Hazardous Waste Determination, RCRA Hazardous Waste Regulations 40 CFR 261.4(a)(5) – The Hazardous Waste Exclusion for In Situ Mining Waste Daniel Stoehr September 28, 2013 ← 49 CFR 173.6 – The Materials of Trade Exception 40 CFR 261.4(a)(1) – The RCRA Exclusion for Domestic Sewage →