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• PART I <br />Page 2 of 19 <br />C. FOOTNOTES - APPLICABLE TO PRECEDING PAGES <br />a/ - The thirty (30) day average shall be determined by the arithmetic <br /> mean of three (3) samples collected in separate calendar weeks during <br /> a thirty (30) consecutive-day period with a minimum of 20 days <br /> occurring between the first and last sample days. <Not applicable to <br /> fecal coliforms - see footnote n) <br />b/ - The seven (7) day average shall be determined by the arithmetic mean <br /> of a minimum of three samples taken on separate days in a seven (7) <br /> day period. (Not applicable to fecal coliforms - see footnote a/) <br />c/ - This limitation shall be determined by a single sample as required by <br /> Part I.B. Sample Type. <br />d/ - When the measurement frequency indicated is quarterly, the samples <br /> shall be collected during March, June, September and December, if a <br /> continual discharge occurs. If the discharge is intermittent, then <br /> samples shall be collected during the period that discharge occurs. <br /> If the permittee, using the approved analytical methods, monitors any <br /> parameter more frequently than required by this permit, then the <br />• results of such monitoring shall be included in the calculation and <br /> reporting of the values required is the Discharge Monitoring Report <br /> Form or other forms as required by the Division. Such increased <br /> frequency shall also be indicated. <br />e/ - Definitions of Sample Type <br />1. A "composite" sample, for monitoring requirements, is a minimum of <br />four (4) grab samples collected at equally spaced two (2) hour <br />intervals and proportioned according to flow. <br />2. A "grab" sample, for monitoring requirements, is a single "dip and <br />take" sample. <br />3. Aa "instantaneous"`measurement, for monitoring requirements, is a <br />single reading, observation, or measurement performed on site. <br />4. A "continuous" measurement, for flow monitoring requirements, is a <br />measurement obtained from an automatic recording device which <br />continually measures flow. <br />5. A "visual" observation, for oil and grease monitoring requirements, <br />is observing the discharge to check for the presence of a visible <br />sheen or floating oil. <br />~J <br />Code: i - 16 Date: 2 - 84 <br />