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1 <br /> 2.0 PURPOSE <br /> ' The purpose of this report is to present analytical data collected during the June 19, 1996 <br /> quarterly sampling event Sample collection methodology, laboratory analytical <br /> methods, analytical data and an evaluation of the data are described in subsequent <br /> 1 sections of this report <br /> 1 <br /> 3.0 SCOPE OF WORK <br /> ' The following tasks were conducted in order to meet the objectives of this phase of the <br /> investigation at this site <br /> • Collect ground water elevation data accurate to 0 01 feet <br /> ' • Purge and sample six ground water monitoring wells to obtain representative samples <br /> • Submit all ground water samples to a California State certified analytical laboratory <br /> for analysis of petroleum hydrocarbon constituents <br /> Prepare this report summarizing the methodology and analytical data obtained and <br /> making recommendations for further work as warranted <br /> 4.0 GROUNDWATER SAMPLE COLLECTION <br /> On June 19, 1996, six monitoring wells were purged and sampled Monitoring wells <br /> MW-2, MW-3 and MW-4 were removed from the quarterly sampling program as <br /> ' approved by the San Joaquin Public Health Services, Environmental Health Division <br /> Prior to purging, each well was measured for depth to water and total depth accurate to <br /> within 0 01 feet Each well was then purged with a submersible pump until a minimum <br /> ' of three casing volumes of water had been removed and temperature, pH, electrical <br /> conductivity and dissolved oxygen had stabilized to within 10% of the previous readings <br /> This insured that formational waters were drawn into each well All measured parameters <br /> were recorded on the appropriate field logs and are presented in Appendix B Table 1 <br /> summarizes the field logs for the measured parameters <br /> 3 <br /> CA95DE-029 American Geological Services, Inc <br /> ' <br /> S <br /> 1 <br />