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2.0 PURPOSE <br /> 1 <br /> ' The purpose of this report is to present analytical data collected during the March 22, <br /> 1996 quarterly sampling event Sample collection methodology, laboratory analytical <br /> methods, analytical data and an evaluation of the data are described in subsequent <br /> ' sections of this report <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 nine ground water monitoring wells to obtain representative <br /> 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 /> 1 <br /> ' 4.0 GROUNDWATER SAMPLE COLLECTION <br /> On March 22, 1996, the nine monitoring wells were purged and sampled Prior to <br /> purging, each well was measured for depth to water and total depth accurate to within <br /> 0 01 feet Each well was then purged with a submersible pump until a minimum of three <br /> casing volumes of water had been removed and temperature, pH, electrical conductivity <br /> and dissolved oxygen had stabilized to within 10% of the previous readings This insured <br /> that formational waters were drawn into each well All measured parameters were <br /> recorded on the appropriate field logs and are presented in Appendix B Table 1 <br /> summarizes the field logs for the measured parameters <br /> The pump, hose, and electrical leads were decontaminated before and between each well <br /> purging by washing the exterior with a solution of laboratory grade detergent The pump <br /> American Geological Services, Inc <br /> CA95DE-029 <br /> 5 <br /> i' <br />�1 <br />