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California ,egional Water Quality Con._ of Board <br /> Central Valley Region a <br /> Karl E. Longlev,ScD,P.E.,Chair / <br /> Arnold <br /> Linda S.Adams Sacramento Main Office <br /> Sc�rreiut7-,for � Schwarzenegger <br /> I I0-0 Sun Center Drn e#200.Rancho Cordova.California 9.670-6114 Governor <br /> Frtrn-onme"to1 Phone(916)464-3291 •FAX(916)464-464 <br /> ProteclvottRECEIVED <br /> http.%/+v++•++,+vaterboards ca.go+�/central+allec <br /> 12 March 2007 MAR 14 2007 <br /> Sara Lee Bakeries Group, Inc. Mr. Edward Overton-CIC ENGINEERING <br /> 3500 Lacey Rd. 1320 S. Van Buren 9� <br /> Downers Grove, IL 60515 Stockton, CA 95206 <br /> DOCUMENT REVIEW AND WORKPLAN APPROVAL, FORMER COLUMBO/TOSCANA <br /> BAKERIES, 1444 S. LINCOLN STREET, STOCKTON, SAN JOAQUIN COUNTY <br /> (Site, Figure 1) (REGIONAL BOARD CASE # 390825) <br /> 1 reviewed the Quarterly Groundwater Monitoring Report, First Quarter— January 2007 <br /> (Report) and the Soil and Groundwater Investigation Work Plan (Workplan), received <br /> 9 March 2007 from the Sara Lee Bakeries Group, Inc. (Sara Lee) and their consultant, PSC <br /> Environmental Services Inc. (PSE), and sub-consultant ETIC Engineering (ETIC). <br /> The Report provides the results of the quarterly monitoring for your site (Enclosed Figure 4A). <br /> Four monitoring wells (MW-1, MVV-7S, MW-7D, and VE-1) were sampled in <br /> January 2007. ETIC did not analyze the VE-1 groundwater sample-, instead, 0.2 inches of free <br /> phase liquid (FPL) was measured and approximately 500 milliliters of FPL was removed, prior <br /> to inserting an absorbent sock into the well. Maximum groundwater sample analytical results <br /> were: total petroleum hydrocarbons as gasoline, 32,000 micrograms per liter (ug/L); benzene, <br /> 12,000 ug/L; toluene, 420 ug/L; ethylbenzene, 620 ug/L; xylenes, 1,000 ug/L; MtBE, 170 ug/L; <br /> tertiary butyl alcohol, 9.3 ug/L; and 1,2-dichlorethane, 0.52 ug/L. Two additional wells (MW-8 <br /> and MW-14) on your site are owned and sampled quarterly by the adjacent Former Texaco, <br /> 440 W. Charter Way, for their investigation. The Report recommends monthly monitoring of <br /> free phase product and fluid hand bailing/absorbent sock replacement until conditions warrant <br /> resumption of quarterly groundwater monitoring for VE-1. I concur to this recommendation. <br /> In a letter (Letter) from Regional Water Quality Control Board staff (Staff) dated <br /> 8 January 2007, your request for an extension for the due dates of the Workplan and a report <br /> of the investigation were granted. The Letter requested that, pending Staff approval of the <br /> Workplan, the report of the investigation would be due 28 May 2007. The Workplan proposes <br /> the installation of ten direct-push soil and grab groundwater sampling locations (Enclosed <br /> Figure 413). The subsequent report will evaluate the data and propose locations for additional <br /> shallow groundwater monitoring wells in a Workplan Addendum, as needed. <br /> California Environmental Protection Agency <br /> COPY . <br /> rrj Recycled Poper <br />