Laserfiche WebLink
PANOCHE BURN SITE REMEDIATION <br /> 3.6 Soil Tests <br /> In August 1996, the CIWMB requested Sukut to determine the physical properties of the <br /> native soil. The results indicated the onsite soils were sandy lean clay (CL) with a plasticity <br /> index of 16 to 20. The percent fine passing the No. 200 sieve was 55 to 60 and the percent <br /> passing the No. 30 sieve was 90 and 78. Based on these initial soil tests, the CIWMB <br /> engineer accepted the soil as a suitable low permeability cover and material for the <br /> check dam. <br /> On November 21, 1996, three additional soil samples were collected. The purpose of the <br /> second round of sampling was to verify the original soil samples and further define the on- <br /> site soils. Each soil sample was analyzed for moisture content, sieve analysis, Atterberg <br /> Limits, maximum density-optimum moisture content, and permeability. <br /> Each soil sample was taken from distinct areas. Sample No. 1 was taken directly from the <br /> barrier layer, Sample No. 2 was collected at the retention dam, and Sample No. 3 was col- <br /> lected from a stockpile of soil, which was used to construct the retention dam. The samples <br /> were classified using the Unified Soil Classification System (USCS). All of the soils were <br /> sandy lean clay (CL). The moisture content, plasticity index, maximum density, optimum <br /> moisture, and permeability (hydraulic conductivity) are summarized in Table 9. Copies of <br /> these soil tests are included in Appendix M. <br /> CIWMB 34 <br />