Laserfiche WebLink
Mike Infurna [EH] <br /> From: Jim Barton Obarton@waterboards.ca.gov] <br /> Sent: Thursday, November 17, 2011 2:25 PM <br /> To: Mike Infurna [EH] <br /> Cc: Nuel Henderson [EH] <br /> Subject: Re: Mn sampling at ozone site <br /> Mike, <br /> I'd tell them to restart the ozone sparging system and see what happens while it's <br /> running. Mn should have been decreasing by September 2011 , not increasing if the <br /> ozone was causing it. If it were my case... <br /> Jim <br /> James L.L. Barton, P.G. <br /> Engineering Geologist <br /> California Regional Water Quality Control Board Central Valley Region, 11020 Sun <br /> Center Drive, Suite 200, Rancho Cordova, CA 95670 office (916) 464-4615 <br /> fax (916) 464-4704 <br /> >>> "Mike Infurna [EH]" <Mlnfurna@sjcehd.com> 11/17/2011 2:03 PM >>> <br /> Jim, <br /> Check your memory about a ConocoPhillips/Circle K site in Lathrop at 16470 <br /> Cambridge Drive (CVRWQCB case #391002 and Geotracker ID# T0607700822). <br /> They started injecting ozone August 2010 and then manganese (Mn) started <br /> showing up in gw samples from September 2010. They shutdown the ozone <br /> on June 15, 2011 when Mn actually increasing in most wells, as in NOT attenuating. <br /> There were three Mn sampling events for some wells, two sampling events for other <br /> wells. They were September 28, 2010, March 23, 2011 and Sept 22, 2011 . MW-1 , 2, <br /> 3, & 4 had only two events. The other wells had all three events . <br /> Except for MW-3 and MW-4, the other wells all went up in concentrations. <br />