Section 704. Proof of rock cover.
(a) Requirement.--Proof of the existence of 35 feet of rock cover must accompany any plan submitted under this chapter.
(b) Sufficiency.--Proof of rock cover is to be ascertained by testing holes drilled on:
(1) intersecting lines forming rectangles or squares where the cover thickness is less than 50 feet; and
(2) on spacing of not more than 35-foot centers.