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Chevron Products -5- May 4, 2009 <br /> Claim No. CP0034 <br /> B. In-Situ Soil Remediation: _ - <br /> • METHOD: soil vapor extraction <br /> • DURATION: (Chevron) Sep 97 through Dec 97 - <br /> (ARCO) Oct 93 through unknown <br /> C. Groundwater Remediation: <br /> - I <br /> METHOD: air sparging <br /> • DURATION: (Chevron) Apr 97 through May 05, <br /> (ARCO) Jan 98 through unknown <br /> D. Groundwater Trends: <br /> MT-BE-a-nd TBA-tr-erads-tor eac-h::s-ite-ar-e-shown below-_. . . - j <br /> Results for MW-2R <br /> 350 - ._. _. _., _._ ..,._,._ _...r _ ._,. _.-. _. 3 <br /> t <br /> 250-- <br /> 0 . <br /> 50 --- --7 <br /> ... — -- — - - 9 <br /> 200 c <br /> 75 <br /> 150 <br /> 3 <br /> 100 <br /> « <br /> O : ti 17 <br /> TERT-BUTYL ALCOHOL,(TBA) u+�,;.ar.:: METHYL-TERT-BUTYL ETHER(MTBE) ;r.Depth,to Waler <br /> { I <br /> Claim CP0034 <br /> ARCO <br /> 3500 <br /> 3000 <br />' 2500 <br /> I , <br /> 2000 �—E-10 <br />! m 1500 <br /> 1000 <br /> 500 <br /> 0 <br /> 00 ) SZ), OR Oh Oh 00 00 <br /> Time <br /> California Environmental Protection Agency <br /> P.a Recyc%d Paper <br />