2018-08-08_PERMIT FILE - C1982056 (14)

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PART 11 Page No. 17 Permit No. COG -850000 sample. DMR's shall include the maximum (and/or minimum) of all instantaneous values within the calendar month. Any instantaneous value beyond the noted daily maximum limitation for the indicated parameter shall be considered a violation of this permit. 6. "Dissolved (D) metals fraction" is defined in the Basic Standards and Methodologies for Surface Water 1002-31, as that portion of a water and suspended sediment sample which passed through a 0.40 or 0.45 UM (micron) membrane filter. Determinations of "dissolved" constituents are made using the filtrate. This may include some very small (colloidal) suspended particles which passed through the membrane filter as well as the amount of substance present in true chemical solution. 7. "Grab" sample, is a single "dip and take" sample so as to be representative of the parameter being monitored. 8. "In-situ" measurement is defined as a single reading, observation or measurement taken in the field at the point of discharge. 9. "Instantaneous" measurement is a single reading, observation, or measurement performed on site using existing monitoring facilities. 10. "New source" is generally defined as a coal mine (or major alteration to a coal mine) the construction of which commenced after May 4, 1984. See 40 CFR 434.110) for the complete definition. 11. "Potentially dissolved (PD) metals fraction" is defined in the Basic Standards and Methodologies for Surface Water 1002- 31, as that portion of a constituent measured from the filtrate of a water and suspended sediment sample that was first treated with nitric acid to a pH of 2 or less and let stand for 8 to 96 hours prior to sample filtration using a 0.40 or 0.45 -UM (micron) membrane filter. Note the "potentially dissolved" method cannot be used where nitric acid will interfere with the analytical procedure used for the constituent measured. 12. "Quarterly measurement frequency" means samples maybe collected at anytime during the calendar quarter if a continual discharge occurs. If the discharge is intermittent, then samples shall be collected during the period that discharge occurs. 13. "Recorder" requires the continuous operation of a chart and/or totalizer (or drinking water rotor meters or pump hour meters where previously approved.) 14. "Settleable solids analytical procedure" is contained in 40 CFR 434.64. The method detection limit for measuring settleable solids under this part shall be 0.4 ml/l. 15. "Seven (7) day average" means, with the exception of fecal coliform or E. coli bacteria, the arithmetic mean of all samples collected in a seven (7) consecutive day period. For fecal coliform or E. coli bacteria, it is the geometric mean of all samples taken in a seven (7) consecutive day period. Such seven (7) day averages shall be calculated for all calendar weeks, which are defined as beginning on Sunday and ending on Saturday. If the calendar week overlaps two months (i.e. the Sunday is in one month and the Saturday in the following month), the seven (7) day average calculated for that calendar week shall be associated with the month that contains the Saturday. Samples may not be used for more than one (1) reporting period. (Not applicable to fecal coliform or E. coli determinations.) 16. "Thirty (30) day average" means the arithmetic mean of all samples collected during a thirty -consecutive -day period. The permittee shall report the appropriate mean of all self-monitoring sample data collected during the calendar month on the Discharge Monitoring Reports. Samples shall not be used for more than one reporting period. 17. "Total Metals" means the concentration of metals determined in an unfiltered sample following vigorous digestion (Section 4.1.3), or the sum of the concentrations of metals in both the dissolved and suspended fractions, as described in Manual of Methods for Chemical Analysis of Water and Wastes, U.S. Environmental Protection Agency, March 1979, or its equivalent 18. "Total Recoverable Metals" means that portion of a water and suspended sediment sample measured by the total recoverable analytical procedure described in Methods for Chemical Analysis of Water and Wastes, U.S. Environmental Protection Agency, March 1979 or its equivalent. 19. "Twice Monthly" monitoring frequency means that two samples shall be collected each calendar month on separate weeks with at least one full week between the two sample dates. Also, there shall be at least one full week between the second sample of a month and the first sample of the following month. 20. "Visual" observation is observing the discharge to check for the presence of a visible sheen or floating oil. 21. "Water Quality Control Division" or "Division" means the state Water Quality Control Division as established in 25-8-101 et al.