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PUBLIu HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> a � < <br /> JOGI KHANNA M.D.,M.P.H. <br /> Healch Officer ., <br /> P.O. Box 2009• (.1601 East Hazelton Avenue) • Stockton,California 95201 <br /> 4Ct F OQ�`r <br /> (209)468-3400 <br /> RONALD J THIBAULT <br /> DEL MONTE FOODS APR 0 71992 <br /> P 0 BOX 9004 <br /> WALNUT CREEK CA 94598-2458 <br /> RE: DEL MONTE - DISCO TANK SITE SITE CODE: 2498 <br /> 110 N. FILBERT STREET <br /> STOCKTON, CA <br /> Public Health Services Environmental Health Division (PHS/EHD) <br /> has reviewed both volumes of the "Remedial <br /> Investigation/Feasibility Study" and the "Underground Pipe <br /> Removal and Investigation Results" submitted by your Consultants, <br /> CH2MHILL, and would like to convey the following comments: <br /> 1) The remedial investigation portion of the <br /> submittal has recapped the historical <br /> remedial activities at the time of the tank <br /> removal, established the current soil <br /> contamination conditions near the old tank <br /> pit area, and determined the groundwater <br /> impact to be substantial. <br /> 2) In terms of the feasibility study part of the <br /> submittal, CH2MHILL has offered a multimodal <br /> approach, in which PHS/EHD is optimistically <br /> awaiting evaluation of the "phase one" <br /> interim remedial plan. <br /> 3) PHS/EHD' s only significant concern with <br /> respect to the underground pipe removal is <br /> the one lead level reported as 74 mg/kg <br /> (ppm) . If the original sample is still <br /> available at the lab, it should be further <br /> analyzed to determine the soluble portion <br /> (waste extraction test using deionized <br /> water) ; or reanalyzed to confirm or rebuke <br /> the first reported value; or re-sample that <br /> portion of the stockpiled soil from which the <br /> original sample came; or that portion of the <br /> stockpile could be appropriately handled and <br /> hauled away as hazardous waste. <br /> A Division of San imquin county Health Care 5emees �� <br />