Friday, October 9, 2009
Carlisle School building project surveying, drilling to commence
At its October 1 meeting, the Carlisle School Building Committee (SBC) voted to recommend hiring Hager-Richter Geoscience, Inc. and McPhail Associates Inc. to begin work on the Carlisle School campus as part of the school building project.
Hager-Richter Geoscience, Inc. will perform an underground survey of buried utilities including water, electrical, gas, telecommunications, fire alarm and sewer lines under the school plaza in front of the Wilkins, Spalding and Corey Buildings. The proposal states they will use methods such as electromagnetic induction metal detection to detect metallic utilities; ground-penetrating radar to detect metallic and non-metallic utilities; and precision utility location transmitter (PUL), which detects underground signals sent through above-ground utilities, such as an electrical panel. PUL also detects live electric lines.
The company’s cost, at $5,390, was the most expensive of the three quotes (the other two were $1,050 and $3,650). However, the committee determined that Hager-Richter offered the most complete surveying techniques.
The three proposals for the core-sample drilling came in under $17,000, well under the budgeted amount of $20,000. The committee chose McPhail Associates, Inc. at $14,500. McPhail will be drilling six bore holes and digging two pits to test the condition of the soil under the plaza. The holes will be dug on the site of the proposed building and at the locations for the underground water tank and new utility lines. Building and Grounds Supervisor David Flannery said no oil tanks would be found. He said the school has a certificate showing the 1987 removal of two underground oil tanks. “They were removed and safely disposed of,” he said.
Concerns about work
during school day
Carlisle’s Owners Project Manager (OPM) Sean Fennell said the surveying work may take one or two days, while the core samples will probably be done in one day. The committee proposed the work be done on an early release day in October, which is followed by a professional day. “Will the pits be filled in after the core samples are done?” asked SBC member Wendell Sykes. Fennell said filling in all bore holes and test pits is part of the work.
Superintendent Marie Doyle asked if there will be noise during the work. “Yes,” said Fennell. An excavator will be used, with digging and engines running, he explained. “But not a jack hammer,” added SBC Chair Lee Storrs. Doyle said that teachers would be meeting in the Wilkins Library and expressed concern that the noise would be disruptive. “If a gas main is hit, do we evacuate the campus?” she asked. “If the electricity is cut, how long will it be out? I have to think about that.”
Flannery said the Fire Department would respond if the gas or electric were cut, and it would probably take 24 hours to restore service to the school. “I’m most concerned about the water, heat, fire alarms, and telephone lines,” he said. “We don’t know exactly where they are.” Fennell said he would be on site during the work to supervise. “We’re taking all the precautions we can reasonably take,” added Fennell. He said he will also contact Dig Safe. ∆
© 2009 The