| Term | Definition |
|---|---|
| Grading Contractor |
A contractor licensed and regulated by the State of California who specialized in grading work or is otherwise licensed to do grading work. |
| Grading Permit |
An official document or certificate issued by the Building Official authorizing grading activity as specified by approved plans and specification. |
| Gravel |
Soil particles ranging from 1/5 inch to 3 inches in diameter. |
| Impermeable Material |
A soil that has properties which prevent movement of water through the material. |
| Infiltration |
That portion of rainfall or surface runoff that moves downward into the subsurface rock and soil. |
| Marsh |
An area of soft, wet, or periodically submerged land, generally treeless and usually characterized by grasses and other low vegetation. |
| Micrscopic Soil Particles |
Clay and silt; particles that cannot be observed by the unaided human eye. |
| Natural Grade |
The ground surface unaltered by artificial means. |
| Noncohesive Soil |
Soil particles that have no natural resistance to being pulled apart at their point of contact, for example, silt, sand, and gravel. |
| NOx |
NOx is the generic term for a group of highly reactive gases, all of which contain nitrogen and oxygen in varying amounts. Many of the nitrogen oxides are colorless and odorless. Nitrogen oxides form when fuel is burned at high temperatures, as in a combustion process. |
| Particulate Matter |
Known as "soot", a black substance consisting chiefly of carbon particles formed by the incomplete combustion of burning matter. |
| Pile |
A long, heavy timber, pipe, or section of concrete or metal to be driven or jetted into the earth or seabed to serve as a support for a bulkhead. |
| Riprap |
A layer, facing, or protective mound of stones, randomly placed to prevent erosion or scour at a structure or embankment, also the stone so used. |
| Rough Grade |
The stage at which the grade approximately conforms to the approved plan |
| Sand |
Soil particles ranging from 3/1000 inch to 1/5 inch in diameter; 3/1000 inch is the normal lower limit at which the unaided human eye can distinguish an individual particle. |
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Glossary
