CREATE TABLE table_54770 ("Race" TEXT, "Circuit" TEXT, "Date" TEXT, "Pole position" TEXT, "Fastest lap" TEXT, "Winning driver" TEXT, "Constructor" TEXT, "Tyre" TEXT, "Report" TEXT)

What is the name of the circuit when Phil Hill has the fastest lap?
SELECT "Circuit" FROM table_54770 WHERE "Fastest lap" = 'phil hill'
SELECT "Circuit" FROM "table_54770" WHERE "Fastest lap" = 'phil hill'