TIVERTON — The 200-member teachers union plans to take its contractual dispute with the School Committee to the workplace of the committee’s chairwoman — St. Anne’s Hospital in Fall River.

The union membership has voted to conduct informational picketing at the hospital on Monday at 2 p.m., according to a notice sent the hospital president by a union official.

In a labor standoff that has become increasingly nasty on a personal level, the School Committee chairwoman, Denise deMedeiros, an emergency room nurse, issued a statement yesterday accusing the teachers union of harassment.

She said that one union official, Patrick Crowley, “specifically intends to disrupt my ability to carry out my work as a nurse at the hospital, and to otherwise disrupt my employment there.”

Patrick Crowley is the deputy executive director of the Rhode Island Education Association, the state affiliate of the local union, NEA-Tiverton.

“It is indeed a sad day for school negotiations in Rhode Island when a teachers union — which ostensibly is made up of professionals dedicated to the service of others — must stoop to tactics such as this.”

Amy Mullen, president of the union, said deMedeiros has been “impacting us where we work, so we thought that we would impact her where she works.”

“We have no intention of disrupting hospital business,” she said.

Crowley, meanwhile, sent a letter late last week to the hospital president, Robert E. Guyon Jr., informing him of the union’s intent to picket on Monday.

Yesterday, he said the letter was sent “out of an abundance of caution” in light of one legal interpretation of precedent-setting cases before the National Labor Relations Board, which indicated that any organization planning to picket a health-care facility must give 10 days’ notice.

He declined further comment except to say that the union membership voted to conduct the informational picketing.

DeMedeiros said, “Mr. Crowley’s tactics, which are obviously designed to undermine my relationship with the hospital and its patients, are inherently destructive to the educational system.”

She also said that Crowley’s “campaign of harassment does nothing to resolve the issues surrounding the contract.

“Instead, he distracts from the negotiations and in the end prolongs them, to the benefit of no one and the detriment of all,” deMedeiros said in the statement.

DeMedeiros said the committee is committed to negotiating a “fair, equitable and fiscally responsible teachers’ contract,” but Mullen scoffed at that assertion.

It is the committee that “won’t sit down and negotiate,” Mullen said.

The informational picketing is intended to put public pressure on the committee to return to the bargaining table, she said.

In October, the committee declared an impasse in mediation and filed for nonbinding arbitration.

It rejected the union’s latest proposal for a two-year contract containing raises of 3.5 percent and 3.75 percent in the first and second years, respectively.

The two sides also cannot agree on health-care costs.

Two months after the committee declared the impasse, no arbitration sessions have been scheduled, an indication of the slow pace of the process, Mullen said.

Meanwhile, teachers are working without a contract under court order.

“Morale is in the toilet,” Mullen said.

gmacris@projo.com