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PUBLIC FrEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION . ` <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> ALEX PEREZ SEP 2 2 1997, <br /> SHELL OIL PRODUCTS COMPANY <br /> PO BOX 4023 <br /> CONCORD CA 94524 <br /> RE: Shell Station WIC# 204-7524-1806 SITE CODE: 506171 <br /> 2494 E. Fremont St. <br /> Stockton, CA., 95205 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) <br /> has reviewed the work plan recently submitted by Enviros, Inc., and has the following <br /> comments. <br /> In correspondence from PHS-EHD dated July 11, 1997, you were directed to submit a <br /> complete work plan and well survey for this site by August 31, 1997. The work plan <br /> received September 9, 1997 is incomplete and as of this date, the well survey has not <br /> been received. <br /> The complete work plan was to propose a soil and groundwater investigation that would <br /> delineate the lateral and vertical limits of the soil and any groundwater plume at the site. <br /> Details in the work plan inferred that groundwater samples may not be collected ("Soil <br /> and groundwater samples - if collected"). <br /> PHS-EHD hereby clarifies the original directive. A complete work plan, including the <br /> collection of adequate numbers of groundwater samples, is to be submitted to PHS- <br /> EHD by September 30, 1997. The report of findings is to be submitted to PHS-EHD by <br /> December 1, 1997. <br /> A recent revision to the Central Valley Regional Water Quality Control Board's July 17, <br /> 1997 memo is now suggesting that EPA Method 8260 for oxygenates (copy enclosed) <br /> may be modified based on product usage at the site. Please modify your laboratory <br /> analyses to comply with the suggestions in the revised memo. <br /> PHS-EHD is requiring underground tank sites investigating releases to establish the <br /> deepest known depth to water during the site's operation. Information being received <br /> by other UGT sites indicate that releases during deep/drought conditions is causing <br /> petroleum contamination deep in the saturated zone to leach into the groundwater and <br /> A Division of San Joaquin County Health Care Services <br />