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ui <br /> PUBLIC HEALTH SERVI S FILE <br /> ,oPp �o <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 QtfFOR� <br /> 1 209/468-3420 <br /> A <br /> JAY AND MARY MCILRATH OCT 1 2000 <br /> P O BOX 326 <br /> STOCKTON CA 95201 <br /> RE: Jay's Mini Mart SITE CODE: 1289 <br /> 3302 West Lane <br /> Stockton, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed the environmental investigation report regarding the above referenced site <br /> submitted by John P. Cummings & Associates, dated September 20, 2000. The report <br /> o summarized field work completed during August and September, 2000. The purpose of <br /> the field work was to collect additional soil and groundwater samples to investigate the <br /> possible impact of contaminants to groundwater, including methyl tertiary butyl ether <br /> (MTBE). Concentrations of contaminants detected in the groundwater samples include <br /> total petroleum hydrocarbons as gasoline at 80 micrograms per liter(µg/1), toluene at 1.8 <br /> µg/l, and MTBE at 10 µg/l. <br /> The horizontal and vertical extent of groundwater contamination has not been defined at <br /> the site. Groundwater gradient and direction must be determined, and repeatable <br /> sampling points provided for this site. A minimum of three monitoring wells must be <br /> installed at the site to delineate horizontal and vertical extent of MTBE groundwater <br /> contamination and to determine groundwater gradient arid direction. Submit a work plan <br /> for the installation of the monitoring wells to PHS/EHD by December 1, 2000. <br /> If you have any question regarding the monitoring wells for any other aspect of the <br /> required investigation, please call Dot Lofstrom at (209)!468-3436. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Dot Lofstrom, R.G. <br /> Engineering Geologist <br /> LOP/Site Mitigation Unit <br /> cc: Marty Hartzel, CVRWQCB <br /> John P. Cummings, JPCA(fax) <br /> i <br /> A Division of San Joaquin County Health Care Services <br /> i <br />