Two senators charged that federal environmental officials were "asleep at the wheel" in failing to warn of potential toxic hazards posed by gas pipelines from Texas to New Jersey. Sen. John B. Breaux (D-La.) and Sen. Frank R. Lautenberg (D-N.J.) lodged their criticisms as a federal Environmental Protection Agency chief acknowledged delays in warnings about the pipelines operated by Texas Eastern Gas Pipeline Corp. The company has reported pouring lubricant liquids laden with hazardous waste into about 100 pits in at least 10 states along the pipelines, according to the EPA. Agency officials have admitted the EPA knew about potential pollution since 1985.