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L.. Case Closure Summary
<br /> Leaking Underground Fuel Storage Tank Program
<br /> Page 2
<br /> III. Treatment and Disposal of Affected Material continued
<br /> Material Amount(Units) Action(Treatm e nt or Disposal w/Destination) Date
<br /> Tank(s) One 5,000 gallon Erickson Inc.255 Parr Blvd., Richmond, CA 94801-Manifest not signed 04/05/1990
<br /> Two 10,000 gallon Erickson Inc.255 Parr Blvd., Richmond, CA 94801-Manifest not signed 04/05/1990
<br /> One 1,000 gallon Erickson Inc.255 Parr Blvd., Richmond, CA 94801-Manifest not signed 04/05/1990
<br /> Three 10,000 gallon Ecology Control Industries 255 Parr Blvd., Richmond, CA 94801 02/25/2003
<br /> One 1,000 gallon Ecology Control Industries 255 Parr Blvd., Richmond, CA 94801 02/25/2003
<br /> Product Piping 20 yards Ecology Control Industries 255 Parr Blvd., Richmond, CA 94801 02/26/2003
<br /> Water/Oil 1,850 gallons rinsate Gibson Oil&Refinery, Commercial Dr., Bakersfield, CA 93308— 04/04/1990
<br /> Manifest not signed
<br /> 1,300 gallons Romic Chemical Corporation, 2081 Bay Road, East Palo Alto, CA 02/20/2003
<br /> Soil
<br /> Gasoline Dispensers
<br /> III. Release and Site Characterization Information
<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) 15,000 NA 420 19 Xylenes 1,200 NA 34 1.5
<br /> TPH (Diesel) 220 NA 240 9.3 MTBE <0.005 NA 1.8 <0.005
<br /> TPH (Motor Oil) <10 NA 71 1.7 1,2-DCA <0.005 NA 0.96 <0.0005
<br /> Benzene 160 NA 36 0.65 EDB <0.005 NA 0.43 <0.0005
<br /> Toluene 740 NA 61 0.41 Lead 120 NA NA NA
<br /> Ethylbenzene 220 NA 7 10.96
<br /> Comments: The `Soil Before' concentrations for TPH (gas), benzene, toluene, ethylbenzene and total xylenes are from
<br /> sample SB-4 @ 43 feet on 05/13/94, TPH (diesel) from CPT-9 @ 60 feet on 12/14/10, TPH (motor oil) from MW-15D @ 50
<br /> feet on 04/01/04, MTBE, 1,2-DCA and EDB from HP-4 @ 74 feet on 09/07/00, and lead from soil stockpile SP 1A-D on
<br /> 09/11/00. `Soil After' concentrations were not collected. The `Groundwater Before' concentrations for TPH (gas) are
<br /> from HP-4,58' on 09/07100, TPH (diesel)from MW-9 on 01/30/02, TPH (motor oil) from MW-9A on 10/27/02, benzene,
<br /> toluene, ethylbenzene and total xylenes from MW-9S on 10/02/01, MTBE from MW-9 on 11/24/97, and 1,2-DCA and EDB
<br /> from MW-9 on 03/12/02. The `Groundwater After' concentrations for TPN (gas), TPH (diesel), TPH (motor oil), benzene,
<br /> toluene, ethylbenzene, total xylenes and MTBE are from MW-15D on 08/10/12, 1,2-DCA from MW-15D on 08/01/07, and
<br /> EDB from MW-15D on 08/23/06. 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: 13 Number retained: 12
<br /> List enforcement actions taken: NOR on 04/20/90, 01/14/91, 09/08/92, 09/09/99
<br /> List enforcement actions rescinded: None
<br /> V. Local Agency Representative Data
<br /> Name: Adrienne Ellsaesser, REHS Title: Program Coordinator
<br /> Signature: � � Date: ��fi6
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