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f ► <br /> r) <br /> Mike Infurna <br /> From: ]anes.Elizabeth@epamail.epa.gov <br /> Sent: Tuesday, May 21, 2002 11:20 AM <br /> To: Margaret Lagorio <br /> Cc: Mike Infurna <br /> Subject: Re: UIC sites <br /> Hi Margaret and Mike: sorry for not getting back to you sooner. <br /> 1. General approach: Each site is unique, depending on soils, depth to <br /> ground water and the types/concentrations of pollultants disposed. <br /> Faster percolating soils may not show any contamination unless it is <br /> recent, so a lot of sampling wouldn't show anything. Use your best <br /> professional judgement, and never fully release environmental liability, <br /> because even the most thorough investigation could miss something. <br /> 2 . Do you need to cc: EPA on correspondence? It would help if you <br /> would cc: us on closure letters, so they can be logged into the <br /> statewide inventory. You don't need to call me ori every one. <br /> 3. Re: dairy/toluene site: I would ask for a sample from biomat/sludge <br /> accumulated in leachlines, in an area before the break. I would also <br /> want to know how the tank refilled - ground water infiltration, rain <br /> water? Which could indicate potential to leak out. If the concentration <br /> was less in refill, how dirty is the sludge? If sludge is clean, and <br /> you are satisfied with the sampling of rinsate to insure no residual <br /> soluble pollutant remains, backfilling tank with a clean solid material <br /> could be acceptable; backfilling with clean local soil and regrading <br /> would improve property value. <br /> 4. Re: Caltrans workplan - it looks acceptable. Again, I would request <br /> a sludge sample from inside one or more of the leachlines, using TCLP to <br /> screen and then more later, depending on what shoved up. The only other <br /> question I would ask is why they are going 40 feet at sampling site B1. <br /> Noticeably absent from workplan was information about the lifetime of <br /> the leachfield and ground water flow direction. <br /> I hope this is helpful. I am going to leave Martha Adams a message that <br /> final approval should come from your agency, not iPA. <br /> FILE COPY <br /> Margaret Lagorio <br /> <mlagorio@sjcehd. To. Elizabeth Janes/R9/USEPA/US@EPA <br /> com> cci Mike Infurna <br /> <minfurna@sjcehd:com> <br /> Subject: UIC sites <br /> 05/15/2002 04 :16 <br /> PM <br /> Liz, <br /> I previously described a site to you that was at i dairy and someone <br /> used a <br /> trailer for drug manufacturing and the septic tank had coleman fuel <br /> disposed <br /> into it. Mike and I have looked at guidelines for UIC program and <br /> 1 <br />