[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: 40CFR63.1297]

[Page 215-218]
 
                   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 III--National Emission Standards for Hazardous Air Pollutants 
                for Flexible Polyurethane Foam Production
 
Sec. 63.1297  Standards for slabstock flexible polyurethane foam production--HAP ABA emissions from the production line.

    (a) Each owner or operator of a new or existing slabstock affected 
source complying with the emission point specific limitation option 
provided in Sec. 63.1293(a)(1) shall control HAP ABA emissions from the 
slabstock polyurethane foam production line in accordance with the 
provisions in this section. Compliance shall be determined on a rolling 
annual basis as described in paragraph (a)(1) of this section. As an 
alternative, the owner or operator can determine compliance on a monthly 
basis, as described in paragraph (a)(2) of this section.
    (1) Rolling annual compliance. In determining compliance on a 
rolling annual basis, actual HAP ABA emissions shall be compared to 
allowable HAP ABA emissions for each consecutive 12-month period. The 
allowable HAP ABA emission level shall be calculated based on the 
production for the 12-month period, resulting in a potentially different 
allowable level for each 12-month period. Compliance shall be determined 
each month for the previous 12-month period. The compliance requirements 
are provided in paragraph (b) of this section.
    (2) Monthly compliance alternative. As an alternative to determining 
compliance on a rolling annual basis, an owner or operator can determine 
compliance by comparing actual HAP ABA emissions to allowable HAP ABA 
emissions for each month. The allowable HAP ABA emission level shall be 
calculated based on the production for the month, resulting in a 
potentially different allowable level each month. The requirements for 
this monthly compliance alternative are provided in paragraph (c) of 
this section.
    (3) Each owner or operator electing to change between the compliance 
methods described under paragraphs (a)(1) and (a)(2) of this section 
shall notify the Administrator no later than 180 calendar days prior to 
the change.

[[Page 216]]

    (b) Rolling annual compliance. At each slabstock foam production 
source complying with the rolling annual compliance provisions described 
in paragraph (a)(1) of this section, actual HAP ABA emissions shall not 
exceed the allowable HAP ABA emission level for a consecutive 12-month 
period. The actual HAP ABA emission level for a consecutive 12-month 
period shall be determined using the procedures in paragraph (b)(1) of 
this section, and the allowable HAP ABA emission level for the 
corresponding 12-month period shall be calculated in accordance with 
paragraph (b)(2) of this section.
    (1) The actual HAP ABA emissions for a 12-month period shall be 
calculated as the sum of actual monthly HAP ABA emissions for each of 
the individual 12 months in the period. Actual monthly HAP ABA emissions 
shall be equal to the amount of HAP ABA added to the slabstock foam 
production line at the mixhead, determined in accordance with Sec. 
63.1303(b), unless a recovery device is used. Slabstock foam production 
sources using recovery devices to reduce HAP ABA emissions shall 
determine actual monthly HAP ABA emissions using the procedures in 
paragraph (e) of this section.
    (2) The allowable HAP ABA emissions for a consecutive 12-month 
period shall be calculated as the sum of allowable monthly HAP ABA 
emissions for each of the individual 12 months in the period. Allowable 
HAP ABA emissions for each individual month shall be calculated using 
Equation 2.
[GRAPHIC] [TIFF OMITTED] TR07OC98.004

Where:
emissallow,month = Allowable HAP ABA emissions from the 
slabstock foam production source for the month, pounds.
m = Number of slabstock foam production lines.
polyoli = Amount of polyol used in the month in the 
production of foam grade i on foam production line j, determined in 
accordance with paragraph (b)(3) of this section, pounds.
n = Number of foam grades produced in the month on foam production line 
j.
limiti = HAP ABA formulation limit for foam grade i, parts 
HAP ABA per 100 parts polyol. The HAP ABA formulation limits are 
determined in accordance with paragraph (d) of this section.
    (3) The amount of polyol used for specific foam grades shall be 
based on the amount of polyol added to the slabstock foam production 
line at the mixhead, determined in accordance with the provisions of Sec. 
63.1303(b).
    (c) Monthly compliance alternative. At each slabstock foam 
production source complying with the monthly compliance alternative 
described in paragraph (a)(2) of this section, actual HAP ABA emissions 
shall not exceed the corresponding allowable HAP ABA emission level for 
the same month. The actual monthly HAP ABA emission level shall be 
determined using the procedures in paragraph (c)(1) of this section, and 
the allowable monthly HAP ABA emission level shall be calculated in 
accordance with paragraph (c)(2) of this section.
    (1) The actual monthly HAP ABA emissions shall be equal to the 
amount of HAP ABA added to the slabstock foam production line at the 
mixhead, determined in accordance with Sec. 63.1303(b), unless a recovery 
device is used. Slabstock foam production sources using recovery devices 
to reduce HAP ABA emissions shall determine actual monthly HAP ABA 
emissions using the procedures in paragraph (e) of this section.
    (2) The allowable HAP ABA emissions for the month shall be 
determined in accordance with Equation 2 of this section.
    (d) HAP ABA formulation limitations. For each grade, the HAP ABA 
formulation limitation shall be determined in

[[Page 217]]

accordance with paragraphs (d)(1) through (d)(3) of this section. For 
any grade, the owner or operator may designate zero as the HAP ABA 
formulation limitation and not determine the HAP ABA formulation 
limitation in accordance with paragraphs (d)(1) through (d)(3) of this 
section.
    (1) For existing sources, the HAP ABA formulation limitation for 
each grade of slabstock foam produced shall be determined using Equation 
3 of this section. Zero shall be the formulation limitation for any 
grade of foam where the result of the formulation limitation equation 
(Equation 3) is negative (i.e., less than zero).
[GRAPHIC] [TIFF OMITTED] TR07OC98.005

Where:
ABAlimit= HAP ABA formulation limitation, parts HAP ABA 
allowed per hundred parts polyol (pph).
IFD = Indentation force deflection, pounds.
DEN = Density, pounds per cubic foot.
    (2) For new sources, the HAP ABA formulation limitation for each 
grade of slabstock foam produced shall be determined as described in 
paragraphs (d)(2)(i) through (d)(2)(iv) of this section and in Table 1 
of this subpart.
    (i) For each foam grade with a density of 0.95 pounds per cubic foot 
or less, the HAP ABA formulation limitation shall be determined using 
Equation 3. Zero shall be the formulation limitation for any grade of 
foam where the result of the formulation limitation equation (Equation 3 
of this section) is negative (i.e., less than zero).
    (ii) For each foam grade with a density of 1.4 pounds per cubic foot 
or less, and an IFD of 15 pounds or less, the HAP ABA formulation 
limitation shall be determined using Equation 3.
    (iii) For each foam grade with a density greater than 0.95 pounds 
per cubic foot and an IFD greater than 15 pounds, the HAP ABA 
formulation limitation shall be zero.
    (iv) For each foam grade with a density greater than 1.40 pounds per 
cubic foot, the HAP ABA formulation limitation shall be zero.
    (3) With the exception of those grades for which the owner or 
operator has designated zero as the HAP ABA formulation limitation, the 
IFD and density for each foam grade shall be determined in accordance 
with Sec. 63.1304(b) and recorded in accordance with Sec. 63.1307(c)(1)(i)(B) 
or Sec. 63.1307(c)(2)(i)(B) within 10 working days of the production of the 
foam.
    (e) Compliance using recovery devices. If a recovery device is used 
to comply with paragraphs (b) or (c) of this section, the owner or 
operator shall determine the allowable HAP ABA emissions for each month 
using Equation 2 in paragraph (b)(2) of this section, and the actual 
monthly HAP ABA emissions in accordance with paragraph (e)(1) of this 
section. The owner or operator shall also comply with the provisions of 
paragraph (e)(2) of this section.
    (1) The actual monthly HAP ABA emissions shall be determined using 
Equation 4:
[GRAPHIC] [TIFF OMITTED] TR07OC98.006

Where:
Eactual = Actual HAP ABA emissions after control, pounds/
month.
Eunc = Uncontrolled HAP ABA emissions, pounds/month, 
determined in

[[Page 218]]

accordance with paragraph (b)(1) of this section.
HAPABArecovered = HAP ABA recovered, pounds/month, determined 
in accordance with paragraph (e)(2) of this section.
    (2) The amount of HAP ABA recovered shall be determined in 
accordance with Sec. 63.1303(c).