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TABLE III-G-S <br /> 1979 <br /> PHYSICAL CHARACTERISTICS <br /> TUNNEL AREA <br /> Organic <br /> Saturation :Matter <br /> M ( ) <br /> 1 48 . 7 4 .82 <br /> 2 49 . 3 5 . 21 <br /> 3 31 . 2 0 . 94 <br /> 4 47 .4 4 . 83 <br /> 5 51 . 2 5 . 06 <br /> 6 43 . 7 6 . 12 <br /> 7 41 . 2 5 . 81 <br /> 8 48 . 8 4 . 99 <br /> 9 -- 0 . 24 <br /> 10 -- 0 . 29 <br /> 11 46 . 7 4 . 16 <br /> 12 47 .8 4 . 72 <br /> 13 50 .1 4 .01 <br /> 14 47 . 2 3 . 92 <br /> Samples from the tunnel area (1979) indicated that <br /> pHs of the materials are all in the "normal" ranges . <br /> Salt hazard (electrical conductivity) : Tests of <br /> the permit area indicate that electrical conductivities <br /> of the soil are relatively low and indicate no hazards due <br /> to saline conditions . <br /> Tests of the tunnel area (1979) indicated that <br /> salt concentrations are quite low, indicating very low salt <br /> hazards . <br /> Sodium Absorption Ratio : Tests of the permit area <br /> indicate calcium, magnesium and sodium are all in the <br /> medium range, and the sodium absorption ratio (SAR) of all <br /> the samples is low. The data indicate little sodium hazard <br /> potential . <br /> -11- <br />