Portable potties giant Call-A-Head - whose catch phrase claims "We're No. 1 at picking up No. 2" - is being sued by dozens of ex-employees accusing CEO Charles Howard of flouting state labor laws since 2002.

The workers claim they had to clean up to 100 toilets a day around the metropolitan area. The potties were along routes that took 15 hours to complete, but their pay was capped at 10 hours, according to the class-action lawsuit filed in Brooklyn Federal Court.

"He paid you on the basis of 10 hours a day. If you can get your job done, get it done. If you go over, he doesn't care," said Samuel Milan, 35, a senior pump truck driver who spent six years at the company before being laid off last week.

The federal lawsuit is just the latest stink for the Broad Channel, Queens-based company, which has been hit with multiple environmental violations over the past decade, including a $100,000 fine and $10,000 restitution to the city in 2004 to clear up charges they polluted the wetlands with runoff, court papers show.

The lawsuit demands back wages for every hour of overtime that went unpaid since July 17, 2002