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vs AR Ash scatter - graphs, but these data are indistinguishable from the 2004 <br />drilling data. <br />The calculated ASG values were removed from the database. It is proposed that <br />the summer intern available for the geological group be tasked with reviewing <br />the ASG data sheets and ASG data in the database to ensure only tested ASG <br />values exist in the database. <br />Revised ASG Calculations <br />The equation used to calculate ASG values included Total Moisture and As- <br />received Ash to determine a linear relationship between moisture /ash and ASG. <br />However, when plotted on a scatter -graph against As- received Ash the ASG <br />values from this equation are significantly lower for those samples with Ash <br />values less than 30 %, see Figure 2. <br />Highland GeoComputing, LLC (HGC) derived a different ASG equation that <br />incorporates total moisture and As- received Ash while reflecting the overall trend <br />of the actual ASG data. The HGC equation accounts for the geometric increase <br />in ASG as Ash increases. It was noted while reviewing a scatter -graph of actual <br />ASG vs AR Ash values that the best fit regression curve is a second order <br />polynomial equation. The HGC equation approximates that polynomial equation. <br />The HGC equation is: <br />(M /100) + (((A + (A *SF) / 100) *AD) + (1- (M +(A +(A *SF) /100)) * CD <br />o Where: <br />• CD = Default Coal Density: 1.34 <br />• AD = Default Ash Density : 1.95 <br />• SF = Scale Factor: 0.11 <br />• M = Total Moisture: analytical value <br />• A = As- Received Basis Ash: analytical value <br />Figure 3 illustrates the ASG values estimated from the HGC equation compared <br />to actual ASG values for all available data. Figure 4 illustrates the same data up <br />to ash values of 30 %. <br />