Standards & guidance · Defined
ASTM E2600 — Vapor encroachment screening
An ASTM guide for screening vapor encroachment concerns at property involved in a real estate transaction.
Standards references reviewed September 15, 2026. These summaries explain purpose, not the full standard. Confirm the edition required by your contract, program, and jurisdiction; publication of a newer edition does not automatically change local requirements.
Why it matters
Screening subsurface vapor conditions is different from establishing vapor intrusion into occupied space. Identify the screening approach and any additional investigation recommended.
In practice
A project example
A screening identifies a nearby source that warrants further evaluation rather than declaring indoor air impacted.
Technical references
General educational guidance from KOW Building Consultants. Examples are illustrative, not project records. The applicable contract, standard, program, and jurisdiction control the requirements for a specific assignment.