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Page 1 of 1 <br /> Vicki McCartney [EH] <br /> From: Vicki McCartney [EH] <br /> Sent: Friday, May 20, 2011 1:36 PM <br /> To: 'Dinesh Rao' <br /> Subject: Addendum to CAP for Frontier Transportation <br /> Dinesh: <br /> I have a question concerning the Addendum to Corrective Action Plan (Addendum), dated 18 April 2011,for the <br /> Frontier Transportation site located at 425 West Larch Road in Tracy, California. In the Addendum, AA&A states <br /> that"Between September 2006 and October 2010, the groundwater level fluctuated between 4.87 feet below <br /> ground surface (bgs)and 7.52 feet bgs in monitoring well MW3R." I checked and the depth to groundwater <br /> (DTW) in MW3R was between 9.5 and 12.15 feet bgs between September 2006 and October 2010. Please <br /> review the groundwater data and let me know whether AA&A still proposes the dual-phase extraction wells to be <br /> screened between 4 and 20 feet bgs. <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: vmccarmev@sjcehd.com <br /> 5/20/2011 <br />