Ala. Admin. Code r. 335-6-10-.08 Waste Treatment Requirements

• Library: Alabama Administrative Code
• Edition: 2023
• Currency: Current through Register Vol. 42, No. 3, December 29, 2023
• Year: 2023
• Citation: Ala. Admin. Code r. 335-6-10-.08

The following treatment requirements apply to all industrial waste discharges, sewage treatment plants, and combined waste treatment plants:

(a) As a minimum, secondary treatment, "equivalent to secondary treatment", or alternate levels as provided for in rules and regulations promulgated by the U.S. Environmental Protection Agency at 40 CFR Part 133 (1990), shall be applied to all waste discharges. The term "secondary treatment" is applied to biologically degradable waste and is interpreted to mean a facility which at design flow is capable of removing substantially all floating and settleable solids and to achieve a minimum removal of 85 percent of both the 5-day biochemical oxygen demand and suspended solids which, in the case of municipal wastes, is generally considered to produce an effluent quality containing a BOD5 concentration of 30 mg/1 and a suspended solids concentration of 30 mg/1. Equivalent to secondary treatment and alternate levels shall be defined by the U.S. Environmental Protection Agency at 40 CFR Part 133 (1990). Disinfection, where necessary, will also be required. Waste treatment requirements also include those established under the provisions of Sections 301, 304, 306, and 307 of the Federal Water Pollution Control Act (FWPCA). In addition, the Department may require secondary treatment of biologically degradable industrial wastewaters when the application of guidelines published under federal law do not produce a similar reduction in the parameters of concern. In the application of this requirement, consideration will be given to efficiencies achieved through in-process improvements.

(b) In all cases, an analysis of water use and flow characteristics for the receiving stream shall be provided to determine the degree of treatment required. Where indicated by the analysis, a higher degree of treatment may be required.

(c) The minimum 7-day low flow that occurs once in 10 years shall be the basis for design criteria.

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History: Originally Adopted: May 5, 1967. Amended: June 19, 1967. Amended: July 17, 1972. Amended: February 26, 1973. Amended: May 30, 1977. Amended: December 19, 1977. Amended: February 4, 1981. Amended: Filed January 26, 1990; effective March 2, 1990. Amended: Filed February 27, 1991; effective April 3, 1991. Amended: Filed December 10, 2004; effective January 14, 2005. Amended...