On the Freqofnature.com web site there is this for the Red Cross. So it could be the first two or something else.
VHF - Low Band Operations
Description Frequency
CH 1 RED - Primary (Nationwide) 47.4200
CH 2 BLACK - Secondary 47.5000
CH 3 TAN - Alternate 47.4600
CH 4 YELLOW - Backup 47.6600
CH 5 ORANGE - Tactical 1 47.5400
CH 6 BLUE - Tactical 2 47.6200
CH 7 PURPLE - Tactical 3 47.5800
43.0000
VHF - High Band Operations
Description Frequency
CH 1 PRIMARY 155.1600
CH 2 SECONDARY 155.2200
CH 3 ALTERNATE 155.2800
CH 4 BACKUP 155.3400
CH 5 TACTICAL 155.4000
155.2350
154.5150
154.5700
154.6000
154.6250
UHF - Band Operations
Description Frequency Tone
Orange County (Santiago) 462.5750 192.8
Los Angeles (Mt. Lukens) 462.6750 192.8
Los Angeles (Oat Mt) 463.6750 192.8
Los Angeles (Palos Verdes) 463.5000 192.8
San Gabriel Valley (Johnstone) 463.9750 97.4
San Gabriel Valley Tac 1 464.5000 97.4
San Gabriel Valley Tac 2 464.5500 97.4
San Gabriel Valley Tac 3 463.3375 97.4
San Gabriel Valley Tac 4 463.4125 97.4
San Gabriel Valley Tac 5 463.6375 97.4
Glendale (Mt Thom) 461.2500 162.2
CHANNEL 1 463.4750
CHANNEL 2 464.5500
CHANNEL 3 462.6750
CHANNEL 4 463.0125
CHANNEL 5 463.5000
CHANNEL 6 463.1125
CHANNEL 7 463.1875
461.7875
461.1875
462.3000
463.0875
463.3500
463.4875
464.0625
464.7500