[Code of Federal Regulations]
[Title 40, Volume 5, Parts 53 to 59]
[Revised as of July 1, 2000]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR57.404]
[Page 147-148]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY
PART 57--PRIMARY NONFERROUS SMELTER ORDERS--Table of Contents
Subpart D--Supplementary Control System Requirements
Sec. 57.404 Measurements, records, and reports.
(a) Measurements. Each NSO shall require the smelter owner to
install, operate, and maintain a measurement system(s) for continuously
monitoring sulfur dioxide emissions and stack gas volumetric flow rates
in each stack (except a stack used exclusively for bypassing control
equipment) which could emit 5 percent or more of the smelter's total
potential (uncontrolled) hourly sulfur dioxide emissions.
(1) Such monitors shall be installed, operated, and maintained in
accordance with the performance specifications and other requirements
contained in appendices D and E to 40 CFR part 52. The monitors must
take and record at least one measurement of sulfur dioxide concentration
and stack gas flow rate from the effluent of each affected stack in each
fifteen-minute period. (The NSO shall require the smelter operator to
devise and implement any procedures necessary for compliance with these
performance specifications.)
(2) The sampling point shall be located at least eight stack
diameters (diameter measured at sampling point) downstream and two
diameters upstream from any flow disturbance such as a bend, expansion,
constriction, or flame, unless another location is approved by the
Administrator.
(3) The sampling point for monitoring emissions shall be in the duct
at the centroid of the cross section if the cross sectional area is less
than 4.645 m2 (50 ft 2) or at a point no closer to
the wall than 0.914m (3 ft) if the cross sectional area is 4.645
m2 (50 ft2) or more. The monitor sample point
shall be in an area of small spatial concentration gradient and shall
provide a sample which is representative of the concentration in the
duct.
(4) The measurement system(s) installed and used pursuant to this
paragraph shall be subject to the manufacturer's recommended zero
adjustment and calibration procedures at least once per 24-hour
operating period unless the manufacturer specifies or recommends
calibration at shorter intervals, in which case such specifications or
recommendations shall be followed. Records of these procedures shall be
made which clearly show instrument readings before and after zero
adjustment and calibration.
(5) The results of such monitoring, calibration, and maintenance
shall be submitted in the form and with the frequency specified in the
NSO.
(b) Records. Each NSO shall require the smelter owner to maintain
records of the air quality measurements made, meteorological information
acquired, emission curtailment ordered (including the identity of the
persons making such decisions), and calibration and maintenance
performed on SCS monitors during the operation of the SCS. These records
shall be maintained for the duration of the NSO.
(c) Reports. Each NSO shall require the smelter owner to:
(1) Submit a monthly summary indicating all places and times at
which the NAAQS for SO2 were violated in the smelter's DLA,
and stating the SO2 concentrations at such times;
(2) Immediately notify EPA and the State agency any time
concentrations of SO2 in the ambient air in the smelter's DLA
reaches 0.3 part per million (800 micrograms/cubic meter), 24-hour
[[Page 148]]
average, or exceed the warning stage in any more stringent emergency
plan in the applicable State Implementation Plan; and
(3) Make such other reports as may be specified in the NSO.