Laserfiche WebLink
s Page ram <br /> Case Closure Summary �yeaking Underground Fuel Storage Tank <br /> i 111 Release and Site Characterization Information (continued) <br /> ter Cleanup (tank removal) <br /> Maximum Documented Contaminant Concentrations -Before and AfWater Water <br /> Contaminant Soil Soil <br /> 1 Soil Water Water Before After Before After <br /> 1 Contaminant Soil Before After (in ppm) <br /> Before After Be(in ppm) (m ppm) <br /> (in ppm) ---- <br /> 40 0.085 MTBE <br /> TPH (Diesel) 1680 61 <0.3 <0.0005 EDB "-'" ""�� <br /> <0.02 0.015 Lead <br /> Benzene NA <0.0005 <br /> Toluene <0.02 NA <0.0005 <br /> Ethylbenzene 0.23 NA . 0.013 <br /> Xylene <br /> 0.65 NA 0.080 <0.0005 <br /> on <br /> in the soil and groundwater. <br /> ely a total <br /> oMultiplef 36 341literstof free prodluct have b enl removed fromdiesel the most contaminated well MW-4 (the only we l with fee product) <br /> concentration of TPH9d in MW 4 has been reduceda bailer and a r. No free to 85 ppb product cord ng t been <br /> last sampling results in Augince ustt 2003,98, and the <br /> Beneficial uses of groundwater are protected, now and in the future. . <br /> 17 at 15' <br /> on <br /> Before <br /> from rMW4 or°10/24/89, Water After rresulon ts9TPHIdf rtomer resultsfrom MW4 on 08S2/03, BTEX 10/18/0017/99 Water Before <br /> 1 <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;i <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 wells decommissioned: no Number Decommissioned: 0 Number.retained: 7 <br /> List enforcement actions taken: NOR sent <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervisor REHS/Site Mitigation/LOP Unit IV <br /> Signature: Date: 2- I I 0 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: James L. Barton Response: <br /> Title:Assoc Eng Geologist <br /> VII. Additional Comments, Data, etc. <br /> Monitoring wells must be destroyed before final closure. <br /> This document and the related CASE CLOSURE LETTER,Shall be retained by the lead agency as part of the <br /> official site file. (08/24/93) Exhibit N Page 2 of 2 <br />