Effluent monitoring where permit limitations are not required

Where the discharge is new or where the C95 concentration does not exhibit reasonable potential and less than ten data points are available to characterize an effluent distribution, effluent monitoring for a limited period may be required so that reasonable potential may be reevaluated. (1) Existing discharges. C95(M) is determined according to Equation I-9. C95(M) is used in place of C95 in the various reasonable potential equations, and if reasonable potential is exhibited using C95(M), effluent monitoring is required as a permit condition. The monitoring frequency must be sufficient to provide at least ten data points over a period of three months to one year. (2) New discharges. C95(M) is determined based on the estimated maximum effluent concentration for a substance according to Equation I-9. If reasonable potential is exhibited using C95(M), effluent monitoring is required as a permit condition in the same manner as for existing discharges.