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�pUlry <br /> f IA <br /> 1 �Y <br /> Z � <br /> Pu LLJ SAN JOAQUIN COUNTY ." <br /> 1 alts bEEi�ct �'o <br /> Ke <br /> AtT <br /> 1601 East Hazelton Avenue) • Stockton,California 9501 <br /> P.O.Box 2009 ( (209) 468-3400 <br /> JAN 18 <br /> S <br /> Kyle Christie <br /> j Arco Products Company <br /> P.O. box 5811 <br /> San Mateo, CA 94402 <br /> RE: Workplans for Excavation IN REPLY REFER TO SITE CODE: <br /> During Tank Replacement at <br /> 1711 Yosemite 1455 <br /> 225 Cherokee 1314 <br /> 800 Kettleman 1349 <br /> We have reviewed the work plans for excavation during tank <br /> replacement for the above referenced addresses. After thorough <br /> evaluation by our staff, Public Health Services, Environmental <br /> Health Division (PHS/EHD) has the following comments and <br /> recommendations: <br /> 1. Upon removal of the underground storage tanks, soil <br /> samples and analysis will be required under the tanks as <br /> per Tri-Regional Board recommendations. (See table #1 <br /> and #2 . ) Additional sampling and analysis will be <br /> required if soil contamination extends beyond the limit <br /> of the tank excavation. <br /> 2 . Soil samples should be analyzed for total lead rather <br /> than organic lead. If the lead level exceeds 5 parts per <br /> million (ppm) a W.E.T (7421) analysis will be required. <br /> 3 . Provide site specific hospital route maps for each health <br /> and safety plan. <br /> 4. Applied GeoSystems has repeatedly used 10 ppm TPH-G and <br /> 1 ppm benzene as an indicator for continuing excavation. <br /> i These levels may exceed maximum allowable levels of <br /> contamination to be left in situ. Soil with these levels <br /> of contamination may require further remediation. <br /> A Division of San Joaquin County Health Care Services <br />