Unstable soils definition

Unstable soils means soils which by their physical nature are not suitable to support buildings, roads, utilities or other manmade development related improvements, or which have the potential for slope failure, erosion, or subsidence. Unstable soils include, but are not limited to, those areas defined as landslide hazard areas, erosion hazard areas, and seismic hazard areas, or other soils which have been determined by the public works director or the building official to be unsuitable for building foundations or structural support.
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Unstable soils means a portion of land that is identified by the Municipal Engineer as prone to slipping, sloughing, or landslides, or is identified by the U.S. Department of Agriculture Natural Resource Conservation Service methodology as having a low soil strength.
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Unstable soils means a portion of land that is identified by the
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Examples of Unstable soils in a sentence

  • Unstable soils include organic soils, fine grain soils saturated with water in excess of their liquid limit, low density fine sands or silts, and expansive soils.

  • Unstable soils are those that are too soft, provide low load bearing or are otherwise inadequate.

  • Unstable soils and rock ledges should be sub-excavated from the bedding zone and replaced by suitable material.

  • Unstable soils prone to slipping or land sliding shall not be graded, excavated, filled or have loads imposed upon them unless the work is performed in accordance with a qualified professional engineer's recommendations to correct, eliminate, or adequately address the problems.

  • Unstable soils include unconsolidated, non-cohesive soils and colluvial debris.The Assessment of Unstable Areas shall include, at a minimum:• All known active and potential shallow and deep-seated landslides, debris flows, debris slides, debris torrents, earthflows, headwall swales, inner gorges, and unstable soils.• All known active or potentially active gullies and streambank erosion sites, as appropriate, but should not include the sites identified in 1.

  • Unstable soils will be as determined by the local county Soil Survey or by a detailed soils report.

  • Unstable soils and rock ledges shall be undercut from the bedding zone and replaced with suitable material.

  • Unstable soils and rock ledges shall be sub-excavated from the bedding zone and replaced by imported material.

  • Unstable soils and rock ledges should be subexcavated from the bedding zone and replaced with suitable material or as directed by the department.

  • Unstable soils prone to slipping or landsliding shall not be graded, excavated, filled or have load imposed upon them unless the work is done in accordance with a qualified professional engineer's recommendation to correct, eliminate, or adequately address the problems.

Related to Unstable soils

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  • Underground injection means the subsurface emplacement of fluids through a bored, drilled or driven well; or through a dug well, where the depth of the dug well is greater than the largest surface dimension. (See also “injection well”.)

  • Contaminated soil means soil that meets all of the following criteria:

  • explosive actuated fastening device means a tool that is activated by an explosive charge and that is used for driving bolts, nails and similar objects for the purpose of providing fixing;

  • noxious liquid substance means any substance designated in Appendix II to this Annex or provisionally assessed under the provisions of Regulation 3(4) as falling into Category A, B, C or D.

  • Controlled dangerous substance means a drug, substance, or

  • Hazardous Substance Activity means any activity, event, or occurrence involving a Hazardous Substance, including, without limitation, the manufacture, possession, presence, use, generation, transportation, treatment, storage, disposal, Release, threatened Release, abatement, removal, remediation, handling of or corrective or response action to any Hazardous Substance.

  • Underground mining means all methods of mining other than surface mining.

  • High global warming potential hydrofluorocarbons means any hydrofluorocarbons in a particular end use for which EPA’s Significant New Alternatives Policy (SNAP) program has identified other acceptable alternatives that have lower global warming potential. The SNAP list of alternatives is found at 40 CFR part 82, subpart G, with supplemental tables of alternatives available at (http://www.epa.gov/snap/ ).

  • Underground facility means any item which shall be buried or placed below ground for use in connection with the storage or conveyance of water, sewage, electronic, telephone or telegraphic communications, electric energy, oil, gas or other substances, and shall include, but not be limited to pipes, sewers, conduits, cables, valves, lines, wires, manholes, attachments and those portions of poles and their attachments below ground.

  • Waterborne disease outbreak means the significant occurrence of an acute infectious illness, epidemiologically associated with the ingestion of water from a public water system which is deficient in treatment, as determined by the Division.

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  • Airborne radioactivity area means a room, enclosure, or area in which airborne radioactive materials, composed wholly or partly of licensed material, exist in concentrations:

  • Underground tank means a device meeting the definition of tank whose entire surface area is totally below the surface of and covered by the ground.

  • Airborne radioactive material means any radioactive material dispersed in the air in the form of dusts, fumes, particulates, mists, vapors, or gases.

  • Hazardous liquid means crude oil, refined petroleum products, liquefied petroleum gases, anhydrous ammonia, liquid fertilizers, liquefied carbon dioxide, alcohols, and coal slurries.

  • Substances means chemical elements and their compounds in the natural state or obtained by any production process, including any additive necessary to preserve the stability of the products and any impurity deriving from the process used, but excluding any solvent which may be separated without affecting the stability of the substance or changing its composition;

  • Aboveground storage tank shall have the meaning ascribed to such term in Section 6901 et seq., as amended, of RCRA, or any applicable state or local statute, law, ordinance, code, rule, regulation, order ruling, or decree governing aboveground storage tanks.

  • Underground storage means storage of hazardous liquid in a subsurface stratum or formation of the earth.

  • Radioactive substance means a substance that emits ionizing

  • Chemical substance means a substance intended to be used as a precursor in the manufacture of a controlled substance or any other chemical intended to be used in the manufacture of a controlled substance. Intent under this subsection may be demonstrated by the substance's use, quantity, manner of storage, or proximity to other precursors or to manufacturing equipment.

  • Low-level radioactive waste or “waste” means radioactive material that consists of or contains class A, B, or C radioactive waste as defined by 10 C.F.R. 61.55, as in effect on January 26, 1983, but does not include waste or material that is any of the following:

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  • Underground storage tank system means an underground storage tank and the connected underground piping, underground ancillary equipment, and containment system, if any.

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