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24 <br /> The soils have low salt contents and moderate pH; the corrosivity of <br /> steel or concrete is assumed to be low also (Terzaghi, Karl and Peck, <br /> R.B. , 1948; ASTM-C-88-46T, SCS Soils Handbook; others) . <br /> The Stockpiles <br /> Ten topsoil stockpiles, shown on the mine area base map were sampled <br /> and satrples sent to the Peabody Coal Laboratory for analysis. Three <br /> sets of Oa sited samples were taken from different parts of each <br /> stockpile. The results of the analysis are given in Table 6. The <br /> locations of 01(a stockpiles are shown on MAp 3. <br /> A brief description of each stockpile is given here. Stockpiles 1, <br /> 2,3 and 4 are small stockpiles of soil and partly mixed shale and <br /> saristone located some distance southeast of the central office build- <br /> ings on a Mope adjacent to excavations. (See Stockpile Location <br /> Map) Stockpile 1 appears to be a calcareous sandy loam with some 2% <br /> or more of sandstone fragments. Stockpile 2 is nearby and similar <br /> in texture but has some grayish shale fragments mingled with sand- <br /> stone and comprising 5% or more of the total volume. Stockpiles 3 <br /> and 4 are small piles nearby which are similar to 1 and 2 but contain <br /> a few more stones. Stockpile 4 has slightly higher clay content and <br /> higher percentage of CaCO3 9.3% vs 4.2-4.9% for stockpiles 1-3. <br /> The other stockpiles were located along the roads leading to and <br /> surrounding the 116-acre tract and except for No.5 are shown on the <br /> maps of that tract (Maps 1-2) . Stockpile 5 is a reddish-colored <br /> sandy clay loiwm and may be road-cut soil material. Yellowish and <br /> grayish shales wi game sandstone underlies the soil here. Stockpile <br /> 6 is a very small pile ref sandy loam material from the road cuts. <br /> Stockpile 7 is the largest and 'Lies along 1200 feet of the field <br /> road on the northside. The soil is a reddish brown, sandy clay loam <br /> resulting from mixing soil and underlying soft sandy shale. Stock- <br /> pile 8 is across the road at the west end of No.7. The soil is a <br /> pale reddish brown slightly calcareous sandy clay loam. Stockpile 9 <br /> extending sane 900 feet on the east side of the north-south field <br />