Caltrans EPD Rollout: What Suppliers Must Know
Caltrans has shifted EPDs from buzzword to bid requirement. Starting with steel and flat glass and now expanding to asphalt and concrete, the agency ties payment withholds and even project eligibility to the carbon numbers in your declaration. Miss an upload and you could see a $6,000 withhold land on the jobsite paperwork, yet nail the process and you can tap into FHWA rebates that offset your LCA spend. Here is the short, sharp guide manufacturers asked for.
Why Caltrans cares about your EPD
California’s transportation agency pours more concrete than any state DOT and burns through enough asphalt to circle the globe. Tracking the cradle-to-gate global-warming potential (GWP) of those materials lets engineers hunt for low-carbon swap-outs without guessing. That mandate flows straight from the Buy Clean California Act and now lives inside Caltrans specs (Caltrans, 2025).
Key dates and materials
- Carbon-steel rebar, structural steel, flat glass, and mineral-wool board insulation: EPDs required on projects advertised after January 1 2023.
- Hot-mix asphalt, concrete, and CMU: EPD submittals mandatory for bids opened on or after February 1 2025 (CPD 24-8, 2025).
Miss the date and the resident engineer can withhold up to $6,000 per missing declaration on concrete or asphalt pours (Caltrans, 2025).
The paperwork pipeline
Every declaration travels through the Caltrans EPD Database, not email, not thumb drives. Suppliers have five business days after shipment (steel) or 30 days after placement (concrete/asphalt) to log EPDs plus quantity and intended use. The system auto-flags expired PCRs and non-verified PDFs, saving the inspector the hassle but catching errors early.
Money on the table
Through the FHWA Climate Challenge, each plant can claim $4,500 per verified EPD, capped at $18,000 per company until April 1 2026 (FHWA, 2025). That covers a healthy slice of typical LCA service fees and turns compliance from sunk cost into near-break-even exercise.
Choose your PCR wisely
Caltrans expects the current PCR on bid day. If the rulebook expires mid-project you keep using the older EPD until renewal. Concrete suppliers often lean on the National Ready Mixed Concrete Association Part B PCR; asphalt producers look to the Asphalt Institute’s document. Steel mills may pivot in 2026 when the Smart EPD PCR update lands. Confirm early or risk a file-format ping-pong with reviewers.
Checklist for manufacturers racing the spec
- Confirm project thresholds: ≥175 working days and ≥$1 million triggers the spec.
- Pick one reference year of plant data (calendar 2024 works for bids hitting in early 2025).
- Collect A1–A3 energy, raw-material, and waste numbers—utilities bills matter more than you think.
- Hire a program-operator-approved verifier who can turn revisions in under a week. The slower outfits will kill your float.
- Upload the PDF and the machine-readable XML so Caltrans can crunch GWP instantly.
- Keep the verifier on speed dial for addenda, because mix tweaks after award still need fresh EPDs.
Bottom line without the drumroll
Caltrans has laced EPDs into payment, risk, and even incentive dollars. Manufacturers that organise plant data now will glide through submittals and pocket FHWA reimbursements. Those that wait will recieve frantic Friday calls about withheld pay quantities. Choose your path.
Frequently Asked Questions
Does Caltrans accept industry-average EPDs for asphalt or concrete mixes?
No. Specifications require product- and facility-specific, third-party-verified EPDs that list separate GWP values for stages A1, A2, and A3 (FHWA, 2025).
What happens if my PCR expires during construction?
You may continue using the issued EPD until its five-year validity ends. When you renew, the new or updated PCR must be used (Caltrans, 2025).
Can I bundle multiple mix designs into one EPD?
Only if the PCR explicitly allows grouping. Caltrans review staff routinely reject shot-gun EPDs that average dissimilar mixes, so one mix, one declaration is safest.
How fast should I expect a Caltrans reviewer to accept my upload?
Typical turnaround is three to five business days if the XML passes validation. Missing quantity data or outdated PCR references can double that timeline.
About the Author
Walker Ryan is a climate-tech entrepreneur focused on driving industrial decarbonization through better data. As the founder and CEO of Parq, he helps manufacturers generate high-quality, third-party–verified carbon disclosures at scale—accelerating a traditionally slow and expensive process. Before starting Parq, Walker led over $200 million in sustainability-focused investments as VP of Strategy & Growth at ReStream Solutions, following earlier experience in investment banking at Deutsche Bank. He brings a rare mix of capital markets expertise and hands-on sustainability knowledge to tackling the infrastructure of industrial emissions.
