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Page 3 of 4 <br /> Subject: RE: Former Canteen site <br /> looks fine to me too, <br /> once you figure out WHAT you've got and if your system is doing it's job, you can send me your conclusions. <br /> so NO,,,,I DON'T need to pre-approve <br /> From: Eric Muehlberger [mailto:EMuehlberger@deltaenv.com] <br /> Sent:`Monday, April 07, 2008 2:2.5 PM <br /> To: Mike Infurna [EH] <br /> Subject: RE: Former Canteen site <br /> Works for me, My notes are as follows: <br /> Pulse system (we.have been.doing that for quite some time). Monitor to evaluate concentrations. <br /> . Install soil borings to evaluate subsurface. <br /> o Calculate a mass balance of subsurface contaminants. <br /> o Install borings down gradient of MW-11 to evaluate for presence of 1,2-DCA. <br /> Evaluate cross sections, create a fence diagram(possibly), and put in concentration data. <br /> Evaluate concentration versus water level and concentration versus decline overtime. <br /> • Send Mike Infurna an email requesting surrounding landowners (this.has been completed by both of <br /> I guess we are trying to figure out ways to nail..down the subsurface signature and make sure we have a <br /> handle on the mass balance and potential remaining contaminant mass . We.also want to eliminate MW-11 <br />` and it's contaminant as a concern area. <br /> f <br /> Eric W. Muehlberger, PG <br /> Senior Consultant <br /> DELTA CONSULTANTS <br /> DIRECT DIAL: 512.342.9441 <br /> Fa.T Number-: 512.990.7399 <br /> E-mail address: enluehlbergcr@Weltaef y.conz <br /> Toll free: 800.477.74.11 <br /> lvw-w.deltaenv.coin <br /> Member of lnogen <br /> www_inogenet.com <br /> Confidentiality Notice: If you are not the intended recipient of this email,please delete it. Thank you. <br /> From: Mike Infurna [EH] [mailto:MInfurna@sjcehd.com] <br /> Sent: 'Monday, April 07, 2008 4:16 PM <br /> To: Eric Muehlberger <br /> Subject: RE: Former Canteen site <br /> I <br /> hello Eric,. <br /> I checked my notes from our walk/lunch on Nov 29. You guys were to determine if your current rem action <br /> i is at or approaching it's effectiveness limits (asymptotic). IF so and your gw.conc were still too high <br /> (>MCLs), you would need to add/modify/change your rem action so that you can get your levelslconc down <br /> to qualify for No Further Action (NFA) <br /> Do I have this right? <br /> are you at or approaching asymptotic conditions? cost-effectiveness going out of budget? limits of design. <br /> specs/equip at max? <br />} <br /> 5/8/2008 <br /> f !l <br />