A few weeks ago I asked about anyone hearing any traffic on some of the known Treasury channels. I've been working in Los Angeles for the last week or so, and found some significant activity on a common Treasury Department frequency.
165.9500 MHz, N009 was busy for several days this past week with some sort of surveillance operation. I got the feeling that there is another P-25 repeater on this frequency that I was not picking up well enough to decode. The repeater I was hearing well appears to be covering the downtown LA area. I was not able to confirm the input of 167.0000 MHz yet.
In addition to this frequency, I've found several VHF P-25 repeaters that may or may not be related, and will be posting those soon.