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<br />On page 4 of the application reference is made <br />to Exhibit C that states the gravel thickness <br />varies bei:ween 2 and 14 feet with an average <br />of 7 feet. In this instance the 2 feet of <br />gravel can be considered minimum and 14 feet a <br />maximum. The mining operation has been <br />designed i.o recover the maximum economic <br />amounts of gravel. The areas selected for <br />mining generally have greater than 5 feet of <br />gravel and may be as deep as 14 feet. the <br />mining of the gravel material will then, in <br />general, lower the lands surface an average 10 <br />feet. <br />~',. The ~:,pr._~ra~t:or~~ s'hinul~i provide seine data t~_i ~usiify missing of <br />r`-1 ,, B., I; topsoil horizons. Such dett,_t ~h nuld include <br />c:ompz.ri.=_ons in ,ivai.lable IU, 1='„ F' pl-I, _.nt..i ^rdanie matter-. <br />Rule 1.1(78) "Topsoil <br />the surface of the eai <br />modified and acted upon <br />and biological agents <br />rooted plants necessary <br />goals." <br />means the material at <br />~th which has been sa <br />by physical, chemical, <br />that it will support <br />to achieve reclamation <br />From this definition, it would appear that the <br />plant-growth medium tieing proposed for salvage <br />and reclamation purposes i>a favorably within <br />rule 1.1(28). There has oat been a proposal <br />to mix the C horizon. The C horizon never has <br />been considered "topsoil" within soil science. <br />On page `_"r of the Permit application it is <br />stated: "approximately 7 inches of topsail <br />soil and 13 inches of subsoil will 6e <br />combined..." This statement is directly <br />applicable to Exhibit I in which the two soils <br />to be removed are from the SOV mapping unit. <br />Please note that the A horizon (true topsoil) <br />is described as being 7 inches thick in both <br />the Veldkatmp and Nederland soils, which are <br />the two major constituents of the 50V mapping <br />unit. Further, please note that the H <br />horizons are 13 inches thick and 18 inches in <br />the Veldkamp and Nederland, respectfully. <br />Basically, the C horizon is the material to be <br />mined. The pH values for the two soils are <br />between 6.5 and 7.5 for both the A and B <br />horizons. Organic matter content generally <br />does not erxceed 3.5 to 4 percent in either A <br />horizon of the two soils and generally is not <br />greater than 1.75 to 2.5 percent in the sub- <br />soils (B horizons). <br />2 <br />& Environmental Servi <br />