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PART I <br />Page 9 <br />Permit No. COG-850000 <br />• <br />B. EFFLIIENT LIMITATIONS AND MONITORING REQOIREMENTS <br />3. Footnotes (applicable to preceding pages) <br />e/ -Definitions of Sample Type (Continued) <br />6. An 'in-situ" measurement, for monitoring requirements, is <br />defined as a single reading, observation or measurement taken <br />in the field at the point of discharge. <br />5. A 'visual" observation, for oil and grease monitoring <br />requirements, ie observing the discharge to check for the <br />presence of a visible sheen or floating oil. <br />f/ - In the event an oil sheen or floating oil is observed, a grab <br />sample shall be collected, analyzed, and reported. Ia addition, <br />corrective action shall be taken immediately to mitigate the <br />discharge of oil and grease. <br />$/ - Where based on a minimum of 5 samples, the permit tee demonstrates, <br />to the satisfaction of the Water Quality Control Division, that <br />the level of Total Dissolved Solids (TDS) in the effluent can be <br />calculated based upon the level of electrical conductivity, the • <br />permittee may measure and report TDS in terms of electrical <br />conductivity. <br />h/ - Procedure for determining settleable solids is contained is 40 CFR <br />434.64. The method detection limit for measuring settleable <br />solids under this part shall be 0.4 ml/1. <br />1/ - A new source is generally defined as a coal mine (or major <br />alteration to a coal mine) the construction of which commenced <br />after May 4, 1984. See 40 CFR 434.11(j) for the complete <br />definition. <br />• <br />