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<br />PART I <br />Page 8 <br />Permit No. COG-850000 <br />B. EFFLUENT LIMITATIONS AND MONITORING REQUIRF,MENTS <br />3. Footnotes (applicable to preceding pages) <br />a/ - The thirty (30) day average shall be determined by the arithmetic <br />mean of all samples collected during a thirty C30) consecutive-day <br />period. Samples shall not be used for more than one reporting <br />period. <br />b/ - The seven (7) day average shall be determined by the arithmetic <br />mean of all samples taken on separate days in a seven (7) <br />consecutive-day period. Samples shall not be used for more than <br />one reporting period. <br />c/ - This limitation shall be determined by a single sample or set of <br />samples as required by Part 1 B. 2, Sample Type. <br />d/ - When the measurement frequency indicated is quarterly, the samples <br />shall be collected during March, June, September and December, if <br />a continual discharge occurs. If the discharge is intermittent, <br />then samples shall be collected during the period that discharge <br />occurs. If the permittee, using the approved analytical methods, <br />monitors any parameter mote frequently than required by this <br />permit, then the results of such monitoring shall be included in <br />the calculation and reporting of the values required in the <br />Discharge Monitoring Report Form or other forms as required by the <br />Division. Such increased frequency shall also be indicated. <br />e/ - Definitions of Sample Type <br />1. A "composite" sample, for monitoring requirements, is a <br />minimum of four (4) grab samples collected at equally spaced <br />two (2) hour intervals and proportioned according to flow. <br />2. A "grab" sample, for monitoring requirements, ie a single "dip <br />and take" sample. , <br />3. Aa "instantaneous" measurement, for monitoring requirements, <br />is a single reading, observation, or measurement performed on <br />site. <br />4. A "continuous" measurement, for flow monitoring requirements, <br />is a measurement obtained from an automatic recording device <br />which continually measures flow. <br />