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Case Closure Summary Page 2 <br /> Leak-' 7nderground Fuel Storage Tank 3ram <br /> III. Release and Site Charz,__,,drization Information (continue <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) 260 260 Xylene .036 .036 - <br /> TPH (Diesel) 1, 0 1,000 Ethylbenzene .021 .021 - <br /> Benzene < 5 < 5 Oil & Grease 22,300 22,300 - <br /> Toluene <.0034 <.0034 - Lead 10.3 10.3 - <br /> MineralSpirits 840 840 ` EDB - - - <br /> Comments Soil samples collected on 11-26-85, 6-25-86 and <br /> 11-16-94. No remedial action except the removal of 4 feet of soil at the tank removal on <br /> 6-25-86. Groundwater contamination was not confirmed. See below for other contaminants <br /> detected ` ~ Ga.-PEA. ac D n ---� �ro✓ wa- GQnk a u�T <br /> IV. Closure -- CL"W✓VvatN s AL's ✓Lf�f/ ' <br /> Does completed corrective action protect existing beneficial uses per the Regional Board <br /> Basin Plan? (Yes) No <br /> Does completed corrective action protect potential beneficial uses per the Regional Board <br /> Basin Plan? (Yes) No <br /> Does corrective action protect public hea,1th7for current land use? Yes) No <br /> Site management requirements: Nearest Drinking water well is located approximately 1,200' <br /> west of the site and is owned by Big Wheel Mobile Home Park. jc n MC <br /> Should corrective action be reviewed if land use changes? (Yes) T�aT <br /> Monitoring wells Decommissioned: (Yes) No Number Decommissioned: 1 Number Retained: 0 <br /> List enforcement actions taken: NOR sent 11/9/94 <br /> List enforcement actions rescinded: None <br /> L_ j <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director of PHS/EHD <br /> Signature: Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB Response: None necessary - soil site only <br /> RWQCB Staff Name: G Boggs Title: Program Coord Date: <br /> VII. Additional Comments, Data, etc. <br /> Mark Smolley, Registered Geologist #4650, with EMCON stated that the rp =ed fate and <br /> transport modeling indicated that the compounds in the soil do not present a significant <br /> risk to groundwater at the site. Other contaminants detected wi:lot pIV etroleum hydrocarbons ) <br /> included: 2-chloro-toluene, 4-chloro-toluene, tetrachloroethene (PCE) , trichlorofluoro- <br /> methane, chloroform, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,1,1-trichloroethene <br /> N'%L IVG4 lac tX4.k %t &a `V 1, <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency <br /> as part of the official site file. (08/24/93) <br /> Exhibit N Page 2 of 2 ��vyv<¢, `'t- <br />