HomeMy WebLinkAbout20200909113038027 (2)e0 `calcofteefirl& Inc.
October 13, 1995
Mr. Bernist Mazur
DIAMOND BAR EAST PARTNERS
3480 Torrance Boulevard, Suite 300
Torrance, CA 90503
SUBJECT: Geotechnical Review of Precise Grading Plan for 2828 Bentley Way, Lot 6,
Tract 47851, Crystal Ridge Estates, Diamond Bar, California
HGEI Project No. 91-02-0109A-06
REFERENCES: 1) "Geotechnical Report of Rough Grading for Lots 1-17 and 20-48,
Vesting Tentative Tract 47851, Diamond Bar, California," Dated
October 11, 1994, Prepared by HGEI, Project No. 91-02-0109A.
2) Rough Grading Plan, Sheets 1 thru 7, Tract 47851, Prepared by
Hunsaker & Associates, Inc.
3) Precise Grading Plan for the Subject Lot, Dated September 14,
1995, Prepared by Pfeiler & Associates, Engineers.
4) Standard Recommendations for Precise Grading, Slope
Maintenance and Foundation Design for the Subject Tract, Dated
September 20, 1995, by HGEI, Project No. 91-02-0109A.
Dear Mr. Mazur:
In response to a request from R. Gould & Associates, Inc., we have reviewed the
referenced precise grading plan for Lot 6 of Tract 47851.
The referenced plan was reviewed from a geotechnical standpoint for conformance with
our recommendations only. The plan was not reviewed as to the accuracy of dimensions,
measurements, calculations or any non-geotechnical portion of the design.
Based upon our review it appears that the referenced plan is in conformance with our
previous recommendations. During this review the following items were noted:
Batavia Business Center, 1938 North Batavia Street, Suite N, Orange, CA 92665 (714) 637-3093 ® (800) 924-7645 ® FAX (714) 637-3096
DIAMOND BAR EAST PARTNERS
Project No. 91-02-0109A-6
October 13, 1995
Page 2
Comparison of the pad elevation shown on the precise grading plan with the as -
graded elevation shown on the rough grading plan indicates that no significant
grading is planned as part of the lot development. Maximum depth of new cut or
fill is on the order of 1'/2 feet.
2. No significant changes to the on -site or adjacent slopes are currently planned. The
homeowner should be informed that future grading to alter the slopes should not be
performed without review by a geotechnical consultant familiar with rough grading
of the tract. It should be noted that the upper portion of the rear slope is part of a
structural shear key. In addition, the homeowner should be informed of the
importance of slope landscaping, maintenance and erosion control and should be
provided with guidelines pertaining to slope maintenance (Ref. 6).
3. The proposed residence location is outside the foundation setback line shown on
Plate A-1 of the geotechnical report of rough grading (Ref. 3). As a result, special
deepened foundations will not be necessary on this lot.
We have stamped and signed five copies of the precise grading plan and have forwarded
them to' Pfeiler & Associates for submittal to the City of Diamond Bar. One copy was
retained for our files.
We trust that this letter/report is adequate for your current needs. If you have any
questions or require further assistance, please call.
Very truly yours,
HARRINGTON GEOTECHNICAL ENGINEERING, INC.
ay
Stanley Schweitzer, P.E.
Senior Geotechnical Engineer
Distribution: Addressee (1)
R. Gould & Associates (1`)
Pfieler & Associates (3) attn: Lynn Mutch
QIDOCSIOBAR\PLANRVMLOT06PLN. RVW