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2. Fluid Displacement -The fluid in the top ten to twenty feet within the <br />cavity would be displaced with nitrogen, carbon dioxide, or methane <br />gas and a cavity depth versus cavity volume relationship will be <br />established. This relationship can be used to cross check the seismic <br />representation of the cavity shape and size. <br />On February 19, 2004, ASLLP met with representatives of the EPA, CDMG, <br />and BLM to finalize the cavity characterization plan. ASLLP proposed the cavity <br />characterization on well 28-21 beginning in Late April of 2004 and to continue to <br />mine well 29-24 to a cavity diameter of 225 feet. Upon achieving 225' of cavity <br />diameter, the cavity on 29-24 would then be characterized using the seismic <br />method. <br />On April 1, 2004, American Soda, LLP a subsidiary of Solvay America, Inc., <br />announced that solution mining activities at its Piceance Creek, Colorado <br />nahcolite mine and the dense soda ash production at Parachute, Colorado <br />would be mothballed due to high energy costs. The production ramp down is <br />scheduled for July, 2004 -October, 2004. Mothballing activities are scheduled <br />for October, 2004 -December, 2004. <br />2. Chronology of Seismic Profile and Displacement Characterizations <br />On April 26, 2004, NSA Geotechnical Services, Inc. initiated the downhole <br />seismic profiling of the solution mined cavern on AS Well 28-21. NSA's field <br />activities were concluded on April 29, 2004. NSA's report is attached in <br />Appendix A. <br />On April 30, 2004 ASLLP performed a temperature log of AS Well 28-21. <br />(Attached in Appendix B) <br />On May 10, 2004, Wellserv Intervention Services performed a series of <br />temperature.logs on AS Well 28-21 to establish the position of the nitrogen gas <br />cap. (Attached in Appendix B) <br />On May 12, 2004, ASLLP initiated the nitrogen displacement procedure on <br />AS Well 28-21. <br />On May 21, 2004, Wellserv Intervention Services performed a series of <br />temperature logs on AS Well 28-21 to establish the position of the nitrogen gas <br />cap. (Attached in Appendix B) <br />On May 28, 2004, Wellserv Intervention Services performed a series of <br />temperature logs on AS Well 28-21 to establish the position of the nitrogen gas <br />cap. (Attached in Appendix B) <br />