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projects and from sampling on 20 April 2000. From these data we can conclude: <br /> 4.2.1. Waste Oil USTs <br /> All groundwater samples, MW-2, B-3 and B-4 evidenced contamination from gasoline, BTEX <br /> (partial) and MTBE. Contamination levels were reasonably comparable, indicating that the <br /> contaminants have dispersed fairly widely, probably beyond B-4 (45 ft.) and B-3 (20 ft.). <br /> Analysis of MW-2 sampled on 20 April 2000 shows contamination from motor oil, gasoline, <br /> BTEX, MTBE, DIPE and diesel. The former waste oil USTs are an apparent source of <br /> groundwater contamination from a number of petroleum hydrocarbons. <br /> 4.2.2. Diesel USTs <br /> Both MW-1 and NW-3 evidenced diesel contamination and MW-I also had low levels of ethyl <br /> benzene and xylenes. MTBE was not present in groundwater from either MW-1 or MW-3. <br /> It appears that diesel contamination has spread in the groundwater from MW-1 to MW-3 <br /> (approximately 87 ft.). <br /> The recent sampling on 20 April 2000 confirmed the contamination in both MW-I and MW-3. <br /> Curiously, the level of diesel contamination in NW-3 dropped to less than half the level in the <br /> earlier sampling, while the level of diesel contamination in MW-1 increased slightly. <br /> 5.0 SURVEY OF WELLS <br /> This survey was completed in Jan 1999, and repeated from the Work Plan dated 28 Jan 1999. <br /> A survey of domestic, municipal, agricultural, industrial and any other wells within a 2000 foot <br /> radius of the site (Figure 4) was conducted by EI's subcontractor, Helmick and Lerner. <br /> Additionally, EI contacted municipal water suppliers, nearby industries and the San Joaquin <br /> County Public Health Services, Environmental Health Division to complete the survey of wells <br /> within 2000 feet of 3105 South El Dorado Street. It was determined that California Water <br /> Services does not have municipal wells within this radius. <br /> EI contacted the San Joaquin County Public Health Services, Environmental Health Division and <br /> reviewed the soil and groundwater files for Cove Contractors, Inc. and Heinz USA, it was <br /> Environeering,Inc. Project No.00-005.05 Page 3 <br />