A. An excavation authorized by a building permit;

B. Excavation and backfill for the installation of underground utilities by public utilities;

C. Public cemetery graves;

D. Mining, quarrying, excavating, processing, stockpiling of rock, sand, gravel, aggregate or clay for an established active use and provided for by law;

E. Exploratory excavations under the direction of soil engineers or engineering geologists; provided, that all excavations are properly backfilled;

F. Archaeological explorations conducted under State permit;

G. Excavations for wells and tunnels authorized by a permit;

H. Residential gardens or landscaping on grades less than twenty percent (20%) and less than fifty (50) cubic feet combined cut and fill.