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Groundwater sampling <br /> Upon completion of monitoring well installation the wells will be <br /> sampled and the extracted water analyzed for the following consti- <br /> tuents: <br /> Total petroleum hydrocarbons: high and low boiling points <br /> Benzene <br /> Toluene <br /> Xylene <br /> Ethyl Benzene <br /> Diesel <br /> Motor Oil <br /> Before a sample is obtained at least three well casing volumes will <br /> be purged and pH/conductivity measurements will be allowed to stab- <br /> ilized within 5% of prior measurement values to ensure that a repre- <br /> sentative sample is taken. The sample bottles will be filled without <br /> agitation to minimize the chance of volatization and upon completion <br /> the samples will be .placed in an iced_ cooler and delivered to a state <br /> certified laboratory within 24 hours. <br /> All sampling equipment shall be decontaminated prior to reuse <br /> using the following procedures:. <br /> * Wash with nonphosphate detergent <br /> * Rinse with tap water <br /> * Rinse at least once with deionized organic-free tap water <br /> To comply with requirements set forth by the San Francisco Bay <br /> Regional Water Quality Control Board (RWQCB) the groundwater <br /> sampling will occur quarterly for the duration of one year so <br /> that one complete hydrologic cycle can be observed. <br /> REPORT PREPARATION <br /> Upon completion of each phase of field activities a report wil be <br /> filed with the Health Dept. which contains the appropriate infor- <br /> mation as outlined in the SJLHD Leaking Underground Storage Tank <br /> Investigative Formats. <br />