Mealey's (June 18, 2015, 11:18 AM EDT) -- LOS ANGELES — An environmental group on June 3 filed a lawsuit in California federal court against a group of hydraulic fracturing companies and the governor of California, contending that they are liable under federal law for using mail and electronic wire services to threaten former employees into violating federal drinking water laws and to conspire against farmers who were petitioning California federal courts for relief from water contamination (Committee to Protect Our Agriculture Water v. Occidental Oil & Gas Corporation, et al., No. 15-04149, C.D. Calif.)....