2014-03-31_REPORT - C1980005 - Laserfiche WebLink

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Page 3 of 5 Quality Control Division (WQCD), the WQCD will be responsible for enforcing CDPS permit conditions. 8. Basic Standards for CWQCC regulations The manganese standard was exceeded three times at Site Surface Water 31.1.11 008 and one time at Spoil Spring 009. Based on CWQCC reg. 31, the standard of 0.2 mg /1, applies to plants grown in acidic soils ( <6.0 pH). In alkaline soils, as found on the Seneca II site, the EPA standard would be 10 mg /1. The maximum manganese value observed at any surface site was 1.63 mg /1. 9. Instream Numeric CWQCC regulation 33.0 Four Seneca II monitoring sites exist within the Fish Creek Standards Drainage: The 008 outfall and SSB12 are on Bond Creek and discharge into Fish Creek which is on Segment 13b of the Yampa River basin. Sites SSF11 and SSF13 are on Fish Creek. The stream standards for Fish Creek are based on aquatic life standards. The total recoverable iron standard (1.0 mg /1) was exceeded at sites SSF11 and SSF13. See Item No. 7 above for Selenium exceedance at NPDES8. 10. Interim Narrative CWQCC regulation It was determined that bed rock groundwater points of Standard for Ground Water 41.5.C.6 compliance are unwarranted at the Seneca II mine. Well SFAL72 serves as the Seneca II Mine's Fish Creek Alluvial ground water point of compliance. Ambient values for this site were higher than the Reg. 41 standards for iron and manganese, nitrate, and sulfates. The iron standard (0.35 mg /1) was exceeded with a value of 3.61 mg /I in May and 3.05 mg /I in September. It appears that the high iron values observed at SFAL72 are not likely the result of discharges at Seneca II due to the iron value levels at Alluvial Well SBAL68 and SCAL69. 11. Sampling frequency at Volume 14, p. 2.04.7 -2 The report indicates that all frequencies were met. surface water of CDRMS mining permit C- 1980 -005 12. Parameters to be Volume 14, p. 2.04.7 -2 Parameters to be sampled are conductivity (umhos /cm), pH sampled at surface water of CDRMS mining permit (units), temperature (C), total recoverable iron (mg /1), sites C- 1980 -005 dissolved manganese (mg /1), total mercury (ug /1), total ammonia (mg /1), dissolved nitrate (mg /1), dissolved nitrite (mg /1), dissolved selenium (ug /1), dissolved sulfate (mg /1), total sulfide (mg /1), total suspended solids (mg /1), and total dissolved solids (mg /1). All parameters were met. 13. Filing frequency of pond CDRMS regulation Pond 008 remains as the only sediment pond associated with reports 4.05.9(17) C- 1980 -005. Quarterly pond inspections were conducted within the appropriate quarter. 14. Timely filing of pond CDRMS regulation Quarterly pond inspection reports were submitted and reports 4.05.9(17) received by the Division within an appropriate timeframe. 15. Content of pond reports CDRMS regulation All required information was addressed on quarterly