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SECONDUARTER 1997 GROUND WATER MONITORING REPORT <br /> Q San Joaquin County <br /> Montgomery Ward Auto Service Center Public Health Services Department <br /> 5400 Pacific Avenue, Stockton, CA Site Code 2163 <br /> 1 identification, preservative added, if any, date, time and EAI project number, and immediately <br /> placed into an Ice chest chilled using frozen blue and crushed ice The samples were kept <br />' chilled until delivered to the laboratory for analytical testing All samples were logged on a <br /> chain of custody record form (see Appendix B) <br /> 2 3 SAMPLING EQUIPMENT CLEANING PROTOCOL <br />' The submersible pump and hose system (Equipment), used only to purge the wells prior to <br /> sampling, was decontaminated between each event using the following procedure <br />' ■ The Equipment was flushed in a solution of Alconox detergent and tap water, and <br /> ■ The Equipment was flushed with tap water <br />' 2 4 EFFLUENT HANDLING <br /> All effluent generated during purging, sampling and equipment decontamination activities was <br /> sealed in labeled 55-gallon drums The drums were stored in a secured area on the <br /> Montgomery Ward site pending proper disposal <br /> 3.0 ANALYTICAL TESTING <br /> The samples were delivered for analytical testing to American Scientific Laboratories (ASL), a <br /> state certified hazardous waste testing laboratory (Certificate No 2200) ASL is certified for <br /> all tests completed as part of this investigation The samples were tested for halogenated <br /> volatile organic compounds using EPA Method 8010, benzene, toluene, ethylbenzene, xylenes <br /> (BTEX) and methyl tertiary butyl ether (MTBE) using EPA Method 8020, and total petroleum <br /> hydrocarbons as gasoline (TPH-G) using modified EPA Method 8015 The sample obtained <br /> from well MW-4 was also analyzed for MTBE by EPA Method 8240B since this sample had <br /> the the highest concentration of TPH-G The results of this testing are shown in Table 2 and <br /> Figure 3 <br /> Water samples obtained from wells MW-1, MW-2, MW-3, and MW-4 were also analyzed for <br /> dissolved oxygen, pH, nitrates, nitrites, ammonium, sulfates, phosphates, standard bacteria <br /> Iplate count, and coliform The results of the testing are shown an Table 3 The laboratory <br />■ repoits are contained in Appendix D <br /> Project No 1232 - 2 - ENVIRONMENTAL AUDIT, INC <br />