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PARTI <br />Page No. 8 <br />Permit No.: CO-0040827 <br />2. Salinity Parameters <br />In order to obtain an indication of the quantity of Salinity, measured as total dissolved solids (TDS), being dischazged from <br />the site the petmittee shall monitor the wastewater effluent at the following frequencies: <br />Outfall Freauencv Sample Tvoe <br />001, 002 Quarterly Grab <br />Self-monitoring samples taken incompliance with the monitoring requirements specified above shall be taken at those <br />locations listed in Part I.B.1. <br />Where, based on a miminntm of 5 samples, the permime demonstrates to the satisfaction of the Division that the level of total <br />dissolved solids (TDS) in the effluent can be calculated based upon the level of electrical conductivity, the pennittee may <br />meastue and report TDS in terms of electrical conductivity. <br />C. DEFINITIONS OF TEEMS <br />1. "Chronic lethality" occurs when a statistically sig~cant difference, at the 95% confidence level, occurs in the chronic test <br />between the mortality of the test species in 100% effluent (the chronic IWC = 100%) and the control. <br />2. "Composite" sample is a minimum of four (4) grab samples collected at equally spaced two (2) bout intervals and <br />proportioned according to flow. <br />3. "Continuous" measurement, is a measurement obtained from an automatic recording device which continually measures <br />provides measurements. <br />(~~~~-'~'.4. "Daily Maximum limitation" means the limitation for this parameter shall be applied as an instantaneous maximum (or, for <br />~, .. <br />pH or DO, instantaneous minimum) value. The instantaneous value is defined as the analytical result of any individual <br />sample. DMRs shall inchuie the maximum {and/or minimum) of all instantaneous values within the calendaz month. Any <br />instantaneous value beyond the noted daily maximum limitation for the indicated parameter shall be considered a violation of <br />this permit. <br />5. "Dissolved (D) metals fraction" is defined in the Basic Standards and Methodolocies for Surface Water 1002-31, as that <br />portion of a water and suspended sediment sample which passed through a 0.40 or 0.45 iJM (micron) membrane filter. <br />Determinations of "dissolved" constituents are made using the filtrate. This may include some very small (colloidal) <br />suspended particles which passed through the membrane filter as well as the amount of substance present in tme chemical <br />solution. <br />6. "Gmb" sample, is a single "dip and take" sample so as to be representative of the pazameter being monitored. <br />7. "In-situ" measurement is defined as a single reading, observation or measurement taken in the field at the point of discharge. <br />8. "Instantaneous" measurement is a single reading, observation, or measurement performed on site using existing monitoring <br />facilities. <br />9. "Potentially dissolved (PD) metals fraction" is defined im the Basic Standazds and Methodoloeies for Surface Water 1002-31, <br />as that portion of a constituent measured from the filtrate of a water and suspended sediment sample that was fast treated with <br />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-LJM (micron) <br />membrane filter. Note the "potentially dissolved" method cannot be used where nitric acid will interfere with the analytical <br />procedure used for the constituent measured. <br />10. "Quarterly measurement frequency" means samples may be collected at any time during the calendar quarter if a continual <br />- dischazge occurs. If the discharge is intermittent, then samples shall be collected during the period that dischazge occurs. <br />11. "Recordei' requires the continuous operation of a chart and/or totalizer (or drinking water rotor meters or pump hour meters <br />where previously approved.) <br />Last Revised 8/28/2003 <br />