Section 258.50  Remediation Suitability Determination

Contaminated soil  that is the subject of an application for Department issuance of written authorization for land application must be evaluated for  remediation suitability in accordance with this Section.

a)         The applicant must develop an appropriate, site-specific list of agrichemicals known or suspected to have been released at the spill site.  The compounds  included in Appendices A and B of this Part may  serve as a guide to the applicant in the development of the site-specific list of target pesticides and nutrients.  Unless affirmatively demonstrated that an agrichemical has not been stored, mixed or loaded at the spill site, all pesticides listed in Appendix B must be considered target agrichemicals.

b)         The contaminated soil  must be sampled in accordance with the requirements of this Part and analyzed for the presence and concentration of the target agrichemicals  included on the list of compounds  required in subsection (a) of this Section.

c)         If the list required in subsection (a) of this Section includes any of the pesticides listed  in Appendix A of this Part, the mean concentration of the pesticide in the soil must be determined in accordance with the sampling and analysis procedures of Section 258.90. The mean pesticide concentrations of the contaminated soil must be compared to its associated Remediation Suitability Determination Level (RSDL) obtained from Appendix A of this Part.  If the mean remediation media concentration for any pesticide listed in Appendix A of this Part is equal to or greater than its associated Remediation Suitability Determination Level,  the contaminated soil may not be suitable for land application.

(Source:  Amended at 26 Ill. Reg. 17155, effective November 18, 2002)