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<br /> 30 July 2008
<br /> AGE-NC Project No. 99-0682
<br /> Page 7 of 13
<br />'i 63 to 70 feet bsg, 74 to 88 feet bsg, 92 to 116 feet bsg, 120 to 126 feet bsg, and 131 to 140 feet bsg.
<br /> Sandy silt and clayey silt were inferred from 50 to 62 feet bsg and 88 to 92 feet bsg. Silty sand and
<br /> sandy silt were inferred from 29 to 30 feet bsg, 70 to 71 feet bsg, and 126 to 127 feet bsg. Sand was
<br /> inferred from 62 to 63 feet bsg, 71 to 74 feet bsg, 116 to 120 feet bsg and 127 to 131 feet bsg.
<br /> In CPT-8, clayey silt, silt, silty clay, and clay were inferred from 5 to 6 feet bsg, 9 to 13 feet bsg, 15
<br /> to 23 feet bsg, 30 to 40 feet bsg, 42 to 46 feet bsg, 64 to 66 feet bsg, 68 to 69 feet bsg and 70 to 78
<br /> feet bsg. Sandy silt and clayey silt were inferred from 46 to 64 feet bsg. Silty sand and sandy silt
<br /> were inferred from 8 to 9 feet bsg, 13 to 15 feet bsg, 23 to 24 feet bsg, 40 to 41 feet bsg, and 66 to
<br /> 67 feet bsg. Sand was inferred from 6 to 8 feet bsg, 24 to 29 feet bsg, 41 to 42 feet bsg, 67 to 68 feet
<br /> bsg, 69 to 70 feet bsg, and 78 to 80 feet bsg.
<br /> At boring MW9, brown-gray silty clay and clay, with generally low to moderate plasticity and
<br /> toughness, were encountered from 50 to 64 feet bsg; fine and medium grain, moderately graded sand
<br /> with some clay and silt was encountered from 65 to 70 feet bsg.
<br /> At boring MW 10 (located off-site to the east), brown-gray silty clay and clay, with generally low to
<br /> moderate plasticity and toughness, were encountered from 50 to 64 feet bsg; fine and medium grain,
<br /> moderately graded sand and fine grain, poorly graded silty sand were encountered from 65 to 69 feet
<br /> bsg; gray clay, with low plasticity and toughness, was encountered at 70 feet bsg. At boring MWl 1 ,
<br /> gray silty clay, with low to moderate plasticity and toughness, was encountered from 50 to 55 feet
<br /> bsg; fine to medium grain, poorly to moderately graded silty sand was encountered at 60 feet bsg;
<br /> gray silt, with low plasticity and toughness, was encountered at 65 feet bsg; gray clay, with high to
<br /> moderate plasticity and toughness, was encountered at 70 feet bsg.
<br /> Units that appear to correlate across A-A' , B-B ' and C-C' are the sand to silty sand from generally
<br /> 25 to 35 feet bsg and 60 to 70 feet bsg. Units that appear to correlate across A-A ' and B-B ' are the
<br /> sand to silty sand from generally 127 to 135 feet bsg.
<br /> Confirmation numbers for GeoTracker GEO_MAP and GEO_BORE (CPT-6, CPT-7, CPT-8,
<br /> MW-9, MW- 10 and MW- 11 ) submittals are 1754439413, 3376021444, 8599437892, 12277823093
<br /> 1847273886, 3492613852 and 9772827625 respectively.
<br /> 3 .2. HYDROGEOLOGIC MODEL
<br /> Hydrogeologic units (HUs) are defined as a body of sediment that has hydrogeologic characteristics
<br /> (i.e. hydraulic conductivity, pore pressure, etc.) that make it distinct from surrounding bodies of
<br /> sediment (Sanders, 1998), or a part of a body of rock that forms a distinct hydrologic unit with
<br /> respect to the flow of groundwater (Maxey, 1964). A `flow unit' maybe defined as a hydrogeologic
<br /> Advanced GeoEnvironmental, Inc.
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