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E� <br /> .J <br /> Treatment and Disposal of Affected Material <br /> Material Amount(Units) Action(Treatment or Disposal w/Destination) Date <br /> Tank(s) 4 tanks (29,500 lbs) Erickson, Inc., 255 Parr Blvd., Richmond, CA 94801 12/10/1998 <br /> 4 tanks(5000 lbs) Erickson, Inc., 255 Parr Blvd., Richmond, CA 94801 12/28/1998 and <br /> Manifests unsigned by facility operator 1/5/1999 <br /> Piping Reportedly 6000 linear Erickson, Inc., 255 Parr Blvd., Richmond, CA 94801 12/28/1998 <br /> feet Manifest unsigned by receiving facility operator <br /> Free Product 350 gallons oil/water Demenno Kerdoon 12/28/1998 <br /> 2000 N. Alameda St., Compton, CA 90222 <br /> Manifest unsigned by receiving facility operator <br /> Soil 521.25 tons Forward Landfill 8/3/1999 <br /> 9999 S. Austin Road, Manteca, CA 95336 <br /> Manifests unsigned by receiving facility operator <br /> Water/oil 2000 gallons Demenno Kerdoon 121??/1998 <br /> 2000 N. Alameda St., Compton, CA 90222 (day not <br /> Manifest unsigned by receiving facili operator 1 legible) <br /> III. Release and Site Characterization Information continued <br /> Maximum Documented Contaminant Concentrations (ppm)-- Before and After Cleanup <br /> Contaminant Soil Soil After Water Water Contaminant Soil Before Soil After Water Water <br /> Before Before After Before After <br /> TPH (Gas) 3,800 NA 86 1.7 Xnts 300 NA 25 0.250 <br /> TPH(Diesel) 4,100 NA 1,400 2 IrITBIr 4.5 NA 24 0.500 <br /> Benzene 24 NA 1.6 0.120 TBA 6.8 NA 1 0.140 <br /> Toluene 75 NA 6.9 0.013 Load 13 NA 0.021 NA <br /> Ethylbenzene 75 NA 4.2 0.058 <br /> Comments: Soil Before—TPHg and benzene from PP-7-4'(4/25/2000), toluene, ethylbenzene and xylenes from PP-14-12' <br /> (412512000); MTBE and TBA from stockpile sample SP2-4^&B(12911999); TPHd from SP1-5A&B. (1/2911999); lead from <br /> stockpile sample SP-2-1 (1212111998). Soil After data not collected, therefore Not Analyzed. <br /> Water Before—MTBE from TP-W1 (9211011998), TPHd, TPHg, benzene, toluene, ethylbenzene and xylenes from MW-7 <br /> (911112001); lead from MW-3 (511112000), TBA from MW-4 (10128/2004). <br /> Water After—highest concentrations of each COC detected last monitoring event on 712712011: TPHg, TPHd, <br /> ethylbenzene, toluene, total xylenes from MW-7; TBA from MWFP-1; MTBE and benzene from MW-3. <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: 27 Number retained: 0 <br /> List enforcement actions taken: NOR issued 04/12/1999 <br /> List enforcement actions rescinded: None <br /> Page 2 <br />