user: ### NOW ANSWER:
Question: In California what was the total rank at Irvine Station when the number of boarding and deboardings was less than 683626?
Columns: ['Rank', 'Station', 'City', 'State', 'Boardings and deboardings']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Penn Station', 'New York City', 'New York', 8995551.0]
SQL:

assistant: SELECT SUM("Rank") FROM "Table" WHERE "Boardings and deboardings" < 683626.0 AND "State" = 'California' AND "Station" = 'Irvine Station';