ARCHIVED REPORTS_1989 - Laserfiche WebLink

Home Browse Search

1 x 10-6 to 1 x 10-8 cm/sec when remolded at 95 percent relative compaction (ASTM Test Designation D1557 -78A). No chemical testing of soils underlying the site was performed since that is not needed to formulate detailed site design criteria. Data from the seismic refraction survey indicate that the sediments (to approximately 100 feet) are characterized by low velocity (1,250 to 1,560 ft/sec) materials to medium velocity (2,920 to 3,850 ft/sec) materials that will be readily rippable with heavy equipment. B. CAPILLARY RISE Subchapter 15 requires estimates of capillary rise in site soils. The rise of water and other fluids through the pore spaces of rocks and soil is believed to be caused by (1) molecular attraction between the solid materials and the fluid and (2) the surface tension of the fluid. The height of capillary rise in soil is controlled by the size of the interconnected pores and openings in the soil (Lohman, 1972). To estimate the height of capillary rise of water at the proposed landfill site soil samples were obtained during drilling from zones immediately above the ground -water table and described in detail. Interpretation was based on information presented by Lohman (1972) on the height of capillary rise in unconsolidated soils of various grain sizes. In Well G-1, soils immediately overlying the ground -water table consist of silty sand (SM). Soils immediately overlying the ground- water table in Well G-2 consist of silty sand to sandy silt (ML). According to Lohman (1972), the expected capillary rise in Well G-1 would be 42.8 centimeters, while the capillary rise in G-2 would be 105.5 centimeters. PJ9 9390206.00D 17 It is assumed that capillary rise will not pose construction con- straints at the proposed landfill site since (1) expected heights of PJ9 9390206.00D 17