Laserfiche WebLink
f <br /> iT <br /> i Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations - - Before and After Cleanup <br /> Contaminant Soil Before (ppm) Water: (ppm) Contaminant Soil Before (ppm) Water (ppm) <br /> After Before- After After Before After <br /> TPH (Gas) 370 <1.0 NA NA Xylenes -2.4 0,018 NA NA <br /> TPH (Diesel) NA 16 Ethylbenzene 0.9' <0.005 <br /> Benzene <0.05 <0.005 Oil&Grease NA NA <br /> Toluene 5.9 <0.005 Heavy Metals -<0.005 NA <br /> t , <br /> MTBE <0.01 <0.005 <br /> Comments:-SOIL BEFORE' DATA IS.FROMBENEATHTHE PIPING AT 2 FEET BELOW GRADE ON 12123198. SOIL <br /> 'AFTER' SAMPLES WERE COLLECTED FROM SOIL BORINGS INSTALLED ON OCTOBER 28, 2008. NO <br /> GROUNDWATER SAMPLES HAVE BEEN COLLECTED; DEPTH TO WATER IN THE AREA IS APPROXIMATELY 70-80 <br /> FEET BELOW SURFACE GRADE. k <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?YES <br /> r. <br /> sem: <br /> Does completed corrective action prot 6t potential beneficial uses per the Regional Board Basin Plan? YES <br /> Does corrective action protect public health for current:and use? YES <br /> Site management requirements: NONE <br /> Should corrective action be reviewed if land uses changes?YES <br /> MonitoringlVapor wells decommissioned: 0 Number Decommissioned:. 0 Number retained: 0 <br /> List enforcement actions taken:s NOR <br /> l � <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN _ Title: DIRECTOR of ENVIRONMENTAL HEALTH <br /> Signature ' a Date: <br /> s2-�23� <br /> VI. Central Valley Regional Water,.puality Control Board.(RB) Notification <br /> Ayk <br /> F <br /> te Submitted to RB: 219109 4Response Date: 2118109 <br /> �Staff: JAMES L.L. BARTON, PG Response: Concurrence <br /> e: ENGINEERING GEOLOGIST',i . <br /> VII. Additional Comments, Data, etc. <br /> The site is an operating airport, with no plans to;change site usage in the future. Soil sample results from the Geoprobe <br /> soil borings installed on October 28, 2008 Oass-the SFBRWQCB Environmental Screening Levels. <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 />