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<br />PART I <br />Page 3 of 19 <br />C. FOOTNOTES (Continued) <br />f/ - In the event an oil sheen is observed, a grab sample shall be <br />collected, analyzed, and reported. In addition, corrective action <br />shall be taken immediately to mitigate the discharge of oil and grease. <br />~/ - Salinity shall be measured as Total Dissolved Solids (TDS). Where <br />based on a minimum of 5 samples, the permittee demonstrates, to the <br />satisfaction of the Water Quality Control Division, that the level of <br />TDS in the effluent can be calculated based upon the level of <br />electrical conductivity, the permittee may measure and report salinity <br />in terms of electrical conductivity. <br />h/ - Salinity shall be sampled on a monthly basis until six samples have <br />been analyzed. A report of "No Discharge" shall not be counted as one <br />of the six sampled. Thereafter, monitoring shall continue on a <br />quarterly basis. Following submittal of initial six sets of monthly <br />data, the Division shall determine whether the permittee is required to <br />submit a report addressing salt removal in accordance with Regulations <br />For Implementation of the Colorado River Salinity Standards Through <br />the NPDES Permit Program 3.10.0. If the salinity report is required, <br />the Division shall so advise the permittee by letter and the report <br />shall be submitted within 180 days. <br />i/ - This parameter is subject to "Noncompliance Notification" requirements <br />of Part II.A.3.b.v of this permit. <br />j/ - Procedure for determining settleable solids is contained in 40 CFR <br />434.64. The method detection limit for measuring settleable solids <br />under this part shall be 0.4 ml/1. <br />k/ - Should a precipitation event occur which is greater than the 10-year, <br />24-hour event, the permittee shall submit rain gauge or other <br />appropriate documentation in order for an exemption to be claimed. In <br />lieu of such documentation, limitations contained in Part I.A.1(b), <br />shall apply. Documentation shall be reported as an attachment to the <br />Discharge Monitoring Report (D[iFt) for the appropriate period. <br />1/ - When the most sensitive analytical method which complies with Part <br />I.F.2 of the permit has a detection limit greater than the permit <br />limit, the permittee shall report less than the detectable limit, as <br />appropriate. Such reports shall not be considered as violations of the <br />permit limit. <br />m/ - Fecal coliform bacteria average concentrations shall be determined by <br />the geometric mean of all samples collected during a thirty (30) <br />consecutive day period. The 7 day average shall be determined by the <br />geometric mean of all samples taken during a seven (7) day period. <br />Code: i - 17 Date: 9 - 84 <br />Revised 10(86 <br />