(a) Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart must continue achieving the standards for cyanide specified in paragraph (c) of this section and must achieve the following standards by September 21, 2001:
Pretreatment Standards (PSES)------------------------------------------------------------------------
Maximum
Maximum monthly
Regulated parameter daily \1\ average
\1\------------------------------------------------------------------------Ammonia (as N) \2\............................... 84.1 29.4Acetone.......................................... 20.7 8.24-methyl-2-pentanone............................. 20.7 8.2Isobutyraldehyde................................. 20.7 8.2n-Amyl acetate................................... 20.7 8.2n-Butyl acetate.................................. 20.7 8.2Ethyl acetate.................................... 20.7 8.2Isopropyl acetate................................ 20.7 8.2Methyl formate................................... 20.7 8.2Isopropyl ether.................................. 20.7 8.2Tetrahydrofuran.................................. 9.2 3.4Benzene.......................................... 3.0 0.7Toluene.......................................... 0.3 0.2Xylenes.......................................... 3.0 0.7n-Heptane........................................ 3.0 0.7n-Hexane......................................... 3.0 0.7Methylene chloride............................... 3.0 0.7Chloroform....................................... 0.1 0.031,2-dichloroethane............................... 20.7 8.2Chlorobenzene.................................... 3.0 0.7o-Dichlorobenzene................................ 20.7 8.2Diethyl amine.................................... 255.0 100.0Triethyl amine................................... 255.0 100.0------------------------------------------------------------------------\1\ mg/L (ppm)\2\ Not applicable to sources that discharge to a POTW with
nitrification capability.
(b) Sources that discharge to a POTW with nitrification capability (defined at Sec. 439.1(i)) are not required to achieve the pretreatment standard for ammonia (as N).
(c) The limitations for cyanide are the same as specified in Sec. 439.12(e), (f) and (g). [68 FR 12272, Mar. 13, 2003]