![Baby Steps](https://cole-pumper.imgix.net/https%3A%2F%2Fwww.pumper.com%2Fuploads%2Fimages%2Fimg_0079324.jpg?crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=620&ixlib=php-1.1.0&q=75&w=1024&s=a7b8c6fb469af49de0b7a83e2f34dff2)
Fortified by the belief that if you can change a baby's diaper, you can clean portable restrooms, Kathy O'Brien of Nunda, N.Y., came into the industry with no experience. Her husband, Sean, a welding shop supervisor, pumped septic tanks on evenings and weekends.
A mutual...