The Conservation Commission on Tuesday approved a certificate of compliance for Revvity, a life sciences company located at 68 Elm Street, with a 6-0 vote.

Engineer Mark Beaudry spoke on behalf of the applicant. He explained at the June 17 meeting that Revvity is planning to renovate both of its buildings, with more significant changes to be made to the lab building.

At this meeting, Beaudry explained that the original certificate of compliance request was made in 2014 by PerkinElmer, the previous company, for the warehouse addition at 5 Parkwood Drive and the office at 68 Elm Street.

“Unfortunately, that kind of fell through the cracks,” he explained. “We were all a little surprised when it surfaced again a couple of months ago when we were going through this process.”

Beaudry responded to comments made by Don MacAdam, the conservation administrator at that time, first. Then he spoke about feedback received recently from wetlands consultant Joe Orzell.

MacAdam had stated that landscape debris at the end of Atwood Drive had encroached into the buffer zone. Beaudry said it has been removed, even though he believed it was unclear if the debris came from Revvity’s property. Also, MacAdam had pointed out some grading that he believed occurred at 68 Elm Street for tree planting, which Beaudry confirmed. Landscape debris was removed there as well.

A “small debris pile” near the basin at 5 Parkwood Drive was cleaned up after Beaudry received Orzell’s comments. It was near the tree line and 60 feet from the wetland area.

During the meeting, Orzell said plastic irrigation hosing had been ”dumped close to the edge of the wetland.” Beaudry said it would be removed.

A stone pad between a shed near an infiltration basin and the wetland area appeared to be “freshened up” recently in order for a truck to reach a nearby well. Chair Melissa Recos said the plans didn’t show the gravel area and whether it extended into the wetlands. Beaudry confirmed that the stone does reach into the wetlands..

The amount of stone there was a concern for vice chair Ted Barker-Hook. He urged that the “refreshed stone” be pulled back from the wetland. He added that the well could be accessed by going over the ferns in front of it rather than having a situation of “stone creep” by accessing the well from the back. Beaudry agreed.

Conservation administrator Judy Day said she would work with Beaudry on this as well as the management of invasive species on the site.

Boardwalk projects at Berry Acres OK’d

The Trails Committee’s exemption request was approved with a 6-0 vote in support of construction of four proposed boardwalks at Berry Acres Trail near West Main Street. Also, a deteriorating footbridge there will be replaced. The site is across from The Communities at Golden Pond.

Day noted that Chuck Dauchy submitted the request on behalf of the Trails Committee. The director of the Hopkinton Area Land Trust (HALT) described the projects to her during a recent site walk. The boardwalks will help with flooding that she believed was caused by beaver activity. She noted that aquatic vegetation was spotted on the trail.

The boardwalks are 32 feet, 120 feet, 60 feet and 62 feet in length with a 9-foot footbridge, respectively. The footbridge that will be replaced is 16 feet long. A picture of it showed substantial damage.

Recos said the proposal was similar to past plans submitted by Dauchy and saw no issues with it.

UniBank/Starbucks parking lot hearing continued

The hearing on a request to add four spaces to the cramped UniBank/Starbucks parking lot at 85-89 West Main Street was continued until the next meeting on July 22 at the request of the applicant.