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4 <br /> Bank of Stockton . ,-3- �"� April 20, 2010 <br /> Claim No: 1878 <br /> B. In-Situ Soil Remediation: - <br /> • METHOD: soil vapor extraction pulsing <br /> - <br /> p �P 9 <br /> .• DURATION: 'Feb�05 through present <br /> MASS OF TPH-G'REMOVED: 50 pounds/month C. Groundwater Remediation:. V <br /> R <br /> • METHOD: air sparging, pulsing o _ <br /> • DURATION: Feb 05 through present ti <br /> D. Groundwater Trends: <br /> • Benzene trends are shown below, source area. <br /> BENZENE Re us Its�for <br /> F Y . <br /> f <br /> r 14000 r r p <br /> 4, r r 4 w <br /> 4 <br /> 6000 Lsc _ <br /> < q <br /> 6000 r Yci I .•. t <br /> 2000 ` M <br /> 0 <br /> 51 <br /> l Y <br /> ` j E ., +aYw.twc.fBENZEtVE ti ,W t <br /> a BENZEN?E Results`for MW 8B <br /> 25000 6 f I <br /> - <br />- —__. _ .. ,r 2'*�20000 � r: tt :;Y j � �•� .�... - �_ _ "" <br /> 15000 <br /> I' <br /> V <br /> 5000', <br /> 027 4F., E- <br /> 3 vic BENZENE r{� ZL <br /> w <br /> VII. SENSITIVE RECEPTOR SURVEY: one well identified within Y2 mile of the site <br /> California Environmental Protection Agency <br /> .o <br /> Pia Recyc%d Paper <br />