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Table 4. Classes for Degree of Surface Rock Fragment Disturbance* <br />I • <br />Class Description Value <br />Stable Depth of soil removal around the 0 or 2 <br />fragments, and/or depth of recent <br />deposits around the fragments is <br />less than .1 in. (2.5 mm ). <br />Slight Depth of soil removal around the 5 <br />fragments, and/or depth of recent <br />deposits around the fragments is <br />between .1 and .2 in. (2.5 to 5 mm), <br />Moderate Depth of soil removal around the 8 <br />fragments, and/or depth of recent <br />deposits around the fragments is <br />between .2 and .4 in. (5 to 10 mm). <br />Critical Depth of soil removal around the 11 <br />fragments, and/or depth of recent <br />deposits around the fragments is <br />between .4 and .8 in. (10 to 20 mm). <br />LJ <br /> <br /> <br />3 <br /> <br /> <br />10 <br /> <br />Severe Depth of soil removal around the 14 <br />fragments, and/or depth of recent <br />deposits around the fragments is <br />over .8 in. (20 mm). <br />*Surface rock fragment disturbance is not evaluated where they are <br />more than 40 in. (1 m.) apart or cover less than 0.2 percent of the <br />surface area. <br />