Laserfiche WebLink
<br />The potential removal depthrwere determined from a comparison of visual and <br />laboratory texture analysis of each sample. The visual review of the description of <br />the soil profiles resulted in the horizons being classified by color, visual texture <br />and presence of rock. When a rocky or heavy clay layer was encountered the cut- <br />off point for potential topsoil removal was established at that level. This cui-off <br />point was moved upward if the laboratory analysis showed a high level of clay or <br />some other unfavorable aspect in the soil not found in the visual appraisal. These <br />limiting factors are noted in Table 1. <br />Fertility <br />During the pre-removal soil inventory, 16 pits were dug and 39 samples were <br />collected and analyzed. The fertility analysis' for each sample are presented in <br />Appendix 2. Table 2 presents the average organic matter, pH and available <br />nitrogen, phosphorus and potassium (NPiC) for each soil mapping unit. <br />Topsoil Salvage <br />During construction topsoil was permanently removed from all areas to be <br />disturbed, with the exception of some areas that were used for temporary access <br />roads, dewatering syste;ns and pipelines. ~~1ost of these temporarily disturbed areas <br />were reseeded and mulched in tiovember 1931 and the remainder are scheduled for <br />Fall 1982. Topsoil in approximately 25 acres was temporarily removed and <br />permanently removed on another 28 acres (Table 3). <br />The permanent topsoil removal operation was conducted using three different <br />removal methods: I) Scrapper, 2) Front-end loader and dump truck, 3) Backhoe and <br />dump truck. In al! cases intact soli profile islands 2 to 4 feet in diameter ,were left <br />to help gauge the rernoval depth. .Yost of the topsoil removal occurred within soil <br />3 <br />