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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 (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) 740 NA 16 0.96 Ethyibenzene 4.2 NA 0.98 0.0007 <br /> TPH(Diesel) 740 NA 12 3.5 Lead 6.5 NA NA NA <br /> Benzene 1.5 NA 4.0 0.0015 Oil &Grease NA NA NA NA <br /> Toluene 1.2 NA 0.021 <0.0005 Mercury 0.027 NA NA NA <br /> Xylene 53 NA 0.29 <0.001 MTBE NA NA 1.56 <0.0005 <br /> 1,2-DCA I NA I NA 1<0.002 1<0.0005 <br /> Comments: <br /> SOIL BEFORE CONCENTRATIONS: TPH (Gas) is from MWA at 15' on 212411992; TPH (diesel) is from <br /> SB-14 at 8' on collected 612512001; benzene, toluene, and xylene are from UST removal sample collect at—2' beneath the <br /> UST on 912611986; ethylbenzerne is from SBA at 15' on 02129196; lead and mercury are from drumed soil cuttings 8:1 on <br /> 0911111998. <br /> SOIL AFTER CONCENTRATIONS: None are available. <br /> WATER BEFORE CONCENTRATIONS: TPH(Gas) is from MWA on 2/25/1992; TPH(diesel) is from MW-2 on 101311997; <br /> benzene and ethylbenzene are from MW-2 on 12/5/1996-, toluene is from MWA on 3/1211999; xylene is from MW-2 on <br /> 711 511 9 94; and MTBE is from MWA on 3/24/2000; 1,2-DCA is from MWA on 8131100. <br /> WATER AFTER CONCENTRATIONS: All results are from MW-2 collected on 71712010. <br /> NA= Not Analyzed <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: Yes Number Decommissioned:11 Number retained:0 <br /> List enforcement actions taken: NOR sent to the RP on 8115189; 1114191; 4117197, 6116100; 07/15/08 <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Linda Turkatte, REHS Title: Director <br /> Signature: 40 GUJL&6� Date: 06/25/2015 <br /> VI. Central Valley Regional Water Quality Control Board RB) Notification <br /> Date Submitted to RB: 2/25/2014 Response Date: 3/27/2014 <br /> RB Staff: James L.L. Barton Response: Concurrence <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br />