2024 40 CFR 141.131 – Analytical requirements

2023 40 CFR 141.131 – Analytical requirements

2022 40 CFR 141.131 – Analytical requirements

2021 40 CFR 141.131 – Analytical requirements

2020 40 CFR 141.131 – Analytical requirements

2019 40 CFR 141.131 – Analytical requirements

2016 40 CFR 141.131 – Analytical requirements

2015 40 CFR 141.131 – Analytical requirements

2014 40 CFR 141.131 – Analytical requirements