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Soil Unit 2. This soil is an orange-brown color that appears to have a good deal of fine sand <br /> plus silt and clay in lesser amounts. This appears to be the most abundant soil with surface exposure <br /> constituting about 40 to 50 percent of the total visible mass. This soil may have been immediately <br /> below the A and B horizons of the parent soil. During the February 20 inspection there was a patch of <br /> calcareous material on the far south end of the pile. That may have been a calcium pan that was <br /> excavated with the soil. But in June there was no evidence of it still being present. But it is a <br /> possibility that some of this soil has a high calcium content that may show up in the soil test. <br /> Soil Unit 3. This unit is a definite grayish brown and much more gray than brown in many <br /> places. It contains small flecks of what appear to be finely fractured shale, perhaps Pierre Shale. So <br /> this likely came from the lowest part of the column that was excavated. The shale perhaps represents <br /> the parent material of the soil. This is likely below even the C horizon. <br /> It appears the soil were excavated in a vertical fashion and brought to the site with different <br /> layers already somewhat mixed. So, when the material is removed the different types of material <br /> described here will be even further mixed together. As separating the units would be impossible,the <br /> entire stockpile should be considered to be a single unit with sub-unit variations. After moving those <br /> variations will become even less evident as further mixing will occur. Donna Barrentine said in an <br /> email that the physical properties of soils on the site as well as soils or fill brought into the site will be <br /> examined by geotechnical experts to insure the material is safe to use in the locations where it will be <br /> used. <br /> Soil Testing: To insure there are no hidden toxic materials contained in the soil, soil tests <br /> were ordered on 2 lb samples from each of the three visually defined soil units. These tests were also <br /> done to determine whether this material is suitable as a growth medium or an underlayment for a <br /> topsoil layer. These tests are being done by the soil testing lab at Colorado State University. As this is <br /> a very busy time of the year for soil testing, the results will likely not be available until early to mid <br /> July. <br /> Page7of 11 <br />