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Mike Infurna EH <br /> From: Jim Barton [jbarton@waterboards.ca.go ] <br /> Sent: Monday, July 13, 2009 3:00 PM <br /> To: Mike Infurna [EH] <br /> Cc: Nuel.Henderson [EH] <br /> Subject: Re: 1033 W. Charter <br /> Hi Mike , <br /> they need to address how future worker safety (redevelopment) <br /> will be assured if the soil gross contamination is shallow <br /> enough to allow exposure (e . g . . , city building permit would <br /> require removal of soil) . Ask them for an email justification <br /> and we can discuss soil gas on Wednesday after I ' ve reviewed the <br /> case and their justification. Please forward them to me if they <br /> are not in GeoTracker . Thanks . <br /> Jim <br /> James L . L . Barton, P . G. <br /> Engineering Geologist <br /> California Regional Water Quality Control Board Central Valley <br /> Region, 11020 Sun Center Drive, Suite 200 , Rancho Cordova, CA <br /> 95670 office ( 916) 464 -4615 <br /> fax ( 916 ) 4 64 -4 704 <br /> >>> "Mike Infurna [EH] " <MInfurna@sjcehd. com> 7/13/2009 2 : 51 PM <br /> Jim, <br /> this site, "Vanco Truck Plaza" submitted a technical <br /> justification on Geotracker for NOT collecting soil vapor <br /> samples . Instead, they used diesel soil data and conducted an <br /> ESL evaluation . Nuel commented that 5 , 300 mg/kg of TPHd is <br /> roughly one order of magnatude OVER gross contam levels for <br /> "middle distillates" . The site is capped with black top and <br /> concrete and is now, and will be/stay, an active fuel/gas <br /> station in the future . <br /> Margaret asked me to check with you if actual soil vapor samples <br /> must be collected when gross contam and exposure ESLs are <br /> exceeded like this . <br /> GW is non detect and roughly 15- 18 ' bgs . They ' re a suspended C <br /> site and looking for NFA. <br /> you want to discuss it at the meeting or accept the <br /> I <br />