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mitigation. Linc Energy will only be responsible for hazardous material(s) that are brought onto <br />the site with respect to Linc Energy's site characterization activities. In the event of a hazardous <br />material release, Linc Energy will take immediate and appropriate mitigation measures. No <br />hazardous materials will be stored long term at the drilling site. Linc Energy will require that all <br />contractors adhere to strict policies concerning hazardous material importation, handling, and <br />disposal. Contractors will be instructed to maintain good housekeeping procedures with all <br />materials brought onto the site. All materials brought onto the site will be removed from the <br />site once the drilling operations are complete. This includes the removal of all trash and waste <br />materials generated during drilling and sampling activities. <br />Sealing, Plugging and Abandonment of Drill Holes and Wells <br />The guiding principle to be followed in the sealing, plugging and abandonment of drill holes and <br />wells is restoration, as far as feasible, of the controlling geologic and hydrogeologic conditions <br />that existed before the drill hole or well was drilled and /or constructed. Linc Energy will seal, <br />plug and abandoned all geologic exploration drill holes, test holes, hydrogeologic <br />characterization wells, test wells, uncompleted wells, and completed wells once their use is no <br />longer required with respect to various site activities. These practices will be undertaken to <br />eliminate physical hazards, prevent cross - contamination of groundwater and groundwater with <br />surface water, to conserve yield and hydrostatic head of aquifers and to prevent intermingling <br />of desirable water with undesirable waters. <br />Linc Energy will seal and abandon all drill holes and wells using the following methodology. Each <br />drill hole or well will be accurately measured for total depth before it is sealed to ensure <br />freedom from any obstructions that may interfere with effective sealing operations. Final <br />measurement of static water levels and depths shall be recorded for drill holes and wells. It may <br />be determined that the removal of liner pipe or casing from some wells may be required to <br />ensure placement of an effective seal. A determination will be made on a case -by -case basis; <br />otherwise, completed well casings will be typically left in place as part of the well abandonment <br />procedures. In this case, the top three -feet of the well casing will be cut off and properly <br />disposed of in an approved landfill. Standard high quality cement shall be used as the primary <br />sealing material and shall be placed from the bottom upwards by methods that will avoid <br />segregation or dilution of the cement /grout material. Complete and accurate records shall be <br />kept of the entire abandonment procedure for each drill hole and /or well in order to provide <br />detailed records for future use and reference, as well as to demonstrate to the Division that the <br />drill hole and /or well was properly sealed. Information to be recorded will include total depth <br />of drill hole and /or well sealed including depth of each layer of any backfilling materials. The <br />quantity and type of sealing materials used shall be documented. Any changes or deviations <br />