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Date- January 21,2003 <br /> Quarter. 4'"Quarter, 2002 <br /> BP QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 11194 <br /> Address 2375 Tracy Blvd, Tracy, CA <br /> BP Environmental Engineer Scott Hooton T <br /> Consulting Co/Contact Person URS/Vernon Elarth <br /> Consultant Project No 38466016 00336 <br /> Primary Agency/Regulatory ID No Harlin Knoll <br /> San Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER (Fourth 2002): <br /> 1 Groundwater samples were collected from monitoring wells AMW-1 through AMW-6, and MW-1 through <br /> MW-8 and were subirutted for laboratory analyses <br /> 2 URS compiled and evaluated groundwater monitoring data <br /> WORK PROPOSED FOR NEXT QUARTER (First 2003): <br /> 1 Groundwater samples will be collected from monitoring wells AMW-1 through AMW-6, and MW-1 through <br /> MW-8 and subnutted for laboratory analyses <br /> 2 URS will compile and evaluate groundwater monitoring data <br /> QUARTERLY RESULTS SUMMARY (Fourth 2002): <br /> Current Phase of Project Monitoring <br /> Frequency of Groundwater Sampling AMW-1 through AMW-6, MW-1 through MW-8 Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Sample Date 10/31/02 <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 4 4 to 7 0 feet below ground surface <br /> Direction of Groundwater Flow Northwest <br /> Groundwater Gradient 0 006 ft/ft <br /> ANALYTICAL DATA REVIEW: <br /> Based on the review of the analytical and hardcopy data (chain-of-custody records, blanks, dilutions, holding times, <br /> LCS/LCSD results,MS/MSD results, and surrogate recoveries),the data are acceptable as reported by the laboratory <br /> with the following]nutations <br /> • Total petroleum hydrocarbons as gasoline (TPHg) results for samples MW-5 and MW-6 are confirmed as <br /> gasoline, <br /> • TPHg results for sample MW-7 are due to a discrete peak at C6 and C7, <br /> • Elevated reporting limits were due to dilutions performed by the laboratory in order to quantitate a target <br /> analyte, and <br /> K US BP ARC0\1I1941Qusver1y\4-QTR Ml 1194 QMR4QO2&c Page 1 <br />