TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE G: WASTE DISPOSAL
CHAPTER I: POLLUTION CONTROL BOARD
SUBCHAPTER f: RISK BASED CLEANUP OBJECTIVES
PART 742 TIERED APPROACH TO CORRECTIVE ACTION OBJECTIVES
SECTION 742.APPENDIX B TIER 1 ILLUSTRATIONS AND TABLES


 

Section 742.APPENDIX B   Tier 1 Illustrations and Tables

 

Section 742.TABLE G   Tier 1 Soil Gas Remediation Objectives for the Outdoor Inhalation

Exposure Routea

 

CAS No.

Chemical Name

Residential (mg/m3)

Industrial/Commercial (mg/m3)

Construction Worker (mg/m3)

67-64-1

Acetone

750,000e

750,000e

750,000e

71-43-2

Benzene

420c

800c

1,100c

111-44-4

Bis(2-chloroethyl)ether

1.3c

2.4c

3.4c

75-27-4

Bromodichloromethane

450,000e

450,000e

450,000e

75-25-2

Bromoform

1,800c

3,500c

4,900c

71-36-3

Butanol

29,000e

29,000e

29,000e

78-93-3

2-Butanone (MEK)

380,000e

380,000e

15,000b

75-15-0

Carbon disulfide

1,500,000e

1,500,000e

48,000b

56-23-5

Carbon tetrachloride

290c

550c

770c

108-90-7

Chlorobenzene

36,000b

57,000b

3,700b

124-48-1

Chlorodibromomethane

57,000e

57,000e

150b

67-66-3

Chloroform

110c

200c

290c

95-57-8

2-Chlorophenol

17,000e

17,000e

17,000e

75-99-0

Dalapon

1,500e

1,500e

1,500e

96-12-8

1,2-Dibromo-3-chloropropane

0.14c

0.27c

0.38c

106-93-4

1,2-Dibromoethane

2.9c

5.6c

7.9c

95-50-1

1,2-Dichlorobenzene

11,000e

11,000e

6,700b

106-46-7

1,4-Dichlorobenzene

8,400e

8,400e

6,400b

75-71-8

Dichlorodifluoromethane

890,000b

1,400,000b

92,000b

75-34-3

1,1-Dichloroethane

870,000b

1,300,000e

90,000b

107-06-2

1,2-Dichloroethane

67c

130c

180c

75-35-4

1,1-Dichloroethylene

520,000b

820,000b

5,300b

156-59-2

cis-1,2-Dichloroethylene

1,100,000e

1,100,000e

1,100,000e

156-60-5

trans-1,2-Dichloroethylene

120,000b

190,000b

12,000b

78-87-5

1,2-Dichloropropane

240c

470c

110c

542-75-6

1,3-Dichloropropylene (cis + trans)

1,900c

3,700c

1,400c

123-91-1

p-Dioxane

16c

30c

42c

100-41-4

Ethylbenzene

59,000e

59,000e

8,500b

76-44-8

Heptachlor

0.40c

0.76c

1.1c

118-74-1

Hexachlorobenzene

0.26c

0.28e

0.28e

77-47-4

Hexachlorocyclopentadiene

85b

140b

440b

67-72-1

Hexachloroethane

2,800e

2,800e

2,800e

78-59-1

Isophorone

3,400e

3,400e

1,500b

98-82-8

Isopropylbenzene (Cumene)

30,000e

30,000e

30,000e

7439-97-6

Mercuryf

22e

22e

0.62b

74-83-9

Methyl bromide

12,000b

19,000b

2,400b

1634-04-4

Methyl tertiary-butyl ether

1,200,000e

1,200,000e

23,000b

75-09-2

Methylene chloride

6,100c

12,000c

5,100b

91-57-6

2-Methylnaphthalene

530e

530e

530e

95-48-7

2-Methylphenol (o-cresol)

1,800e

1,800e

410b

91-20-3

Naphthalene

560b

620e

5.8b

98-95-3

Nitrobenzene

6.5c

12c

10b

621-64-7

n-Nitrosodi-n-propylamine

0.056c

0.11c

0.15c

108-95-2

Phenol

1,500e

1,500e

79b

1336-36-3

Polychlorinated biphenyls (PCBs)

---d

---d

---d

100-42-5

Styrene

34,000e

34,000e

16,000b

127-18-4

Tetrachloroethylene

360c

690c

970c

108-88-3

Toluene

140,000e

140,000e

50,000b

120-82-1

1,2,4-Trichlorobenzene

1,000b

1,600b

110b

71-55-6

1,1,1-Trichloroethane

870,000e

870,000e

89,000b

79-00-5

1,1,2-Trichloroethane

170,000e

170,000e

170,000e

79-01-6

Trichloroethylene

1,700c

3,300c

1,500b

75-69-4

Trichlorofluoromethane

2,100,000b

3,400,000b

220,000b

108-05-4

Vinyl acetate

160,000b

250,000b

1,600b

75-01-4

Vinyl chloride

780c

3,000c

3,000b

108-38-3

m-Xylene

52,000e

52,000e

3,100b

95-47-6

o-Xylene

41,000e

41,000e

2,600b

106-42-3

p-Xylene

55,000e

55,000e

3,300b

1330-20-7

Xylenes (total)

49,000e

49,000e

2,900b

 

Chemical Name and Remediation Objective Notations

 

a     For the outdoor inhalation exposure route, it is acceptable to determine compliance by meeting either the soil or soil gas remediation objectives.  The soil remediation objectives for the outdoor inhalation route are located in Appendix B, Tables A and B.

 

b       Calculated values correspond to a target hazard quotient of 1.

 

c     Calculated values correspond to a cancer risk level of 1 in 1,000,000.

 

d     PCBs are a mixture of different congeners.  The appropriate values to use for the physical/chemical and toxicity parameters depend on the congeners present at the site.  Persons remediating sites should consult with IEPA Bureau of Land (BOL) if calculation of Tier 2 or 3 remediation objectives is desired.

 

e     The value shown is the Cvsat value of the chemical in soil gas. The Cvsat of the chemical becomes the remediation objective if the calculated value exceeds the Cvsat value or if there are no toxicity criteria available for the inhalation route of exposure.

 

ILLINOIS REGISTER

POLLUTION CONTROL BOARD

NOTICE OF PROPOSED AMENDMENTS
f     Value for the inhalation exposure route is based on Reference Concentration for elemental Mercury (CAS No. 7439-97-6). Inhalation remediation objectives only apply at sites where elemental Mercury is a contaminant of concern.

 

(Source:  Added at 37 Ill. Reg. 7506, effective May 15, 2013)