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• Since t 2°e tdmaro Geotechnical and Environmental Consultants Engineering and Chemical Laboratories November 13 , 1990 TL #790-056-02 Invoice ;70801 For: Dames & Moore 1320 E. Shaw Avenue, Suite 110 Fresno, CA 93710 Project: Tank Excavation and Backfill Chevron Service Station Hwy 99 and Morada Lane Stockton, California PO. No . 16000-250-44 Account No . 114-071 Subject: Spot Soil Density Tests conducted on the tank excavation backfill soils . Dear Mr. Irwin: This report presents the individual compaction test results of the in-place density tests conducted on the backfill soils placed in the tank removal excavation at the above referenced location. The scope of our testing was authorized by Mr Mike Irwin with Dames & Moore on October 18 , 1990 . The tests were performed by Val Baroni., Doug Davidson, Harold Holland, and Dennis Thompson of our Modesto office on October 19 , 22 , 23 , 24 , 25, 26 , and 27 , 1990 . Project Description: This project consists of the previous removal of underground storage tanks and backfill of the resulting excavation. According to Mr. Irwin, the excavation measured approximately 60 by 60 feet in plan dimension and was about 15 feet deep. Project Specifications * According to Mr. Richard Johnson the following specifications shall apply: Uniform Building Code Standard No . 70-1 . All fill soils shall be compacted to a minimum of 90 percent of maximum density as determined by the UBC 70-1 . C 2527 Fresno Street • PO Box 1472 C 9401 West Goshen Avenue Fresno Catifornia 93716 • (209) 268-7021 Visalia California 93291 • (209) 651 2190 140s Granite Lane Suite 1 r 3701 Pegasus Drive Suite 124 4loaesto California 95351 • (209) 523 0994 Bakersfield Califorma 93308 1805=392 -�28