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assess changes in groundwater levels and concentrations of TPH-D in groundwater at the Site 1 3 Scope of Work Monitoring activities conducted during the second quarter of 2000 included the following activities o Measurement of water levels in all seven monitoring wells on May 26, 2000, • Sampling of groundwater in seven monitoring wells (DMW-1 through DM-7), and • Analysis of groundwater samples for TPH-D with Northwest Cleanup Procedure 20 FIELD AND LABORATORY PROCEDURES This section provides a summary of the field and laboratory procedures used during the second quarter 2000 monitoring event 2 1 Sampling Methods And Procedures Groundwater samples were collected by URS/Dames & Moore on May 26, 2000 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 Groundwater samples were collected from all seven monitoring wells Groundwater sampling was conducted in accordance with procedures described in 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 temporarily stored in a polyethylene holding tank The wastewater was disposed into the American Molding and Mill Works sanitary sewer system in accordance with the Special Permit for Wastewater Discharge P 106 984 104, issued by the City of Stockton on March 10, 1999 Water samples were collected using disposable polyethylene bailers A new bailer was used at each well One duplicate groundwater sample (MW-70) was collected at DMW-7 The duplicate sample was collected in the same manner as the primary sample, following collection of the primary sample Dames&Moore 3 J 1AFPIREPORTIQ2-2000 DOC