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Date September 23,2003 <br /> Quarter 3rd Quarter,2003 <br /> BP QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 11194 <br /> Address 2375 Tracy Blvd, Tracy, CA <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person URS/Vernon Elarth <br /> Consultant Project No 38466252 OL058 <br /> Primary Agency/Regulatory ID No Harlin Knoll <br /> San Joaquin County Environmental Health Department <br /> Assembly Bill 681 Status Property owned by Conoco Phillips <br /> WORK PERFORMED THIS QUARTER (Third 2003): <br /> 1 Groundwater samples were collected from monitoring wells AMW-1 through AMW-6, and MW-1 through <br /> MW-8 and were subrmtted for laboratory analyses AMW-3 was inaccessible and unable to be sampled or <br /> monitored <br /> 2 URS compiled and evaluated groundwater monitoring data <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth 2003) <br /> 1 Groundwater samples will be collected from monitoring wells AMW-1 through AMW-6, and MW-1 through <br /> MW-8 and submitted for laboratory analyses <br /> 2 URS will compile and evaluate groundwater monitoring data <br /> QUARTERLY RESULTS SUMMARY (Third 2003): <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 Quarter) <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 5 13 to 7 12 feet below ground surface <br /> Direction of Groundwater Flow North-Northwest <br /> Groundwater Gradient 0 006 feet/foot <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 limitations <br /> • The reported results for total petroleum hydrocarbons as gasoline (TPHg) in samples AMW-5 and AMW-6 are <br /> due to a discrete peak in the C5-C6 range <br /> • Elevated reporting limits were due to dilutions performed by the laboratory in order to quantitate a target <br /> • analyte(s) <br /> K\WprocessU5 BP ARCOU I IMQumicrbA3 QTR 03\1 1194 GWMR 3Q03 doc Page 1 <br />