Lee Zeldin, the E.P.A. administrator, revived a plan created during the first Trump administration to end the testing of ...

Using dry nitrogen to pressure test a system is a very effective method of verifying a system is leak-free. In fact, I believe it is more reliable than using a standing vacuum test typically performed ...

Forbes contributors publish independent expert analyses and insights. Mark C. Perna is a generational expert who covers education & careers. Every year, teachers and students across America brace for ...