250 R.I. Code R. 250-RICR-120-05-22.9

Current through November 7, 2024

Section 250-RICR-120-05-22.9 - Table I Acceptable Ambient Levels

Table I Acceptable Ambient Levels (AALs) (µg/m3)
CHEMICAL NAME	CAS #	1-hour	24-hour	Annual
Acetaldehyde	75070	0.5
Acetamide	60355	0.05
Acetonitrile	75058	60
Acetophenone	98862	300
2-Acetylaminofluorene	53963	0.0008
Acrolein	107028	0.2	0.02
Acrylamide	79061	0.0008
Acrylic Acid	79107	6,000	1
Acrylonitrile	107131	200	0.01
Aldrin	309002	7	0. 1	0.00002
Allyl Chloride	107051	1
2-Aminoanthraquinone	117793	0.1
4-Aminobiphenyl	92671	0.0002
Ammonia	7664417	1,000	100	70
Aniline	62533	1	0.6
o-Anisidine	90040	0.02
Antimony & compounds, except trioxidea	0.2
Antimony trioxide	1309644	0.2	0.02
Aramite	140578	0.1
Arsenic & compoundsa (inorganic)	0.2	0.0002
Arsine	7784421	200	0.05
Asbestos	1332214	4b
Azobenzene	103333	0.03
Barium	7440393	700
Benzene	71432	30	20	0.1
Benzidine	92875	0.00002
Benzoic acid	65850	10,000
Benzotrichloride	98077	0.0003
Benzyl chloride	100447	200	0.02
Beryllium & compoundsa	0.02	0.0004
Biphenyl	92524	200
Bis (chloromethyl) ether	542881	1	0.00002
Bis (2-ethylhexyl) phthalate (DEHP)	117817	70	0.4
Boron and borates	10
Bromates (including Potassium bromate)	10	0.007
Bromine & compoundsj (except Hydrogen bromide & Bromates)	2
Bromodichloromethane	75274	100	70	0.03
Bromoform	75252	2,000	70	0.9
1,3-Butadiene	106990	0.03
Butyl benzyl phthalate	85687	700
Cadmium & compoundsa	0.1	0.0006
Calcium cyanamide	156627	1
Captan	133062	500	1
Carbaryl	63252	300
Carbon disulfide	75150	6,000	700
Carbon tetrachloride	56235	2,000	200	0.07
Carbonyl sulfide	463581	200	30
Catechol	120809	6,000	5
Chloramben	133904	50
Chlordane	57749	0.7	0.001
Chlorinated paraffins (avg length C12- C13, 60% chlorine)	10817126 2	0.04
Chlorine	7782505	200	6	0.1
Chlorine dioxide	10049044	3	0.2
Chloroacetic acid	79118	30	7
2-Chloroacetophenone	532274	0.03
4-Chloroaniline	106478	10	1
Chlorobenzene	108907	1,000
Chlorobenzilate	510156	70	0.7
1-Chloro-1,1-difluoroethane (CFC 142B)	75683	50,000
Chlorodifluoromethane (HCFC-22)	75456	50,000
Chloroform	67663	100i	0.2
Chloromethyl methyl ether	107302	0.001
2-Chlorophenol	95578	20
4-Chloro-o-phenylenediamine	95830	0.2
Chloropicrin	76062	30	0.4
Chloroprene	126998	1
p-Chloro-o-toluidine	95692	0.01
Chromium III & compoundsa (insoluble salts)	5,000
Chromium VI & compoundsa- mists and aerosols	0.008	0.00008
Chromium VI & compoundsa - solid particulate	1	0.00008
Cobalt & compoundsa	0.001
Coke oven emissions	8007452	0.002
Copper & compoundsa (except Copper cyanide)	100	2
p-Cresidine	120718	0.02
Cresols/Cresylic acid, isomers and mixtures (Methylphenols)	1319773	600
Cumene	98828	400
Cupferron	135206	0.02
Cyanide & compounds (inorganic)j, except Hydrogen cyanide	300	9
Cyclohexane	110827	6,000
2,4-Diaminoanisole	615054	0.2
2,4-Diaminotoluene	95807	0.0009
Diazomethane	334883	0.8
Dibromochloromethane	124481	300	70
1,2-Dibromo-3-chloropropane	96128	0.2	0.0005
Dibutylphthalate	84742	2,000	300
1,2-Dichlorobenzene	95501	2000	300
1,4-Dichlorobenzene (p-Dichlorobenzene)	106467	12,000	800	0.09
3,3'-Dichlorobenzidene	91941	0.003
Dichloro diphenyl dichloroethylene (DDE)	3547044	0.01
cis- 1,2-Dichloroethene	156592	3,000	1,000
trans- 1,2-Dichloroethene	156605	800	70
Dichloroethyl ether (Bis (chloroethyl) ether)	111444	100	0.003
2,4-Dichlorophenoxyacetic acid	94757	30
1,3-Dichloropropene	542756	20	0.2
Dichlorvos	62737	20	3	0.01
Dieldrin	60571	0. 2	0.0002
Diethanolamine	111422	3
Diethyl sulfate	64675	0.003
1,1-Difluoroethane (HCFC 152a)	75376	40,000
3,3'-Dimethoxybenzidine	119904	0.0008
p-Dimethyl aminoazobenzene	60177	0.0008
n,n-Dimethyl aniline	121697	7
3,3'-Dimethyl benzidine	119937	0.0002
Dimethyl carbamoyl chloride	79447	0.0003
Dimethyl formamide	68122	30
1,1-Dimethyl hyrazine	57147	0.5	0.001
1,2-Dimethyl hyrazine	540738	3	0.000006
2,4-Dimethylphenol	105679	70
Dimethyl phthalate	131113	10
Dimethyl sulfate	77781	0.0002
4,6-Dinitro-o-cresol	534521	10
2,4-Dinitrophenol	51285	30	7
2,4-Dinitrotoluene	121142	200	7	0.01
1,4-Dioxane (1,4-Diethyleneoxide)	123911	3,000	0.1
Epichlorohydrin	106898	1,000	0.8
1,2-Epoxybutane	106887	2
Ethyl acrylate	140885	0.5
Ethyl benzene	100414	40,000	3,000	1,000
Ethyl carbamate (Urethane)	51796	0.003
Ethyl chloride (Chloroethane)	75003	40,000	10,000
Ethylene dibromide (Dibromoethane)	106934	9	0.02
Ethylene dichloride (1,2-Dichloroethane)	107062	0.04
Ethylene glycol	107211	2,000	400
Ethylene glycol monobutyl ether	111762	10,000	1,000
Ethylene glycol monoethyl ether	110805	400	200	70
Ethylene glycol monoethyl ether acetate	111159	100
Ethylene glycol monomethyl ether	109864	90	20
Ethylene glycol monomethyl ether acetate	110496	90
Ethylene imine (Aziridine)	151564	0.00005
Ethylene oxide	75218	200	0.01
Ethylene thiourea	96457	0.08
Ethylidene dichloride (1,1-Dichloroethane)	75343	0.6
Fluorides & compoundsj, including Hydrogen fluoride	20	3
Formaldehyde	50000	50	40	0.08
Glutaraldehyde	111308	0.08
Heptachlor	76448	2	0.4	0.00008
Hexachlorobenzene	118741	30	0.4	0.0002
Hexachlorobutadiene	87683	0. 7
Hexachlorocyclohexanes, technical grade & mixed isomers	608731	0.002
alpha-Hexachlorocyclohexane	319846	0.0006
beta-Hexachlorocyclohexane	319857	200	2	0.002
gamma-Hexachlorocyclohexance (Lindane)	58899	10	0.04	0.003
Hexachlorocyclopentadiene	77474	100	0.2
Hexachloroethane	67721	60,000	0.3
Hexamethylene-1,6-diisocyanate	822060	0.2	0.03
Hexamethylphosphoramide	680319	0.00005
Hexane	110543	700
Hydrazine	302012	5	0.0002
Hydrochloric acid (Hydrogen chloride)	7647010	2,000	9
Hydrogen bromide	10035106	20
Hydrogen cyanide	74908	300	3
Hydrogen sulfide	7783064	40	30	10
Hydroquinone	123319	1,000	5
Isophorone	78591	700
Isopropanol	67630	3,000
Lead & compoundsa, inorganic	0.008
Lead - tetraethyl lead	78002	0. 0003
Maleic anhydride	108316	10	0.7
Manganese & compoundsa	0.05	0.04
Mercury & compounds. a - elemental & inorganic	2	0.3	0.009
Mercury - methylmercury	22967926	0. 3	0. 003
Methanol	67561	30,000	4,000
Methoxychlor	72435	20
Methyl bromide (Bromomethane)	74839	200	5
Methyl chloride (Chloromethane)	74873	1,000	400	90
Methyl chloroform (1,1,1-Trichloroethane)	71556	9,000	6,000	5,000
4,4-Methylene bis (2-chloroaniline)	101144	0.002
Methylene chloride (Dichloromethane)	75092	2,000	1,000	2
4,4-Methylenedianiline	101779	700	300	0.002
Methylene diphenyl diisocyanate	101688	0.6
Methyl ethyl ketone (2-Butanone)	78933	10,000	5,000
Methyl hydrazine	60344	0.0004
Methyl iodide (Iodomethane)	74884	30
Methyl isobutyl ketone (Hexanone)	108101	3,000
Methyl isocyanate	624839	1
Methyl methacrylate	80626	700
Methyl tert butyl ether(MTBE)	1634044	7,000	3,000
Michler's ketone (4,4'-Bis (dimethylamino) benzophenone)	90948	0.004
Fine mineral fibersc	20
Molybdenum & compoundsa	20
Naphthalene	91203	3	0.03
Nickel and compoundsa, except Nickel subsulfide	6	0.2	0.004
Nickel subsulfide	12035722	6	0.2	0.002
Nitric acid	7697372	90
Nitrobenzene	98953	2
4-Nitrobiphenyl	92933	0.00002
4-Nitrophenol	100027	0.1
2-Nitropropane	79469	20	0.1
N-Nitrosodi-n-butylamine	924163	0.0006
N-Nitrosodiethylamine	55185	0.00002
N-Nitrosodimethylamine	62759	0.00007
N-Nitrosodiphenylamine	86306	0.4
N-Nitrosdi-n-propylamine	621647	300	0.0005
N-Nitroso-n-methylethylamine	10595956	0.0002
N-Nitroso-n-methylurea	684935	0.00003
N-Nitrosomorpholine	59892	0.0005
N-Nitrosopiperidine	100754	0.0004
N-Nitrosopyrrolidine	930552	0.002
Parathion	56382	20	0.1
Pentachloronitrobenzene (Quintozene)	82688	10
Pentachlorophenol	87865	20	4	0.2
Phenol	108952	80	200
p-Phenylenediamine	106503	0.2
Phosgene	75445	4	0.3
Phosphine	7803512	0.3
Phosphoric acid	7664382	7
Phosphorus, white	7723140	20	0. 07
Phthalic anhydride	85449	7,000	20
Polychlorinated biphenyls (PCBs), except Aroclor 1254	1336363	0. 2	0.001
PCBs- Aroclor 1254	11097691	0.07
Polychlorinated dibenzo dioxins (PCDDs), Polychlorinated dibenzo furans (PCDFs) and dioxin-like Polychlorinated biphenyls (PCBs)	3 x 10-9d
Polycyclic Organic Matter	0.00009e
1,3-Propane sultone	1120714	0.001
beta-Propiolactone	57578	0.0002
Propionaldehyde	123386	8
Propoxur (Baygon)	114261	10	0. 1
n-Propyl bromide (1-Bromopropane)	106945	5,000	1,000
Propylene	115071	3,000
Propylene dichloride (1,2-Dichloropropane)	78875	200	4	0.1
Propylene glycol monomethyl ether (PGME)	107982	7,000
Propylene oxide	75569	3,000	0.3
1,2-Propylenimine (2-Methyl aziridine)	75558	0.0001
Quinoline	91225	0.001
Quinone	106514	1
Selenium & compoundsa, except Hydrogen selenide and Selenium sulfide	20
Selenium - Hydrogen selenide	7783075	5
Selenium sulfide	7446346	20	0.2
Sodium hydroxide	1310732	8	5
Styrene	100425	9,000	1,000	100
Styrene oxide	96093	0.02
Sulfatesf	100	20
Sulfuric acid and Oleumg	100	1
1,1,1,2-Tetrachloroethane	630206	100
1,1,2,2-Tetrachloroethane	79345	2,000
Perchloroethylene)	127184	1,000	0.2
Tetrachlorophenols	25167833	90
1,1,1,2-Tetrafluoroethane	811972	80,000
Thioacetamide	62555	0.0006
Titanium tetrachloride	7550450	10	0.1
Toluene	108883	4,000	300
2,4-Toluene diamine (2,4-Diaminotoluene)	95807	0.0009
2,4-and 2,6-Toluene diisocyanateh	26471625	0.07
o-Toluidine	95534	0.02
Toxaphene (Chlorinated camphene)	8001352	20	4	0.0003
1,2,4-Trichlorobenzene	120821	30
1,1,2-Trichloroethane	79005	10
Trichloroethylene	79016	10,000	500	0.5
Trichlorofluoromethane	75694	1,000
2,4,5-Trichlorophenol	95954	300
2,4,6-Trichlorophenol	88062	0.3
Triethylamine	121448	3,000	7
Trifluralin	1582098	30	3
2,2,4-Trimethylpentane	540841	3,000
Vanadium & compoundsa	0.2
Vinyl acetate	108054	200	20
Vinyl bromide	593602	3	0.005
Vinyl chloride	75014	1,000	100	0.2
Vinylidene chloride (1,1-Dichloroethylene)	75354	200	70
Xylenes, isomers and mixtures	1330207	9,000	3,000	100
Zinc & compoundsa	1,000	30
aFor metal compounds, concentrations apply to the metal portion of the compound.
bAsbestos units are fibers/cubic meter.
cFine mineral fibers are mineral fiber emissions from facilities manufacturing or processing glass, rock, or slag fibers or other mineral derived fibers of average diameter 1 micrometer (µm) or less.
dPCDD AAL is in terms of 2,3,7,8-tetrachlorodibenzodioxin equivalents, calculated as specified in the Rhode Island Air Toxics Guideline.
ePolycyclic Organic Matter AAL is in terms of benzo(a)pyrene equivalents, calculated as specified in the Rhode Island Air Toxics Guideline."
fSulfates AALs apply to ammonium bisulfate [(NH4)HSO4, CAS 7803-63-6], ammonium sulfate [(NH4)2SO4, CAS 7783-20-2], ferric sulfate [Fe(SO4)3, CAS 10028-22-5] and sodium sulfate [Na2SO4, CAS 7757-82-6]
gSulfuric acid and oleum AALs apply to sulfuric acid (H2SO4, CAS 7664-03-9), sulfur trioxide (SO3, CAS 7446-71-9) and oleum (H2SO4 + SO3, CAS 8014-95-7)
hIncludes 2,4-TDI (CAS 584849), 2,6-TDI (CAS 91087) and 2,4/2,6 mixtures (CAS 26471625)
iOne-hour AAL for chloroform should be compared to 7 to 8-hour average concentrations.
jFor bromine, cyanide and fluoride compounds, concentrations apply to the bromine, cyanide or fluoride portion of the compound

250 R.I. Code R. 250-RICR-120-05-22.9

Adopted effective 1/10/2019