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SOILS INFORMATION (not changed) <br />is clear that the actual salvage depth is defined by the presence of increasing alkalinity in the soil. <br />That characteristic is hazd to identify by itself without a pH meter and frequent soil testing. But a <br />good indicator that the higher alkaline subsoils have been reached is the presence of soft masses of <br />calcium carbonate which would be whitish globs in the soil. Typically this increase in calcium <br />carbonate occurs rather abruptly. Therefore when salvaging the soil, if these soft, whitish globs are <br />encountered salvage of topsoil should not go any deeper. The rest of soil horizon however can also <br />be saved separate from the topsoil and effectively used as backtill. <br />The Nunn clay loam soil is very easy to identify as it does not support trees and the soil has <br />very little rock contained in it. This is an excellent soil and as much of it as possible should be <br />saved. The diagram indicates that the maximum safe salvage depth is about 24". However, salvage <br />to as deep as 36" would not be out of the question provided those deeper soils do not contain too <br />much calcium carbonate. Like the Curecanti Variant, carbonate masses typically begin to appear <br />below about 24" in depth and that indicates increasing alkalinity in the soil. The soil below about <br />36" should not be saved as topsoil as it is alkaline and would cause problems in revegetation. So, in <br />summary, for the Nunn clay loam, salvage to 24" should be safe almost everywhere, and where the <br />calcium carbonate is not present or present in very low amounts below that depth, salvage can <br />occur to as much as 36". <br />The typical Roygorge soil is very thin and intensely rocky. It is unlikely that much soil can <br />be saved from areas occupied by this soil. At best, salvage to about 6" is all that is typically <br />possible, but even that would contain mostly rock. It is probably not worth spending much effort <br />salvaging soil from locations occupied by this series as what would be acquired would not be of <br />much value. However, the soil survey information indicates that within areas occupied by this soil <br />there can be pockets of deep, good quality soil. That soil is probably a lot like the Curecanti <br />Variant, but would not occupy large areas. Therefore, if a deep pocket of soil is encountered in an <br />area occupied by the Roygorge series that soil should be saved following the same criteria used for <br />the Curecanti Variant. <br />Where previous mining and disturbance occurred, there are no natural soils left. However, <br />various stockpiles scattered about the site contain soil materials that can be used. These piles should <br />be saved and used for reclamation as some of these soils are derived from the Nunn clay loam. <br />No changes in this exhibit were necessary for Amendment 1. <br />Table Mountain Quarry -Castle Concrete Company Exhibit 1 (Amendment 1) Page 2 <br />