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k <br /> PUBLIC HtALTH S <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 �ikoa <br /> 2091468-3420 FILE C 02 Y <br /> PORT OF STOCKTON . <br /> JAY JAHANGARI OCT 0 7 1999 <br /> PO BOX 2089 <br /> STOCKTON CA 95201 <br /> RE: PORT OF STOCKTON Site Code: 1282124 <br /> SITE 3, PORT RD 13114 AND G <br /> STOCKTON CA 95201 <br /> San Joaquin County Public Health Services Environmental Health Division(PHS/EHD) <br /> has reviewed the Additional Subsurface Site Investigation for Petroleum Hydrocarbons <br /> Report dated September 14, 1999 prepared by Philip P. Ross, RG, for the above <br /> referenced site. PHS/EHD agrees with the Report's recommendations to continue <br /> quarterly sampling of the groundwater at this site. <br /> Continue quarterly monitoring for Benzene, Toluene, Xylene, Ethylbenzene using EPA <br /> method 8020, Total Petroleum Hydrocarbons as gasoline using EPA Method 8015m, and <br /> Methyl tertiary butyl ether using EPA Method 8260 until otherwise directed by <br /> PHSIEHD. If analytical results of water samples collected from on-site MWs continue to <br /> reflect a decline in concentration an attenuating contaminant balance may be <br /> demonstrated. Upon confirmation that the contaminant plume size is decreasing a <br /> Closure Report for this site will be requested. This report should include all data <br /> supporting the conclusions stated in the above referenced Report, including calculations <br /> for the mass balance of contaminants remaining at this site. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Carol Oz, Senior REHS Margaret agorio, REHS <br /> Site Mitigation Unit IV Supervisor <br /> cc: Mark List-CVRWQCB <br /> Philip Ross, RG <br /> i <br /> A Division of San Joaquin County Health Care Services <br />