Laserfiche WebLink
• Date August 23, 2001 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No: 5469 Address: 130 South Wilson Way, Stockton, California <br /> ARCO Environmental Engineer: Paul Supple <br /> Consulting Co./Contact Person: Delta Environmental Consultants, Inc. /Jay R. Johnson _ <br /> Consultant Project No: D000-336 <br /> Primary Agency/Regulatory 1D No: Margaret La orio, San Joa uin County Public Health Services <br /> WORK PERFORMED THIS QUARTER(Second 2001): <br /> 1. Groundwater samples were collected from monitoring wells MW-1 through MW-10 and submitted for <br /> laboratory analysis. <br /> 2. Delta compiled and evaluated groundwater monitoring data. <br /> 3. Delta implemented work activities outlined in the March 19, 2001 work plan. Delta retained <br /> Woodward Drilling Company to drill and install monitoring wells MW-7 through MW-10 on May 30 and <br /> 31',2001. <br /> WORK PROPOSED FOR NEXT QUARTER (Third 2001): <br /> • 1. Delta will continue to perform routine quarterly groundwater monitoring on behalf of ARCO. The next <br /> sampling event is tentatively scheduled for September 2001. <br /> 2. Delta will submit a well installation report presenting the results of activities associated with installing <br /> monitoring wells MW-7 through MW-10. <br /> 3. Groundwater samples will be collected from monitoring wells MW-1 through MW-11 0 and analyzed for <br /> total petroleum hydrocarbons as gasoline (TPHG), benzene, toluene, ethylbenzene, and total xylenes <br /> (BTEX) using USEPA Method 8015/8020 DWS LUFT and for tertiary butyl alcohol (TBA), methyl <br /> tertiary butyl ether (MTBE), di-isopropyl ether (DIPS), ethyl tertiary butyl ether (ETBE), tertiary amyl <br /> methyl ether (TAME), 1,2-Dichloroethane (1,2-DCA), and ethylene dibromide (EDB) using USEPA <br /> Method 8260. <br /> Current Phase of Project: Monitoring <br /> Frequency of Groundwater Sampling: All Monitoring Wells= Quarter) <br /> Frequency of Groundwater Monitoring: _Quarterly- <br /> Sampling Date: May 24,2001 (Wells MW-1 through MW-6) <br /> June 28,2001 Wells MW-7 through MW-10 <br /> Is Free Product(FP) Present on Site: No <br /> FP Recovered This Quarter: NIA <br /> Cumulative FP Recovered to Date: NIA <br /> Approximate Depth to Groundwater: 36.83 to 38.20 feet bgs <br /> Groundwater Flow Direction: East-Northeast <br /> Groundwater Gradient: 0.0022 ft/ft <br /> C:\ARCO\54691Quarterly12001\5469-2Q01Report.doc Delta <br /> 8/23/01 <br />