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15 <br /> v ..0 <br /> Suggested Range of Values of Dynamic Properties <br /> Shear Wave Shear Wave Poisson's Elastic Modulus of <br /> Velocity, Modulus, Ratio, Modulus, Subgrade <br /> fps psi x 103 u psi x 103 Reaction, kcf <br /> Medium dense silty sand fill 400-1100 5-30 0.3 12-80 150-350 <br /> Glass 200- 800 1-10 0.2 2-24 20-350 <br /> Stiff lean clay 500- 900 6-20 0.45 17-60 50-200 <br /> Shear wave velocity and moduli for the medium dense surface fill, if <br /> improved in place or removed and compacted as structural fill, can be estimated <br /> by multiplying the suggested values above by 1.5 to 2. <br /> If further testing, data, or analyses are desired, McClelland Consultants <br /> would be pleased to assist you. <br /> Corrosion Considerations <br /> Concrete. The measured sulfate content of samples of near-surface soils <br /> ranges from 0.008 percent to 0.03 percent. These values are judged to be low, <br /> which indicates a low potential for attack on concrete by sulfates in the surface <br /> soils. The possibility of attack on concrete by sulfates or chlorides leaching <br /> from the glass is considered to be low. <br /> Ferrous Metals . Field resistivity measurements were made at three locations <br /> shown on Plate 2. Data in terms of field electrical resistance values measured <br /> in ohms, were reduced using the Barnes layer method (Earth Resistivity Manual, <br /> published by Soiltest, Inc.) , which provides resistivity values corrected for <br /> masking effects due to overlying layers. The results, in terms of resistivity in <br /> ohm-cm, are presented on Plate 11. The field measured resistivity values range <br /> from 4,400 to 35,000 ohm-cm. These values and variations in the values with <br /> depth and location probably reflect the amount of glass, which is present within <br /> the fill. <br /> In contrast, laboratory measurements of soil resistivity for two samples <br /> were 714, and 1,250 ohm-cm. These values suggest a moderate potential for <br /> corrosion of metal pipes. <br /> Thermal Conductivity <br /> The thermal conductivity of soils depends on the degree of saturation, na- <br /> ture of the interstitial fluids, in situ density, and grain-size characteristics. <br /> 1144A/CC-15 [C <br />