2017-05-22_PERMIT FILE - C1981025A (2)

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PART Page of 19 Permitt No.:.: CO -048233 Code Event Description Due Date 50008 Submit Study Collect site-specific data, perform threshold tests based on Mixing 12/31/2010 Results Zone Exclusion Tables, and submit study results. b. Installation of Temperature Monitoring Equipment- The following compliance schedule is included to give the facility time to install temperature monitoring equipment for the effluent. Code Event Description Due Date. 04301 Install The permittee is to submit a document certifying that continuous Temperature temperature and flow monitoring equipment has been installed and 05/01/2010 Meters is operational. No later than 14 calendar days following each date identified in the above schedule of compliance, the permittee shall submit either a report of progress or, in the case of specific actions being required by identified dates, a written notice of complance or noncompliance, any remedial actions taken, and the probability of meeting the next scheduled requirement. C. DEFINITIONS OF TERMS 1. "Composite" sample is a minimum of four (4) grab samples collected at equally spaced two (2) hour intervals and proportioned according to flow. 2. "Continuous" measurement, is a measurement obtained from an automatic recording device which -continually measues provides measurements. • 3. "Daily Maximum limitation" for all parameters except temperature, means the limitation for this parameter shall. be applied as an instantaneous maximum (or, for pH or DO, instantaneous minimum) value. The instantaneous value isiefuled as the analytical result of ariy individual sample. DMI(R 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 parametr shall be considered a violation of this permit. 4. "Daily Maximum Temperature (DM)" is defined in the Basic Standards and Methodologies for Surface Water 1002-31, as the highest two-hour average water temperature recorded during a given 24-hour. period. 5. "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. 6. "Grab" sample, is a single "dip and take" sample so as to be representative of the parameter being monitored. 7. "In-situ" measurement is defined as a single reading, observation or measurement taken in the field at the point of discharge. 8. "Instantaneous" measurement is a single reading, observation, or measurement performed on site using existing monitoring facilities. 9. "Maximum Weekly Average Temperature (MWAT)" is defined in theBasic Standards and Methodologies for Surface Water 1002-31, as an implementation statistic that is calculated from field monitoring data. The MWAT is calculated as the largest mathematical mean of multiple, equally spaced, daily temperatures over a sevenday consecutive period, with a minimum of three data points spaced equally through the day. For lakes and reservoirs, the MWAT is assumed to be equivalent to the maximum WAT from at least three profiles distributed throughout the growing season (generally JulySeptember). 10. "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 vith 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.