SEPTIC INSTALLER LATEST
TEST FOR
WASHINGTON STATE
(WOSSA)
How many Soil Type Descriptions are there? - ANSWERS-7 (Soil Type
Descriptions)
1-7
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : 12" < 18" - ANSWERS-(Soil Type: 1, 2
,3) - (Treatment Levels A, B, C, E)
1.) A - pressure with timed dosing
2.) B - pressure with timed dosing
3-6.) B - pressure with timed dosing
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : ≥ 18 < 24 - ANSWERS-(Soil Type: 1, 2
,3) - (Treatment Levels A, B, C, E)
1.) B - pressure with timed dosing
2.) B - pressure with timed dosing
3-6.) B - pressure with timed dosing
END OF
PAGE
1
, SEPTIC INSTALLER LATEST
TEST FOR
WASHINGTON STATE
(WOSSA)
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : ≥ 24 < 36 - ANSWERS-(Soil Type: 1, 2
,3)
1.) B - pressure with timed dosing
2.) C - pressure
3-6.) E - pressure
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : ≥ 36 < 60 - ANSWERS-(Soil Type: 1, 2
,3) - (Treatment Levels A, B, C, E)
1.) B - pressure with timed dosing
2.) E - pressure
3-6.) E - gravity
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : ≥ 60 - ANSWERS-(Soil Type: 1, 2 ,3) -
(Treatment Levels A, B, C, E)
1.) C - pressure
END OF
PAGE
2
, SEPTIC INSTALLER LATEST
TEST FOR
WASHINGTON STATE
(WOSSA)
2.) E - gravity
3-6.) E - gravity
The local health officer shall not approve designs for: - ANSWERS-(a)
Cesspools; or
(b) Seepage pits.
Septic tanks shall: - ANSWERS-Have at least two compartments with
the first compartment liquid volume equal to one-half to two-thirds of
the total liquid volume. This standard may be met by one tank with two
compartments or by two single compartment tanks in series.
Required Minimum Liquid Volumes of Septic Tanks: (Single Family
Residence) Number of Bedrooms: ≤ 3 - ANSWERS-Required Minimum
Liquid Tank Volume in Gallons:
900 gallons
END OF
PAGE
3
, SEPTIC INSTALLER LATEST
TEST FOR
WASHINGTON STATE
(WOSSA)
Required Minimum Liquid Volumes of Septic Tanks: (Single Family
Residence) Number of Bedrooms: 4 - ANSWERS-Required Minimum
Liquid Tank Volume in Gallons:
1000 gallons
Required Minimum Liquid Volumes of Septic Tanks: (Single Family
Residence) Number of Bedrooms: Each additional bedroom over 4 -
ANSWERS-Required Minimum Liquid Tank Volume in Gallons:
1000 gallons + 250 gallons Each additional bedroom over 4
Residential Volume of sewage tank: - ANSWERS-For OSS treating
sewage from a residential source, other than one single-family residence,
two hundred fifty gallons per bedroom with a minimum of one thousand
gallons
Non-residential volume of sewage tank: - ANSWERS-For OSS treating
sewage from a nonresidential source, three times the design flow
END OF
PAGE
4
TEST FOR
WASHINGTON STATE
(WOSSA)
How many Soil Type Descriptions are there? - ANSWERS-7 (Soil Type
Descriptions)
1-7
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : 12" < 18" - ANSWERS-(Soil Type: 1, 2
,3) - (Treatment Levels A, B, C, E)
1.) A - pressure with timed dosing
2.) B - pressure with timed dosing
3-6.) B - pressure with timed dosing
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : ≥ 18 < 24 - ANSWERS-(Soil Type: 1, 2
,3) - (Treatment Levels A, B, C, E)
1.) B - pressure with timed dosing
2.) B - pressure with timed dosing
3-6.) B - pressure with timed dosing
END OF
PAGE
1
, SEPTIC INSTALLER LATEST
TEST FOR
WASHINGTON STATE
(WOSSA)
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : ≥ 24 < 36 - ANSWERS-(Soil Type: 1, 2
,3)
1.) B - pressure with timed dosing
2.) C - pressure
3-6.) E - pressure
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : ≥ 36 < 60 - ANSWERS-(Soil Type: 1, 2
,3) - (Treatment Levels A, B, C, E)
1.) B - pressure with timed dosing
2.) E - pressure
3-6.) E - gravity
Treatment Component Performance Levels and Method of Distribution
(Vertical Separation in inches) : ≥ 60 - ANSWERS-(Soil Type: 1, 2 ,3) -
(Treatment Levels A, B, C, E)
1.) C - pressure
END OF
PAGE
2
, SEPTIC INSTALLER LATEST
TEST FOR
WASHINGTON STATE
(WOSSA)
2.) E - gravity
3-6.) E - gravity
The local health officer shall not approve designs for: - ANSWERS-(a)
Cesspools; or
(b) Seepage pits.
Septic tanks shall: - ANSWERS-Have at least two compartments with
the first compartment liquid volume equal to one-half to two-thirds of
the total liquid volume. This standard may be met by one tank with two
compartments or by two single compartment tanks in series.
Required Minimum Liquid Volumes of Septic Tanks: (Single Family
Residence) Number of Bedrooms: ≤ 3 - ANSWERS-Required Minimum
Liquid Tank Volume in Gallons:
900 gallons
END OF
PAGE
3
, SEPTIC INSTALLER LATEST
TEST FOR
WASHINGTON STATE
(WOSSA)
Required Minimum Liquid Volumes of Septic Tanks: (Single Family
Residence) Number of Bedrooms: 4 - ANSWERS-Required Minimum
Liquid Tank Volume in Gallons:
1000 gallons
Required Minimum Liquid Volumes of Septic Tanks: (Single Family
Residence) Number of Bedrooms: Each additional bedroom over 4 -
ANSWERS-Required Minimum Liquid Tank Volume in Gallons:
1000 gallons + 250 gallons Each additional bedroom over 4
Residential Volume of sewage tank: - ANSWERS-For OSS treating
sewage from a residential source, other than one single-family residence,
two hundred fifty gallons per bedroom with a minimum of one thousand
gallons
Non-residential volume of sewage tank: - ANSWERS-For OSS treating
sewage from a nonresidential source, three times the design flow
END OF
PAGE
4
