CECS — Environmental Remediation
You can't price a mess you haven't measured. In environmental remediation the scope is discovered, not designed — a hidden plume of contamination whose extent only sampling reveals. Maturity rides on site characterization, with a discovery risk that never fully disappears. Built on AACE 107R-19.
What this standard adds
Same five-class logic as Lesson 1, but with a distinctive driver: the scope is a discovery. In most projects you define what to build; in remediation you first have to discover what's there. This shares a flavor with mining (the subsurface is the unknown), but here the "resource" is contamination you're paying to remove, not ore you're paid to extract.
Why environmental remediation is distinctive
- Scope is discovered, not designed — The contamination's extent and volume must be investigated; they aren't a design choice but a field finding.
- Technology selection matters — Dig-and-haul, in-situ treatment, pump-and-treat, capping — the chosen remedy hugely changes cost and is itself a maturity step.
- Regulatory endpoint defines "done" — Cleanup targets and the regulator's acceptance criteria set how far you must go — a moving, negotiated boundary.
- High discovery risk — Unexpected hotspots, deeper plumes, or new contaminants routinely emerge during work — driving large contingency early.
Characterization mapped to classes
Remediation maturity climbs with site investigation and remedy selection (general pattern; the RP gives the authoritative matrix):
| Class | Characterization / remedy definition | Typical method |
|---|---|---|
| 5 | Suspected contamination, no sampling | Analogy / unit-area parametric |
| 4 | Preliminary investigation, remedy options | Volume estimate × rate, big contingency |
| 3 | Plume characterized, remedy selected | Volume × unit rate, defined remedy |
| 2 | Remedial design advanced | Detailed quantities |
| 1 | Tender-level design, endpoints agreed | Full takeoff |
Putting it to work
For a remediation estimator, the class reflects how well the contamination is characterized and the remedy and regulatory endpoint defined. Tie the class to the level of site investigation, carry generous contingency for discovery risk, and revisit the estimate as sampling reveals the true extent — because in this industry, the scope itself keeps coming into focus as work proceeds.
Nine things to remember
- 107R-19 applies the five-class system to remediation — anchored to site characterization.
- Scope is discovered, not designed — the contamination must be investigated.
- Characterization is the maturity driver — sampling maps the plume that sets volume.
- Technology selection matters — the chosen remedy hugely changes cost.
- The regulatory endpoint defines "done" — cleanup targets set how far you go.
- Cost is volume × unit rate × surprises — each firms up at a different stage.
- Discovery risk never fully disappears — carry extra contingency even at Class 2–3.
- Revisit the estimate as sampling proceeds — scope keeps coming into focus.
- One framework, many dialects — remediation defines scope by discovery.
Glossary
- Cleanup target / endpoint
- The regulator-set level defining completion.
- Discovery risk
- The chance of finding more than expected during work.
- Estimate class
- Maturity level (5 roughest to 1 most definitive).
- Monitoring well
- A sampling point used to map contamination.
- Plume
- The spread of contamination through soil or groundwater.
- Remediation
- Cleaning up contaminated soil, groundwater, or sediment.
- Remedy / technology
- The chosen cleanup method (dig-haul, in-situ, etc.).
- Site characterization
- Investigating the contamination's type, extent, and volume.