CREATE TABLE table_30349 ("Season" TEXT, "Games" FLOAT, "Won" FLOAT, "Lost" FLOAT, "Tied" FLOAT, "Points" FLOAT, "Goals for" FLOAT, "Goals against" FLOAT, "Standing" TEXT, "Head coaches" TEXT)

What sesaon(s) did they have 254 goals against?
SELECT "Season" FROM table_30349 WHERE "Goals against" = '254'
SELECT "Season" FROM "table_30349" WHERE "Goals against" = '254'