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4.2.2 EC <br />Electrical conductivity values typically increased with depth (Figure 28). Values in the <br />0-6" samples were low and relatively consistent across Test Plots and treatments, <br />ranging from 0.7 to 3.0. In the 6-12" depth range, EC values were consistently higher <br />in the shallower soils (12") and lower in this depth range in deeper soils (24"). Values <br />' in the 12-18" depth range were higher than in upper soil levels, and this trend <br />continued at greater depths. Four samples exceeded recommended EC levels (12.0) for <br />reclamation soils (Montana DSL, 1988, New Mexico CSMC, 1989, Wyoming DEQ, <br />1989, Utah DOGM, 1988). These were samples from the Test Plot 1 48" treatment at <br />12-18" deep, 18-24" deep, 24-36" deep, and 36-48" deep. <br />4.2.3 SAR <br />Figure 29 graphically represents sample SAR values across soil depths and Test Plots. <br />' The general trend is toward increasing SAR values with increasing soil depths. In the <br />shallower soils (6" and 12") SAR values remain low. In the deeper soils, SAR values <br />increase markedly below 18" in depth. Six samples exceeded recommended SAR <br />' levels (18.0) for reclamation soils (Montana DSL, 1988, New Mexico CSMC, 1989, <br />Wyoming DEQ, 1989, Utah DOGM, 1988). These were samples from the Test Plot 1 <br />24" treatment at 18-24", Test Plot 1 48" treatment at 12-18" deep, 18-24" deep, 24-36" <br />deep, 368" deep, and the Test Plot 2 24" treatment at the 18-24" depth. <br /> <br />