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Mike Infurna [EH] <br /> From: Amy Terrell [aterrell@waterboards.ca.gov] <br /> Sent: Wednesday, October 17, 2007 5:26 PM <br /> To: Sandra.Shearer@CH2M.com <br /> Cc: Mike Infurna [EH] <br /> Subject: Conditional concurrence KP-11S destruction <br /> Sandi, <br /> Thank you for providing the 17 October 2007 email documentation regarding the proposed <br /> destruction of shallow monitoring well KP-11S at the Koppel Stockton site, 2025 West <br /> Hazelton Avenue in Stockton. Central Valley Regional Water Quality Control Board <br /> (Regional Water Board) staff reviewed the scope of work describing the destruction <br /> procedure, the boring log, well construction diagram and the site map. As stated in the <br /> work plan, the damaged well contains about 12 feet of debris, which is likely to be <br /> flyash. The well will be overdrilled, materials removed, drummed, and stored on-site. <br /> Level C Personal Protective Equipment is specified. The open borehole will be sounded to <br /> verify all materials have been removed and will be tremie-grouted to surface grade. This <br /> work is scheduled to be conducted on 24 October 2007. <br /> Regional Water Board staff conditionally concur with the proposed destruction of KP-11S <br /> subject to the following conditions: <br /> 1. Clearly label and date all containers containing well destruction wastes 2 . Within 30 <br /> days of well destruction, provide a schedule for removing waste drums and a destination <br /> for the contents. <br /> 3 . Provide a brief well destruction report, which may be submitted as a section in the <br /> next semi-annual monitoring report. <br /> Thank you for quickly arranging for the destruction of this well and removal of the <br /> materials. <br /> If you have any questions, you may contact me at (916) 464-4680. <br /> Amy Terrell <br /> Regional Water Quality Control Board <br /> Central Valley Region <br /> 11020 Sun Center Drive Suite 200 <br /> Rancho Cordova, CA 95670-6114 <br /> (916) 464-4680 <br /> >>> <Sandra.Shearer@CH2M.Com> 10/16/2007 7:32 PM >>> <br /> Hi, Amy and Michael, <br /> Attached are the following documents in support of abandoning Monitoring Well KP-11S at <br /> the Koppel Stockton Terminal: <br /> 1. Statement of Work for CH2M HILL's subcontractor, Spectrum Exploration, detailing well <br /> destruction methodology 2 . KP-11S Soil Boring Log 3 . KP-11S Well Construction Diagram 4. <br /> Site Map showing location of KP-11S <br /> KP-IIS was damaged following the collapse of a warehouse operated by Headwaters Resources <br /> in early March 2007, and consequently KP-11S could not be sampled in March or August 2007. <br /> In August 2007, the bottom of Well KP-11S was measured at a depth of 10.8 feet bgs. The <br /> total well depth following construction in July 2006 was 24 feet bgs, indicating this well <br /> is obstructed or partially filled with debris. Well KP-11S is scheduled to be abandoned <br /> next Wednesday, October 24. <br /> Michael, please confirm that you are still available on October 24th to oversee well <br /> drilling and abandonment. You will need to have the PPE specified in the attached <br /> Statement of Work (Level C PPE) , including a full-face air-purifying respirator with Hepa <br /> 1 <br /> 1017/,0 7 (,ogalQG6 A//1 <br />