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V <br />January 24, 2008 <br />Project: 62400145 <br />Ms. Vicki McCartney, Senior REHS <br />Unit IV - Site Mitigation <br />San Joaquin County Environmental Health Department RECEIVED <br />�� 5(1 �,� <br />600 East Main Street u L fl V ED <br />` Stockton, California 95202-3029 (4N 2 <br />(209)468-3456 2008 <br />ENVIRONMENT HEALTH <br />Subject: Clarifications And Addendum - <br />PERMIT/SERVICES <br />Site Conceptual Model And Work Plan For Remedial Investigation <br />Reference: Facility Site Code: 19093 Y4�/Y ?J <br />Earthgrains Baking Companies, Inc. <br />(Former Rainbo Baking Company) <br />` <br />.2651 South Airport Way <br />Stockton, California 95206 <br />v <br />Dear Ms. McCartney: <br />s. On behalf of Sara Lee Bakery Group, Inc. (Sara Lee), Philip Environmental Services <br />Corporation (PSC) is submitting this Clarification and Addendum to the Site Conceptual <br />Model and Work Plan for Remedial Investigation (Work Plan). The clarification and <br />addendum have been prepared in response to comments and recommendations made by <br />the San Joaquin County Environmental Health Department (EHD) in a letter dated <br />` December 03, 2007 and discussions between EHD, PSC, and their subcontractor ETIC <br />during a telephone conversation on January 10, 2008. To clarify and document the items <br />r discussed in the telephone conversation, PSC has presented the EHD comments and <br />y recommendations in this cover letter in italics with PSC's response following each <br />comment. Proposed changes to the work plan resulting from these recommendations <br />( have been addressed in the attached Site Conceptual Model and Work Plan for Remedial <br />,. Investigation Addendum (Addendum). <br />L, 1. ETIC proposes to advance CPT-4 approximately twelve feet west-northwest of <br />borehole H13; and in addition to collecting grab groundwater samples; ETIC <br />proposes to collect one soil sample at approximately 23 feet bgs to laterally <br />delineate hydrocarbon contamination south of the former gasoline underground <br />storage tank (UST) excavation. Noting that soil samples collected from H13 at <br />five-foot intervals to total depth offifty-five feet bgs were non-detect for chemicals <br />\.. of concern (COC), EHD recommends CPT-4 be relocated just south of the storm <br />1 sewer pipeline and in line with boreholes HIO and H11, the two boreholes where <br />1 COC were detected at high concentrations at 23 feet bgs. <br />PHILIP ENVIRONMENTAL SERVICES CORPORATION <br />210 West Sand Bank Road, Columbia, IL 62236 <br />(618)281-1543 Fax(618)281-7020 <br />