SUMMARY of STANDARDS and GUIDELINES to support Ontario Regulation 419/05 - Air Pollution – Local Air Quality (including Schedule 6 of O. Reg. 419/05 on UPPER RISK THRESHOLDS) (Sorted by Chemical Abstracts Service Registry Number (CASRN)) STANDARDS DEVELOPMENT BRANCH ONTARIO MINISTRY of the ENVIRONMENT April 2012 PIBS # 6569e01 This document provides a list of air standards, guidelines and upper risk thresholds (URTs) that are used to assess the contribution of a contaminant to air quality from a single industrial or commercial facility in Ontario. This document is intended for use primarily by an emitter who is required to develop an Emission Summary and Dispersion Modelling (ESDM) report under Ontario’s Regulation 419/05 Air Pollution – Local Air Quality (“the Local Air Quality Regulation” or “the Regulation”) under the Environmental Protection Act. The ESDM report provides a predicted maximum point of impingement (POI) concentration of a contaminant in the vicinity of a facility and may be developed when obtaining an Environmental Compliance Approval (ECA) or in the context of various other requirements of the Local Air Quality Regulation. For more information on the preparation of ESDM reports, please refer to the most recent version of the document Procedure for Preparing an Emission Summary and Dispersion Modelling Report (PIBS# 3614e03). Standards and Guidelines Air standards and guidelines are based on human health or environmental effects or nuisance effects such as odour. Air standards are found in Schedules 2 and 3 of the Regulation. If there are multiple standards (i.e. standards with different averaging times) in Schedule 3 or multiple guidelines, when Section 20 applies, for a particular contaminant, all of them must be used for assessment purposes. This is because each represents a different type of effect linked to a particular averaging period (i.e., averaging time). It should be noted that Schedule 3 standards require the use of the newer air dispersion models to assess compliance. Please see below and refer to the Local Air Quality Regulation for additional information about phase-in timing and requirements. Ontario Ministry of the Environment (MOE) (“the Ministry”) recently introduced annual standards for some contaminants in Schedule 3. The Ministry also plans to introduce assessment values for modelling and monitoring exposure during an annual time period for the purpose of addressing short-term periods of elevated exposure. The assessment values will be used to guide decision making by the Ministry in addition to compliance assessment using the annual standard. Guidance materials on the implementation of annual standards and assessment values are under development. Phase-in of Air Standards The Local Air Quality Regulation identifies the phase-in dates for Schedules 2 and 3 standards, which are different depending on type of facility and its class identified by a North American Industrial Classification System (NAICS) code listed in Schedule 4 or 5 of the Regulation. 2 • In general, the standards listed in Schedule 2 of the Local Air Quality Regulation apply to all emitters until 2020. However, emitters in the following circumstances must comply with Schedule 3 standards: o As of February 1, 2010, facilities in sectors listed in Schedule 4. o As of February 1, 2013, facilities in sectors listed in Schedule 5. o As of February 1, 2020, all facilities. o Any facility that has been “sped up” under subsection 20(4) or (5). o New facilities in Schedule 4 or 5 sectors. o Any facility that has received a site-specific standard approval for a specific contaminant. Exceedence of an air standard identifies facilities that need to take action. This action would include notification of the MOE under section 28 of the Regulation and a follow up refinement of an ESDM report or abatement plan to be submitted within 30 days as needed. For an exceedence of an air standard, the facility may be able to abate emissions to come into compliance with that standard or alternatively pursue a site- specific standard or a sector-based technical standard. Facilities that have approval for a site-specific standard would assess compliance for that contaminant against their site- specific standard. Facilities that have registered under a Technical Standards Registry do not have to comply with concentration-based air standards for the contaminants if all of the sources of a contaminant at that facility are addressed in one or more technical standards and the facility is registered for all of these technical standards. Exceedence of a guideline also may cause adverse effects and as such also triggers the requirement to notify the MOE under section 28 of the Regulation and submit a refined ESDM report or an abatement plan accordingly. These notifications may also possibly trigger the issuance of a Director’s Notice under the Regulation. Applicants for ECAs under section 20.2 of the Environmental Protection Act are required to assess for and demonstrate compliance and conformance with the appropriate standards and guidelines for the contaminants that are the subject of the application. Air Standards versus Ambient Air Quality Criteria Most of the standards and guidelines identified in this document are developed using the MOE’s standard setting process and are based on Ambient Air Quality Criteria (AAQCs). AAQCs are effect-based concentration levels in air with variable averaging periods (e.g., 24 hour, 1 hour and 10 minutes) appropriate for the effect. Although the majority of standards and guidelines listed in the table are based on the same science as AAQCs, they are used differently. AAQCs are intended to assess general air quality from all sources – not just a single facility as are the POI limits. AAQCs are most commonly used in environmental assessments, general air quality assessments, and special studies using ambient air monitoring data. A separate list of AAQCs is available in Ontario Ambient Air Quality Criteria (PIBS# 6570e01). 3 Contaminants without Standards or Guidelines As set out in section 26 of the Regulation, an ESDM report must list all contaminants discharged from the property. If a contaminant is not listed in this document, there may still be concerns regarding its potential to cause adverse effects. For more information on how to consider contaminants with no MOE POI limits, emitters should refer to the Procedure for Preparing an Emission Summary and Dispersion Modelling Report (PIBS# 3614e03) and the Jurisdictional Screening Level (JSL) List. A Screening Tool for Ontario Regulation 419: Air Pollution – Local Air Quality (PIBS # 6547e), as amended from time to time. Upper Risk Thresholds An upper risk threshold (URT) is set above the air standard. It can be used to manage risks during the phase-in period of an air standard and is also used during the evaluation of requests for site-specific standards. Upper Risk Thresholds are NOT standards. URTs are concentrations, which if exceeded anywhere off property, require timely actions (i.e. immediate notification to the MOE in writing, and submission of an ESDM report for the contaminant that was exceeded within 3 months). For more information, please refer to section 30 of the Local Air Quality Regulation and to Chapter 3 of the Guideline for the Implementation of Air Standards in Ontario (GIASO) (PIBS # 5166e02). Organization of the Table The summary table is comprised of (i) a table listing standards and guidelines with the limiting effects identified in brackets beside the respective POI limit and upper risk thresholds and (ii) explanatory footnotes and definitions of terms and symbols. The table is divided into four main sections: • The far left-hand section of the table includes: i) A simple row counter (Row); ii) The Chemical Abstracts Service Registry Number (CASRN), sorted by numerical order; and iii) The contaminant name (Contaminant). (Note: Another list, containing the same information but sorted according to contaminant name, is also available on the MOE’s website). • The next section of the table contains Schedules 2 and 3 of the Regulation and lists the air standards along with the appropriate effective dates as specified in the Regulation, for new or updated standards. The fourth column also refers to footnotes that explain the phase-in of Schedules 2 and 3 of the Regulation: i) Schedule 2 – contains existing, updated and/or new half-hour air standards for some contaminants; and 4 ii) Schedule 3 – contains existing, updated and/or new air standards with various appropriate averaging periods. • The next section of the table contains the MOE guidelines for various averaging periods. • The far right-hand section of the table contains the URTs from Schedule 6 of the Local Air Quality Regulation. The first column applies to facilities subject to section 19 (Schedule 2) and the last column applies to facilities subject to section 20 (Schedule 3) as well as those who have notified under section 30 and are required to prepare an ESDM report. Disclaimer While this document summarizes certain requirements of the Local Air Quality Regulation, the regulation should be referred to for a full account of the regulatory requirements related to local air quality. Any conflict between this document and the Regulation will be resolved in favour of the Regulation. 5 O. Reg. 419 Standards(1) Guidelines (1) Schedule 6 Upper Risk Thre sholds (URT) (4) Phase In/Out Schedule 3 Standards CASRN Contaminant(2) wCitohSDnU tNtaapaetndmewdasai t naferoanddrnds t/ so r AwviSetS(crhµtah aHggen/iadnd mlufgal ³ eHrTd) oi2 mu re wiS(t2µth4ag VnH/d amoraui³rard)b le A(3tv)i meOreSa(t tghµPpaiegeennrr/rgd iimToo aTidd³rmi d;)m e (e 3as) (½W Hheo(Anuµp rgSp /Gel imcuetis³id)o)e nli n1e9 2(W4 hH(µeoAngup /rSp mGel ic³eut)siid )o( e3n)l i2n0e P(e(Wpµr2Oeig0hotr/h ediAomen pGdr ³S p) uT; eli (iidt3cemi,et ms3iel)aoie ) nn e ½( Hµgo/umr U³)R T (2µ4gU H/RmoTu ³r) 65 1 50-00-0 Formaldehyde - 65 (Health) - - - - - - (Odour/Irritation) 2 50-32-8 Benzo(a)pyrene - see note #7a Until July 1, 2016 - - - 0.0033 (Health)(7a) 0.0011 (Health)(7a) - 0.015 0.005 Benzo(a)pyrene [as a surrogate of 0.00001 (Health) 3 50-32-8 total Polycyclic Aromatic After July 1, 2016 0.00015 (Health) - - - - 0.015 0.005 Annual Hydrocarbons (PAHs)] - see note #19 4 52-86-8 Haloperidol - - - - 0.3 (Health) 0.1 (Health) - - - 5 55-18-5 Nitrosodiethylamine, N- - - - - CARC CARC - - - 6 55-63-0 Nitroglycerin - - - - 10 (Health) 3 (Health) - - - 7 56-23-5 Carbon tetrachloride - 7.2 (Health) 2.4 (Health) - - - - 72 24 8 56-35-9 Tributyltin oxide - - - - 0.42 (Health) 0.14 (Health) - - - 9 57-55-6 Propylene glycol - - - - 100 (Particulate) 120 (Particulate) - - - 10 57-74-9 Chlordane - - - - 15 (Health) 5 (Health) - - - 11 58-89-9 Lindane (Hexachlorocyclohexane) - - - - 15 (Health) 5 (Health) - - - 12 60-00-4 Ethylenediaminetetra acetic acid - - - - 100 (Particulate) 120 (Particulate) - - - 13 60-29-7 Ethyl ether - 700 (Odour) 8,000 (Health) - - - 950 (Odour); 7,000 80,000 10 minute 14 62-56-6 Thiourea - - - - 60 (Health) 20 (Health) - - - 15 62-75-9 Nitrosodimethylamine, N- - - - - CARC CARC - - - TBU - 19,000 16 64-17-5 Ethanol (Ethyl alcohol) - - - - 19,000 (Odour) - (Odour); 1 hour (5) - - 17 64-18-6 Formic acid - 1,500 (Health) 500 (Health) - - - - - - TBU - 2,500 (Odour) 18 64-19-7 Acetic acid - 2,500 (Odour) - - - (5) - - - 19 65-85-0 Benzoic acid - - - - 2,100 (Health) 700 (Health) - - - 20 67-56-1 Methanol (Methyl alcohol) - 12,000 (Health) 4,000 (Health) - - - - - - 21 67-63-0 Isopropanol (Isopropyl alcohol) - 22,000 (Health) 7,300 (Health) - - - - 220,000 73,000 22 67-64-1 Acetone - 35,640 (Health) 11,880 (Health) - - - - 118,800 118,800 6 O. Reg. 419 Standards(1) Guidelines (1) Schedule 6 Upper Risk Thre sholds (URT) (4) Phase In/Out Schedule 3 Standards CASRN Contaminant(2) wCitohSDnU tNtaapaetndmewdasai t naferoanddrnds t/ so r AwviSetS(crhµtah aHggen/iadnd mlufgal ³ eHrTd) oi2 mu re wiS(t2µth4ag VnH/d amoraui³rard)b le A(3tv)i meOreSa(t tghµPpaiegeennrr/rgd iimToo aTidd³rmi d;)m e (e 3as) (½W Hheo(Anuµp rgSp /Gel imcuetis³id)o)e nli n1e9 2(W4 hH(µeoAngup /rSp mGel ic³eut)siid )o( e3n)l i2n0e P(e(Wpµr2Oeig0hotr/h ediAomen pGdr ³S p) uT; eli (iidt3cemi,et ms3iel)aoie ) nn e ½( Hµgo/umr U³)R T (2µ4gU H/RmoTu ³r) 23 67-66-3 Chloroform - 3 (Health) 1 (Health) - - - - 300 100 24 67-68-5 Dimethyl sulfoxide - - - - 6,300 (Health) 2,100 (Health) - - - 25 71-23-8 Propanol, n- (Propyl alcohol) - - - - 48,000 (Health) 16,000 (Health) - - - 26 71-36-3 Butanol, n- Until Feb. 1, 2013 - - - 2,278 (Odour) - - 18,000 6,000 2,100 (Odour); 27 71-36-3 Butanol, n- After Feb. 1, 2013 2,760 (Health) 920 (Health) - 1,540 (Odour) - 18,000 6,000 10 minute Benzene 28 71-43-2 Until July 1, 2016 See note #7 See note #7 - - - - 300 100 see note #19 Benzene 0.45 (Health) 29 71-43-2 After July 1, 2016 7 (Health) - - - - 300 100 see note #19 Annual Methyl chloroform (1,1,1- 115,000 30 71-55-6 - 350,000 (Health) - - - - - - Trichloroethane) (Health) 31 72-43-5 Methoxychlor - - - - 100 (Particulate) 120 (Particulate) - - - 32 74-83-9 Methyl bromide - - - - 4,000 (Health) 1,350 (Health) - - - 33 74-85-1 Ethylene - - - - See note #6 40 (Vegetation) - - - TBU - 56,000 (Odour) 34 74-86-2 Acetylene - 56,000 (Odour) - - - (5) - - - 35 74-87-3 Methyl chloride Until Feb. 1, 2013 - - - See note #7b - - 9,600 3,200 36 74-87-3 Methyl chloride After Feb. 1, 2013 960 (Health) 320 (Health) - - - - 9,600 3,200 37 74-89-5 Monomethyl amine - 25 (Odour) - - - TBU - 25 (Odour) (5) - - - 38 74-90-8 Hydrogen cyanide - 24 (Health) 8 (Health) - - - - 240 80 39 75-00-3 Chloroethane Until Feb. 1, 2013 See note #7 see note #7 - - - - 75,000 25,000 40 75-00-3 Chloroethane After Feb. 1, 2013 16,800 (Health) 5,600 (Health) - - - - 75,000 25,000 41 75-01-4 Vinyl chloride - 3 (Health) 1 (Health) - - - - 300 100 42 75-05-8 Acetonitrile - 210 (Health) 70 (Health) - - - - 2,100 700 500 (Health); 43 75-07-0 Acetaldehyde - 500 (Health) 500 (Health) - - - 5,000 5,000 ½ hour 44 75-09-2 Methylene chloride - 660 (Health) 220 (Health) - - - - 22,000 22,000 7 O. Reg. 419 Standards(1) Guidelines (1) Schedule 6 Upper Risk Thre sholds (URT) (4) Phase In/Out Schedule 3 Standards CASRN Contaminant(2) wCitohSDnU tNtaapaetndmewdasai t naferoanddrnds t/ so r AwviSetS(crhµtah aHggen/iadnd mlufgal ³ eHrTd) oi2 mu re wiS(t2µth4ag VnH/d amoraui³rard)b le A(3tv)i meOreSa(t tghµPpaiegeennrr/rgd iimToo aTidd³rmi d;)m e (e 3as) (½W Hheo(Anuµp rgSp /Gel imcuetis³id)o)e nli n1e9 2(W4 hH(µeoAngup /rSp mGel ic³eut)siid )o( e3n)l i2n0e P(e(Wpµr2Oeig0hotr/h ediAomen pGdr ³S p) uT; eli (iidt3cemi,et ms3iel)aoie ) nn e ½( Hµgo/umr U³)R T (2µ4gU H/RmoTu ³r) 45 75-11-6 Methylene iodide - - - - 195 (Health) 65 (Health) - - - 46 75-15-0 Carbon disulphide - 330 (Odour) - - - TBU - 330 (Odour) (5) - - - 47 75-18-3 Dimethyl sulphide - see note #13 Until Feb. 1, 2013 30 (Odour) - - - - - - - 30 (Odour); 48 75-18-3 Dimethyl sulphide - see note #13 After Feb. 1, 2013 - - - - - - - 10 minute 49 75-20-7 Calcium carbide - - - - 20 (Corrosion) 10 (Corrosion) - - - 50 75-21-8 Ethylene oxide Until Feb. 1, 2013 - - - 15 (Health) - - 60 20 51 75-21-8 Ethylene oxide After Feb. 1, 2013 0.6 (Health) 0.2 (Health) - - - - 60 20 52 75-25-2 Bromoform - - - - 165 (Health) 55 (Health) - - - 53 75-34-3 Dichloroethane, 1,1- Until Feb. 1, 2013 - - - 600 (Health) - - 4,950 1,650 54 75-34-3 Dichloroethane, 1,1- After Feb. 1, 2013 495 (Health) 165 (Health) - - - - 4,950 1,650 Vinylidene chloride (1,1- 55 75-35-4 - 30 (Health) 10 (Health) - - - - - - Dichloroethene) 56 75-44-5 Phosgene - 130 (Health) 45 (Health) - - - - - - Chlorodifluoromethane (Freon 22) - 1,050,000 350,000 57 75-45-6 see note #10 - - - - (Health)(10) (Health)(10) - - - TBU - 0.5 58 75-50-3 Trimethyl amine - - - - 0.5 (Odour) - (Odour); - - 1 hour (5) 59 75-56-9 Propylene oxide - 4.5 (Health) 1.5 (Health) - - - - 450 150 60 75-65-0 Butanol, tertiary - - - - See note #6 30,300 (Health) - - - 61 75-69-4 Trichlorofluoromethane - see note - - - - 18,000 (Health)(10) 6,000 (Health)(10) - - - #10 62 75-71-8 Dseifelu noortoed i#ch1l0o romethane (Freon 12) - - - - - (1H,e5a0l0th,0)0(100) 500,000 (Health)(10) - - - 63 76-05-1 Trifluoroacetic acid - - - - 45 (Health) 15 (Health) - - - Trifluorotrichloroethane - see note 2,400,000 800,000 64 76-13-1 #10 - (Health)(10) (Health)(10) - - - - - - 65 76-14-2 D1,i2ch- l(oFrroe-o1n,1 1,21,42)- t-e streaef lnuootreo e#th1a0n e, - - - - (2H,e1a0l0th,0)0(100) 700,000 (Health)(10) - - - 66 77-47-4 Hexachlorocyclopentadiene - - - - 6 (Health) 2 (Health) - - - 8 O. Reg. 419 Standards(1) Guidelines (1) Schedule 6 Upper Risk Thre sholds (URT) (4) Phase In/Out Schedule 3 Standards CASRN Contaminant(2) wCitohSDnU tNtaapaetndmewdasai t naferoanddrnds t/ so r AwviSetS(crhµtah aHggen/iadnd mlufgal ³ eHrTd) oi2 mu re wiS(t2µth4ag VnH/d amoraui³rard)b le A(3tv)i meOreSa(t tghµPpaiegeennrr/rgd iimToo aTidd³rmi d;)m e (e 3as) (½W Hheo(Anuµp rgSp /Gel imcuetis³id)o)e nli n1e9 2(W4 hH(µeoAngup /rSp mGel ic³eut)siid )o( e3n)l i2n0e P(e(Wpµr2Oeig0hotr/h ediAomen pGdr ³S p) uT; eli (iidt3cemi,et ms3iel)aoie ) nn e ½( Hµgo/umr U³)R T (2µ4gU H/RmoTu ³r) 67 77-58-7 Dibutyltin dilaurate - - - - 100 (Health) 30 (Health) - - - 300 (Health); 68 77-92-9 Citric acid - - - - 100 (Particulate) 120 (Particulate) - - 1 hour 69 77-99-6 Trimethylol propane - - - - 100 (Health) - - - - 70 78-83-1 Isobutanol Until Feb. 1, 2013 - - - 1,940 (Odour) - - 48,000 16,000 2,340 (Odour); 71 78-83-1 Isobutanol After Feb. 1, 2013 13,800 (Health) 4,600 (Health) - 1,720 (Odour) - 48,000 16,000 10 minute TBU - 2,400 (Odour) 72 78-87-5 Propylene dichloride - 2,400 (Odour) - - - (5) - - - 73 78-93-3 Methyl ethyl ketone (2-Butanone) - 3,000 (Health) 1,000 (Health) - - - - 30,000 10,000 74 79-01-6 Trichloroethylene (TCE) - 36 (Health) 12 (Health) - - - - 3,600 1,200 75 79-06-1 Acrylamide - 45 (Health) 15 (Health) - - - - - - TBU - 100 76 79-09-4 Propionic acid - - - - 100 (Odour) - (Odour); - - 1 hour (5) TBU - 2,000 (Odour) 77 79-41-4 Methacrylic acid - - - - 2,000 (Odour) (5) - - - 78 80-62-6 Methyl methacrylate - 860 (Odour) - - - TBU - 860 (Odour) (5) - - - 79 81-81-2 Warfarin - - - - 30 (Health) 10 (Health) - - - 80 84-51-5 Ethylanthraquinone, 2- - - - - 30 (Health) 10 (Health) - - - 81 84-66-2 Diethyl phthalate (DEP) - - - - 100 (Health) 125 (Health) - - - Dibutyl phthalate (DBP, di-n-butyl 82 84-74-2 - - - - 100 (Health) 50 (Health) - - - phthalate) 83 84-75-3 Dihexyl phthalate (DHP) - - - - 100 (Health) 50 (Health) - - - 84 85-00-7 Diquat dibromide - respirable - - - - 0.096 (Health) 0.032 (Health) - - - 85 85-00-7 Diquat dibromide - total - - - - 0.48 (Health) 0.16 (Health) - - - 86 85-44-9 Phthalic anhydride - 100 (Particulate) 120 (Particulate) - - - - - - 87 85-68-7 Butyl benzene phthalate - - - - 450 (Health) 150 (Health) - - - 88 87-86-5 Pentachlorophenol - - - - 60 (Health) 20 (Health) - - - 9 O. Reg. 419 Standards(1) Guidelines (1) Schedule 6 Upper Risk Thre sholds (URT) (4) Phase In/Out Schedule 3 Standards CASRN Contaminant(2) wCitohSDnU tNtaapaetndmewdasai t naferoanddrnds t/ so r AwviSetS(crhµtah aHggen/iadnd mlufgal ³ eHrTd) oi2 mu re wiS(t2µth4ag VnH/d amoraui³rard)b le A(3tv)i meOreSa(t tghµPpaiegeennrr/rgd iimToo aTidd³rmi d;)m e (e 3as) (½W Hheo(Anuµp rgSp /Gel imcuetis³id)o)e nli n1e9 2(W4 hH(µeoAngup /rSp mGel ic³eut)siid )o( e3n)l i2n0e P(e(Wpµr2Oeig0hotr/h ediAomen pGdr ³S p) uT; eli (iidt3cemi,et ms3iel)aoie ) nn e ½( Hµgo/umr U³)R T (2µ4gU H/RmoTu ³r) 89 90-15-3 Naphthol, alpha- - - - - 100 (Health) 100 (Health) - - - 50 (Odour); 90 91-20-3 Naphthalene - - - - 36 (Odour) 22.5 (Health) - - 10 minute 91 91-94-1 Dichlorobenzidine, 3,3- - - - - CARC CARC - - - TBU - 60 (Odour); 92 92-52-4 Biphenyl - - - - 60 (Odour) - 1 hour(5) - - 93 95-16-9 Benzothiazole - - - - 200 (Health) 70 (Health) - - - 30,500 (Health); 94 95-50-1 Dichlorobenzene, 1,2- - - - - 37,000 (Health) - - - 1 hour Trimethylbenzene, 1,2,4- (individual 95 95-63-6 Until Feb. 1, 2013 - - - 660 (Health) - - 6,600 2,200 isomer or Trimethylbenzene mixture) Trimethylbenzene, 1,2,4- (individual 96 95-63-6 After Feb. 1, 2013 660 (Health) 220 (Health) - - - - 6,600 2,200 isomer or Trimethylbenzene mixture) TBU - 4 97 96-33-3 Methyl acrylate - 4 (Odour) - - - - (Odour); - - 1 hour (5) 98 98-00-0 Furfuryl alcohol - 3,000 (Health) 1,000 (Health) - - - - - - TBU - 1,000 99 98-01-1 Furfural - 1,000 (Odour) - - - - (Odour); - - 1 hour (5) 100 98-82-8 Isopropyl benzene - 100 (Odour) 400 (Health) - - - - - - 24,000 (Health); 101 98-83-9 Methyl styrene, alpha - - - - See note #6 - - - 1 hour 1,167 (Health); 625 1 hour 102 98-86-2 Acetophenone - - - - - - - (Odour) 850 (Odour); 10 minute 125 (Corrosion & 103 98-88-4 Benzoyl chloride - - - - 350 (Health) - - - Health) 104 100-41-4 Ethyl benzene - 1,400 (Odour) 1,000 (Health) - - - 1,900 (Odour); 14,000 10,000 10 minute 105 100-42-5 Styrene - 400 (Odour) 400 (Health) - - - - - - 106 100-51-6 Benzyl alcohol - - - - 2,640 (Health) 880 (Health) - - - 107 101-14-4 Methylene-bis-2-chloroaniline, 4,4- - - - - 30 (Health) 10 (Health) - - - Methane diphenyl diisocyanate (MDI 108 101-68-8 - 2 (Health) 0.7(Health) - - - - 7 7 Monomer) 10