5 Colo. Code Regs. § 1002-71.4
Current through Register Vol. 47, No. 20, October 25, 2024
Section 5 CCR 1002-71.4 - MUNICIPAL AND DOMESTIC EFFLUENT LIMITATIONS(1) No new or existing municipal or domestic wastewater treatment plant treating more than 2,000 gallons per day in the Dillon Reservoir watershed shall discharge an effluent with a total phosphorus concentration greater than 0.5 mg/l total phosphorus, as a daily maximum. In the case of discharges from a dispersal system, this concentration must be documented either entering or leaving the dispersal system. Notwithstanding the discharge allowed by this subsection, the dischargers listed in section 3 shall not discharge more than the amounts listed therein. (2) The total phosphorus discharged in the Dillon Reservoir watershed by municipal sources and domestic sources, as shown in section 3, shall not exceed 1,634.4 pounds per year except as provided in section 5 below.(3) Annual phosphorus allocations for site approvals and permits issued to new facilities after July 30, 1984 shall be based on total phosphorus effluent quality of 0.2 mg/l based on a 30-day average and the design capacity of the treatment plant. However, such allocations may only be used if they are offset by discharge credits for nonpoint source controls obtained pursuant to section 5, below. (4) Subject to the other provisions in Section 71.4 , new or existing wastewater treatment facilities may obtain an additional phosphorus allocation for temporary or permanent use by: a. Controlling nonpoint sources as outlined in Section 71.5(5) below;b. Utilizing available credits in the Reserve Pool; andc. Acquiring credits from another existing point source wasteload allocation, where the existing wasteload allocation is reduced by a corresponding amount.