…in spite of the fact that the well-pounded spots probably don’t have much gold left, I see all too many prospectors hike down to a creek or other spot at the first place the road comes near it just because it’s the easiest access point.

If Epd is larger, then the compressor will be spinning faster than the manufacturer’s maximum specified RPM and might destroy itself. If this happens, then the compressor again might not produce enough air to support a diver. Neither is a desired outcome.