The Tokyo Olympic standard is 15:10.00.
Canadian teammate Julie-Anne Staehli, who'd dipped under the Olympic standard a week earlier, finished sixth in a personal best 15:01.85.
Mohammed Ahmed of Hamilton, Ont., won the men's 5,000 is 13:18.49, rebounding from the 1,500 earlier in the day, from which he dropped out before finishing.
With COVID-19 restrictions in Canada, numerous Canadians are in the U.S. either trying to achieve Olympic standards or fine-tuning before Tokyo.
Van Buskirk, who hadn't raced in more than a year due to injuries, had been training in Flagstaff, Ariz., before flying to L.A.
This report by The Canadian Press was first published May 16, 2021.