Beeping...

There is a beeping noise that has been going on ALL NIGHT LONG!  We even walked around last night to find out where it was coming from.  It is almost like morse code!  Three long beeps followed by a pause (--- --- ---).  It is seriously driving us both crazy and now the parking people are power washing the garage.  So we have the sound of that motor and sprayer and --- --- ---.  Oh the joys of urban living!  Ugh.