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.} rl <br /> Date September 14, 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 Cc/Contact Person Pinnacle/Mark Capps <br /> Consultant Protect No 20805-146 013 <br /> Primary Agency/Regulatory 1D No Ron Rowe, San Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER (Second 1999) <br /> 1 Prepared and submitted quarterly groundwater monitoring report for first quarter 1999 <br /> 2 Performed quarterly groundwater monitoring and sampling for second quarter 1999 Groundwater <br /> samples were collected from monitoring wells MW-1 through MW-7 and submitted for laboratory <br /> analysis <br /> WORK PROPOSED FOR NEXT QUARTER (Third 1999) <br /> 1 Prepare and submit quarterly groundwater monitoring report for second quarter 1999 <br /> 2 Pinnacle will continue to perform quarterly groundwater monitoring for ARCO The next sampling <br /> event is tentatively scheduled for August 1999 Groundwater samples will be collected and analyzed <br /> for total petroleum hydrocarbons as gasoline (fPHG) using U S Environmental Protection Agency <br /> (USEPA) Method 8015, for benzene, toluene, ethylbenzene, and total xylenes (BTEX), and methyl <br /> tert-butyl ether (MTBE) using USEPA Method 8020, and for oxygenates using USEPA Method 8260 <br /> Current Phase of Protect Monitoring <br /> Frequency of Groundwater Sampling MW-1 through MW-7= Quarter) <br /> Frequency of Groundwater Monitoring Quarter) <br /> Sample Date May 25, 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 18 12 to 22 02 <br /> Direction of Groundwater Flow East-Southeast <br /> Groundwater Gradient 0 003 <br /> SVE QUARTERLY OPERATION AND PERFORMANCE <br /> CP\C 1Archrve\Arco121681Qtrly12168Q299 DOC-98b11 T <br />