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Soil Pit - Spoil Fertility - Spoil pua lity <br />• Soil fertility and spoil quality samples are collected periodically from shallow postmine <br />soil pits which are randomly located using a 500 foot grid. The postmine soil pits are also <br />used to evaluate plant rooting characteristics and to compare soil/spoil profile data with <br />site specific revegetation data. <br />Postmine soli pits are placed within reclamation blocks that have been soiled and seeded <br />fo[ a minimum of three yea [s. Similar minimum time frames are used for me nitocing postmine <br />vegetation. The permanent vegetation has generally established suf flciently after three to <br />four years to evaluate interactions between rooting characteristics and soil/spoil quality <br />(Schafer et. al.r 1989). <br />Historical soli and spoil quality data for Che 1983 through 1988 reclamation blocks are <br />presented and discussed in previous Topsoil and Spoil Monitoring reports (PCC, 1987 and <br />1989) and the Annual Reclamation Reports IPCC, 1991, 1992, 1993, 19941 that have been <br />submitted to the Di vl sion. Additional soil/spoil fertility samples are planned for the 1999 <br />field season. <br /> Spoil Sampling in the Lennox Highwall Red uct ton Acea <br />• <br /> SCC is requl red to sample final graded spoil from the Lennox highwa ll reduction area on a <br /> 300 foot grid and test for sodium. Exposed sodlc strata with an unsuitable SAR level will <br /> either be burled in the final pit or covered with two to three feet of suitable spoil prior <br /> to soil replacement. No final grading was tnit tat ed in the Lennon highwall reduction area <br /> during the 1998 £l eld season, hence no Lennox spoil samples are presented here. <br />Wolf Creek Spoil <br />SCC is required to sample and analyze final glad ed spoil from the Wolf Creek mining area <br />p rlor to soli replacement. Spoil is sampled on a 300 foot horizontal grid and tested for <br />pH, acid base potential (ABP1, and soil salinity IEC1. Suitable spoil topd ressi ng (subsoil? <br />is replaced prior to soil redis[n button where acid strata (pH <5 and ABP <-5) ate <br />encounteretl. The laboratory analysis data Ss presented in the Lab Da [a Tab and see drawing <br />S29B-5 for the locations of samples taken and subsoil placement. <br />1998 Soil Replacement Thickness <br />SCC is required by CDMG to closely observe and routinely inspect soil replacement thickness <br />in [he Wadqe and Wolf Creek reclamation areas at Seneca II Mine. This monitoring <br />2 <br />