Laserfiche WebLink
Date August I8,2004 <br /> Quarter 3`a Quarter,2004 <br /> • ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 760 <br /> Address 225 South Cherokee Lane, Lodi, CA <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person URS/Vernon Elarth <br /> Consultant Project No 38466403 OL058 <br /> Pnmary Agency/Regulatory ID No San Joaquin County Environmental Health Department <br /> Assembly Bill 681 Status Pro a Owned by Gur reet Dhatt and Kuldeep Dhatt <br /> WORK PERFORMED THIS QUARTER (Third 2004): <br /> 1 Performed quarterly groundwater monitoring and sampling <br /> 2 Prepared and submitted quarterly groundwater monitoring report <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth 2004): <br /> 1 Perform quarterly groundwater monitoring and sampling <br /> 2 Prepare and submit quarterly groundwater monitoring report <br /> 3 Additional site assessment activities <br /> QUARTERLY RESULTS SUMMARY (Third 2004): <br /> Current Phase of Project Monitoring/Assessment <br /> Frequency of Groundwater Sampling MW-1 through MW-3 sampled quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Is Free Product(FP) Present Onsite No <br /> FP Recovered this Quarter None <br /> Cumulative FP Recovered to Date None <br /> Current Remediation Techniques None <br /> Approximate Depth to Groundwater 60 78—61 97 feet below ground surface b s <br /> Groundwater Flow and Gradient Southeast 0 0 003 feet/toot(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 /> o The reported results for 1,2-dichloroethane (1,2-DCA) to samples MW-1 and MW-3 may be biased high as <br /> demonstrated by a high surrogate recovery due to matrix interference <br /> DISCUSSION- <br /> Gasoline range organics (GRO), total xylenes, methyl tert-butyl ether (MtBE), and 1,2-dtchloroethane (1,2-DCA) <br /> were reported above method detection limits in groundwater samples collected from site wells this quarter GRO <br /> concentrations in MW-2 and GRO, total xylenes, and 1,2-DCA concentrations in MW-3 decreased relative to the <br /> (is previous sampling event <br /> K 1Wpr0cessU5 RP ARCOVDWM1QuarterW QTR 044760 GWMR 3Q04 doc Page 1 <br />