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• Date November 2, 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 Project No D000-329-1 <br /> Primary Agency/Regulatory ID No Lori Duncan, San Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER (Third 2001) <br /> 1 Performed quarterly groundwater monitoring and sampling for the third quarter 2001 The monitoring <br /> event was coordinated with the adjacent service stations Groundwater samples were collected from <br /> monitoring wells MW-1 through MW-8, MW-113, MW-IC, MW-86, and MW-8C, and submitted for <br /> chemical analysis <br /> 2 Delta compiled and evaluated groundwater monitoring data <br /> WORK PROPOSED FOR NEXT QUARTER(Fourth 2001) <br /> The next sampling event is tentatively scheduled for November 2001 Groundwater samples will be <br /> collected and analyzed for total petroleum hydrocarbons as gasoline (TPHG), benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX) using USEPA Method 8015/8020 DHS LU1=T, and for tertiary butyl <br /> alcohol (TBA), methyl tertiary butyl ether, (MTBE), di-isopropyl ether (DIPE), ethyl tertiary butyl ether <br /> (ETRE), tertiary amyl methyl ether (TAME), and 1,2-dichloroethane (1,2-DCA) using USEPA Method <br /> 8260A <br /> Current Phase of Project Monitoring <br /> Frequency of Groundwater Sampling MW-1 through MW-8, MW-1 B, MW-1 C, <br /> MW-813 and MW-8C=Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Sample Date Au ust 16, 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 20 12 to 24 34 feet b s <br /> Direction of Groundwater Flow East <br /> Groundwater Gradient 0 011 ft/ft <br /> P\ARC0121681QTRLY1200112168-3Q01 Report DOC Delta <br />