CONCORD — The state’s public health chief hopes the state lab building where infectious diseases are monitored and tested will be ready to open on Monday, after it was damaged when pipes burst over the weekend.

Public Health Director Jose Montero said that final tests on the Public Health Lab’s water system will be conducted today to determine if the lab can reopen. If the tests are successful, staff will then start checking the status of sensitive laboratory equipment, with the intention of reopening the lab on Monday.

Montero insisted that there was no danger to the public due to the damage to the lab, where technicians test potentially virulent flu strains, rabies and other bacteria and viruses.

“When we realized what had happened on Monday, the first thing we did was make sure any biohazards were safe and secure, that there was no risk of release or explosion,” he said.

Montero said it’s too early to provide an estimate for how much equipment will have to be replaced or how much it will cost. “This is a tremendous investment for the state,” Montero said of the lab equipment.

Most of the 800 people who work at the facility at 29 Hazen Drive were able to return on Wednesday. The building also houses offices of the Department of Information Technology and the Department of Environmental Services, as well as the Department of Public Health and Human Services. The lab incurred the most damage from the burst pipes.

The Administrative Services commissioner said a sensor had detected a problem with the heating system in the building when temperatures plunged close to zero over the weekend, but dialed the wrong number to alert the maintenance department.