Procedures for establishing soil performance standards

Procedures for establishing soil performance standards. (1) General. If a responsible party selects this option, performance standards shall be established and maintained so that the residual contaminants in the soil do not pose a threat to public health, safety, or welfare or the environment. (2) Protection of groundwater. Acceptable performance standard options to address the soil to groundwater pathway may include any of, or any combination of, the following: (a) Placement of a permanent engineering control such as a cap or cover to limit infiltration and thereby minimizing the leaching of soil contaminants to groundwater that is constructed and maintained until the threat to groundwater no longer exists. (b) Use of natural attenuation to contain and remediate the contaminants present. (c) Operation of a system in compliance with ch. NR 724 until the lowest concentration that is practicable is achieved. (3) Protection from direct contact. Acceptable performance standard options to address the direct contact pathway may include either of, or a combination of, the following: (a) Placement of a permanent engineering control such as a cap or cover that is constructed and maintained until the direct contact threat no longer exists. (b) Operation of a system in compliance with ch. NR 724 until the lowest concentration that is practicable is achieved.