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Vicki McCartney [EH] <br /> To: Jim Barton <br /> Subject: RE: TO methods question <br /> Attachments: Soil gas data by TO methods.pdf <br /> Soil gas data by TO <br /> methods.pd... <br /> Jim: <br /> Attached please find the laboratory analytical data and associated chain-of-custody for <br /> soil gas samples that were reportedly analyzed by methods T03 and TO15. <br /> 2 contacted Jennifer Miller, the technical sales representative at Air Toxics, by e-mail <br /> and asked for clarification. I will forward Jennifer's response to you. <br /> Vicki McCartney, Senior REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> 600 East Main Street <br /> Stockton, California 95202 <br /> Phone: (209) 468-9852 <br /> Fax: (209) 468-3433 <br /> Email: vmccartney@sjcehd.com <br /> -----original Message----- <br /> From: Jim Barton (mailto:jbarton@waterboards.ca.gov] <br /> Sent: Thursday, June 25, 2009 6:16 AM <br /> To: Leticia Valadez <br /> Subject: TO methods question <br /> Hi Leticia, <br /> the following question came up during my meeting with San Joaquin County yesterday. <br /> A report of a soil gas investigation for potential vapor intrusion at a USTs site <br /> referenced TO methods (TO-3 and TO-15) . The lab data showed MS/MSD using water units <br /> (ug/L) . The staff person did not contact the lab due to previous experience with a lack <br /> of response to questions; however, they did contact Air Toxics lab. Air Toxics' chemist <br /> said the other lab is misrepresenting the method as TO, since it ran a modified water <br /> method (8260B or 8015) . <br /> Please confirm this response or add additional clarification on the use of water methods <br /> for MS/MSD in TO methods, since the County wants to know if this question is adequate <br /> justification for rejecting the report in GeoTracker. <br /> Thanks. <br /> Jim <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 /> 1 <br />