7 Pa. Code § 108.17 – ENV.

(a) Label requirement. The label shall set forth the minimum ENV of the agricultural liming material that is the subject of the label.
(b) Calculation of ENV. ENV shall be calculated using the following formula: (% by weight passing 20 mesh sieve—% passing 60 mesh sieve) x 0.4 = (a) (% by weight passing 60 mesh sieve—% passing 100 mesh sieve) x 0.8 = (b) (% by weight passing 100 mesh sieve) x 1.0 = (c) [(a + b + c) x Calcium Carbonate Equivalent (CCE)] divided by 100 = ENV

The provisions of this § 108.17 adopted March 4, 1994, effective March 5, 1994, 24 Pa.B. 1179.

This section cited in 7 Pa. Code § 108.19 (relating to guaranteed dry weight analysis).