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Page 2 of 3 <br /> 3- issue the destruction permit. <br /> 4- generate those letters in there sometime too. <br /> 5-eventually issue the installation permit (send that application and $89 fee) <br /> From: Richard Vogl [maiIto:ravgeohydrologic@verizon.net] <br /> Sent: Tuesday, November 06, 2007 12:53 PM <br /> To: Mike Infurna [EH] <br /> Cc: 'Chris Panaitescu'; 'Larry Higinbotham'; 'George Chambers' <br /> Subject: RE: Best California Gas Ltd SS # 172, 7647 Pacific Ave, Stockton,CA 95207 <br /> Mike: <br /> The conductor casings are 12" diameter and they extend to a depth of 20 feet below grade. All three of the <br /> proposed wells to be abandoned have these 12" conductor casings. MW-12, single 2" diameter well was <br /> installed with 8.25" OD auger inside the conductor, MW-11/VW-3 and VW-2-S/VW-2-D were installed with <br /> 10.5" diameter OD auger. There should be no problem drilling out MW-12 and staying on it to total depth <br /> and with the other two wells the 20 feet of conductor casing should guide the auger downward keeping it <br /> straight on the wells as the bit chops them up and the cuttings are sent up the borehole. We will try to get <br /> the two wells to feed into the center of the hollow stem auger as we drill them out to TD if possible, and <br /> then remove the augers with the casing inside after drilling to the TD when the augers are pulled. This may <br /> be possible since the wells appear to have about a two inch gap between them. See attached photo. Our <br /> only other choice would be to pressure grout them in-place and drill out the top 20 feet after grouted. <br /> Please let me know which way you would prefer us to do the abandonment. <br /> I will send you the one page Executive Summary later today or early tomorrow for your review and <br /> comment. <br /> Sincerely, <br /> Richard Vogl, PG, CHG, CEG <br /> Principal Hydrogeologist <br /> GeoHydrologic Consultants, Inc <br /> 5912 Bolsa Avenue, Suite 200 <br /> Huntington Beach, CA 92649 <br /> Phone (714) 898-5727 <br /> Fax (714) 898-5701 <br /> Cell (714) 615-0585 <br /> http://www.�geohydrolog ic.com <br /> From: Mike Infurna [EH] [mai Ito:MInfurna@sjcehd.com] <br /> Sent: Monday, November 05, 2007 4:32 PM <br /> To: ravgeohydrologic@verizon.net <br /> Subject: RE: Best California Gas Ltd SS # 172, 7647 Pacific Ave, Stockton, CA 95207 <br /> 1 haven't has time to review any of this or what was previously sent. <br /> I need to know the following: <br /> -the nested wells, put in with 10" HSA...there are conductor casings for these? steel? I'll need <br /> dimensions. You planning on just putting the HSA inside the cc and drill away? how will you stay on <br /> centered/in the original borehole so you can go to TD on the deep casing with the upper -20 feet casing <br /> bored out? <br /> 11/16/2007 <br />