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1 <br />Srwh~ Plan Drsign <br />' This phase helped WFU and DMG determine the mix of topsoiUsubsoil cover which was placed <br />' on the refuse disposal azea and set a procedure for conducting statistical evaluation of the <br />revegetation success. <br />' Test Plot Reclamation Plan <br />' The test plot reclamation plan consisted of the following tasks. <br />• Eight test plots, each 30 x 30 meters in size, were established and fenced in RP-1. Four of <br />' these plots have northern exposure. The other four plots have southern exposure. Figure 1 <br />shows the location of these plots. <br />' Each set of the four test plots were covered with varying thicknesses of topsoil/subsoil: <br />12-inch, 24-inch, 36-inch and 48-inch. All plots have 12-inches of topsoil cover. On the <br />12-inch cover plot, all of the material is topsoil with no subsoil. The other three plots have <br />' 12-inch. 24-inch, and 36-inch of subsoil under the 12-inches of topsoil. The test plots were <br />constructed from April to July 1990 concurrent with the reclamation of refuse disposal area <br />RP- l . <br />The following are plot designations with associated cover depths as shown on Figure 1: <br />' Sl - 12" Topsoil NI - 12" Topsoil <br />S2 - 12/12" Topsoil/Subsoil NZ - 12/12" Topsoil/Subsoil <br />S3 - 12/24" Topsoil/Subsoil N3 - 12/24" Topsoil/Subsoil <br />' S4 - 12/36" Topsoil/Subsoil N4 - 12/36" Topsoil/Subsoil <br />• A total of eight soil samples were collected on June 21, 1990 by WFU and analyzed for <br />' characteristic parameters. Four samples were collected on the north and south plots. Samples <br />were collected at the approximate center point of each plot and composited for each lift; <br />' l2-inch, 24-inch, 36-inch, and 48-inch. That is, all four samples taken from the 12-inch <br />increment on each exposure were composited (labeled as 1 foot lifr), the three samples taken <br />from the ]2-inch to 24-inch increment were composited (labeled as 2 foot lifr), the two <br />' samples taken from the 24-inch to 36-inch increment were composited llabeled 3 foot lift) <br />and the 36-inch to 48-inch sample was labeled as the 4 toot lifr. This was done for the north <br />and south test plots. <br />' The test plots were mulched with straw, and seeded with a rangeland seed drill to form a <br />crimped mulch. The seed mix used on the test plots is contained in Table 1. <br />1 <br /> <br /> <br />'_36-0'_\I\~eg-rp0 3 <br />