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FOOTNOTES
a Both boiler capacities and throughputs must be reported to NEDS for all
boilers.
b Particulate emissions from residual oil combustion can be more accurately
estimated from the equation LB/1000 Gallon = 10S + 3. See AP-42, page
1.3.2.
c Fugitive emissions occur from numerous locations within industrial facili-
ties, as of 1978, most of these sources have not been fully characterized.
To allow these fugitive sources to be represented in NEDS, common SCC
codes have been developed. These codes should be used in addition to the
main process SCC codes associated with the facility. Specific fugitive
emissions that have been characterized are also contained in this table.
d Manufacture of inorganic pigments is classified under SCC 3-01-035-**.
e For molded and fabricated rubber and plastics products, see SCC 3-08-***-**,
3-30-002-**, and 4-02-002-**.
f Also applies to the sulfur recovery plant at petroleum refineries and
natural gas production fields.
9 Grain processing and milling are included in SCC's 3-02-007-** thru
3-02-008-**. For grain elevators, see SCC 3-02-005-**, 3-02-006-**, and
3-02-031-**.
n Units refer to amount of grain processed through each operation. If only
the total amount of grain received or shipped is known, see AP-42, Table
6.4-2 for typical ratios of tons processed to tons shipped or received.
1 The particulate emission factor is on emissions at the inlet to the baghouse
or other control device. Indicate the control device and efficiency to
properly estimate the actual emissions.
J Codes 3-03-003-09, -10, and -11 represent individual operations within
this SCC (3-03-003-07).
k Represents total CO generated, report control equipment as 022 for CO
boiler or 060 for process gas recovery to properly account for actual
emissions.
1 Represents total CO generated, report control equipment as 022 for CO
boiler or 023 for flaring to properly account for actual emissions.
m Apply for all metallic minerals except as noted. Low moisture ore is de-
fined as having less than 4 percent moisture content by weight for ore
entering the primary crusher. High moisture ore has over 4 percent by
weight.
123
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FOOTNOTES (continued)
n Emission factor does not apply to bauxite ore.
0 Emission factor does not apply to drying of titanium/zirconium sands. See
SCC 3-03-012-** for titanium processing.
P Does not correct for PE Index, see AP-42, Section 11.2.3.
9 Use kiln code and appropriate 3-90 code for fuel used in kilns to properly
account for all SOX emissions.
r These SCC codes are also applicable to Coal Cleaning Operations at power
plants.
5 Expressed as emission rate at point of release. For uncontrolled sources,
to account for emissions that settle out within the plant, code a ficti-
tinus control device code for particulate of 006 (low efficiency gravit-
ational collector) with appropriate control efficiency. See AP-42,
Section 8.2.0 for table of typical control efficiencies for gravita-
tional settling.
t Several processes that routinely occur in Major Group 29 can be found under
other Major Groups. Specifically, note the following:
o waste or process gas and/or liquid fired boilers - SCC 1-02-***-**.
o internal combustion compressor engines - SCC 2-02-***-**.
o amine sweeting process - SCC 3-10-002-**.
o sulfur recovery process - SCC 3-01-032-**.
o sulfuric acid plant - SCC 3-01-022-** or 3-01-023-**.
u Represents total CO and VOC generated. Report control device as 022 if CO
boiler is present to properly account for actual emissions.
v Units expressed as the equivalent number of valves, seals, flanges, or
drains in the refinery on an annual operating basis (8,760 hours/year).
For example, if there are 1,000 seals, all operating 8,760 hours/year,
then operating rate = 1,000. However, if the average operating time is
6,570 hours/year (3/4 of the total hours in a year), then operating rate
= 1,000 x (6,570 -r8,760) = 750 seals. All counts of valves, seals,
flanges, and drains should be similarly adjusted to account for the
average annual hours of operation in the refinery.
w Process changes may include such measures as raising the pH of the cooking
liquor, thereby lowering the free S02, relieving the pressure in the di-
gester before the contents are discharged, and pumping out the digester
contents instead of blowing them out.
x For Surface Coating Operations, see SCC 4-02-019-** and 4-02-021-**.
y For tire retreading operations, see SCC 3-08-005-**.
124
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FOOTNOTES (continued)
z The sulfur content of the fuel as F^S on a mole percent basis.
aa For rubberized fabric, see SCC 3-30-002-**.
bb For specific printing SCCs , see SCC 4-05-***-**.
cc In-process fuel codes must always be used in conjunction with the appropri-
ate process code.
dd A table of typical solvent densities can be found in Section 3, Chapter 16
of AEROS Volume V.
ee These solvents are estimated to be of negligible photochemical reactivity.
ff Use these SCCs to provide a rough estimate of emissions only when informat-
ion on the identity and/or quantity of make-up solvent used is not avail-
able.
99 These are general SCCs applicable to all industrial categories.
nn These solvents are used to thin coatings and thus should be used with one
of the coating codes.
ii This SCC should only be used to provide rough estimates of emissions for
cases when information on amount of fabric processed is not available.
JJ For surface coating of small appliances, see SCC 4-02-025-**, surface
coating of miscellaneous metal parts.
kk Includes Major Group 34 fabricated metal products, Major Group 35 small
appliances, and other coating operations Major Group 33-39 not specified
el sewhere.
11 The tank size of 67,000 and 250,000 BBLs. specified represent approximate
size ranges. The emission factors may be applied to tanks of approximately
the same size. See AP-42, Section 4.3-1.
mm Emission factors for the fixed roof storage tanks breathing loss are for
'new1 tank conditions only (i.e., Paint Factor = 1.0). For 'old1 tank
conditions the emission factor is increased by approxiamtely 13 percent
nn Emission factors for the floating roof storage tanks standing loss are for
'new' tank conditions only. For 'old' tank conditions the emission factor
is increased by approximately 229 percent(%).
oo These SCCs may be used to identify floating roof storage tanks as defined
in EPA Control Techniques Guidelines.
125
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FOOTNOTES (continued)
PP Emission factors for Floating Roof Storage Tanks Standing Loss are for the
'new1 tank conditions only. For 'old' tank conditions the emission factor
is increased by 127 percentU).
qq Bulk terminals are defined as facilities with daily throughputs of 20,000
gallons or more.
rr These solvents are often added by the user to the inks used in printing
processes. Thus, the solvent SCC's should not be used alone, but rather
in conjunction with a printing process SCC.
ss Bulk plants are defined as facilities with daily throughputs of 20,000
gallons or less.
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