Section 30.331 - Recordkeeping(1)Retention of Manifest Documents. Whenever required or whenever used even if not required, manifests signed in compliance with 310 CMR 30.311 through 30.313 shall be kept by the generator for three years from the date the waste was accepted by the initial transporter.(2)Agreements.(a) A generator that reclaims wastes pursuant to a contractual agreement and uses a form pursuant to 310 CMR 30.314 shall retain a copy of the reclamation agreement referenced therein for three years after its termination or expiration.(b) A generator that sends research study samples to a research facility pursuant to a contractual agreement and uses a manifest pursuant to 310 CMR 30.315 shall retain a copy of the agreement referenced therein for three years after its termination or expiration.(3) A generator shall keep a copy of all reports required pursuant to 310 CMR 30.332 or 310 CMR 30.333 as follows: (a) Each Biennial Report shall be kept for a period of at least three years from the due date of the report.(b) Each Exception Report shall be kept for a period of at least three years from the due date of the report.(4) A generator shall keep records of any test results, waste analyses, or other determinations made in compliance with 310 CMR 30.302 for at least three years from the date that the hazardous waste was last sent to treatment, use, storage, disposal, at or off the site of generation.Amended by Mass Register Issue 1522, eff. 5/24/2024.Amended by Mass Register Issue 1524, eff. 5/24/2024.