Laserfiche WebLink
SOP No. 210 <br /> Page 7 of 7 <br /> • silt: 0.002 - 0.075 mm; or <br /> • clay: <0.002 mm. <br /> Proportions: For geologic description,proportions of grain sizes will be based upon the <br /> following nomenclature: <br /> • trace: 0-10%; <br /> • little: 10-20%; <br /> • some: 20-35%; or <br /> • and: 35-50%. <br /> The major soil sample constituent is always capitalized and listed first. Minor constituents <br /> also include ancillary materials, such as mica flakes, dark minerals,or naturally occurring <br /> organic matter, such as humus, peat, or other vegetative material. <br /> Geologic Description: Where possible based on existing site data, local research, or <br /> geologic understanding of the local region, include a geologic description of the sample. <br /> Examples include till, fluvial, glaciofluvial, fill material, or Lowell Formation. Do not <br /> utilize geologic description if not certain. <br />