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4 0.1 <br />Water Boards <br />RECEVED) <br />MAR 0 7 2018 <br />ENVIRONMENT NEAkitt <br />EDMUND 0 BROWN JR. <br />.10YEANOR <br />M1TTHEN ROORIOUFZ <br />SE3ReTARY FOR <br />,,,4VIROM61fMTA1 PROTE,,ON <br />State Water Resources Control Board <br />UST CASE CLOSURE REVIEW SUMMARY REPORT <br />Aciencv Information <br />Agency Name: Central Valley Regional Water <br />Quality Control Board (Regional <br />Water Board) <br />Address: 11020 Sun Center Drive #200 <br />Rancho Cordova, CA 95670 <br />Agency Caseworker: Vera Fischer Case No.: 390177 <br />Case Information <br />Cleanup Fund (Fund) Claim No.: 14349 GeoTracker Global ID: 10607700124 <br />Site Name: Guardino-Crawford Company Site Address: 517 West Fremont Street <br />Stockton, CA 95203 <br />Responsible Party: Guardino — Crawford, <br />Company <br />Address: 517 West Freemont Street <br />Stockton, CA 95203 <br />Fund Expenditures to Date: $417,498 Number of Years Case Open: 28 <br />Fund Budget Category: CAP/REM <br />To view all public documents for this case available on GeoTracker use the following URL: <br />http://geotrackerwaterboards.ca.qov/map/?qlobal id=T0607700124 <br />Summary <br />The Low-Threat Underground Storage Tank (UST) Case Closure Policy (Policy) contains general <br />and media-specific criteria, and cases that meet those criteria are appropriate for closure pursuant <br />to the Policy. This case does meet all of the required criteria of the Policy. Highlights of the case <br />follow: <br />This case is a former storage facility and is currently an unoccupied lot with two buildings. An <br />unauthorized release was reported in February 1988. One gasoline UST was removed in <br />September 1989. Air sparge/soil vapor extraction (AS/SVE) was conducted from April 2014 to <br />March 2015, which removed 536 pounds of total petroleum hydrocarbons as gasoline (TPHg). The <br />removal rate at shutdown was less than 1.5 pounds per day. Since 1999, eight groundwater <br />monitoring and three remediation wells have been installed and monitored. According to <br />groundwater data, water quality objectives have been achieved or nearly achieved except in the <br />source area. <br />The petroleum release is limited to the soil and shallow groundwater. According to data available <br />in GeoTracker, there are no public water supply wells or surface water bodies within 250 feet of the <br />defined plume boundary. No other water supply wells have been identified within 250 feet of the <br />defined plume boundary in files reviewed. The unauthorized release is located within the service <br />area of a public water system, as defined in the Policy. The affected shallow groundwater is not <br />currently being used as a source of drinking water, and it is highly unlikely that the affected shallow <br />groundwater will be used as a source of drinking water in the foreseeable future. Other designated <br />beneficial uses of the affected shallow groundwater are not threatened, and it is highly unlikely that <br />they will be, considering these factors in the context of the site setting. Remaining petroleum <br />IVItIvItIAIS. CHAIR I THOMAS HOWARD. EXECUTIvE DIREC 7 OR <br />1001 I Street, Sacramento. CA 95814 I Melling Address. P.O Box 100. Sacramento CA 95812 -0100 I www.walerboards ca.gov <br />IttC,LED PAPftr