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i <br /> r� <br /> Date _ February 22, 2001 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 02168 Address 441 Charter Way, Stockton, California <br /> ARCO Environmental Engineer Kyle Christie <br /> Consulting Co/Contact Person Delta Environmental Consultants, Inc /Jay R Johnson <br /> Consultant Project No D000-329-1 <br /> Primary Agency/Regulatory ID No Lon Duncan, San Joaquin Coun Public Health Services <br /> WORK PERFORMED THIS QUARTER (Fourth 2000) <br /> 1 Performed quarterly groundwater monitoring and sampling for fourth quarter 2000 Groundwater <br /> samples were collected from monitoring wells MW-1 through MW-8, MW-18, MW-1C, MW-813 and <br /> MW-8C and submitted for chemical analysis <br /> 2 Delta compiled and evaluated groundwater monitoring data <br /> 3 Delta submitted a report documenting the findings of a soil and groundwater investigation conducted <br /> at the site during the third quarter 2000 <br /> • WORK PROPOSED FOR NEXT QUARTER(First 2001): <br /> The next sampling event is tentatively scheduled for February 2001 Groundwater samples will be <br /> collected and analyzed for total petroleum hydrocarbons as gasoline (TPHG) using U S Environmental <br /> Protection Agency (USEPA) Method 8015, for benzene, toluene, ethylbenzene, and total xylenes(BTEX) <br /> using USEPA Method 8020, for oxygenates tertiary butyl alcohol (TBA), methyl tertiary butyl ether <br /> (MTBE), di-isopropyl ether (DIPS), ethyl tertiary butyl ether (ETBE), and tertiary amyl methyl ether <br /> (TAME), and 1,2-Dichloroethane(1,2-DCA) using USEPA Method 8260 <br /> Current Phase of Project Monitorin <br /> Frequency of Groundwater Sampling MW-1 through MW-8, MW-1 B, MW-1C, <br /> MW-813 and MW-8C= Quarter! <br /> Frequency of Groundwater Monitoring Quarterl <br /> Sample Date November 21, 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 19 19 to 23 69 feet b s <br /> Direction of Groundwater Flow East-Northeast <br /> . Groundwater Gradient 0 008 ft/ft <br /> C\MyDocumentslARC0121681QTRLY1200012168Q400 Delta <br /> 2/22101 <br />