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1 <br /> • Date August 23, 2001 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 2168 Address 441 Charter Way, Stockton, California <br /> ARCO Environmental Engineer Kyle Christie <br /> Consulting Co/Contact Person _Delta Environmental Consultants, Inc 1 Jay R Johnson <br /> Consultant Protect No D000-329-1 <br /> Primary Agency/Regulatory ID No Lori Duncan, San Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER(Second 2001) <br /> 1 Performed quarterly groundwater monitoring and sampling for the second quarter 2001 Groundwater <br /> samples were collected from monitoring wells MW-1 through MW-8, MW-1 B, MW-1 C, MW-8B and <br /> MW-8C and submitted for chemical analysis <br /> 2 Delta compiled and evaluated groundwater monitoring data <br /> WORK PROPOSED FOR NEXT QUARTER(Third 2001) <br /> • The next sampling event is tentatively scheduled for August 2001 Groundwater samples will be collected <br /> and analyzed for total petroleum hydrocarbons as gasoline (TPHG) using U S Environmental Protection <br /> Agency (USEPA) Method 8015 DHSILUFT, and for benzene, toluene, ethylbenzene, and total xylenes <br /> (BTEX), tertiary butyl alcohol (TBA), methyl tertiary butyl ether (MTBE), di-isopropyl ether (DIPS), ethyl <br /> tertiary butyl ether (ETRE), tertiary amyl methyl ether (TAME) and 1,2-dichloroethane (1,2-DCA) using <br /> USEPA Method 8260 <br /> Current Phase of Protect Monitoring <br /> Frequency of Groundwater Sampling MW-1 through MW-8, MW-1B, MW-IC, <br /> MW-8B and MW-8C= Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Sample Date May 17, 2001 <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 18 90 to 23 01 feet bgs <br /> Direction of Groundwater Flow East-Southeast <br /> Groundwater Gradient 0 0020 ft/ft <br /> C 1ARCO121681QTRLY1200112168-2QOIReport DOC Delta <br />