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• <br />• <br />Shannon & Wilson, Inc. (S &W), uses a soil <br />classification 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 2488 -93) <br />unless otherwise noted. <br />S&W CLASSIFICATION <br />OF SOIL CONSTITUENTS <br />n <br />5 <br />t <br />V <br />b <br />V <br />D <br />a <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 free water, from below water <br />table <br />ABBREVIATIONS <br />ATD <br />At Time of Drilling <br />Elev. <br />Elevation <br />ft <br />feet <br />HSA <br />Hollow Stem Auger <br />ID <br />Inside Diameter <br />in <br />inches <br />Ibs <br />pounds <br />Mon. <br />Monument cover <br />N <br />Blows for last two 6 -inch increments <br />NA <br />Not Applicable or Not Available <br />OD <br />Outside Diameter <br />OVA <br />Organic Vapor Analyzer <br />PID <br />Photoionization Detector <br />ppm <br />parts per million <br />PVC <br />Polyvinyl Chloride <br />SS <br />Split Spoon sampler <br />SPT <br />Standard Penetration Test <br />USC <br />Unified Soil Classification <br />WLI <br />Water Level Indicator <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 soil <br />(slightly silty SAND). <br />• Trace constituents compose 0 to 5 percent of <br />the soil (slightly silty SAND, trace of gravel). <br />GRAIN SIZE DEFINITIONS <br />DESCRIPTION <br />SIEVE SIZE <br />FINES <br />< #200 (0.8 mm) <br />SAND' <br />RELATIVE <br />• Fine <br />#200 - #40 (0.4 mm) <br />• Medium <br />#40 - #10 (2 mm) <br />• Coarse <br />#10 - #4 (5 mm) <br />GRAVEL" <br />#4 - J inch <br />• Fine <br />• Coarse <br />J - 3 inches <br />COBBLES <br />3 - 12 inches <br />BOULDERS <br />> 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 <br />FINE-GRAINED/COHESIVE SOILS <br />N, SPT, <br />RELATIVE <br />N, SPT, <br />RELATIVE <br />BLOWS /FT. <br />DENSITY <br />BLOWS /FT. <br />CONSISTENCY <br />0-4 <br />Very loose <br /><2 <br />Very soft <br />4-10 <br />Loose <br />2-4 <br />Soft <br />10-30 <br />Medium dense <br />4-8 <br />Medium stiff <br />30-50 <br />Dense <br />8-15 <br />Stiff <br />Over 50 <br />Very dense <br />15-30 <br />Very stiff <br />Over 30 <br />Hard <br />WELL AND OTHER SYMBOLS <br />2" I.D. PVC Screen <br />with no backfill in b <br />- Asphalt or PVC Cap <br />Slough <br />F Cobbles <br />® Fill <br />4` Ash <br />® Bedrock <br />Gravel <br />Revision No.: PR -03 <br />2" I.D. PVC riser pipe <br />with no backfill in born <br />s <br />Cement/Concrete <br />® <br />Bentonite Grout <br />Bentonite Seal <br />Silica Sand <br />2" I.D. PVC Screen in <br />Filter Sand <br />- Asphalt or PVC Cap <br />Slough <br />F Cobbles <br />® Fill <br />4` Ash <br />® Bedrock <br />Gravel <br />Revision No.: PR -03 <br />