HomeMy WebLinkAboutParcel 3 Geotechnical Investigation (2)
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ENVIRONMENTAL & GEOTECHNICAL ENGINEERING NETWORK
I October 23, 2003
I Westfall Construction Company
I Post Office Box'1550
'Wildomar, California 92595
,(909) 677-75751 FAXI(909) 677-1766
I Regarding:
GRADI,NG PLAN REVIEW/ADDENDUM TO THE
GEOTECHNICAL FEASIBILITY STUDY
Toyota 'of Temecula
Assessor's Parcel Number: 921-680-003
Rarcel 3 of Parcel Map 23354
4'1902 Motor Car Parkway
City of ifemecula, Riverside County, California
ProjectlNumber: T2755-CS
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I Attention:
Mr. Pat Fay
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I Reference:
1.
,EnGEN Corporation, Geotechnical Feasibility Study, Toyota of Temecula,
:Assessor's Parcel Number: 921-680-003, Parcel 3 of Parcel Map 23354,
:41902 Motor Car Parkway, City of Temecula, County of Riverside,
,California, Project Number: T2755-GFS, report dated March 10, 2003.
2. ,Soil Tech, Inc., Geotechnical Testing/Grading Report, Parcels 1-9 of
,Tentative Parcel Map 23354, Project Number: T2483-C-88, report dated
,January 6, 1989.
3. iEngineering Ventures, Inc., Conceptual Grading Plan, Toyota of
,Temecula, Parcel 3, Parcel Map 23354, M.B. 152/74-76, City of Temecula,
,plans dated June 19, 2003.
I Dear Mr. Fay:
Iln accordance with your request and written authorization, the Referenced NO.3 Conceptual
I Grading Plan has been reviewed, and is acceptable from a geotechnical perspective.
I Based on our review of the Referenced NO.2 Report, the materials identified in the Referenced
I No. 1 Report as "undocumented fills" have now been confirmed as documented. Therefore, the
I previously engineered fill material is considered competent and may remain in place. After
, reviewing the Referenced No. 1 and NO.2 Reports and the Referenced NO.3 Plan, and based
, on our understanding ,that the proposed structures will consist of masonry block office structures
I and service bays, specific earthvvork recommendations are as follows:
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Westfall Construction Company
Project Number: T2755-CS
October 2003
Page 2
Proposed Northern Structure
Once the proposed structure has been cut to grade, the eastern portion of the structure will be
founded into native I bedrock material whereas the western portion will be located over
approximately 3-feet of previously engineered fill material. Therefore, due to the existence of a
cutlfill transition, the eastern cut and shallow fill portions of the proposed structure area should
be overexcavated to a depth of 3-feet below finish grade elevation and to a horizontal distance
of 5-feet outside the proposed building footprint. Preparation of the bottom material as well as
fill placement should adhere to the recommendations in the Referenced NO.1 Report.
Proposed Southern Structure
Once the proposed structure has been cut to grade, the footprint of the entire structure will be
located entirely into previously existing fill material measuring approximately 3 to 12-feet in
thickness. These conditions are considered suitable for the proposed development. Prior to
excavation of footings, the top 12-inches of the finish grade material should be scarified,
moisture conditioned to :t2 percent of optimum and recompacted to 90 percent relative
:;ompaction.
Should you have any questions regarding this submittal, please contact our office at your
convenience.
Distribution: (4) Acfdressee
SRW/OB:hh
FILE: EnGEN/Reporting/CSfT2755-CS Westfall Construction, Grading Plan Review
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EnGEN Corporation