Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 742 - TIERED APPROACH TO CORRECTIVE ACTION OBJECTIVES › Subpart L - BUILDING CONTROL TECHNOLOGIES › Appendix C - Tier 2 Illustrations and Tables › Table L - J and E Equationsa

Current through Register Vol. 48, No. 28, July 12, 2024
Indoor air remediation objectives
								(mg/m3)
For carcinogenic contaminants
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J&E1
For noncarcinogenic contaminants
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J&E2
To convert mg/m3 from
								parts per million volume
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Note: 24.45 equals the molar volume of air in
								liters at normal temperature (25°C) and pressure (760 mmHg).
J&E3
Soil gas remediation objective
								(mg/m3)
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J & E4
Soil Vapor Saturation Limit
(mg/m3-air)
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J&E5
Groundwater remediation objectives
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J&E6
Attenuation factor
Attenuation factor when the mode of contaminant
								transport is both diffusion and advection
Qsoil = 83.33
								cm3/sec
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J&E7
Attenuation factor when the mode of contaminant
								transport is diffusion only
Qsoil= 0
								cm3/sec
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J&E8
Total overall effective diffusion coefficient for
								vapor transport in porous media for multiple soil layers
								(cm2/s)
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J&E9a
In Equation J&E9a, the following condition must
								be satisfied:
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J&E9b
Source to building separation (cm)
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J&E10
Effective diffusion coefficient for each soil layer
								(cm2/s)
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J&E11
Surface area of enclosed space at or below grade
								(cm2)
For a building with a full concrete
								slab-on-grade
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J&E12a
Surface area of enclosed space at or below grade
								(cm2)
For a building with a full concrete basement floor
								and walls
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J&E12b
Building ventilation rate
								(cm3/s)
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J&E13
Area of total cracks
								(cm2)
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J&E14
Effective diffusion coefficient through the cracks
								(cm2/s)
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J&E15
Total porosity
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J&E16
Water-filled soil porosity
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J&E17
Air-filled soil porosity
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J&E18
a This table contains equations
					 based on the assumption that the existing or potential building has a full
					 concrete slab-on-grade or a full concrete basement floor 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 develop remediation objectives
					 pursuant to 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.