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The topsoil for CRDA-2 was borrowed from topsoil pile numbers 2, 7, 8 <br />and 9 with the presumption the topsoil had an acceptable quality. The <br />• <br />• <br />quality of the topsoil in pile number 2 was questionable from the beginning <br />based upon soil samples SS-7 and SS-23. A small portion of topsoil pile <br />number 2 was hauled to CRDA-2. A sample of pile number 2 was taken <br />on February 26, 2002 in the active face. Results of that sample confirmed <br />the poor quality of topsoil pile number 2. A decision was made at that <br />time to not utilized pile number 2 as topsoil. Topsoil sampling was <br />performed on material placed on CRDA-2. Seven of the fifteen samples <br />exceed the limits for SAR or EC for topsoil (12 and 8 respectively) and <br />eleven of the fifteen samples had better subsoil than topsoil. <br />Soil sampling was performed at Cameo Borrow Area No. 2. Soil quality <br />was fair in the borrow area. Based on the experience with the topsoil <br />quality mentioned above, it was decided to borrow all material for the <br />CRDA-1 cover material from CBA-2 with no separate accounting for <br />topsoil. As can be seen from the sampling at CRDA-1, two areas <br />exceeded the subsoil limit for EC and one area exceeded the subsoil limit <br />for SAR. Soil sampling performed at the Roadside Borrow Area showed <br />good quality. The technique used to excavate and place the cover <br />material from the RBA to the RSRDA caused significant mixing of the <br />soils. This is demonstrated by the soil sampling performed on the <br />RSRDA. The maximum EC and SAR values at RSRDA are 8.0 and 9.63 <br />respectively. Topsoil piles at the North Portal were also sampled and <br />analyzed. Based on analytical data, topsoil stockpile number 3 appeared <br />to be the most suitable topdressing material, therefore it was utilized to <br />cover most of the North Portal Area. Topsoil stockpile number 2 was <br />utilized as subsoil. Topsoil stockpile number 1 was utilized to cover a <br />portion of the North Portal Area. See Appendix 9-7 for a tabulation of <br />laboratory results and soil sample location maps. <br />9-5 (Rev. 4/03) <br />