With this notice, EPA promulgated, in interim final form, amendments to the groundwater monitoring standards for certain hazardous waste surface impoundments used to neutralize corrosive wastes. The amendments provided for a waiver of these standards for any surface impoundment that:
- Contains wastes which are hazardous only because they exhibit the corrosivity characteristic and contains no other hazardous wastes, and
- rapidly neutralizes the wastes so that there is no potential for migration of any hazardous waste out of the impoundment.