Guide
40 CFR Part 160 GLP for Pesticide Studies: Inspection-Ready Practice
EPA's Good Laboratory Practice Standards at 40 CFR Part 160 apply to non-clinical health and environmental safety studies submitted in support of pesticide registration under FIFRA. The rule sets out the Study Director's responsibilities, the independent Quality Assurance Unit, the protocol, the raw data definition, the archive, and the statement of GLP compliance that accompanies the final report. EPA inspectors apply the same lens to electronic raw data and computerised systems that FDA applies under 21 CFR Part 58 GLP and Part 11 — attributable, contemporaneous, audit-trailed, complete. This guide walks the structure, the recurring inspection findings, and a practical path to a defensible GLP programme.
Start free trial Free trial, no credit card, onboard in days, not months.
Study Director, QA Unit and the organisational separation
§160.31 places overall responsibility on a single Study Director for each study; §160.35 requires an independent Quality Assurance Unit responsible for monitoring the study and reporting in writing to management and the Study Director. The QA Unit cannot report through the Study Director's management chain — the recurring inspection finding is a QA function that is structurally independent on the org chart but practically subordinate in performance reviews and bonus decisions.
Protocol, amendments and deviations
§160.120 requires a written protocol approved by the Study Director, sponsor and (where applicable) the testing facility management before the study begins. Amendments must be issued before the change is implemented and signed by the Study Director; deviations (changes after the fact) must be documented, justified and acknowledged by the Study Director. EPA inspectors specifically test whether amendment-vs-deviation discipline is real — a protocol "amendment" written after the change is in practice a deviation that has been re-labelled.
Raw data, archive and the 10-year retention
§160.3 defines raw data broadly — any laboratory worksheets, records, memoranda, notes or exact copies that are the result of original observations. §160.190 requires a secure archive with controlled access, indexed for retrieval, retained for the period specified in §160.195 (typically 10 years after submission, longer where the study supports a registration that remains active). Electronic raw data carries the same retention duty; the archive must preserve the data and the metadata (audit trail, dynamic content, conversion logs).
Computerised systems, Part 11-equivalent controls and the data lifecycle
40 CFR Part 160 does not contain a Part 11-style standalone rule for electronic records, but EPA enforces equivalent controls under the GLP umbrella — system validation, access control, audit trails, electronic signatures, change control, backup and disaster recovery. The 2023–2025 inspection cycle has focused heavily on dynamic data (chromatograms, raw spectra, image-based observations) that is converted to PDF for the study file: the PDF is not a substitute for the underlying record, and converting it does not relieve the duty to retain the dynamic original.
A 60-day readiness path
Days 1–10: org-chart audit of QA Unit independence; close any structural-vs-practical separation gap. Days 11–25: protocol-and-amendment discipline review across active studies; reclassify mis-labelled deviations. Days 26–40: archive audit — sample 20 study files at random and test retrieval, completeness and dynamic-data preservation. Days 41–55: computerised system inventory with validation status, audit trail review and access-control review. Days 56–60: rehearse an EPA GLP inspection from arrival to closing meeting using a real study as the worked example.
Where this lives in V5 Ultimate
The clauses above aren't theoretical — every one maps to a shipped module and an industry profile. Jump to the parts of the product that turn this guide into evidence on a Monday morning.
Modules that do the work
Industries this hits hardest
Frequently asked
How does 40 CFR Part 160 differ from FDA 21 CFR Part 58?
The two rules are closely aligned in structure and intent — both stem from the original 1979 GLP framework. Differences are largely scope (pesticides vs human and animal drugs) and the inspection authorities (EPA OECA vs FDA BIMO). Many contract labs run a single GLP programme satisfying both.
Are field studies covered?
Yes — 40 CFR Part 160 covers field studies (residue, ecotoxicity, environmental fate) as well as laboratory studies. The Study Director responsibility, the QA Unit, the protocol, raw data definition and archive apply equally; the practical challenge is the data-capture environment.
Does OECD GLP satisfy 40 CFR Part 160?
OECD GLP is closely aligned and EPA accepts OECD GLP-compliant studies from MAD (Mutual Acceptance of Data) countries for many submission types. Some EPA-specific requirements (raw data scope, archive retention period) may exceed OECD minimums depending on the use of the data.
Is electronic signature acceptable on GLP records?
Yes, where the e-signature meets the integrity expectations EPA applies under GLP (unique to one individual, not reusable, linked to the record, with audit trail). EPA does not run a Part 11-style application process; the controls must be demonstrable on inspection.
See it on your shop floor.
Free trial, no credit card, onboard in days, not months.