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1 2 0 Field and Laboratory Procedures This section provides a summary of the field and laboratory procedures used during the June 1999 quarterly monitoring event 1 2 1 Sampling Methods And Procedures Groundwater samples were collected by Dames & Moore on June 7, 1999 Field records of ' sampling are attached in Appendix A Prior to sampling, the static water level was measured at monitoring wells DMW-1 through DMW-7 using an electric water level indicator Only monitoring wells DMW-6 and DMW-7 were sampled, in accordance with the Work Plan dated September 14, 1998 The sampled monitoring wells were purged using a submersible pump, which was steam cleaned prior to use The wells were purged until a minimum of three casing volumes were removed from each well, and until the field-measured temperature, pH, and specific conductivity stabilized Purged groundwater was stored in polyethylene tank The wastewater was disposed into the American Molding and Mill sanitary sewer system, in accordance with the Special Permit issues by the City of Stockton on March 10, 1999 Water samples were collected from monitoring wells using disposable polyethylene bailers ' A new bailer was used at each well One duplicate groundwater sample (MW-60) was collected at DMW-6 The duplicate sample was collected in the same manner as the primary sample, following collection of the primary sample Certified clean one liter glass sample containers, supplied by the laboratory, were used ' during the collection of groundwater samples The samples were placed on ice immediately following collection, and kept in coolers until delivery to laboratory ' 22 Laboratory Procedures Groundwater samples were analyzed by Quanterra, Inc , located in West Sacramento, ' California The samples were analyzed for TPH-D using EPA Method 8015M Copies of the laboratory reports are attached in Appendix B DAMES&MOORE 2 J 1AFPIREPORTIMQRPT DOC