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APL <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 (pprn) <br /> Before After . Before After Before After Before After <br /> ITPH(Gas) <1 <1 UNK UNK Xylene <.005 <,005 UNK UNK <br /> TPH(Diesel) 817 4.8 UNK UNK Ethylbenzene <.005 <005 UNK UNK <br /> Benzene <.005 <.005 UNK UNK Oil&Grease <25 <25 UNK UNK <br /> Toluene <.005 <.005 UNK UNK Heavy Metals NA NA UNK UNK <br /> MTBE .34 <.005 UNK UNK <br /> Comments: DIESEL CONTAMINATION WAS LIMITED AND MTBE WAS NOT CONFIRMED WITH ADDITIONAL SOIL <br /> BORINGS. POSTAL FACILITY IS ON PUBLIC WATER AND CITY OF STOCKTON WELL SSS-1, LOCATED AT 4728 <br /> QANTAS LANE, IS WITHIN 1000 FEET OF THE SITE. <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? NO <br /> Monitoring/Vapor wells decommissioned: Number Decommissioned: Number retained: <br /> List enforcement actions taken:.t_EVEL 1 <br /> [List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health <br /> Signature: Date: <br /> 3--0 <br /> VI. Central Valley Regional Water Quality Control Board(RB)Notification <br /> Date Submitted to RB:09/28/00 Response Date: 11/03/00 <br /> RB Staff. M. HARTZELL Response: Concurrence <br /> Title:Assoc Eng Geologist <br /> VII. Additional Comments, Data, etc. <br /> SOIL ONLY; DIESEL LOCALIZED, MTBE NOT CONFIRMED <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 />