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W, <br />Table 2.05.4(2)(d) -1A Spoil and Soil Suitability Criteria (Morgan Prime Farmland) (Revised with NRCS and DRMS 2010) <br />Parameter <br />Threshold Levels <br />Lift A Topsoil and <br />Lift B Topsoil <br />Bench 1 <br />Unit <br />East Area* Subsoil <br />Remaining <br />Mixed Topsoil <br />Substitute <br />Area a <br />Zones, 1, 2, 3, & 4 <br />Zones 3 & 4 <br />Zones 1 & 2 <br />Zones 3 & 4 <br />PH <br />standard units <br /><6.1 <br />>8.4 <br /><6.1 <br />>8.4 <br /><6.1 <br />>8.4 <br /><6.1 <br />>8.4 <br />Electrical Conductivity (EC)' <br />mmho /cm <br />>4 at any location <br />>6 at any <br />>6 at any location or <br />>8 at any <br />location or an <br />an average >5 <br />location <br />average >5 <br />Saturation Percentage <br />% <br /><25,>80 <br /><25, >80 <br /><25,>80 <br />N/A <br />Sodium Adsorption Ratio (SAR) <br />Ratio <br />>4 <br />>4 <br />>4 <br />N/A <br />Exchangeable Sodium (ESP) <br />% <br />>15 <br />N/A <br />N/A <br />N/A <br />Calcium Carbonate <br />% <br />>15 <br />>40 <br />>40 <br />N/A <br />USDA Soil Texture (based on particle <br />All Except <br />S, LS, SC, SIC, C <br />S, LS, SC, SIC, <br />S, LS, SC, SIC, C <br />N/A <br />size analysis)' <br />C <br />Boron <br />ppm <br />N/A <br />N/A <br />>5 <br />>5 <br />Rock Fragments' <br />% <br />N/A <br />>35 in one <br />location and >25 <br />>35 in one location <br />and >25 average <br />N/A <br />average <br />Sample Grid <br />1 per 2.5 acres <br />1 per 2.5 acres <br />1 per 2.5 acres <br />1 per 5 acres <br />Sample Thickness <br />Total lift thickness; max <br />2 -ft increment per <br />Total lift <br />thickness; max <br />33 -inch thickness; 1 <br />sample increment <br />1, 2 -ft thick <br />increment <br />sample <br />2 -ft increment <br />per sample <br />(Revised PR 06) 2.05.4(2)(d) -5 <br />