Drilling additional small (1/2") holes above the level of the 4 inch holes accomplishes nothing.
Drilling additional small (1/2") holes below the level of the 4 inch holes will allow desaturation of the soil below the level of the drain pipes but only for a few feet radius around the pit. This is optional. A slight hazard exists that mud may enter the pit through these additional holes.
States can help recovery from hurricanes and tornadoes by not requiring due digence or prompt and timely correction of substandard conditions, and by providing continued liability insurance where companies drop homeowners.