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• <br />nce <br />- "ase Closure Summa --v Page 2 _ <br />RWQCB Staff Name: Title: Assoc Eng <br />T- Brathoyde <br />TSI. Release <br />Leaki iderground <br />and Site Chara'tjm�rization Information <br />Fuel Storage <br />Tank 7 -a. <br />(continue6 <br />.r <br />Maxam m+ Documented <br />Contaminant <br />Concentrations <br />--Before <br />and After Cleanum <br />!Soil <br />Before <br />(pp=)I <br />After <br />Water (ppm) <br />Before After <br />Contaminant <br />Contaminant <br />Soil (ppm) <br />Water (ppm) <br />Before After <br />Before After <br /><.005 <br />11,000 <br /><.005 <br /><5.0 <br />1.2 <br /><5.0 <br />TPH (Gas) <br />TPH (Diesel) <br />Xylene <br />3.1 <br />.0016 <br />Benzene <br />.05 <br />.0007 <br /><.0005 <br /><.0005 <br />Ethylbenzene <br />Oil & Grease <br />.76 <br />NA <br />1 <br />_0005 FOOOS <br />Toluene <br />other <br />.0034 <br />.0005 <br /><.0005 <br />Heavy metals <br />NA <br />- <br />Other <br />�, <br />Comments (Depth of Remediation, etc.): <br />NO ACTIVE REMEDIATION PROPOSED OR CONDUCTED AT SITE. NO CONFIRMATION SOIL BORINGS DONE <br />AT PREVZOUS SOIL AREAS WHERE TPH-D CONTA MgX=ON DETECTED. LATERAL AND VERTICAL SOIL <br />ZERO LONE 0 LIbQTED DEPTHS ONLY.CONSULTANT GAMES GW/TPHD IMT MW -3 •ANOMALOUS" AND MAYBE <br />ONLY CONCERN. MW -3 TPHD HITS <100 UG/L AND NO PATTERN TO RISING OR FALLING DTW LEVELS. _JJ <br />IV. Closure <br />Does completed corrective action protect existing beneficial uses per the Regional Board <br />Basin Plan? Yes <br />Does completed corrective action protect potential beneficial uses per the Regional Board <br />Basin Plan? Yes <br />Does corrective action protect public health for c,.L=ent land use? Yes <br />Site management requirements: NONE NOW. <br />Should corrective action be reviewed if land use changes? Yes <br />Monitoring wells Decommi.sioned: ye8 !Number Deco—I sioned:g Number Retained:0 <br />List enforcement actions taken: NOR,OCT 29, 1991 <br />List enforcement actions rescinded: NONE <br />V. Local Agency Representative Data <br />Name:DONNA '/ MARGA�j RSOTitle: DIRECTOR PHS -MM/ LOP SUPERVISOR <br />Signature- Data: <br />V2. ;kWQCB Notification <br />Dat�-3-Submitted to RB: RB Response: <br />nce <br />with No Further Action <br />RWQCB Staff Name: Title: Assoc Eng <br />T- Brathoyde <br />Geo I Date: <br />-5 <br />-7 <br />VII. Additional Comments, Data, etc. <br />LATEST MW INSTALLATION, 2&W-4, =NS't'LLED 8/26/96,OF7-SIT$ TO THE WEST DSD NOT DETECT ANY <br />SOIL OR GROUNDWATER CONTAMINATION. THIS INVESTGATION COMPLETED CONFIRMED NO OFF-SITE <br />=ACT AND DELMMAT D GW PLUME. NO RECEPTORS WITHIN 20001. NO LAND USE CHANGE PROPOSED. <br />MW -3 CLOSEST TO HOTTEST TPHD RESIDUAL SOIL AND NOT ACTED SINCE JOIE 1996, AND SEP 95. <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 />Exhibit N Page 2 of 2 <br />