Washington State Septic Installers - Questions
With Expert Solutions
What is the minimum separation for a well or suction line (list all 3)
Correct Ans - 100', 50', 50'
What is the minimum separation for a public well (list all 3)
Correct Ans - 100',100',100'
What is the minimum separation for a water main (list all 3)
Correct Ans - 10',10',10'
What is the minimum separation for a surface water table at normal
height Correct Ans - 100',50',10'
soil type 1 Correct Ans - Gravelly and very gravelly coarse
sands, all extremely gravelly soils excluding soil types 5 and 6, all
soil types with greater than or equal to 90% rock fragments.
soil type 2 Correct Ans - Coarse sands.
solid type 3 Correct Ans - Medium sands, loamy coarse sands,
loamy medium sands
soil type 4 Correct Ans - Fine sands, loamy fine sands, sandy
loams, loams.
soil type 5 Correct Ans - Very fine sands, loamy very fine
sands; or silt loams, sandy clay loams, clay loams and silty clay
loams with a moderate or strong structure
soil type 6 Correct Ans - Other silt loams, sandy clay loams,
clay loams, silty clay loams.
, soil type 7 Correct Ans - Sandy clay, clay, silty clay, strongly
cemented or firm soils
what is the minimum design flow per capita per day Correct Ans -
45 gpd
what is the minimum design flow per bedroom per day Correct
Ans - 120 gpd or 90 gallons x 1.33 per bedroom
what is the minimum design limit for a 3 bedroom home Correct
Ans - 900 gallons
what is the maximum effluent loading rate for soil type 1 Correct
Ans - 1 gallon per sqft per day
what is the maximum effluent loading rate for soil type 2 Correct
Ans - 1 gallon per sqft per day
what is the maximum effluent loading rate for soil type 3 Correct
Ans - .8 gallon per sqft per day
what is the maximum effluent loading rate for soil type 4 Correct
Ans - .6 gallon per sqft per day
what is the maximum effluent loading rate for soil type 5 Correct
Ans - .4 gallon per sqft per day
what is the maximum effluent loading rate for soil type 6 Correct
Ans - .2 gallon per sqft per day
what is the maximum depth of the infiltrative surface below the pipe
Correct Ans - 3 feet
With Expert Solutions
What is the minimum separation for a well or suction line (list all 3)
Correct Ans - 100', 50', 50'
What is the minimum separation for a public well (list all 3)
Correct Ans - 100',100',100'
What is the minimum separation for a water main (list all 3)
Correct Ans - 10',10',10'
What is the minimum separation for a surface water table at normal
height Correct Ans - 100',50',10'
soil type 1 Correct Ans - Gravelly and very gravelly coarse
sands, all extremely gravelly soils excluding soil types 5 and 6, all
soil types with greater than or equal to 90% rock fragments.
soil type 2 Correct Ans - Coarse sands.
solid type 3 Correct Ans - Medium sands, loamy coarse sands,
loamy medium sands
soil type 4 Correct Ans - Fine sands, loamy fine sands, sandy
loams, loams.
soil type 5 Correct Ans - Very fine sands, loamy very fine
sands; or silt loams, sandy clay loams, clay loams and silty clay
loams with a moderate or strong structure
soil type 6 Correct Ans - Other silt loams, sandy clay loams,
clay loams, silty clay loams.
, soil type 7 Correct Ans - Sandy clay, clay, silty clay, strongly
cemented or firm soils
what is the minimum design flow per capita per day Correct Ans -
45 gpd
what is the minimum design flow per bedroom per day Correct
Ans - 120 gpd or 90 gallons x 1.33 per bedroom
what is the minimum design limit for a 3 bedroom home Correct
Ans - 900 gallons
what is the maximum effluent loading rate for soil type 1 Correct
Ans - 1 gallon per sqft per day
what is the maximum effluent loading rate for soil type 2 Correct
Ans - 1 gallon per sqft per day
what is the maximum effluent loading rate for soil type 3 Correct
Ans - .8 gallon per sqft per day
what is the maximum effluent loading rate for soil type 4 Correct
Ans - .6 gallon per sqft per day
what is the maximum effluent loading rate for soil type 5 Correct
Ans - .4 gallon per sqft per day
what is the maximum effluent loading rate for soil type 6 Correct
Ans - .2 gallon per sqft per day
what is the maximum depth of the infiltrative surface below the pipe
Correct Ans - 3 feet
