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Date November 22, 2000 <br /> WATER <br /> ARCO QUARTERLY GROUND MONITORING REPORT <br /> Facility No 2130 Address 7906 El Dorado Street, Stockton, California <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person Delta Environmental Consultants, Inc 1 Jay R Johnson <br /> Consultant Project No D000-328-1 <br /> Primary Agency/Regulatory ID No Mike Infurna, San Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER (Thirst 2000) <br /> 1 Groundwater samples were collected from monitoring wells MW-1 through MW-7 and MW-10 and <br /> submitted for laboratory analysis <br /> 2 Delta compiled and evaluated groundwater-monitoring data <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth 2000) <br /> 1 Delta will continue to perform routine quarterly groundwater monitoring on behalf of ARCO The next <br /> sampling event is tentatively scheduled for December 2000 Groundwater samples from wells MW-1 <br /> through MW-7 and MW-10 will be collected and analyzed for total petroleum hydrocarbons as <br /> gasoline (TPHG) using U S Environmental Protection Agency (USEPA) Method 8015, for benzene, <br /> toluene, ethylbenzene, and total xylenes (BTEX), and methyl tertiary-butyl ether(MTBE) using USEPA <br /> Method 8020, and for oxygenates tertiary-butyl-alcohol (TBA), MTBE, di-isopropyl ether (DIPE), ethyl <br /> tertiary butyl ether (ETRE), and tertiary amyl methyl ether(TAME) using USEPA Method 8260 <br /> Current Phase of Prosect Monitoring/Remediation <br /> Frequency of Groundwater Sampling All Monitoring Wells= Quarterly <br /> Frequency of Groundwater Monitoring Quarter) <br /> Sampling Date September 28,2000 <br /> Is Free Product(FP) Present on Site No <br /> FP Recovered This Quarter NIA <br /> Cumulative FP Recovered to Date NIA <br /> Current Remediation Techniques SVE/Air Bubbling (SVE system down since <br /> 11/24/97) <br /> Approximate Depth to Groundwater 40 94 to 43 14 ft <br /> Groundwater Flow Direction Northeast <br /> Groundwater Gradient 0 0011 Rift <br /> i <br /> YA V 1L[ON1MyDoc umentsW(ZC0121301QTRLY1200012130Q300 <br /> Delta <br /> 11/22/00 <br />