Laserfiche WebLink
<br />Evaluation of Soils for Reclamation Potential <br />The soils and parent materials on the study area were rated for suitability based on criteria <br />presented in Table 2.04.9-2, Criteria for Evaluating Soil Suitability. These suitability criteria were <br />approved by CDMG in the Permit Amendment for the expansion west of 2700 Road. <br />Recommended topsoil salvage depths were generated for each sampled pedon and each <br />.component of a mapping unit. Salvage depths were determined following a detailed evaluation of <br />PH, electrical conductivity, saturation percent, soil texture, Sodium Adsorption Ratio, calcium <br />carbonate percent, and coarse fragment percent. Threshold suitability criteria shown in TI6 <br />C b4.9=2-were modified in conjunction with the NRCS as part of TR-57 in 2008. <br />Topsoil salvage depths were based on average depths to the suspect parameter or average profile <br />depths (if the entire profile was suitable) across the study area based on numerous soil profile <br />descriptions obtained for each soil type. <br />Table 2.04.9-2: Criteria for Evaluating Soil Suitability (Revised with NRCS 2002) <br />e <br />THRESHOLD SUITABILITY LEVELS' <br />PARAMETER - UNITS <br />Prime Farmland Prime Farmland Lift B <br />k4A.A.- Soils <br /><6.1->8.4 <6.1->8.4 <br />>80% <br />PH <br />Conductivity (mmhos/cm) <br />(Revised June 2008) <br /><2 !C40% <br />>4 >4 <br />>15 <br />15% >40% <br />>.2 ppms >1 ppm6 <br />All soil textures except: s, Is, sc, sic, c <br />>15% `'>35% one location; <br />>10%, 3" diam + A>25% :average) <br />Sodium adsorption ratios <br />Exchangeable Sodium % <br />Calcium carbonate percentage <br />Selenium (ppm) <br />Particle size4 <br />Coarse fragments (%)5 <br />\ I C?? , i <br />