Examples
Worked examples
- Is an instance
A microscopy facility audits two weeks of waste and discovers that 28 kg of slides could be glass-recycled rather than landfilled.
- Is an instance
An institution rolls out a quarterly mini-audit programme using a one-page tally sheet.
Counter-examples
Looks similar, but isn't
- Not an instance
A general office paper-recycling weigh-in is not a lab audit.
- Not an instance
An automated dustbin sensor without categorisation does not produce audit-grade data.
Editorial commentary
A lab waste audit is a structured, time-boxed exercise — typically one to four weeks — in which a lab segregates, weighs, and categorises every waste stream it produces: general/black-bag, mixed recycling, glass, hazardous chemical, sharps, biological, and electronic. The point is a real baseline, not an impression: photographing and weighing each stream converts a vague sense that “too many gloves are used” into a defensible number that can be tracked year over year and compared against peer labs.
Where it sits in certification frameworks
Waste auditing is an entry-level activity under the LEAF (Laboratory Efficiency Assessment Framework), developed by UCL and run as a self-assessment platform across three tiers — Bronze, Silver and Gold — with certification lasting two years before a lab must reapply. LEAF’s waste criteria escalate by tier: Bronze focuses on correct signage, segregation and disposal routes being in place at all; Silver asks labs to actively pursue carbon-reduction routes for specific waste streams; Gold requires measuring the impact of the changes made, which an audit is what supplies. My Green Lab‘s certification programme includes an equivalent waste module.
Using the results
An audit’s value comes from acting on the breakdown, not just producing it: if hazardous waste mass is dominated by a single reagent or a disposable plastic item, that is the concrete substitution target, not a generic reduce-waste resolution. Many labs repeat a lighter mini-audit quarterly, using a one-page tally sheet, and a full audit annually to track trend. Results typically feed a lab’s research carbon footprint estimate and, where relevant, a grant’s climate impact statement.
Scope note
A general office paper-recycling weigh-in or an automated bin-fill sensor without stream categorisation does not produce audit-grade data — categorisation by stream and disposal route is what makes it a lab waste audit rather than a facilities metric. See lab waste disposal for the regulatory disposal-route side and waste minimization plan for turning audit findings into a formal plan.
References
- LEAF Bronze/Silver/Gold criteria (UCL); My Green Lab Waste module.
Also known as
Laboratory waste audit · Waste characterisation (lab)
Machine-readable encodings
Use in your systems
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