Laserfiche WebLink
<br />a <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 <br />,-2.'04.9-2 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 2008) <br />PARAMETER - UNITS <br /> <br />Conductivity (mmhos/cm) <br />Sodium adsorption ratio3 <br />Exchangeable Sodium % <br />Calcium carbonate percentage <br />Selenium (ppm) <br />Particle size4 <br />Coarse fragments (%)5 <br />THRESHOLD SUITABILITY LEVELS' <br />Prime Farmland <br /><6.1->8.4 <br />>80% <br /><25% <br />>4 <br />>15 <br />15% <br />>.2 ppms <br />All soil textures except <br />>15% <br />>10% 3" diam + <br />Prime Farmland Lift B <br />and Single-Lift Soils- <br />>80% <br /><25% <br />>4 <br />>40% <br />>1 ppms <br />s, Is, sc, sic, c <br />>35% one location;, <br />(>25% average) <br />"Rob 0M <br />1 fl <br />14N)Orke,j