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• construction logs are included in Appendix A <br /> 4.3 Groundwater Sampling and Analysis <br /> During the course of the soil remediation activities, the new groundwater mnrtoring <br /> wells were monitored quarterly according to the Regional Water Quality Control Board LUFT <br /> guidelines The quarterly groundwater samples were analyzed in a State of California-certified <br /> laboratory for <br /> ■ TPH-d by EPA Method 8015M, <br /> ■ TPH-g by EPA Method 8015, <br /> ■ BTEX by EPA Method 8020, and <br /> III Total Lead by EPA Method 7241 <br /> Analytical results from the quarterly groundwater monitoring are summarized in Table 4-1 <br /> • Copies of laboratory reports and Chain-of-Custody records are included in Appendix B <br /> Samples were collected according to MARK standard procedures and methods presented in <br /> Appendix C <br /> Monitoring wells MW-1, MW-2, and MW-3 were first sampled in May 1993 Well MW4 <br /> had not yet been installed As shown in Table 4-1, laboratory analyses for the MW-1 sample <br /> found no hydrocarbon constituents above the laboratory method detection level (MDL) <br /> Analysis of the groundwater sample from MW-2 detected 11 mgll TPH-d, 9 9 mg/1 TPH-g, 2 8 <br /> m&4 benzene, 018 mg/l toluene, and 0 3 mg/l xylenes The MW-3 sample analyses detected 019 <br /> mg/l TPH-d, 011 mg/l TPH-g, and 0 0018 mg/l xylenes Lead was not analyzed in any of the <br /> samples No other constituents were found above the laboratory MDIs <br /> Sampling and analysis of groundwater from MW-4 was first conducted in October 1993 <br /> Diesel fuel was detected at 0 34 mg/l, but TPH-g and BTEX constituents were not found above <br /> • the laboratory MDU Lead at 0 018 mg/l was also detected <br /> FASCLOSE 4 4-2 92-1177102 36 <br />