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Stantec Consulting Services Inc. <br /> 3017 Kilgore Road Suite 100 <br /> Rancho Cordova CA 95670 <br /> Tel: (916)861-0400 <br /> Fax:(916)861-0430 RECEI <br /> Stantec <br /> APR 2 7 2012 <br /> April 20, 2012 ENVIRONMENTAL HEALTH <br /> Mr. James Barton PERMIT/SERVICES <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 11020 Sun Center Drive, Suite No. 200 <br /> Rancho Cordova, California 95670 <br /> Reference: Quarterly Status Summary Report — First Quarter 2012 <br /> Stockton Charter Way Commingled Plume <br /> 440, 441, 508 West Charter Way and 1444 South Lincoln Street <br /> Stockton, California 95206 <br /> Commingled Plume Account No. CP0057 <br /> Stantec Project No. 211602057.500.0001 <br /> Dear Mr. Barton: <br /> On behalf of Atlantic Richfield Company (ARCO), Chevron Environmental Management <br /> Company (Chevron), Shell Oil Products US (Shell), and Sara Lee Bakery Group, Inc. (Sara <br /> Lee), Stantec has prepared this Quarterly Status Summary Report (QSSR) — First Quarter 2012 <br /> (1Q12) to provide a status update summary for the former ARCO Service Station No. 2168, <br /> Chevron Facility #9-2033, former Texaco (Shell), and former Colombo/Toscana Bakery (Sara <br /> Lee), located at 441 West Charter Way, 508 West Charter Way, 440 West Charter Way, and <br /> 1444 South Lincoln Street, respectively in Stockton, California (collectively referred to as the <br /> Stockton Charter Way Commingled Plume or "Site"). <br /> Site Description <br /> The Site is currently comprised of an active car wash facility (former ARCO Service Station No. <br /> 2168 - located on the northeast corner of the intersection of West Charter Way and Lincoln <br /> Street), an active Chevron-branded gasoline service station (Chevron Facility #9-2033 - located <br /> on the southwest corner of the intersection of West Charter Way and Lincoln Street), an ARCO- <br /> branded gasoline service station [former Texaco (Shell) - located on the southeast corner of the <br /> intersection of West Charter Way and Lincoln Street], and a storage warehouse [former <br /> Colombo/Toscana Bakery (Sara Lee) - located south of the former Texaco (Shell) on the east <br /> side of Lincoln Street]. In April 2010, the California Regional Water Quality Control Board — <br /> Central Valley Region (CRWQCB-CVR) classified the Site as a commingled plume; although a <br /> letter of commitment has not yet been issued by the Commingled Plume Fund, the four parties <br /> are working cooperatively. The Site is comprised of parcels 16503003, 14707607, 16504016, <br /> and 16503005, respectively. The Site lies at an elevation of approximately twelve feet (ft) above <br /> mean sea level on flat terrain. The area surrounding the Site is of mixed residential and <br /> commercial use. <br /> Former ARCO Service Station No. 2168 is currently comprised of an active car wash facility; no <br /> underground storage tanks (USTs) or fuel dispensers are present on the property. Chevron <br /> Facility #9-2033 is currently comprised of a station building, four fuel dispensers on two islands, <br /> and three USTs. Former Colombo/Toscana bakery (Sara Lee) is currently comprised of a <br /> Stockton Charter Way Commingled Plume QSSR 1 Q12.doc 1 <br />