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f J. H. KLEI N FELD ER & ASS00A GEOTECHNICAL CONSULTANTS • MATERIALS TESTIN ! � LAND & WATER RESOURCES 2825 EAST MYRTLE STREET �� STOCKTON.CA 95205-4794 FEB (209)948-1345 a1 HEWM File No. S-1 IT/� November 22, 1 Tracy School District 315 East 11th Street Tracy, CA 95376 Attention: Mr. Robin Blakley Subject: SOIL BORING dt GAS CONTENT TESTS CLOVER SCHOOL ON EAST BEVERLY PLACE TRACY, CALIFORNIA/P.O. #76591 Gentlemen: In this letter, are presented the results of a soil boring and gas content tests performed to determine the extent of gasoline contamination in soils beneath a recently removed gasoline tank. Our services were performed in response to gasoline odor detected during the subject gasoline tank removal. Representatives of our firm drilled one test boring on September 17, 1985, adjacent to the open pit where tanks had recently been removed. The test boring extended to maximum depth of 15 feet below existing ground surface. Soil and water samples were obtained in order to observe and test for gasoline content. Samples were obtained by driving a 2-inch inside diameter sampler into the soil using a 140-pound hammer falling approximately 30 inches. Soil samples were capped with aluminum foil and plastic caps and water samples were placed in sanitary containers. They were kept cool until delivery to the laboratory for gasoline content testing. In general, the soil conditions encountered consisted of a sandy gravel fill material from the surface to approximately 8 feet. A dense silty sand extended from 8 feet to the maximum depth drilled of 15 feet. No gas odors were detected in the surface 8 feet of sampling. Gas odor was detected in the samples obtained below 8 feet. Groundwater was encountered at 13 feet below the surface in the teat. boring. More detailed descriptions of the soil conditions encountered in the test boring are presented on Plate III. All soils have been classified according to the Unified .Soil Classification System presented on Plate Il. Gasoline Content Tests were performed by Canonie Engineers of Stockton on a water sample obtained from approximately 13 feet in the boring adjacent to the pit. A copy of. their results is presented at the end of this report. The test results are as follows: OTHER OFFICES- 5unwrvale•Sangamon•Stockton•Sacramento.•Fenno•Faifneld• Rohnert Paris•Merced 0 Los Angeles •Reno• Las Vegas•5t."Ge".Unh•19A1tYw•;.