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<br />Request for Review of Limited Mining Proposal <br />at the Haldorson Sand and Gravel Mine <br />M-2003-037 <br />Supplemental Information to December 24, 2003 Submittal <br />February 23, 2004 <br />1. Introduction <br />Since the initial submittal of December 24, 2003, additional information and data has <br />been collected that have significant bearing on the question of potential exposed <br />groundwater at the Haldorson Gravel Mine. This information includes monitor well <br />drilling, logging and water level measurement, gravel sieve analysis and percolation <br />testing, additional geology investigations and letters from people directly involved in <br />some of the surrounding pits demonstrating that water was encountered at only extremely <br />low levels, if at all. <br />2. Additional Drilling and Water Monitoring Data <br />Mazk Haldorson, the operator, drilled 8 water monitoring holes in January of 2003, <br />through Wildcat Drilling and Pump, Inc. of Cedazedge. All of the holes confirmed the <br />thickness of the gravel in Phases 1 and 2 of 57-64 feet. At the south end of Phase 4, the <br />gravel is 36 feet deep, as shown by Well WA-8, which was added at the discretion of the <br />operator and not part of the approved well sampling plan. Well WA-7, drilled at the <br />extreme southern end of the property, shows no gravel at all. The other 7 wells, WA-1 <br />through WA-7, were part of the original plan and were installed to bedrock as planned. <br />A revised Exhibit 2 -Site Plan shows all well locations and basic log information. <br />Detailed logs are found in Appendix A. <br />The wells around Phase 1, WA-1 through WA-4, show gravel to 64 feet from the surface. <br />This confirms that the gravel is very thick over the entire width of the pit, not just on the <br />west end, as shown by the previous hole drilled in the northeast corner of Phase 1. This <br />means there is no chance that water could be close to the surface in any part of Phase 1 <br />due to the shale being so faz from the surface. Therefore, mining to an initial depth of 13 <br />feet has no risk in encountering water, even during irrigation season. <br />All wells are being monitored once per week, at the same time. Current data that has been <br />collected shows that water levels range from approximately 0' to 1' from the bottom of <br />the well. <br />2 <br />