Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
Inspection during construction of sewage works |
-Inspect septic tank -Inspect conveyance piping -Inspect Distribution devices -Inspect trenches -Inspect subsurface emitter system |
|
|
Name three types of sand filters |
1. Open or intermittent sand filters 2. Buried sand filters 3. Recirculating sand filters |
|
|
Soil Colors "Meanings" -Dark brown or black -Reds and yellows -Grey -Whitish or light grey |
-Dark brown/black: usualy topsoil, decomposed organic matter -Reds/Yellows: iron oxide, usually mean soil is well oxidized (well-drained) -Grey: (including blotches; mottles) caused by minerals containing reduced iron, usually mean poor drainage -Whitish/light grey: very leached out horizions |
|
|
Uniform Plumbing Code identifies how many soil types? |
Five; Soil I, II, III, IV, V |
|
|
Uniform Plumbing Code identifies what as best soil type for subsurface systems? What as the worst? |
Soil I composed of sand with minimal silt is excellent Soil IV and V composed of mostly clay, are low absoption capacity and consider to be poor |
|
|
Name the soil classes |
Sand, sandy loam, loam, silt loam, clay loam, silty clay loam, silty clay, and clay |
|
|
Intake rate (a variable) |
Average rate of water entering the soil under irrigation. Less than 0.2 very low 0.75 to 1.25 moderate More than 2.5 high |
|
|
Soil characteristics (Permeable) |
Able to absorb water and allow it to pass through Permeability measure as the number of inches per hour that water moves downward through saturated soil |
|
|
What is slow rate of permeability? What is a hight rate of permeability? |
-Very slow less than 0.06 in/hr -Slow 0.06-0.2 in/hr
-Rapid 6.0-20 in/hr -Very rapid more than 20 in/hr |
|
|
Seepage |
The movement of water through the soil. Seepage adversely affects the specified use |
|
|
Absorption field or seepage pit |
Where Remaining effluent leaves the septic tank and receives further treatment in a subsurface -Consists of a series of trenches |
|
|
Percolation |
the downward movement of water through the soil |
|
|
Percolation test |
Holes are bored at various locations on th site whete the proposed subsurface system is to be constructed |
