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I~ <br />L J <br />• <br />Shannon & Wilson, Inc. (S&W), uses a soil <br />classificafion system modified from the <br />Unified Soil Classification System (USCS). <br />Elements of the USCS and other definitions <br />are provided on this and the following page. <br />Soil descriptions are based on visual- <br />manual procedures (ASTM D 2485-93) <br />unless otherwise noted. <br />S&W CLASSIFICATION <br />OF SOIL CONSTITUENTS <br />D <br />~i <br />3 <br />v <br />i <br />0 <br />0 <br />v <br />u <br />'a <br />• MAJOR constituents compose more than 50 <br />percent, by weight, of the soil. Major <br />constituents are capitalized (SAND). <br />• Minor constituents compose 12 to 50 percent of <br />the soil and precede the major constituents (silty <br />SAND). Minor constituents preceded by <br />"slightly" compose 5 to 12 percent of the sail <br />(slightly silty SAND). <br />• Trace constituents compose 0 to 5 percent of <br />the soil (slightly silty SAND, trace of gravel). <br />MOISTURE CONTENT DEFINITIONS <br />Dry Absence of moisture, dusty, dry to <br />the touch <br />Moist Damp but no visible water <br />Wet Visible tree water, from below water <br />table <br />ABBREVIATIONS <br />0 <br />L <br />D <br />V <br />s <br />i <br />ATD At Tlme of Dulling <br />Elev. Elevation <br />R feet <br />HSA Hollow Stem Auger <br />ID Inside Diameter <br />in inches <br />Ibs pounds <br />Man. Monument cover <br />N Blows for last two 6-inch increments <br />NA Not Applicable or Not Available <br />OD Outside Diameter <br />OVA Organic Vapor Analyzer <br />PID Photoionization Detector <br />ppm parts per million <br />PVC Polyvinyl Chloude <br />SS Split Spoon sampler <br />SPT Standard PeneVation Test <br />USC Unified Soil Classifiraaon <br />WLI Water Level Indicator <br />GRAIN SIZE DEFINITIONS <br />DESCRIPTION SIEVE SIZE <br />FINES <#200 (0.8 mm) <br />SAND' <br />• Fine #200 - #40 (0.4 mm) <br />• Medium #40 - #10 (2 mm) <br />• Coarse #10 - #4 (5 mm) <br />GRAVEL' <br />#4 -~ inch <br />• Fine <br />•Coarse '~-3inches <br />COBBLES 3-12 inches <br />BOULDERS > 12 inches <br />'Unless otherwise noted, sand and gravel, when present, <br />range from fine to coarse in grain Size. <br />RELATIVE DENSITY /CONSISTENCY <br />COARSE-GRAINED SOILS FINE.GRAINEDICOHESIVESOlLS <br />N, SPT, RELATIVE N, SPT, RELATIVE <br />BLOWS/FT. DENSITY BLOWS/FT. CONSISTENCY <br />0 - 4 Very loose <2 Very soft <br />4 - 10 Loose 2 - 4 Soft <br />10.30 Medium dense 4 - 8 Medium stiff <br />30 - 50 Dense 8 - 15 Stitt <br />Over 50 Very dense 15 - 30 Very stiff <br /> Over 30 Hard <br />WELL AND OTHER SYMBOLS <br /> CemenVConcrete Asphalt or PVC Cap <br />® Bentonite Grout ® Cobbles <br /> Bentonite Seal ® Fill <br />///~ Slough Q'4 Ash <br /> Silica Sand ® Bedrock <br /> 2' I.D. PVC Screen <br />(0.020-inch Slol) ® Gravel <br />South Taylor Excess Spoil Fills <br />Geotechnical Study <br />Rio Tinto Energy America <br />SOIL CLASSIFICATION <br />AND LOG KEY <br />July 2006 23-1-01105-200 <br />SHANNON & WILSON, INC. FlG. A-1 <br />coor~nm~l ara Emlmnmenm~ consuttenm Sheet 1 of 2 <br />