Two major events in the summer of 2007 swiftly changed the focus of Forest Septic Tank Service in Des Moines, Iowa, a small, old-line traditional pumping company with two trucks and two drivers.In July, the City of Des Moines passed the “25 percent rule,’’ requiring businesses that do commercial and institutional cooking to clean their grease traps and interceptors when they were one-quarter full. Forest Septic’s grease trap pumping exploded from 10 to 70 percent of the workload, requiring two new trucks and drivers running full time to answer the demand.Also that summer, without warning, local Polk County authorities ended
