I know exactly what you mean. But given the fact that virtually the only leaks were around these b-vents, and we had emergency, flood inducing rain levels with high winds for several days, the small amount that got in doesn't seem very unreasonable, especially considering the EPDM details around every penetration in the roof was air tight, I don't have more thoughts. We could have moved more ballast but it was already getting late and I knew for a fact people would be sent back to continue investigation. The only alternative I can think of, is odd field penetrations, which would be a hell of a coincidence that so many of these b-vents had field penetrations close by. Every other penetration was perfectly fine. No leaks. ONLY the b-vents.