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440 Charter Pagel of2 <br /> ti • <br /> Lori Duncan [EH] <br /> From: Murphy, Mike [mmurphy@cambria-env.com] <br /> Sent: Tuesday, October 31, 2006 2:43 PM <br /> To: Lori Duncan [EH] <br /> Subject: RE: 440 Charter <br /> Lori, <br /> I'll look into this and get back to you ASAP. <br /> Mike <br /> Mike Murphy <br /> Senior Project Scientist <br /> Cambria Environmental Technology, Inc. <br /> 270 Perkins Street, Sonoma, CA 95476 <br /> Phone: 707.933.2367 <br /> FAX: 707.935.6649 <br /> Cell: 510.385.3116 <br /> A Woman-Owned Business <br /> This e-mail may contain confidential and privileged material for the sole use of the intended recipient Any review or distribution by <br /> others is strictly prohibited.If you are not the intended recipient please contact the sender and delete all copies. <br /> From: Lori Duncan [EH] [mailto:lduncan@sjcehd.com] <br /> Sent: Tuesday, October 31, 2006 9:53 AM <br /> To: Murphy, Mike <br /> Subject: 440 Charter <br /> Mike, thanks for returning my call. I decided to respond by email as my question is perhaps a bit convoluted. <br /> There are two multi-chambered wells at this site made of CMT tubing, MW-18-80/MW-18-120 and MW-11- <br /> 80/MW-11-122. Last quarter the depth to water measurements in the MW-11 wells were off approximately 5-6 <br /> feet from all other DTW's in wells with similar screen intervals. Yesterday at the 4th quarter QM I spoke with the <br /> Blaine-Tech guys about how they measure, etc. Yesterday the DTW's in the MW-11 wells were not off from the <br /> rest of the wells, so no telling what happened last quarter. <br /> My question is this: The CMT tubing has seven channels inside of it, each of which can be used as a well. I <br /> seem to recall that when those wells were installed I was told that each depth interval actually had three channels <br /> of the tubing drilled, plugged and screened for use as a well, ie: three 80-foot wells and three 120-foot wells. The <br /> idea behind this was to have one channel open to tag DTW, one channel to keep the dedicated tubing that is <br /> used for purging in, and a spare. Do you know of, or can you find any supporting documentation for this? <br /> checked my field notes in the file and I made no notation of it; I checked the well installation report and <br /> boring/well logs and could find nothing there either. It is entirely possible that I am confusing this site with <br /> another, but I have few of these wells. I do know that these wells were pre-built and delivered to the site in a roll <br /> all ready to be installed, so I was thinking that Cambria may have the exact as-built specifications on an order <br /> form or invoice, perhaps? <br /> The Blaine-Tech guys were not aware of this, they pull the dedicated tubing out of each well,wait for the water to <br /> equilibrate, then tag the depths. I doubt that this had anything to do with the anomalous DTW readings from last <br /> 10/31/2006 <br />