I pulled one of the plugs, and yes, these were poured. There was even a little dab of NoAlox, or some anti-sieze lube, on the threads of the plug! The waterline run through the dedicated space for the panelboard is a violation as well.
TG, before the liquid is poured in, a fiber material is driven into the conduit to keep the liquid sealing compound (one mfr. calls their's "Chico") from pouring down the conduit.
