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PART I <br />Page 2 of 19 <br />C. FC1dINC7IES - APPLICABLE TU PRECIDING PAC;FS <br />i ~ - ate thirty (30) day average shall be derp*+~i*+~ by the arithmetic <br />mean of all samples collected during a thirty (30) oor>secutive~]ay <br />period. Samples shall not be used for more than tale (1) reporting <br />period. (Not applicable to fecal ooliform determiraticaLS -see <br />footnote a,/.) <br />- ate seven (7) day average shall be det~~i*~ by the arithmetic mean <br />of all samples taken in a seven (7) day period. Samples may not be <br />used for more than one (1) reporting period. (Not applicable to <br />fecal coliform detPr*~i*+ations -see footnote ~/.) <br />~ - orris limitation shall be det .m; by a single sample or set of <br />samples as required by Part I.B., Sample Zype. <br />cJl/ - F~ten the measurement frequency indicated is quarterly, the samples <br />shall be wllected during March, Jame, September and De~bas, if a <br />continual discltazge OCCl1r5. If the diG^harae is ;*+rp*m;ttent, then <br />samples shall be collected during the period that disd~a=ge occurs. <br />If the permittee, using the approved analytical methods, monitors <br />any 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 in the Discharge Monitoring Report <br />Form or other forms as required by the Division. Such irrrsaac,xi <br />frequency shall also be indicated. <br />~..~ e~/ - Definitions of Sample 7~pe <br />1. A "caq?osite" Sample, for monitoring rf~l~;ramante, yS g mini,mm, <br />of four (4) grab samples ~llected at equally spaced two (2) <br />hour intervals a~ proportioned ao~zdisg to flow. <br />2. A "grab" sample, for monitoring rpq~ii*+~+P*+ts, is a single "dip <br />and take" sample. <br />3. An "1n5t3i1tanleOUS° IDea511T'emEnt, for monitoring per,;rpnwnra, 15 <br />a single reading, observation, or mawc„r,Pma*,* performed cat site. <br />4. A "continuous" measur~ementt, for flow monitoring requissrents, is <br />a meascuBOent nt+ra i *+~ from an auta:iatic reconiirg device which <br />ccttinually measures flora. <br />5. A "visual" obserration, for oil and grease monitoring <br />requirements, is observing the disdta=ge to check for the <br />presence of a visible sheen or floating oil. <br />6. An "in-situ" measurement, for monitoring requi^~^r~, is <br />defined as a single reading, observation or aieasuxemertt taken in <br />the field at the point of discharge. <br />Code: i - 16 Date: 1-84, revised 10-88, revised 12-88 <br />i <br />