12. If a firing or the firing of a new load misfires, the geophysical survey licensee shall abandon the shot holes in the following manner:(1) fill the shot hole up to the surface of the firing hole with materials from the firing hole or materials of the same type as those from the firing hole;
(2) when the firing of a new load misfires, put a firing hole plug at a depth of 30 cm below the surface of the soil;
(3) level excess materials from the firing hole or materials of the same type.