A natural gas plant Phase 1 ESA is an environmental due diligence report that documents the current and historical environmental conditions of a gas processing facility before a purchase, refinance, or expansion. A3 Environmental Consultants (A3E) completed a natural gas plant Phase 1 ESA in Corinth, Illinois for Dawood Engineering, Inc., acting on behalf of Keyrock Energy, in spring 2024. The assessment followed ASTM Practice E1527-21 and the USEPA All Appropriate Inquiries rule (40 CFR 312), cost $4,100, and was delivered within the agreed 15–20 business day turnaround. This project profile explains what the assessment covered, why active energy infrastructure needs a specialist’s eye, and what your team can expect from a similar engagement.
Why a Natural Gas Plant Phase 1 ESA Is Different
Most Phase 1 Environmental Site Assessments cover vacant land, retail strips, or warehouses. An active natural gas processing facility raises the stakes. Storage tanks, compressors, dehydrators, condensate handling, and decades of continuous industrial operation each create potential recognized environmental conditions (RECs) that a generalist can miss. Lenders and buyers in the energy sector need an environmental professional who knows what normal looks like at a gas plant — and what doesn’t.
Aerial view of the Corinth, Illinois subject property.
A Phase 1 ESA is also the buyer’s legal shield. Completing All Appropriate Inquiries before closing is what preserves the innocent landowner defense under CERCLA — the federal Superfund law. Skip it, and the new owner can inherit liability for contamination someone else caused. Our guide to environmental due diligence explains how that protection works in any deal.
How A3E Performed the Natural Gas Plant Phase 1 ESA
The Corinth assessment followed the same disciplined process A3E applies to every Phase 1 ESA scope of work:
- Historical records review. A3E reviewed historical aerial photographs, city directories, and fire insurance maps to reconstruct how the property and its neighbors have been used over time.
- Regulatory database search. Federal, state, and tribal environmental databases were searched for the subject property and surrounding properties — spills, tanks, enforcement actions, and cleanup sites.
- FOIA record requests. A3E coordinated Freedom of Information Act requests with the local fire and building departments to surface permits and incident records that never make it into commercial databases.
- Site reconnaissance. A photo-documented walk-through of the facility’s storage tanks, compressors, and process equipment, performed by a licensed Professional Geologist.
Findings were compiled into a final written Phase 1 ESA report and delivered inside the 15–20 business day window — the documentation Dawood Engineering needed to support its client’s environmental due diligence.
Project Snapshot
- Client: Dawood Engineering, Inc. (on behalf of Keyrock Energy)
- Location: Corinth, Illinois (Williamson County) — 37.82°N, 88.78°W
- Service: Phase I Environmental Site Assessment (ASTM E1527-21 / 40 CFR 312)
- Key staff: Alisa Allen, M.S., P.G.
- Duration: March–April 2024
- Value: $4,100
What to Expect From a Natural Gas Plant Phase 1 ESA
For an operating energy facility like the Corinth plant, budget in the range of $3,500–$6,000 depending on acreage, records volume, and site complexity — more than a simple vacant parcel, for the reasons covered in our Phase 1 ESA cost guide. Typical turnaround is 15–20 business days, driven largely by how quickly agencies answer FOIA requests. The deliverable is a complete written report: historical research, database findings, reconnaissance photo log, and the environmental professional’s opinion on whether recognized environmental conditions exist. If you’re earlier in the deal cycle, a preliminary environmental site assessment can screen a property before you commit to the full study.
Frequently Asked Questions
How much does a natural gas plant Phase 1 ESA cost?
The Corinth project was completed for $4,100. Most single-site natural gas facility assessments fall between $3,500 and $6,000, depending on the size of the facility, the volume of historical records, and how many surrounding properties show up in the regulatory database search.
How long does a Phase 1 ESA take at an active facility?
Plan on 15–20 business days. Agency FOIA responses are the usual pacing item; the site reconnaissance itself typically takes a single day, scheduled around facility operations.
What standard governs a Phase 1 ESA?
ASTM Practice E1527-21, which the USEPA recognizes as satisfying the All Appropriate Inquiries rule (40 CFR 312). Following the standard is what preserves CERCLA liability protections for the property buyer.
Does an active gas plant automatically have recognized environmental conditions?
No. Industrial activity raises the odds, but a REC is a professional judgment based on evidence — not a presumption. A well-run facility with intact containment, clean records, and no release history can receive a clean report. That judgment call is why the assessor’s experience with energy infrastructure matters. New to the process? Start with our beginner’s guide to environmental site assessments.
Need a Phase 1 ESA on an Energy or Industrial Facility?
A3E delivers lender-ready Phase 1 ESA reports nationwide, with licensed Professional Geologists who know their way around tanks, compressors, and process equipment. Request a Phase 1 ESA quote or call us at (888) 405-1742.
We Fix Gnarly Environmental Problems
Reviewed by Alisa Allen, M.S., P.G.
