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Mountain Coal Company CO-0038776 SeaCrest Number 399272 <br />REFERENCES <br />APHA/AWWA/WPCF. 1985. Standard Methods for the Examination of Water and Wastewater. <br />16th Edition. American Public Health Association. 1268 pp. <br />Hach Chemical Company. 1978. DR-E1J2,3 and 4 methods manual. Hach Chemical Company, <br />Loveland, Colorado. <br />Weber, C.I. 1993. Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters <br />to Freshwater and Marine Organisms (Fourth Edition). EPA 600/490/023F. 293 pp. <br />The SeaCrest Group 4 <br />