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Date MayS, 2000 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 00548 Address 1612 Hammer Lane, Stockton, California <br /> ARCO Environmental Engineer Chuck Carmel <br /> Consulting Co/Contact Person IT Corporation/David Foley <br /> Consultant Project No 806778 <br /> Primary Agency/Regulatory ID No Lor[ Duncan, San Joaquin County Public Health Services _ <br /> WORK PERFORMED THIS QUARTER (First 2000) <br /> I <br /> 1 Groundwater samples were collected from monitoring wells MW-1 through MW-6 for laboratory <br /> analysis <br /> 2 IT compiled and evaluated groundwater monitoring data <br /> WORK PROPOSED FOR NEXT QUARTER (Second 2000) <br />• 1 Quarterly groundwater monitoring will continue on behalf of ARCO The next sampling event is <br /> tentatively scheduled for June 2000 Monitoring wells MW-1 through MW-6 will be sampled and <br /> analyzed for total petroleum hydrocarbons as gasoline using USEPA Method 8015 modified, and for <br /> benzene, toluene, ethylbenzene, and total xylenes, and methyl tert-butyl ether (MTBE) using USEPA <br /> Method 8020 <br /> Current Phase of Project Monitoring/Remediation <br /> Frequency of Groundwater Sampling Wells MW-1 through MW-6= Quarterly <br /> Frequency of Groundwater Monitoring _ Quarterly <br /> Sampling Date March 28, 2000 <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 23 39 to 25 71 <br /> Direction of Groundwater Flow Southeast <br /> Groundwater Gradient 0 002 ft/ft <br /> CP1N 1CamPklData\ArchivelArco105481Qtr1y1054SQ100 DOC 481st 1 IT Corporation <br /> 05/05/00 <br />