Closing a manufacturing plant: records you must keep for decades

Why plant records outlive the plant#

Plant records outlive the plant because the claims and questions they answer arrive late. An occupational illness can surface long after the exposure, a regulator or property buyer can ask about contamination after the site is sold, and a retiree can ask about pension credit decades after the last shift.

Closure checklists usually focus on equipment, utilities, inventory and people. Records get attention only when someone tries to cancel a software subscription or clear out the safety office, which is often too late to sort them well or to find the person who knows what the binders contain.

Long-retention records at a closing plant#

Long-retention records at a closing plant fall into a handful of families: worker health and safety, environmental, employee benefits, product and quality, and property and tax. Exact periods depend on the rule, the substance or product and the state, so treat the table as a map of what to ask counsel about, not as a list of periods.

What OSHA's records access standard means at closure#

OSHA's standard on access to employee exposure and medical records, 29 CFR 1910.1020, requires employers to preserve those records for decades and to give employees and their designated representatives access to them. Exposure records and analyses based on them must be kept for at least 30 years, and medical records for the duration of employment plus 30 years unless a specific standard sets a different period. Background laboratory data may need only one year if the sampling results, plan, methods and a summary are kept for 30 years. Medical records held by a contracted occupational health clinic may still fall under the employer's obligations, so confirm with counsel who holds them and for how long.

The standard also addresses employers that cease to do business, including passing records to a successor employer and notifying employees about their access rights. Substance-specific standards, such as those for lead, asbestos, silica and noise, add their own monitoring and recordkeeping requirements. Read the current regulation text with counsel before deciding where any of these records go.

Do not treat these files as ordinary HR records. They contain personal health information, so the custodian needs access controls, a process for former employees' requests and a plan that covers the full retention period.

Who becomes the records custodian?#

The records custodian is the person or entity that keeps closure records after the plant is gone and answers requests for them. In a multi-plant company it is usually the parent or another operating site; in a sale it may be the buyer; in a full wind-down it may be a successor entity, a trustee or a commercial records storage provider under contract.

Write the custodian arrangement into the closure plan and into any sale or wind-down agreement. If the company is dissolving, counsel should confirm how state law on dissolved corporations affects who remains responsible for records and claims.

• 1A named custodian entity and a named contact person, with a backup.
• 2A written inventory of what was transferred, in what format and where it is stored.
• 3Funding for storage, retrieval and eventual destruction across the full period.
• 4A request process for former employees, regulators, insurers and customers.
• 5Access controls for medical, exposure and personnel records.
• 6Destruction instructions for when each period ends, with certificates.

Preserve first, then sort#

The safest closure sequence preserves everything first and sorts second. Decisions about destruction take time and judgment, while exports from systems about to be shut off cannot wait for those decisions.

• 1Step 1: confirm legal holds with counsel and suspend disposal for anything they cover.
• 2Step 2: list every system holding plant records, including EHS software, HRIS, payroll, the occupational health provider's portal, ERP, MES, QMS, CMMS and the historian.
• 3Step 3: export complete records and attachments before subscriptions end, in formats readable without the original software.
• 4Step 4: index paper records room by room, including binders, site maps, sampling logs and drawings.
• 5Step 5: separate long-retention families from records already past their period under the retention schedule.
• 6Step 6: transfer long-retention records to the custodian with a signed inventory.
• 7Step 7: destroy expired records securely and keep certificates of destruction.
• 8Step 8: assess whether retained operational records, such as maintenance and production history, are candidates for licensing.

Illustrative: a foundry closes its older plant#

Illustrative: a fictional iron foundry company decides to close the older of its two plants and consolidate production. The plant runs silica and noise monitoring programs, an outside occupational health clinic holds audiograms and exam results, injury logs sit in EHS software and years of air sampling data fill binders in the safety office.

The plant GM and the CFO name the remaining plant as custodian, sign a records transfer agreement with the clinic, export the EHS system and scan the binders while keeping the originals until counsel confirms that scans are acceptable. Environmental permits, stormwater reports and waste manifests go to the corporate EHS manager, who expects questions when the site is sold.

The outcome is one indexed archive with a named owner, a request process for former employees and certificates for everything destroyed. Separately, the company keeps maintenance and melt records from the closed plant as candidates for a future license, with exposure and medical records excluded from the start.

Can any closure records be licensed?#

Some closure records can be licensed, but not the ones this article mostly covers. Exposure, medical, personnel and benefit records contain personal and health information and are kept for legal reasons, so they stay outside any data license.

Operational records are different. Production history, maintenance work orders, quality decisions and process data from a closed plant can be useful to AI developers when they are linked to outcomes and the company holds the rights. Licensing a prepared copy does not change retention: the originals stay with the custodian under the schedule.

SourceX works with closing and wound-down companies through the SourceX five-step transaction, starting with a metadata-only fit check before systems are switched off. The Rights step covers legal holds, customer contracts and the custodian arrangement, and the supplier approves each step before anything is delivered.