2024 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2023 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2022 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2021 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2020 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2019 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2016 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2015 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2014 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2010 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation
2009 40 CFR 312.31 – The degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation