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Rally's Stockton Work Plan g <br /> Project No. 91349.A <br /> SAMPLE DESCRIPTION <br /> Descriptions should include: <br /> 1 .) Color - The color of unconsolidated material should be described in <br /> accordance with the Munsell Color Chart. The color of rock samples should be <br /> described in accordance with the GSA - Rock Color Chart (RCC). The verbal <br /> description of the color should agree with that of the classification given it in <br /> Munsell or GSA-RCC; for example, 2.5YR3/2 should be described as dusky red. <br /> 2.) Texture or Lithology - The Unified Soil Classification System (USCS) should <br /> be used for unconsolidated material. Some general information on the USCS <br /> has been included on pages USCS 1 -8 following Table 1 . If time permits, use <br /> a soil texture kit that can be used to classify soil by its sand, silt, and clay <br /> content. If time permits, it can be used in the field. If not, bag the samples in <br /> the field and texture them in the office. <br /> 3.) Moisture - Classify from dry to saturated. <br /> 4.) Plasticity - A small fraction of the sample is removed, moistened, and rolled <br /> between the hands to form a "rod". A "rod" is defined as moist soil rolled to <br /> approximately 3mm ( 1 /8 inch) diameter. The degree of plasticity is then <br /> described as follows: <br /> Non-plastic - No "rod" is formed <br /> Slightly plastic - Only small (less than one cm long) <br /> "rods" are formed <br /> Plastic - Long (greater than one cm long) "rods" are <br /> formed which fracture or break when the <br /> rods are bent <br /> Very plastic - Long "rods" are formed which do not <br /> fracture when they are bent. <br /> 5.) Consistency or density - If you are drilling and sampling with a California <br /> Split Spoon Sampler (CSSS), use the blow counts to asses density or <br /> consistency. <br />