[Code of Federal Regulations]
[Title 40, Volume 19]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR129.104]

[Page 350-352]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 129--TOXIC POLLUTANT EFFLUENT STANDARDS--Table of Contents
 
     Subpart A--Toxic Pollutant Effluent Standards and Prohibitions
 
Sec. 129.104  Benzidine.

    (a) Specialized definitions. (1) Benzidine Manufacturer means a 
manufacturer who produces benzidine or who produces benzidine as an 
intermediate product in the manufacture of dyes commonly used for 
textile, leather and paper dyeing.
    (2) Benzidine-Based Dye Applicator means an owner or operator who 
uses benzidine-based dyes in the dyeing of textiles, leather or paper.

[[Page 351]]

    (3) The ambient water criterion for benzidine in navigable waters is 
0.1 [mu] g/l.
    (b) Benzidine manufacturer--(1) Applicability. (i) These standards 
apply to:
    (A) All discharges into the navigable waters of process wastes, and
    (B) All discharges into the navigable waters of wastes containing 
benzidine from the manufacturing areas, loading and unloading areas, 
storage areas, and other areas subject to direct contamination by 
benzidine or benzidine-containing product as a result of the 
manufacturing process, including but not limited to:
    (1) Stormwater and other runoff except as hereinafter provided in 
paragraph (b)(1)(ii) of this section, and
    (2) Water used for routine cleanup or cleanup of spills.
    (ii) These standards do not apply to stormwater runoff or other 
discharges from areas subject to contamination solely by fallout from 
air emissions of benzidine; or to stormwater runoff that exceeds that 
from the ten year 24-hour rainfall event.
    (2) Analytical method acceptable--Environmental Protection Agency 
method specified in 40 CFR part 136.
    (3) Effluent standards--(i) Existing sources. Discharges from a 
benzidine manufacturer shall not contain benzidine concentrations 
exceeding an average per working day of 10 [mu] g/l calculated over any 
calendar month, and shall not exceed a monthly average daily loading of 
0.130 kg/kkg of benzidine produced, and shall not exceed 50 [mu] g/l in 
a sample(s) representing any working day.
    (ii) New sources. Discharges from a benzidine manufacturer shall not 
contain benzidine concentrations exceeding an average per working day of 
10 [mu] g/l calculated over any calendar month, and shall not exceed a 
monthly average daily loading of 0.130 kg/kkg of benzidine produced, and 
shall not exceed 50 [mu] g/l in a sample(s) representing any working 
day.
    (4) The standards set forth in this paragraph (b) shall apply to the 
total combined weight or concentration of benzidine, excluding any 
associated element or compound.
    (c) Benzidine-based dye applicators--(1) Applicability. (i) These 
standards apply to:
    (A) All discharges into the navigable waters of process wastes, and
    (B) All discharges into the navigable waters of wastes containing 
benzidine from the manufacturing areas, loading and unloading areas, 
storage areas, and other areas subject to direct contamination by 
benzidine or benzidine-containing product as a result of the 
manufacturing process, including but not limited to:
    (1) Stormwater and other runoff except as hereinafter provided in 
paragraph (c)(1)(ii) of this section, and
    (2) Water used for routine cleanup or cleanup of spills.
    (ii) These standards do not apply to stormwater runoff or other 
discharges from areas subject to contamination solely by fallout from 
air emissions of benzidine; or to stormwater that exceeds that from the 
ten year 24-hour rainfall event.
    (2) Analytical method acceptable. (i) Environmental Protection 
Agency method specified in 40 CFR part 136; or
    (ii) Mass balance monitoring approach which requires the calculation 
of the benzidine concentration by dividing the total benzidine contained 
in dyes used during a working day (as certified in writing by the 
manufacturer) by the total quantity of water discharged during the 
working day.

[Comment: The Regional Administrator (or State Director, if appropriate) 
shall rely entirely upon the method specified in 40 CFR part 136 in 
analyses performed by him for enforcement purposes.]

    (3) Effluent standards--(i) Existing sources. Discharges from 
benzidine-based dye applicators shall not contain benzidine 
concentrations exceeding an average per working day of 10 [mu] g/l 
calculated over any calendar month; and shall not exceed 25 [mu] g/l in 
a sample(s) or calculation(s) representing any working day.
    (ii) New sources. Discharges from benzidine-based dye applicators 
shall not contain benzidine concentrations exceeding an average per 
working day of 10 [mu] g/l calculated over any calendar month; and shall 
not exceed 25 [mu] g/l in a sample(s) or calculation(s) representing any 
working day.

[[Page 352]]

    (4) The standards set forth in this paragraph (c) shall apply to the 
total combined concentrations of benzidine, excluding any associated 
element or compound.

[42 FR 2620, Jan. 12, 1977]