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J . H . KLEI N FELDER & ASSOCIATES GEOTECHNICAL CONSULTANTS . MATERIALS TESTING ENVIRONMENTAL RESOURCES • May 5, 1987 9795 BUSINESS PARA DRI\E SUITE D File: 24-2053-1 SACPAXANTO CA956r1794 1916, 3661701 Cr Mr. John Johnson The Customer Company P.O. Box 886 Benicia, California 94510 SUBJECT: Food & Liquor Store 76, Manteca, California Dear J.J. : The enclosed analytical results are for soil. sample S-03 collected from the soil piles stored at the sand and gravel facility located on Moffat Boulevard, Manteca, California. Approximately 18 truck loads of soil (325 cubic yards) were excavated and removed from the Food & Liquor Store (#76) located at 890 North Main Street, Manteca, California. The soil was excavated from beneath the removed pump island where hydrocarbon contamination had been indicated from soil samples collected previously. The soil was hauled to the sand and gravel facility located on Moffat Boulevard. To minimize uncontrolled aeration, the soil was placed on and covered with plastic. iA Photovac TIP, using a photoionization detector (PID) was used to screen two soil samples collected from each of the 18 soil piles. The PID was calibrated with a 50 parts per million (ppm) benzene to set a reference for relative comparison of the field readings. Field screening readings ranged from 50 to 460 parts per million by volume (ppmv) and are shown on Table 1. TABLE 1 PID FIELD SCREENING READINGS SAMPLE POINT READING my AMPLE POINT READING my SP-37 340 SP-55 420 SP-38 350 SP-56 350 SP-39 270 SP-57 370 SP-40 240 SP-58 420 SP-41 380 SP-59 460 SP-42 375 SP-60 430 SP-43 380 SP-61 380 SP-44 355 SP-62 460 SP-45 150 SP-63 290 SP-46 290 SP-64 300 SP-47 390 SP-65 420 SP-48 375 SP--66 460 SP-49 420 SP-67 325 SP-511 340 SP-68 300 SP-51 440 SP-69 390 SP 52 400 SP 70 360 SP-53 440 SP-71 50 SP-54 410 SP-72 50 t