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TRAPP21 MINING inc. <br />April 15, 2015 <br />CERTIFIED <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division <br />WQCD -P -B2 <br />4300 Cherry Creek Dr. South <br />Denver, CO 80246 -1530 <br />t�J�O <br />Subject:°. . First Quarter 2015 Colorado Wastewater Discharge Monitoring Reports . i.' <br />Permit No. CO- 0032115 ; <br />To Whom It May Concern: <br />�a. <br />Enclosed are Trapper Mine's First Quarter 2014 Colorado Wastewater Discharge Monitoring Reports for the period <br />01/1/15- 03/31/15. During this quarter, four NPDES outfalls were active. Outfalls 001 and 002 discharged routinely <br />throughout the quarter. Outfalls 011 and 020 discharged in response to spring snowmelt occurring in February and <br />March. Outfalls 008, 009, 017, 018, 019, 021, 022, 023 and 024 did not discharge during the quarter. Values <br />reported on the enclosed DMRs represent the maximum (or minimum as applicable) monthly /daily values generated <br />at each outfall during the quarter. <br />The TDS is reportable on a quarterly basis per our permit. The TDS values are as follows for each active outfall: <br />001 <br />002 <br />Oil <br />020 <br />3380 mg/L <br />2010 mg/L <br />3020 mg/L <br />1580 mg/L <br />Also enclosed are monthly NOAA weather summaries for the reporting period. The enclosed NOAA weather <br />summary reports show the temperatures and precipitation measurements for the period mentioned. Daily <br />precipitation measurements are recorded at 7:00 a.m. as well as daily maximum and minimum temperatures from the <br />previous 24 hours. <br />One exceedance of the primary effluent limitations occurred at an outfall during the quarter. A value of 40 mg/L for <br />Total Suspended Solids and 1350 ug/L for Total Iron was reported. Warming temps and residual snowpack in this <br />watershed created a spring snowmelt event at this outfall. This exceedence is applicable for the alternative <br />reporting limits based on Settleable Solids. Settleable Solids were reported at <0.1 mg/L for this sample date at <br />outfall 002 and would not be a violation of the NPDES discharge permit. On the day of sampling, it appeared the <br />warm afternoon and snowmelt was running directly down the access road to the pond and discharging into the pond <br />near the spillway area. A plume of discolored water was present at this inflow spot, in an otherwise clean pond. <br />Other ponds sampled on that date were in compliance. This exceedance appeared to be related to the localized snow <br />melt around the pond. <br />Trapper is required to maintain sediment levels in ponds at or below 60% of the pond volume. All outfalls have <br />been properly maintained and no ponds exceeded the 60% threshold for sediment accumulation. <br />P.O. Box 187 Craig, Colorado 81626 (970) 824 -4401 <br />