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Geosynteccl' 3043 Gold Canal Drive,Suite 100 <br /> Rancho Cordova,California 95670 <br /> PH 916.637.8048 <br /> consultants www.geosyntec.com <br /> 30 January 2023 <br /> San Joaquin County <br /> Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> Subject: Well Destruction Permit Application <br /> Rough and Ready Island,Port of Stockton, Stockton, CA 95203 <br /> To Whom It May Concern: <br /> On behalf of the Port of Stockton, Geosyntec is planning to destroy piezometer P-108 at Rough and <br /> Ready Island (APN 16-203-007), as a continuation of the work described in the Rail Line Area <br /> Monitoring Well Destruction Work Plan. During construction activities, piezometer P-108 was found <br /> within the work area. P-108 is a damaged 1-inch piezometer that had not been included in the Work Plan. <br /> P-108 will be overdrilled to a total depth of 16.9 feet below ground surface, destroying the casing, and the <br /> boring will be backfilled with neat cement grout using a tremie pipe. Planned auger size for drill out is 6- <br /> inch diameter. All derived waste will be placed in a container, analyzed for contaminates and hauled off <br /> site by a certified waste hauler. The selected driller, Penecore Drilling, is a C-57 certified environmental <br /> driller. Please find the enclosed well permit application package. Included in this application package are <br /> the following: <br /> • Attachment 1 —Well and Boring Permit Application for Rough and Ready Island including maps <br /> and Penecore Drilling C-57 license contractor declaration; <br /> • Attachment 2— Rail Line Area Monitoring Well Destruction Work Plan Addendum <br /> • Attachment 3 —DTSC and Central Valley Water Board Approval for the Work Plan'; and <br /> • Payment receipt for the amount of$156 for the permit application <br /> Per a phone call with Jeffrey Wong on January 30, 2023, this work will be considered a continuation of <br /> work conducted in November 2022, service request number 85787. The previously submitted Master File <br /> Record from permit number WP0043787 is still valid, and a new MFR has not been included in this <br /> packet. <br /> 1 Relevant appendices are included in this submittal. Additional appendices are available on the project's Envirostor <br /> page(https://www.envirostor.dtsc.ca.goy/public/profile report? lg obal id=39420010). <br /> engineers I scientists I innovators <br />