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I Case Closure Summa <br /> Page�`.2 <br /> Summary <br /> Lea Underground Fuel Storage Teak ogram <br /> i III. Release acid Site Characterization Information (continued) a' <br /> Ft3 ,,n Documented Concentrations Before and Auer Cleanup I <br /> nant Soil (Ppm} Nater (ppm) Contaminant soil <br /> Before After Before After (Ppm) Water (Ppm} <br /> Before After Before After <br /> s) 11,000 < 1.0 .91 .0$ Xylene 8?Q 13. <br /> esel) 2,400 1.Q 1.2!} .0?1 Ethylbenzene 140 S,3 '00 ,0017 <br /> 46; 6. 12 .017 Oil :& Grease �2 unk .029 ,0013 <br /> 39} $. 4 c.4005 Heavy metals <br /> ,2.DCA Q.86 .062 Other TCE .044 <br /> r(De th of ReaWdiation.0' ete.pEXTRACTION, 1993, JeBD 11,000 PPM TPH-G TO < 1.0 PPM., AIM :BENZENE: :FROM 46PPM <br /> FTO 6 PPM. TPH-G AT 5000EPX: AND 570OPPM WITH BENZENE AT 6.2PPM AND 1.3PPM IN TWO AREAS THE } <br /> GROUNDWATER LEVELS AS OF dUtt, 1.996 SHOD TPH-G ONSITE AT 260PPB, BENZENE e0 5F.P8 ..(MW-3)T6 E <br /> HR <br /> OFFSITE, UPGRADIENT Mfi -$ STILL RSC©RDS TPH-G/D AT 290PPBf62PPB. MTBE ON SITEAT 300PPB bW_l <br /> (AND AT 190PPB IN MW 5 AND AT 1.40PPB ON UPGRADIENT UGT SM. ONSITE DCA IN NATER AT 62PPB IN <br /> L -I AND TCE IN M4 2.. I$ 44PI+8.. LOWER LEVELS TRICHLOROETPJM AND TGA ON &OFFSITE STILL.-----j <br /> IV.. Closure 4 <br /> Does completed itdrrective action protect existing beneficial uses per the Regional Board <br /> Basin P1=T NO CORRECTIVE ACTION PLAN PROPOSED <br /> Does completed corr:ectivo per the Regional Boar <br /> action protect Potential benefi"ial uses P <br /> Basin P1an7 n: a d <br /> i� <br /> Does corrective action <br /> probact ..public health for correct Sad use? a/a <br /> Site management:. :requirements: PETROLEUM CONSTITUENTS CON91DIRED TO BE NOT AS .PROBLMATIC <br /> AS EXISTING GROUNDWATER SOLVENT :PROBLEM. SITE IN CVRWQCB SOLVENT PLUME 'STUDY.,.L0DI :AREA <br /> Should corrective action be reviewed if land use changes? jtYes) <br /> Monitoring wells Decommisioned: tNo).. Number 'Decommisioned: Number Reta neds <br /> List enforcement actions taken: NONE <br /> { <br /> List enforcement actions rescinded: n/a <br /> ,i <br /> V. Local Agency Representative Data <br /> Name: DONNA RERAN, RENS Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISION <br /> attire: . <br /> t Date: OCTOBER 1, 1996 <br /> Si <br /> VI,. RWQCB Notification <br /> Date Submitted to RB; 20 SEPT 1996RB Response. <br /> RWQCs Staff Name, J. BRATHOVDE Title: Date; <br /> VII. Additional Comments. Data, etc. <br /> PREVIOUS EHD SUPERVISOR, DIANE HINSON, IN A MEMO JANUARY 22, 1996 STATED NO GROUNDWATER <br /> REMEDIATION IS TO BE RSQQIRED BY EHD DUE TO HIGHER RISK CONDITIONS OF SOLVENTS ;IN THE <br /> GROUNDWATER ALREADY CONDITIONAL CLOSURE MAY BE ALLOWED IF NO OBJECTIONS BY LANDOWNER, <br /> D. STAUDENRAUS ARE VOICED. ATTORNEY FOR LANDOWNER DOES OBJECT BASED ON LACK OF INDEMNIFI- <br /> CATION.. OWNER WAS APPRISED OF EXISTING CONTAMINATION AT TIME OF 1992 PURCHASE. VAPOR ERTR� <br /> ATION PROVED SUCESSBUL. POSSIBLE UPGRADIBNT OFF-SITS SOURCE STILL EXISTS. NEW RP, TEXACO, l <br /> RELUCTANT TO INTITIATE ANY REMSDIAL ACTIVITY AS REQUIRED BY EHD CASE MGR. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency <br /> as parte of the official site file <br /> Exhibit N Page 2 of 2 <br /> �1 <br />