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Vicki McCartney [EH] <br /> From: Vicki McCartney[EH] <br /> Sent: Tuesday, February 23, 2010 2:06 PM <br /> To: 'Amy Terrell' <br /> Subject: RE: Ripon figures <br /> Hi, Amy. <br /> I checked both well construction diagrams and they are fine. The drillers should use <br /> centralizers when installing the ten-inch diameter conductor casing but that is the only <br /> comment I have. Thank you. <br /> Vicki McCartney, Senior REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> 600 East Main Street <br /> Stockton, California 95202 <br /> Phone: (209) 468-9852 <br /> Fax: (209) 468-3433 <br /> Email: vmccartney@sjcehd.com <br /> -----Original Message----- <br /> From: Amy Terrell [mailto:aterrell@waterboards.ca.gov] <br /> Sent: Tuesday, February 23, 2010 11:45 AM <br /> To: Vicki McCartney [EH] <br /> Subject: Ripon figures <br /> Hi Vicki, <br /> Speaking of the requested diagrams . <br /> They were coming in as we were speaking this morning! <br /> Do these meet your standards? If there is anything that you'd like changed here, I can <br /> call their attention to it. <br /> Amy Terrell <br /> >>> "John Cooper" <jcooper@gercorp.com> 2/23/2010 11:03 AM >>> <br /> Amy, <br /> Here are two well construction diagrams for the deep wells at the Former Ripon Farm <br /> Service facility. One diagram is for the aquifer test/extraction well. That borehole we <br /> will drill using mud rotary. We will set a conductor casing in finer grained material <br /> (estimated at about 135 feet below grade, but will be determined based on the lithology we <br /> encounter as the borehole is advanced) . For the other deep monitoring wells we will use <br /> Sonic drilling techniques. We will not have to set conductor casings using the Sonic rig, <br /> as the drill rod acts as a temporary conductor casing. (We cannot use the Sonic method <br /> for the aquifer test well, because the Sonic drill rod is not large enough to install the <br /> larger diameter well inside of <br /> it. ) <br /> Respectfully submitted, <br /> John <br /> 1 <br />