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PUBLI( HEALTH SEAgCES 4�ANtN_• <br /> ��ro <br /> SAN JOAQUIN COUNTY ' <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer .•. :;a <br /> /Ad <br /> 304 East Weber Avenue,Third Floor • Stockton, CA 95202 <br /> � <br /> 209/468-3420 SEP 2 6 2001 <br /> GENE GABBARD JIM & SHEYLA CREEL <br /> P O BOX 1260 12511 MUNDY <br /> STOCKTON CA 95212 LODI CA 95240 <br /> RE: Gene Gabbard, Inc. <br /> 640 N. EI Dorado <br /> Stockton CA 95202 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD)has reviewed <br /> the Quarterly Groundwater Monitoring Report, 2nd Quarter 2001 dated August 7, 2001 that was <br /> prepared by Ground Zero Analysis, Inc. and has the following comments. <br /> There are currently four shallow groundwater monitoring wells at this site. The report documents the <br /> routine quarterly groundwater monitoring and sampling of those wells that took place on June 28, <br /> 2001. This was the second such event that has occurred at this site. Monitoring well MW-3,which is <br /> located in the area of the former underground storage tank, reportedly had approximately four inches <br /> of floating free product in it; therefore a groundwater sample was not collected. A sample of the <br /> product was collected and identified as being primarily in the motor oil range, but laboratory data <br /> sheets supporting this statement were not included with the report. <br /> Laboratory analysis of the groundwater samples collected from monitoring wells MW-1, MW-2 and <br /> MW-4 were non-detect for petroleum hydrocarbon constituents and oxygenated fuel additives, but <br /> positive for tetrachloroethene. Additionally, MW-1 and MW-2 had detections of chloroform. These <br /> analytical results are consistent with results from the prior event. <br /> It was recommended in the report that periodic removal of the floating free product from MW-3 should <br /> be initiated. PHS/EHD agrees with this recommendation. The thickness of the product should be <br /> checked and the product then removed by bailing on a daily basis until a recharge rate is established. <br /> Once this is complete, a routine schedule for bailing the product out of the well can be established. <br /> You may also wish to consider an interim remediation method, such as vacuum extraction. <br /> As previously directed, routine quarterly monitoring of the site must continue until further notice by <br /> PHS/EHD. Please inform PHS/EHD of the schedule for monitoring and removing the floating free <br /> product in MW-3. This work should begin as soon as possible. If you have any questions please call <br /> Lori Duncan at(209)468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Leri Cit lr, Aaf <br /> Lori Duncan, Senior REHS Dot Lofstrom R.G. <br /> LOP/Site Mitigation Unit IV Engineering Geologist <br /> cc: Marty Hartzell, CVRWQCB <br /> John Lane, Ground Zero <br /> A Division of San Joaquin County Health Care Service <br />