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Date March 28,2003 <br /> Quarter. 151 Quarter,2003 <br /> • <br /> BP QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 11194 <br /> Address 2375 Tracy Blvd, Tracy, CA <br /> BP Environmental Engineer Scott Hooton <br /> Consulting Co/Contact Person URS/Vernon Elarth <br /> Consultant Project No 38466097 00336 <br /> Primary AgencylRegulatory ID No Harlin Knoll <br /> San Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER (First 2003): <br /> 1 Groundwater samples were collected from monitoring wells AMW-1 through AMW-6, and MW-1 through <br /> MW-8 and were submitted for laboratory analyses <br /> 2 URS compiled and evaluated groundwater monitoring data <br /> WORK PROPOSED FOR NEXT QUARTER (Second 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 (First 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 Quarterly _ <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 7 to 7 6 feet below ground surface <br /> Direction of Groundwater Flow Northwest <br /> Groundwater Gradient 0 01 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 Iimitations <br /> • Elevated reporting limits were due to dilutions performed by the laboratory in order to quantitate a target <br /> analyte,and <br /> • The reported results for total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene,ethylbenzene, total <br /> xylenes (BTEX), and methyl tert-butyl ether (MtBE) in samples MW-6, MW-7, and MW-8 may be biased low <br /> since the analyses for these analytes were performed 11 or 12 days beyond the U S EPA recommended holding <br /> time of 14 days <br /> • <br /> K V5 BP ARMI 1194NQuarterbM QTR 03/11194 QMR 1 Q03 dor. Page 1 <br />