SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT

(Adopted June 1, 1990)(Amended December 7, 1990)
(Amended July 10, 1998)(Amended January 8, 1999)(Amended March 12, 1999)

RULE 1401. NEW SOURCE REVIEW OF TOXIC AIR CONTAMINANTS

(a) Purpose
This rule specifies limits for maximum individual cancer risk (MICR), cancer burden, and noncancer acute and chronic hazard index (HI) from new permit units, relocations, or modifications to existing permit units which emit toxic air contaminants listed in Table I. The rule establishes allowable risks for permit units requiring new permits pursuant to Rules 201 or 203.

(b) Applicability

    (1) Applications for new, relocated, and modified permit units which were received by the District on or after June 1, 1990 shall be subject to Rule 1401. Applications shall be subject to the version of Rule 1401 that is in effect at the time the application is deemed complete. Permit units installed without a required permit to construct shall be subject to this rule, if the application for a permit to operate such equipment was submitted after June 1, 1990.

    (2) This rule shall apply to new, relocated, and modified permit equipment identified in Rule 219 as not requiring a written permit if the emissions from the equipment will be greater than the screening emissions levels contained within the procedures for determining health risks published pursuant to paragraph (e)(1).

(c)Definitions

    (1) ACCEPTABLE STACK HEIGHT for a permit unit is defined as a stack height that does not exceed two and one half times the height of the permit unit or two and one half times the height of the building housing the permit unit, and shall not be greater than 65 meters (213 feet), unless the applicant demonstrates to the satisfaction of the Executive Officer that a greater height is necessary.

    (2) BEST AVAILABLE CONTROL TECHNOLOGY FOR TOXICS (T-BACT) means the most stringent emissions limitation or control technique which:

    (3) CANCER BURDEN means the estimated increase in the occurrence of cancer cases in a population subject to a MICR of greater than or equal to one in one million (1.0 x 10-6) resulting from exposure to toxic air contaminants.

    (4) CONTEMPORANEOUS RISK REDUCTION means any reduction in risk resulting from a decrease in emissions of toxic air contaminants at the facility that is permanent, real, quantifiable and enforceable through District permit conditions. Permit applications associated with the increase and decrease in risk must be submitted together and the reduction of risk must occur before the start of operation of the permit unit that will have an increased risk. A contemporaneous risk reduction shall be calculated based on the actual average annual emissions, as determined by facility records, and annual emissions declarations pursuant to Rule 301 as appropriate, or other data approved by the Executive Officer, whichever is less, which have occurred during the two-year period immediately preceding the date of application

    (5) FACILITY means any permit unit or grouping of permit units or other air contaminant-emitting activities which are located on one or more contiguous properties within the District, in actual physical contact or separated solely by a public roadway or other public right-of-way, and are owned or operated by the same person (or by persons under common control), or an outer continental shelf (OCS) source as determined in 40 CFR Section 55.2. Such above-described groupings, if noncontiguous, but connected only by land carrying a pipeline, shall not be considered one facility. Notwithstanding the above, sources or installations involved in crude oil and gas production in Southern California Coastal or OCS Waters and transport of such crude oil and gas in Southern California Coastal or OCS Waters shall be included in the same facility which is under the same ownership or use entitlement as the crude oil and gas production facility on-shore.

    (6) INDIVIDUAL SUBSTANCE ACUTE HAZARD INDEX (HI) is the ratio of the estimated maximum one-hour concentration of a toxic air contaminant for a potential maximally exposed individual to its acute reference exposure level.

    (7) INDIVIDUAL SUBSTANCE CHRONIC HAZARD INDEX (HI) is the ratio of the estimated long-term level of exposure to a toxic air contaminant for a potential maximally exposed individual to its chronic reference exposure level. The chronic hazard index calculations shall include multipathway consideration, if applicable.

    (8) MAXIMUM INDIVIDUAL CANCER RISK (MICR) is the estimated probability of a potential maximally exposed individual contracting cancer as a result of exposure to toxic air contaminants over a period of 70 years for residential and 46 years for worker receptor locations. The MICR calculations shall include multipathway consideration, if applicable.

    (9) MODIFICATION means any physical change in, change in method of operation, or addition to an existing permit unit that requires an application for a permit to construct and/or operate. Routine maintenance and/or repair shall not be considered a physical change. A change in the method of operation of equipment, unless previously limited by an enforceable permit condition, shall not include:

    For facilities that have been issued a facility permit pursuant to Regulation XX or a Title V permit pursuant to Regulation XXX, modification means any physical change in, change in method of operation of, or addition to an existing individual article, machine, equipment or other contrivance which would have required an application for a permit to construct and/or operate, were the unit not covered under a facility permit or Title V permit.

    (10) PERMIT UNIT means any article, machine, equipment, or other contrivance, or combination thereof, which may cause or control the issuance of air contaminants, and which requires a written permit pursuant to Rules 201 and/or 203. For facilities that have been issued a facility permit or Title V permit, a permit unit for the purpose of this rule means any individual article, machine, equipment or other contrivance which may cause or control the issuance of air contaminants and which would require a written permit pursuant to Rules 201 and/or 203 if it was not covered under a facility permit or Title V permit. For publicly-owned sewage treatment operations, each process within multi-process permit units at the facility shall be considered a separate permit unit for purposes of this rule.

    (11) RECEPTOR LOCATION means

    The Executive Officer shall consider the potential for exposure in determining whether the location will be considered a receptor location.

    (12) RELOCATION means the removal of an existing permit unit from one parcel of land in the District and installation at another parcel of land where two parcels are not in actual physical contact and are not separated solely by a public roadway or other public right-of-way. The removal of a permit unit from one location within a facility and installation at another location within the facility is a relocation only if an increase in maximum individual cancer risk in excess of one in one million (1 x 10-6) or a Hazard Index of 1.0 occurs at any receptor location.

    (13) TOTAL ACUTE HAZARD INDEX (HI) is the sum of the individual substance acute HIs for all toxic air contaminants affecting the same target organ system.

    (14) TOTAL CHRONIC HAZARD INDEX (HI) is the sum of the individual substance chronic HIs for all toxic air contaminants affecting the same target organ system.

    (15) TOXIC AIR CONTAMINANT is an air pollutant which may cause or contribute to an increase in mortality or serious illness, or which may pose a present or potential hazard to human health. For the purpose of this rule, toxic air contaminants are those listed in Table I.

(d) Requirements
The requirements of paragraphs (d)(2) and (d)(3) shall become effective September 8, 1998. The Executive Officer shall deny the permit to construct a new, relocated or modified permit unit if emissions of any toxic air contaminant listed in Table I may occur, unless the applicant has substantiated to the satisfaction of the Executive Officer all of the following:

    (1) MICR and Cancer Burden
    The cumulative increase in MICR which is the sum of the calculated MICR values for all toxic air contaminants emitted from the new, relocated or modified permit unit and all other permit units located within a radius of 100 meters owned or operated by the applicant for which applications were submitted on or after June 1, 1990 will not result in any of the following:

    (2) Chronic Hazard Index
    The cumulative increase in total chronic HI, for all target organ systems, due to total emissions from the new, relocated or modified permit unit and all other permit units located within a radius of 100 meters owned or operated by the applicant for which applications were deemed complete on or after the date when the risk value for the compound is finalized by OEHHA, unless paragraph (e)(3) applies, will not exceed 1.0 at any receptor location.

    (3) Acute Hazard Index
    The cumulative increase in total acute HI, for all target organ systems, due to total emissions from the new, relocated or modified permit unit and all other permit units located within a radius of 100 meters owned or operated by the applicant for which applications were deemed complete on or after the date when the risk value for the compound is finalized by OEHHA, unless paragraph (e)(3) applies, will not exceed 1.0 at any receptor location.

    (4) Risk Per Year
    The risk per year shall not exceed 1/70 of the maximum allowable risk specified in (d)(1)(A) or (d)(1)(B) at any receptor locations in residential areas.

    (5) If a permit contains operating conditions imposed pursuant to Rule 1401, which prohibit or limit the use or emission of toxic air contaminants, those conditions shall apply only to those toxic air contaminants listed in the version of Rule 1401 applicable at the time the permit conditions were imposed.

    (6) Federal New Source Review for Toxics
    Pursuant to Section 112(g) of the federal Clean Air Act (CAA), no person shall begin construction or reconstruction of a major stationary source emitting hazardous air pollutants listed in Section 112 (b) of the CAA, unless the source is constructed with Best Available Control Technology for Toxics (T-BACT) and complies with all other applicable requirements, including definitions and public noticing, referenced in 40 CFR 63.40 through 63.44. The requirements of this paragraph shall not apply to:

(e) Risk Assessment Procedures

    (1) The Executive Officer shall periodically publish procedures for determining health risks under this rule. To the extent possible, the procedures will be consistent with the policies and procedures of the state Office of Environmental Health Hazard Assessment (OEHHA).

    (2) Within 150 days of risk values for compounds not in Table I being finalized by OEHHA, staff will bring proposed amendments to this rule to reflect changes to Table I.

    (3) Within 150 days of risk values for compounds in Table I being updated by OEHHA, staff will:

    (4) To calculate the cumulative increase in MICR pursuant to paragraph (d)(1), the increase from each permit unit shall be based on the emissions of toxic air contaminants, the risk values, and risk assessment procedures applicable at the time when each complete application was deemed complete by the District.

(f) Emissions Calculations

    (1) For the purpose of determining MICR and cancer burden due to a new or relocated permit unit pursuant to this rule, the total Toxic Air Contaminant emissions from the new or relocated permit unit shall be calculated on an annual basis from permit conditions which directly limit the emissions or, when no such conditions are imposed, from:

    (2) For the purpose of determining chronic HI due to a new or relocated permit unit pursuant to this rule, the total emissions from a permit unit shall be calculated on an annual average basis from permit conditions which directly limit the emissions or, when no such conditions are imposed, from:

    (3) For the purpose of determining MICR, cancer burden and chronic HI due to a modified permit unit pursuant to this rule, the increase in emissions from the modified permit unit shall be calculated based on the difference between the total permitted emissions after the modification, calculated pursuant to the criteria established in subparagraphs (f)(1)(A), (B), (C), and (D), and:

    (4) For the purpose of determining acute HI due to a new, relocated or modified permit unit pursuant to this rule, the total emissions from a permit unit shall be calculated on a maximum hourly basis from permit conditions which directly limit the emissions or, when no such conditions exist, from:

    (5) De Minimus Values
    Any permit unit with values at or below the screening levels as specified in the procedures for determining health risks under this rule, published pursuant to paragraph (e)(1), shall be deemed in compliance with the requirements of subdivision (d).

(g) Exemptions

    (1) The requirements of subdivision (d) shall not apply to:

    (2) Contemporaneous Risk Reduction

    (3) Alternate Hazard Index Levels
    The requirements of paragraphs (d)(2) and (d)(3) shall not apply if the applicant substantiates to the satisfaction of the Executive Officer that at all receptor locations and for every target organ system, the total chronic and acute HI level resulting from emissions from the new, modified or relocated permit unit and all other permit units located within 100 meters owned or operated by the applicant for which applications were submitted on or after July 10, 1998 shall not exceed alternate HI levels which are determined by the Executive Office in consultation with the Office of Environmental Health Hazard Assessment to be protective against adverse health effects. No alternate HI level shall exceed 10.

TABLE I

TOXIC AIR CONTAMINANTS

CAS #

SUBSTANCE

DATE OF LISTING

75-07-0

Acetaldehyde Dec 7, 1990**

60-35-5

Acetamide January 8, 1999

107-02-8

Acrolein *

79-06-1

acrylamide (or propenamide) Dec 7, 1990**

107-13-1

acrylonitrile (or vinyl cyanide) Dec 7, 1990**

117-79-3

aminoanthraquinone, 2- January 8, 1999

7664-41-7

Ammonia *

62-53-3

Aniline January 8, 1999

7440-38-2


7784-42-1

arsenic and arsenic compounds (inorganic,
including arsine)
including, but not limited to:
arsenic compounds (inorganic)
arsine
**

Sept 8, 1998
*

1332-21-4

Asbestos June 1, 1990

71-43-2

benzene (including benzene from gasoline) June 1, 1990**

92-87-5

benzidine (and its salts) Dec 7, 1990**

100-44-7

benzyl chloride Sept 8, 1998**

7440-41-7

beryllium and beryllium compounds Dec 7, 1990**

111-44-4

bis(2-chloroethyl)ether (DCEE) Dec 7, 1990

117-81-7

bis(2-ethylhexyl)phthalate (DEHP) Sept 8, 1998**

542-88-1

bis(chloromethyl)ether Dec 7, 1990

7789-30-2

bromine pentafluoride *

106-99-0

butadiene, 1,3- Dec 7, 1990

7440-43-9

cadmium and cadmium compounds June 1, 1990**

56-23-5

carbon tetrachloride (or tetrachloromethane) June 1, 1990**

7782-50-5

Chlorine *

95-83-0

chloro-o-phenylenediamine,4- January 8, 1999

95-69-2

chloro-o-toluidine, p- January 8, 1999

108-90-7

Chlorobenzene *


75-43-4
75-69-4
76-13-1

chlorofluorocarbons
dichlorodifluoromethane (CFC-12)
trichlorofluoromethane (CFC-11)
trichlorotrifluoroethane (CFC-113)

*
*
*

67-66-3

Chloroform Dec 7, 1990**


95-57-8
88-06-2

87-86-5

Chlorophenols
chlorophenol, 2-
trichlorophenol, 2,4,6-
tetrachlorophenols (TECPH)
pentachlorophenol

*
Dec 7, 1990
*
Sept 8, 1998**

76-06-2

Chloropicrin *

126-99-8

Chloroprene **

18540-29-9

7758-97-6

chromium (hexavalent) and chromium compounds
including, but not limited to:
lead chromate
June 1, 1990**

Sept 8, 1998**

7440-50-8

copper and copper compounds *

120-71-8

cresidine, p- January 8, 1999

1319-77-3
08-39-4
95-48-7
106-44-5

cresols/cresylic acid (all isomers and mixture)
cresol, m-
cresol, o-
cresol, p-
*
*
*
*

135-20-6

cupferron January 8, 1999


924-16-3
621-64-7
55-18-5
62-75-9
10595-95-6

dialkylnitrosamines
nitrosodi-n-butylamine, n-
nitrosodi-n-propylamine, n-
nitrosodiethylamine, n-
nitrosodimethylamine, n-
nitrosomethylethylamine, n-

Dec 7, 1990
Sept 8, 1998
Dec 7, 1990
Dec 7, 1990
Sept 8, 1998

615-05-4

diaminoanisole, 2,4- (sulfate) January 8, 1999

95-80-7

diaminotoluene, 2,4- January 8, 1999

1746-01-6

1746-01-6

40321-76-4

39227-28-6

57653-85-7

19408-74-3

35822-46-9

3268-87-9

41903-57-5

36088-22-9

37871-00-4

34465-46-8

dibenzo-p-dioxins (chlorinated)

tetrachlorodibenzo-p-dioxin, 2,3,7,8-

pentachlorodibenzo-p-dioxin, 1,2,3,7,8-

hexachlorodibenzo-p-dioxin, 1,2,3,4,7,8-

hexachlorodibenzo-p-dioxin, 1,2,3,6,7,8-

hexachlorodibenzo-p-dioxin, 1,2,3,7,8,9-

heptachlorodibenzo-p-dioxin, 1,2,3,4,6,7,8-

octachlorodibenzo-p-dioxin, 1,2,3,4,5,6,7,8-

total tetrachlorodibenzo-p-dioxin

total pentachlorodibenzo-p-dioxin

total hexachlorodibenzo-p-dioxin

total heptachlorodibenzo-p-dioxin

total dioxins, with individual isomers reported

total dioxins, without individual isomers reported

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

   

51207-31-9

51207-31-9

57117-41-6

57117-31-4

70648-26-9

57117-44-9

72918-21-9

60851-34-5

67562-39-4

55673-89-7

39001-02-0

55722-27-5

30402-15-4

55684-94-1

38998-75-3

dibenzofurans (chlorinated)

tetrachlorodibenzofuran, 2,3,7,8-

pentachlorodibenzofuran, 1,2,3,7,8-

pentachlorodibenzofuran, 2,3,4,7,8-

hexachlorodibenzofuran, 1,2,3,4,7,8-

hexachlorodibenzofuran, 1,2,3,6,7,8-

hexachlorodibenzofuran, 1,2,3,7,8,9-

hexachlorodibenzofuran, 2,3,4,6,7,8-

heptachlorodibenzofuran, 1,2,3,4,6,7,8-

heptachlorodibenzofuran, 1,2,3,4,7,8,9-

octachlorodibenzofuran, 1,2,3,4,5,6,7,8

total tetrachlorodibenzofuran

total pentachlorodibenzofuran

total hexachlorodibenzofuran

total heptachlorodibenzofuran

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

June 1, 1990**

96-12-8

dibromo-3-chloropropane, 1,2- (DBCP) Sept 8, 1998**

106-46-7

dichlorobenzene, 1,4- (or p-dichlorobenzene) Sept 8, 1998**

91-94-1

dichlorobenzidine, 3,3 (or diphenylhydrazine) Dec 7, 1990

75-34-3

dichloroethane, 1,1- January 8, 1999

60-11-7

dimethylaminoazobenzene, p- January 8, 1999

121-14-2

dinitrotoluene, 2,4- Dec 7, 1990

123-91-1

dioxane, 1,4- (or 1,4-diethylene oxide) Dec 7, 1990**

106-89-8

epichlorohydrin (or 1-chloro-2,3-epoxypropane) Dec 7, 1990**

140-88-5

ethyl acrylate *

75-00-3

ethyl chloride (or chloroethane) *

106-93-4

ethylene dibromide (or 1,2-dibromoethane) June 1, 1990**

107-06-2

ethylene dichloride (or 1,2-dichloroethane) June 1, 1990**

75-21-8

ethylene oxide (or 1,2-epoxyethane) June 1, 1990**

96-45-7

ethylene thiourea January 8, 1999

50-00-0

formaldehyde Dec 7, 1990**

 

gasoline vapors *

111-30-8

glutaraldehyde *

.

111-76-2

110-80-5

111-15-9

109-86-4

110-49-6

glycol ethers (and their acetates)

ethylene glycol butyl ether

ethylene glycol ethyl ether

ethylene glycol ethyl ether acetate

ethylene glycol methyl ether

ethylene glycol methyl ether acetate

.

*

Feb 10, 1999

*

*

*

118-74-1

hexachlorobenzene Dec 7, 1990**

608-73-1

58-89-9

hexachlorocyclohexanes (mixed or technical grade)

hexachlorocyclohexane, gamma- (lindane)
Dec 7, 1990**

Sept 8, 1998**

77-47-4

hexachlorocyclopentadiene *

302-01-2

hydrazine Sept 8, 1998**

122-66-7

hydrazobenzene (or 1,2-diphenylhydrazine) Dec 7, 1990

7647-01-0

hydrochloric acid (or hydrogen chloride) *

7664-39-3

hydrofluoric acid (or hydrogen fluoride) *

10035-10-6

hydrogen bromide (HBR) *

74-90-8

hydrogen cyanide *

7783-06-4

hydrogen sulfide February 10, 1999


624-83-9

isocyanates
methyl isocyanate

*

7439-92-1


301-04-2
7758-97-6
7446-27-7
1335-32-6

lead and lead compounds (inorganic, including elemental lead)including, but not limited to:
lead compounds (inorganic)
lead acetate
lead chromate
lead phosphate
lead subacetate
Sept 8, 1998**

Sept 8, 1998**
Sept 8, 1998**
Sept 8, 1998**
Sept 8, 1998**
Sept 8, 1998**

 

lead compounds (other than inorganic) Sept 8, 1998**

108-31-6

maleic anhydride *

7439-96-5

manganese and manganese compounds *

7439-97-6

7487-94-7
593-74-8

mercury and mercury compounds (inorganic)
including, but not limited to:
mercuric chloride
methyl mercury
*

*
*

67-56-1

methanol (methyl alcohol) *

74-83-9

methyl bromide (or bromomethane) *

71-55-6

methyl chloroform (or 1,1,1-trichloroethane) *

80-62-6

methyl methacrylate *

101-14-4

methylene bis(2-chloroaniline), 4,4- (MOCA) January 8, 1999

75-09-2

methylene chloride (or dichloromethane) June 1, 1990**

101-77-9

methylene dianiline, 4,4'- (and its dichloride) Sept 8, 1998**

1135

mineral fibers (other than man-made) *

90-94-8

michler's ketone January 8, 1999

7440-02-0

373-02-4
3333-39-3
1463-39-3
12054-48-7
1313-99-1
12035-72-2
1271-28-9

nickel and nickel compounds:
including, but not limited to:
nickel acetate
nickel carbonate
nickel carbonyl
nickel hydroxide
nickel oxide
nickel subsulfide
nickelocene
refinery dust from the pyrometallurgical process
Mar 12, 1999**

Mar 12, 1999**
Mar 12, 1999**
Mar 12, 1999**
Mar 12, 1999**
Dec 7, 1990
Mar 12, 1999**
Dec 7, 1990

98-95-3

nitrobenzene *

79-46-9

nitropropane, 2- *

759-73-9

nitroso-n-ethylurea, n- Dec 7, 1990

684-93-5

nitroso-n-methylurea, n- Dec 7, 1990

86-30-6

nitrosodiphenylamine, n- Dec 7, 1990

156-10-5

nitrosodiphenylamine, p- Sept 8, 1998

59-89-2

nitrosomorpholine, n- January 8, 1999

100-75-4

nitrosopiperidine, n- January 8, 1999

930-55-2

nitrosopyrrolidine, n- Dec 7, 1990

108171-26-2

paraffins, chlorinated (average chain length, c12; approx. 60% cl by weight) January 8, 1999

127-18-4

perchloroethylene (or tetrachloroethylene) Sept 8, 1998**

108-95-2

phenol *

75-44-5

phosgene *

7723-14-0

7803-51-2

phosphorus and phosphorus compounds

phosphine
*

*

85-44-9

phthalic anhydride *

1336-36-3

polychlorinated biphenyls (PCBs) Dec 7, 1990**


107-05-1
56-55-3
50-32-8
205-99-2
205-82-3
207-08-9
218-01-9
226-36-8
224-42-0
53-70-3
192-65-4
189-64-0
189-55-9
191-30-0
194-59-2
57-97-6
42397-64-8
42397-65-9
193-39-5
56-49-5
3697-24-3
91-20-3
602-87-9
7496-02-8
607-57-8
5522-43-0
57835-92-4

polycyclic aromatic hydrocarbons (PAHs)
allyl chloride
benz[a]anthracene
benzo[a]pyrene
benzo[b]fluoranthene
benzo[j]fluoranthene
benzo[k]fluoranthene
chrysene
dibenz[a,h]acridine
dibenz[a,j]acridine
dibenz[a,h]anthracene
dibenzo[a,e]pyrene
dibenzo[a,h]pyrene
dibenzo[a,i]pyrene
dibenzo[a,l]pyrene
dibenzo[c,g]carbazole, 7h-
dimethylbenz[a]anthracene, 7,12-
dinitropyrene, 1,6-
dinitropyrene, 1,8-
indeno[1,2,3-cd]pyrene
methylcholanthrene, 3-
methylchrysene, 5-
naphthalene
nitroacenaphthene, 5-
nitrochrysene, 6-
nitrofluorene, 2-
nitropyrene, 1-
nitropyrene, 4-
polycyclic aromatic hydrocarbons (PAHs), total

January 8, 1999
Dec 7, 1990
Dec 7, 1990
Dec 7, 1990
January 8, 1999
Dec 7, 1990
Dec 7, 1990
January 8, 1999
January 8, 1999
Dec 7, 1990
January 8, 1999
January 8, 1999
January 8, 1999
January 8, 1999
January 8, 1999
January 8, 1999
January 8, 1999
January 8, 1999
Dec 7, 1990
January 8, 1999
January 8, 1999
*
January 8, 1999
January 8, 1999
January 8, 1999
January 8, 1999
January 8, 1999
Sept 8, 1998

7758-01-2

potassium bromate January 8, 1999

1120-71-4

propane sultone, 1,3- January 8, 1999

75-56-9

propylene oxide (or 1,2-epoxy propane) Sept 8, 1998**

7782-49-2

selenium and selenium compounds *

1310-73-2

sodium hydroxide *

100-42-5

styrene (or vinyl benzene) *

79-34-5

tetrachloroethane, 1,1,2,2- January 8, 1999

62-55-5

thioacetamide January 8, 1999

108-88-3

toluene (or methyl benzene) *


584-84-9
91-08-7

toluene diisocyanates
toluene-2,4-diisocyanate
toluene-2,6-diisocyanate

Sept 8, 1998**
Sept 8, 1998**

79-00-5

trichloroethane, 1,1,2- January 8, 1999

79-01-6

trichloroethylene Dec 7, 1990**

51-79-6

urethane (or ethyl carbamate) Sept 8, 1998

75-01-4

vinyl chloride (or chloroethylene) Dec 7, 1990**

75-35-4

vinylidene chloride (or 1,1-dichloroethane) *

1330-20-7
108-38-3
95-47-6
106-42-3

xylenes (isomers and mixture)
xylene, m-
xylene, o-
xylene, p-
*
*
*
*

7440-66-6

1314-13-2

zinc and zinc compounds
including, but not limited to:
zinc oxide
*

*

* Compounds not classified as carcinogenic, but have chronic risk values proposed by OEHHA that have not yet been finalized. The effective date is the date the Scientific Review Panel approves the chronic risk value, unless (e)(3) applies;

** Compounds are classified as carcinogenic, but have acute or chronic risk values proposed by OEHHA that have not yet been finalized. The effective date for use of chronic risk values is the date the Scientific Review Panel approves the chronic risk value, unless paragraph (e)(3) applies.

TABLE II

TOXIC AIR CONTAMINANTS WITH PROPOSED RISK VALUES

CAS #

SUBSTANCE

67-64-1

acetone

79-10-7

acrylic acid

107-05-1

allyl chloride

7783-20-2

ammonium sulfate

62-53-3

aniline

1309-64-4

antimony trioxide

arsenic compounds (other than inorganic)

75-15-0

carbon disulfide

630-08-0

carbon monoxide

10049-04-4

chlorine dioxide

532-27-4

chloroacetophenone, 2-

75-45-6

chlorodifluoromethane (HCFC-22)

7440-48-4

cobalt and cobalt compounds

111-42-2

diethanolamine

68-12-2

dimethyl formamide

106-88-7

epoxybutane, 1,2-

100-41-4

ethyl benzene

74-85-1

ethylene

107-21-1

ethylene glycol

96-45-7

ethylene thiourea

 

fluorides and fluoride compounds

87-68-3

hexachlorobutadiene

67-72-1

hexachloroethane

822-06-0

hexamethylene-1,6-diisocyanate

110-54-3

hexane

78-59-1

isophorone

67-63-0

isopropyl alcohol

78-93-3

methyl ethyl ketone (or 2-butanone)

1634-04-4

methyl ter-butyl ether

101-68-8

methylene diphenyl diisocyanate

7697-37-2

nitric acid

156-10-5

nitrosodiphenylamine, p-

7664-38-2

phosphoric acid

115-07-1

propylene

107-98-2

propylene glycol methyl ether

7446-34-6

selenium sulfide

7440-22-4

silver and silver compounds

96-09-3

styrene oxide

7664-93-9

sulfuric acid

79-00-5

trichloroethane, 1,1,2-

121-44-8

triethylamine

1314-62-1

vanadium pentoxide

108-05-4

vinyl acetate

593-60-2

vinyl bromide