Water in a multi-story building is leaking down the supply pressure pipe into the basement after the supply pressure shut-off valve is closed and the water stops leaking, the remaining gage pressure above the valve show 67 PSI. How high above the gage is the leak?

Water in a multi-story building is leaking down the supply pressure pipe into the basement after the supply pressure shut-off valve is closed and the water stops leaking, the remaining gage pressure above the valve show 67 PSI. How high above the gage is the leak?