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<br /> 7 <br /> Comment 8: R-9.6710-J -Construction Verification adds a new level of regulation that is <br /> <br /> f not contained in the Code. <br /> Finding: R-9.6710-J has been deleted. <br /> <br /> i <br /> G. Based on the above findings in response to the comments received, and the <br /> recommendation of staff that Rule R-9.6710 be adopted as amended, I find that adoption of the <br /> Standards for Geological and Geotechnical Analysis Administrative Rule R-9.6710 as hereinafter <br /> set forth is necessary in order to provide direction in meeting the requirements of the Eugene Code, <br /> 1971, and I hereby adopt the following: <br /> i <br /> STANDARDS FOR GEOLOGICAL AND GEOTECHNICAL ANALYSIS <br /> ADMINISTRATIVE RULE R-9.6710 <br /> <br /> i' <br /> ' R-9.6710-A Definitions. <br /> As used in this Rule, the following words and phrases are defined in alphabetical order as <br /> follows: <br /> Design Area: Soil areas within the development site having similar material and <br /> groundwater characteristics, both in physical properties and vertical and horizontal <br /> distribution, such that the engineering design and construction capabilities and constraints <br /> are the same. <br /> Engineering Properties of Soil and Rock: The engineering or physical properties <br /> of soil and rock depend on both the material, or grain, properties and their m-situ, or <br /> undisturbed, texture, packing, particle orientation, and degree of saturation. Shear strength, <br /> ~ ~ com ressibilit , ex ansivit ermeabilit and erodibilit are most often the en meerin <br /> <br /> j p Y p Y~ p Y~ Y g~ g <br /> properties of interest. The engineering characteristics of an in-situ rock mass most often <br /> focus on discontinuities, such as bedding, shear zones, and fractures. Such features are <br /> <br /> ~ described in terms of frequency, attitude, spacing, roughness, bonding quality, and general <br /> <br /> f ~ continuity. <br /> Expansive Soil: Soils containing expansive clay minerals, such as, but not limited <br /> to, montmorillonite, which expands when subjected to a moisture increase and which shrinks <br /> when subjected to a moisture decrease. Soils identified in the Natural Resources <br /> <br /> I ~ Conservation Services soil manual as having a high shrink-swell potential shall be <br /> considered expansive soils. <br /> <br /> i <br /> Index Properties of Soil or Rock: The soil material or grain properties of the <br /> material itself, regardless of the in-situ, or undisturbed, texture, packing, orientation, or <br /> <br /> j degree of saturation. The soil index properties of significance are the properties of the <br /> <br /> ~ individual grains or particles, including the distribution of grain sizes, the shape, angularity, <br /> <br /> ~ and hardness of individual grains; the amount and type of clay minerals, and the presence and <br /> ' amount of organics. The rock index properties include color, texture, degree of weathering, <br /> <br /> ~ hardness, and geologic origin. The soil/rock index properties are used to indicate, or infer, <br /> potential engineering behavior. The index properties are evaluated to reduce the need for the <br /> ' more complex and costly engineering (physical) properties tests. <br /> Administrative Order - 9 <br /> R:'1ADMINORDUZULES\03geotech2ao.wpd(03/26/03 ) <br /> <br />