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PUBLIC HEALTH SERVRfES <br /> -G <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISIONC <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 JAN 3 1998 <br /> 2091468-3420 <br /> WT JORDAN SITE Code: 2011 <br /> 1101 HOLLY DR <br /> TRACY, CA 95376 <br /> Re: 298 Grantline Rd. <br /> Tracy, CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed the August 1997 Quarterly Report prepared by Advanced <br /> GeoEnvironmental, Inc. (AGE) for the above referenced site. <br /> Groundwater samples were collected from monitor wells #4, #5, and #6 and the results <br /> indicate groundwater contamination at this site appears to be located predominantly at the <br /> northwestern area of the site. Further sampling and analysis is required by PHS/EHD in <br /> order to determine if this site may be considered for future closure. <br /> Groundwater samples should be collected from all of the monitoring wells next quarter. <br /> The samples must be analyzed for five oxygenates, as well as the constituents currently <br /> being analyzed for (use method 8260 for the oxygenates). <br /> During a site inspection on January 22 1998 it was noted that temperature. electrical <br /> conductivity and PH measurements of the water were not being taken during the well <br /> purging rocedure. Parameter measurements are re uired at the time of sampling <br /> for all monitoring wells. <br /> Please contact Carol Oz, Senior REHS, at (209)468-3440 if you have any questions_ It is <br /> required that you notify PHS/EHD prior to all sampling events so that inspections can be <br /> scheduled. <br /> Donna Heran, Director <br /> Environmental Health Division <br /> Carol Oz, Senior REHS Margaret L gorio, REHS <br /> Site Mitigation Unit Lead Senior <br /> cc: RWQCB, Central Valley Region-Pat Anderson <br /> GeoEnvironmental, Inc.-Bill Little <br /> A Division of San Joaquin County Health Care Services <br />