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NS Marina ' s 5 - 3- March 2 , 2009 <br /> u Claim 3668 <br /> FP Free phase product in site wells <br /> V. FREE PRODUCT : none identified <br /> VI . SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation : 40 cubic yards of contaminated soil <br /> B . In -Situ Soil/ Groundwater Remediation : ozone injection bench test has been <br /> approved by LOP . <br /> C . Groundwater Trends : <br /> • MTBE and TBA trends are shown below: <br /> Results for MW7 <br /> 160000 _ q <br /> 140000 <br /> 120000 - --- <br /> 100000 - - t ` <br /> U' - g w <br /> 80000 - - - - -- - <br /> 60000 _ <br /> 40000 _.. _ - ____ _•- _ <br /> 20000 - -_ - _ ._ . 14 <br /> �0 <br /> P C� <br /> r-+ •T$ TERT BUTVL ALCOHOL (TBA) NETHYL_TERT BUTYL ETHER (WBEDepN to Wate <br /> VII . SENSITIVE RECEPTOR SURVEY: five wells identified within Y2 mile of the site , <br /> including onsite water well <br /> VIII . COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description : active retail gasoline station <br /> B . Site History: the extent of groundwater contamination is defined <br /> C . Groundwater Monitoring Summary: strong monitoring history <br /> D . Remediation Summary: ozone injection bench test is pending <br /> E . Contaminant Exposure Pathway Evaluation : unknown <br /> Caliior-nia Envlronmental Protection Agency <br /> a s Recy4ed Paper <br />