Laserfiche WebLink
t <br /> 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) 2,250 1,075 4.8 .149 Ethylbenzene 1.2 32.1 .139 <.0005 <br /> TPH (Diesel) Xylene 44.9 197.8 .0007 <.001 <br /> ,Benzene 5.9 1.7 1.3 <.0005 MTBE .077 .026 <br /> Toluene 14.3 46.7 .001 <.0005 <br /> Comments: Soil Before data is from soil beneath the USTs at the time of removal on 12/27/91. Soil After data is from the <br /> west sidewall sample at 20 feet following over-excavation of contaminated soil March thru May 1993. Water Before data for <br /> TPH—g and BTEX is from MW2 on 6/20/97 and for MTBE is from MW 107 on 3/15/01. Water After data for TPH—g and <br /> BTEX is from MW 106 on 11/14/08 and for MTBE is from MW 109 on 8/13/09. <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: No Number Decommissioned: 0 Number retained: 19 <br /> List enforcement actions taken: NOR(Morita), NOR(Hussain) <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio, REHS Title: 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: James L.L. Barton Response: <br /> Title: Associate Engineering Geologist <br /> VII. Additional Comments, Data, etc. <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 />