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Date August 9, 2002 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 2130 Address 7906 EI Dorado Street, Stockton, California <br /> ARCO Environmental Engineer Paul Sample <br /> Consulting Co/Contact Person URS Group, Inc 1 Vern Elarth <br /> Consultant Project No U2130-01-4 <br /> Primary Agency/Regulatory ID No Mike Infurna, an Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER(Second 2002) <br /> 1 Groundwater samples were collected from monitoring wells MW-1 through MW-7 Well MW-10 is still <br /> paved over <br /> 2 Groundwater monitoring data was compiled and evaluated <br /> 3 Continued to inject ambient air at low flow rates into selected wells <br /> WORK PROPOSED FOR NEXT QUARTER(Third 2002) <br /> 1 Stratus will continue to perform routine quarterly groundwater monitoring on behalf of ARCO The <br /> next sampling event is tentatively scheduled for September 2002 <br /> 2 Groundwater samples from monitoring wells MW-1 through MW-7 and MW-10 (if accessible) will be <br /> collected and analyzed for total petroleum hydrocarbons as gasoline (TPHG) and for benzene, <br /> toluene, ethylbenzene, and total xylenes (BTEX) using U S Environmental Protection Agency <br /> (USEPA) Method 8015/8020 DHS LUFT, and for methyl tertiary-butyl ether (MTBE), tertiary-butyl- <br /> alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), and tertiary amyl methyl <br /> ether(TAME) using USEPA Method 8260 <br /> 3 Continue air bubbling of ambient air at low flow rates into select wells <br /> 4 If paving work in Hammer Lane is completed, efforts will be made to coordinate with Teichert <br /> Construction to reconstruct the wellhead of MW-10 <br /> P IBp-Arco for URS12130%Quarter[y120021Arco_2130_2Q02 doc <br />