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Kimley»>Horn <br />Page 4 <br />existing PVC well casing and in the annular space between the existing PVC <br />casing and liner. <br />b. The existing cement grout lodged in the well S4 completion interval should be <br />drilled out and acidized. <br />c. The liner installation is not guaranteed to be successful and would reduce the <br />effective diameter of the well casing to less than 10 -inches, which is <br />equivalent to the current pump column pipe diameter. <br />d. The proposed liner may not pass the entire length of the well casing due to <br />plumbness and alignment issues identified in the 2005 CDM Phase II report <br />and observed each time the well S4 pump assembly was removed and/or <br />installed. <br />e. A reduction in well capacity will likely result <br />f. Due to the high costs and unforeseeable complications associated with the <br />stainless steel liner installation, it is not recommended. <br />g. $150,000 to $250,000 COST <br />3. Over drill the top of the well casing down to 100 feet and replace damaged <br />casing with new PVC casing. <br />a. Over drilling and replacing the existing PVC well casing with new PVC well <br />casing to a depth of 100 feet in an experimental approach that would have <br />similar costs as constructing a new well. <br />b. The approach is not guaranteed to work effectively and complications that <br />arise during the process may render the well unsalvageable and is not <br />recommended. <br />c. COST NOT DETERMINED <br />4. Plug & abandon the well, drill new well and install new pump on same site. <br />a. This approach would provide IRCUD the opportunity for having a properly <br />constructed UFA water supply well for the South Oslo Plant. <br />b. IRCUD already has competitively bid pricing for new well construction, and <br />mobilization costs are minimized. <br />c. New well construction is recommended. <br />d. $500,000 - $800,000 COST, depending on use of existing or new equipment <br />(See attached opinion of probable replacement costs, including well casing <br />replacement with existing equipment and new equipment) <br />Based on our observations and evaluation of the existing production well S-4 condition, we <br />recommend option 4 to drill a new well and plug and abandon the existing well. Either option <br />kimley-horn.com <br />1920 Wekiva Way, Suite 200, West Palm Beach, FL 33411 <br />561 845 0665 <br />P104 <br />