[Code of Federal Regulations]
[Title 40, Volume 11]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR63.1257]
[Page 122-155]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 63--NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES--Table of Contents
Subpart GGG--National Emission Standards for Pharmaceuticals Production
Sec. 63.1257 Test methods and compliance procedures.
(a) General. Except as specified in paragraph (a)(5) of this
section, the procedures specified in paragraphs (c), (d), (e), and (f)
of this section are required to demonstrate initial compliance with
Secs. 63.1253, 63.1254, 63.1256, and 63.1252(e), respectively. The
provisions in paragraphs (a) (2) through (3) apply to performance tests
that are specified in paragraphs (c), (d), and (e) of this section. The
provisions in paragraph (a)(5) of this section are used to demonstrate
initial compliance with the alternative standards specified in
Secs. 63.1253(d) and 63.1254(c). The provisions in paragraph (a)(6) of
this section are used to comply with the outlet concentration
requirements specified in Secs. 63.1253(c), 63.1254 (a)(2)(i) and
(a)(3)(ii)(B), 63.1254(b)(i) and 63.1256(h)(2).
(1) Design evaluation. To demonstrate that a control device meets
the required control efficiency, a design evaluation must address the
composition and organic HAP concentration of the vent stream entering
the control device. A design evaluation also must address other vent
stream characteristics and control device operating parameters as
specified in any one of paragraphs (a)(1) (i) through (vi) of this
section, depending on the type of control device that is used. If the
vent stream is not the only inlet to the control device, the efficiency
demonstration also must consider all other vapors, gases, and liquids,
other than fuels, received by the control device.
(i) For an enclosed combustion device used to comply with the
provisions of 63.1253 (b)(2) or (c)(2), or 63.1256(h)(2)(i)(C) with a
minimum residence time of 0.5 seconds and a minimum temperature of 760
C, the design evaluation must document that these conditions exist.
(ii) For a combustion control device that does not satisfy the
criteria in paragraph (a)(1)(i) of this section, the design evaluation
must document control efficiency and address the following
characteristics, depending on the type of control device:
(A) For a thermal vapor incinerator, the design evaluation must
consider the autoignition temperature of the organic HAP, must consider
the vent stream flow rate, and must establish the design minimum and
average temperature in the combustion zone and the combustion zone
residence time.
(B) For a catalytic vapor incinerator, the design evaluation shall
consider the vent stream flow rate and shall establish the design
minimum and average temperatures across the catalyst bed inlet and
outlet.
(C) For a boiler or process heater, the design evaluation shall
consider the vent stream flow rate; shall establish the design minimum
and average flame zone temperatures and combustion zone residence time;
and shall describe the method and location where the vent stream is
introduced into the flame zone.
(iii) For a condenser, the design evaluation shall consider the vent
stream flow rate, relative humidity, and temperature and shall establish
the design outlet organic HAP compound concentration level, design
average temperature of the condenser exhaust vent
[[Page 123]]
stream, and the design average temperatures of the coolant fluid at the
condenser inlet and outlet. The temperature of the gas stream exiting
the condenser must be measured and used to establish the outlet organic
HAP concentration.
(iv) For a carbon adsorption system that regenerates the carbon bed
directly onsite in the control device such as a fixed-bed adsorber, the
design evaluation shall consider the vent stream flow rate, relative
humidity, and temperature and shall establish the design exhaust vent
stream organic compound concentration level, adsorption cycle time,
number and capacity of carbon beds, type and working capacity of
activated carbon used for carbon beds, design total regeneration stream
mass or volumetric flow over the period of each complete carbon bed
regeneration cycle, design carbon bed temperature after regeneration,
design carbon bed regeneration time, and design service life of carbon.
For vacuum desorption, the pressure drop shall be included.
(v) For a carbon adsorption system that does not regenerate the
carbon bed directly onsite in the control device such as a carbon
canister, the design evaluation shall consider the vent stream mass or
volumetric flow rate, relative humidity, and temperature and shall
establish the design exhaust vent stream organic compound concentration
level, capacity of carbon bed, type and working capacity of activated
carbon used for carbon bed, and design carbon replacement interval based
on the total carbon working capacity of the control device and source
operating schedule.
(vi) For a scrubber, the design evaluation shall consider the vent
stream composition; constituent concentrations; liquid-to-vapor ratio;
scrubbing liquid flow rate and concentration; temperature; and the
reaction kinetics of the constituents with the scrubbing liquid. The
design evaluation shall establish the design exhaust vent stream organic
compound concentration level and will include the additional information
in paragraphs (a)(1)(vi)(A) and (B) of this section for trays and a
packed column scrubber.
(A) Type and total number of theoretical and actual trays;
(B) Type and total surface area of packing for entire column, and
for individual packed sections if column contains more than one packed
section.
(2) Calculation of TOC or total organic HAP concentration. The TOC
concentration or total organic HAP concentration is the sum of the
concentrations of the individual components. If compliance is being
determined based on TOC, the owner or operator shall compute TOC for
each run using Equation 6 of this subpart. If compliance with the
wastewater provisions is being determined based on total organic HAP,
the owner or operator shall compute total organic HAP using Equation 6
of this subpart, except that only the organic HAP compounds shall be
summed; when determining compliance with paragraph (e)(3)(i) of this
section, only the soluble and partially soluble HAP compounds shall be
summed.
[GRAPHIC] [TIFF OMITTED] TR21SE98.003
where:
CGT=total concentration of TOC in vented gas stream,
average of samples, dry basis, ppmv
CGSi,j=concentration of sample components in vented gas
stream for sample j, dry basis, ppmv
i=identifier for a compound
n=number of components in the sample
j=identifier for a sample
m=number of samples in the sample run
(3) Outlet concentration correction for supplemental gases. (i)
Combustion devices. Except as provided in Sec. 63.1258(b)(5)(ii)(A), for a
combustion device used to comply with an outlet concentration standard,
the actual TOC, organic HAP, and hydrogen halide and halogen must be
corrected to 3 percent oxygen if supplemental gases, as defined in Sec.
63.1251, are added to the vent stream or manifold. The integrated
sampling and analysis procedures of Method 3B of 40 CFR part 60,
appendix A, shall be used to determine the actual oxygen concentration
(%O2d). The samples shall be taken during the same time that
the TOC or
[[Page 124]]
total organic HAP or hydrogen halides and halogen samples are taken. The
concentration corrected to 3 percent oxygen (Cd) shall be
computed using Equation 7A of this subpart:
[GRAPHIC] [TIFF OMITTED] TR29AU00.002
Where:
Cc = concentration of TOC or total organic HAP or hydrogen
halide and halogen corrected to 3 percent oxygen, dry basis, ppmv
Cm = total concentration of TOC or total organic HAP or
hydrogen halide and halogen in vented gas stream, average of samples,
dry basis, ppmv
%O2d = concentration of oxygen measured in vented gas stream,
dry basis, percent by volume
(ii) Noncombustion devices. Except as provided in Sec.
63.1258(b)(5)(ii)(B), if a control device other than a combustion device
is used to comply with a TOC, organic HAP, or hydrogen halide outlet
concentration standard, the owner or operator must correct the actual
concentration for supplemental gases using Equation 7B of this subpart;
process knowledge and representative operating data may be used to
determine the fraction of the total flow due to supplemental gas.
[GRAPHIC] [TIFF OMITTED] TR29AU00.003
Where:
Ca = corrected outlet TOC, organic HAP, and hydrogen halides
and halogens concentration, dry basis, ppmv
Cm = actual TOC, organic HAP, and hydrogen halides and
halogens concentration measured at control device outlet, dry basis,
ppmv
Va = total volumetric flow rate of all gas streams vented to
the control device, except supplemental gases
Vs = total volumetric flow rate of supplemental gases
(4) Exemptions from compliance demonstrations. An owner or operator
using any control device specified in paragraphs (a)(4)(i) through (iv)
of this section is exempt from the initial compliance provisions in
paragraphs (c), (d), and (e) of this section.
(i) A boiler or process heater with a design heat input capacity of
44 megawatts or greater.
(ii) A boiler or process heater into which the emission stream is
introduced with the primary fuel.
(iii) A boiler or process heater burning hazardous waste for which
the owner or operator:
(A) Has been issued a final permit under 40 CFR part 270 and
complies with the requirements of 40 CFR part 266, subpart H, or
(B) Has certified compliance with the interim status requirements of
40 CFR part 266, subpart H.
(iv) A hazardous waste incinerator for which the owner or operator
has been issued a final permit under 40 CFR part 270 and complies with
the requirements of 40 CFR part 264, subpart O, or has certified
compliance with the interim status requirements of 40 CFR part 265,
subpart O.
(5) Initial compliance with alternative standard. Initial compliance
with the alternative standards in Secs. 63.1253(d) and 63.1254(c) for
combustion devices is demonstrated when the outlet TOC concentration is
20 ppmv or less, and the outlet hydrogen halide and halogen
concentration is 20 ppmv or less. Initial compliance with the
alternative standards in Secs. 63.1253(d) and 63.1254(c) for
noncombustion devices is demonstrated when the outlet TOC concentration
is 50 ppmv or less, and the outlet hydrogen halide and hydrogen
concentration is 50 ppmv or less. To demonstrate initial compliance, the
owner or operator shall be in compliance with the monitoring provisions
in Sec. 63.1258(b)(5) on the initial compliance date. The owner or operator
shall use Method 18 to determine the predominant organic HAP in the
emission stream if the TOC monitor is calibrated on the predominant HAP.
(6) Initial compliance with the 20 ppmv outlet limit. Initial
compliance with the 20 ppmv TOC and hydrogen halide and halogen
concentration is demonstrated when the outlet TOC concentration is 20
ppmv or less, and the outlet hydrogen halide and halogen concentration
[[Page 125]]
is 20 ppmv or less. To demonstrate initial compliance, the operator
shall use test methods described in paragraph (b) of this section. The
owner or operator shall comply with the monitoring provisions in Sec.
63.1258(b)(1) through (4) on the initial compliance date.
(b) Test methods. When testing is conducted to measure emissions
from an affected source, the test methods specified in paragraphs (b)(1)
through (10) of this section shall be used.
(1) EPA Method 1 or 1A of appendix A of part 60 is used for sample
and velocity traverses.
(2) EPA Method 2, 2A, 2C, or 2D of appendix A of part 60 is used for
velocity and volumetric flow rates.
(3) EPA Method 3 of appendix A of part 60 is used for gas analysis.
(4) EPA Method 4 of appendix A of part 60 is used for stack gas
moisture.
(5) [Reserved]
(6) The following methods are specified for concentration
measurements:
(i) Method 18 may be used to determine HAP concentration in any
control device efficiency determination.
(ii) Method 25 of appendix A of part 60 may be used to determine
total gaseous nonmethane organic concentration for control efficiency
determinations in combustion devices.
(iii) Method 26 or 26A of appendix A of part 60 shall be used to
determine hydrogen chloride, hydrogen halide and halogen concentrations
in control device efficiency determinations or in the 20 ppmv outlet
hydrogen halide concentration standard.
(iv) Method 25A of appendix A of part 60 may be used to determine
the HAP or TOC concentration for control device efficiency
determinations under the conditions specified in Method 25 of appendix A
for direct measurement of an effluent with a flame ionization detector,
or in demonstrating compliance with the 20 ppmv TOC outlet standard. If
Method 25A is used to determine the concentration of TOC for the 20 ppmv
standard, the instrument shall be calibrated on methane or the
predominant HAP. If calibrating on the predominant HAP, the use of
Method 25A shall comply with paragraphs (b)(6)(iv)(A) through (C) of
this section.
(A) The organic HAP used as the calibration gas for Method 25A, 40
CFR part 60, appendix A, shall be the single organic HAP representing
the largest percent by volume.
(B) The use of Method 25A, 40 CFR part 60, appendix A, is acceptable
if the response from the high level calibration gas is at least 20 times
the standard deviation of the response from the zero calibration gas
when the instrument is zeroed on the most sensitive scale.
(C) The span value of the analyzer must be less than 100 ppmv.
(7) Testing conditions for continuous processes. Testing of
emissions on equipment operating as part of a continuous process will
consist of three l-hour runs. Gas stream volumetric flow rates shall be
measured every 15 minutes during each 1-hour run. The HAP concentration
shall be determined from samples collected in an integrated sample over
the duration of each l-hour test run, or from grab samples collected
simultaneously with the flow rate measurements (every 15 minutes). If an
integrated sample is collected for laboratory analysis, the sampling
rate shall be adjusted proportionally to reflect variations in flow
rate. For continuous gas streams, the emission rate used to determine
compliance shall be the average emission rate of the three test runs.
(8) Testing and compliance determination conditions for batch
processes. Testing of emissions on equipment where the flow of gaseous
emissions is intermittent (batch operations) shall be conducted as
specified in paragraphs (b)(8)(i) through (iii) of this section.
(i) Except as provided in paragraph (b)(9) of this section for
condensers, testing shall be conducted at absolute worst-case conditions
or hypothetical worst-case conditions. Gas stream volumetric flow rates
shall be measured at 15-minute intervals. The HAP or TOC concentration
shall be determined from samples collected in an integrated sample over
the duration of the test, or from grab samples collected simultaneously
with the flow rate measurements (every 15 minutes). If an integrated
sample is collected for laboratory analysis, the sampling rate shall be
adjusted proportionally to reflect variations in flow rate. The absolute
worst-case or hypothetical worst-case
[[Page 126]]
conditions shall be characterized by the criteria presented in
paragraphs (b)(8)(i)(A) and (B)of this section. In all cases, a site-
specific plan shall be submitted to the Administrator for approval prior
to testing in accordance with Sec. 63.7(c) and Sec. 63.1260(l). The test plan
shall include the emission profile described in paragraph (b)(8)(ii) of
this section.
(A) Absolute worst-case conditions are defined by the criteria
presented in paragraph (b)(8)(i)(A)(1) or (2) of this section if the
maximum load is the most challenging condition for the control device.
Otherwise, absolute worst-case conditions are defined by the conditions
in paragraph (b)(8)(i)(A)(3) of this section. The owner or operator must
consider all relevant factors, including load and compound-specific
characteristics in defining absolute worst-case conditions.
(1) The period in which the inlet to the control device will contain
at least 50 percent of the maximum HAP load (in lb) capable of being
vented to the control device over any 8 hour period. An emission profile
as described in paragraph (b)(8)(ii)(A) of this section shall be used to
identify the 8-hour period that includes the maximum projected HAP load.
(2) A 1-hour period of time in which the inlet to the control device
will contain the highest HAP mass loading rate, in lb/hr, capable of
being vented to the control device. An emission profile as described in
paragraph (b)(8)(ii)(A) of this section shall be used to identify the 1-
hour period of maximum HAP loading.
(3) The period of time when the HAP loading or stream composition
(including non-HAP) is most challenging for the control device. These
conditions include, but are not limited to the following:
(i) Periods when the stream contains the highest combined VOC and
HAP load, in lb/hr, described by the emission profiles in paragraph
(b)(8)(ii) of this section;
(ii) Periods when the streams contain HAP constituents that approach
limits of solubility for scrubbing media;
(iii) Periods when the streams contain HAP constituents that
approach limits of adsorptivity for carbon adsorption systems.
(B) Hypothetical worst-case conditions are simulated test conditions
that, at a minimum, contain the highest hourly HAP load of emissions
that would be predicted to be vented to the control device from the
emissions profile described in paragraph (b)(8)(ii)(B) or (C) of this
section.
(ii) Emissions profile. The owner or operator may choose to perform
tests only during those periods of the worst-case conditions that the
owner or operator selects to control as part of achieving the required
emission reduction. The owner or operator must develop an emission
profile for the vent to the control device that describes the
characteristics of the vent stream at the inlet to the control device
under worst case conditions. The emission profile shall be developed
based on any one of the procedures described in (b)(8)(ii)(A) through
(C) of this section, as required by paragraph (b)(8)(i).
(A) Emission profile by process. The emission profile must consider
all emission episodes that could contribute to the vent stack for a
period of time that is sufficient to include all processes venting to
the stack and shall consider production scheduling. The profile shall
describe the HAP load to the device that equals the highest sum of
emissions from the episodes that can vent to the control device in any
given hour. Emissions per episode shall be calculated using the
procedures specified in paragraph (d)(2) of this section. Emissions per
episode shall be divided by the duration of the episode only if the
duration of the episode is longer than 1 hour.
(B) Emission profile by equipment. The emission profile must consist
of emissions that meet or exceed the highest emissions, in lb/hr, that
would be expected under actual processing conditions. The profile shall
describe equipment configurations used to generate the emission events,
volatility of materials processed in the equipment, and the rationale
used to identify and characterize the emission events. The emissions may
be based on using a compound more volatile than compounds actually used
in the process(es), and the emissions may be generated from
[[Page 127]]
all equipment in the process(es) or only selected equipment.
(C) Emission profile by capture and control device limitation. The
emission profile shall consider the capture and control system
limitations and the highest emissions, in lb/hr, that can be routed to
the control device, based on maximum flowrate and concentrations
possible because of limitations on conveyance and control equipment
(e.g., fans, LEL alarms and safety bypasses).
(iii) Three runs, at a minimum of 1 hour each and a maximum of 8
hours each, are required for performance testing. Each run must occur
over the same worst-case conditions, as defined in paragraph (b)(8)(i)
of this section.
(9) Testing requirements for condensers. For emission streams
controlled using condensers, continuous direct measurement of condenser
outlet gas temperature to be used in determining concentrations per the
design evaluation described in Sec. 63.1257(a)(1)(iii) is required.
(10) Wastewater testing. Wastewater analysis shall be conducted in
accordance with paragraph (b)(10)(i), (ii), (iii), (iv), or (v) of this
section.
(i) Method 305. Use procedures specified in Method 305 of 40 CFR
part 63, appendix A, and comply with requirements specified in paragraph
(b)(10)(vi) of this section.
(ii) EPA Method 624, 625, 1624, 1625, 1666, or 1671. Use procedures
specified in EPA Method 624, 625, 1624, 1625, 1666, or 1671 of 40 CFR
part 136, appendix A, and comply with requirements in paragraph
(b)(10)(vi) of this section.
(iii) Method 8260 or 8270. Use procedures specified in Method 8260
or 8270 in ``Test Methods for Evaluating Solid Waste, Physical/Chemical
Methods,'' EPA Publication No. SW-846, Third Edition, September 1986, as
amended by Update I, November 15, 1992. As an alternative, an owner or
operator may use any more recent, updated version of Method 8260 or 8270
approved by the EPA. For the purpose of using Method 8260 or 8270 to
comply with this subpart, the owner or operator must maintain a formal
quality assurance program consistent with either Section 8 of Method
8260 or Method 8270, and this program must include the following
elements related to measuring the concentrations of volatile compounds:
(A) Documentation of site-specific procedures to minimize the loss
of compounds due to volatilization, biodegradation, reaction, or
sorption during the sample collection, storage, and preparation steps.
(B) Documentation of specific quality assurance procedures followed
during sampling, sample preparation, sample introduction, and analysis.
(C) Measurement of the average accuracy and precision of the
specific procedures, including field duplicates and field spiking of the
material source before or during sampling with compounds having similar
chemical characteristics to the target analytes.
(iv) Other EPA methods. Use procedures specified in the method,
validate the method using the procedures in paragraph (b)(10)(iv)(A) or
(B) of this section, and comply with the procedures in paragraph
(b)(10)(vi) of this section.
(A) Validate the method according to section 5.1 or 5.3 of Method
301 of 40 CFR part 63, appendix A.
(B) Follow the procedure as specified in ``Alternative Validation
Procedure for EPA Waste Methods'' 40 CFR part 63, appendix D.
(v) Methods other than an EPA method. Use procedures specified in
the method, validate the method using the procedures in paragraph
(b)(10)(iv)(A) of this section, and comply with the requirements in
paragraph (b)(10)(vi) of this section.
(vi) Sampling plan. The owner or operator shall prepare a sampling
plan. Wastewater samples shall be collected using sampling procedures
which minimize loss of organic compounds during sample collection and
analysis and maintain sample integrity. The sample plan shall include
procedures for determining recovery efficiency of the relevant partially
soluble and soluble HAP compounds. An example of an acceptable sampling
plan would be one that incorporates similar sampling and sample handling
requirements to those of Method 25D of 40 CFR part 60, appendix A. The
sampling plan shall be maintained at the facility.
(c) Initial compliance with storage tank provisions. The owner or
operator of an
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affected storage tank shall demonstrate initial compliance with Sec.
63.1253(b) or (c), as applicable, by fulfilling the requirements of
paragraph (c)(1),or (c)(2), or (c)(3) of this section.
(1) Performance test. If this option is chosen to demonstrate
initial compliance with the percent reduction requirement of Sec.
63.1253(b)(1) or (c)(1)(i), the efficiency of the control device shall
be calculated using performance test data as specified in paragraphs
(c)(1)(i) through (iii) of this section. To demonstrate initial
compliance with the outlet concentration requirements in Sec. 63.1253(b)(2)
and (c)(2), the owner or operator must conduct a performance test and
fulfill the requirements of paragraph (a)(6) of this section.
(i) Equations 8 and 9 of this subpart shall be used to calculate the
mass rate of total HAP reasonably expected maximum filling rate at the
inlet and outlet of the control device for standard conditions of 20 C:
where:
[GRAPHIC] [TIFF OMITTED] TR21SE98.005
[GRAPHIC] [TIFF OMITTED] TR21SE98.006
where:
Cij, Coj = concentration of sample component j of
the gas stream at the inlet and outlet of the control device,
respectively, dry basis, ppmv
Ei, Eo = mass rate of total HAP at the inlet and
outlet of the control device, respectively, dry basis, kg/hr
Mij, Moj = molecular weight of sample component j
of the gas stream at the inlet and outlet of the control device,
respectively, gram/gram-mole
Qi, Qo = flow rate of gas stream at the inlet and
outlet of the control device, respectively, dry standard cubic meter per
minute
K2 = constant, 2.494 x 10-6 (parts per million)
-1 (gram-mole per standard cubic meter) (kilogram/gram)
(minute/hour), where standard temperature is 20 C
n = number of sample components in the gas stream
(ii) The percent reduction in total HAP shall be calculated using
Equation 10 of this subpart:
[GRAPHIC] [TIFF OMITTED] TR21SE98.007
where:
R = control efficiency of control device, percent
Ei = mass rate of total HAP at the inlet to the control
device as calculated under paragraph (c)(1)(i) of this section,
kilograms organic HAP per hour
Eo = mass rate of total HAP at the outlet of the control
device, as calculated under paragraph (c)(1)(i) of this section,
kilograms organic HAP per hour
(iii) A performance test is not required to be conducted if the
control device used to comply with Sec. 63.1253 (storage tank provisions)
is also used to comply with Sec. 63.1254 (process vent provisions), and
compliance with Sec. 63.1254 has been demonstrated in accordance with
paragraph (d) of this section.
(2) Design evaluation. If this option is chosen to demonstrate
initial compliance with the percent reduction requirement of Sec.
63.1253(b) or (c), a design evaluation shall be prepared in accordance
with the provisions in paragraph (a)(1) of this section. The design
evaluation shall include documentation demonstrating that the control
device being used achieves the required control efficiency during
reasonably expected maximum filling rate.
(3) Floating roof. If the owner or operator of an affected source
chooses to comply with the provisions of Sec. 63.1253(b) or (c) by
installing a floating roof, the owner or operator shall comply with the
procedures described in Secs. 63.119(b), (c), (d), and 63.120(a), (b),
and (c), with the differences noted in paragraphs (c)(3)(i) through (v)
of this section for the purposes of this subpart.
(i) When the term ``storage vessel'' is used in Secs. 63.119 and
63.120, the definition of ``storage tank'' in Sec. 63.1251 shall apply for
the purposes of this subpart.
(ii) When December 31, 1992 is referred to in Sec. 63.119, April 2,
1997 shall
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apply instead for the purposes of this subpart.
(iii) When April 22, 1994 is referred to in Sec. 63.119, September 21,
1998 shall apply instead for the purposes of this subpart.
(iv) When the phrase ``the compliance date specified in Sec. 63.100 of
subpart F of this part'' is referred to in Sec. 63.120, the phrase ``the
compliance date specified in Sec. 63.1250'' shall apply for the purposes of
this subpart.
(v) When the phrase ``the maximum true vapor pressure of the total
organic HAP's in the stored liquid falls below the values defining Group
1 storage vessels specified in table 5 or table 6 of this subpart'' is
referred to in Sec. 63.120(b)(1)(iv), the phrase ``the maximum true vapor
pressure of the total organic HAP in the stored liquid falls below 13.1
kPa'' shall apply for the purposes of this subpart.
(4) Initial compliance with alternative standard. Initial compliance
with Sec. 63.1253(d) is demonstrated by fulfilling the requirements of
paragraph (a)(5) of this section.
(5) Planned maintenance. The owner or operator shall demonstrate
compliance with the requirements of Sec. 63.1253(e) by including the
periods of planned routine maintenance specified by date and time in
each Periodic Report required by Sec. 63.1260.
(d) Initial compliance with process vent provisions. An owner or
operator of an affected source complying with the process vent standards
in Sec. 63.1254 shall demonstrate compliance using the procedures described
in paragraphs (d)(1) through (4) of this section.
(1) Except as provided in paragraph (a)(4) of this section, initial
compliance with the process vent standards in Sec. 63.1254 shall be
demonstrated using the procedures specified in paragraphs (d)(1)(i)
through (iv), as applicable.
(i) Initial compliance with Sec. 63.1254(a)(2)(i) is demonstrated when
the actual emissions of HAP from the sum of all process vents within a
process is less than or equal to 900 kg/yr. Initial compliance with Sec.
63.1254(a)(2)(ii) is demonstrated when the actual emissions of HAP from
the sum of all process vents in compliance with Sec. 63.1254(a)(2)(i) is
less than or equal to 1,800 kg/yr. Uncontrolled HAP emissions and
controlled HAP emissions shall be determined using the procedures
described in paragraphs (d)(2) and (3) of this section. Controlled
emissions during periods of planned routine maintenance of a CCCD as
specified in Sec. 63.1252(h), must be calculated assuming the HAP emissions
are reduced by 93 percent.
(ii) Initial compliance with the percent reduction requirements in Sec.
63.1254(a)(1)(i), (a)(3), and (b) is demonstrated by:
(A) Determining controlled HAP emissions using the procedures
described in paragraph (d)(3) of this section, and uncontrolled HAP
emissions determined using the procedures described in paragraph (d)(2)
of this section, and demonstrating that the reductions required by Sec.
63.1254(a)(1)(i), (a)(3), and (b) are met; or
(B) Controlling the process vents using a device meeting the
criteria specified in paragraph (a)(4) of this section.
(iii) Initial compliance with the outlet concentration requirements
in Sec. 63.1254(a)(1)(ii)(A), (a)(3), and (b)(1) is demonstrated when the
outlet TOC concentration is 20 ppmv or less and the outlet hydrogen
halide and halogen concentration is 20 ppmv or less. The owner or
operator shall demonstrate compliance by fulfilling the requirements in
paragraph (a)(6) of this section.
(iv) Initial compliance with Sec. 63.1254(c) is demonstrated by
fulfilling the requirements of paragraph (a)(5) of this section.
(2) Uncontrolled emissions. An owner or operator of an affected
source complying with the emission limitation required by Sec.
63.1254(a)(1), or emissions reductions specified in Sec. 63.1254(a)(2),
(a)(3), or (b), for each process vent within a process, shall calculate
uncontrolled emissions from all equipment in the process according to
the procedures described in paragraph (d)(2)(i) or (ii) of this section,
as appropriate.
(i) Emission estimation procedures. Owners or operators shall
determine uncontrolled emissions of HAP using measurements and/or
calculations for each batch emission episode within each unit operation
according to the engineering evaluation methodology in
[[Page 130]]
paragraphs (d)(2)(i)(A) through (H) of this section. Except where
variations are noted, individual HAP partial pressures in multicomponent
systems shall be determined by the following methods: If the components
are miscible in one another, use Raoult's law to calculate the partial
pressures; if the solution is a dilute aqueous mixture, use Henry's law
to calculate partial pressures; if Raoult's law or Henry's law are not
appropriate or available, use experimentally obtained activity
coefficients or models such as the group-contribution models, to predict
activity coefficients, or assume the components of the system behave
independently and use the summation of all vapor pressures from the HAP
as the total HAP partial pressure. Chemical property data can be
obtained from standard reference texts.
(A) Vapor displacement. Emissions from vapor displacement due to
transfer of material shall be calculated using Equation 11 of this
subpart. The individual HAP partial pressures may be calculated using
Raoult's law.
[GRAPHIC] [TIFF OMITTED] TR21SE98.008
where:
E = mass of HAP emitted
V = volume of gas displaced from the vessel
R = ideal gas law constant
T = temperature of the vessel vapor space; absolute
Pi = partial pressure of the individual HAP
MWi = molecular weight of the individual HAP
n = number of HAP compounds in the emission stream i = identifier for a
HAP compound
(B) Purging. Emissions from purging shall be calculated using
Equation 12 of this subpart. The partial pressures of individual
condensable compounds may be calculated using Raoult's law, the pressure
of the vessel vapor space may be set equal to 760 mmHg, and the partial
pressure of HAP shall be assumed to be 25 percent of the saturated value
if the purge flow rate is greater than 100 standard cubic feet per
minute (scfm).
[GRAPHIC] [TIFF OMITTED] TR21SE98.009
Where:
E = mass of HAP emitted
V = purge flow rate at the temperature and pressure of the vessel vapor
space
R = ideal gas law constant
T = temperature of the vessel vapor space; absolute
Pi = partial pressure of the individual HAP
Pj = partial pressure of individual condensable VOC compounds
(including HAP)
PT = pressure of the vessel vapor space
MWi = molecular weight of the individual HAP
t = time of purge
n = number of HAP compounds in the emission stream
i = identifier for a HAP compound
j = identifier for a condensable compound
m = number of condensable compounds (including HAP) in the emission
stream
(C) Heating. Emissions caused by the heating of a vessel to a
temperature equal to or lower than 10 K below the boiling point shall be
calculated using the procedures in either paragraph (d)(2)(i)(C)(1) or
(3) of this section. Emissions caused by heating a vessel to a
temperature that is higher than 10 K below the boiling point and less
than the boiling point, must be calculated using the procedures in
either paragraph (d)(2)(i)(C) (2) or (3) of this section. If the
contents of a vessel are
[[Page 131]]
heated to the boiling point, emissions must be calculated using the
procedures in paragraph (d)(2)(i)(C)(4) of this section.
(1) This paragraph describes procedures to calculate emissions if
the final temperature to which the vessel contents are heated is 10 K
below the boiling point of the HAP in the vessel, or lower. The owner or
operator shall calculate the mass of HAP emitted per episode using
either Equation 13 or 14 of this subpart. The moles of noncondensable
gas displaced are calculated using Equation 15 of this subpart. The
initial and final pressure of the noncondensable gas in the vessel shall
be calculated using Equation 16 of this subpart. The average molecular
weight of HAP in the displaced gas shall be calculated using Equation 17
of this subpart.
[GRAPHIC] [TIFF OMITTED] TR29AU00.004
[GRAPHIC] [TIFF OMITTED] TR21SE98.011
[GRAPHIC] [TIFF OMITTED] TR21SE98.012
[GRAPHIC] [TIFF OMITTED] TR21SE98.013
[GRAPHIC] [TIFF OMITTED] TR21SE98.014
Where:
E = mass of HAP vapor displaced from the vessel being heated
xi = mole fraction of each HAP in the liquid phase
xj = mole fraction of each condensable VOC (including HAP) in
the liquid phase
Pi* = vapor pressure of each HAP in the vessel headspace at
any temperature between the initial and final heatup temperatures, mmHg.
Pj* = vapor pressure of each condensable VOC (including HAP)
in the vessel headspace at any temperature between the initial and final
heatup temperatures, mmHg.
760 = atmospheric pressure, mmHg
MWHAP = the average molecular weight of HAP present in the
displaced gas
[Delta][eta] = number of moles of noncondensable gas displaced
V = volume of free space in the vessel
R = ideal gas law constant
T1 = initial temperature of vessel contents, absolute
T2 = final temperature of vessel contents, absolute
Pan = partial pressure of noncondensable gas in the vessel
headspace at
[[Page 132]]
initial (n=1) and final (n=2) temperature
Patm = atmospheric pressure (when [Delta][eta] is used in
Equation 13 of this subpart, Patm may be set equal to 760
mmHg for any vessel)
(Pj)Tn = partial pressure of each condensable
compound (including HAP) in the vessel headspace at the initial
temperature (n=1) and final (n=2) temperature
m = number of condensable compounds (including HAP) in the displaced
vapor
j = identifier for a condensable compound
(Pi)Tn = partial pressure of each HAP in the
vessel headspace at initial (T1) and final (T2)
temperature
MWi = molecular weight of the individual HAP
n = number of HAP compounds in the emission stream
i = identifier for a HAP compound
(2) If the vessel contents are heated to a temperature that is
higher than 10 K below the boiling point and less than the boiling
point, emissions must be calculated using the procedures in paragraph
(d)(2)(i)(C)(2)(i), or (ii), or (iii) of this section.
(i) Use Equation 13 of this subpart. In Equation 13 of this subpart,
the HAP vapor pressures must be determined at the temperature 10 K below
the boiling point. In the calculation of [Delta][eta] for Equation 13 of
this subpart, T2 must be the temperature 10 K below the
boiling point, and Pa2 must be determined at the temperature
10 K below the boiling point.
(ii) Use Equation 14 of this subpart. In Equation 14 of this
subpart, the HAP partial pressures must be deter mined at the
temperature 10 K below the boiling point. In the calculation of
[Delta][eta] for Equation 14 of this subpart, T2 must be the
temperature 10 K below the boiling point, and Pa2 must be
determined at the temperature 10 K below the boiling point. In the
calculation of MWHAP, the HAP partial pressures must be
determined at the temperature 10 K below the boiling point.
(iii) Use Equation 14 of this subpart over specific temperature
increments. If the initial temperature is lower than 10 K below the
boiling point, emissions must be calculated as the sum over two
increments; one increment is from the initial temperature to 10 K below
the boiling point, and the second is from 10 K below the boiling point
to the lower of either the final temperature or the temperature 5 K
below the boiling point. If the initial temperature is higher than 10 K
below the boiling point, emissions are calculated over one increment
from the initial temperature to the lower of either the final
temperature or the temperature 5 K below the boiling point.
(3)(i) Emissions caused by heating a vessel are calculated using
Equation 18 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR21SE98.015
Where:
E = mass of HAP vapor displaced from the vessel being heated
Navg = average gas space molar volume during the heating
process
PT= total pressure in the vessel
Pi,1 = partial pressure of the individual HAP compounds at
T1
Pi,2 = partial pressure of the individual HAP compounds at
T2
MWHAP = average molecular weight of the HAP compounds
ni,1 = number of moles of condensable in the vessel headspace
at T1
ni,2 = number of moles of condensable in the vessel headspace
at T2
[[Page 133]]
n = number of HAP compounds in the emission stream
(ii) The average gas space molar volume during the heating process
is calculated using Equation 19 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR21SE98.016
Where:
Navg = average gas space molar volume during the heating
process
V = volume of free space in vessel
PT = total pressure in the vessel
R = ideal gas law constant
T1 = initial temperature of the vessel
T2 = final temperature of the vessel
(iii) The difference in the number of moles of condensable in the
vessel headspace between the initial and final temperatures is
calculated using Equation 20 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR21SE98.017
Where:
V = volume of free space in vessel
R = ideal gas law constant
T1 = initial temperature in the vessel
T2 = final temperature in the vessel
Pi,1 = partial pressure of the individual HAP compounds at
T1
Pi,2 = partial pressure of the individual HAP compounds at
T2
n = number of HAP compounds in the emission stream
(4) If the vessel contents are heated to the boiling point,
emissions must be calculated using the procedure in paragraphs
(d)(2)(i)(C)(4)(i) and (ii) of this section.
(i) Use either of the procedures in paragraph (d)(3)(i)(B)(3) of
this section to calculate the emissions from heating to the boiling
point (note that Pa2=0 in the calculation of; and
(ii) While boiling, the vessel must be operated with a properly
operated process condenser. An initial demonstration that a process
condenser is properly operated is required for some process condensers,
as described in paragraph (d)(3)(iii) of this section.
(D) Depressurization. Emissions from depressurization shall be
calculated using the procedures in either paragraphs (d)(2)(i)(D)(1)
through (4), paragraphs (d)(2)(i)(D)(5) through (9), or paragraph
(d)(2)(i)(D)(10) of this section.
(1) Equations 21 and 22 of this subpart are used to calculate the
initial and final volumes of noncondensable gas present in the vessel,
adjusted to atmospheric pressure. The HAP partial pressures may be
calculated using Raoult's law.
[GRAPHIC] [TIFF OMITTED] TR21SE98.018
[GRAPHIC] [TIFF OMITTED] TR21SE98.019
Where:
Vnc1 = initial volume of noncondensable gas in the vessel
Vnc2 = final volume of noncondensable gas in the vessel
V = free volume in the vessel being depressurized
Pnc1 = initial partial pressure of the noncondensable gas, as
calculated using Equation 23 of this subpart, mmHg
Pnc2 = final partial pressure of the noncondensable gas, as
calculated
[[Page 134]]
using Equation 24 of this subpart, mmHg
760 = atmospheric pressure, mmHg
(2) The initial and final partial pressures of the noncondensable
gas in the vessel are determined using Equations 23 and 24 of this
subpart:
[GRAPHIC] [TIFF OMITTED] TR21SE98.020
[GRAPHIC] [TIFF OMITTED] TR21SE98.021
Where:
Pnc1 = initial partial pressure of the noncondensable gas
Pnc2 = final partial pressure of the noncondensable gas
P1 = initial vessel pressure
P2 = final vessel pressure
Pj* = vapor pressure of each condensable (including HAP) in
the emission stream
xj = mole fraction of each condensable (including HAP) in the
liquid phase
m = number of condensable compounds (including HAP) in the emission
stream
j = identifier for a condensable compound
(3) The average ratio of moles of noncondensable to moles of an
individual HAP in the emission stream is calculated using Equation 25 of
this subpart; this calculation must be repeated for each HAP in the
emission stream:
[GRAPHIC] [TIFF OMITTED] TR29AU00.005
Where:
nRi = average ratio of moles of noncondensable to moles of
individual HAP
Pnc1 = initial partial pressure of the noncondensable gas, as
calculated using Equation 23 of this subpart
Pnc2 = final partial pressure of the noncondensable gas, as
calculated using Equation 24 of this subpart
Pi* = vapor pressure of each individual HAP
xi = mole fraction of each individual HAP in the liquid
phase.
n = number of HAP compounds
i = identifier for a HAP compound
(4) The mass of HAP emitted shall be calculated using Equation 26 of
this subpart:
[GRAPHIC] [TIFF OMITTED] TR29AU00.006
Where:
E = mass of HAP emitted
Vnc1 = initial volume of noncondensable gas in the vessel, as
calculated using Equation 21 of this subpart
Vnc2 = final volume of noncondensable gas in the vessel, as
calculated using Equation 22 of this subpart
nRi = average ratio of moles of noncondensable to moles of
individual HAP, as calculated using Equation 25 of this subpart
Patm = atmospheric pressure, standard
R = ideal gas law constant
T = temperature of the vessel, absolute
MWi = molecular weight of each HAP
(5) The moles of HAP vapor initially in the vessel are calculated
using the ideal gas law using Equation 27 of this subpart:
[[Page 135]]
[GRAPHIC] [TIFF OMITTED] TR21SE98.024
Where:
YHAP = mole fraction of HAP (the sum of the individual HAP
fractions, [Sigma]Yi)
V = free volume in the vessel being depressurized
P1 = initial vessel pressure
R = ideal gas law constant
T = vessel temperature, absolute
(6) The initial and final moles of noncondensable gas present in the
vessel are calculated using Equations 28 and 29 of this subpart:
[GRAPHIC] [TIFF OMITTED] TR21SE98.025
[GRAPHIC] [TIFF OMITTED] TR21SE98.026
Where:
n1 = initial number of moles of noncondensable gas in the
vessel
n2 = final number of moles of noncondensable gas in the
vessel
V = free volume in the vessel being depressurized
Pnc1 = initial partial pressure of the noncondensable gas, as
calculated using Equation 23 of this subpart
Pnc2 = final partial pressure of the noncondensable gas, as
calculated using Equation 24 of this subpart
R = ideal gas law constant
T = temperature, absolute
(7) The initial and final partial pressures of the noncondensable
gas in the vessel are determined using Equations 23 and 24 of this
subpart.
(8) The moles of HAP emitted during the depressurization are
calculated by taking an approximation of the average ratio of moles of
HAP to moles of noncondensable and multiplying by the total moles of
noncondensables released during the depressurization, using Equation 30
of this subpart:
where:
[GRAPHIC] [TIFF OMITTED] TR21SE98.027
nHAP = moles of HAP emitted
n1 = initial number of moles of noncondensable gas in the
vessel, as calculated using Equation 28 of this subpart
n2 = final number of moles of noncondensable gas in the
vessel, as calculated using Equation 29 of this subpart
(9) The mass of HAP emitted can be calculated using Equation 31 of
this subpart:
E=[eta]HAP * MWHAP (Eq. 31)
where:
E = mass of HAP emitted
[eta]HAP = moles of HAP emitted, as calculated using Equation
30 of this subpart
MWHAP = average molecular weight of the HAP as calculated
using Equation 17 of this subpart
(10) Emissions from depressurization may be calculated using
equation 32 of this subpart:
[GRAPHIC] [TIFF OMITTED] TR02AU01.034
[[Page 136]]
Where:
V = free volume in vessel being depressurized
R = ideal gas law constant
T = temperature of the vessel, absolute
P1 = initial pressure in the vessel
P2 = final pressure in the vessel
Pj = partial pressure of the individual condensable compounds
(including HAP)
MWi = molecular weight of the individual HAP compounds
n = number of HAP compounds in the emission stream
m = number of condensable compounds (including HAP) in the emission
stream
i = identifier for a HAP compound
j = identifier for a condensable compound.
(E) Vacuum systems. Emissions from vacuum systems may be calculated
using Equation 33 of this subpart if the air leakage rate is known or
can be approximated. The individual HAP partial pressures may be
calculated using Raoult's Law.
[GRAPHIC] [TIFF OMITTED] TR29AU00.007
Where:
E = mass of HAP emitted
Psystem = absolute pressure of receiving vessel or ejector
outlet conditions, if there is no receiver
Pi = partial pressure of the HAP at the receiver temperature
or the ejector outlet conditions
Pj = partial pressure of condensable (including HAP) at the
receiver temperature or the ejector outlet conditions
La = total air leak rate in the system, mass/time
MWnc = molecular weight of noncondensable gas
t = time of vacuum operation
MWi = molecular weight of the individual HAP in the emission
stream, with HAP partial pressures calculated at the temperature of the
receiver or ejector outlet, as appropriate
(F) Gas evolution. Emissions from gas evolution shall be calculated
using Equation 12 of this subpart with V calculated using Equation 34 of
this subpart:
[GRAPHIC] [TIFF OMITTED] TR21SE98.030
Where:
V = volumetric flow rate of gas evolution
Wg = mass flow rate of gas evolution
R = ideal gas law constant
T = temperature at the exit, absolute
PT = vessel pressure
MWg = molecular weight of the evolved gas
(G) Air drying. Emissions from air drying shall be calculated using
Equation 35 of this subpart:
[[Page 137]]
[GRAPHIC] [TIFF OMITTED] TR21SE98.031
Where:
E = mass of HAP emitted
B = mass of dry solids
PS1 = HAP in material entering dryer, weight percent
PS2 = HAP in material exiting dryer, weight percent
(H) Empty vessel purging. Emissions from empty vessel purging shall
be calculated using Equation 36 of this subpart (Note: The term
e-Ft/v can be assumed to be 0):
[GRAPHIC] [TIFF OMITTED] TR21SE98.032
Where:
V = volume of empty vessel
R = ideal gas law constant
T = temperature of the vessel vapor space; absolute
Pi = partial pressure of the individual HAP at the beginning
of the purge
(MWi) = molecular weight of the individual HAP
F = flowrate of the purge gas
t = duration of the purge
n = number of HAP compounds in the emission stream
i = identifier for a HAP compound
(ii) Engineering assessments. The owner or operator shall conduct an
engineering assessment to calculate uncontrolled HAP emissions for each
emission episode that is not due to vapor displacement, purging,
heating, depressurization, vacuum operations, gas evolution, or air
drying. For emission episodes caused by any of these types of
activities, the owner or operator also may calculate uncontrolled HAP
emissions based on an engineering assessment if the owner or operator
can demonstrate to the Administrator that the methods in paragraph
(d)(2)(i) of this section are not appropriate. Modified versions of the
engineering evaluation methods in paragraphs (d)(2)(i)(A) through (H)
may be used if the owner or operator demonstrates that they have been
used to meet other regulatory obligations, and they do not affect
applicability assessments or compliance determinations under this
subpart GGG.One criterion the owner or operator could use to demonstrate
that the methods in paragraph (d)(2)(i) of this section are not
appropriate is if previous test data are available that show a greater
than 20 percent discrepancy between the test value and the estimated
value. An engineering assessment includes, but is not limited to, the
following:
(A) Previous test results, provided the tests are representative of
current operating practices at the process unit.
(B) Bench-scale or pilot-scale test data representative of the
process under representative operating conditions.
(C) Maximum flow rate, HAP emission rate, concentration, or other
relevant parameter specified or implied within a permit limit applicable
to the process vent.
(D) Design analysis based on accepted chemical engineering
principles, measurable process parameters, or physical or chemical laws
or properties. Examples of analytical methods include, but are not
limited to:
(1) Use of material balances based on process stoichiometry to
estimate maximum organic HAP concentrations.
(2) Estimation of maximum flow rate based on physical equipment
design such as pump or blower capacities.
(3) Estimation of HAP concentrations based on saturation conditions.
[[Page 138]]
(E) All data, assumptions, and procedures used in the engineering
assessment shall be documented in accordance with Sec. 63.1260(e). Data or
other information supporting a finding that the emissions estimation
equations are inappropriate shall be reported in the Precompliance
report.
(3) Controlled emissions. An owner or operator shall determine
controlled emissions using the procedures in either paragraph (d)(3)(i)
or (ii) of this section.
(i) Small control devices. Except for condensers, controlled
emissions for each process vent that is controlled using a small control
device shall be determined by using the design evaluation described in
paragraph (d)(3)(i)(A) of this section, or conducting a performance test
in accordance with paragraph (d)(3)(ii) of this section. Whenever a
small control device becomes a large control device, the owner or
operator must comply with the provisions in paragraph (d)(3)(ii) of this
section and submit the test report in the next Periodic report.
(A) Design evaluation. The design evaluation shall include
documentation demonstrating that the control device being used achieves
the required control efficiency under worst-case conditions, as
determined from the emission profile described in Sec. 63.1257(b)(8)(ii).
The control efficiency determined from this design evaluation shall be
applied to uncontrolled emissions to estimate controlled emissions. The
documentation must be conducted in accordance with the provisions in
paragraph (a)(1) of this section. The design evaluation shall also
include the value(s) and basis for the parameter(s) monitored under Sec.
63.1258.
(B) Emission estimation equations. An owner or operator using a
condenser as a control device shall determine controlled emissions using
exhaust gas temperature measurements and calculations for each batch
emission episode within each unit operation according to the engineering
methodology in paragraphs (d)(3)(i)(B)(1) through (8) of this section.
Individual HAP partial pressures shall be calculated as specified in
paragraph (d)(2)(i) of this section.
(1) Emissions from vapor displacement shall be calculated using
Equation 11 of this subpart with T set equal to the temperature of the
receiver and the HAP partial pressures determined at the temperature of
the receiver.
(2) Emissions from purging shall be calculated using Equation 12 of
this subpart with T set equal to the temperature of the receiver and the
HAP partial pressures determined at the temperature of the receiver.
(3) Emissions from heating shall be calculated using either Equation
13 of this subpart or Equation 37 of this subpart. In Equation 13, the
HAP vapor pressures shall be determined at the temperature of the
receiver. In Equations 13 and 37 of this subpart, [Delta][eta] is equal
to the number of moles of noncondensable displaced from the vessel, as
calculated using Equation 15 of this subpart. In Equations 13 and 37 of
this subpart, the HAP average molecular weight shall be calculated using
Equation 17 with the HAP partial pressures determined at the temperature
of the receiver.
[GRAPHIC] [TIFF OMITTED] TR21SE98.033
Where:
E = mass of HAP emitted
[Delta][eta] = moles of noncondensable gas displaced
PT = pressure in the receiver
Pi = partial pressure of the individual HAP at the receiver
temperature
Pj = partial pressure of the individual condensable
(including HAP) at the receiver temperature
n = number of HAP compounds in the emission stream
i = identifier for a HAP compound
MWHAP = the average molecular weight of HAP in vapor exiting
the receiver, as calculated using Equation 17 of this subpart
m = number of condensable compounds (including HAP) in the emission
stream
(4)(i) Emissions from depressurization shall be calculated using
Equation 38 of this subpart.
[[Page 139]]
[GRAPHIC] [TIFF OMITTED] TR21SE98.034
Where:
E = mass of HAP vapor emitted
Vnc1 = initial volume of noncondensable in the vessel,
corrected to the final pressure, as calculated using Equation 39 of this
subpart
Vnc2 = final volume of noncondensable in the vessel, as
calculated using Equation 40 of this subpart
Pi = partial pressure of each individual HAP at the receiver
temperature
Pj = partial pressure of each condensable (including HAP) at
the receiver temperature
PT = receiver pressure
T = temperature of the receiver
R = ideal gas law constant
MWHAP = the average molecular weight of HAP calculated using
Equation 17 of this subpart with partial pressures determined at the
receiver temperature
i = identifier for a HAP compound
n = number of HAP compounds in the emission stream
m = number of condensable compounds (including HAP) in the emission
stream
j = identifier for a condensable compound
(ii) The initial and final volumes of noncondensable gas present in
the vessel, adjusted to the pressure of the receiver, are calculated
using Equations 39 and 40 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR21SE98.035
[GRAPHIC] [TIFF OMITTED] TR21SE98.036
Where:
Vnc1 = initial volume of noncondensable gas in the vessel
Vnc2 = final volume of noncondensable gas in the vessel
V = free volume in the vessel being depressurized
Pnc1 = initial partial pressure of the noncondensable gas, as
calculated using Equation 41 of this subpart
Pnc2 = final partial pressure of the noncondensable gas, as
calculated using Equation 42 of this subpart
PT = pressure of the receiver
(iii) Initial and final partial pressures of the noncondensable gas
in the vessel are determined using Equations 41 and 42 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR21SE98.037
[GRAPHIC] [TIFF OMITTED] TR21SE98.038
Where:
Pnc1 = initial partial pressure of the noncondensable gas in
the vessel
Pnc2 = final partial pressure of the noncondensable gas in
the vessel
P1 = initial vessel pressure
P2 = final vessel pressure
Pj = partial pressure of each condensable compound (including
HAP) in the vessel
m = number of condensable compounds (including HAP) in the emission
stream
j = identifier for a condensable compound
(5) Emissions from vacuum systems shall be calculated using Equation
33 of this subpart.
(6) Emissions from gas evolution shall be calculated using Equation
12 with V calculated using Equation 34 of this subpart, T set equal to
the receiver temperature, and the HAP partial pressures determined at
the receiver temperature. The term for time, t, in Equation 12 of this
subpart is not
[[Page 140]]
needed for the purposes of this calculation.
(7) Emissions from air drying shall be calculated using Equation 11
of this subpart with V equal to the air flow rate and Pi
determined at the receiver temperature.
(8) Emissions from empty vessel purging shall be calculated using
equation 43 of this subpart:
[GRAPHIC] [TIFF OMITTED] TR21SE98.039
Where:
V = volume of empty vessel
R = ideal gas law constant
T1 = temperature of the vessel vapor space at beginning of
purge
T2 = temperature of the receiver, absolute
(Pi)T1 = partial pressure of the individual HAP at
the beginning of the purge
(Pi)T2 = partial pressure of the individual HAP at
the receiver temperature
MWi = molecular weight of the individual HAP
F = flowrate of the purge gas
t = duration of the purge
n = number of HAP compounds in the emission stream
i = identifier for a HAP compound
(ii) Large control devices. Except for condensers, controlled
emissions for each process vent that is controlled using a large control
device shall be determined by applying the control efficiency of the
large control device to the estimated uncontrolled emissions. The
control efficiency shall be determined by conducting a performance test
on the control device as described in paragraphs (d)(3)(ii)(A) through
(C) of this section, or by using the results of a previous performance
test as described in paragraph (d)(4) of this section. If the control
device is intended to control only hydrogen halides and halogens, the
owner or operator may assume the control efficiency of organic HAP is
zero percent. If the control device is intended to control only organic
HAP, the owner or operator may assume the control efficiency for
hydrogen halides and halogen is zero percent. Owners and operators are
not required to conduct performance tests for devices described in
paragraphs (a)(4) and (d)(4) of this section that are large control
devices, as defined in Sec. 63.1251.
(A) The performance test shall be conducted by performing emission
testing on the inlet and outlet of the control device following the test
methods and procedures of Sec. 63.1257(b). Concentrations shall be
calculated from the data obtained through emission testing according to
the procedures in paragraph (a)(2) of this section.
(B) Performance testing shall be conducted under absolute, or
hypothetical worst-case conditions, as defined in paragraphs
(b)(8)(i)(A) through (B) of this section.
(C) The owner or operator may elect to conduct more than one
performance test on the control device for the purpose of establishing
more than one operating condition at which the control device achieves
the required control efficiency.
(iii) Initial compliance demonstration for condensers. (A) Air
pollution control devices. During periods in which a condenser functions
as an air pollution control device, controlled emissions shall be
calculated using the emission estimation equations described in
paragraph (d)(3)(i)(B) of this section.
(B) Process condensers. During periods when the condenser is
operating as a process condenser, the owner or operator is required to
demonstrate that the process condenser is properly operated if the
process condenser meets either of the criteria described in paragraphs
(d)(3)(iii)(B)(1) and (2) of this
[[Page 141]]
section. The owner or operator must either measure the condenser exhaust
gas temperature and show it is less than the boiling or bubble point of
the substance(s) in the vessel, or perform a material balance around the
vessel and condenser to show that at least 99 percent of the material
vaporized while boiling is condensed. The initial demonstration shall be
conducted for all appropriate operating scenarios and documented in the
Notification of Compliance Status report described in Sec. 63.1260(f).
(1) The process condenser is not followed by an air pollution
control device; or
(2) The air pollution control device following the process condenser
is not a condenser or is not meeting the alternative standard of Sec.
63.1254(c).
(4) An owner or operator is not required to conduct a performance
test for the following:
(i) Any control device for which a previous performance test was
conducted, provided the test was conducted using the same procedures
specified in Sec. 63.1257(b) over conditions typical of the appropriate
worst-case, as defined in Sec. 63.1257(b)(8)(i). The results of the
previous performance test shall be used to demonstrate compliance.
(e) Compliance with wastewater provisions. (1) Determining annual
average concentration and annual load. To determine the annual average
concentration and annual load of partially soluble and/or soluble HAP
compounds in a wastewater stream, as required by Sec. 63.1256(a)(1), an
owner or operator shall comply with the provisions in paragraphs
(e)(1)(i) through (iii) of this section. A wastewater stream is exempt
from the requirements of Sec. 63.1256(a)(2) if the owner or operator
determines the annual average concentration and annual load are below
all of the applicability cutoffs specified in Sec. 63.1256(a)(1)(i)(A)
through (D). For annual average concentration, only initial rinses are
included. Concentration measurements based on Method 305 shall be
adjusted by dividing each concentration by the compound-specific Fm
factor listed in Table 8 of this subpart. Concentration measurements
based on methods other than Method 305 may not be adjusted by the
compound-specific Fm factor listed in Table 8 of this subpart.
(i) Annual average concentration definition. (A) When complying with
Sec. 63.1256(a)(1)(i)(A), the annual average concentration means the total
mass of partially soluble HAP compounds occurring in the wastewater
stream during the calendar year divided by the total mass of the
wastewater stream discharged during the same calendar year.
(B) When complying with Sec. 63.1256(a)(1)(i) (B) or (C), the annual
average concentration means the total mass of partially soluble and/or
soluble HAP compounds occurring in the wastewater stream during the
calendar year divided by the total mass of the wastewater stream
discharged during the same calendar year.
(C) When complying with Sec. 63.1256(a)(1)(i)(D), the annual average
concentration means the total mass of soluble HAP compounds occurring in
the wastewater stream during the calendar year divided by the total mass
of the wastewater stream discharged during the same calendar year.
(ii) Determination of annual average concentration. An owner or
operator shall determine annual average concentrations of partially
soluble and/or soluble HAP compounds in accordance with the provisions
specified in paragraph (e)(1)(ii)(A), (B), or (C) of this section. The
owner or operator may determine annual average concentrations by process
simulation. Data and other information supporting the simulation shall
be reported in the Precompliance Report for approval by the
Administrator. The annual average concentration shall be determined
either at the POD or downstream of the POD with adjustment for
concentration changes made according to paragraph (e)(1)(ii)(D) of this
section.
(A) Test methods. The concentration of partially soluble HAP,
soluble HAP, or total HAP shall be measured using any of the methods
described in paragraphs (b)(10)(i) through (iv) of this section.
(B) Knowledge of the wastewater stream. The concentration of
partially soluble HAP, soluble HAP, or total HAP shall be calculated
based on knowledge of the wastewater stream
[[Page 142]]
according to the procedures in paragraphs (e)(1)(ii)(B)(1) and (2) of
this section. The owner or operator shall document concentrations in the
Notification of Compliance Status report described in Sec. 63.1260(f).
(1) Mass balance. The owner or operator shall calculate the
concentrations of HAP compounds in wastewater considering the total
quantity of HAP discharged to the water, the amount of water at the POD,
and the amounts of water and solvent lost to other mechanisms such as
reactions, air emissions, or uptake in product or other processing
materials. The quantities of HAP and water shall be based on batch
sheets, manufacturing tickets, or FDA bills of materials. In cases where
a chemical reaction occurs that generates or consumes HAP, the amount of
HAP remaining after a reaction shall be based on stoichometry assuming
100 percent theoretical consumption or yield, as applicable.
(2) Published water solubility data. For single components in water,
owners and operators may use the water solubilities published in
standard reference texts at the POD temperature to determine maximum HAP
concentration.
(C) Bench scale or pilot-scale test data. The concentration of
partially soluble HAP, soluble HAP, or total HAP shall be calculated
based on bench scale or pilot-scale test data. The owner or operator
shall provide sufficient information to demonstrate that the bench-scale
or pilot-scale test concentration data are representative of actual HAP
concentrations. The owner or operator shall also provide documentation
describing the testing protocol, and the means by which sample
variability and analytical variability were accounted for in the
determination of HAP concentrations. Documentation of the pilot-scale or
bench scale analysis shall be provided in the precompliance report.
(D) Adjustment for concentrations determined downstream of the POD.
The owner or operator shall make corrections to the annual average
concentration when the concentration is determined downstream of the POD
at a location where: two or more wastewater streams have been mixed; one
or more wastewater streams have been treated; or, losses to the
atmosphere have occurred. The owner or operator shall make the
adjustments either to the individual data points or to the final annual
average concentration.
(iii) Determination of annual load. An owner or operator shall
calculate the partially soluble and/or soluble HAP load in a wastewater
stream based on the annual average concentration determined in paragraph
(e)(1)(ii) (A), (B), or (C) of this section and the total volume of the
wastewater stream, based on knowledge of the wastewater stream in
accordance with paragraphs (e)(1)(ii)(B) of this section. The owner or
operator shall maintain records of the total liters of wastewater
discharged per year as specified in Sec. 63.1259(b).
(2) Compliance with treatment unit control provisions. (i)
Performance tests and design evaluations-general. To comply with the
control options in Sec. 63.1256(g) (10) or (13), neither a design
evaluation nor a performance test is required. For any other
nonbiological treatment process, the owner or operator shall conduct
either a design evaluation as specified in paragraph (e)(2)(ii) of this
section, or a performance test as specified in paragraph (e)(2)(iii) of
this section to demonstrate that each nonbiological treatment process
used to comply with Sec. 63.1256(g) (8), (9), and/or (12) achieves the
conditions specified for compliance. The owner or operator shall
demonstrate by the procedures in either paragraph (e)(2) (ii) or (iii)
of this section that each closed biological treatment process used to
comply with Sec. 63.1256 (g)(8)(ii), (g)(9)(ii), (g)(11), or (g)(12)
achieves the conditions specified for compliance. If an open biological
treatment unit is used to comply with Sec. 63.1256 (g)(8)(ii), (g)(9)(ii),
(g)(11), or (g)(12), the owner or operator shall comply with the
performance test requirements in paragraph (e)(2)(iii) of this section.
(ii) Design evaluation. A design evaluation and supporting
documentation that addresses the operating characteristics of the
treatment process and that is based on operation at a wastewater stream
flow rate and a concentration under which it would be
[[Page 143]]
most difficult to demonstrate compliance. For closed biological
treatment processes, the percent reduction from removal/destruction in
the treatment unit and control device shall be determined by a mass
balance over the unit. The mass flow rate of soluble and/or partially
soluble HAP compounds exiting the treatment process shall be the sum of
the mass flow rate of soluble and/or partially soluble HAP compounds in
the wastewater stream exiting the biological treatment process and the
mass flow rate of the vented gas stream exiting the control device. The
mass flow rate entering the treatment process minus the mass flow rate
exiting the process determines the actual mass removal. Compounds that
meet the requirements specified in paragraph (e)(2)(iii)(A)(4) of this
section are not required to be included in the design evaluation; the
term ``performance test'' in paragraph (e)(2)(iii)(A)(4) of this section
shall mean ``design evaluation'' for the purposes of this paragraph.
(iii) Performance tests. Performance tests shall be conducted using
test methods and procedures that meet the applicable requirements
specified in paragraphs (e)(2)(iii)(A) through (G) of this section.
(A) General. This paragraph specifies the general procedures for
performance tests that are conducted to demonstrate compliance of a
treatment process with the control requirements specified in Sec.
63.1256(g).
(1) Representative process unit operating conditions. Compliance
shall be demonstrated for representative operating conditions.
Operations during periods of malfunction and periods of nonoperation
shall not constitute representative conditions. The owner or operator
shall record the process information that is necessary to document
operating conditions during the test.
(2) Representative treatment process operating conditions.
Performance tests shall be conducted when the treatment process is
operating at a representative inlet flow rate and concentration. If the
treatment process will be operating at several different sets of
representative operating conditions, the owner or operator shall comply
with paragraphs (e)(2)(iii)(A)(2)(i) and (ii) of this section. The owner
or operator shall record information that is necessary to document
treatment process or control device operating conditions during the
test.
(i) Range of operating conditions. If the treatment process will be
operated at several different sets of representative operating
conditions, performance testing over the entire range is not required.
In such cases, the performance test results shall be supplemented with
modeling and/or engineering assessments to demonstrate performance over
the operating range.
(ii) Consideration of residence time. If concentration and/or flow
rate to the treatment process are not relatively constant (i.e.,
comparison of inlet and outlet data will not be representative of
performance), the owner or operator shall consider residence time, when
determining concentration and flow rate.
(3) Testing equipment. All testing equipment shall be prepared and
installed as specified in the applicable test methods, or as approved by
the Administrator.
(4) Compounds not required to be considered in performance tests.
Compounds that meet the requirements specified in (e)(2)(iii)(A)(4)(i),
(ii), or (iii) of this section are not required to be included in the
performance test. Concentration measurements based on Method 305 shall
be adjusted by dividing each concentration by the compound-specific Fm
factor listed in Table 8 of this subpart. Concentration measurements
based on methods other than Method 305 shall not be adjusted by the
compound-specific Fm factor listed in Table 8 of this subpart.
(i) Compounds not used or produced by the PMPU; or
(ii) Compounds with concentrations at the POD that are below 1 ppmw;
or
(iii) Compounds with concentrations at the POD that are below the
lower detection limit where the lower detection limit is greater than 1
ppmw. The method shall be an analytical method for wastewater which has
the compound of interest as a target analyte.
(5) Treatment using a series of treatment processes. In all cases
where the wastewater provisions in this subpart allow or require the use
of a treatment
[[Page 144]]
process to comply with emissions limitations, the owner or operator may
use multiple treatment processes. The owner or operator complying with
the requirements of Sec. 63.1256(g)(7)(i), when wastewater is conveyed by
hard-piping, shall comply with either paragraph (e)(2)(iii)(A)(5)(i) or
(ii) of this section. The owner or operator complying with the
requirements of Sec. 63.1256(g)(7)(ii) shall comply with the requirements
of paragraph (e)(2)(iii)(A)(5)(ii) of this section.
(i) The owner or operator shall conduct the performance test across
each series of treatment processes. For each series of treatment
processes, inlet concentration and flow rate shall be measured either
where the wastewater enters the first treatment process in a series of
treatment processes, or prior to the first treatment process as
specified in paragraph (e)(2)(iii)(A)(6) of this section. For each
series of treatment processes, outlet concentration and flow rate shall
be measured where the wastewater exits the last treatment process in the
series of treatment processes, except when the last treatment process is
an open or a closed aerobic biological treatment process demonstrating
compliance by using the procedures in paragraphs (e)(2)(iii)(E) or (F)
of this section. When the last treatment process is either an open or a
closed aerobic biological treatment process demonstrating compliance by
using the procedures in paragraphs (e)(2)(iii)(E) or (F) of this
section, inlet and outlet concentrations and flow rates shall be
measured at the inlet and outlet to the series of treatment processes
prior to the biological treatment process and at the inlet to the
biological treatment process, except as provided in paragraph
(e)(2)(iii)(A)(6)(ii) of this section. The mass flow rate destroyed in
the biological treatment process for which compliance is demonstrated
using paragraph (e)(2)(iii)(E) or (F) of this section shall be added to
the mass flow rate removed or destroyed in the series of treatment units
before the biological treatment unit. This sum shall be used to
calculate the overall control efficiency.
(ii) The owner or operator shall conduct the performance test across
each treatment process in the series of treatment processes. The mass
flow rate removed or destroyed by each treatment process shall be added
together and the overall control efficiency calculated to determine
whether compliance has been demonstrated using paragraphs
(e)(2)(iii)(C), (D), (E), (F), or (G) of this section, as applicable. If
a biological treatment process is one of the treatment processes in the
series of treatment processes, the inlet to the biological treatment
process shall be the point at which the wastewater enters the biological
treatment process, or the inlet to the equalization tank if all the
criteria of paragraph (e)(2)(iii)(A)(6)(ii) of this section are met.
(6) The owner or operator determining the inlet for purposes of
demonstrating compliance with paragraph (e)(2)(iii)(E), or (F)of this
section may elect to comply with paragraph (e)(2)(iii)(A)(6)(i) or (ii)
of this section.
(i) When wastewater is conveyed exclusively by hard-piping from the
point of determination to a treatment process that is either the only
treatment process or the first in a series of treatment processes (i.e.,
no treatment processes or other waste management units are used upstream
of this treatment process to store, handle, or convey the wastewater),
the inlet to the treatment process shall be at any location from the
point of determination to where the wastewater stream enters the
treatment process. When samples are taken upstream of the treatment
process and before wastewater streams have converged, the owner or
operator shall ensure that the mass flow rate of all affected wastewater
is accounted for when using Sec. 63.1256(g)(8)(ii), (g)(9)(ii) or (g)(12)
of this subpart to comply and that the mass flow rate of all wastewater,
not just affected wastewater, is accounted for when using Sec.
63.1256(g)(11) to comply, except as provided in paragraph
(e)(2)(iii)(A)(4) of this section.
(ii) The owner or operator may consider the inlet to the
equalization tank as the inlet to the biological treatment process if
the wastewater is conveyed by hard-piping from either the last previous
treatment process or the point of determination to the equalization
[[Page 145]]
tank; or the wastewater is conveyed from the equalization tank
exclusively by hard-piping to the biological treatment process and no
treatment processes or other waste management units are used to store,
handle, or convey the wastewater between the equalization tank and the
biological treatment process; or the equalization tank is equipped with
a fixed roof and a closed-vent system that routes emissions to a control
device that meets the requirements of Sec. 63.1256(b)(1)(i) through (iv)
and Sec. 63.1256(b)(2)(i). The outlet from the series of treatment
processes prior to the biological treatment process is the point at
which the wastewater exits the last treatment process in the series
prior to the equalization tank, if the equalization tank and biological
treatment process are part of a series of treatment processes. The owner
or operator shall ensure that the mass flow rate of all affected
wastewater is accounted for when using Sec. 63.1256(g)(9)(ii) or (12) to
comply and that the mass flow rate of all wastewater, not just affected
wastewater is accounted for when using Sec. 63.1256(g)(11) to comply,
except as provided in paragraph (e)(2)(iii)(A)(4) of this section.
(B) Noncombustion treatment process--concentration limits. This
paragraph applies to performance tests that are conducted to demonstrate
compliance of a noncombustion treatment process with the ppmw wastewater
stream concentration limits at the outlet of the treatment process. This
compliance option is specified in Sec. 63.1256(g)(8)(i) and (9)(i).
Wastewater samples shall be collected using sampling procedures which
minimize loss of organic compounds during sample collection and analysis
and maintain sample integrity per paragraph (b)(10)(vi) of this section.
Samples shall be collected and analyzed using the procedures specified
in paragraphs (b)(10)(i) through (vi) of this section. Samples may be
grab samples or composite samples. Samples shall be taken at
approximately equally spaced time intervals over a 1-hour period. Each
1-hour period constitutes a run, and the performance test shall consist
of a minimum of three runs. Concentration measurements based on methods
other than Method 305 may be adjusted by multiplying each concentration
by the compound-specific Fm factor listed in Table 8 of this subpart.
(For affected wastewater streams that contains both partially soluble
and soluble HAP compounds, compliance is demonstrated only if the sum of
the concentrations of partially soluble HAP compounds is less than 50
ppmw, and the sum of the concentrations of soluble HAP compounds is less
than 520 ppmw.)
(C) Noncombustion, nonbiological treatment process: percent mass
removal/destruction option. This paragraph applies to performance tests
that are conducted to demonstrate compliance of a noncombustion,
nonbiological treatment process with the percent mass removal limits
specified in Sec. 63.1256(g)(8)(ii) and (9)(ii) for partially soluble and
soluble HAP compounds, respectively. The owner or operator shall comply
with the requirements specified in paragraphs (e)(2)(iii)(C)(1) through
(5) of this section.
(1) Concentration. The concentration of partially soluble and/or
soluble HAP compounds entering and exiting the treatment process shall
be determined as provided in this paragraph. Wastewater samples shall be
collected using sampling procedures which minimize loss of organic
compounds during sample collection and analysis and maintain sample
integrity per paragraph (b)(10)(vi) of this section. The method shall be
an analytical method for wastewater which has the compound of interest
as a target analyte. Samples may be grab samples or composite samples.
Samples shall be taken at approximately equally spaced time intervals
over a 1-hour period. Each 1-hour period constitutes a run, and the
performance test shall consist of a minimum of three runs. Concentration
measurements based on Method 305 shall be adjusted by dividing each
concentration by the compound-specific Fm factor listed in Table 8 of
this subpart. Concentration measurements based on methods other than
Method 305 shall not be adjusted by the compound-specific Fm factor
listed in Table 8 of this subpart.
(2) Flow rate. The flow rate of the entering and exiting wastewater
streams shall be determined using inlet and outlet flow meters,
respectively. Where
[[Page 146]]
the outlet flow is not greater than the inlet flow, a single flow meter
may be used, and may be used at either the inlet or outlet. Flow rate
measurements shall be taken at the same time as the concentration
measurements.
(3) Calculation of mass flow rate--for noncombustion, nonbiological
treatment processes. The mass flow rates of partially soluble and/or
soluble HAP compounds entering and exiting the treatment process are
calculated using Equations 44 and 45 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR21SE98.040
[GRAPHIC] [TIFF OMITTED] TR21SE98.041
Where:
QMWa, QMWb = mass flow rate of partially soluble
or soluble HAP compounds, average of all runs, in wastewater entering
(QMWa) or exiting (QMWb) the treatment process,
kg/hr
[rho] = density of the wastewater, kg/m\3\
Qa,k, Qbb,k = volumetric flow rate of wastewater
entering (Qa,k) or exiting (Qb,k) the treatment
process during each run k, m3/hr
CT,a,k, CT,b,k = total concentration of partially
soluble or soluble HAP compounds in wastewater entering
(CT,a,k) or exiting (CT,b,k) the treatment process
during each run k, ppmw
p = number of runs
k = identifier for a run
106 = conversion factor, mg/kg
(4) Percent removal calculation for mass flow rate. The percent mass
removal across the treatment process shall be calculated as follows:
[GRAPHIC] [TIFF OMITTED] TR21SE98.042
Where:
E = removal or destruction efficiency of the treatment process, percent
QMWa, QMWb = mass flow rate of partially soluble
or soluble HAP compounds in wastewater entering (QMWa) and
exiting (QMWb) the treatment process, kg/hr (as calculated
using Equations 44 and 45 of this subpart)
(5) Compare mass removal efficiency to required efficiency. Compare
the mass removal efficiency (calculated in Equation 46 of this subpart)
to the required efficiency as specified in Sec. 63.1256(g)(8)(ii) or
(9)(ii). If complying with Sec. 63.1256(g)(8)(ii), compliance is
demonstrated if the mass removal efficiency is 99 percent or greater. If
complying with Sec. 63.1256(g)(9)(ii), compliance is demonstrated if the
mass removal efficiency is 90 percent or greater.
(D) Combustion treatment processes: percent mass removal/destruction
option. This paragraph applies to performance tests that are conducted
to demonstrate compliance of a combustion treatment process with the
percent mass destruction limits specified in Sec. 63.1256(g)(8)(ii) for
partially soluble HAP compounds, and/or Sec. 63.1256(g)(9)(ii) for soluble
HAP compounds. The owner or operator shall comply with the requirements
specified in paragraphs (e)(2)(iii)(D)(1) through (8) of this section.
(1) Concentration in wastewater stream entering the combustion
treatment process. The concentration of partially soluble and/or soluble
HAP compounds entering the treatment process shall be determined as
provided in this paragraph. Wastewater samples shall be collected using
sampling procedures which minimize loss of organic compounds during
sample collection and analysis and maintain sample integrity per
paragraph (b)(10)(vi) of this section. The method shall be an analytical
[[Page 147]]
method for wastewater which has the compound of interest as a target
analyte. Samples may be grab samples or composite samples. Samples shall
be taken at approximately equally spaced time intervals over a 1-hour
period. Each 1-hour period constitutes a run, and the performance test
shall consist of a minimum of three runs. Concentration measurements
based on Method 305 of appendix A of this part shall be adjusted by
dividing each concentration by the compound-specific Fm factor listed in
Table 8 of this subpart. Concentration measurements based on methods
other than Method 305 shall not be adjusted by the compound-specific Fm
factor listed in Table 8 of this subpart.
(2) Flow rate of wastewater entering the combustion treatment
process. The flow rate of the wastewater stream entering the combustion
treatment process shall be determined using an inlet flow meter. Flow
rate measurements shall be taken at the same time as the concentration
measurements.
(3) Calculation of mass flow rate in wastewater stream entering
combustion treatment processes. The mass flow rate of partially soluble
and/or soluble HAP compounds entering the treatment process is
calculated as follows:
[GRAPHIC] [TIFF OMITTED] TR21SE98.043
Where:
QMWa = mass flow rate of partially soluble or soluble HAP
compounds entering the combustion unit, kg/hr
[rho] = density of the wastewater stream, kg/m\3\
Qa,k = volumetric flow rate of wastewater entering the
combustion unit during run k, m3/hr
CT,a,k = total concentration of partially soluble or soluble
HAP compounds in the wastewater stream entering the combustion unit
during run k, ppmw
k = identifier for a run
p = number of runs
(4) Concentration in vented gas stream exiting the combustion
treatment process. The concentration of partially soluble and/or soluble
HAP compounds (or TOC) exiting the combustion treatment process in any
vented gas stream shall be determined as provided in this paragraph.
Samples may be grab samples or composite samples. Samples shall be taken
at approximately equally spaced time intervals over a 1-hour period.
Each 1-hour period constitutes a run, and the performance test shall
consist of a minimum of three runs. Concentration measurements shall be
determined using Method 18 of 40 CFR part 60, appendix A. Alternatively,
any other test method validated according to the procedures in Method
301 of appendix A of this part may be used.
(5) Volumetric flow rate of vented gas stream exiting the combustion
treatment process. The volumetric flow rate of the vented gas stream
exiting the combustion treatment process shall be determined using
Method 2, 2A, 2C, or 2D of 40 CFR part 60, appendix A, as appropriate.
Volumetric flow rate measurements shall be taken at the same time as the
concentration measurements.
(6) Calculation of mass flow rate of vented gas stream exiting
combustion treatment processes. The mass flow rate of partially soluble
and/or soluble HAP compounds in a vented gas stream exiting the
combustion treatment process shall be calculated as follows:
[GRAPHIC] [TIFF OMITTED] TR21SE98.044
[[Page 148]]
where:
QMGb = mass rate of TOC (minus methane and ethane) or total
partially soluble and/or soluble HAP, in vented gas stream, exiting
(QMGb) the combustion device, dry basis, kg/hr
CGb,i = concentration of TOC (minus methane and ethane) or
total partially soluble and/or soluble HAP, in vented gas stream,
exiting (CGb,i) the combustion device, dry basis, ppmv
MWi = molecular weight of a component, kilogram/kilogram-mole
QGb = flow rate of gas stream exiting (QGb) the
combustion device, dry standard cubic meters per hour
K2 = constant, 41.57x10-9 (parts per
million)-1 (gram-mole per standard cubic meter) (kilogram/
gram), where standard temperature (gram-mole per standard cubic meter)
is 20 C
i = identifier for a compound
n = number of components in the sample
(7) Destruction efficiency calculation. The destruction efficiency
of the combustion unit for partially soluble and/or soluble HAP
compounds shall be calculated as follows:
[GRAPHIC] [TIFF OMITTED] TR21SE98.045
Where:
E = destruction efficiency of partially soluble or soluble HAP compounds
for the combustion unit, percent
QMW2a = mass flow rate of partially soluble or soluble HAP
compounds entering the combustion unit, kg/hr
QMGb = mass flow rate of TOC (minus methane and ethane) or
partially soluble and/or soluble HAP compounds in vented gas stream
exiting the combustion treatment process, kg/hr
(8) Compare mass destruction efficiency to required efficiency.
Compare the mass destruction efficiency (calculated in Equation 49 of
this subpart) to the required efficiency as specified in Sec.
63.1256(g)(8)(ii) or (g)(9)(ii). If complying with Sec. 63.1256(g)(8)(ii),
compliance is demonstrated if the mass destruction efficiency is 99
percent or greater. If complying with Sec. 63.1256(g)(9)(ii), compliance is
demonstrated if the mass destruction efficiency is 90 percent or
greater.
(E) Open or closed aerobic biological treatment processes: 95-
percent mass destruction option. This paragraph applies to performance
tests that are conducted for open or closed aerobic biological treatment
processes to demonstrate compliance with the 95-percent mass destruction
provisions in Sec. 63.1256(g)(11) for partially soluble and/or soluble HAP
compounds.
(1) Concentration in wastewater stream. The concentration of
partially soluble and/or soluble HAP as provided in this paragraph.
Concentration measurements to determine E shall be taken as provided in
paragraph (e)(2)(iii)(A)(5) of this section for a series of treatment
processes. Wastewater samples shall be collected using sampling
procedures which minimize loss of organic compounds during sample
collection and analysis and maintain sample integrity per paragraph
(b)(10)(vi) of this section. The method shall be an analytical method
for wastewater which has the compound of interest as a target analyte.
Samples may be grab samples or composite samples. Samples shall be taken
at approximately equally spaced time intervals over a 1-hour period.
Each 1-hour period constitutes a run, and the performance test shall
consist of a minimum of three runs. Concentration measurements based on
Method 305 shall be adjusted by dividing each concentration by the
compound-specific Fm factor listed in Table 8 of this subpart.
Concentration measurements based on methods other than Method 305 shall
not be adjusted by the compound-specific Fm factor listed in Table 8 of
this subpart.
(2) Flow rate. Flow rate measurements to determine E shall be taken
as provided in paragraph (e)(2)(iii)(A)(5) of this section for a series
of treatment processes. Flow rate shall be determined using inlet and
outlet flow measurement devices. Where the outlet flow is not greater
than the inlet flow, a single flow measurement device may be used, and
may be used at either the inlet or outlet. Flow rate measurements shall
be taken at the same time as the concentration measurements.
[[Page 149]]
(3) Destruction efficiency. The owner or operator shall comply with
the provisions in either paragraph (e)(2)(iii)(E)(3)(i) or (ii) of this
section. Compliance is demonstrated if the destruction efficiency, E, is
equal to or greater than 95 percent.
(i) If the performance test is performed across the open or closed
biological treatment system only, compliance is demonstrated if E is
equal to Fbio, where E is the destruction efficiency of
partially soluble and/or soluble HAP compounds and Fbio is
the site-specific fraction of partially soluble and/or soluble HAP
compounds biodegraded. Fbio shall be determined as specified
in paragraph (e)(2)(iii)(E)(4) of this section and appendix C of subpart
G of this part.
(ii) If compliance is being demonstrated in accordance with
paragraphs (e)(2)(iii)(A)(5)(i) or (ii) of this section, the removal
efficiency shall be calculated using Equation 50 of this subpart. When
complying with paragraph (e)(2)(iii)(A)(5)(i) of this section, the
series of nonbiological treatment processes comprise one treatment
process segment. When complying with paragraph (e)(2)(iii)(A)(5)(ii) of
this section, each nonbiological treatment process is a treatment
process segment.
[GRAPHIC] [TIFF OMITTED] TR21SE98.046
Where:
QMWa,i = the soluble and/or partially soluble HAP load
entering a treatment process segment
QMWb,i = the soluble and/or partially soluble HAP load
exiting a treatment process segment
n = the number of treatment process segments
i = identifier for a treatment process element
QMWbio = the inlet load of soluble and/or partially soluble
HAP to the biological treatment process. The inlet is defined in
accordance with paragraph (e)(2)(iii)(A)(6) of this section. If
complying with paragraph (e)(2)(iii)(A)(6)(ii) of this section,
QMWbio is equal to QMWb,n
Fbio = site-specific fraction of soluble and/or partially
soluble HAP compounds biodegraded. Fbio shall be determined
as specified in paragraph (e)(2)(iii)(E)(4) of this section and Appendix
C of subpart G of this part.
QMWall = the total soluble and/or partially soluble HAP load
to be treated.
(4) Site-specific fraction biodegraded (Fbio). The
procedures used to determine the compound-specific kinetic parameters
for use in calculating Fbio differ for the compounds listed
in Tables 2 and 3 of this subpart. An owner or operator shall calculate
Fbio as specified in either paragraph (e)(2)(iii)(E)(4)(i) or
(ii) of this section.
(i) For biological treatment processes that do not meet the
definition for enhanced biological treatment in Sec. 63.1251, the owner or
operator shall determine the Fbio for the compounds in Tables
2 and 3 of this subpart using any of the procedures in appendix C to
part 63, except procedure 3 (inlet and outlet concentration
measurements). (The symbol ``Fbio'' represents the site-
specific fraction of an individual partially soluble or soluble HAP
compound that is biodegraded.)
(ii) If the biological treatment process meets the definition of
``enhanced biological treatment process'' in Sec. 63.1251, the owner or
operator shall determine Fbio for the compounds in Table 2 of
this subpart using any of the procedures specified in appendix C to part
63. The owner or operator shall calculate Fbio for the
compounds in Table 3 of this subpart using the defaults for first order
biodegradation rate constants (K1) in Table 9 of this subpart
and follow the procedure explained in Form III of appendix C, 40 CFR
part 63, or any of the procedures specified in appendix C of 40 CFR part
63.
[[Page 150]]
(F) Open or closed aerobic biological treatment processes: percent
removal for partially soluble or soluble HAP compounds. This paragraph
applies to the use of performance tests that are conducted for open or
closed aerobic biological treatment processes to demonstrate compliance
with the percent removal provisions for either partially soluble HAP
compounds in Sec. 63.1256(g)(8)(ii) or soluble HAP compounds in Sec.
63.1256(g)(9)(ii) or (g)(12). The owner or operator shall comply with
the provisions in paragraph (e)(2)(iii)(E) of this section, except that
compliance with Sec. 63.1256(g)(8)(ii) shall be demonstrated when E is
equal to or greater than 99 percent, compliance with Sec. 63.1256(g)(9)(ii)
shall be demonstrated when E is equal to or greater than 90 percent, and
compliance with Sec. 63.1256(g)(12) shall be demonstrated when E is equal
to or greater than 99 percent.
(G) Closed biological treatment processes: percent mass removal
option. This paragraph applies to the use of performance tests that are
conducted for closed biological treatment processes to demonstrate
compliance with the percent removal provisions in
Secs. 63.1256(g)(8)(ii), (g)(9)(ii), (g)(11), or (g)(12). The owner or
operator shall comply with the requirements specified in paragraphs
(e)(2)(iii)(G) (1) through (4) of this section.
(1) Comply with the procedures specified in paragraphs
(e)(2)(iii)(C) (1) through (3) of this section to determine
characteristics of the wastewater entering the biological treatment
unit, except that the term ``partially soluble and/or soluble HAP''
shall mean ``soluble HAP'' for the purposes of this section if the owner
or operator is complying with Sec. 63.1256(g)(9)(ii) or (g)(12), and it
shall mean ``partially soluble HAP'' if the owner or operator is
complying with Sec. 63.1256(g)(8)(ii).
(2) Comply with the procedures specified in paragraphs
(e)(2)(iii)(D) (4) through (6) of this section to determine the
characteristics of gas vent streams exiting a control device, with the
differences noted in paragraphs (e)(2)(iii)(G)(3) (i) and (ii) of this
section.
(i) The term ``partially soluble and/or soluble HAP'' shall mean
``soluble HAP'' for the purposes of this section if the owner or
operator is complying with Sec. 63.1256(g)(9)(ii) or (g)(12), and it shall
mean ``partially soluble HAP'' if the owner or operator is complying
with Sec. 63.1256(g)(8)(ii).
(ii) The term ``combustion treatment process'' shall mean ``control
device'' for the purposes of this section.
(3) Percent removal/destruction calculation. The percent removal and
destruction across the treatment unit and any control device(s) shall be
calculated using Equation 51 of this subpart:
[GRAPHIC] [TIFF OMITTED] TR21SE98.047
Where:
E = removal and destruction efficiency of the treatment unit and control
device(s), percent
QMWa, QMWb = mass flow rate of partially soluble
and/or soluble HAP compounds in wastewater entering (QMWa)
and exiting (QMWb) the treatment process, kilograms per hour
(as calculated using Equations 44 and 45)
QMGb = mass flow rate of partially soluble and/or soluble HAP
compounds in vented gas stream exiting the control device, kg/hr
(4) Compare mass removal/destruction efficiency to required
efficiency. Compare the mass removal/destruction efficiency (calculated
using Equation 51 of this subpart) to the required efficiency as
specified in Sec. 63.1256(g)(8)(ii), (g)(9)(ii), (g)(11), or (g)(12). If
complying with Sec. 63.1256(g)(8)(ii), compliance is demonstrated if the
mass removal/destruction is 99 percent or greater. If
[[Page 151]]
complying with Sec. 63.1256(g)(9)(ii), compliance is demonstrated if the
mass removal/destruction efficiency is 90 percent or greater. If
complying with Sec. 63.1256(g)(11), compliance is demonstrated if the mass
removal/destruction efficiency is 95 percent or greater. If complying
with Sec. 63.1256(g)(12), compliance is demonstrated if the mass removal/
destruction efficiency is 99 percent or greater.
(3) Compliance with control device provisions. Except as provided in
paragraph (e)(3)(iv) of this section, an owner or operator shall
demonstrate that each control device or combination of control devices
achieves the appropriate conditions specified in Sec. 63.1256(h)(2) by
using one or more of the methods specified in paragraphs (e)(3)(i),
(ii), or (iii) of this section.
(i) Performance test for control devices other than flares. This
paragraph applies to performance tests that are conducted to demonstrate
compliance of a control device with the efficiency limits specified in Sec.
63.1256(h)(2). If complying with the 95-percent reduction efficiency
requirement, comply with the requirements specified in paragraphs
(e)(3)(i) (A) through (J) of this section. If complying with the 20 ppm
by volume requirement, comply with the requirements specified in
paragraphs (e)(3)(i) (A) through (G) and (e)(3)(i)(J) of this section.
(A) General. The owner or operator shall comply with the general
performance test provisions in paragraphs (e)(2)(iii)(A) (1) through (4)
of this section, except that the term ``treatment unit'' shall mean
``control device'' for the purposes of this section.
(B) Sampling sites. Sampling sites shall be selected using Method 1
or 1A of 40 CFR part 60, appendix A, as appropriate. For determination
of compliance with the 95 percent reduction requirement, sampling sites
shall be located at the inlet and the outlet of the control device. For
determination of compliance with the 20 ppmv limit, the sampling site
shall be located at the outlet of the control device.
(C) Concentration in gas stream entering or exiting the control
device. The concentration of total organic HAP or TOC in a gas stream
shall be determined as provided in this paragraph. Samples may be grab
samples or composite samples (i.e., integrated samples). Samples shall
be taken at approximately equally spaced time intervals over a 1-hour
period. Each 1-hour period constitutes a run, and the performance test
shall consist of a minimum of three runs. Concentration measurements
shall be determined using Method 18 of 40 CFR part 60, appendix A.
Alternatively, any other test method validated according to the
procedures in Method 301 of appendix A of this part may be used.
(D) Volumetric flow rate of gas stream entering or exiting the
control device. The volumetric flow rate of the gas stream shall be
determined using Method 2, 2A, 2C, or 2D of 40 CFR part 60, appendix A,
as appropriate. Volumetric flow rate measurements shall be taken at the
same time as the concentration measurements.
(E) Calculation of TOC concentration. The owner or operator shall
compute TOC in accordance with the procedures in paragraph (a)(2) of
this section.
(F) Calculation of total organic HAP concentration. The owner or
operator determining compliance based on total organic HAP concentration
shall compute the total organic HAP concentration in accordance with the
provisions in paragraph (a)(2) of this section.
(G) Requirements for combustion control devices. If the control
device is a combustion device, the owner or operator shall correct TOC
and organic HAP concentrations to 3 percent oxygen in accordance with
the provisions in paragraph (a)(3) of this section, and demonstrate
initial compliance with the requirements for halogenated streams in
accordance with paragraph (a)(6) of this section.
(H) Mass rate calculation. The mass rate of either TOC (minus
methane and ethane) or total organic HAP for each sample run shall be
calculated using the following equations. Where the mass rate of TOC is
being calculated, all organic compounds (minus methane and ethane)
measured by methods specified in paragraph (e)(3)(i)(C) of this section
are summed using Equations 52 and 53 of this subpart. Where the mass
rate of total organic HAP is being calculated, only soluble and
partially
[[Page 152]]
soluble HAP compounds shall be summed using Equations 52 and 53.
[GRAPHIC] [TIFF OMITTED] TR21SE98.048
[GRAPHIC] [TIFF OMITTED] TR21SE98.049
Where:
CGa,i, CGb,i = concentration of TOC or total
organic HAP, in vented gas stream, entering (CGa,i) and
exiting (CGb,i) the control device, dry basis, ppmv
QMGa, QMGb = mass rate of TOC or total organic
HAP, in vented gas stream, entering (QMGa) and exiting
(QMGb) the control device, dry basis, kg/hr
Mwi = molecular weight of a component, kilogram/kilogram-mole
QGa,QGb = flow rate of gas stream entering
(QGa) and exiting (QGb) the control device, dry
standard cubic meters per hour
K2 = constant, 41.57 x 10-9 (parts per
million)-1 (gram-mole per standard cubic meter) (kilogram/
gram), where standard temperature (gram-mole per standard cubic meter)
is 20 C
i = identifier for a compound
n = number of components in the sample
(I) Percent reduction calculation. The percent reduction in TOC or
total organic HAP for each sample run shall be calculated using Equation
54 of this subpart:
[GRAPHIC] [TIFF OMITTED] TR21SE98.050
where:
E = destruction efficiency of control device, percent
QMGa,QMGb = mass rate of TOC or total organic HAP,
in vented gas stream entering and exiting (QMGb) the control
device, dry basis, kilograms per hour
(J) Compare mass destruction efficiency to required efficiency. If
complying with the 95-percent reduction efficiency requirement,
compliance is demonstrated if the mass destruction efficiency
(calculated in Equation 51 of this subpart) is 95 percent or greater. If
complying with the 20 ppmv limit, compliance is demonstrated if the
outlet TOC concentration is 20 ppmv, or less.
(ii) Design evaluation. A design evaluation conducted in accordance
with the provisions in paragraph (a)(1) of this section. Compounds that
meet the requirements specified in paragraph (e)(2)(iii)(A)(4) of this
section are not required to be included in the design evaluation.
(iii) Compliance demonstration for flares. When a flare is used to
comply with Sec. 63.1256(h), the owner or operator shall comply with the
flare provisions in Sec. 63.11(b). An owner or operator is not required to
conduct a performance test to determine percent emission reduction or
outlet organic HAP or TOC concentration when a flare is used.
(iv) Exemptions from compliance demonstrations. An owner or operator
using any control device specified in paragraph (a)(4) of this section
is exempt from the requirements in paragraphs (e)(3)(i) through
(e)(3)(iii) of this section and from the requirements in Sec. 63.6(f).
(f) Pollution prevention alternative standard. The owner or operator
shall demonstrate compliance with Sec. 63.1252(e)(2) using the procedures
described in paragraph (f)(1) and (f)(3) of this section. The owner or
operator shall demonstrate compliance with Sec. 63.1252(e)(3) using the
procedures described in paragraphs (f)(2) and (f)(3) of this section.
[[Page 153]]
(1) Compliance is demonstrated when the annual kg/kg factor,
calculated according to the procedure in paragraphs (f)(1)(i) and (iii)
of this section, is reduced by at least 75 percent as calculated
according to the procedure in paragraph (f)(1)(i) and (ii) of this
section.
(i) The production-indexed HAP consumption factors shall be
calculated by dividing annual consumption of total HAP by the annual
production rate, per process. The production-indexed total VOC
consumption factor shall be calculated by dividing annual consumption of
total VOC by the annual production rate, per process.
(ii) The baseline factor is calculated from yearly production and
consumption data for the first 3-year period in which the PMPU was
operational, beginning no earlier than the 1987 calendar year, or for a
minimum period of 12 months from startup of the process until the
present in which the PMPU was operational and data are available,
beginning no earlier than the 1987 calendar year.
(iii) The annual factor is calculated on the following bases:
(A) For continuous processes, the annual factor shall be calculated
every 30 days for the 12-month period preceding the 30th day (30-day
rolling average).
(B) For batch processes, the annual factor shall be calculated
either every 10 batches for the 12-month period preceding the 10th batch
(10-batch rolling average) or a maximum of once per month, if the number
of batches is greater than 10 batches per month. The annual factor shall
be calculated every 5 batches if the number of batches is less than 10
for the 12-month period preceding the 10th batch and shall be calculated
every year if the number of batches is less than 5 for the 12-month
period preceding the 5th batch.
(2) Compliance is demonstrated when the requirements of paragraphs
(f)(2)(i) through (iv) of this section are met.
(i) The annual kg/kg factor, calculated according to the procedure
in paragraphs (f)(1)(i) and (f)(1)(iii) of this section, is reduced to a
value equal to or less than 50 percent of the baseline factor calculated
according to the procedure in paragraphs (f)(1)(i) and (ii) of this
section.
(ii) The yearly reductions associated with add-on controls that meet
the criteria of Secs. 63.1252(h)(3)(ii)(A) through (D) must be equal to
or greater than the amounts calculated in paragraphs (f)(2)(ii)(A) and
(B) of this section:
(A) The mass of HAP calculated using Equation 55 of this subpart:
[GRAPHIC] [TIFF OMITTED] TR29AU00.008
Where:
[kg/kg]b = the baseline production-indexed HAP consumption
factor, in kg/kg
Mprod = the annual production rate, in kg/yr
M = the annual reduction required by add-on controls, in kg/yr
PR = the fractional reduction in the annual kg/kg factor
achieved using pollution prevention where PR is [ge]0.5
(B) The mass of VOC calculated using Equation 56 of this subpart:
VOC reduced = (VFbase - VFP -
VFannual) x Mprod (Eq. 56)
Where:
VOCreduced = required VOC emission reduction from add-on
controls, kg/yr
VFbase = baseline VOC factor, kg VOC emitted/kg production
VFp = reduction in VOC factor achieved by pollution
prevention, kg VOC emitted/kg production
VFannual = target annual VOC factor, kg VOC emitted/kg
production
Mprod = production rate, kg/yr
(iii) Demonstration that the criteria in Sec. 63.1252(e)(3)(ii)(A)
through (D) are met shall be accomplished through a description of the
control device and of the material streams entering and exiting the
control device.
[[Page 154]]
(iv) The annual reduction achieved by the add-on control shall be
quantified using the methods described in Sec. 63.1257(d).
(3) Each owner or operator of a PMPU complying with the P2 standard
shall prepare a P2 demonstration summary that shall contain, at a
minimum, the following information:
(i) Descriptions of the methodologies and forms used to measure and
record daily consumption of HAP compounds reduced as part of the P2
standard.
(ii) Descriptions of the methodologies and forms used to measure and
record daily production of products which are included in the P2
standard.
(iii) Supporting documentation for the descriptions provided in
paragraphs (f)(3)(i) and (ii) including, but not limited to, operator
log sheets and copies of daily, monthly, and annual inventories of
materials and products.
(g) Compliance with storage tank provisions by using emissions
averaging. An owner or operator with two or more affected storage tanks
may demonstrate compliance with Sec. 63.1253, as applicable, by fulfilling
the requirements of paragraphs (g)(1) through (4) of this section.
(1) The owner or operator shall develop and submit for approval an
Implementation Plan containing all the information required in Sec.
63.1259(e) 6 months prior to the compliance date of the standard. The
Administrator shall have 90 days to approve or disapprove the emissions
averaging plan after which time the plan shall be considered approved.
(2) The annual mass rate of total organic HAP (ETi,
ETo) shall be calculated for each storage tank included in
the emissions average using the procedures specified in paragraph
(c)(1), (2), or (3) of this section.
(3) Equations 57 and 58 of this subpart shall be used to calculate
total HAP emissions for those tanks subject to Sec. 63.1253(b) or (c):
[GRAPHIC] [TIFF OMITTED] TR21SE98.051
[GRAPHIC] [TIFF OMITTED] TR21SE98.052
Where:
Eij = yearly mass rate of total HAP at the inlet of the
control device for tank j
Eoj = yearly mass rate of total HAP at the outlet of the
control device for tank j
ETi = total yearly uncontrolled HAP emissions
ETo = total yearly actual HAP emissions
n = number of tanks included in the emissions average
(4) The overall percent reduction efficiency shall be calculated as
follows:
[GRAPHIC] [TIFF OMITTED] TR21SE98.053
where:
R = overall percent reduction efficiency
D = discount factor = 1.1 for all controlled storage tanks
(h) Compliance with process vent provisions by using emissions
averaging. An owner or operator with two or more affected processes
complying with Sec. 63.1254 by using emissions averaging shall demonstrate
compliance with paragraphs (h)(1), (2) and (3) of this section.
(1) The owner or operator shall develop and submit for approval an
Implementation Plan at least 6 months prior to the compliance date of
the standard containing all the information required in Sec. 63.1259(e).
The Administrator shall have 90 days to approve or disapprove the
emissions averaging plan. The plan shall be considered approved if the
Administrator either approves the plan in writing, or fails to
disapprove the plan in writing. The 90-day period shall begin when the
Administrator receives the request. If the request is denied, the owner
or operator must still be in compliance with the standard by the
compliance date.
(2) Owners or operators shall calculate uncontrolled and controlled
emissions of HAP by using the methods specified in paragraph (d)(2) and
(3) of this section for each process included in the emissions average.
(3) Equations 60 and 61 of this subpart shall be used to calculate
total HAP emissions:
[[Page 155]]
[GRAPHIC] [TIFF OMITTED] TR29AU00.009
[GRAPHIC] [TIFF OMITTED] TR29AU00.010
Where:
EUi = yearly uncontrolled emissions from process i.
ECi = yearly actual emissions for process i.
ETU = total yearly uncontrolled emissions.
ETC = total yearly actual emissions.
n = number of processes included in the emissions average.
(4) The overall percent reduction efficiency shall be calculated
using Equation 62 of this subpart:
[GRAPHIC] [TIFF OMITTED] TR21SE98.056
where:
R = overall percent reduction efficiency
D = discount factor = 1.1 for all controlled emission points
[63 FR 50326, Sept. 21, 1998, as amended at 65 FR 52609, Aug. 29, 2000;
66 FR 40134, Aug. 2, 2001]