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9ED <br /> ARCADIS 11 2011 <br /> ARCADIS U.S.,Inc. <br /> Infrastructure Water Environment Buildings ENVIRONMENTAL HF LTH 1410 Rocky Ridge Drive <br /> PERMIT/SERVICES Suite 330 <br /> Roseville <br /> California 95661 <br /> Tel 916 786 0320 <br /> Mr. Steven W. Meeks, P.E. Fax 916 786 0366 <br /> Central Valley Regional Water Quality Control Board www.arcadis-us.com <br /> 11020 Sun Center Drive#200 <br /> Rancho Cordova, CA 95670-6114 <br /> ENVIRONMENT <br /> Subject <br /> Well Destruction Work Plan <br /> Union Pacific Railroad Company L <br /> Tracy, CA— Maintenance Facility <br /> Date: <br /> October 6, 2011 <br /> Dear Mr. Meeks: <br /> Contact <br /> ARCADIS U.S., Inc. (ARCADIS) has prepared this Well Destruction Work Plan (Work James Eisert <br /> Plan) on behalf of the Union Pacific Railroad Company (UPRR) regarding the Former <br /> Maintenance Facility located at 720 East 6th Street in Tracy, California (the Site; Figure Phone: <br /> 1). This Work Plan has been prepared in accordance with the recommendations in 916.786.1871 <br /> the, "Monitoring Well Network Reduction Recommendation Letter," prepared by Email <br /> ARCADIS and dated April 26, 2011 (Well Destruction Letter), which recommended James.Eisert@ <br /> destroying 87 of the 127 existing groundwater monitoring (extraction, injection, etc.) arcadis-us.com <br /> wells. <br /> Our ref. <br /> The Well Destruction Letter was approved by the California Regional Water Quality RC000709.0002 <br /> Control Board (RWQCB) in a letter to UPRR dated September 23, 2011. Note that the <br /> RWQCB approved destruction of 86 rather than the proposed 87 wells. This Work <br /> Plan reflects the RWQCB's approval to destroy 86 wells. <br /> Purpose <br /> The purpose of this work plan is to describe the methods and procedures for <br /> destroying 86 wells formerly used for groundwater monitoring and/or remediation at <br /> the Site and surrounding area. The 86 wells to be destroyed are summarized on Table <br /> 1 and are shown on Figures 2 and 3. As shown on Table 1, 56 wells will be destroyed <br /> by pressure grouting technique and 30 wells will be destroyed by over-drilling and <br /> removing the wells. <br /> After the 86 wells are destroyed, revised sampling frequency and analytical methods <br /> for the updated groundwater monitoring well network will be proposed. <br /> Imagine the result <br /> tracy ca_maint facil_well dest wp(10-06-11).doc <br />