This opportunity is an 8(a) Multiple Award Task Order Contract (MATOC) for Basic Environmental Support Services IV (BESS IV), with competition restricted to a pre-qualified pool of four incumbent contractors. The restriction is justified because only these contractors possess active security badging, approved Health and Safety Plans, and are currently mobilized on-site, preventing a catastrophic lapse in mandatory environmental compliance services. A Sources Sought Notice posted on July 1, 2026, received no responses from capable vendors outside the current pool. No budget amount is specified in the description. The location for performance of services is not mentioned.