Mealey's (June 18, 2015, 9:52 AM EDT) -- NEW ORLEANS — One of the oil and gas exploration companies sued by Louisiana residents who allege that they contaminated drinking water on Feb. 18 filed an answer to the claim, arguing that most of the claims against it have already been dismissed (Catherine P. Alford, et al. v. Chevron USA Inc., et al., No. 13-5457 [consolidated], E.D. La.)....