Section R18-9-A906. General Pretreatment Regulations for Existing and New Sources of Pollution

A.      The reduction or alteration of a pollutant may be obtained by physical, chemical, or biological processes, process changes, or by other means, except as prohibited under 40 CFR 403.6(d), which is incorporated by reference in R18-9- A905(A)(8)(b). Appropriate pretreatment technology includes control equipment, such as equalization tanks or facilities, for protection against surges or slug loading that might interfere with or otherwise be incompatible with the POTW. However, if wastewater from a regulated process is mixed in an equaliza- tion facility with unregulated wastewater or with wastewater from another regulated process, the effluent from the equaliza- tion facility shall meet an adjusted pretreatment limit calcu- lated under 40 CFR 403.6(e), which is incorporated by reference in R18-9-A905(A)(8)(b).

B.       Pretreatment applies to:

1.        Pollutants from non-domestic sources covered by pre- treatment standards that are indirectly discharged, trans- ported by truck or rail, or otherwise introduced into POTWs;

2.        POTWs that receive wastewater from sources subject to national pretreatment standards; and

3.        Any new or existing source subject to national pretreat- ment standards.

C.      National pretreatment standards do not apply to sources that discharge to a sewer that is not connected to a POTW.

D.      For purposes of this Section the terms “National Pretreatment Standard” and “Pretreatment Standard” mean any regulation

containing pollutant discharge limits promulgated by EPA under section 307(b) and (c) of the Clean Water Act (33 U.S.C. 1317), which applies to Industrial Users. This term includes prohibitive discharge limits established under 40 CFR 403.5.

Historical Note

New Section made by final rulemaking at 7 A.A.R. 5879, effective December 7, 2001 (Supp. 01-4).