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i' <br /> PRELPAINARY HYDRO(.EOLOGIC ASSESSMENT REPOR4 <br /> 1399 East Yoaamlte Avenue,Manteca,California <br /> Delta Project No.40-88-480 <br /> Page 9 <br /> TABLE I <br /> Soil Chemistry Results <br /> Depth <br /> Location Date Sampled &Ltj B 'I' E X EVB EDC TP14 <br /> MW-la 8110/88 5 NF NF NF NF NF NF <0.5 <br /> '10 0.001 0.007 NF 0.003 NF NF 0.3 <br /> 15 0.004 0.005 NF 0.003 NF NF <O.1 <br /> 20 0.05 0.06 0.42 1.6 NF NF 28.0 <br /> ' SB-1' 8/10/88 5 IAF 0.005 NF NF NF NF <0.1 <br /> 10 NF 0.002 NF NF NF NF •;0.1 <br /> 15 NF 0.006 NF NF NF NF <0.1 <br /> 20 NF 0.013 NF NF NF NF <0.1 <br /> SB-21 8/11/88 5 NF 0.002 NF NF NF NF <0.1 <br /> 10 NF 0.004 NF NF NF NF 0.2 <br /> -. 15 NF 0.004 NF NF NF NF <0.1 <br /> 20 NF 0.064 NF NF NF NF <O.i <br /> S13-3a 8111/88 10.5 NF 0.003 NF NF NF NF <0.1 <br /> MW-2b 4/27188 } 20 NF NF NF NF NF NF <0.1 <br /> MW-3b 4127j 15 0.1 0.2 0.1 1.0 NF NF 60 <br /> 20 NF NF NF NF NF NF <0.5 <br /> NOTE:All results in parts per million (ppm) <br /> NF = Not Found <br /> 'Soil borings advanced by E:S Environmental <br /> bSoil borings advanced by Delta Environmental Consultants, Inc. <br /> 1.3.2 Mortitorine Wells <br /> Monitoring well MW-1 was completed within the soil boring located immediately south of the underground <br /> storage tanks (USTs). This well was constructed of 2-inch-diameter,Schedule 40 PVC blank casing and <br /> 2-inch-diameter,Schedule 40 PVC well screen with 0.020-inch slats. The well was developed by removing <br /> water from the well screen by purging with nitrogen gas. <br />