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Raymond Greer -3- September 9, 2010 <br /> Claim No. 8525 <br /> B. In-Situ Soil Remediation: <br /> • METHOD: soil vapor extraction, rebound testing <br /> • DURATION: Sep 05 through Dec 08 <br /> • MASS REMOVED: 16,508 pounds of TPH-G (Q308) <br /> C. Groundwater Remediation: <br /> • METHOD: ozone sparging bench scale test <br /> D. Groundwater Trends: <br /> • Benzene and 1,2 DCA trends are shown below, west of source area (MW-2), <br /> southwest of source area (MW-6), and far south of source area (MW-8). <br /> BENZENE Results for MW2 <br /> 45001 - <br /> -.-_ <br /> 40001 <br /> _- <br /> 3500 '— — — <br /> ' �3000 <br /> 2500 <br /> � 2000 —_•— i - --{_� ___ <br /> ...._ <br /> 000 ___ r <br /> ' soo -- � �, •�' j <br /> 04 <br /> m BENZENE-" <br /> Results for MW6 <br /> 700 1 <br /> ----1' 600 -- i _____ _...__�• _.._ . <br /> 500 0 400 I �Jy..� I I. <br /> � 300 <br /> 200 _----- -- ..w.`-- <br /> .700 <br /> •F 45..*V.IP'�•.51.0.1M.• <br /> Ile <br /> `v.. 1,2•DIEHLOROETHANE �•� BENZENE <br /> California Environmental Protecdon Agency <br /> Qd Recycled Paper <br />