Laserfiche WebLink
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) 3040 3040 120 1 .2 Xylene 213 213 15 0.004 <br /> TPH (Diesel) NA NA NA NA Ethylbenzene 57.1 57. 1 4.3 0.001 <br /> Benzene 47.5 47.5 23 0.016 Oil & Grease NA NA NA NA <br /> Toluene 135 135 18 <0.0005 Heavy Metals NA NA NA NA <br /> MTBE <0. 100 <0.100 <1 0.004 <br /> Comments: The soil before and the soil after concentrations are from soil boring BH-1A at 50 feet bsg. The before and after <br /> ground water samples are from MW-2 (historically the MW with the highest contaminant concentrations). MW-2 has also <br /> contained concentrations as high as: 28ug/L TBA and 3ug/L 1 ,2-DCA. <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/Vaporwells Decommissioned : No Number Decommissioned : 0 Number retained : 10 <br /> List enforcement actions taken: NOR sent to RPs <br /> List enforcement actions rescinded : None <br /> V. Local Agency Representative Data <br /> Name: Adrienne Ellsaesser Title: RENS, Acting Program Coordinator <br /> Signature: �e / t� 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 /> UST piping was removed and replaced in 1993 which generated approximately 80 cubic yards of soil for disposal . The <br /> USTs and piping were removed in 1999 which generated approximately 40 cubic yards of affected soil for disposal . <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 /> �I <br /> I� <br /> I <br />