What We Do
Services
Flatirons Environmental Solutions is a full-service environmental consulting and contracting firm. We work with construction contractors, industrial facilities, oil and gas operators, property owners, and federal and municipal clients — providing due diligence, compliance program development, stormwater management, remediation, permitting, and regulatory support across the project lifecycle. Our clients range from companies managing complex multi-site operations to organizations navigating environmental requirements for the first time.
Due Diligence & Site Investigation
We conduct Phase I and Phase II Environmental Site Assessments, subsurface investigations, and contamination evaluations for property transactions, lender requirements, and regulatory closure. Whether the concern is legacy industrial contamination, PFAS, or an unknown release, we scope the work, run the investigation, and deliver findings that hold up under regulatory and transactional scrutiny.
Representative Services
- Phase I Environmental Site Assessments (ASTM E1527-21)
- Phase II subsurface investigation and sampling
- Contamination site investigation and source delineation
- PFAS investigation and remedial planning
Environmental Compliance Support & Development
Environmental compliance isn't a one-time task — it's an ongoing obligation across permits, plans, inspections, and agency relationships. We build and manage the programs that keep facilities and projects in compliance: spill prevention, stormwater, hazardous waste, air quality, and groundwater programs. We write the plans, conduct the inspections, handle the reporting, and represent clients in agency correspondence so nothing gets missed between deadlines.
Representative Services
- Spill Prevention, Control, and Countermeasure (SPCC) plan development and program management
- Multi-media compliance audits (CAA, CWA, RCRA, EPCRA)
- Hazardous waste management and RCRA compliance
- Regulatory agency correspondence and inspection support
- Air quality permit compliance and monitoring support
- Long-term groundwater monitoring programs and reporting
- SWPPP development, stormwater inspections, BMP oversight, and corrective action tracking
- Endangered Species Act (ESA) support, biological assessments, and surveys
NEPA Support
- Categorical Exclusion (CATEX)
- Environmental Assessment (EA) and Environmental Impact Statement (EIS) support
SWPPP & Stormwater
A core focus of our practice: Stormwater Pollution Prevention Plan development and recurring construction site inspections, keeping projects compliant with Colorado's stormwater discharge permit requirements from groundbreaking through closeout.
Representative Services
- Site-specific SWPPP development for NPDES and state permits
- Qualified SWPPP practitioner inspections and BMP oversight
- Corrective action tracking and permit reporting
- Post-construction stormwater management
- Industrial SWPPP under NPDES Multi-Sector General Permit
- MS4 compliance and local stormwater permit support
Construction & Industrial Compliance
Embedded environmental oversight for general construction, industrial facilities, and commercial operations — utilities, transportation, commercial development, and renewable energy. We keep your project and facility compliant from groundbreaking through closeout without slowing down the schedule.
Representative Services
- Environmental protection plans and pre-construction work plans
- Erosion and sediment control plan development
- Owner's representative and environmental compliance monitoring
- Biological monitoring and sensitive resource avoidance
- Contractor environmental awareness training
- ISO 14001 Environmental Management System development
- Industrial stormwater (NPDES Multi-Sector General Permit)
Oil & Gas Compliance
We support oil and gas operators from project planning through site closure — permit coordination, construction compliance, operational inspections, and reclamation. Whether you're breaking ground on a new well pad, managing an active production facility, or working toward regulatory closure, we handle the environmental side so operations stay on schedule and in compliance.
Representative Services
- Pre-construction environmental planning and permit review
- SWPPP development for well pad and pipeline construction
- Construction site stormwater inspections (COGCC, NPDES)
- Spill prevention and secondary containment compliance (SPCC)
- Optical Gas Imaging (OGI) surveys and LDAR programs
- Production facility environmental audits
- Multi-media compliance audits (CAA, CWA, RCRA, EPCRA)
- Produced water and E&P waste management compliance
- Federal and state permit coordination (BLM, COGCC, BIA)
- Reclamation planning and closeout documentation
- EPA Subpart OOOOa and OOOOb fugitive emissions monitoring, survey scheduling, and compliance reporting
Our clients
Who We Work With
We serve as the outsourced environmental team for clients who need expert compliance support without the overhead of in-house staff.
Construction Contractors
General contractors, subcontractors, and construction managers on commercial, industrial, and infrastructure projects.
Oil & Gas Operators
Upstream and midstream operators, drillers, and pipeline companies managing compliance across active and legacy operations.
Industrial Facilities
Manufacturers, processors, and industrial operations managing permits, inspections, and ongoing regulatory obligations.
Government Clients
Public agencies and entities requiring NEPA documentation, compliance programs, remediation oversight, and technical environmental reports.
Property Owners & Developers
Landowners, developers, and lenders navigating due diligence and environmental requirements.
Get started
Need an environmental team without the overhead?
Tell us what you're working on. We'll tell you exactly what it takes to stay compliant — and handle it for you.