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 I   Tier 1 Soil Gas and Groundwater Remediation Objectives for the Indoor Inhalation Exposure Route – Diffusion Onlyj

 

Qsoil equals 0.0 cm3/seca,b

 

 

Soil Gas

Groundwater

CAS No.

Chemical Name

Residential

(mg/m3)

Industrial/

Commercial

(mg/m3)

Residential

(mg/L)

Industrial/

Commercial

(mg/L)

67-64-1

Acetone

750,000g

750,000g

1,000,000h

1,000,000h

71-43-2

Benzene

41d

300d

0.41d

2.6d

111-44-4

Bis(2-chloroethyl)ether

1.9d

14d

6.6d

48d

75-27-4

Bromodichloromethane

450,000g

450,000g

6,700h

6,700h

75-25-2

Bromoform

1,800d

13,000d

170d

1,300d

71-36-3

Butanol

29,000g

29,000g

74,000h

74,000h

78-93-3

2-Butanone (MEK)

380,000g

380,000g

220,000h

220,000h

75-15-0

Carbon disulfide

81,000c

500,000c

170c

820c

56-23-5

Carbon tetrachloride

24d

180d

0.052d

0.31d

108-90-7

Chlorobenzene

8,300c

51,000c

130c

470h

124-48-1

Chlorodibromomethane

57,000g

57,000g

2,600h

2,600h

67-66-3

Chloroform

12d

87d

0.17d

1.1d

95-57-8

2-Chlorophenol

17,000g

17,000g

22,000h

22,000h

75-99-0

Dalaponf

1,500g

1,500g

900,000h

900,000h

96-12-8

1,2-Dibromo-3-chloropropanef

0.17d

1.3d

0.029d

0.21d

106-93-4

1,2-Dibromoethane

1.1d

7.9d

0.073d

0.52d

95-50-1

1,2-Dichlorobenzene

11,000g

11,000g

160h

160h

106-46-7

1,4-Dichlorobenzene

8,400g

8,400g

79h

79h

75-71-8

Dichlorodifluoromethane

32,000c

200,000c

6.8c

33c

75-34-3

1,1-Dichloroethane

81,000c

500,000c

750c

4,100c

107-06-2

1,2-Dichloroethane

10d

76d

0.50d

3.5d

75-35-4

1,1-Dichloroethylene

27,000c

160,000c

61c

300c

156-59-2

cis-1,2-Dichloroethylene

1,100,000g

1,100,000g

3,500h

3,500h

156-60-5

trans-1,2-Dichloroethylene

10,000c

63,000c

58c

310c

78-87-5

1,2-Dichloropropane

36d

260d

0.67d

4.5d

542-75-6

1,3-Dichloropropylene (cis + trans)

110d

830d

0.42d

2.6d

123-91-1

p-Dioxane

15d

110d

140d

1,000d

100-41-4

Ethylbenzene

150d

1,100d

1.3d

8.1d

76-44-8

Heptachlor

0.97d

7.1d

0.058d

0.18h

118-74-1

Hexachlorobenzene

0.28g

0.28g

0.0062h

0.0062h

77-47-4

Hexachlorocyclopentadiene

86c

530c

0.29c

1.5c

67-72-1

Hexachloroethane

2,800g

2,800g

50h

50h

78-59-1

Isophorone

3,400g

3,400g

12,000h

12,000h

98-82-8

Isopropylbenzene (Cumene)

30,000g

30,000g

6.2c

30c

7439-97-6

Mercuryi

22g

22g

0.060h

0.060h

74-83-9

Methyl bromide

830c

5,100c

6.1c

33c

1634-04-4

Methyl tertiary-butyl ether

420,000c

1,200,000g

30,000c

51,000h

75-09-2

Methylene chloride

590d

4,400d

12d

84d

91-57-6

2-Methylnaphthalene

530g

530g

25h

25h

95-48-7

2-Methylphenol (o-cresol)

1,800g

1,800g

26,000h

26,000h

91-20-3

Naphthalene

14d

100d

1.8d

13d

98-95-3

Nitrobenzene

9.0d

66d

23d

170d

621-64-7

n-Nitrosodi-n-propylamine

0.18d

1.3d

3.3d

24d

108-95-2

Phenol

1,500g

1,500g

83,000h

83,000h

1336-36-3

Polychlorinated biphenyls (PCBs)

---e

---e

---e

---e

100-42-5

Styrene

34,000g

34,000g

310h

310h

127-18-4

Tetrachloroethylene

66d

490d

0.26d

1.6d

108-88-3

Toluene

140,000g

140,000g

530h

530h

120-82-1

1,2,4-Trichlorobenzene

800c

4,300g

35h

35h

71-55-6

1,1,1-Trichloroethane

770,000c

870,000g

1,300h

1,300h

79-00-5

1,1,2-Trichloroethane

170,000g

170,000g

4,400h

4,400h

79-01-6

Trichloroethylene

180d

1,300d

1.1d

6.7d

75-69-4

Trichlorofluoromethane

97,000c

600,000c

62c

300c

108-05-4

Vinyl acetate

28,000c

170,000c

2,500c

15,000c

75-01-4

Vinyl chloride

30d

440d

0.065d

0.75d

108-38-3

m-Xylene

17,000d

52,000c

160c

160h

95-47-6

o-Xylene

14,000d

41,000c

170c

180h

106-42-3

p-Xylene

16,000d

55,000c

140c

160h

1330-20-7

Xylenes (total)f

17,000d

49,000c

96c

110h

 

Chemical Name and Remediation Objective Notations

 

a     Compliance is determined by meeting both the soil gas remediation objectives and the groundwater remediation objectives. See Sections 742.505 and 742.515.

 

b     Remediation objectives relying on this table require use of institutional controls in accordance with Subpart J.

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

 

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

 

e     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 BOL if calculation of Tier 2 or 3 remediation objectives is desired

 

f     Groundwater remediation objective calculated at 25°C.  For Dalapon and 1,2-Dibromo-3-chloropropane, the critical temperature (Tc) and enthalpy of vaporization at the normal boiling point (Hv,b) are not available.  For Xylenes (total), the enthalpy of vaporization at the normal boiling point (Hv,b) is not available.

 

g     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.

 

h     The value shown is the solubility of the chemical in water.  The solubility of the chemical becomes the remediation objective if the calculated value exceeds the solubility or if there are no toxicity criteria available for the inhalation route of exposure.

 

i     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.

 

j     Calculated values for the remediation objectives in this table are based on the assumption that the existing or potential building has a full concrete slab-on-grade, though the remediation objectives in this table are also considered protective of occupants of buildings with full concrete basement floors and walls.  This table applies only when the existing or potential building has a full concrete slab-on-grade or a full concrete basement floor and walls.  Institutional controls under Subpart J are required to use remediation objectives in this table.  This table does not apply when the existing or potential building has neither a full concrete slab-on-grade nor a full concrete basement floor and walls, such as a building with an earthen crawl space, an earthen floor, a stone foundation, a partial concrete floor, or a sump.  In such cases, site evaluators have the option of excluding the indoor inhalation exposure route under Section 742.312, meeting the building control technology requirements under Subpart L, or proposing an alternative approach under Tier 3.

 

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