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PS Marina 's 5 -3- February 25 , 2010 <br /> Claim 3668 <br /> A. Soil Excavation : 40 cubic yards of contaminated soil <br /> B. In -Situ Soil/ Groundwater Remediation : ozone injection pilot test has been <br /> approved by LOP . <br /> C . Groundwater Trends : <br /> a MTBE and TBA trends are shown below, source area and down gradient, <br /> respectively . <br /> Results for MW7 <br /> 160000 - 14 <br /> 140000 - <br /> 120000 - - ,, <br /> 100000 <br /> 9 <br /> ... 80000 - zz- <br /> N F <br /> e' 60000 <br /> 40000 <br /> 20000 _ . — _ —_ - . r __ �__ 14 <br /> TERT-BUTYL ALCOHOL (TBA) -..a METHYL-TERT.BUTYL ETHER (MTBE) Depth to Water <br /> Results for MW6 <br /> 7000 0 <br /> 6000 1 - - - - - - - --- -- 2 <br /> 5000 - - [ - ' ---- - I- - <br /> 4 <br /> v i " <br /> 0 4000 <br /> y 3000 <br /> 2000 _ . -. . . ' �, — <br /> 8 <br /> iL <br /> � I <br /> 100010 <br /> 0 - a <br /> . .. TERT BUTYL ALCOHOL (TBA) _ _. METHYL-TERT BUTYL ETHER (MTBE) Depth to Water <br /> VII . SENSITIVE RECEPTOR SURVEY : five wells identified within 1Y2 mile of the site , <br /> including onsite water well <br /> VIII . COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> California En vironmental Protection Agency <br /> Co Recycled Paper <br />