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San Joaquin County DIRECTOR <br /> /QurN <br /> Environmental Health Department Donna Heran, RENS <br /> ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla. REHS <br /> Stockton, California 95202-3029 <br /> PROGRAM COORDINATORS <br /> • �' — Carl Borgman, REHS <br /> F6,01 Website: www.sjgOV.Org/ehdMike Huggins, REHS, RDI <br /> Phone: (209) 468-3420 Margaret Lagorio, REHS <br /> Fax: (209�) 464-0138 Robert McClellon, REHS <br /> 03 JUIy 200$ Jeff Carruesco, REHS, RDI <br /> Swaran Chouhan Kasey Foley, REHS <br /> 1632 Paola PI <br /> Manteca CA 95337-8512 <br /> RE: Super Center Mart <br /> 701 E Charter Way <br /> Stockton, CA <br /> The San Joaquin County Environmental Health Department <br /> and reviewed Interim Remediation Work Plan _ p ment (EHD <br /> June 2008 June 2008 (IRWpas received <br /> GeoEnvironme Prepared d and submitted by your ). dated 20 <br /> (AGEI). Consultant, Advanced <br /> In IRWP, ACEI proposes to install one additional s • <br /> and the trenching and pipin soil vapor extraction (SVE <br /> wells MW-1 MW 2 9 to plumb SVE wells V ) well; <br /> and EW- and MW-3, and groundwater extraction ongh � <br /> 2 into the proposed dual , monitoring <br /> phase extraction (DPE) system. <br /> wells EW-1 <br /> ACEI presented a cost comparison between SVE <br /> Aeration basis, and concluded that PE and DPE systems on an <br /> effective remedial technology f°r Your site. Based on the would be the most cost <br /> tests <br /> be effective on pace available on your site, the previous SVE and GVVE <br /> as necessary Your site and therefore a EHD concurs that DPE <br /> ry and adequate [H&S theref e approves the proposed scope <br /> In the IRWP (c)(3)]. pe of work <br /> ACEI noted that contaminant concentrate <br /> expected in groundwater extracted from <br /> groundwater from g EW-1, hypothesiziong that less ns were o impacted <br /> r than <br /> common) greater depth was g <br /> y encountered at shallow diluting more impacted <br /> investigated, and if found to h as hypothesized, <br /> on groundwater <br /> and reinstalled to focus on Your site. This situation should be <br /> the wells should be abandoned <br /> downward migration of impacted the more impacted groundwater and to <br /> this situation ora pacted groundwater. Present to the prevent <br /> work plan to investigate it by 01 September 008 an <br /> Submit the analysis of <br /> S mit the prop initiate the riate well permit application and fee to the <br /> approved scope of work within 60 da EHD by <br /> days of permit <br /> DPE WP Approval and Directive Letter 0708 <br />