A city Sanitation worker was arrested yesterday on charges of having a stockpile of illegal weapons stashed inside his Staten Island home, The Post has learned.

Cops raided the Tottenville residence of Anthony Castelle, 42, and discovered a loaded .38-caliber revolver, two rifles and two 20-gauge shotguns, according to sources.

Also found in the Lee Avenue home were two blackjacks and a switchblade, the sources added. Castelle was charged with weapons possession.