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PAR r L <br />Page 2 of 19 <br />• C. FOpTNOTES - APPLICABLE TO PRECEDING PACES <br />a_/ - The thirt)• (3U) day average shall be determined by the arithmetic mean of <br />three (3) samples collected in separate calendar weeks during a thirty <br />(30) consecutive-day peribd with a minimum of 20 days occurring between <br />the first and last sample days. <br />b/ - The seven (7) day average shall be determined by the arithmetic mean of a <br />minimum of three samples taken on separate days in a seven (7) day period. <br />c/ - This limitation shall be determined by a single sample es required by <br />Part I.B. Sample Type. <br />d_/ - Nhen the measurement frequency indicated la quarterly, the samples shall <br />be collected during March, June, September and December, if a continual <br />discharge occurs. If the discharge is intermittent, then samples shall <br />be collected during the period that discharge occurs. If the permittee, <br />using the approved analytical methods, monitors any parameter more <br />frequently than required by this permit, then the results of such <br />monitoring shall be included in the calculation and reporting of the <br />values required in the Discharge Monitoring Report Form or other forms as <br />required by the Division. Such increased frequency shall also be <br />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. An "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 didcharge to check for the presence of a visible <br />sheen or floating oil. <br />6. An "in-situ" measurement, for monitoring requirements, is defined as <br />a single reading, observation or measurement taken in the field at <br />the point of discharge. <br />C~ <br />Code: i - 16 Date:-1_- 84 <br />7-6-10 <br />