approved
by the City Engineer.
(h) All geologic data including landslides and exploratory excavations must be
shown on a consolidated geotechnical map using the 40 -scale final grading plan
as a base.
15. Grading plan (24"x 36") must be designed in compliance with
recommendations of the soils and engineering geology reports. All remedial —
earthwork specified in the final report shall be incorporated into the plans.
c.V.FrI a IVTMCW.00N
8
;%an0 J'I;9 INS
16. Grading plan must be signed and stamped by a California registered Civil
Engineer, Soils Engineer and registered Geologist.
17. All identified flood and geologic hazard areas associated with this proposed
development which cannot be eliminated to the satisfaction of the City
Engineer must be indicated on the final map as "Restricted Use Area". The
subdivider shall dedicate to the City the right to prohibit the erection of
buildings or other structures within the restricted use areas on the final map.
18. As a custom -lot subdivision, the following requirements shall be met:
a) Surety shall be posted and an agreement executed guaranteeing completion
of all grading and on-site drainage facilities necessary for dewatering all
parcels to the satisfaction of the City Engineer prior to final map approval and
prior to the issuance of grading permits.
b) Appropriate easements for safe disposal of drainage flows that are
conducted onto or over adjacent parcels, are to be delineated and shown on
the final map to the satisfaction of the City Engineer prior to issuance of
grading. permits.
C) On-site drainage improvements, necessary for dewatering and protecting
the subdivided properties from drainage flows, are to be installed prior to
issuance of building permits for construction upon any parcel that may be
subject to drainage flows entering, leaving, or occurring within a parcel for
which a building permit is requested.
d) All slope banks in excess of five (5) feet in vertical height shall be seeded
with native grasses or planted with ground cover for erosion control upon
completion of grading or an alternative method of erosion control shall be
completed to the satisfaction of the City Engineer. In addition, a permanent
irrigation system shall be provided.
19. Completion and stabilization of all man-made slopes, removal of all landslide
materials and reconstruction of slopes must comply with the City Building
Code, all other provisions of this tentative map approval and Ordinances
including those requirements for erosion protection and landscaping.
20. The geotechnical consultant of record, Harrington Geotechnical Engineering,
Inc., must provide written confirmation of their acceptance of the geotechnical
data and information provided previously by other consultants for the vesting
tentative tract which has been utilized or relied upon in preparation of their
geotechnical reports.
c:uB'rnutSJVTA W.cav 9
sIIa e 129 2M5
21. The following geotechnical issues must be addressed and approved by the
City, prior to approval of the grading plan: _
a) Areas of potential for debris flow need to be defined and proper remedial
measures recommended.
b) Stability of all proposed slopes must be confirmed by analysis. Unstable
slopes shall be redesigned or stabilized utilizing slope reinforcement.
c) All landslides must be shown on a consolidated geotechnical map. Specific
remedial measures shall be implemented pursuant to requirements of City
Code and Ordinances.
d) Stability of back cuts (i.e. excavation of natural slopes) must be analyzed.
22. Street improvement plans (24"06"), prepared by a registered Civil Engineer,
shall be submitted to and approved by the City Engineer prior to final map
approval. Security shall be posted and an agreement executed to the
satisfaction of the City Engineer and City Attorney guaranteeing completion of
the public and/or private street improvements, prior to final map approval.
23. Cul-de-sacs, in accordance with all applicable City Standards, must be
constructed at the terminus ends of Hawkwood Road (public) and Steeplechase
Lane (private).
24. Install street name signs at all intersections within the Tract.
25. Prior to any work being performed in public right-of-way, fees shall be paid
and a construction permit shall be obtained from the City Engineer's Office in
addition to any other permits required.
26. Street improvement plans for all streets shall be designed with a maximum
grade of 12 %. Prior to any work being performed on the streets, fees shall be
paid and construction permits shall be obtained from the City Engineer's
Office in addition to any other permits required.
27. Construct base and pavement on all streets and access roads to pump station,
and the emergency access road to southerly property line in accordance with
the City approved soils report and City Standards. Vehicular access must be
provided to all "Urban Pollutant Basins" with a minimum width of 15', with
12' of pavement and with a maximum grade no greater than 20%.
28. Prior to approval of the final map, the developer shall contribute $8,550.00 _
towards the construction of sidewalk along the east side of Diamond Bar
Boulevard across from the Country Hills Shopping Center.
C.W FrMSIV WMM.cox
10
Jme 129 11R95
DRAINAGE
29. A final drainage study shall be submitted to and approved by the City Engineer
prior to final map approval. All drainage facilities shall be designed and
constructed as required by the City Engineer and in accordance with the
County of Los Angeles Standards. Private (and future) easements for storm
drain purposes shall be offered and shown on the final map for dedication to
the City. The private storm drain facilities shall be maintained by the
homeowners association and this shall be assured through the CC&R's.
30. Trees are prohibited within 5 feet of the outside diameter of any storm drain
pipe measured from the outer edge of a mature tree trunk.
31. Prior to finalization of any development phase, sufficient improvements plans
sand
Shall be completed beyond the phase boundaries to assure secondary
drainage protection to the satisfaction of the City Engineer. Phase boundaries
shall correspond to lot lines shown on the approved tentative map.
32. Prior to placement of any dredged or fill material into any U.S.G.S. blue line
stream bed, a 404 permit shall be obtained from the Army Corps of Engineers
subject to the provisions of nation wide permit for discharges of dredged or fill
materials into water ways of the United States. Not withstanding a permit to
place any fill in the U.S.G.S. blue line stream bed a written Permission from
affected property owners must be obtained prior to approval of the final map
and issuance of a grading permit. An agreement with the California
Department of Fish and Game shall be obtained and submitted to the City
Engineer prior to approval of the final map and issuance of a grading permit.
33. Each dwelling unit shall be served by a separate sewer lateral which shall not
cross any other lot lines. The sanitary sewer system serving the tract shall be
connected to city sewer system. Said system shall be of the size, grade and
depth approved by the City Engi =, County Sanitation District and Los
Angeles County public Works Department, prior to approval of the final map.
34. The subdivider must obtain a sewer connection Permit from the City and
County Sanitation District. The subdivision must be annexed into the County
Consolidated Sewer Maintenance District and appropriate easements for all
sewer main lines and pump station must be provided and accepted by the
City, with approval of the final map.
35. Prior to approval of the final map, the subdivider must conduct an engineering
analysis to determine the capacity of sewer lines from the site to the County
Sanitation District trunk line. ff the system is found to be of insufficient
capacity the problem must be resolved to the satisfaction of the City Engineer.
Q VM7Wivnvna C0N 11
Jum S29 29M
36. Subdivider, at his sole cost and expense, must construct the sewer system
including the pump station in accordance with the City, Los Angeles County
Public Work Department and County Sanitation District Standards.
TRAFFI
37. Intersection line of sight designs shall be reviewed by the City Engineer for
approval in conformance with adopted policy.
38. Pavement striping, marling and street name signing shall be installed to the
satisfaction of the City Engineer.
39. An additional left -turn lane shall be striped and appropriate signs installed in
the southbound direction at the intersection of Diamond Bar Boulevard and
Brea Canyon Road.
40. A stop sign shall be installed at the intersection of Wagon Train Lane and
Steeplechase Lane. The stop sign shall be installed on Wagon Train along
with fifty feet of double yellow striping, Type D pavement markers, stop
legend and limit line.
41. Stop signs shall be installed at the intersection of Steeplechase Lane and street
"A", subject to the approval by the City Engineer. _
42. Developer shall contribute $28,500.00 towards the installation of a traffic
signal at intersection of Diamond Bar Boulevard and Shadow Canyon Drive
prior to approval of the final map.
43. Provide separate utility services to each parcel including water, gas, electric
power, telephone, and cable TV (all underground) in.accordance with the
respective utility companies standards. Easements shall be provided as
required. All utilities shall be placed underground.
44. The developer shall be responsible for the relocation of existing utilities as
necessary and placing them underground. Facilities within that easement
owned by General Telephone Company shall be relocated as necessary to
allow telephone company to relinquish its easement. Subdivider shall, at it's
own expense, cause General Telephone Company to relinquish this easement.
45. Prior to recordation of the final map, a written certification shall be submitted
to the City from Walnut Valley Water District, GTE, SCE, SCG and Jones
Intercable stating that adequate facilities are or will be, prior to issuance of _
building permits, available to serve the proposed project and they have no
objection to recording of the map. Such letter must be issued by the utility
companies at least 30 days prior to final map approval.
C.icsr1M1Vn W&M-CON
12
SMS 229 INS
46. On all lots where the effect of existing easements may reduce the usable
building pad area to less than that shown on the tentative map, such easements
shall be relocated or otherwise removed from the required building pad area to
the satisfaction of the Community Development Director and City Engineer
prior to approval of the final map.
47. Lot "A" shall be conveyed to the Homeowners Association and ' the owner shall
dedicate to the City the right to prohibit the erection of buildings and other
structures thereon.
48. On the final map Lot 13, Lot 15 and/or Lot 16, as shown on tentative map,
shall be modified to include the entirety of the "Remainder Parcel".
49. No construction equipment nor related construction traffic shall be permitted to
enter the site from Hawkwood Drive.
50. As reclaimed water supply is not currently available, Subdivider shall agree to
design and construct, to the satisfaction of the City Engineer and the Walnut
Valley Water District, main and service lines capable of delivering reclaimed
water to all portions of the subdivision and the system shall be designed to
permit "switch over" of non-domestic services on each lot at such time a
reclaimed water supply is available to the subdivision. Security shall be posted
to guarantee the performance of this agreement. Subdivider shall install, prior
to approval of final grading, a portion of the system consisting of main and
service lines capable of delivering reclaimed water -to those portions of the
subdivision for which the homeowners association is responsible for irrigation
and/or landscape maintenance. This portion installed shall provide for
switchover from domestic service to reclaimed service at such time as it is
available.
51. Prior to approval of the grading plan and final map, Subdivider shall submit
permission to grade from all affected property owners outside the boundaries
of the subdivision and shall submit documents granting necessary easements
for maintenance and repair of inlets and storm drains to the satisfaction of the
City Engineer.
C.LLsTIMIVTM40 s.CON
13