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Page 1 of 2 <br /> Vicki McCartney [EH] <br /> From: Vicki McCartney [EH] <br /> Sent: Wednesday, September 10, 2014 12:20 PM <br /> To: 'Khandwala, Jatin@Waterboards' <br /> Cc: Nuel Henderson [EH] <br /> Subject: RE: Frontier Transportation -425 Larch, Tracy. (Claim 12886 and Case 2251 <br /> Jatin, <br /> MTBE was detected in the off-site down-gradient well, MW-28, at 22.3 micrograms per liter(ug/L) during the May <br /> 2014 sampling event. This well is over three hundred feet from the source area. High concentrations of MTBE <br /> were detected in wells MW-17, MW-19 and DPE3 during the May 2014 sampling event. Because MTBE <br /> concentrations were reported above 1,000 ug/L in two of these wells and because the plume length that exceeds <br /> water quality objectives is greater than three hundred feet in length, I do not believe that this site meets the Low- <br /> threat Closure Policy Checklist criteria. <br /> I believe that the approach taken by the current consultant is realistically targeting the MTBE plume and I would <br /> like to see MTBE concentrations diminish before this site is moved to closure. <br /> Vicki McCartney, Senior REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton, California 95205 <br /> Phone: (209)468-9852 <br /> Email: vmccartney(@sicehd.com <br /> 0",' . <br /> N �NrifJ2,# <br /> n, <br /> From: Khandwala, Jatin@Waterboards [mailto:Jatin.Khandwala@waterboards.ca.gov] <br /> Sent: Wednesday, September 10, 2014 10:23 AM <br /> To: Vicki McCartney [EH] <br /> Subject: RE: Frontier Transportation - 425 Larch,Tracy. (Claim 12886 and Case 2251 <br /> Vicki,thanks for responding and also looking into this issue of monitoring. Any thoughts about low risk <br /> closure? <br /> Jatin <br /> From: Vicki McCartney [EH] [mailto:vmccartney@sjcehd.com] <br /> Sent: Tuesday, September 09, 2014 4:24 PM <br /> To: Khandwala, Jatin@Waterboards <br /> Cc: Nuel Henderson [EH] <br /> Subject: RE: Frontier Transportation -425 Larch,Tracy. (Claim 12886 and Case 2251 <br /> Jatin, <br /> You are correct. By letter dated 20 March 2014, our agency approved the work plan dated 4 February 2014 <br /> 9/10/2014 <br />