[7-day, 10-year minimum stream flow (7Q10) + discharger design flow] / discharger design flow
For constituents and their acute criteria listed in 391-3-6-.03(5)(e)(ii), the dilution factor for the calculation of effluent limitations equals:
[1-day, 10-year minimum stream flow (1Q10) + discharger design flow] / discharger design flow
For constituents listed in 391-3-6-.03(5)(e)(iv), the dilution factor equals:
[Annual or long-term average stream flow + Discharger design flow] / discharger design flow
CHEMICAL CONSTITUENT
Effluent limit = criteria concentration X dilution factor X translation factor (if necessary).
The translation factor will be used to convert dissolved criteria concentrations into total recoverable permit limits using methods discussed in 391-3-6-.03(5)(e)(ii). Where a constituent has both an acute and chronic aquatic life criteria, the acute criteria will be used to calculate a daily maximum effluent limitation while the chronic criteria will be used to calculate a monthly average effluent limitation.
Comment: The provisions of this subparagraph do not apply to existing sources which modify their pollution control facilities or construct new pollution control facilities and achieve performance standards, but which are neither new sources nor new dischargers or otherwise do not meet the requirements of this subparagraph.
Comment: The permit application will be revised to incorporate the statement in 391-3-6-.06(5)(g) above. Where a permit program document does not contain the statement, the certification must accompany the appropriate document.
Any discharge authorized by a permit issued pursuant to the Act may be subject to such monitoring, recording and reporting requirements as may be reasonably required by the Director including the installation, use and maintenance of monitoring equipment or methods; specific requirements for recording of monitoring activities and results; and periodic reporting of monitoring results. The monitoring, recording and reporting requirements shall be specified in a permit when issued, provided, however, the Director may require additional monitoring, recording and reporting by written notification to the permittee.
Comment: A new application will be required where the change of ownership is accompanied by a change or proposed change in process or wastewater characteristics or a change or potential change in any circumstances that the Director believes will affect the conditions or restrictions in the permit.
Ga. Comp. R. & Regs. R. 391-3-6-.06
O.C.G.A. § 12-5-20 et seq.