2024 40 CFR 127.13 – Requirements regarding quality assurance and quality control

2023 40 CFR 127.13 – Requirements regarding quality assurance and quality control

2022 40 CFR 127.13 – Requirements regarding quality assurance and quality control

2021 40 CFR 127.13 – Requirements regarding quality assurance and quality control

2020 40 CFR 127.13 – Requirements regarding quality assurance and quality control

2019 40 CFR 127.13 – Requirements regarding quality assurance and quality control

2016 40 CFR 127.13 – Requirements regarding quality assurance and quality control

2015 40 CFR 127.13 – Requirements regarding quality assurance and quality control