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PUBLICIIEALTHSERN ICES //-�o PqU IA( <br /> SAN JOAQUIN COUNTY r ° <br /> Eti'VIRONIVIENTAL HEALTH DIVISION <br /> Ernest %1 Fujimoto. VI D , til P H , Acting Health Officer i 1 <br /> 4-45 \ San Joaquin Street * P O Box 388 • Stockton, Ca 95201-0388 <br /> (209) .468-3420 <br /> MELITTA ELMORE <br /> ENVIRONMENTAL HEALTH AND SAFETY <br /> FOURTH and JACKSON STREET _ <br /> OAKLAND CA 94660 <br />,} RE Safeway <br /> Meat Processing Plant SITE CODE 1 194 <br /> 1111 Navy Drive, Stockton <br />' San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) has <br /> reviewed the third quarter quarterly monitoring report dated August 18 1994 which has been <br />' submitted by ERM-West, Inc for the above referenced site <br /> The site status section of the report states that with the two recent sampling events once a year <br /> sampling for TPH-diesel and measurement of groundwater elevation should be sufficient to <br /> monitor any change in groundwater status The report also states that because detections of diesel <br />' fuel have routinely been below 1000 ug/1, Safeway betieves that no remedial action is warrantee <br /> at this site <br />' The concentration of Total Petroleum Hydrocarbons as Diesel (TPH-d) present in the groundu`ater <br /> beneath this site exceeds the concentration allowed by State Water Resources Control Boara <br /> Resolution Number 92-49 This resolution authorizes the Regional Water Boards to restore the <br />' quality of water, to which waste has been discharged, to background conditions <br /> The March 1, 1994 Appendix B of the Tri-Regional Guidelines for Preliminary Evaluation and <br /> Investigation of Underground Tank Sites prepared by the Central Valley Regional Water Quality <br /> Control Board does allow for residual contamination to be left in place if the contamination poses <br />' no risk or minimal risk to the environment, or removal or treatment of the contamination is not <br /> feasable using current removal or treatment technology <br /> PHS/EHD will accept a feasibility study/risk assessment from Safeway to support Safeway s <br /> conclusion that further remediation of the site is unnecessary <br /> The feasability study/risk assessment shall include data to support an estimation of the lateral <br /> extent of the existing plume The current data suggests that the existing monitoring wells are <br /> within the plume The lateral and vertical extent of the plume must be determined so that a more <br /> accurate estimation of the remaining mass of contamination can be calculated <br />