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1.3 A report that includes site and soil characteristics in relation to the proposed <br /> development, identification of potential problems, and recommendations for design and <br /> construction techniques and standazds consistent with other standards applicable to the <br /> development proposal. The investigation report shall classify all soil types encountered <br /> using the Unified Sonl Classification System (Exhibit B), AASHTO classification (Exhibit <br /> C), or the Uniform Building Code Standazd 18-1 (Exhibit D), and all rock types using an <br /> f engineering rock classification system. Classification shall be done by visual-manual <br /> methods and confirmed by laboratory index properties tests of typical samples. Engineering . <br /> properties tests, field or laboratory, are not required. Water levels shall be observed in pnt <br /> excavations or borings. <br /> 2. Investigation Method. <br /> 2.1 Methods for Making Pits. Trenches, and/or Borings. Excavations for <br /> f sampling of soils/rock from below the surface may consist of pits, trenches, or borings, made <br /> k by hand or by machine. Any device, such as a backhoe, excavator, hand auger, machine <br /> auger, thick wall tube, or vibrating tube that will permit excavation to the desired sampling <br /> ~ depth and allow access for disturbed sampling of the soil or rock is acceptable. <br /> 2.2 Number and Locations of Pits and/or Borings. The spacing, locations and <br /> depths of pits, trenches, or borings shall be in accordance with the provisions of Exhibit A, , <br /> j~ ~ "Minimum Requirements for Spacing and Depth of Pits and Borings for Sampling Soils and . <br /> Rock." <br /> 2.3 ' Soil and Rock Material Properties. The soil material properties of <br /> E significance are texture (grain size distribution), Atterberg limits, Plasticity Index, Expansive <br /> Index, organic content, and relative densityand/or consistency. The rock material properties <br /> include color, texture, degree of weathering, hardness, and geologic name. The sonl/rock . <br /> material properties are useful for classification and as index properties, or indicators, or <br /> correlation with the physical behavior properties. They are used to reduce the need for the <br /> l more complex and costly engineering (physical) properties tests and must be identified, by <br /> formal laboratory test or by visual-manual estimate, and described for every soil deposrt <br /> found in the subsurface investigation. <br /> 3. Report Content. <br /> 3.1 Introduction. Must include the same information required in a Level l report. <br /> 3.2 Project Location and Description. Must include the same information <br /> required in a Level 1 report. <br /> 3.3 Site Investi ag <br /> tion. <br /> 3.3.1 Development of the investigation. (Include who specified it and why <br /> the investigation was done in the manner it was done.) <br /> 3.3.2 Scope of field work. (Include how many test pits/test borings were <br /> made, what type, and where.) <br /> ~ 3.3.3 Drilling, sampling, and field testing program and methods; <br /> ASTM/AASHTO references. <br /> 3.3.4 Laboratory testing program (samples tested; procedures used, ASTM <br /> references). <br /> i~; . <br /> <br /> ~rr~ Administrative Order - 9 <br /> rledmiaord\rules\02geotech l ao.wpd(09/05/02) <br /> <br />