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rage ~ a to <br />C. FOOTNOTES <br />7. A "24 hour composite" sample is a eoflbination of at least eight <br />~• (8) sample aliquots of ac least 100 milliliters, collected at <br />equally spaced rotsr•rals during the operating hours of a :acillcy <br />over a txenty-Four (24) hour period. For valaclle pollutants, <br />aliquots must be combined in the laboratory immediately before <br />analysis. She composite must be floe proportional; either the <br />floe interval becxeen each aliquot ar the volume mf each aliquot <br />oust be proportional to either the wastewater or effluent floe ac <br />the time of sampling or toe to cal xascevacer or e=_Lueat `_Low <br />since the collection of the previous a L'auot. P1lquocs may be <br />collected manually or autonacically. <br />f/ - In the event an oil sheen, or floating oil is observed, a grab sample <br />shall be collected, analyzed, and reported on the appropciace D:*~. <br />Ia addition, corrective action shall be taken Sraedlacely to mitigate <br />the discharge of ail and grease. ?. description of the corrective <br />action taken should be Lncluded with the D!L-;. <br />~/ - LR:ere based on a minimum o2 5 samples, the permittee demonstrates, to <br /> • the satisfaction of the Water Quallcy Control Division, that the <br /> level of focal dissolved solids (TDS) in the effluent can be <br /> calculated based upon the level of electrical conductivity, the <br /> permittee may measure and report ?DS is lets of electrical <br /> conductivity. <br />h/ <br />~• - TDS shall be sampled on a monthly basis uat11 sis samples have been <br />analyzed. A repot[ of "No Discharge" shall not be counted as one of <br /> the sis samples. Thereafter, monitoring shall continue an a <br /> quarterly basis. Following submittal of the initial sis secs of <br /> monthly data, the Division shall deCe:mine ~~echer the permittee Ss <br /> required to submit a repot: addressing salt removal is accordance <br /> xich 3egulations for Implementation of the Colorado Rive: SaLnity <br /> Standards Through the NPDES Permit Program, 3.10.0. If the salinity <br /> report is required, the Division shall so advise the permittee by <br /> letter and the report shall be submitted xithia 180 days. <br />1/ - This parameter Ss sub~ec: to "Noneompllanee Notifieacioa" <br /> requirements of Part II.A.3.(b)(v) of this percir. <br />~/ - Procedure for determining settleable solids is contained is 40 CFR <br />• 434.64. The method detection limit for measuring settleable solids <br /> under this past aha11 be 0.4 n'_ll. <br />k/ - Should a precipitaciaa event occur which is greater than the 10-year, <br /> 24-hour event, Ghe peralctee shall submit coin gauge or other <br /> appropriate documentation in order Far an esempcion to be ela±med. <br /> In lieu of such docueeatatloa, 11m1cacioos eontalaed in Par: <br /> I.A.1.(b), shall apply, Dacumeacatian shall be reported as an <br /> a:taehment co the Discharge Hoaicariag Repot: For the appropriate <br /> period. <br />~• Code: i - 16 Date: 1-84, revised 10-88, revised 12-88 <br />