Thompson swam the 500-yard freestyle in 4 minutes, 35.11 seconds, beating the Tracy High record of 4:44.89 set by Chris Tarrant in 1982.
He followed it up with a fourth-place finish (4:38.75) in the championship race Saturday, May 11.
Thompson holds four varsity boys records at Tracy High, including a new record in the 50 freestyle (21.98) that he set in the first leg of the 200 freestyle relay Friday, beating the school record he set last year in the 50 freestyle (22.40).
He also finished first in the varsity boys 100 butterfly consolation race Saturday (52.03), a half-second shy of the school record (51.52) set in 1985 by Richard Giambastini.
Kimball High senior Michaela Loomis also set two varsity school records at the section meet.
She finished fourth in the 100 breaststroke championship race (1:04.25), beating her own record from 2012 (1:04.29).
Her second-place finish in the 100 butterfly consolation race (58.39) also improved on the record she set last year (59.06).
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