The following is a memo released to CFD personell in August 2004 just before they switched from UHF to Palmetto 800. This is a must read for anyone that monitors CFD. It lists operating procedures, channel usage, signal codes, and even includes radio templates!
http://www.columbiasc.net/fire/Retain_Memos/04010.pdf
http://www.columbiasc.net/fire/Retain_Memos/04010.pdf