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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 Before (ppm) Water (ppm) Contaminant Soil Before (ppm) Water (ppm) <br /> After Before After After Before After <br /> TPH (Gas) 22,000 2.7 0.070 Xylene 2100 0.31 <0.0005 <br /> TPH (Diesel) NA NA NA Ethylbenzene 290 0.027 <0.0005 <br /> Benzene 17.6 0.0016 <0.0005 Oil& Grease NA NA NA <br /> Toluene 1,292.20 0.085 <0.0005 Heavy Metals PB 11.1 NA NA <br /> MTBE <33.3 0.005 <0.0005 <br /> 1,2 DCA 0.064 0.026 11 <br /> Comments: Soil Before Concentrations: TPH (Gas), Xylene,and Ethylbenzene are from VW4 at 30 feet on 4/6/2007,- <br /> Benzene, Toluene, and Lead are from UST3 removal 11/3/1986;and MTBE is from BP- SB1-25.5' on 6/18/1998. <br /> Soil After Concentrations: none are available. Water Before Concentrations: TPH (Gas), Benzene, Toluene, Ethylbenzene, <br /> Xylene, and 1,2 DCA are from CPT1-W90 collected on 3/29/2004; MTBE is from MW-1 collected on 6/25/1999. <br /> Water After Concentrations:TPH (Gas), Benzene, Toluene, Ethylbenzene, Xylene, MTBE, and 1,2,DCA are from MW1 <br /> collected 4/3/2009. <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 /> F <br /> management requirements: None <br /> ould corrective action be reviewed if land use changes? Yes <br /> nitoring/Remediation Wells Decommissioned? No Number Decommissioned:0 Number retained: 9 <br /> List enforcement actions taken: NOR sent to RP on 2/17/1998 <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Adrienne Ellsaesser, REHS Title: Acting Program Coordinator <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: J. Barton Response: <br /> Title: Eng- Geologist <br /> VII. Additional Comments, Data, etc. <br /> The Site has a Cal Code Water Well on the parcel that has not been impacted based on prior sampling that has been <br /> conducted. <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead anennv az mart of fhn nffi-ioi ;f- f;i- <br />