I want to say it ends very early thursday morning EST. away from my pc currently. still got a few days and it only takes an hour or two to collect the salvage if you are in one of the persistent salvage zones.
The CG ended yesterday, without reaching Tier 3. It had some interesting concepts, but the need to re-enter persistent debris fields was immersion-breaking. Wreckage Component spawn should have been slower/delayed... or capped at 10-20 canisters per field.