I think Clinton closed the base, and had a small token 'janitor crew' left there, and then the volcano erupted.
Not sure I recall the timing correctly, but the two events were pretty close.
And the Phillipines were upset with us being there.
If the events weren't sequential, they were at least contemporaneous within a few months.
The documentary is a volcano video I picked up cheap not knowing what it really was about and it turned out to be pretty good. The video shows extensive footage of the USGS team on the base and the base being evacuted as the volcano blew. There were soldiers and their families everywhere. A typhoon hit on the heels of the volcano and made a real mess of things with all the ash. I recall that because of the devastation, it was decided to abandon the base. The nearby air or naval base was rebuilt and was abandoned months later when the Phillipines wouldn't renew the contract. I'll have to watch it again, it's been years.