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4 Y <br /> Date November 2, 1999 <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 Pinnacle/Mark Capps <br /> Consultant Project No 791696 00010000 <br /> Primary Agency/Regulatory ID No Ron Rowe, San Joaquin Coun Public Health Services <br /> WORK PERFORMED THIS QUARTER (Third 1999) <br /> 1 Prepared and submitted quarterly groundwater monitoring report for second quarter 1999 <br /> 2 Performed quarterly groundwater monitoring and sampling for third quarter 1999 Groundwater <br /> samples were collected from monitoring wells MW-1 through MW-7 and submitted for laboratory <br /> analysis <br /> 3 Submitted workplan for Soil and Water Investigation (September 29, 1999) <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth 1999) <br /> 1 Prepare and submit quarterly groundwater monitoring report for third quarter 1999 <br /> { 2 Pinnacle will continue to perform quarterly groundwater monitoring for ARCO The next sampling <br /> event is tentatively scheduled for November 1999 Groundwater samples will be collected and <br /> analyzed for total petroleum hydrocarbons as gasoline (TPHG) using U S Environmental Protection <br /> Agency (USEPA) Method 8015,for benzene, toluene, ethylbenzene, and total xylenes (BTEX), and <br /> methyl Cert-butyl ether (MTBE) using USEPA Method 8020, and for oxygenates using USEPA <br /> Method 8260 <br /> Current Phase of Project Monitoring <br /> Frequency of Groundwater Sampling MW-1 through MW-7= Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> 'Sample Date _ August 18 1999 <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 26 to 23 09 <br /> Direction of Groundwater Flow East-Southeast <br /> Groundwater Gradient 0 002 ft/ft <br /> CP 1C1ArcluvelArco121681Qtrly1216BQ399 DOC-98Usg 1 �� <br />