In all well installations, if rapid loss of grout material occurs
during placement, clean, coarse fill material (e.g., sand, gravel,
crushed stone, or chunk bentonite) may be used in the zone(s) in which
the rapid loss is occurring. The remainder of the annular space shall
be grouted as provided below. In no case shall pouring, dumping, or
shoveling of grout material into the annular space be deemed an approved
method of grout placement.