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r_ <br />T~APP~~ ~_~_~~ _~~. III IIIIIIIIIIIIIIII <br />July 27, 1998 <br />CERTIFIED A'Z138714948 RECEIVED <br />uu~ 3 0 ~ <br />Ms. Cazla Lenkey D4V. OF MINERALS <br />Colorado Depaztment of Public Health and Environment & GEOLOGY <br />WQCD-PE-B2 <br />4300 Cherry Creek Dr. South <br />Denver, CO 80222-1530 <br />Subject: Second Quarter 1998 Colorado Wsstewater..DiscHarge Monhoring Reporks, <br />Permit No. CO-0032115 <br />Deaz Ms. L.enkey: <br />Enclosed aze Trapper Mine's Second Quarter 1998 Colorado Wastewater Discharge <br />Monitoring Reports for the period 4/1/98-6/30/98. During this quarter, nine NPDES outfalls <br />were active. Outfalls 001, 002, 008, 010, 011, and 017 dischazged routinely throughout the <br />quarter. Outfa11006 dischazged through the first week in June. Outfa11005 discharged for the <br />first three weeks of April, and outfall 009 discharged only during the first week of April. <br />Outfalls 003, 012, 013, 014, 015, 016, and 019 did not discharge during the quarter. Values <br />reported on the enclosed DMR's represent the maximum (or minimum as applicable) monthly <br />values generated at each outfall during the quarter. <br />Also enclosed aze monthly NOAA weather summaries for the reporting period, seep volume <br />data for site 011, and WET test report forms as applicable. Five outfalls were sampled for <br />WET analyses during the quarter. Two species tests were completed at outfalls 001, 005, 009, <br />and 011 while a single species test (P. promelas) was completed at outfall 002. No <br />exceedances of WET test limitations were observed at any of the outfalls. <br />Exceedances of primary effluent limitations aze noted as follows, however, in all instances, <br />alternate limitations are applicable as runoff was attributable to either snowmelt or <br />precipitation. At outfall 002, the primary 30~ay average limitation for T5S was exceeded by <br />a sample collected 5/6/98 (40 mg/1). However, the alternate daily maximum limitation for <br />settleable solids applicable in the event of discharge caused by precipitation less than or equal <br />to the 10-year, 24-hour precipitation event, was met. As noted on the enclosed monthly <br />NOAA weather summary for May, precipitation in the amount of 0.03" was recorded on <br />5/6/98. Daily precipitat'on measurements are typically recorded at 7:30 a.m.. The sample in <br />P.O. Box 187 Craig, Colorado 81626 (970) 824-4401 <br />