A zero reading is first established (follow the procedures outlined in Section 2.1.1). The filter stone is saturated (follow the procedures in Section 2.6). Make a mark on the cable which will lie opposite the top of the standpipe, (well),
when thepiezometer has reached the desireddepth. (The piezo diaphragm lies ¾ inch above the tip of the piezo).
lies
tip