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1 <br /> February 14, 1992 <br /> y ARCO Service Station No 2330, Stockton, California <br /> I <br /> Ground-Water Monitorini' <br /> We returned to the site on January 7, 1992, to measure depths to water in the wells, collect <br /> r <br /> ground-water samples for subjective analyses, and collect water samples for laboratory <br /> analyses of dissolved hydrocarbons We observed no subjective evidence of hydrocarbons <br /> in the water samples (Table 3) Our field methods are described in Appendix A <br /> Disposal of Soil and Water <br /> Soil cuttings generated during drilling were stored onsite on and covered with plastic <br /> sheeting We collected four soil samples from the drill cuttings after each drilling events <br /> These samples were composited into one sample at the laboratory and analyzed to evaluate <br /> disposal options for the soil At ARCO's request, soil was transported and disposed of by <br /> . Dillard Trucking Inc <br /> The drums containing the water from developing and sampling were labeled and temporarily <br /> stored onsite pending laboratory results At the request of ARCO, the water was <br /> transported and disposed of by Baulch Petroleum of Melpitas, California <br /> Laboratory Analyses and Results <br /> Soil and water samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg) <br /> using Environmental Protection Agency (EPA) preparation Method 5030 and modified EPA <br /> Method 8015 and benzene, toluene, ethylbenzene, and total xylene isomers (BTEX) using <br /> EPA Method 8020 Soil samples having the highest reading on the PID were submitted for <br /> analysis of total lead using EPA Method 6010 Laboratory analyses were performed at <br /> Sequoia Analytical Laboratory in Concord, California(Hazardous Waste Testing Laboratory <br /> Certificate No 1624) Water samples were also analyzed for fecal coliform bacteria Copies <br /> of laboratory reports are in Appendix C <br /> 30W3-4w 5 <br />