Overview
What it is.
Phase III Remediation is the planning and oversight of site cleanup. It picks up where Phase II leaves off. By the time Phase III starts, sampling has confirmed contamination above the applicable screening level, and the question shifts from “is it here” to “how do we close this out.”
SAGE handles Phase III as a project, not a deliverable. Each engagement is scoped against the specific contaminants, the specific regulatory program, and the specific reuse goal for the property.
At a glance
Engagement type, deliverables, scope of work, coverage.
- Engagement type
- Project
- Site-specific scope
- 100%
- Self-performed earthwork
- 0
- States of coverage
- 4
Multi-month to multi-year depending on remedy. Deliverables: remediation plan, regulator correspondence, oversight reports, confirmation sampling, closure package. We oversee licensed contractors; we do not self-perform earthwork, drilling, or treatment. Coverage: Idaho, Northern Utah, Eastern Oregon, Western Montana.
How it works
Every Phase III is different.
A petroleum release at a former gas station looks nothing like chlorinated solvents at a former dry cleaner, which looks nothing like agricultural chemical residue at a rural parcel, which looks nothing like historic heavy metals at a mining-legacy site.
The cleanup options, the regulatory pathway, the timeline, and the cost differ widely. Talking about Phase III in generalities tends to mislead. We’d rather scope the conversation to your actual site.
Scope of work
What we typically do on a Phase III.
Six work streams, sequenced against the data and the regulator.
Remediation planning
Goal-setting against the regulatory framework that governs the site.
Regulator coordination
Voluntary Cleanup Program engagement, Idaho DEQ correspondence, EPA notifications when applicable.
Cleanup-method evaluation
Excavation, in-situ treatment, capping, MNA, soil-vapor extraction, pump-and-treat — each weighed against feasibility and cost.
Contractor scoping & oversight
We don’t self-perform earthmoving or treatment. We scope it, bid it, oversee it, and document it for the regulator.
Site cleanup execution
Coordinated execution of the chosen remedy, with confirmation sampling at completion.
Closure documentation
Final report packaging that supports a regulatory closure letter or no-further-action determination.
Who needs Phase III
Four scenarios where Phase III is the work in front of you.
Owners with confirmed releases
Anyone whose Phase II or regulatory inspection confirmed contamination above the screening level.
Buyers acquiring contaminated sites
Buyers who want to acquire a property with known contamination on a path to documented closure.
Lenders requiring a path to closure
Lenders who will only finance the property if a Phase III plan and schedule are in place.
Brownfield redevelopers
Developers turning historically used land into commercial, multifamily, or mixed-use product.
How we engage
Start with the data and the regulatory pathway.
Send us the Phase II report, any prior regulatory correspondence, and what you want the property to be when it’s done. We’ll lay out a Phase III scope that matches your contaminants, your regulatory program, and your reuse goal.
Related
Before Phase III.
Have a confirmed release on a property?
Send the Phase II and any regulator correspondence. We’ll come back with a Phase III pathway built around your specific site and your reuse goal.