Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 742 - TIERED APPROACH TO CORRECTIVE ACTION OBJECTIVES › Subpart L - BUILDING CONTROL TECHNOLOGIES › Appendix B - Tier 1 Illustrations and Tables › Table I - Tier 1 Soil Gas and Groundwater Remediation Objectives for the Indoor Inhalation Exposure Route - Diffusion Onlyj

Current through Register Vol. 48, No. 28, July 12, 2024
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.