NEW : Alaska EPA says the state is looking for signs of environmental damage . Mehler said the Kulluk had about 143,000 gallons of diesel fuel and 12,000 gallons of combined lube oil and hydraulic fluid on board . The offshore drilling barge currently shows no sign of leaking fuel , the Coast Guard says . A tug had to set the rig free during a severe storm Monday . The rig 's crew of four evacuated on Saturday .
NEW : Alaska EPA says the state is looking for signs of environmental damage . The offshore drilling barge currently shows no sign of leaking fuel , the Coast Guard says . A tug had to set the rig free during a severe storm Monday . The rig 's crew of four evacuated on Saturday .