Septic Installer Test For Washington State
(WOSSA): Questions With Verified Solutions
ANSI Correct Ans - American National Standards Institute
BOD Correct Ans - biochemical oxygen demand, typically
expressed in mg/L.
CBOD Correct Ans - Carbonaceous Biochemical Oxygen
Demand, expressed in mg/L.
FC Correct Ans - Fecal Coliform, expressed in number of
colonies 100/ml.
LOSS Correct Ans - large on-site sewage system
NSF Correct Ans - Nation Sanitation Foundation International
O&G Correct Ans - Oils and Grease, component of sewage
typically originating from food stuffs (animal fats of vegetable oils)
expressed in mg/L.
RS&G Correct Ans - Recommended Standards and Guidance
SSAS Correct Ans - a subsurface soil absorption system
TAC Correct Ans - Technical Advisory Committee established
in WAC 247-272A-0400
TN Correct Ans - Total Nitrogen, expressed in mg/L.
TSS Correct Ans - Total Suspended Solids. A measure of the
total suspended solids in a given solution, expressed in mg/L.
,USEPA Correct Ans - United States Environmental Protection
Agency
Additive Correct Ans - a commercial product added to an on-
site sewage system intended to affect the performance or aesthetics
of an on-site sewage system
Approved Correct Ans - Acceptable to the authority having
jurisdiction. Local health officer or the department
BED Correct Ans - a soil dispersal component consisting of an
excavation with a width greater than 3 feet
Building Sewer Correct Ans - that part of the horizontal piping
of a drainage system which starts from the end of the building drain
and which receives the discharge of the building drain and conveys
it to a public sewer, private sewer, individual sewage disposal
system or other point of disposal. It begins two feet outside the
building wall and conveys sewage from the building drain to the
remaining portions of the on-site sewage system.
Cesspool Correct Ans - a covered hole or pit for receiving
drainage or sewage, as from a house allowing liquid to seep into the
surronding rock or soil
Conforming System Correct Ans - an on-site sewage system of
component meeting rules of: New construction requirements
Approved and installed within previous requirements
Permitted by WAC-246-272A-0420
Cover Material Correct Ans - Soil placed over dispersal
component, made up of mineral material with no greater than 10%
,organic content. Cover may contain organic surface material, an
organic landscaper to help reduce and contain soil erosion.
Cuts and Banks Correct Ans - a naturally occurring or
artificially formed slope greater than one hundred percent (forty-
five degrees) and extending vertically at least five from the toe of the
slope to top of the slope.
Department Correct Ans - Washington State Department of
Health
Designer Correct Ans - Person who matches site and soil
characteristics with approved components
Design Flow Correct Ans - Means the maximum volume of
sewage a residence, structure or other facility is estimated to
generate in a twenty-four hour period. It incorporates both an
operating capacity and a surge capacity for the system during
periodic heavy use events. The sizing and design of a on-site sewage
system component is based on the design flow.
Development Correct Ans - The creation of a residence,
structure, facility, subdivision, area, or similar activity resulting in
the production of sewage.
Disinfection Correct Ans - The process of destroying pathogens
in sewage through the application of chlorination, ultra-violent light,
or ozonation.
Distribution Technology Correct Ans - any arrangement of
equipment and/or material that distributes sewage within and on-
site sewage system.
, Drainfield Correct Ans - subsurface soil absorption system,
and soil dispersal component
Drainrock Correct Ans - cleaned washed gravel or crushed
rock ranging in size from 3/4" to 2.5", and containing no more than
two percent by weight passing a US No.8 sieve and no more than
one percent by weight passing through a US No. 200 Sieve.
Effluent Correct Ans - liquid waste discharged to a septic tank
or other on-site sewage system
Expanding Clay Correct Ans - means a clay soil with the
mineralogy of clay particles. Clay particles expand when absorbing
water
expansion Correct Ans - a change in residence, facility or site
that results in the quantity of sewage to exceed the original design
Extremely gravely Correct Ans - soils with 60% or more, but
not less than 90% rock fragments by volume.
Failure Correct Ans - a condition of an on-site sewage
component that threatens the public health by inadequately treating
the sewage, or creating a potential direct or indirect contact
between sewage and the public.
Fecal coliform bacteria Correct Ans - bacteria found in the
intestinal tracts of warm-blooded animals that are cultured in
standard tests. Generally expressed as colonies per 100 ml.
Gravely Correct Ans - Soils with 15% or more, but less than
35% rock fragments by volume.
(WOSSA): Questions With Verified Solutions
ANSI Correct Ans - American National Standards Institute
BOD Correct Ans - biochemical oxygen demand, typically
expressed in mg/L.
CBOD Correct Ans - Carbonaceous Biochemical Oxygen
Demand, expressed in mg/L.
FC Correct Ans - Fecal Coliform, expressed in number of
colonies 100/ml.
LOSS Correct Ans - large on-site sewage system
NSF Correct Ans - Nation Sanitation Foundation International
O&G Correct Ans - Oils and Grease, component of sewage
typically originating from food stuffs (animal fats of vegetable oils)
expressed in mg/L.
RS&G Correct Ans - Recommended Standards and Guidance
SSAS Correct Ans - a subsurface soil absorption system
TAC Correct Ans - Technical Advisory Committee established
in WAC 247-272A-0400
TN Correct Ans - Total Nitrogen, expressed in mg/L.
TSS Correct Ans - Total Suspended Solids. A measure of the
total suspended solids in a given solution, expressed in mg/L.
,USEPA Correct Ans - United States Environmental Protection
Agency
Additive Correct Ans - a commercial product added to an on-
site sewage system intended to affect the performance or aesthetics
of an on-site sewage system
Approved Correct Ans - Acceptable to the authority having
jurisdiction. Local health officer or the department
BED Correct Ans - a soil dispersal component consisting of an
excavation with a width greater than 3 feet
Building Sewer Correct Ans - that part of the horizontal piping
of a drainage system which starts from the end of the building drain
and which receives the discharge of the building drain and conveys
it to a public sewer, private sewer, individual sewage disposal
system or other point of disposal. It begins two feet outside the
building wall and conveys sewage from the building drain to the
remaining portions of the on-site sewage system.
Cesspool Correct Ans - a covered hole or pit for receiving
drainage or sewage, as from a house allowing liquid to seep into the
surronding rock or soil
Conforming System Correct Ans - an on-site sewage system of
component meeting rules of: New construction requirements
Approved and installed within previous requirements
Permitted by WAC-246-272A-0420
Cover Material Correct Ans - Soil placed over dispersal
component, made up of mineral material with no greater than 10%
,organic content. Cover may contain organic surface material, an
organic landscaper to help reduce and contain soil erosion.
Cuts and Banks Correct Ans - a naturally occurring or
artificially formed slope greater than one hundred percent (forty-
five degrees) and extending vertically at least five from the toe of the
slope to top of the slope.
Department Correct Ans - Washington State Department of
Health
Designer Correct Ans - Person who matches site and soil
characteristics with approved components
Design Flow Correct Ans - Means the maximum volume of
sewage a residence, structure or other facility is estimated to
generate in a twenty-four hour period. It incorporates both an
operating capacity and a surge capacity for the system during
periodic heavy use events. The sizing and design of a on-site sewage
system component is based on the design flow.
Development Correct Ans - The creation of a residence,
structure, facility, subdivision, area, or similar activity resulting in
the production of sewage.
Disinfection Correct Ans - The process of destroying pathogens
in sewage through the application of chlorination, ultra-violent light,
or ozonation.
Distribution Technology Correct Ans - any arrangement of
equipment and/or material that distributes sewage within and on-
site sewage system.
, Drainfield Correct Ans - subsurface soil absorption system,
and soil dispersal component
Drainrock Correct Ans - cleaned washed gravel or crushed
rock ranging in size from 3/4" to 2.5", and containing no more than
two percent by weight passing a US No.8 sieve and no more than
one percent by weight passing through a US No. 200 Sieve.
Effluent Correct Ans - liquid waste discharged to a septic tank
or other on-site sewage system
Expanding Clay Correct Ans - means a clay soil with the
mineralogy of clay particles. Clay particles expand when absorbing
water
expansion Correct Ans - a change in residence, facility or site
that results in the quantity of sewage to exceed the original design
Extremely gravely Correct Ans - soils with 60% or more, but
not less than 90% rock fragments by volume.
Failure Correct Ans - a condition of an on-site sewage
component that threatens the public health by inadequately treating
the sewage, or creating a potential direct or indirect contact
between sewage and the public.
Fecal coliform bacteria Correct Ans - bacteria found in the
intestinal tracts of warm-blooded animals that are cultured in
standard tests. Generally expressed as colonies per 100 ml.
Gravely Correct Ans - Soils with 15% or more, but less than
35% rock fragments by volume.
