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PUBLIC H15ALTH SERVICES <br /> SAN JOAQUIN COUNTY a <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> °�iFoaa <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> JUL 0 2 2001 <br /> KAREN PETRYNA <br /> EQUIVA SERVICES LLC <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 Joaquin <br /> County Public Health Services, Environmental Health Division (PHS/EHD), Equiva Services <br /> LLC (Equiva), and Cambria Environmental Services (Cambria). In attendance were Margaret <br /> Lagorio, supervisor of PHS/EHD, Dot Lofstrom, Registered Geologist for PHS/EHD, and Lori <br /> Duncan,Mike Infurna,Harlan Knoll, and Jeffrey Wong, Senior Registered Environmental Health <br /> Specialists for PHS/EHD. Also present were Karen Petryna, Civil and Environmental Engineer <br /> for Equiva and Joe Neely and Aubrey Cool, project manager and project geologist for Cambria, <br /> respectively. <br /> The meeting began with a general discussion regarding US Environmental Protection Agency <br /> method 8260. Shell stated that they have a contract in place with Kiff Laboratory as of May 2001 <br /> and that all future oxygenate analysis will be conducted using method 8260. The discussion then <br /> proceeded to specific Shell sites. The following is a brief summary of each site as it was <br /> discussed. <br /> 880 Victor <br /> Jeff Wong approved the workplan for this site in August 2000 but it was apparently never mailed. <br /> Methyl tertiary butyl ether(MtBE)concentrations in groundwater have increased up to 14,000 <br /> micrograms per liter(µg/1) since the workplan was first submitted. If the workplan still seems <br /> 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 of <br /> contamination remains undefined at this site. Concentrations of MtBE have increased from 20 <br /> µg/1 to 150 µg/1. Additional groundwater investigation is required at this site. The vertical <br /> investigation needs to extend down to the historic low depth of 90 feet below ground surface <br /> (bgs)• <br /> Action item: Jeff Wong to send letter to Shell directing them to install additional wells and <br /> 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 for July. <br /> A Division of San Joaquin County Health Care Services <br />