Laserfiche WebLink
PART I <br />Page 12 <br />• Permit No. COG-850000 <br />B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS <br />4. Footnotes <br />~ - The thirty (30) day average shall be determined by the arithmetic <br />mean 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.B.3., Sample Type. <br />J - When the measurement frequency indicated is quarterly, the <br />samples shall be collected during March, June, September and <br />December, if a continual discharge occurs. If the discharge is <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 Tvpe <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 flow monitoring requirements, <br />is a measurement obtained from an automatic recording device <br />which continually measures flow. <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 />- 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 />J-16 <br />