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to <br /> • Date October 20, 1997 <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 (Third 1997): <br /> 1. EMCON collected quarterly groundwater samples for laboratory analysis from monitoring wells MW-1 <br /> through MW-3 and vapor well VW-3. <br /> 2. EMCON compiled and evaluated groundwater monitoring data. <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth 1997): <br /> 1. ARCO will continue to perform quarterly groundwater monitoring. The next sampling event is <br /> tentatively scheduled for November 1997. <br /> 2. EMCON will prepare and submit a workplan to conduct an additional subsurface investigation to the <br /> San Joaquin County Public Health Services (SJCPHS). <br /> 3. EMCON will obtain appropriate drilling permit from SJCPHS and will install one additional groundwater <br /> monitoring well at the subject site. <br /> Current Phase of Project: Monitoring_ <br /> Frequency of Groundwater Sampling: Quarterly <br /> Frequency of Groundwater Monitoring: - Quarterly <br /> Sample Date: _ August 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: 49.43 to 50.71 <br /> Direction of Groundwater Flow: East to Northeast <br /> Groundwater Gradient: 0.005 <br /> r <br /> SALVN1 NPJ"805\08051470.3CS-971prrz:k <br />