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Separate fuel supply, environmental attributes and reporting claims
Physical consumption
Start with billed fuel use and a documented conversion to a consistent energy unit. Retain the emissions method and reporting boundary used by the responsible sustainability reviewer.
Attribute evidence
For an offset, request the registry, project, methodology, vintage and retirement record. For renewable gas, request the chain of custody and attribute ownership rather than assuming a physical molecule can be traced to your burner.
Claim review
Ask how double counting is prevented and which exact statement the evidence supports. Keep purchased instruments separate from measured reductions in fuel consumption.
Renewable natural gas is not automatically carbon neutral or negative in every lifecycle. Have the applicable reporting framework reviewed before making a public claim. A commodity comparison cannot answer that reporting question.
Worked review: an offset purchase after an efficiency project
Suppose a business reduces measured fuel use from 10,000 to 9,000 therms while holding the comparison boundary consistent. That is a consumption change to investigate and document. It is separate from a subsequent purchase of environmental instruments. Buying an instrument does not change the meter reading or prove that the efficiency project caused every part of the reduction.
Maintain one record for fuel activity and operational changes, a second for the instrument and its ownership or retirement evidence, and a third for the proposed reporting statement. Ask the responsible reviewer whether the applicable framework permits that statement and what disclosures are required. Do not label the fuel physically emissions-free, assume every RNG pathway has the same lifecycle effect, or describe a retirement certificate alone as proof of universal carbon neutrality.
Match each environmental statement to its evidence
EPA describes renewable natural gas as upgraded biogas suitable for uses including pipeline injection. That describes a fuel pathway, not a universal lifecycle result for every product. FTC guidance calls for substantiation of carbon-offset claims. Ask a seller to identify exactly whether the proposal concerns physical gas, an attribute, an offset or a combination before comparing a premium. EPA: renewable natural gas production and uses; FTC: environmental claims and carbon-offset substantiation.
Keep a claim packet separate from the gas invoice
Retain activity data, instrument quantity, registry and retirement documentation, ownership terms and the proposed wording of the claim. Record who reviews the accounting boundary and any uncertainty. A supplier invoice marked green does not replace this packet. Test for duplicate use of the same instrument across a landlord, tenant, supplier and portfolio report before publishing a statement. EPA: inventory boundaries and direct versus indirect emissions.
A claim register with separate quantities
Use separate columns for purchased fuel energy, calculated inventory emissions, operational reductions and purchased instruments. Identify the reporting period and organizational boundary for each. Reconcile instrument quantity to the exact proposed claim and keep ownership and retirement references. When a marketer offers a premium per therm, show that premium separately from commodity cost so the buyer can approve the commercial and reporting decisions independently. Ask whether the same environmental attribute is claimed by another party and document the answer; a low gas price does not resolve an ownership ambiguity.
Use the appropriate planning tool
Gas unit converter: Normalize the fuel activity quantity before applying the separately reviewed emissions method; the converter does not validate an environmental claim.
Sources and review notes
- EPA: renewable natural gas production and uses
- FTC: environmental claims and carbon-offset substantiation
- EPA: inventory boundaries and direct versus indirect emissions
Reviewed October 16, 2026. Program information can change. Confirm the effective utility tariff, supplier availability and written offer before proceeding. Examples and planning tools are educational; they are not executable quotes or verified customer results.