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Adrienne Ellsaesser [EH] <br /> From: Nuel Henderson [EH] <br /> Sent: Tuesday, February 28, 2012 1:55 PM <br /> To: Adrienne Ellsaesser [EH] <br /> Subject: FW: cps Stockton revised well wplan <br /> Attachments: 20120224 RBK Stockton Revised RAP Well WP.pdf <br /> FYI <br /> From: Amy Terrell [mailto:aterrell@waterboards.ca.gov] <br /> Sent: Tuesday, February 28, 2012 12:01 PM <br /> To: Brian.Duggan@cpsagu.com <br /> Cc: tieonard@rubikenvironmental.com; Nuel Henderson [EH] <br /> Subject: cps stockton revised well wplan <br /> Dear Mr. Duggan, <br /> Thank you for providing the 24 February 2012 Revised Monitoring Well Destruction and Construction Scope of Work <br /> (revised work plan) prepared by Rubik Environmental for the Crop Production Services site in Stockton, at 1905 North <br /> Broadway. California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) staff <br /> reviewed the revised work plan and concur with the revised proposal, which is attached. <br /> The Work Plan incorporates the changes to the well destruction technique requested in Central Valley Water Board <br /> staffs 20 January 2012 letter. Monitoring well MW-2 is proposed to be destroyed by overdrilling, instead of by pressure <br /> grouting. In addition, Crop Production Services has changed the configuration for Monitoring well pairs MW-2A/B, MW- <br /> 22A/B, MW-23A/B and MW-24A/B from nested wells to independently constructed wells. Central Valley Water Board <br /> appreciate CPS acting on the suggestion. <br /> Central Valley Water Board staff concur with the revised work plan. The wells shall be destroyed and installed according <br /> to San Joaquin County regulations. Pursuant to a 28 February 2012 schedule update from Mr. Todd Leonard of Rubik <br /> Environmental, the wells are scheduled to be installed either March 26, or 2 April 2012. Central Valley Water Board staff <br /> have agreed to allow Crop Production Service to conduct semi-annual monitoring in April, in order to sample the new <br /> wells and the current wells on the same schedule. The due date for the semi-annual monitoring report is extended to 1 <br /> June 2012 in order to include the new monitoring data. <br /> If you have any questions, you may contact me as follows. <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 /> aterrell aawaterboards.ca.00v <br /> i <br />