PLEASANTON — A 34-year-old man handing out business cards at the Alameda County Fair, reportedly to solicit women into the porn industry, was arrested by Alameda County sheriff’s deputies after allegedly making his pitch to a teenage girl over the weekend.

Deputies arrested Aaron Gimbert, of Pleasanton, on Sunday afternoon on suspicion of trying to use misrepresentation to solicit a person into a life of prostitution, sheriff’s spokesman Sgt. J.D. Nelson said. They arrested him around 3:30 p.m.

Undercover deputies from the agency’s sexual assault unit watched Gimbert hand out a business card with the words”Big Pimpin Inc.,” and images of at least two topless women.

Nelson said the Sheriff’s Office learned that Gimbert distributed a card to at least one teenage girl on Saturday, then observed him do the same on Sunday.

“We’ve had nearly a half million people at the fair this year with few problems at all,” Nelson said. “It’s a shame that one moron pulls this stunt on the last day.”

The card also tells its recipient to “(be a star). $1,000 sign-on bonus for 18th B-Day Contract.” A phone call to the number Monday morning reached a voice mail recording.

Gimbert was taken to Santa Rita Jail in Dublin where he was being held in lieu of $50,000 bail. He is due to be arraigned in court on Tuesday afternoon.

The arrest upset some at the fair, which is a popular attraction for families with small children.

“It’s awful and disgusting,” said Christopher Wise, 28, of Stockton, who had spent Saturday at the fair with extended family. He said his aunt received a card while standing with her 4-year-old daughter.

“It’s plenty offensive what he did,” Wise said. “I’m upset, my family’s upset, that somebody would pick this place to do something like this. It’s not something that should be taken lightly.”

According to Nelson, Gimbert was a contracted employee for one of the companies that ran a game at the fair. He was not an employee of the fair or the carnival, Nelson said.

Staff writer Kristin J. Bender contributed to this report. Contact Rick Hurd at 925-945-4789 and follow him at Twitter.com/3rderh.