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<br />PART I <br />Page 4a of 16 <br />Permit No.: CU-0032638 <br />~A. TERP15 AND CONDITIONS (Continued) <br />5. Footnotes <br />a/ This limitation shall be determined by the arithmetic mean of a <br />minimum of three samples collected in separate calendar weeks <br />during a 30-day consecutive period with a minimum of 20 days <br />occurring between the first and last sample days. <br />b/ This limitation shall be determined by a single properly <br />preserved sample as required under monitoring <br />requirements-Sample Type. <br />c/ Ponitoring is required only during periods of discharge. If "no <br />discharge" occurs, this shall be reported at the specified <br />frequency. (See Part B) <br />d/ Should a discharge occur due to snowmelt or a rainfall event, <br />sampling of all parameters shall be done as a minimum at the <br />beginning and at [he end of the discharge. <br />e/ See definitions, Part $. <br />f/ When the measurement frequency indicated is quarterly, the <br />samples shall be collected during March, June, September, and <br />• December if a continual discharge occurs. If the discharge is <br />intermi[tant, then samples shall be collected during the period <br />that discharge occurs. <br />~/ Salinity shall be measured as Total Dissolved Solids (TDS) or <br />electrical conductivity where a satisfactory correlation with <br />TDS has been established to the satisfaction of the k~ater <br />Quality Control Division, based on a minimum of five (5) <br />samples. Samples shall be taken at the permitted discharge <br />point. <br />h/ Salinity shall be sampled on a monthly basis i7t~ti1 six samples <br /> have been analyzed. Thereafter, monitoring shall continue on a <br /> quarterly basis. Following submittal of the first six montns of <br /> data, the Division shall determine eligibility of a waiver of <br /> numeric limitations based on salt-loading. If a waiver is not <br /> granted, the permittee has an additional six months to submit a <br /> report addressing salt removal in accordance with kcgula[ions <br /> 3.10.0-3.10.5 and Appendix A. <br />i/ Procedure for determining settleable solids is contained in 40 <br /> CFR 434.64. I'he method detection limit for measuring settleable <br /> solids under this part shall be 0.4 ml/1. <br />j <br />/ Should a precipitation event occur which is greater titan [he <br />. 10-year, 24-hour even[, the permittce shall submit rain gauge or <br />• other appropriate documentation in order for an exemption to be <br />_ clair..~d. In lieu of such documentation, limitations contained <br />_ in Part L. A.l.b., shall apply. Documentation shall be reported <br /> as an attachment to the Discharge Monitoring Report (D:1R1 for <br /> [he appropriate period. Amended h~oh 3 fQ~~ <br />~""=2`(J <br />Coal-3/83 <br />