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• Section 10-1 shstruction Details Standard Specifications Section 14 Special Page 5 of 7 14-2 . 0 SPECIFIC REQUIREMENTS FOR WELL DESTRUCTION 14-2 . 1 WELL PREPARATION Each well shall be cleaned to remove any undesirable material . The screened intervals of the wells shall be swabbed to ensure that they are open and will accept grout, and any material brought into the wells by swabbing shall be bailed. In addition to the normal swabbing and bailing required to clear the perforations, Well LVMD2 and Well LVMD6 will require additional preparation work. Well LVMD2 will require additional bailing or jetting through the caved interval from 100 to 160 feet below ground surface (bgs) . The intention of this bailing is to clear the well down to the aquitard at that level. The Contractor shall make all reasonable efforts to bail to this depth. Should field conditions preclude the completion of this work, then a revised work plan will be prepared by the Engineer and performed by the Contractor. This work will be paid for as extra work in accordance with Section 4-1. 03D, "Extra Work" , of the Standard Specifications. Well LVMD6 shall have its 8-inch diameter PVC liner casing removed. The Contractor shall also remove the gravel pack between the liner and the 14-inch diameter steel casing. The intention of this work is to provide access to the outer casing and allow perforation operations to be performed. After removal of the casing and the gravel pack, the well shall be swabbed and bailed to clear the perforations. The contract price paid for well preparation shall include full compensation for furnishing all labor, materials, tools, equipment and incidentals, and for doing all the work involved in preparation of wells for destruction. Work includes swabbing and bailing. Costs for decontamination, waste containment and sampling are included in Section 14 . 1.4. 14-2.2 PERFORATION Blank casing below the sanitary seals of each well shall be perforated or ripped using equipment suitable for the size and type of casing materials at each well. Minimum equipment shall consist of either: (1) a "star" or "wheel" perforator capable of generating vertical perforations approximately 3/16-inch by 3/4-inch spaced approximately 2 inches apart; or (2) Mills knife, capable of creating a 1/4-inch wide linear perforation. At the Contractor's option, Well LVMD1 may be perforated using an explosive shot type perforator. The perforator shall be repositioned such that subsequent shots produce a uniform vertical distribution of perforations. Specific perforation specifications unique to each well are described below. All casings (including double casings) shall be 6691ISPECSI4EMON.14