[Code of Federal Regulations]
[Title 40, Volume 8]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR61.347]

[Page 202-203]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 61_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
--Table of Contents
 
   Subpart FF_National Emission Standard for Benzene Waste Operations
 
Sec. 61.347  Standards: Oil-water separators.

    (a) Except as provided in Sec. 61.352 of this subpart, the owner or 
operator shall meet the following standards for each oil-water separator 
in which waste is placed in accordance with Sec. 61.342(c)(1)(ii) of 
this subpart:
    (1) The owner or operator shall install, operate, and maintain a 
fixed-roof and closed-vent system that routes all organic vapors vented 
from the oil-water separator to a control device.
    (i) The fixed-roof shall meet the following requirements:
    (A) The cover and all openings (e.g., access hatches, sampling 
ports, and gauge wells) shall be designed to operate with no detectable 
emissions as indicated by an instrument reading of less than 500 ppmv 
above background, as determined initially and thereafter at least once 
per year by the methods specified in Sec. 61.355(h) of this subpart.
    (B) Each opening shall be maintained in a closed, sealed position 
(e.g., covered by a lid that is gasketed and latched) at all times that 
waste is in the oil-water separator except when it is necessary to use 
the opening for waste sampling or removal, or for equipment inspection, 
maintenance, or repair.
    (C) If the cover and closed-vent system operate such that the oil-
water separator is maintained at a pressure less than atmospheric 
pressure, then paragraph (a)(1)(i)(B) of this section does not apply to 
any opening that meets all of the following conditions:
    (1) The purpose of the opening is to provide dilution air to reduce 
the explosion hazard;
    (2) The opening is designed to operate with no detectable emissions 
as indicated by an instrument reading of less than 500 ppmv above 
background, as determined initially and thereafter at least once per 
year by the methods specified in Sec. 61.355(h); and
    (3) The pressure is monitored continuously to ensure that the 
pressure

[[Page 203]]

in the oil-water separator remains below atmospheric pressure.
    (ii) The closed-vent system and control device shall be designed and 
operated in accordance with the requirements of Sec. 61.349 of this 
subpart.
    (b) Each cover seal, access hatch, and all other openings shall be 
checked by visual inspection initially and quarterly thereafter to 
ensure that no cracks or gaps occur between the cover and oil-water 
separator wall and that access hatches and other openings are closed and 
gasketed properly.
    (c) Except as provided in Sec. 61.350 of this subpart, when a 
broken seal or gasket or other problem is identified, or when detectable 
emissions are measured, first efforts at repair shall be made as soon as 
practicable, but not later than 15 calendar days after identification.

[55 FR 8346, Mar. 7, 1990, as amended at 58 FR 3098, Jan. 7, 1993]