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also be taken to verify topsoil salvage depths. This topsoil salvage depth information • <br />will be kept on file at the mine end/or Western Division office. Topsoil recovery depths <br />will be adjusted if warranted by the aforementioned quality control program. <br />The topsoil replacement thickness will be documented and recorded for each reclamation <br />block. The minimum sampling intensity to determine topsoil replacement thickness will be <br />one hole per five acres. This soil replacement thickness information will be used to <br />adjust topsoil salvage depths, if necessary, and for bond release purposes. <br />Topsoil will be tested for phosphorus fertilizer requirements prior to seedbed preparation. <br />When used, phosphorus will be applied prior to seedbed preparation so it can be <br />incorporated into the root zone by the disking operation. Nitrogen fertilizer will not be <br />used in areas to be seeded. A nitrogen application may be made as a topdressing in seeded <br />pasture areas, if warranted by monitoring data, after the perennial vegetation has become <br />sufficiently established. <br />oualitative monitoring for fertility will done on all reclaimed areas as part of the <br />ongoing revegetation success monitoring during the period of liability. Qualitative • <br />monitoring for fertility will include unscheduled visual observations of plant communities <br />throughout the reclamation area. More specific visual observations in conjunction with <br />soil sampling will be conducted at representative revegetation sampling locations. <br />Revegetated areas will not be tested for fertility by soil sampling unless obvious <br />problems appear in the reestebl fished plant community. Obvious problems in the <br />reestablished plant community would include the identification of severe nutrient <br />deficiency symptoms including chlorosis of foliage, irregular spotting, scorching or <br />deformation of Leaves, terminal diebac k, stunted plants end seedling vigor, emergence, and <br />color. These determinations will be made on en annual basis during peek of green <br />revegetation monitoring. Unscheduled observations would also be performed during periodic <br />evaluations of reclamation stand success, transact selection, or monitoring related to <br />bond release evaluations. <br />If fertility problems become evident, topsoil will, et a minimum, be sampled end analyzed <br />for pH, particle size, nitrogen, phosphorus, potassium, and organic matter utilizing <br />standard techniques. Results of the analysis will be maintained et the mine site or • <br />Division office. If analysis also indicates fertility problems, the appropriate <br />10 Revised 03/01/93 <br />