Impervious definition

Impervious. - means not allowing the passage of water through the surface of the ground or ground covering or a substantial reduction in the capacity for water to pass through the surface of the ground or ground covering.

Impervious means a material of sufficient thickness, density and composition that is impenetrable, or has a permeability of less than 1 X 10 7 cm/sec. to the Regulated Substance, and that will prevent the discharge to the lands, ground waters, or surface waters of the State of any Regulated Substance for a period of at least as long as the maximum anticipated time during which the Regulated Substance will be in contact with the material.

Impervious means a material having permeability not greater than 1x10-7 cm per second when subjected to a head of 0.305 m of water where permeability is not affected by the liquid it is meant to contain.

Examples of Impervious in a sentence

• Impervious Fill: Clayey gravel and sand mixture capable of compacting to a dense state.

• Agricultural Impervious Cover – Agricultural or horticultural buildings, structures or facilities with or without flooring, residential buildings and paved areas, but not meaning temporary coverings.

• PAGE 393 10/1/18Replace the 6th paragraph with the following: If Class ASE concrete is used, maintain the surface temperature between 50°F and 90°F 750.03 MATERIALS PAGE 395 10/01/15Add the following item to the table: Impervious Membrane Cure810.01 B Replace the paragraph directly after the table with the following: For imprinted concrete use any size coarse aggregate specified in Section 802.01 C.2, “Coarse Aggregate”.

• PAGE 388 10/01/19748.03 MATERIALS PAGE 393 10/01/15 &10/01/19 Add the following item to the table: Impervious Membrane Cure 810.01 B.1 or810.01 B.2Replace Expansion Joint Material with the following: Item SectionExpansion Joint Material 826.02 C or F 748.04 D Curing.

• Selection of the glove material on consideration of the penetration times, rates of diffusion and the degradation Protective gloves Impervious gloves• Material of glovesThe selection of the suitable gloves does not only depend on the material, but also on further marks of quality and varies from manufacturer to manufacturer.

More Definitions of Impervious

Impervious means materials and/or construction that prevents or greatly reduces the infiltration of water into the soil.

Impervious means nonporous, impenetrable, smooth, and washable.

Impervious means a hard surface area (e.g., driveway or rooftop) that prevents or impedes the entry of water into the soil, thus causing water to run off the surface in greater quantities or at an increased rate of flow, as defined in Section11.02.010.

Impervious means the ability of a base surface underneath Containers or tank systems, free of cracks, gaps or areas of bare earth, to prevent and inhibit the migration of spilled or leaked material until the material is detected and removed; or the ability for a cover of a Container to prevent the infiltration of precipitation.

Impervious means a natural material that demonstrates a hydraulic conductivity of 10-6 cm/s or less as determined in situ or of 10-7cm/s or less as determined in a laboratory from a representative disturbed sample, or a synthetic membrane liner or barrier appropriately selected to control the migration of specific fluids;

Impervious means that which will not allow entrance or passage, such as an airtight plastic container that will not allow the entrance of moisture or vermin.

Impervious means not allowing fluid to pass through.