Instructions for 2008 Air Toxics Emission Inventory Report 1

Instructions for 2008 Air Toxics Emission Inventory Report

Emission Units and Segments

Please submit air toxics emissions by emission units and segments. The emission units and segments should be consistent with those included in the annual air emission inventory (AEI). This helps identify gaps in the database and helps identify what activities produce air toxics. If air toxics were emitted from emission units and segments that were not included in AEI, you can add them in the submittal. If submitting air toxics by emission units and segments is not practical, please submit a facility total for each air toxic compound or group of compounds. Example report spreadsheets are available online at: (http://www.pca.state.mn.us/air/toxics/toxics-dataguidance.html/2008ATEI_Form_Regular.xls)

Pollutant list

The pollutants included in the 2008 air toxics emission inventory (ATEI) are listed in Table 1 (enclosed at the end of these instructions). Please identify pollutants by both chemical name and Chemical Abstracts Service (CAS) number, whenever possible. Using both the name and number of each pollutant will help to precisely identify the compounds emitted.

Recommendations for reporting data for specific groups of compounds

Recommendations for reporting data for specific groups of compounds are summarized below in a hierarchy of most preferred method to least preferred. For pollutant groups, only one reporting strategy per HAP group per source should be used. Simultaneous use of more than one reporting strategy (e.g., reporting both individual chromium compounds and total chromium for the same source) will result in the same emission being counted twice.

Metal and cyanide groups:

1. Report emissions and associated CAS numbers of all individual metal and cyanide compounds; e.g., report emissions and associated CAS numbers of arsenic oxide, lead arsenate, etc., rather than emissions of arsenic compounds as a whole. All individual compounds should be reported as the mass of the total compounds, not just the metal within the compound.

2. If individual metal compounds cannot be reported, a less preferred method for chromium, lead, mercury, and nickel is to separately report two forms of widely varying toxicity. If you use this approach, report only the mass of emissions of the metal, not of the entire metal compound.

• Chromium – Separate chromium compounds into trivalent (CAS #1606583) and hexavalent chromium (CAS #18540299). Since hexavalent compounds are listed individually, do not include reported hexavalent compounds as total chromium compounds. • Lead – Separate lead compounds into organic and inorganic. • Mercury – Separate mercury compounds into organic (CAS #22967926) and inorganic (CAS #7439976). • Nickel - Separate nickel compounds into nickel subsulfide (CAS #12035722) and other nickel (CAS #7440020). • For all other metal and cyanide groups, report total emissions of the group in terms of the mass of the metal or cyanide alone, and report under the CAS number of the metal or cyanide.

3. Alternatively, but far less preferred, report total emissions of the group in terms of mass of total compounds, not just the metal within the compounds. Report under the pollutant group for “metal compounds” or “cyanide

compounds.” To avoid the possibility of double counting emissions, do not include metals or cyanide already reported using the more preferred methods above.

Commonly reported individual pollutants in groups are listed in Table 2 (enclosed at the end of these instructions).

Dioxins/Furans: Clearly identify what you inventory as dioxins and furans.

1. Report mass emissions and associated CAS numbers of all individual congeners of both chlorinated dibenzodioxins (CDDs) and chlorinated dibenzofurans (CDFs).

2. If you cannot report individual CDD and CDF congeners, report dioxins and furans as 2,3,7,8- tetrachlorodibenzodioxin (TCDD) toxic equivalents (TEQ) under the HAP name “dioxins/furans as TEQ”. (Note: Although the CAA specifically lists only 2,3,7,8-TCDD as a HAP, other CDDs and CDFs qualify as HAPs within the POM group. Because some of these other congeners are also potent carcinogens, the TEQ approach will be used to evaluate CDDs and CDFs as a group.) Do not include dioxins/furans in the reporting of POM emissions.

3. If you cannot report emissions using the TEQ approach, report individual congener emissions where possible and report any remaining emissions as total “dioxins” or total “dibenzofurans.”

Glycol Ethers:

1. Report emissions for individual glycol ethers with their associated CAS numbers. Use the EPA’s guidance on glycol ethers to identify compounds that are glycol ethers. This guidance can be found in the Federal Register / Vol. 65, No. 149 / Wednesday, August 2, 2000 / Rules and Regulations.

These web sites can also help you determine which glycol ethers are HAPs and need to be reported: http://www.epa.gov/ttn/atw/glycol2000.pdf http://daq.stte.nc.us/toxics/glycol.

Note that, historically, many compounds have been mistakenly included in the glycol ethers compound group. Table 3 identifies some of these compounds that should not be included in the reporting.

2. If you cannot report individual glycol ether emissions, report total emissions of glycol ethers as a group under “glycol ethers.”

Commonly reported individual pollutants in this group are also listed in Table 2 (enclosed at the end of these instructions). Table 3 lists those compounds which are often mistaken as being glycol ethers.

Table 3. List of compounds often mistaken as glycol ethers Compound CAS Number 1,1- Dimethoxyethane 534-15-6 1-Ethoxy-2-propanol 1569-02-4 3-Ethoxy-1-propanol 111-35-3 Butyl Cellosolve 111-76-2 Diethylene glycol 111-46-6 Diethylene glycol di(3-aminopropyl) ether 4246-51-9 Dipropylene glycol monomethyl ether 34590-94-8 Glycols, polyethylene, polypropylene monobutylether (nonionic) 9038-95-3 Isopropyl glycol 109-59-1 Nonyl phenyl polyethylene glycol ether 9016-45-9 Propylene glycol methyl ether acetate 108-65-6 Propylene glycol monomethyl ether 107-98-2 Propylene glycol t-butyl ether

Compound CAS Number Triethylene glycol 112-27-6

Xylenes and Cresols:

1. Report emissions for individual xylene and cresol isomers with their associated CAS numbers. Do not report any emissions for total xylenes or cresols to avoid double counting.

2. If you cannot report individual emissions of xylenes or cresols, report total emissions of xylenes or cresols as a group under “xylenes (mixture of o, m, and p isomers)” (CAS #1330207) or “cresols/cresylic acids.”

Polycylic Organic Matter (POM): Clearly identify what you inventory as POM.

1. Report emissions and associated CAS numbers of as many individual POM compounds as possible, rather than as total PAH or total POM. Most important to report individually are the 7-PAH and 16-PAH compounds listed in Table 4. The 7-PAH and 16-PAH compounds are already listed in Table 1 individually. We also encourage the reporting of other individual POM compounds for which cancer assessments are available (also listed in Table 4).

2. If you cannot report all individual PAHs, then report 7-PAH as a subgroup.

3. If you cannot report emissions of individual POM, then report total POM (total POM includes total PAH). Since 16-PAH compounds are listed individually, do not include any individually reported 16-PAH compounds as total POM.

4. If you follow any other scheme than one listed in this hierarchy, clearly identify what it is.

Table 4. Groups of POM Compounds POM Compounds for which cancer

assessments are available - includes 7- 7-PAH 16-PAH PAH Benz(a)Anthracene Acenaphthene Dibenz[a,h]Acridine Benzo(a)Pyrene Acenaphthylene Dibenz[a,j]Acridine Benzo(b)Fluoranthene Anthracene 7H-Dibenzo[c,g]Carbazole Benzo(k)Fluoranthene Benz(a)Anthracene Dibenzo[a,e]Pyrene Chrysene Benzo(a)Pyrene Dibenzo[a,i]Pyrene Dibenz(a, h)Anthracene Benzo(b)Fluoranthene Dibenzo[a,l]Pyrene Indeno(1,2,3-c,d)Pyrene Benzo(g,h,i)Perylene 7,12-Dimethylbenz[a]Anthracene Benzo(k)Fluoranthene 1,6-Dinitropyrene Chrysene 1,8-Dinitropyrene Dibenz(a,h)Anthracene 3-Methylcholanthrene Fluoranthene 5-Methylchrysene Fluorene 5-Nitroacenaphthene Indeno(1,2,3-c,d)Pyrene 6-Nitrochrysene Naphthalene 2-Nitrofluorene Phenanthrene 2-Nitrofluorene Pyrene 1-Nitropyrene 4-Nitropyrene