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Lisa Medina [EH] <br /> From: Olton, Shane <Shane.Olton@stantec.com> <br /> Sent: Wednesday, December 19, 2012 4:20 PM <br /> To: Lisa Medina [EH] <br /> Subject: Chevron #9-4275 and ARCO#2133, 2905 and 2908 Ben Holt Drive,Stockton, CA 95207 <br /> - Revised Well Destruction Work Plan <br /> i <br /> Dear Ms. Medina, <br /> This email is regarding our discussions with respect to the status of ARCO well location R-1. The Revised Well <br /> 9 9 p <br /> Destruction Work Plan, dated December 5, 2012, lists well location R-1 as an ARCO well that will be destroyed as part of <br /> site closure activities. However, as you pointed out in our telephone correspondence on December 10, 2012, the R-1 well <br /> location was not presented on the Site Plan provided in the Work Plan. Subsequently, Stantec reviewed Geotracker and <br /> in house historical files and was able to find maps with the R-1 well location. According to historical reports well R-1 was <br /> installed at the ARCO Station in 1984 and used for groundwater extraction intermittently from 1984 to 1996. Given that the <br /> well was removed from the map overtime, it is unclear if the well still exists or has previously been destroyed. In order to <br /> move the site to closure it is requested that the Work Plan be approved as is and issuance of well destruction permits <br /> proceed while the location and presence of well location R-1 is field verified. If the well R-1 is not located in the field, a <br /> historical file search of county records and/or the DWR will be performed to determine if the well had been previously <br /> destroyed. Once the presence/fate of the well is confirmed to the extent possible, an addendum to the Work Plan will be <br /> submitted with the findings. <br /> Sincerely, j <br /> Shane Olton, PG <br /> Senior Geologist <br /> Stantec <br /> 3017 Kilgore Road Suite 100 <br /> Rancho Cordova CA 95670 <br /> Ph: (916)384-0758 <br /> Fx: (916)861-0430 <br /> Cell: (530)908-4404 <br /> Shane.Oltona-stantec.com <br /> stantec.com <br /> The content of this email is the confidential property of Stantec and should not be copied, modified, retransmitted,or used for any <br /> purpose except with Stantec's written authorization. If you are not the intended recipient, please delete all copies and notify us <br /> immediately. j <br /> 0 Please consider the environment before printing this email.. <br /> I <br /> i <br /> I <br /> 1 <br /> 1 <br />