I have been trying to help you guys in tracking the owner to this talkgroup down. After this thread first appeared on the board, I programed it into a special bank that contains OHP, RMA, TAA, TCC & select others. Last week, I finally heard my first traffic on this TG. Something like 846 to 849. This was repeated twice. Because OHP has radio identifiers in this number range, I didn't think anything about it the first time. After the second time, I looked at my scanner and noticed the TG was 57840. The next day before work while I was scanning an unlocked bank looking for new TG's, I heard a conversation with similar sounding identifiers. The TG was 40144, which lists to Tulsa Public Works 3-G, Security & Administration. Over the next several days the radio traffic talked of parks, water towers, and other public assets. At around 03:00 on Thursday morning I heard one unit say to another to switch to "E". Shortly after that TG 57840 went active with a conversation about a salad. I think that TG 57840 is Tulsa Public Works 3-E and that it is used as a secondary channel for Security & Administration. I haven't found any listings for a Tulsa Public Works 3-E TG in any of my "Police Call"s or any other resource, including this site's superior database. Can you guys confirm my theory?