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Case Closure Summary Pages <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) ND xxxx 4.2 <.050 Xylene .019 xxxx .46 <.005 <br /> Benzene .005 xxxx .001 <.005 Ethylbenzene ND xxxx .11 <.005 <br /> Toluene .015 xxxx .28 <.005 MTBE ND xxxx ND <.005 <br /> Lead 12 xxxx xxxx xxxx <br /> Comments:SOIL BEFORE SAMPLES ARE FROM BORINGS DONE ON 815198. WATER BEFORE SAMPLES ARE FROM <br /> BORING GRAB SAMPLES OR FIRST ROUND OF MONITORING WELL SAMPLES (WHICHEVER WERE MOST <br /> CONSERVATIVE). THE SECOND ROUND OF MONITOR WELL SAMPLING EVIDENCED NON DETECTABLE <br /> CONCENTRATIONS OF ALL CONTAMINANTS LISTED ABOVE. NO REMEDIATION OCCURRED AT 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? YES <br /> MonitoringNapor wells decommissioned: 0 Number Decommissioned: 0 Number retained: 3 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: MARGARET LAGORIO, REHS Title: SUPERVISOR, SITE MITIGATION UNIT <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: MARTY HARTZELL Response: <br /> Title: ASSOCIATE ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> WELL SURVEY DATED 9114199 INDICATES NO DRINKING WATER WELLS WITHIN 2,000 FT RADIUS OF SITE; PER <br /> WELL SURVEY REPORT, THE NEAREST WELL IS AN IRRIGATION WELL LOCATED 1,000 FT SOUTH OF SITE, <br /> SEALED TO 50 FT, SCREENED FROM 198 TO 270 FEET BSG. THE PORT OF STOCKTON IS PREDOMINANTLY <br /> INDUSTRIAL. <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 />