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CDM <br /> 11373 N.Lower Sacramento Rd <br /> Lodi,CA 95242 <br /> Phone:209-365A620 <br /> Fax:209-365A639 <br /> September 23,2010 <br /> ( <br /> Timothy R.O'Brien <br /> Engineering Geologist <br /> Central Valley Regional Water Quality Control Board <br /> 11020 Sun Center Drive,#200 Rancho Cordova,CA 95670-6114 <br /> Subject: City of Stockton,Delta Water Supply Project(DWSP) <br /> Piezometer Well Abandonment Permit Request <br /> Monitoring&Reporting Program No.115-20 10-115010 <br /> CVRWQCB Permit No.WQRNo.2003-0003-DWQ-R5010 <br /> Dear Mr. O'Brien, <br /> This letter serves as notice that in respect to the Stockton DWSP pipeline construction dewatering <br /> activities on Empire Tract,there are only three wells that are currently operating within 1,000 feet of <br /> the right angle comer of the pipeline(near Herman and Helen's Marina). All other related dewatering <br /> activities have ceased within this area and by Friday, September 24`",the operation of the remaining <br /> three wells also will cease. <br /> In accordance with the NOA,monitoring no longer is required when there are no dewatering activities <br /> within the specified 1,000 ft area. However,CDM will continue to collect readings from the <br /> piezometer data loggers up to the morning of Tuesday,September 28u`when Klienfelder is scheduled to <br /> begin the well abandonment process. This process is expected to take two days. The abandonment of <br /> the piezometers must be completed by midnight September 3&as they are located within an area that <br /> is considered habitat for the Giant Garter Snake,and the project EIR requires all activities in GGS <br /> habitat must be completed by October I". <br /> CDM respectfully requests that your office approve Klienfelder's request for the issuance of a <br /> conditional San Joaquin County permit in order to allow the abandonment process to be completed <br /> prior to the October 1 deadline. CDM will provide an additional letter prior to well abandonment to <br /> confirm that the dewatering activities has ceased as scheduled. <br /> Respectfully, <br /> Mark R.Andrews <br /> Senior Project Manager—DWSP Pipelines <br /> CDM Constructors Inc. <br /> i <br /> Oowmenl wEe '... <br />