Reso13 PC 13-09 2859 Initial Study Mitigated Negative Declaration Kensington

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LABORATORY TEST RESULTS Laboratorv Testinq Proqram Laboratory tests were performed on representative soil samples to determine their relative engineering properties. Tests were performed in general accordance with test methods of the American Society for Testing Materials or other accepted standards. The following presents a brief description of the various test methods used. Classification - Soils were classified visually according to the Unified Soil Classification System. Visual classifications were supplemented by laboratory testing of selected samples in general accordance with ASTM D2487. The soil classifications are shown on the Exploration Logs. In-Situ Moisture/Density - The in-place moisture content and dry unit weight of selected samples were determined in general accordance with ASTM D2216 using relatively undisturbed samples from the linear rings of a 2.38 inch I.D. modified California Sampler. The dry unit weight and moisture content are shown on the Boring Logs. Atterberg Limits — The liquid limit, plastic limit, and plasticity index of a selected representative sample was determined in accordance with ASTM D4318. Expansion Index - Expansion index testing was performed on a representative sample of the on-site soils, remolded and surcharged to 144 pounds per square foot in general accordance with the Uniform Building Code Standard No. 18-2. Sieve Analysis — Grain size testing was performed on representative samples of the on- site soils, in general accordance with ASTM C136. Soluble Sulfate - The soluble sulfate content of a representative sample of the on-site soils was determined in general accordance with EPA Method 300.0. Soluble Chlorides - The soluble chloride content of a representative sample of the on- site soils was determined in general accordance with EPA Method 300.0. Resistivitv- The resistivity of a representative sample of the on-site soils was determined in general accordance with AASHTO Method T 288-91. �H - The pH of a representative sample of the on-site soils was determined in general accordance with AASHTO Method T 289. Unconfined Compressive Strength —The unconfined compression test is used to quickly obtain a measure of compressive strength for those soils that possess sufficient cohesion to permit testing in the unconfined state with ASTM D2166.