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Section 10-1 Construction Details <br /> Standard Specifications section P144 Speccial <br /> age 1 of <br /> SECTION 14 <br /> WELL DESTRUCTION <br /> 14-1. 0--GENERAL <br /> 14-1. 1 SCOPE <br /> In accordance with the specifications and as shown on the <br /> plans, the contractor shall supply all labor, materials, and <br /> equipment for the complete destruction of four water supply wells <br /> located in the Lincoln Village area of Stockton, California. All <br /> wells are located in San Joaquin County easements. All wells shall <br /> be destroyed in accordance with State of California Water Well <br /> Standards, Bulletins 74-81 and 74-90, the Standard Specifications <br /> and these Special Provisions. <br /> The Contractor's attention is directed to the fact that the <br /> provisions of Section 5-1. 14 , "Cost Reduction Incentive" , of the <br /> Standard Specifications are included in these Special Provisions <br /> and shall apply to the work. <br /> The following discussions summarize the well history for each <br /> well and describe the current well conditions. Diagrams of each <br /> well are provided in the Plans included in these Special <br /> Provisions. <br /> Well LVMD1--History and Description <br /> LVMD1 was originally drilled and installed in 1948 . The well <br /> was drilled using cable tool equipment. The records indicate that <br /> it was drilled to a total depth of 262 feet below ground surface <br /> (bgs) . Fourteen-inch-diameter 7 gage steel casing was placed from <br /> the surface to a depth of 102 feet bgs. Twelve-inch-diameter 10 <br /> gage steel casing was placed from 40 feet to approximately 200 feet <br /> bgs. This well was videotaped in 1985. Static groundwater was at <br /> a depth of 42 feet, and vertical perforations were noted to begin <br /> at 164 feet bgs. At 187 feet bgs, the well bottom was encountered, <br /> which was noted to be soft and sediments were present. A videotape <br /> also indicated a casing leak at a depth of 42 feet, with water <br /> pouring into the well at that depth. This breach in the casing is <br /> thought to have allowed PCE contamination into the well from <br /> between 35 to 65 feet bgs. The well was repaired by perforating <br /> the existing 14-inch-diameter casing and installing a 10-3/4 inch <br /> PVC liner. The liner was pressure grouted in place to a depth of <br /> 669115PELS�SECnoN.14 <br />