Moncks Corner P.D. dispatches off of the County Municipal Channel. It is 155.5950 with a PL of 186.2.
Jamestown, Bonneau, and St. Stephen P.D. use with channel as well.
The Moncks Corner Units will have the designation of "Kilo" in front of their numbers. (Kilo 1 Kilo 2 and so forth).
Central (dispatch) will use Bonneau, and Jamestown prior to those units and I believe St. Stephen will be Sierra.
Hope this helps