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Page 1 of 1 <br /> ..I <br /> r <br /> Mike Infurna [EH] <br /> From: Mike Infurna [EH] <br /> Sent: Tuesday, January 29, 2008 3:33 PM <br /> To: 'rvogl@geohydrologic.com' <br /> Subject: Thrifty Oil #172 Stockton WP + permit <br /> Attachments: 7647 Pac MW11-12 VW3 rplc WP aprvl 1-2008 scanned_.pdf; 7647 Pac SR053251 JAN08 <br /> Scanned_.pdf <br /> Richard, <br /> attached is the work plan stamped approval for MW-12 (single) and MW-11/VW-3 (nested) replacement wells for <br /> the Stockton Thrifty site on Pacific ave. <br /> note the conditions. <br /> In case you can't read them: <br /> 1- use cement grout (as opposed to the 'bentonite grout' in the work plan), <br /> 2- MW-11/VW-3, the nested well, is to have centralizers that provides no less than (NLT) 2" grout <br /> annulus/clearance. <br /> 3- MW-11/VW-3 and MW-12 are 'replacement' wells required by and for LOP. Other soil borings are for UST <br /> removal requirements, not required by LOP. <br /> notice the EHD only enforces the "GROUT"annulus of 2" minimum...althought I RECOMMEND you centralize the <br /> whole lenght of the VW from the deeper MW, you are only required to centralize in the area above the <br /> bentonite/transition seal IN the actual grout seal. How good can a VW be if it is jammed against another PVC <br /> casing when NO sand can get in????without centralizers, this may happen where the two casings share the <br /> hole. <br /> Call me and confirm the drill date please. <br /> Michael J. Infurna Jr. <br /> Senior REHS. <br /> LOP/ Site Mitigation Unit IV <br /> San Joaquin County Environmental <br /> Health Department(SJCEHD) <br /> 600 E. Main Street <br /> Stockton, CA. 95202-3029 <br /> office: (209)468-3454 <br /> pager: (209) 982-8771 <br /> email: minfurna sicehd.com <br /> 1/29/2008 <br />