I think Will Robinson (ex-space explorer??) nailed it, WAPA power line inspectors. 616 final tx before going off duty said he would be working Oracle tomorrow.
Mystery solved. One final note about DOE, The NEST team was doing a training exercise in San Diego somewhere around 20 some years ago, and had a portable comms unit set up. They used 173.000 (A1) simplex 171.950 (A3, called "TEAMS" channel, simplex), and then a portable repeater on 171.200 with a 172.450 input. That was a long time ago, but if you plug 'em in, you never know what you might hear.
Thanks for all the input!