Laserfiche WebLink
�L Date: August 25,2004 <br /> Quarter: 3rd Quarter,2004 <br /> i <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> i <br /> Facility No.: 548 <br /> Address: 1612 W. dammer Lane, Stockton, CA <br /> ARCO Environmental Engineer: Paul Supple <br /> Consulting Co./Contact Person: URS/Vernon Elarth <br /> Consultant Project No.: 38466395.01_058 <br /> Primary Agency/Regulatory ID No.: Lori Duncan, San Joaquin County Environmental Health <br /> Department <br /> WORK PERFORMED THIS QUARTER (Third 2004): <br /> I <br /> I. Performed quarterly groundwater monitoring and sampling.VW-5S and VW-5D were unable to be sampled due <br /> to insufficient water. <br /> 2. Prepared and submitted quarterly groundwater monitoring report. <br /> 3. Shut down SVE and AS systems. <br /> 4. Submit site conceptual model. <br /> 5. Prepare work plan for additional site assessment,if necessary. <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 /> QUARTERLY RESULTS SUMMARY (Third 2004): <br /> Current Phase of Project: Monitoring <br /> Frequency of Groundwater Sampling: Wells MW-1 through MW-6 and VW-1 through VW-4, <br /> VW-5S, VW-5D, AS-1, AS-2, and AS-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: 7 gallons <br /> Current Remediation Techniques: Natural Attenuation <br /> Approximate Depth to Groundwater: 30.97 to 32.95 feet below ground surface (bgs) <br /> Groundwater Flow and Gradient: Northeast @ 0.005 feet/foot (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 /> L,CS/LCSD results,MS/MSD results,and surrogate recoveries),the data are acceptable as reported by the laboratory <br /> with the following limitations: <br /> • The results for ethanol in samples AS--I, AS-2, and AS-3 may be biased low; the ethanol calibration verification <br /> fell outside contract acceptance limits. <br /> • <br /> KAWP10mm'J5 BP ARC0A005491Qvwtrr1y\3 QTR 04\548 GWMR 3Q04Am Page 1 <br />