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COMMERCIALTESTING & ENGINEERING CO. <br />GENERAL OFFICES: 1616 SO VTIi HIGHLAND AVE., aURE 210.8, lOM6ARD. ILLINOIS 50148 . {712) 857-6700 <br />~~® <br />r.o. <br />MomDrar of iho SGS Group I5x4r: Orww a ewvwuuw) <br />ARIZONA PUBLIC SERVICE COMPANY <br />P.O. Box 53999 <br />Phoenix, Arizona 85072-3999 <br />Mail Station 1720 <br />le <br />~nd of sam <br />p COAL <br />reported to us <br />~~ DURANGO COAL COMPANY <br />Tple taken at <br /> DURANGO COAL COMPANY <br />ple taken by <br />~ <br />ate sampled XXXXXXXX <br /> 04/20/87 <br />late received <br />PLEASE ADDRESS ALL CORRESPONDENCE TO: <br />10775 E. 51ST AVE., DENVER, CO 80276 <br />April 28, 1987 TELEPHONE: (707) 77J~4772 <br />Sample Identification <br />by <br />DURANGO COAL COMPANY <br />Received 4/20/87 for APS <br />i <br />~ 4281 <br />2 <br />+ N a <br />SG A <br />ALY <br /> MI <br />FIZA <br />N <br />SIS OF <br />ASH <br /> Mineral Compound 8 Weight <br /> Silicon Dioxide 56.11 <br /> ALuminum Oxide 23.87 <br /> Titanium Dioxide 1.55 <br /> Ferric Oxide 13.05 <br /> Calcium Oxide 0.92 <br /> Magnesium Oxide 1.70 <br />{~~ Potassium Oxide 0.16 <br /> Sodium Oxide 1.71 <br />Sulfur Trioxide <br />Phosphorus Pentoxide <br />Strontium Oxide <br />Barium Oxide <br />Manganese Oxide <br />Undetermined <br />~~ Alkalies as Na20, Dry Coal Basis ~ 0.04 <br />_ Silica Value ~ 78.17 <br />Base: Acid Ratio ~ 0.22 <br />0.76 <br />0.02 <br />0.09 <br />0.06 <br />0.00 <br />0.00 <br />100.00 <br />Page 2 of 3 <br />(Ignited Basis) <br />Type of Ash ~ Bituminous <br />Fouling Type ~ MIDIUM <br />Slagging Type LOW <br />ESTIMATID VISCOSITY at critical viscosity <br />Temperature of 2545 Deg. F ~ 1100 Poises <br />T250 Temperatuce 2705 Deg. F Racprrctlully suemill.d. <br />Va COMMERCIAL TESTING 8 ENGINEER/7NG CO. <br />~~ ~!' / <br />r~l• ,~ <br />~PY WSISrmarkeA ~11~ `,.~ <br />r Your ProlMiorl Mon sr, nJlr L3poril~~ <br />:W~~ M ^taAMrM '.AA{14ATORIF<~ S'IRATFC,IC~V'v IJY,`,AT~.v AA7NF,~9V COA' Y~4~'Jtt AA~..AS ~~- <br />~ d `',.4 <br />- o <br />Y ~ - <br />~~ i <br />man <br />Cn~nsr M~mbar <br />