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UVE.A. <br />-MAY_2 4 2004 - <br />ENVIRONMENT HEALTH= <br />- INDUSTRIAL OUTSOURCING PERMIT/SER%W21,-2004 - <br />cRouP Project'62400145: <br />Ms. Vicki McCartney, REHS <br />San Joaquin County <br />Environmental Health Department <br />304 East Weber. Avenue, Third -Floor <br />Stockton, California 95202-2708 <br />Dear Ms. McCartney - <br />Subject: -Subsurface Investigation Work -Plan =_ <br />The Earthgrains Company Facility <br />2651 South Airport Way - Stockton; California <br />This letter is in response to your April 15, 2004 -correspondence to Sara Lee <br />Bakery Group that provided recommendations to the February 20, 2004 _ <br />Subsurface -Investigation Work Plan (Plan) for the subject facility. Your <br />recommendations are summarized below and are followed with our response: <br />Advancementofone additional boring, B-7, to a depth of approximately 35 feet <br />bgs located adjacent-to.the sump north of the former dispenser to characterize <br />lithology and assess the vertical extent of impacted soil <br />To address your recommendation„ we propose that the location of boring B-3 be <br />adjusted about 10 feet to the west as originally proposed to assess subsurface <br />conditions in this area. It is our opinion_that data from this boring and the riearby <br />B 2 <br />boring - will adequately assess -the magnitude and -extent of impacted soil north `-- <br />of the former USTs. <br />Advancement -of at -least one CPT boring to'a depth of 120 feet using at least <br />one of the proposed boreholes located near the former-USTs-to characterize <br />hydrogeology and lithology. <br />We agree. that one boring should be drivento`a relatively deeper interval in this <br />area to characterize lithology. However, we would= propose- the- depth to be 100 <br />feet rather than the recommended=120 feet because -this shallower depth will be <br />the maximum. interval where we -will proposethe-collection of groundwater <br />samples.(see following item). - -- <br />PHILIP ENVIRONMENTAL SERVICESCORPORATION <br />210-West-Sand Bank' Road, ,P.O. Box 230,. Columbia, IL 62236 <br />(618).281-7173 (800) 733.7173 Fax (618)-281-5120 <br />