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<br />July 14, 1988 <br />Addendum to Discharge Monitoring Report <br />Walden Coal Company hed discharge from two of its four sedimentation ponds <br />during the second quarter of 1988. Discharge from these ponds was the direct result of <br />snowmelt runoff. <br />The pH of water samples taken from the discharge ranged from 6.4 to 6.6. Water <br />samples taken from Mann Draw as it entered the Bourg property (i.e. unaffected by <br />mining activity), had pH's of 6.2 and 6.3 during the same period of time. For some <br />reason, unknown to Walden Coal Company, natural pH levels were below those allowed by <br />our C.P.D. E.S. permit. <br />.P, <br /> <br />