[Title 40 CFR 60.273]
[Code of Federal Regulations (annual edition) - July 1, 2009 Edition]
[Title 40 - PROTECTION OF ENVIRONMENT]
[Chapter I - ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)]
[Subchapter C - AIR PROGRAMS (CONTINUED)]
[Part 60 - STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES--]
[Subpart Aa - Standards of Performance for Steel Plants: Electric Arc]
[Sec. 60.273 - Emission monitoring.]
[From the U.S. Government Printing Office]


40PROTECTION OF ENVIRONMENT62009-07-012009-07-01false60.273Sec. 60.273PROTECTION OF ENVIRONMENTENVIRONMENTAL PROTECTION AGENCY (CONTINUED)AIR PROGRAMS (CONTINUED)STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES--Standards of Performance for Steel Plants: Electric Arc
Sec. 60.273  Emission monitoring.

    (a) A continuous monitoring system for the measurement of the 
opacity of emissions discharged into the atmosphere from the control 
device(s) shall be installed, calibrated, maintained, and operated by 
the owner or operator subject to the provisions of this subpart.
    (b) For the purpose of reports under Sec. 60.7(c), all six-minute 
periods during which the average opacity is three percent or greater 
shall indicate a period of excess emission, and shall be reported to the 
Administrator semi-annually.
    (c) A continuous monitoring system for the measurement of the 
opacity of emissions discharged into the atmosphere from the control 
device(s) is not required on any modular, multi-stack, negative-pressure 
or positive-pressure fabric filter if observations of the opacity of the 
visible emissions from the control device are performed by a certified 
visible emission observer; or on any single-stack fabric filter if 
visible emissions from the control device are performed by a certified 
visible emission observer and the owner installs and continuously 
operates a bag leak detection system according to paragraph (e) of this 
section. Visible emission observations shall be conducted at least once 
per day for at least three 6-minute periods when the furnace is 
operating in the melting and refining period. All visible emissions 
observations shall be conducted in accordance with Method 9 of appendix 
A to this part. If visible emissions occur from more than one point, the 
opacity shall be recorded for any points where visible emissions are 
observed. Where it is possible to determine that a number of visible 
emission sites relate to only one incident of the visible emission, only 
one set of three 6-minute observations will be required. In that case, 
the Method 9 observations must be made for the site of highest opacity 
that directly relates to the cause (or location) of visible emissions 
observed during a single incident. Records shall be maintained of any 6-
minute average that is in excess of the emission limit specified in 
Sec. 60.272(a).
    (d) A furnace static pressure monitoring device is not required on 
any EAF equipped with a DEC system if observations of shop opacity are 
performed by a certified visible emission observer as follows: Shop 
opacity observations shall be conducted at least once per day when the 
furnace is operating in the meltdown and refining period. Shop opacity 
shall be determined as the arithmetic average of 24 or more consecutive 
15-second opacity observations of emissions from the shop taken in 
accordance with Method 9. Shop opacity shall be recorded for any 
point(s) where visible emissions are observed in proximity to an 
affected EAF. Where it is possible to determine that a number of visible 
emission sites relate to only one incident of visible emissions, only 
one observation of shop opacity will be required. In this case, the shop 
opacity observations must be

[[Page 406]]

made for the site of highest opacity that directly relates to the cause 
(or location) of visible emissions observed during a single incident.
    (e) A bag leak detection system must be installed and continuously 
operated on all single-stack fabric filters if the owner or operator 
elects not to install and operate a continuous opacity monitoring system 
as provided for under paragraph (c) of this section. In addition, the 
owner or operator shall meet the visible emissions observation 
requirements in paragraph (c) of this section. The bag leak detection 
system must meet the specifications and requirements of paragraphs 
(e)(1) through (8) of this section.
    (1) The bag leak detection system must be certified by the 
manufacturer to be capable of detecting particulate matter emissions at 
concentrations of 1 milligram per actual cubic meter (0.00044 grains per 
actual cubic foot) or less.
    (2) The bag leak detection system sensor must provide output of 
relative particulate matter loadings and the owner or operator shall 
continuously record the output from the bag leak detection system using 
electronic or other means (e.g., using a strip chart recorder or a data 
logger.)
    (3) The bag leak detection system must be equipped with an alarm 
system that will sound when an increase in relative particulate loading 
is detected over the alarm set point established according to paragraph 
(e)(4) of this section, and the alarm must be located such that it can 
be heard by the appropriate plant personnel.
    (4) For each bag leak detection system required by paragraph (e) of 
this section, the owner or operator shall develop and submit to the 
Administrator or delegated authority, for approval, a site-specific 
monitoring plan that addresses the items identified in paragraphs (i) 
through (v) of this paragraph (e)(4). For each bag leak detection system 
that operates based on the triboelectric effect, the monitoring plan 
shall be consistent with the recommendations contained in the U.S. 
Environmental Protection Agency guidance document ``Fabric Filter Bag 
Leak Detection Guidance'' (EPA-454/R-98-015). The owner or operator 
shall operate and maintain the bag leak detection system according to 
the site-specific monitoring plan at all times. The plan shall describe:
    (i) Installation of the bag leak detection system;
    (ii) Initial and periodic adjustment of the bag leak detection 
system including how the alarm set-point will be established;
    (iii) Operation of the bag leak detection system including quality 
assurance procedures;
    (iv) How the bag leak detection system will be maintained including 
a routine maintenance schedule and spare parts inventory list; and
    (v) How the bag leak detection system output shall be recorded and 
stored.
    (5) The initial adjustment of the system shall, at a minimum, 
consist of establishing the baseline output by adjusting the sensitivity 
(range) and the averaging period of the device, and establishing the 
alarm set points and the alarm delay time (if applicable).
    (6) Following initial adjustment, the owner or operator shall not 
adjust the averaging period, alarm set point, or alarm delay time 
without approval from the Administrator or delegated authority except as 
provided for in paragraphs (e)(6)(i) and (ii) of this section.
    (i) Once per quarter, the owner or operator may adjust the 
sensitivity of the bag leak detection system to account for seasonal 
effects including temperature and humidity according to the procedures 
identified in the site-specific monitoring plan required under 
paragraphs (e)(4) of this section.
    (ii) If opacities greater than zero percent are observed over four 
consecutive 15-second observations during the daily opacity observations 
required under paragraph (c) of this section and the alarm on the bag 
leak detection system does not sound, the owner or operator shall lower 
the alarm set point on the bag leak detection system to a point where 
the alarm would have sounded during the period when the opacity 
observations were made.
    (7) For negative pressure, induced air baghouses, and positive 
pressure baghouses that are discharged to the atmosphere through a 
stack, the bag

[[Page 407]]

leak detection sensor must be installed downstream of the baghouse and 
upstream of any wet scrubber.
    (8) Where multiple detectors are required, the system's 
instrumentation and alarm may be shared among detectors.
    (f) For each bag leak detection system installed according to 
paragraph (e) of this section, the owner or operator shall initiate 
procedures to determine the cause of all alarms within 1 hour of an 
alarm. Except as provided for in paragraph (g) of this section, the 
cause of the alarm must be alleviated within 3 hours of the time the 
alarm occurred by taking whatever corrective action(s) are necessary. 
Corrective actions may include, but are not limited to the following:
    (1) Inspecting the baghouse for air leaks, torn or broken bags or 
filter media, or any other condition that may cause an increase in 
particulate emissions;
    (2) Sealing off defective bags or filter media;
    (3) Replacing defective bags or filter media or otherwise repairing 
the control device;
    (4) Sealing off a defective baghouse compartment;
    (5) Cleaning the bag leak detection system probe or otherwise 
repairing the bag leak detection system; or
    (6) Shutting down the process producing the particulate emissions.
    (g) In approving the site-specific monitoring plan required in 
paragraph (e)(4) of this section, the Administrator or delegated 
authority may allow owners or operators more than 3 hours to alleviate 
specific conditions that cause an alarm if the owner or operator 
identifies the condition that could lead to an alarm in the monitoring 
plan, adequately explains why it is not feasible to alleviate the 
condition within 3 hours of the time the alarm occurred, and 
demonstrates that the requested additional time will ensure alleviation 
of the condition as expeditiously as practicable.

[40 FR 43852, Sept. 23, 1975, as amended at 49 FR 43843, Oct. 31, 1984; 
54 FR 6672. Feb. 14, 1989; 64 FR 10109, Mar. 2, 1999; 70 FR 8530, Feb. 
22, 2005]