go to "Database" for whatever county you are in and scroll down to the business tab, bottom right. Click and scroll down to "utilities" CL&P freqs are listed there. (at least for Fairfield County)
Middlefield Police Department consists of two full time constables under a Resident State Trooper.
You can try 37.08 but since they are under the CSP via Resident Troopers, they are likely on the CSP trunked system.