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Non-Marine Clay Shrink-Swell Soils
Non-marine clay shrink swell soils in Fairfax County. These are soils containing other shrinking-swelling clays that can lead to foundation distress if precautions are not taken during design and construction.
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Marumsco Soils
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Marumsco soils in Fairfax County. Marumsco soils are mapped in complexes with other soil types. The complexes are highly variable and consist of combinations of clays, silts, sands, and gravels. They may also be problematic. In steep areas that contain clays known as "marine clays" slope stability can be a problem. In addition, structures constructed on clays found in this complex could suffer foundation distress if adequate precautions are not taken during design and construction.
Potential Asbestos Containing Soils
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Potential asbestos containing soils in Fairfax County. These soils are mapped over naturally asbestos-containing bedrock. Safety precautions must be taken during construction. Orange soils, which overlie a majority of this geology, also contain shrinking-swelling clays which can cause foundation distress.
Soils - 2018
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,,This data set is based upon the 2011 soil survey prepared by the US Department of Agriculture-Natural Resources Conservation Service. The 2011 soil survey was prepared to National Cooperative Soil Survey standards and utilized nationally recognized names for soil types. The 2018 soil map legend is identical to the 2011 legend, but the soil boundaries have been shifted to better correlate with topography and land use. This map was officially adopted by the Board of Supervisors in 2018. All construction plans submitted to the County for permits that require the inclusion of soils mapping should reference the 2018 soils map.,,
Soil Properties - 2018
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Table of properties of soil types. One to many relate with the Soils 2018 layer.
Quarries
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Quarries in Fairfax County.
Landfills
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Landfill properties in Fairfax County.
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