No person, firm or corporation shall strip, excavate or otherwise remove
topsoil, for sale or for use other than on the premises from which the same
shall be taken, except as specifically required by the construction or alteration
of a building on such premises and excavation or grading incidental thereto.
There may be permitted, with the written approval of the Zoning Board
of Appeals as provided for in this chapter, the excavation and sale of sand,
gravel, clay, shale or other natural mineral deposit (except topsoil) or the
quarrying of any kind for rock formation, subject to the following conditions:
A. In the case of any open excavation there shall be a substantial
fence with suitable gates completely enclosing the portion of the property
in which the excavation is located, and such fence shall be located at all
points 40 feet or more distant from the edge of such excavation.
B. The slope of the material in such sand, gravel or other
pit shall not exceed the normal angle of repose of such material, and the
plane of such angle or repose shall not come nearer than 40 feet to any property
line.
C. In the case of a quarry or other excavation in rock,
there shall be a substantial fence, with suitable gates, at all points distant
40 feet or more from the face of any quarry walls.
D. No rock crusher, cement plant or other crushing, grinding,
polishing or cutting machinery or other physical or chemical process for treating
the product of such quarry shall be permitted.
E. No such quarry wall shall be nearer than 40 feet to any
property boundary line or street line.
F. The product of such quarry shall be removed
in the form in which it is quarried.