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u <br /> Vicki McCartney [EH] <br /> From: Jim Barton Bbarton@waterboards.ca.gov] <br /> Sent: Monday, June 06, 2011 7:07 AM <br /> To: Vicki McCartney[EH] <br /> Cc: Nuel Henderson [EH] <br /> Subject: Fwd: J&E <br /> Attachments: 2010 SAG_Review_Drft.pdf <br /> 2010 <br /> Review_Drft.pdf(2 <br /> Hi Vicki, ` <br /> f <br /> - it <br /> attached are the. link to the J&E models (see 3 Phase System Models and So Gas Models) � <br /> and the latest version of the DISC draft guidance. Paul verified whathas been said <br /> earlier, that soil data. .is no longer used to directly evaluate il gas n hezJ&E Model <br /> and that aver.aging�BTEX is not acceptable because it lowers the risk from the risk driver i <br /> benzeie Leeaad—is currently 'averaged'in rrisk assessments. Paul said thathe accepts the <br /> 95% if 'there are an adequate number of samplesls tconduct a statistical analysis of the <br /> data. we can discuss the guidance w thhtthe Tgroup during our meeting on Wednesday, if we <br /> have time. Thanks. <br /> Jim Barton <br /> James L.L. Barton, P.G. <br /> Engineering Geologist <br /> California Regional Water Quality Control Board Central Valley Region, 11020 Sun Center <br /> Drive, Suite 200, Rancho Cordova, CA 95670 office (916) 464-4615 <br /> fax (916) 464-4704 - <br /> 7 <br /> k <br /> >>> Paul Sanders 6/6/2011 6:32 AM >>> <br /> http://www.epa.gov/oswer/riskassessment/airmodel/johnson ettinger.htm <br /> i <br /> 1 <br />