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!y <br /> Case Closure Summary.Page 2 <br /> Leaking Underground.Fuel Storage Tank Program <br /> III. Release and Site Characterization. Information.(continued) <br /> Maximum.Documented Contaminant Concentrations ,-.Before and.After.Cleanup. <br /> Contaminant Soil Before (ppm) Water (ppm) Cor taminant Soil Before (ppm) Water (ppm) <br /> After Before After After Before After <br /> TPH (Gas) 480 <1.0 56.0 0.06 Xyli nes 26.0 1.3 4.0 X0.0006 <br /> TPH (Diesel) 140 37.0 ND NA Eth elbenzene 9.2 0.67 2.4 X0.0003 <br /> Benzene 1.0 X0.5 3.7 X0.0003 Oil Grease ND NA 0.0021 NA <br /> Toluene 3.0 X0.5 1.2 X0.0003 He vy Metals NA 5.6 NA NA <br /> MTl 3E 2.3 ¢1 3.4 0.0012 <br /> Comments: SOIL AND WATER'BEFORE'.RESULTS FROM ENV( ON MENTAL-ASSESSMENT BORINGS ON 9116198. <br /> SOIL `AFTER'.RESULTS FROM EXCAVATION.SIDEWALL SAMPLES, WATER`AFTER'.RESULTS.FROM.MOST <br /> CURRENT MONITORING WELL WATER.SAMPLES._No SFBRW CB Environmental Screening Levels were exceeded... <br /> Compliance with the Public Participation requirements in.Section 2728 of the California Code of.Regulations has been met. <br /> IV.. Closure. <br /> Does completed corrective action.protect existing beneficial uses per the.Regional.Board Basin.Plan?YES <br /> Does completed corrective action.protect potential beneficial uses per the.Regional Board Basin Plan?..YES. <br /> Does corrective action.protect public health.for current land use? YES <br /> Site management requirements:.NONE <br /> Should corrective action be reviewed if land use changes?YES <br /> Monitoring/Vapor wells.decommissioned:.NO ... ..... Number Decommissioned:-0 . .......Number retained:.6 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local.Agency.Representative Data <br /> Name:.MARGARET LAGORIO, REHS Title:.SUPERVISOR,.SITE MITIGATION UNIT <br /> Signature: Date: <br /> VI.. Central Valley Regional Water Quality Control Board (RB)Notification <br /> Date Submitted to RB:. R sponse Date:.. <br /> RB Staff: JAMES.L.L. BARTON. Response: <br /> Title: .. . .ENGINEERING.GEOLOGIST. <br /> VII.. Additional.Comments,.Data, etc. <br /> Site is an operating ranch. Former tank pit location is an open area next to currently operating above ground.tanks. There. <br /> were no reported.detections of ethylene dibromide or 1,2-DCA in either soil or groundwater. <br /> This document and the related CASE CLOSURE LETTER,Shall ke retained by the lead agency as part of the official <br /> site file. <br />