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completion of the seismic measurements, the fluid displacement phase can be <br />performed. <br />ASLLP would like to explore the possibility of extending the cavity size for well <br />29-24 to 225 feet in diameter (or larger). Attached is the rock mechanics <br />analysis that shows that larger diameter cavities are stable. The temperature of <br />the cavity in well 29-24 is projected to be 275 - 300 degrees Fahrenheit. If well <br />29-24 is used for the characterization, the well would lose significant heat. <br />ASLLP would need to replace this heat to continue mining well 29-24 to a larger <br />diameter. <br />Alternative 2 <br />With permission from all agencies, continue to mine well 29-24 to a <br />diameter of 225 feet as a test cavity. Perform the cavity characterization including <br />seismic and displacement on well 28-21 (Figure 2). Well 28-21 is currently on <br />standby. The well currently has a radius of 79.5 feet and a diameter of 159 feet. <br />The well is currently on standby and heat will need to be added to the well to <br />bring the well back into service. The temperature of the cavity is projected to be <br />250 - 275 degrees Fahrenheit. Upon well 29-24 reaching 225 feet in diameter, <br />ASLLP will perform a seismic cavity characterization on the well. <br />This document is intended to describe the characterization for agency <br />approval. Since actual characterization will not occur until spring, 2004, ASLLP <br />has time to refine or revise the procedures to insure that the procedures meet all <br />agency expectations. <br />Questions, comments, or suggestions are welcomed. <br />List of Figures <br />jkEs-L .t, veLy 0.rG „^.~.~5.cc~ <br />Figure 1 -Cross Section of Well 29-24 S <br />Figure 2 -Cross Section of Well 28-21 ~ ~-'~ ° -L'inL~ ae~'c ~ ` ~'~"" ~' a' r <br />Attachments <br />Mechanical Stability of Solution Caverns During Cavern Characterization Testing, <br />(Agapito, June, 2003) <br />Well Location Map <br />