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%also, <br /> r <br /> Case Closure Summary continued <br /> Page 2 Treatment and <br /> Disposal of Affected Material <br /> Material Amount(units) Action(Treatment or Disposal w/Destination) Date <br /> Tank(s) 3 @ 10,000 gallons Disposal: H & H Ship Service Co. , 220 China Basin, SF, CA 2/8/1991 <br /> 4 @ 2,500 gallons 94107 (No manifests available on file) <br /> Disposal Waste Oil: Erickson Inc.,255 Parr Blvd, Richmond CA <br /> 94801 No manifest available on file <br /> Piping 251 pounds Davis Street Transfer Waste Management, Inc, 2615 Davis 9/25/1995 <br /> Street, San Leandro, CA 94577 <br /> Waste Water 52 gallons Romic Environmental Technologies Corp, 2081 Bay Road, East 8/20/1997 <br /> 213 gallons Palo Alto, CA 94303 8/11/1997 <br /> Soil 600 cubic yards Former UST excavation - No manifest 2/91-3/91 <br /> 800 cubic yards From new UST excavation - No manifest 3/91 <br /> 350 cubic yards From former oil UST- No manifest 2/91-3/91 <br /> Groundwater 27,200 gallons Removed during eight weekly GWE events-No manifest 11/16/00-1/2/01 <br /> Barrels 55 gallon drum Ericson. Inc., 255 Parr Blvd., Richmond, CA 94801 9/6/1995 <br /> (Triple Rinse) <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)After Water (ppm) <br /> Before After Before After Before Before After <br /> TPH(Gas) 3500 NA 180 0.26 Xylene 520 NA 0.23 <0.0001 <br /> TPN (Diesel) 29 NA <0.050 NA Ethylbenzene 130 NA 0.030 <0.0005 <br /> TPH (Motor Oil) <5 NA 2.2 NA Lead (Pb) 9.5 NA NA NA <br /> Benzene 3.6 NA 0.35 <0.0005 MTBE 1.7 NA 230 0.120 <br /> Toluene 80 NA 0.0035 <0.0005 1,2 DCA <0.1 NA 0.016 <0.0005 <br /> Comments: Soil Before: TPHg, toluene, ethylbenzene, xylene, TPHmo from 11192 THP15 @ 10feet bsg on 11/10/94. Lead <br /> from SST 3/South @ 13 feet bsg on 2/28/91. TPHd from SST 6/East @ 13 feet bsg on 2/28/91. Benzene from SST 3/North <br /> @ 13 feet bsg on 2/28/91. MTBE and 1,2 DCA from MW-11-14 @ 10 bsg on 8/8/01. No Soil After samples taken. Water <br /> Before: TPHg and MTBE from MW-7 on 7/23/01. Benzene from MW-7 o 4/12/01. Toluene from MW-11 on 2/23/04. <br /> Ethylbenzene from MW-7 on 4/1/94. Xylene from MW-3 on 12/14/01. TPHd and TPH motor oil from THP3W-28 on <br /> 11/10/94. 1,2 DCA from MW-11 on 11/9/01.Water After: TPHg from MW-11 on 1/21/13. Benzene, toluene, ethylbenzene, <br /> xylene and 1,2 DCA from MW-7 on 1/21/13. MTBE from MW-6 on 1/21/13. TPHd, TPHmo and lead not analyzed. NA= Not <br /> 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 Pian?Yes <br /> Does corrective action protect public health for current land use? `fes <br /> Site management requirements: None <br /> Should corrective action be reviewed if land-use changes?Yes <br /> lVionitoring/Remediation Wells Decommissioned?Yes Number Decommissioned: 25 ,'N+umber retained:0 <br /> List enforcement actions taken: NOR 3/30/11, NOR 9/25/14 -- - -- <br /> List enforcement actions rescinded: None--- - - __.--- ---___-- —� <br />