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PART I <br />Page 6d of 20 <br />~J <br />C. FOOTNOTES <br />f/ - In the event an oil sheen is observed, a grab sample shall be <br />collected, analyzed, and reported on the appropriate DMR. In <br />addition, corrective action shall be taken immediately to mitigate <br />the discharge of oil and grease. <br />~/ - Where based on a minimum of 5 samples, the permittee demonstrates, to <br />the satisfaction of the Water Quality Control Division, that the <br />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/ - TDS shall be sampled on a monthly basis until six samples have been <br />analyzed. A report of "No Discharge" shall not be counted as one of <br />the six sampled. Thereafter, monitoring shall continue on a <br />quarterly basis. Following submittal of initial six seta of monthly <br />data, the Division shall determine whether the permittee is required <br />to submit a report addressing salt removal in accordance with <br />Regulations For Implementation of the Colorado River Salinity <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 within 180 days. <br />i/ - This parameter is subject to "Noncompliance Notification" <br />requirements of Part II.A.3.b.v of this permit. <br />~/ - 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. <br />In lieu of such documentation, limitations contained in Part <br />I.A.1(b), shall apply. Documentation shall be reported as an <br />attachment to the Discharge Monitoring Report (DMR) for the <br />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 <br />the 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 ttie <br />• geometric mean of all samples taken during a seven (7) day period. <br />Code: i - 17 Date: 9-84, revised 12-87 Amended /~~a-/~$8 <br />