Effluent characterization for determining reasonable potential for effluent

temperature (a) T95. Where there is a thermal component to a discharge, T95 is used to determine reasonable potential. (b) Existing discharges. If a daily maximum effluent temperature distribution is available, then DEQ will determine T95 directly from the untransformed data distribution. If the temperature distribution is unknown, the highest daily maximum effluent temperature is used for T95. A temperature CV of 0.6 is assumed unless the temperature CV is determined from the effluent temperature distribution. (c) New discharges. Permit applicants for new facilities or new discharges at existing facilities must estimate T95 through engineering calculations.