Laserfiche WebLink
lv� <br /> Date: March 28,2003 <br /> Quarter 15` Quarter,2003 <br /> BP QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 11191 <br /> Address 1469 West Hammer Lane, Stockton, CA <br /> BP Environmental Engineer Scott Hooton <br /> Consulting Co/Contact Person URS/Vernon Elarth <br /> Consultant Project No 38466122 00436 <br /> Primary Agency/Regulatory ID No Harlin Knoll <br /> San Joaquin County <br /> WORK PERFORMED THIS QUARTER (First 2003): <br /> 1 Groundwater samples were collected from site monitoring wells MW-I through MW-4 and were submitted for <br /> laboratory analyses <br /> 2 URS compiled and evaluated groundwater monitoring data <br /> 3 URS installed one onsite monitoring well and two off-site monitoring wells <br /> WORK PROPOSED FOR NEXT QUARTER (Second 2003): <br /> 1 Groundwater samples will be collected from site monitoring wells and submitted for laboratory analyses <br /> . 2 URS will compile and evaluate groundwater monitoring data <br /> 3 URS will submit a site investigation report to document the installation of three monitoring wells <br /> QUARTERLY RESULTS SUMMARY (First 2003): <br /> Current Phase of Project Monitoring <br /> Frequency of Groundwater Sampling MW-1 through MW-4 <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 48 03 to 49 77 feet below ground surface _ <br /> Direction of Groundwater Flow South-Southeast <br /> Groundwater Gradient 0 001 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 limitations <br /> • Elevated reporting limits were due to dilutions performed by the laboratory in order to quantitate a target <br /> analyte(s) <br /> • The reported results for(TPHg) total petroleum hydrocarbons as gasoline, benzene, toluene,ethylbenzene,total <br /> xylenes (BTEX), and methyl ter -butyl ether (MtBE) in samples MW-1, MW-2 and MW-4 may be biased low <br /> since the analyses for these analytes were performed 1-3 days beyond the U S EPA recommended holding time <br /> of 14 days <br /> K U5 BP ARCO11119hQuarterlyU QTR 03/11191 QMR 1Q03 duc Page 1 <br />