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c Case Closure Summary Page 2 <br /> Leakirr"' 'derground Fuel Storage Tank <br /> ISI. Release and Site Chara�zation Information (continued*.,_) <br /> C <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup 1 <br /> Contaminant Soil (ppm) Water (ppm) Contaminant soil (pPxt►) Water (ppm) <br /> Before After Before After Before After Before After <br />( TPH (Gas) 57 <57 <.05 Xylene 15; <l5 ¢.0015 <br /> 'TPH (Diesel) N/A - Ethylbenzene 2.1 <2.1 <.0005 I <br /> Benzene 4.4 X0.4 <.0005 Oil & Grease N/A _ <br /> - - <br /> Toluene 1.2 <1.2 <.000S Heavy <br /> EDB1sPb .14 0.14ND <br /> a <br /> Other N/A - - _ ND ND <br /> Comments (Depth of Remediation, etc.) <br /> SOIL CONTAMINATION DOCUMENTED AT TIME OF TANK 'REMOVAL. TWO (2) SOIL BORINGS PERFORMED, <br /> SOIL BELOW DETECTION LIMITS. ONE HYDROPUNCH (WATER SAMPLE) COLLECTED IN B-1 WHICH WAS <br /> ALSO 'BELOW DETECTION LIMITS <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board <br /> Basin Plan? (Yes) No I <br /> Does completed corrective action protect potential beneficial uses per the Regional, Board <br /> Basin Plan? (Yes) No <br /> Does corrective action protect public health for current land use? (Yes) No <br /> Site management requirements: <br /> Should corrective action be reviewed if land use changes? (Yea) No <br /> Monitoring wells Decomm;isioned Yes No Number Decommisioned:N/A Number Retained:N/A <br /> List enforcement actions taken LEVEL ONE, NOTICE OF REIMBURSEMENT SENT TO REGIONAL BOARD. <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN Title3DIRECTOR- OF ENVIRONMENTAL HEALTH <br /> Signature: ~~ ✓ + Dater ��r- <br /> VI. RWQCH Notification <br /> Date Submitted to RBs RB Response. <br /> RWQCB Staff Name:S THAYBR Title:ASSOC. ENGINEER Date:- <br /> VII. Additional Comments, Data, etc. <br /> -SOIL ONLY- <br /> . <br /> i <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency � <br /> as part of the official site file. (08/24/93) <br /> 1 <br /> Exhibit N Page 2 of 2 j <br />