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PART Page 12 of 26 Permit No.:C00000003 achieved by the laboratory)shall be reported on the DMR. For parameters that have a report only limitation,and the permittee's analytical result is less than the PQL,"<X"(where X=the actual PQL achieved by the laboratory)shall be reported on the DMR. Report Only Limits If the permit contains a report only requirement for a parameter,the analytical method and PQL chosen shall be one that can measure at or below the potential numeric effluent limit(s)(maximum allowable pollutant concentration as shown in the WQA or fact sheet). If all analytical methods and corresponding PQLs are greater than the potential numeric effluent limit(s),then the analytical method with the lowest PQL shall be used. When the analytical method which complies with the above requirements has a PQL that is equal to or less than the permit limitation,and the permittee's analytical result is less than the PQL,"<X"(where X=the actual PQL achieved by the laboratory)shall be reported on the DMR. For parameters that have a report only limitation,and the permittee's analytical result is less than the PQL,"<X"(where X=the actual PQL achieved by the laboratory)shall be reported on the DMR. Interim Report Only Followed By a Numeric Limit If the permit contains an interim effluent limitation(a limit is report until such time as a numeric effluent limit becomes effective)for a parameter,the analytical method and PQL chosen for all monitoring conducted in accordance with this permit for the parameter shall be one that can measure to the final numeric effluent limit. If all analytical methods and corresponding PQLs are greater than the final numeric effluent limit(s),then the analytical method with the lowest PQL shall be used. While the report only limit is effective,the reporting requirements shall follow those under the Report Only Limits section. Once the numeric limit is effective,the reporting requirements shall follow the numeric limits reporting requirements. T.I.N. For parameters such as TIN,the analytical methods chosen shall be those that can measure to the potential or final numeric effluent limit,based on the sum of the PQLs for nitrate,nitrite and ammonia. Calculating Averages In the calculation of average concentrations(i.e.daily average,7-day average,30-day average,2-year rolling average)any individual analytical result that is less than the PQL shall be considered to be zero for the calculation purposes. When reporting: If all individual analytical results are less than the PQL,the permittee shall report either"BDL"or"<X"(where X=the actual PQL achieved by the laboratory),following the guidance above. If one or more individual results is greater than the POL,an average shall be calculated and reported. Note that it does not matter if the final calculated average is greater or less than the PQL,it must be reported as a value. Note that when calculating T.I.N.for a single sampling event,any value less than the PQL(for total ammonia,total nitrite,or total nitrate)shall be treated as zero. The T.I.N.concentration for a single sampling event shall then be determined as the sum of the analytical results(zeros if applicable)of same day sampling for total ammonia and total nitrite and total nitrate. From these calculated T.I.N.concentrations,the daily maximum and thirty day average concentrations shall be calculated and must be reported as a value. PQLs The present lowest PQLs for specific parameters,as determined by the State Laboratory(November 2008)are provided below. If the analytical method cannot achieve a PQL that is less than or equal to the permit limit,then the method,or a more precise method,must achieve a PQL that is less than or equal to the PQL in the table below. A listing of the PQLs for organic parameters that must meet the above requirement can be found in the Division's Practical Quantitation Limitation Guidance Document,July 2008. This document is available on the Division's website at www.coloradowate[permits.com.