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interbedded volcanic detritus derived from the Mehrten Formation, moderately
<br /> consolidated" (Plate 7).
<br /> The surface and near surface soils located at the Site are reported by the USDA Web
<br /> Soil Survey to be composed of Cometa sandy loam, Keyes-Redding complex,
<br /> Montpellier-Cometa complex, Redding gravelly loam, Rocklin sandy loam, and
<br /> Yellowlark gravelly loam (Plate 8) (USDA, 2009). The table below presents some
<br /> selected properties of these soils:
<br /> Table 1. Selected Properties of On-Site Soils (USDA, 1992)
<br /> Soil Name Depth Unified Soil Salinity Soil Perme- Septic tank
<br /> and Map mmhos/ Reaction ability absorption
<br /> Symbol (in) Classification cm pH (in/hr) fields
<br /> Cometa 0-22 Sandy loam, SM, SC- <2 5.6-6.5 0.6 - 2.0 Severe:
<br /> sandy loam, SM peres slowly
<br /> 134 22-36 Sandy clay, clay, clay <2 6.1 - 7.3 <0.06
<br /> loam, CL, CH
<br /> 36-60 Stratified sandy loam to <2 6.6 -7.3 <0.06
<br /> sandy clay loam; SM,
<br /> SC-SM, SC
<br /> Keyes 0-6 Gravelly loam, GM-GC, <2 5.6- 7.3 0.6-2.0 Severe:
<br /> gravelly GM, SC-SM, SM depth to
<br /> loam, 6-13 Gravelly clay, gravelly <2 6.1 - 7.3 <0.06 rock,
<br /> 188 clay loam, GC, CL, CH cemented r -;
<br /> 13-34 Indurated — -- -- pan
<br /> 34 Weathered bedrock ---
<br /> Redding 0-16 Gravelly loam, SC, SC- <2 5.1 -6.5 0.6-2.0 Severe.
<br /> gravelly SM, GC, GM-GC cemented
<br /> loam, 16-22 Clay, clay loam. CH, CL <2 5.1 - 6.5 <0.06 pan
<br /> 188 22-60 Indurated --- --- ---
<br /> Montpellier 0-20 Coarse sandy loam, SM <2 5.6- 7.3 2.0-6.0 Severe:
<br /> coarse 20-43 Sandy clay loam, SC <2 5.6 - 7.3 0.2 - 0.6 peres slowly
<br /> sandy loam, 43-55 Coarse sandy loam, SM <2 6.6- 7.3 0.2 - 0.6
<br /> 200 55-60 Sandy loam, coarse, <2 6.1 - 7.3 <0.06
<br /> sandy loam, SM
<br /> Cometa 0-22 Sandy loam, SM, SC- <2 5.6-6.5 0.6 - 2.0 Severe:
<br /> sandy loam, SM peres slowly
<br /> 200 22-36 Sandy clay, clay, clay <2 6.1 - 7.3 <0.06
<br /> loam, CL, CH
<br /> 36-60 Stratified sandy loam to <2 6.6 - 7.3 <0.06
<br /> sandy clay loam, SM,
<br /> SC-SM, SC
<br /> LOGE 1217 Page 5
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