# 35 Ill. Adm. Code 742.215: Section 742.215 Determination of Soil Attenuation Capacity

> Illinois · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P742_S742_215

## Section

- **Citation:** 35 Ill. Adm. Code 742.215
- **Heading:** Section 742.215 Determination of Soil Attenuation Capacity
- **Jurisdiction:** Illinois
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Illinois Administrative Code / Title 35 ENVIRONMENTAL PROTECTION / CHAPTER I: POLLUTION CONTROL BOARD / Part 742 TIERED APPROACH TO CORRECTIVE ACTION OBJECTIVES / Section 742.215 Determination of Soil Attenuation Capacity

## Text

Section
742.215  Determination of Soil Attenuation Capacity
a)         The concentrations of
organic contaminants of concern remaining in the soil shall not exceed the
attenuation capacity of the soil, as determined under subsection (b) of this
Section.
b)         The
soil attenuation capacity is not exceeded if:
1)         The sum of the organic
contaminant residual concentrations analyzed for the purposes of the
remediation program for which the analysis is performed, at each discrete
sampling point, is less than the natural organic carbon fraction of the soil.
If the information relative to the concentration of other organic contaminants
is available, such information shall be included in the sum.  The natural
organic carbon fraction (foc) shall be either:
A)        A default value of 6000
mg/kg for soils within the top meter and 2000 mg/kg for soils below one meter
of the surface; or
B)        A site-specific value as
measured by the analytical method referenced in Appendix C, Table F, multiplied
by 0.58 to estimate the fraction of organic carbon, as stated in, Nelson and
Sommers (1982) or by SW-846 Method 9060: Total Organic Carbon, as incorporated
by reference in Section 742.210;
2)         The total petroleum
hydrocarbon concentration is less than the natural organic carbon fraction of the
soil as demonstrated using a method approved by the Agency.  The method
selected shall be appropriate for the contaminants of concern to be addressed;
or
3)         Another method, approved
by the Agency, shows that the soil attenuation capacity is not exceeded.

## Nearby sections

- [35 Ill. Adm. Code 742.200 Section 742.200  Definitions](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P742_S742_200.md)
- [35 Ill. Adm. Code 742.205 Section 742.205  Severability](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P742_S742_205.md)
- [35 Ill. Adm. Code 742.215 Section 742.215  Determination of Soil Attenuation Capacity](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P742_S742_215.md)
- [35 Ill. Adm. Code 742.220 Section 742.220  Determination of Soil Saturation Limit](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P742_S742_220.md)
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- [35 Ill. Adm. Code 742.225 Section 742.225  Demonstration of Compliance with Soil and Groundwater Remediation Objectives](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P742_S742_225.md)
- [35 Ill. Adm. Code 742.227 Section 742.227  Demonstration of Compliance with Soil Gas Remediation Objectives for the Outdoor and Indoor Inhalation Exposure Routes](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P742_S742_227.md)
- [35 Ill. Adm. Code 742.230 Section 742.230  Agency Review and Approval](https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P742_S742_230.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_IL_IAC_T35_P742_S742_215. Check the current official text before relying on it. Not legal advice.