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r <br />%./ Case Closure Summary %"W <br />Leaking Underground Fuel Storage Tank Program <br />III Release and Site Characterization Information (continued) oacte 2 of 2 <br />Maximum Documented Contaminant Concentrations - - Before and After Cleanup <br />Contaminant <br />Soil <br />(ppm) <br />Water <br />(ppm) <br />Contaminant <br />Soil <br />(ppm) <br />Water <br />(ppm) <br />Before <br />After <br />Before <br />After <br />Before <br />After <br />Before <br />After <br />TPH (Gas) <br />2,300 <br />20 <br />110. <br /><0.05 <br />Ethyl -benzene <br />19 <br /><0.005 <br />.890 <br /><.0005 <br />TPH (Diesel) <br />120 <br /><5.0 <br /><0.05 <br /><0.05 <br />Xylene <br />35 <br /><0.005 <br />1.0 <br /><.0005 <br />Benzene <br />6.8 <br /><0.005 <br />.340 <br /><.0005 <br />MTBE <br />0.095 <br /><0.005 <br /><.001 <br /><.001 <br />Toluene <br /><.3 <br /><0.005 <br />.160 <br /><.0005 <br />1,2 -DCA <br /><0.005 <br /><0.005 <br /><.0005 <br /><.0005 <br />Comments: Soil Before data for TPH gas and BTEX is from MW -2-15' on 11/29/00 and for TPH diesel, MTBE <br />and 1,2 -DCA is from UST -4 on 1115103. This area was over -excavated and resampled on 11/12/03 with non - <br />detect results. Soil After data is from MW -9-15 on 6130105. Water Before data is from MW -2 which was <br />destroyed in October 2003 during over -excavation of contaminated soil. Water After data is from MW -8 on <br />7/21109 except MTBE and 1,2 -DCA are from MW -8 on 12112108. <br />IV. Closure <br />Does completed corrective action protect existing beneficial uses per Regional Board Basin Plan? Yes <br />Does completed corrective action protect potential beneficial uses per 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 />Have the Monitoring/Vapor wells been decommissioned? yes Number Decommissioned: 10 <br />Number retained: 0 <br />List enforcement actions taken: NORs: 6-29-2000 & 10-17-2007 <br />List enforcement actions rescinded: None <br />J. Local Agency Representative Data <br />Name: Donna Heran Title: Director of Environmental Health Department <br />Signature: Date: <br />VI. Central Valley Regional Water Quality Control Board (RB) Notification <br />11 Date Submitted to RB: 22 Oct 2009 Response Date: 03 Dec 2009 <br />RB Staff: James L.L. Barton Response: concurrence to NFA <br />Title: Enctineering Geologist <br />VII. Additional Comments, Data, etc. <br />Wells destroyed March 11, 2010. Report of destruction received April 20, 2010. <br />This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the <br />official site file. <br />Mil <br />