Dead by Morning

From Introduction: While digging a new pool for the Traumaville Family Campground, construction workers accidentally discover a secret government chemical dump by puncturing a barrel of nauseous green gas with a bulldozer. The gas made all of the construction workers sick and they immediately went home to rest and recuperate. Being Friday, they left the phone calls to officials for Monday's work in the hope that everything would blow over by then anyway. Meanwhile, the gas has seeped into the neighboring graveyard bringing flesh-eating zombies to life...