Section 259.240  Groundwater Cleanup Objectives

a)         The groundwater cleanup objectives for Class I and Class II groundwater are listed in Appendix D of this Part.

b)         The applicant may use the Class II groundwater cleanup objectives in Appendix D of this Part to calculate a site-specific SCO using the equations in Section 259.350 of this Part, if adequately demonstrated, during an initial, final or detailed site assessment, that the uppermost 15 feet of groundwater underlying the contaminated area is classified as Class II groundwater.  If this cannot be demonstrated, the Class I groundwater objective shall be used.

c)         If groundwater samples from a facility contain pesticides for which groundwater cleanup objectives are not listed in Appendix C of this Part, the applicant should contact the Department for a determination of the groundwater objective.

(Source:  Added at 32 Ill. Reg. 1308, effective January 21, 2008)