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PUBLIC HEALTH SERVICES oPa� N <br /> SAN JOAQUIN COUNTY —� <br /> 2. 10. <br /> + 2 <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 `'FOR <br /> 209/468-3420 <br /> TOM F MAHER JUL 31 1997 <br /> SHELL OIL PRODUCTS COMPANY <br /> PO BOX 2099 <br /> HOUSTON TX 77252 <br /> RE: Shell Station (former) SITE CODE: 505602 <br /> 1267 Country Club Blvd. <br /> Stockton, CA., 95203 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD), has reviewed the "Site <br /> Investigation Report" dated July 10, 1997, and has the following comments. <br /> Groundwater grab samples from recent onsite push-point activities have indicated that high levels of petroleum <br /> hydrocarbons exists around the area of the underground tanks previously located onsite and at the perimeter of <br /> the property. <br /> In order to verify the groundwater contamination levels and determine the gradient and hydraulic rate at which <br /> the groundwater flows beneath the site, monitoring wells will be required to be installed on and offsite. Offsite <br /> access agreements are required for private properties and City of Stockton Encroachment permits are required <br /> for public right of way access. Separate PHS-EHD boring permit applications and the $89 fee are required for <br /> each parcel where borings are to be placed. <br /> A workplan. including the boring permit applications and access agreements, that proposes multiple well <br /> placement in areas that will aid in determining the lateral and vertical limits of the soil and groundwater plumes <br /> should be submitted to PHS-EHD by October 1, 1997. <br /> Enclosed please find the latest testing and laboratory analyses requirements for gasoline additives/oxygenates <br /> as per the Central Valley Regional Water Quality Control Board. This requirement is to be incorporated in all <br /> soil and groundwater analyses for this site until directed otherwise by PHS-EHD. <br /> You may contact Michael Infurna at(209)468-3454 if you have any questions or wish to discuss the site. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> Michael Infurna Jr., Senior REHS Margaret , REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> MI/ <br /> enclosure <br /> C' Enviros- Diane M Lundquist, PO Box 259, Sonoma, 95476-0259 (w/enclosure) <br /> c: Bank of the West- Penny Jasper, 1450 Treat Blvd., Walnut Creek, 94596 <br /> c: SWRCB - Martin Clark, PO Box 944212, Sacramento, 94244-2120 <br /> c: CVRWQCB - Elizabeth Thayer <br /> A Division of San foaauin Countv Health Care Services <br />