DAQ-2024-010170

Factsheet August 2007

How to Estimate Your
Hazardous Air Pollutant Emissions

What are Hazardous Air Pollutants?

Hazardous air pollutants, which are known as HAPs, are chemicals that are known or
suspected causes of cancer, or other serious health problems, including damage to the
respiratory or nervous systems, birth defects, and reproductive effects. HAPs are released
by sources, such as auto body repair shops, dry cleaners, printing shop, surface coating
and painting operations, and motor vehicles (cars, trucks, buses, etc.). Refer to
Attachment C for a list of the 187 HAPs that are included in the Clean Air Act Amendments
of 1990.

What kind of information do I need to estimate HAP emissions?

You can determine if you have HAPs in the coating and cleaning products at your business
by looking on your Material Safety Data Sheets (MSDS). Contact your coating supplier for
free copies of your product MSDS, if you do not have copies at your business. For a list of
the HAPs that are listed in the 1990 Clean Air Act, contact the Division’s Small Business
Assistance Program (SBAP) or the Division’s Permitting section and ask for Attachment C,
Hazardous Air Pollutant List, of the Small Source Registration Notice (phone numbers
are listed below). The HAPs that are listed on Attachment C are the chemicals that should
be inventoried.

How do I estimate HAP emissions?

To estimate HAP emissions you will need the density or specific gravity, percent HAP (all
by weight percent), and coating use in gallons. If the density or specific gravity and percent
HAP information is not on the MSDS from your product supplier, then request it. If you use
many types of products, categorize the products you use into similar groups. For
example, an automotive refinishing shop may use the following categories: enamels,
lacquers, clean-up solvents, topcoats, primers, etc. A printing shop may use the following
categories: fountain solutions, inks, cleaning solutions, etc. A wood finishing shop may use
the following categories: washcoats, sealers, topcoats, stains, cleanup solvents, etc. After
categorizing your products, choose one product that is the most representative of that
category. Continue to Step 1 to estimate your HAP emissions, based on the information
supplied on the representative MSDS for each designated product category.
Utah Division of Air Quality „ Small Business Assistance Program „ 150 N. 1950 W., SLC, UT 84106
1-800-270-4440 (outside SLC) „ 801-536-4000 (SLC) „ FAX [phone]
Internet home page: http://www.deq.state.ut.us/EQAIR/PERMITS/psba.htm

Step 1: Enter the different product categories in Column A. Estimate the total
gallons of product that you use on an annual basis for each designated
product category and fill in the number in Column B. The gallons per year
can be estimated by recording what you use in an average month and
then multiplying by 12 to convert to annual basis.

Step 2: The pounds per gallon in Column C can be determined from your
representative MSDS for the product category. If the specific gravity
(S.G.) is given instead, use the following formula to calculate pounds per
gallon: S.G. X 8.3 lbs/gal. The S.G. will be in the range of 0.8 to 1.3. For
example, most solvents are less than 1.0 since they are less dense than
water, which has a S.G. of 1.0.

Step 3: Multiply the gallons per year in Column B by the pounds per gallon given
in Column C. Fill in the number in Column D.

Step 4: Using your representative MSDS, compare all the chemicals listed on the
MSDS to the list of 187 hazardous air pollutants (HAPs) list on
Attachment C of the Small Source Registration Notice. List all the HAPs
and percent by weight in the space provided in Column E. If the MSDS
gives a range of 10-20% for a chemical, use the midpoint of 15%. Convert
the percentage (15%) to a fraction (.15) and enter in column E. Keep in
mind that an MSDS lists many chemicals that are not HAPs.

Step 5: To determine the pounds per year for each HAP in a product category,
multiply the pounds per year in Column D by the fraction in Column E.
Enter the number in the space provided in Column E.

Step 6: Add the pounds per year for each HAP in Column E and enter the total at
the bottom of the table. Enter the pounds per year for all HAPs (grand
total) in Box X. If you need more than three columns for HAPs, tape two
worksheets together.

Hazardous Air Pollutants Emission Worksheet

Column A

Column B

Column C

Column D

Column E

Chemical Products Used

(Name of HAP)

(Name of HAP)

(Name of HAP)

(Name of HAP)
Product Categories
(paints, glues, solvents)

Gallons Per
Year

Pounds Per
Gallon

Pounds Per
Year

Fraction

Pounds
Per Year

Fraction

Pounds
Per Year

Fraction

Pounds
Per Year

Fraction
Pounds
Per Year

Sub-
Total
(1) :

Sub-
Total
(2) :

Sub-
Total
(3) :

Sub-
Total
(4) :

Box X (Pounds Per Year) Grand Total ( 1+2+3+4 ) :

File: U:\aq\engineer\opp-sbap\guides\hap\hapfact

Hazardous Air Pollutants Emission Worksheet

Column A

Column B

Column C

Column D

Column E

Chemical Products Used

Xylene
(Name of HAP)

Toluene
(Name of HAP)

Methylene Chloride
(Name of HAP)
(Name of HAP)
Product Categories
(paints, glues, solvents)

Gallons Per
Year

Pounds Per
Gallon

Pounds Per
Year

Fraction

Pounds
Per Year

Fraction

Pounds
Per Year

Fraction

Pounds
Per Year

Fraction
Pounds
Per Year
Precoats

200

6.5

1,300

Primer Surfacers

150

7.5

1,125

0.10

112

0.25

280

Primer Sealers

100

9.5

950

0.20

190

Solvents

125

6.2

775

0.10

77

Topcoats

75

9.5

712

0.30

214

Specialty

40

8.0

320

0.05

16

0.15

48

Sub-
Total
(1) :

128

Sub-
Total
(2) :

481

Sub-
Total
(3) :

328

Sub-
Total
(4) :

937

Box X (Pounds Per Year) Grand Total ( 1+2+3+4 ) :

Utah Division of Air Quality
Attachment C: Hazardous Air Pollutant List

Below is a list of the 187 hazardous air pollutants (HAPs) that are regulated by the Clean Air
Act Amendments (CAA) of 1990. Please indicate which pollutants are emitted by your
business by checking the appropriate box(es) below. Provide an estimate of the expected
annual and potential to emit emissions of HAPs and record in Section IV, Air Emission
Information, of the Small Source Registration Notice.

† 75-07-0 Acetaldehyde
† 60-35-5 Acetamide
† 75-05-8 Acetonitrile
† 98-86-2 Acetophenone
† 53-96-3 2-Acetylaminofluorene
† 107-02-8 Acrolein
† 79-06-1 Acrylamide
† 79-10-7 Acrylic acid
† 107-13-1 Acrylonitrile
† 107-05-1 Allyl chloride
† 92-67-1 4-Aminobiphenyl
† 62-53-3 Aniline
† 90-04-0 o-Anisidine
† Varies Antimony Compounds
† Varies Arsenic Compounds (inorganic including
arsine)
† 1332-21-4 Asbestos

† 71-43-2 Benzene (including benzene from
gasoline)
† 92-87-5 Benzidine
† 98-07-7 Benzotrichloride
† 100-44-7 Benzyl chloride
† Varies Beryllium Compounds
† 92-52-4 Biphenyl
† 542-88-1 Bis(chloromethyl)ether
† 117-81-7 Bis(2-ethylhexyl)phthalate (DEHP)
† 75-25-2 Bromoform
† 106-99-0 1,3-Butadiene

† Varies Cadmium Compounds
† 156-62-7 Calcium cyanamide
† 133-06-2 Captan
† 63-25-2 Carbaryl
† 75-15-0 Carbon disulfide
† 56-23-5 Carbon tetrachloride
† 463-58-1 Carbonyl sulfide
† 120-80-9 Catechol
† 57-74-9 Chlordane
† 133-90-4 Chloramben
† 7782-50-5 Chlorine
† 79-11-8 Chloroacetic acid
† 532-27-4 2-Chloroacetophenone
† 108-90-7 Chlorobenzene
† 510-15-6 Chlorobenzilate
† 67-66-3 Chloroform
† 126-99-8 Chloroprene
† 107-30-2 Chloromethyl methyl ether
† Varies Chromium Compounds
† Varies Cobalt Compounds
† Varies Coke Oven Emissions

† 108-39-4 m-Cresol
† 95-48-7 o-Cresol
† 106-44-5 p-Cresol
† 1319-77-3 Cresols/Cresylic acid (isomers and mixture)
† 98-82-8 Cumene
† Varies Cyanide Compounds

† 94-75-7 2,4-D (2,4Dichlorophenoxyacetic acid,
including salts and esters)
† 72-55-9 DDE (1, 1-Dichloro-2, 2-Bis(p-
Chlorophenyl) Ethylene)
† 334-88-3 Diazomethane
† 132-64-9 Dibenzofurans
† 96-12-8 1,2-Dibromo-3-chloropropane
† 84-74-2 Dibutylphthalate
† 106-46-7 1,4-Dichlorobenzene(p)
† 91-94-1 3,3-Dichlorobenzidene
† 111-44-4 Dichloroethyl ether (Bis(2-chloroethyl)ether)
† 542-75-6 1,3-Dichloropropene
† 62-73-7 Dichlorvos
† 111-42-2 Diethanolamine
† 121-69-7 N,N-Diethyl aniline (N,N-Dimethylaniline)
† 64-67-5 Diethyl sulfate
† 534-52-1 4,6-Dinitro-o-cresol, and salts
† 51-28-5 2,4-Dinitrophenol
† 121-14-2 2,4-Dinitrotoluene
† 60-11-7 Dimethyl aminoazobenzene
† 79-44-7 Dimethyl carbamoyl chloride
† 68-12-2 Dimethyl formamide
† 57-14-7 1,1-Dimethyl hydrazine
† 131-11-3 Dimethyl phthalate
† 77-78-1 Dimethyl sulfate
† 119-90-4 3,3-Dimethoxybenzidine
† 119-93-7 3,3',-Dimethyl benzidine
† 123-91-1 1,4-Dioxane (1,4-Diethyleneoxide)
† 122-66-7 1,2-Diphenylhydrazine

† 106-89-8 Epichlorohydrin
(l-Chloro-2,3-epoxypropane)
† 106-88-7 1,2-Epoxybutane
† 140-88-5 Ethyl acrylate
† 100-41-4 Ethyl benzene
† 51-79-6 Ethyl carbamate (Urethane)
† 75-00-3 Ethyl chloride (Chloroethane)
† 106-93-4 Ethylene dibromide (Dibromoethane)
† 107-06-2 Ethylene dichloride (1,2-Dichloroethane)
† 107-21-1 Ethylene glycol
† 151-56-4 Ethylene imine (Aziridine)
† 75-21-8 Ethylene oxide
† 96-45-7 Ethylene thioure

† 75-34-3 Ethylidene dichloride (1,1-Dichloroethane)

† Varies Fine mineral fibers

† Varies Glycol ethers

† 76-44-8 Heptachlor

† 50-00-0 Formaldehyde
† 118-74-1 Hexachlorobenzene
† 87-68-3 Hexachlorobutadiene
† 77-47-4 Hexachlorocyclopentadiene
† 67-72-1 Hexachloroethane
† 822-06-0 Hexamethylene-1,6-diisocyanate
† 680-31-9 Hexamethylphosphoramide
† 110-54-3 Hexane
† 302-01-2 Hydrazine
† 7647-01-0 Hydrochloric acid (Hydrogen chloride)
† 7664-39-3 Hydrogen fluoride (Hydrofluoric acid)
† 123-31-9 Hydroquinone

† 78-59-1 Isophorone

† Varies Lead Compounds
† 58-89-9 Lindane (all isomers)

† 108-31-6 Maleic anhydride
† Varies Manganese Compounds
† Varies Mercury Compounds
† 67-56-1 Methanol
† 72-43-5 Methoxychlor
† 74-83-9 Methyl bromide (Bromomethane)
† 74-87-3 Methyl chloride (Chloromethane)
† 71-55-6 Methyl chloroform (1,1,1-Trichloroethane)
† 60-34-4 Methyl hydrazine
† 74-88-4 Methyl iodide (Iodomethane)
† 108-10-1 Methyl isobutyl ketone (Hexone)
† 624-83-9 Methyl isocyanate
† 80-62-6 Methyl methacrylate
† 1634-04-4 Methyl tert butyl ether
† 101-14-4 4,4-Methylene bis(2-chloroaniline)
† 75-09-2 Methylene chloride (Dichloromethane)
† 101-68-8 Methylene diphenyl diisocyanate (MDI)
† 101-77-9 4,4,-Methylenedianiline

† 91-20-3 Naphthalene
† Varies Nickel Compounds
† 98-95-3 Nitrobenzene
† 100-02-7 4-Nitrophenol
† 79-46-9 2-Nitropropane
† 684-93-5 N-Nitroso-N-methylurea
† 59-89-2 N-Nitrosomorpholine
† 62-75-9 N-Nitrosodimethylamine
† 92-93-3 4-Nitrobiphenyl

† 56-38-2 Parathion
† 82-68-8 Pentachloronitrobenzene (Quintobenzene)
† 87-86-5 Pentachlorophenol
† 108-95-2 Phenol
† 106-50-3 p-Phenylenediamine
† 75-44-5 Phosgene
† 7803-51-2 Phosphine
† 7723-14-0 Phosphorus
† 85-44-9 Phthalic anhydride
† 1336-36-3 Polychlorinated biphenyls (Aroclors)
† Varies Polycylic Organic Matter
† 1120-71-4 1,3-Propane sultone
† 57-57-8 beta-Propiolactone
† 123-38-6 Propionaldehyde
† 114-26-1 Propoxur (Baygon)
† 75-55-8 1,2-Propylenimine (2-Methyl aziridine)
† 78-87-5 Propylene dichloride (1,2-Dichloropropane)
† 75-56-9 Propylene oxide

† 91-22-5 Quinoline
† 106-51-4 Quinone

† Varies Radionuclides (including radon)

† Varies Selenium Compounds
† 96-09-3 Styrene oxide
† 100-42-5 Styrene

† 1746-01-6 2,3,7,8-Tetrachlorodibenzo-p-dioxin
† 79-34-5 1,1,2,2-Tetrachloroethane
† 127-18-4 Tetrachloroethylene (Perchloroethylene)
† 7550-45-0 Titanium tetrachloride
† 108-88-3 Toluene
† 95-80-7 2,4-Toluene diamine
† 584-84-9 2,4-Toluene diisocyanate
† 95-53-4 o-Toluidine
† 8001-35-2 Toxaphene (chlorinated camphene)
† 120-82-1 1,2,4-Trichlorobenzene
† 79-00-5 1,1,2-Trichloroethane
† 79-01-6 Trichloroethylene
† 95-95-4 2,4,5-Trichlorophenol
† 88-06-2 2,4,6-Trichlorophenol
† 121-44-8 Triethylamine
† 1582-09-8 Trifluralin
† 540-84-1 2,2,4-Trimethylpentane

† 108-05-4 Vinyl acetate
† 593-60-2 Vinyl bromide
† 75-01-4 Vinyl chloride
† 75-35-4 Vinylidene chloride (1,1-Dichloroethylene)

† 1330-20-7 Xylenes (isomers and mixture)
† 108-38-3 m-Xylenes
† 95-47-6 o-Xylenes
† 106-42-3 p-Xylenes

NOTE: For all listings above which contain
the word "compounds" and for glycol ethers,
the following applies: Unless otherwise
specified, these listings are defined as
including any unique chemical substance
that contains the named chemical (i.e.,
antimony, arsenic, etc.) as part of that
chemical's infrastructure. Polymers are
excluded from the glycol category.