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20 FIELD AND LABORATORY PROCEDURES <br /> This section provides a summary of the field and laboratory procedures used during the <br /> third quarter 1999 monitoring event <br /> 2 1 Sampling Methods And Procedures <br /> ' Groundwater samples were collected by Dames & Moore on September 9, 1999 Field <br /> records of sampling are attached in Appendix A Prior to sampling, the static water level <br /> ' was measured at monitoring wells DMW-1 through DMW-7 using an electric water level <br /> indicator All seven monitoring wells were sampled, in accordance with a verbal request <br /> from Ms Carol Oz of the PHS/EHD Previous sampling was limited to wells MW-6 and <br /> MW-7, as required by the PHS/EHD letter dated August 3, 1998 <br /> Groundwater sampling was conducted in accordance with procedures described in the <br /> Work Plan dated September 14, 1998 The sampled monitoring wells were purged using a <br /> submersible pump, which was steam cleaned prior to use The wells were purged until a <br /> minimum of three casing volumes were removed from each well, and until the <br /> field-measured temperature, pH, and specific conductivity stabilized Purged groundwater <br /> was stored in polyethylene tank The wastewater was disposed into the American Molding <br /> and Mill Works sanitary sewer system, in accordance with the Special Permit for <br /> Wastewater Discharge P 106 984 104, Issued by the City of Stockton on March 10, 1999 <br /> Water samples were collected using disposable polyethylene bailers A new bailer was <br />' used at each well One duplicate groundwater sample (MW-60) was collected at DMW-6 <br /> The duplicate sample was collected in the same manner as the primary sample, following <br /> collection of the primary sample <br /> "Certified clean" one liter glass sample containers, supplied by the laboratory, were used <br /> during the collection of groundwater samples The samples were placed on Ice <br /> immediately following collection, and kept in coolers until delivery to laboratory <br /> 2 2 Laboratory Procedures <br /> Groundwater samples were analyzed by Quanterra, Inc , located in West Sacramento, <br /> California The samples were analyzed for TPH-D using EPA Method 8015M Copies of <br /> the laboratory reports are attached in Appendix B <br /> DAMES& MOORE 4 11AFP\RFPORT19911_01 dOL <br />