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i <br />PART I <br />Page 12 <br />Permit No. COG-850000 <br />• <br />B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS <br />4. Footnotes <br />@J - The thirty (30) day average shall be dotarnined by the arithmetic <br />s~ean of all samples collected during a thirty (30) <br />consecutive-day period. Samples shall not be used for more than <br />one reporting period. - <br />~/ - This limitation shall be determined by a single sample or set of <br />samples as required by Part I.8.3., Sample Type. <br />~/ -When the measurement frequency indicated is quarterly, the <br />samples shall be collected during March, Juae, September and <br />December, if a continual discharge occurs. If the discharge ie <br />intermittent, then samples shall be collected during the period <br />that discharge occurs. If the permittee, using the approved <br />analytical methods, monitors any parameter more frequently than <br />required by this permit, then the results of such monitoring <br />shall be included in the calculation and reporting of the values <br />required in the Discharge Monitoring Report Form or other forms <br />as required by the Division. Such increased frequency shall also <br />be indicated. <br />• ~ - Definitions of Sample Type <br />1. A "grab' sample, for monitoring requirements, is a single <br />"dip and take' sample. <br />2. An "instantaneous" measurement, for monitoring requirements, <br />is a single reading, observation, or measurement performed on <br />site. <br />3. A "continuous` measurement, for floe monitoring requirements, <br />is a measurement obtained from an automatic recording device <br />which continually measures floe. <br />4. A "visual" observation, for oil and grease monitoring <br />requirements, is observing the discharge to check for the <br />presence of a visible sheen or floating oil. <br />J - In the event an oil sheen or floating oil is observed, a grab <br />sample shall be collected, analyzed, and reported. In addition, <br />corrective action shall be taken immediately to mitigate the <br />discharge of oil and grease. <br />f/ - Where based on a minimum of 5 samples, the permittee <br />demonstrates, to the satisfaction of the Water Quality Control <br />• Division, that the level of Total Dissolved Solids (TDS) in the <br />effluent can be calculated based upon the level of electrical <br />conductivity, the permittee may measure and report TDS in terms <br />of electrical conductivity. <br />