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Part <br />Page <br />Permit No. CO-00451( <br />• Self-monitoring sampling by [he permittee for compliance with the monitoring requirements specified above shall be performed at th <br />following Outfalls: OOIA through O1 OA - at the outtalk of the sedimentation ponds prior to entering state waters as identified in Figwe <br />2 through 7. <br />If the permittee, using the approved analytical methods, monitors any parameter more frequently than required by this permit, then th <br />results of such monitoring shall be included in the calculation and reporting of the values required in the Discharge Monitoring Repot <br />Form (DMRs) or other forms as required by [he Division. Such increased frequency shall also be indicated. <br />b. Oil and Grease Monitorin¢ <br />For every outfall with oil and grease monitoring, in [he event an oil sheen or floating oil is observed, a gab sample shall b <br />collected, analyzed, and reported on the appropriate DMR. In addition, corrective action shall be taken immediately [o mitigate th <br />dischazge of otl and grease. A description ofthe corrective action taken should be included with the DMR. <br />2. Salinity Parameters <br />In order to obtain an indication ofthe quantity of Salinity, measured as total dissolved solids (TDS), being discharged from the site the <br />pennittee shall monitor the wastewater effluent at the following frequencies: <br />ut a s Fie Hens aiii e e <br />OOIA-0 OA uarter Gra <br />Self-monitoring samples taken incompliance with the monitoring requirements specified above shall be taken at those locations listed u <br />Part LB.1. <br />Where based.on a minimum of 5 samples, the permittee demonstrates to the satisfaction ofthe Division that the level oftotal dissolves <br />solids (TDS) m the effluent can be calculated based upon the level of electrical conductivity, the pemtittee may measwe and report TD£ <br />in terms of electrical conducttvtty. <br />C. DEFINITIONS OF TERMS <br />1. "Acute Toxicity" means there shall,be no acute toxicity in the effluent from the a licable dischar a point. The acute toxicity limitatioc <br />is exceeded tf t) a statistically si~ntficant difference in mortality (at the 95%cott~dence level) is o~served for either species between the <br />control and any dilution less tha~f or equal to the identified IWir or 2) a species mortality in any dilution of efflueni (including 100° <br />effluent) exceeds 50%. <br />. 2. "Chronic lethality" occws when a statistically si~rtificant difference, at the 95% confidence level, occws in the chronic test between [he <br />mortality ofthe fest species in 100% effluent (the chronic i WC = 100%) and the control. <br />3. "Composite" sample is a minimum of fow (4) grab samples collected at equally spaced two (2) how intervals and proportioned <br />according to flow. <br />4. "Continuous" measwement, is a measwement obtained from an automatic recording device which continually measures provides <br />measwements. <br />5. "Daily Maximum limitation" means th <br />instantaneous minimum) value. The <br />include the maximum and/or minunw <br />noted daily maximum imttatton for th <br />6. "Dissolved (D) metals fraction" is deft <br />water and suspended sediment samp] <br />dissolved" constituents are made usu <br />through [he membrane filter as welt as <br />for this parameter shall be applied as an instantaneous maximum (or, for H or DO <br />is value is defined as the analytical result of any individual sample. Dt~1Rs shall <br />[antaneous values within the calendar month. Any instantaneous value beyond the. <br />parameter shall be considered a violation of this permit. <br />tasic Standards and Methodolo ies for Surface Water 1002-31, as that portion of a <br />sse oug a or mtcron, mein rane filter. Determinations of <br />~. This may include some very sma ] (colloidal) suspended particles which passed <br />of snbsrance present in [rue chemical solution. <br />7. "Grab" sample, is a single "dip and take" sample so as to be representative ofthe parameter being monitored. <br />8. "In-sim" measwement is defined as a single reading, observation or measurement taken in the field at the point of discharge. <br />9. "Instantaneous" measurement is a single reading, observation, or measurement performed on site using existing monitoring facilities. <br />10. "Potentially dissolved (PD) metals fraction" is defined in the Basic Standards and Methodologies for Surface Water 1002-31, as that <br />portion of a constituent measwed from the filtrate of a water an su~spend~ se unen samp e a was us ea e with nitric acid to a <br />pH of 2. or less and let stand for 8 to 96 hours nor to sample f Ifratmn usm a 0.40 or 0.45-UM micron)) membrane filter. Note the <br />potentially dissolved" method cannot be usedpwhere mtrlc and will interfere with the analytica4 procedwe used for the constituent <br />measwed. <br />11. "Quarterly measwement freqquency" means samples may be collected at any time dwing the calendar quarter if a continual discharge <br />occurs. It the discharge is internrtttent, then samples shall be collected during the period [hat discharge occws. <br />12. "Recorder" requires the continuous operation of a chart and/or totalizer (or drinking water rotor meters or pump hour meters where <br />previously approved.) <br />~ODIFIED AND EFFECTIVE: AUGUST 12, 2005 EXPIRATION: FEBRUARY 29, 2010 <br />Ro°;~od xnRnnns <br />