Embodied carbon is the new procurement spec. Check which rule is in your contract.
Sustainable construction procurement is buying materials against embodied-carbon limits, proven by Environmental Product Declarations (EPDs). The executive order behind the Federal Buy Clean Initiative was revoked in January 2025, but GSA still publishes global warming potential (GWP) limits, so request EPDs at bid time and compare each vendor's GWP, not just price.
Which sustainability rules apply to a project?
Three kinds of rule can apply: federal requirements, state Buy Clean laws and voluntary certifications, and a project can have more than one. As of October 2026, the executive order that created the federal Buy Clean Initiative has been revoked and Congress has rescinded unobligated funds for the Inflation Reduction Act’s low-carbon materials programs, but GSA’s page, last updated 28 July 2025, still lists its limits and EPD requirement for materials bought with those funds, and the solicitation says what a given federal project requires. State Buy Clean laws (CA, CO, NJ, NY, MN, WA, OR) layer additional reporting on state-funded projects. Voluntary certifications — LEED, Living Building Challenge, BREEAM — sit on top and often shape owner specs even when no federal money is involved. Treat them as a stack, not as alternatives.
| Regime | What it requires | Trigger | Documentation | Penalty for non-compliance |
|---|---|---|---|---|
| FEDERAL (GSA LIMITS) | GSA’s published limits for concrete, cement, concrete masonry units, asphalt, steel and glass, for materials bought with Inflation Reduction Act funds. Each limit is a GWP (Global Warming Potential) figure the product’s EPD must show. | Materials bought with Inflation Reduction Act funds. The solicitation says what a given federal project requires. | A product-specific Type III EPD (third-party verified) that follows the product category rule GSA names and conforms with ISO 14025 and ISO 21930, with facility-specific data where feasible. | Not stated on GSA’s page; the contract sets the consequence. |
| STATE BUY CLEAN | State-funded public works. Range: the Buy Clean California Act (carbon steel rebar, flat glass, insulation and structural steel) to Oregon Buy Clean (structural concrete + structural steel). Each state sets its own GWP thresholds + reporting cadence. | State agency owner. Project threshold varies — CA: $250K+ ; CO: most public; NY: state-funded buildings > 100K sqft. | State-issued reporting forms, EPD submission, sometimes contractor attestation. | Bid rejection, civil penalties, state contract debarment. |
| CERTIFICATION | LEED v5 (embodied-carbon prereq), Living Building Challenge, BREEAM, Green Globes. Voluntary for the owner, contractual for you once specified. | Owner spec — usually written into the schematic-design phase. Once in the contract, the threshold is yours to meet. | USGBC submission portal, third-party LCA assessor verification, EPD + HPD library. | Loss of certification (and any associated tax / financing incentives), owner withholds. |
The federal picture has changed since 2025. Executive Order 14148 of 20 January 2025 revoked Executive Order 14057, which created the Federal Buy Clean Initiative, and the initiative’s page on sustainability.gov is archived. Public Law 119-21 of 4 July 2025 rescinded the unobligated balances for sections 60112, 60116 and 60503 of the Inflation Reduction Act, the environmental product declaration assistance, low-embodied carbon labeling and federal-building low-carbon materials programs. Check the current solicitation and the agency’s own page before you rely on a threshold.
How do you handle Buy Clean from spec to closeout?
Read the spec for "low-carbon" language
CSI Division 01 81 13 (Sustainable Design Requirements) is your roadmap. Flag any EPD/HPD/LCA language at bid review. Don't wait until submittals to find out the spec required Type III EPDs.
Identify covered materials
GSA’s limits cover concrete, cement, concrete masonry units, asphalt, steel and glass; a spec may add insulation, gyp board, carpet. Map each to the corresponding division and flag the EPD requirement on the submittal log.
Request EPDs at bid time
Bake into the bid invitation: "Submit Type III EPD with quote." You'll learn fast which vendors are EPD-ready and which will scramble. Use early to differentiate. Bid Leveling's compliance check flags any vendor whose bid stays silent on a sustainability/EPD disclosure the RFQ actually asked for — it can't verify a bid-stage GWP figure or an EPD's type/scope (no product submittal exists yet to review), but a missing disclosure won't slip through unnoticed.
Compare GWP, not just price
Vendor A: $0.18/lb @ 1.2 kgCO2e/kg. Vendor B: $0.20/lb @ 0.8 kgCO2e/kg. On a Buy-Clean project, B wins even at +11% material cost — A may be bid-disqualifying.
Lock substitution rules
Most contracts allow "or equal" substitutions — but on Buy Clean projects, "equal" must include GWP equivalence. Substituting in a higher-carbon product mid-project = breach.
Track EPDs in submittal log
Each Type III EPD = one document with an expiration date. Track issue date + expiration; an EPD that expires mid-project is a closeout problem.
Reference EPD findings at closeout
Submittal Reviewer's EPD/HPD findings travel with each submittal record — Closeout Builder now rolls the flagged ones (missing, expired, wrong-scope, or over-threshold EPDs/HPDs) up into the closeout package automatically, grouped by CSI division, instead of you re-hunting PDFs. One honest caveat: this is a rollup of flagged issues, not a total embodied-carbon budget — a fully compliant EPD produces no finding at all, so a clean rollup means no issues were flagged, not a verified zero-carbon inventory.
What is an Environmental Product Declaration?
An EPD is a third-party-verified report of a product's environmental impacts across its lifecycle — from raw-material extraction through manufacturing. The number that matters most for Buy Clean compliance is GWP (Global Warming Potential, in kgCO2 equivalent per declared unit). Under ISO 14025, "Type III" describes how the data was verified — independently reviewed against a Product Category Rule — and the GSA criteria ask for a third-party verified, product-specific EPD. They also ask for facility-specific data where feasible, rather than industry or manufacturer average data.
GSA documentation checklist
- Third-party verified (Type III) — independently reviewed against the product category rule GSA names for that material (the NSF, UL, SCS Global Services and National Asphalt Pavement Association rules are among those it lists).
- Product-specific, with facility-specific data where feasible — GSA asks for facility-specific data rather than industry or manufacturer average data. If an EPD with facility-specific data for the most carbon-intensive processes is unavailable, an EPD without it that meets the other criteria is sufficient.
- Conforms to ISO 21930 + ISO 14025 — the EPD methodology standards. Listed inside the EPD document under "Standards."
- Within its validity period — EPDs expire; UL's EPD program, for example, runs five years from the declaration date. Check the "valid until" date on the cover page.
- Declared unit + GWP — clear numeric value in kgCO2e per cubic yard (concrete), per ton (steel), per square meter (glass), per ton (asphalt).
- System boundary — must be cradle-to-gate at minimum (A1-A3 in EN 15978 terms). Cradle-to-grave (A1-D) is more complete but rarely required.
GSA limits for IRA-funded materials (page updated 28 July 2025)
- Each line gives GSA’s three limits in this order: top 20%, top 40%, better than average.
- Concrete (3000 psi): 257 / 291 / 318 kgCO2e per cubic meter.
- Concrete (4000 psi): 284 / 326 / 352 kgCO2e per cubic meter.
- Steel — hot-rolled sections (fabricated): 1,022 / 1,128 / 1,163 kgCO2e per metric ton.
- Steel — rebar (fabricated): 728 / 794 / 850 kgCO2e per metric ton.
- Flat glass: 1,331 / 1,370 / 1,401 kgCO2e per metric ton.
- Asphalt: 55.4 / 64.8 / 72.6 kgCO2e per metric ton.
- GSA also lists limits for cement, concrete masonry units and other steel products, and adds 30% to the concrete limits where high-early-strength mixes are required for technical reasons.
Which mistakes get bids disqualified?
Industry-wide EPD where the spec requires facility-specific
Vendor sends an industry-wide EPD — Type III verified, looks the part, but GSA asks for a product-specific EPD with facility-specific data where feasible, not industry or manufacturer average data. Check the spec; if it requires facility-specific, reject at submittal review.
Expired EPDs in the closeout package
EPDs expire (five years from the declaration date in UL's program, for example). A 4-year-old EPD on a 2-year project closes out fine; on a 3-year project it expires mid-stream. Re-cert + re-issue is the vendor's burden — but it's your sequencing problem.
Substituted product without GWP equivalence
Vendor swaps Type II concrete for Type V to ease pour. Spec lists "Type V or equivalent." The two can carry different GWPs. "Or equivalent" on a Buy Clean project means GWP equivalence too.
No GWP check before award
Awarded the lowest-price quote — only to find at submittal that the EPD exceeds the spec threshold. Ask for the EPD before award if you can; Submittal Reviewer catches an out-of-threshold or industry-average EPD at the next stage either way.
Treating LEED as "the architect's problem"
LEED v5 prerequisites attach to materials you procure. If the project loses LEED Silver and pricing was conditioned on it, the owner's claim lands on the GC + the responsible sub.
EPDs in PDF, not in the system
100 EPDs in a SharePoint folder = closeout discovery hell. Index at submittal time, attach to the procurement record, aggregate at month-end.
Embodied carbonis a budget line now.
As of October 2026. Figures: GSA’s limits page (last updated 28 July 2025), Public Law 119-21 (sections 60011, 60015 and 60021) and UL’s EPD program terms; see Sources below.
Compliant procurement doesn't have to cost the project.It has to be tracked.
Trueleveler's Submittal Reviewer reads the spec, extracts each submittal's EPD/HPD, and flags Buy-Clean non-compliance before it becomes a closeout surprise. Founding 25 cohort: $99/mo locked for life.
Claim founding spot →Sources
- Inflation Reduction Act low-embodied carbon material requirementsU.S. General Services AdministrationGSA’s global warming potential limits and its product-specific EPD requirement for concrete, cement, masonry units, asphalt, steel and glass.
- LEED v5U.S. Green Building CouncilThe U.S. Green Building Council page for the LEED v5 rating system and its credit library.
- Initial Rescissions of Harmful Executive Orders and Actions (Executive Order 14148)The White HouseThe 20 January 2025 order that revokes Executive Order 14057, which created the Federal Buy Clean Initiative.
- Public Law 119-21, sections 60011, 60015 and 60021: rescission of Inflation Reduction Act fundingU.S. Government Publishing Office, govinfoThe sections that rescind unobligated funds for the Inflation Reduction Act’s environmental product declaration, low-embodied carbon labeling and federal-building low-carbon materials programs.
- UL Environmental Product Declaration program termsUL SolutionsUL’s terms for its EPD program, whose declarations run for five years from the declaration date.
- California Public Contract Code section 3501: Buy Clean California Act definitionsCalifornia Legislative InformationThe Buy Clean California Act’s list of eligible materials: carbon steel rebar, flat glass, insulation and structural steel.