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Page 1 of 2 <br /> Vicki McCartney [EH] <br /> From: Vicki McCartney [EH] <br /> Sent: Wednesday, May 14, 2008 2:10 PM <br /> To: 'Kirk Larson' <br /> Cc: Nuel Henderson [EH] <br /> Subject: RE: Site Reviews <br /> Kirk: <br /> The site at 15 Grant Line Road, Tracy, has an MTBE plume that is not defined to the west and north of the <br /> source area. The most current report for first quarter 2008 indicates that the most impacted monitoring well, <br /> MW-5, has an MTBE concentration of 97 ug/L. Additional investigation is needed to define the plume. (During a <br /> site investigation in December 2004, the consulting firm handling this site was denied access to advance one <br /> CPT boring on the adjacent property to the north of this site.) <br /> The site at 3400 Newton Road, Stockton, had MTBE reported in monitoring well MW-1 at concentrations as high <br /> as 630 ug/L in June of 2007. This well is screened between 44 and 64 feet below surface grade (bsg) and <br /> depth-to-groundwater measurements are currently at approximately sixty-two feet bsg. As a result, MW-1 can <br /> not be sampled each quarter. There is one domestic well onsite and a number of domestic wells nearby. Our <br /> department has just approved the installation of four monitoring wells, three wells screened between 55 and 70 <br /> feet bsg, and one well screened between 60 and 70 feet bsg. Our department has also approved a forty-eight- <br /> hour groundwater extraction pilot test. <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 /> From: Kirk Larson [mailto:KTLarson@waterboards.ca.gov] <br /> Sent: Wednesday, May 14, 2008 12:52 PM <br /> To: Vicki McCartney [EH] <br /> Cc: Margaret Lagorio [EH] <br /> Subject: Site Reviews <br /> Good afternoon Vicki: <br /> I am conducting Five Year Reviews of the following site for the Cleanup Fund. In your opinion, briefly, <br /> what is the status of these investigations/ cleanups? Thanks, KTL <br /> 15 Grant Road E,Tracy <br /> 3400 Newton Road, Stockton <br /> Kirk T. Larson, P.G. <br /> Five Year Review Unit <br /> Division of Financial Assistance <br /> 5/14/2008 <br />