The Oakland A’s pitch for a new ballpark next to Laney College got a big thumbs-down from the school’s faculty and students, with representatives of both groups voting “no” on the idea of a 35,000-seat stadium.

“We heard from our members that they are overwhelmingly against the stadium,” said Jennifer Shanoski, president of the Peralta Federation of Teachers Local 1603.

After polling members, the union’s executive counsel voted to oppose the school entering into negotiations with the A’s to lease 13 acres of land owned by the Peralta Community College District. The union represents faculty, counselors and librarians at Laney and the district’s other three schools.

“A baseball park is going to have games happening on many, many days when we have classes,” Shanoski said. “There will be construction, and that will of course be loud and disruptive and it will affect the traffic in the area, which is already a problem.”

Shanoski said the union also shares the concerns of residents in nearby working-class neighborhoods that a ballpark will touch off a wave of gentrification.

“There is the potential for speculators buying up land and displacing both nearby residents and residents of Chinatown, where rents are already sky high,” Shanoski said.

The Associated Students of Laney College also weighed in with a “no” vote. “The night games, the alcohol, the disruption — it would destroy everything that Laney stands for,” said the group’s president, Keith Welch.

As for the money that leasing the land from the Peralta district would bring to Laney, Welch said, “The A’s think money can move anything. Well, it won’t move us.”

A recent poll conducted for the Oakland Chamber of Commerce indicated that city residents back the ballpark proposal by a 2-1 ratio. But at least one City Council member, Noel Gallo, said the students and faculty may have a point about this particular location.

“I was surprised that the A’s chose this site to begin with,” said Gallo, whose district does not include the would-be ballpark spot. “I would like to see them stay at the Coliseum, where the infrastructure is already in place.”

Gallo also noted that Oakland and Alameda County voters have invested millions of dollars in the Laney campus.

“This property may be a challenge to get it approved,” Gallo said.

The Peralta district’s Board of Trustees will begin studying a possible deal next month. Expect the faculty union to be deeply involved in what is likely to be a yearlong process.

“The money and energy going into studying a ballpark could be better used elsewhere,” Shanoski said.

A’s President Dave Kaval declined to comment on the two votes, but said the team is focused “on working with all stakeholders” to come up with a plan that “advances the mission of Peralta colleges.”

Looking down the road, if talks don’t go smoothly, Laney’s faculty and 20,000 students could represent a potent force at City Hall — and at the ballot box.

San Francisco Chronicle columnists Phillip Matier and Andrew Ross appear Sundays, Mondays and Wednesdays. Matier can be seen on the KPIX TV morning and evening news. He can also be heard on KCBS radio Monday through Friday at 7:50 a.m. and 5:50 p.m. Got a tip? Call (415) 777-8815, or email matierandross@ sfchronicle.com. Twitter: @matierandross