Ok, on to Round 2. I've abandoned the idea of using a combination waste and vent design (even though I'm under IPC, which seems much laxer than the UPC on this subject). To further simplify the DWV, I have Hand Sink #1 draining indirectly into Floor Sink #1, and Hand Sink #2 draining indirectly into the Mop Sink. That is why they are no longer pictured here.
But I'm stymied by the mop sink, which is floor-mounted on the concrete slab. The only place I can see getting a dry vent to its drain pipe is from the wall behind it, but that would require a (short) horizontal vent section under the slab. The only other possibility I can think of is to connect Hand Sink #2 (not pictured, but just to the side of the mop sink) directly to a drain pipe, running the vent for the hand sink in the wall, and then connecting the Mop Sink drain to the hand sink drain, thus making the hand sink drain into a wet vent.
Advice and recommendations, please!
But I'm stymied by the mop sink, which is floor-mounted on the concrete slab. The only place I can see getting a dry vent to its drain pipe is from the wall behind it, but that would require a (short) horizontal vent section under the slab. The only other possibility I can think of is to connect Hand Sink #2 (not pictured, but just to the side of the mop sink) directly to a drain pipe, running the vent for the hand sink in the wall, and then connecting the Mop Sink drain to the hand sink drain, thus making the hand sink drain into a wet vent.
Advice and recommendations, please!