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HYD <br /> +r ENVINTAL <br /> TECH ,INC. <br /> �. HETI conducted a safety briefing with B & F Drilling personnel prior to the <br /> commencement of drilling. All personnel present on-site reviewed and signed a <br /> copy of the Field Crew Health and Safety Plan prepared for this site. The Field Crew <br /> V <br /> Health and Safety Plan is included in Appendix B. <br /> On July 12 and 13, 1993, B & F Drilling of Rancho Cordova, California, supervised by <br /> HETI, used a B53 hollow-stem auger drill rig to drill five soil borings and install <br /> monitoring wells in each, designated MW-1 through MW-5. The borings were <br /> advanced to a depth of between 19 and 39 feet below grade. A California-modified <br /> split-spoon sampler, lined with three brass tubes, was used to collect soil samples at <br /> five-foot intervals. With the exception of MW-4, the shallowest soil sample from <br /> each borehole was sealed with teflon tape and plastic end caps, labeled, documented <br /> on a chain-of-custody form and placed on ice for transport to the analytical <br /> laboratory. The analyzed sample from MW-4 was collected at 16 feet, the first non- <br /> `' debris soil material encountered (refer to MW-4 well log for subsurface detail). <br /> All soil samples collected were also retained for visual lithologic description using <br /> the United Soil Classification System and for volatile headspace analysis using an <br /> Organic Vapor Meter (OVM). Organic vapor meter readings are not a quantitative <br /> determination of hydrocarbon concentrations in the soil samples, but they are <br /> useful in determining the relative magnitude of hydrocarbon concentrations. Soil <br /> cuttings generated during drilling were stored at the site. OVM readings for specific <br /> soil samples and complete sample descriptions are presented in Appendix D. <br /> V <br /> All soil samples submitted for laboratory analyses were analyzed for Volatile <br /> Organic Compounds WOO by EPA Method 8240, Extractable Organic Compounds <br /> (EOC) by EPA Method 8270 and for the CAM 17 Metals using EPA Methods 6010, <br /> 7060, 7471, and 7740. CAM Metal analytical methods are listed in Appendix F. Soil <br /> sample analyses were performed by PACE, Inc., a state DHS-certified laboratory, <br /> located in Novato, California. <br /> 4 <br />