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Mike Infurna [EH] <br /> From: Margaret Lagorio [EH] <br /> Sent: Thursday, October 18, 2007 4:55 PM <br /> To: Mike Infurna [EH] <br /> Subject: RE: CMT Well Destruction <br /> Jim clearly has never been to a well destruction by explosion of the casing. Proceed with <br /> your approval unless something else comes up. <br /> -----Original Message----- <br /> From: Mike Infurna [EH] <br /> Sent: Thursday, October 18, 2007 1:48 PM <br /> To: Margaret Lagorio [EH] <br /> Subject: FW: CMT Well Destruction <br /> Margaret, <br /> AGE has submitted a proposal, at EHD's request, for an "alternate" method to destroy the <br /> CMT wells that are not sucessfully destroyed by the "Geoprobe push point/hollow out the <br /> honeycomb" method. <br /> Our Sept 12, 2007 letter to the Bokides stated that drilling out the CMTs would not be an <br /> effective alternative if the primary Geoprobe method did not work. AGE has submitted a <br /> proposal to blow up/wire line explode the casings after they have been filled up with <br /> cement grout. If approved, AGE will submit a full work plan/description of the process. <br /> I'm happy with the proposal and was planning on approving it. Assuming that it works on <br /> the first well they try. If this second/alternative method doesn't work, I was planning to <br /> halt the process before the third well was attempted. This would be a condition of the EHD <br /> approval. <br /> It appears that JLLB has some concerns. . . <br /> Read on. <br /> Comments? <br /> -----Original Message----- <br /> From: Jim Barton [mailto:jbarton@waterboards.ca.gov] <br /> Sent: Thursday, October 18, 2007 1:36 PM <br /> To: tcuellar@advgeoenv.com; Mike Infurna [EH] <br /> Subject: CMT Well Destruction <br /> Hi Mike and Tim, <br /> I reviewed the proposal and spoke with Jim Munch. We concur to the proposal, however, <br /> there are concerns with the grouting. <br /> Primary concern: The grout will need to be in a liquid state, not solidified, when the <br /> charge is detonated, as there will be no way to add additional grout once the well is <br /> destroyed into the subsequently created fractures of a solidified grout. <br /> Less of a concern: Is there any technique to verify that there is adequate penetration <br /> into the formation material by the destruction method; that voids were not left which <br /> could cause cross contamination between zones? That question may require greater minds to <br /> come up with an answer. Or not (there may be no answer) . <br /> Is there any reason to confine the blast to the boring (and avoid a grout geyser) ? Seems <br /> that more energy would be focused back into the well with deeper penetration into the <br /> formation. <br /> How about pressurizing the grout to aid in the penetration? <br /> Any danger of causing an explosion in soil gas in an active gas station? If so, what are <br /> 1 <br />