9.  (Gain) Loss from Divestitures, Asset Impairments and Unusual Items, Net

(Gain) loss from divestitures, asset impairments and unusual items, net for the three months ended June 30, 2026 was not material. (Gain) loss from divestitures, asset impairments and unusual items, net for the six months ended June 30, 2026 primarily relates to a $34 million gain on a business divestiture in our West Tier, offset by immaterial charges related to legal and remediation liabilities.

(Gain) loss from divestitures, asset impairments and unusual items, net for the three and six months ended June 30, 2025, primarily relates to a $16 million goodwill impairment charge to a business engaged in oil recovery and sludge processing services. This charge is reflected in Other Ancillary within our Collection and Disposal business.