In 1969, John E. Call established John’s Septic Tank Service in Aberdeen, Md., with little more than a 1957 Dodge 1 1/2-ton truck equipped with a homemade, 1,000-gallon steel tank — and enough integrity and old-fashioned work ethic to fill it many times over.“To pump out septic tanks, he’d hook up a hose to the engine intake manifold,” says his son, John R. “Honest John” Call, who now owns the business with his wife, Gloria. “It took about 10 minutes to build up enough vacuum to pump out the tank. Sometimes the ball float that cut off the vacuum when
