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• Date February 20, 1998 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No: 02186 Address: 3212 North California Street, Stockton, California <br /> ARCO Environmental Engineer: Paul Supple _ <br /> Consulting Co./Contact Person: EMCON/Jay R. Johnson <br /> Consultant Project No: 20805-147.003 <br /> Primary Agency/Regulatory ID No: Steve Sasson, San Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER (Fourth 1997): <br /> 1. EMCON prepared and submitted a workplan to conduct an additional subsurface investigation to the <br /> San Joaquin County Public Health Services (SJCPHS). <br /> 2. EMCON obtained the appropriate drilling permit from SJCPHS and installed one additional <br /> groundwater monitoring well (MW-4) at the subject site on October 30, 1997. <br /> 3. EMCON collected quarterly groundwater samples for laboratory analysis from monitoring wells MW-1 <br /> through MW-4 and vapor well VW-3 and prepared this quarterly report. <br /> WORK PROPOSED FOR NEXT QUARTER (First 1998): <br /> 1. ARCO will continue to perform quarterly groundwater monitoring. The next sampling event is <br /> tentatively scheduled for February 1998. <br /> Current Phase of Project: Monitoring <br /> Frequency of Groundwater Sampling: _ Quarterly <br /> Frequency of Groundwater Monitoring: _ - Quarterly <br /> Sample fate: November 20 ,1997 <br /> Is Free Product(FP) Present on Site: No <br /> FP Recovered this Quarter: NA <br /> Cumulative FP Recovered to Date: NA <br /> Approximate Depth to Groundwater: 48.36 to 50.17 <br /> Direction of Groundwater Flow: East <br /> Groundwater Gradient: 0.005 <br /> s� <br /> SAON;\PJM805 08051470.3DS-98',pzusmer.2 <br />