Hazardous Waste Determination, RCRA Hazardous Waste Regulations, Uncategorized 40 CFR 261.4(a)(9) – The Hazardous Waste Exclusion for Spent Wood Preservatives Daniel Stoehr September 28, 2013 ← The Requirements for Hazardous Waste in Tanks at a Small Quantity Generator 49 CFR 173.6 – The Materials of Trade Exception →