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  2. Network for Earthquake Engineering Simulation - Wikipedia

    en.wikipedia.org/wiki/Network_for_Earthquake...

    The George E. Brown, Jr. Network for Earthquake Engineering Simulation hosts two geotechnical centrifuges for studying soil behavior. The NEES centrifuge at University of California Davis has radius of 9.1 m (to bucket floor), maximum payload mass of 4500 kg, and available bucket area of 4.0 m2. [ 17 ]

  3. Standard penetration test - Wikipedia

    en.wikipedia.org/wiki/Standard_penetration_test

    The standard penetration test (SPT) is an in-situ dynamic penetration test designed to provide information on the geotechnical engineering properties of soil. This test is the most frequently used subsurface exploration drilling test performed worldwide. The test procedure is described in ISO 22476-3, ASTM D1586 [1] and Australian Standards AS ...

  4. R-value (soils) - Wikipedia

    en.wikipedia.org/wiki/R-value_(soils)

    Many other agencies have adopted the California pavement design method, and specify R-Value testing for subgrade soils and road aggregates. The test method states: The R-value of a material is determined when the material is in a state of saturation such that water will be exuded from the compacted test specimen when a 16.8 kN load (2.07 MPa ...

  5. Geotechnical investigation - Wikipedia

    en.wikipedia.org/wiki/Geotechnical_investigation

    A USBR soil scientist advances a Giddings Probe direct push soil sampler.. Geotechnical investigations are performed by geotechnical engineers or engineering geologists to obtain information on the physical properties of soil earthworks and foundations for proposed structures and for repair of distress to earthworks and structures caused by subsurface conditions; this type of investigation is ...

  6. Soil test - Wikipedia

    en.wikipedia.org/wiki/Soil_test

    A soil test is a laboratory or in-situ analysis to determine the chemical, physical or biological characteristics of a soil. Possibly the most widely conducted soil tests are those performed to estimate the plant-available concentrations of nutrients in order to provide fertilizer recommendations in agriculture.

  7. Homeless crackdown gains momentum in California as US Supreme ...

    www.aol.com/news/homeless-crackdown-gains...

    San Diego in June 2023 passed the Unsafe Camping Ordinance with a 5-4 vote on a city council made up entirely of Democrats, allowing police to enforce camping laws at transit hubs, parks or within ...

  8. Base-cation saturation ratio - Wikipedia

    en.wikipedia.org/wiki/Base-cation_saturation_ratio

    Base-cation saturation ratio (BCSR) is a method of interpreting soil test results that is widely used in sustainable agriculture, supported by the National Sustainable Agriculture Information Service (ATTRA) [1] and claimed to be successfully in use on over a million acres (4,000 km 2) of farmland worldwide.

  9. List of Superfund sites in California - Wikipedia

    en.wikipedia.org/wiki/List_of_Superfund_sites_in...

    CERCLIS ID Name County Reason Proposed Listed Construction completed Partially deleted Deleted CA0001576081: AMCO Chemical: Alameda: Groundwater, soil, and soil gas are contaminated with chlorinated solvents and other contaminants including vinyl chloride.