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Case Closure Summary Page 2 <br /> Leak-' Underground Fuel Storage Tanki�ogram <br /> 111. Release and Site Char erization Information (continu , <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) 11,000 c 1,4 <br /> .91. .08 Xylene 870 13, ,034 0017 <br /> TPH (Diesel) 2,400 c 1,.:0 1.20 071 Ethylbenzene 140 5.31 ;02.5 .0013 <br /> Benzene 46, 6,. .12 ,017 Oil & Grease 12 unk <br /> Toluene 390 6..5 .24 <.0005 Heavy metals { <br /> tither 2,2,<DC.A .086 .062 Other TCE ; .415 .044 <br /> [CVoy=en,, ts (Depth of Remediation, etc.) : �EXTRACTIM :1:993:,. REDVGED 11,000 PPM 'TPH-G TO a 11.6 PPM.. ;AND BENZENE: FROM. .46PPM - <br /> GTO 6PPM. TPH-G AT 5400PPM AND 670:0PPM WITH BENZENE AT 6.2PPM AND1..3PPM IN TWO .AREAS :TR$ <br /> ROUNDWATER LEVELS AS OF MVLY, .1996 SHOW TPH-G! ONSITE AT '260PP91 BENZENES <0.0 (Ji[W .1)1`HE:. <br /> 0P <br /> OFFSITE, UPGRADIENT MW-S. S.TZLL .RECORDS TPH-t3/D AT 290PPB/62PPB, MTBE ON 91T* AT 30.OPPB XW-1. <br /> (IAND AT 14100B IN MW-5:1AA'.0 140PPB: ON UPGRADIENT VGT SITE. ONSITES: DCA IN WATER .AT 6. PPS IST <br /> -1 TCE IN1.:...1 T- IS. 44. <br /> . 44VP8:. LOWER LEVELS TRICHLOROETHENE AND Taos &OFP'SITB STILL. <br /> IV. Closurei. <br /> Does completed corrective action protect existing beneficial uses per the Regional Sward. <br /> Basin Plan? :NO CORRECTIVE ACTION ,PLAN PROPOSED ; <br /> Does domp'lsted: c6ttiactive. action pr. tact potential beneficial uses ger the Regional: Board <br /> Basin Plan:? n. <br /> /e li <br /> Does corrective action ,protect public health for current land use? n/a <br /> Site management requirements PETROLEUM CONSTITUENTS CONSIDERED To BE NOT AS PROBLEMATIC <br /> AS EXISTING GROUNDWATER SOLVENT PROBLEM.LL SITE IN CVRWQCB,' SOLVENT PLUMS STU.DY;ZODI AREA <br /> Should corrective action. be reviewed if land use changes? ('Yes) <br /> Monitoring wells Decommisioneds (NO) Number -Decommi.sionedi: Number Retained. <br /> List enforcement actions taken: NONE <br /> ij <br /> ?- o <br /> ii <br /> Listenforcementactions rescinded: n/a <br /> j <br /> V. Local Agency Representative Data <br /> Name. DONNA HERAN, REBSAlTithe: DIRECTOR,i}BNVIRONMNNTAL HEALTH DIVISION <br /> Signature: jDate. OCTOBER 25, 1996 <br /> VI RWQCB Noti- kation <br /> Date Submitted to RB: 29 ;SEPT 1996 RB Responses <br /> RWQCB Staff Name. J. BRATHOVDE Title.- Date. <br /> VIZ. Additional Comments, Data, etc. ; <br /> PREVIOUS SED SUPERVISOR, DIANE Hxxs N, IN A MEMO JANUARif 22, 1.996 STATED NO GROUNDWATER <br /> REMEDIATION IS :TO :BE REQUIRED BY ZRD: DUZ TO HIGHER RISZ CONDITIONS OF SOLVENTS :IN THE <br /> GROUNDWATER ALREADY. CONDITIONAL CLOSURE MAY BE ALLOWED1IF NO OBJECTIONS BY LANDOWNER, <br /> D. STAUDENRAUS ARE VOICED. ATTORNZY FOR 'LANDOWNER DOES OBJECT BASED. ON LACK OF INDEMNIFI <br /> k <br /> CATION. OWNER WAS APPRISED OF EXISTING CONTAMINATION AT TIME OF 1992 PURCH&SE, VAPOR EXTR- <br /> ATION PROVED SUCESSFUL POSSIBLE UPGRADIENT OFF-SITE SOURCE STILL EXISTS. NEW RP.,,. TEXACO, I <br /> RELUCTANT TO INTITIATE ANY REMEDIAL ACTIVITY AS REQUIRED BY END C.A3S MGR <br /> This document and the related. CASE CLOSURE LETTER, Shalllibe retained. .by Xead.;agency <br /> as part of the official site file. <br /> Exhibit N Page 2 of 2 <br /> l} <br />