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PUBLIC HEALTH SERVIC ES <br /> SAN JOAQUIN COUNTY <br /> Q: <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer Cq, a�P <br /> pR <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 6J I30 COPY <br /> KAREN PETRYNA <br /> EQUIVA SERVICES LLC JUN 19 2001 <br /> P O BOX 7869 <br /> BURBANK CA 91510-7869 <br /> RE: Shell and Texaco Sites in San Joaquin County Local Oversight Program <br /> This letter is a summary of the recent meeting held between various staff members of San <br /> Joaquin County Public Health Services, Environmental Health Division (PHS/EHD), <br /> Equiva Services LLC (Equiva), and Cambria Environmental Services (Cambria). In <br /> attendance were Margaret Lagorrio, supervisor of PHS/EHD, Dot Lofstrom, Registered <br /> Geologist for PHS/EHD, and Lori Duncan, Mike Infurna, Harlan Knoll, and Jeffrey <br /> Wong, Senior Registered Environmental Health Specialists for PHS/EHD. Also present <br /> were Karen Petryna, Civil and Environmental Engineer for Equiva and Joe Neely and <br /> Aubrey Cool, project manager and project geologist for Cambria. <br /> The meeting began with a general discussion regarding US Environmental Protection <br /> Agency method 8260. Shell stated that they have a contract to use Kiff Laboratory as of <br /> May 2001 and that all future oxygenate analysis will be completed using method 8260. <br /> The discussion then proceeded to specific Shell sites. The following is a brief summary <br /> of each site as it was discussed. <br /> 880 Victor <br /> Jeff Wong issued the workplan approval in August 2000 but it was apparently never <br /> mailed. Methyl tertiary butyl ether (MtBE) concentrations in groundwater have increased <br /> up to 14,000 micrograms per liter(µg/1) since the workplan was first submitted. If the <br /> workplan still seems appropriate, Mr. Wong will send out a workplan approval. <br /> Action item: Jeff Wong to evaluate workplan and send response. <br /> 4315 Waterloo Road <br /> Jeff Wong received analytical data that indicate weathered gasoline. The vertical extent <br /> of contamination remains undefined at this site. Concentrations of MtBE have increased <br /> from 20 µg/1 to 150 µg/1. Additional groundwater investigation is required at this site. <br /> The vertical investigation needs to extend down to the historic low depth of 90 feet below <br /> ground surface (bgs). <br /> Action item: Jeff Wong to send letter to Shell directing them to install additional wells <br /> and determine vertical extent of contamination. <br /> 1313 Charter <br /> This site is progressing satisfactorily. A drilling permit was issued June 18, 2001 and the <br /> fieldwork is scheduled f0Ar J1UV11Xon of San Joaquin County Health Care Services <br />