Septic Installer Test for Washington State (WOSSA)
Exam Questions with Verified Detailed Answers |
Latest Update 2026-2027 | Graded A+ | 100% Correct
Fecal coliform bacteria --- correct answer ---bacteria found in the intestinal tracts of
warm-blooded animals that are cultured in standard tests. Generally expressed as colonies
per 100 ml.
Gray Water --- correct answer ---Sewage from bathtubs, showers, bathroom sinks,
kitchen sinks, washing machines, and dishwashers.
Ground water --- correct answer ---Subsurface water in the zone of saturated soils,
seasonally, permanently, or as the result of the tides.
Gravely --- correct answer ---Soils with 15% or more, but less than 35% rock fragments
by volume.
industrial waste --- correct answer ---Waste from production of consumer goods, mining,
agriculture and petroleum extraction and refining
Infiltrative surface --- correct answer ---Surface within a treatment component or soil
dispersal component to which effluent is applied and through which effluent moves into
original, undisturbed soil or other porous treatment media.
,Installer --- correct answer ---a person approved by the local health office to install onsite
sewage systems or components
Massive structure --- correct answer ---the condition of a soil layer in which the layer
appears as a coherent of solid mass not separated into peds of any kind
Holding tank sewage system --- correct answer ---an on-site sewage system that a
holding tank with no discharge outlet
hydraulic loading rate --- correct answer ---the amount of effluent applied to a given
treatment step, expressed as gallons per square foot per day, (gal./sq.ft./day)
Moderated structure --- correct answer ---Well- formed distinct peds evident in
undisturbed soil. When disturbed, soil material parts into mixture of whole peds, broken
peds, and material that is not in peds.
Monitoring --- correct answer ---Periodic or continuous surveillance of on-site sewage
system, which is performed by observations and measurements, to determine if the
system is functioning as intended and if system is in need of maintenance.
,On-site sewage system (OSS) --- correct answer ---An integrated system of components ,
located on or nearby the property it serves. that conveys, stores, treats, and/or provides
subsurface soil treatment and dispersal of sewage. It consists of a collection system, a
treatment component or treatment sequence, and a soil dispersal component.
Operating capacity --- correct answer ---the average daily volume of sewage an OSS can
treat and disperse on a sustained basis. The operating capacity, which is lower than design
flow, is an integral part of the design and is used as an index in OSS monitoring.
Ordinary High Water Mark --- correct answer ---The point on the bank or shore where
water is present often enough so that the upland begins to look different from the lake or
stream bed.
Person --- correct answer ---Any individual, partnership, corporation, association,
government or governmental subdivision or agency or other entity:
Planned Unit Development --- correct answer ---A planned combination of diverse land
uses, such as housing, recreation, and shopping, in one contained development or
subdivision.
Platy structure --- correct answer ---Thin, flat plates of soil that lie horizontally. Usually
found in compacted soil. This type of soil will impede the vertical movement of water.
, Thank you for Purchasing this exam
Study Guide. We provide high-quality
academic materials to help students
excel in exams. Our other Services
include but not limited to: academic
research, University & College
assignments writing, essay writing,
Online Classes, and research projects.
Our services are reliable, affordable,
and plagiarism-free. All the Best in
your Exam. For more information;
Contact us at:
or
0R +254
741484450
Exam Questions with Verified Detailed Answers |
Latest Update 2026-2027 | Graded A+ | 100% Correct
Fecal coliform bacteria --- correct answer ---bacteria found in the intestinal tracts of
warm-blooded animals that are cultured in standard tests. Generally expressed as colonies
per 100 ml.
Gray Water --- correct answer ---Sewage from bathtubs, showers, bathroom sinks,
kitchen sinks, washing machines, and dishwashers.
Ground water --- correct answer ---Subsurface water in the zone of saturated soils,
seasonally, permanently, or as the result of the tides.
Gravely --- correct answer ---Soils with 15% or more, but less than 35% rock fragments
by volume.
industrial waste --- correct answer ---Waste from production of consumer goods, mining,
agriculture and petroleum extraction and refining
Infiltrative surface --- correct answer ---Surface within a treatment component or soil
dispersal component to which effluent is applied and through which effluent moves into
original, undisturbed soil or other porous treatment media.
,Installer --- correct answer ---a person approved by the local health office to install onsite
sewage systems or components
Massive structure --- correct answer ---the condition of a soil layer in which the layer
appears as a coherent of solid mass not separated into peds of any kind
Holding tank sewage system --- correct answer ---an on-site sewage system that a
holding tank with no discharge outlet
hydraulic loading rate --- correct answer ---the amount of effluent applied to a given
treatment step, expressed as gallons per square foot per day, (gal./sq.ft./day)
Moderated structure --- correct answer ---Well- formed distinct peds evident in
undisturbed soil. When disturbed, soil material parts into mixture of whole peds, broken
peds, and material that is not in peds.
Monitoring --- correct answer ---Periodic or continuous surveillance of on-site sewage
system, which is performed by observations and measurements, to determine if the
system is functioning as intended and if system is in need of maintenance.
,On-site sewage system (OSS) --- correct answer ---An integrated system of components ,
located on or nearby the property it serves. that conveys, stores, treats, and/or provides
subsurface soil treatment and dispersal of sewage. It consists of a collection system, a
treatment component or treatment sequence, and a soil dispersal component.
Operating capacity --- correct answer ---the average daily volume of sewage an OSS can
treat and disperse on a sustained basis. The operating capacity, which is lower than design
flow, is an integral part of the design and is used as an index in OSS monitoring.
Ordinary High Water Mark --- correct answer ---The point on the bank or shore where
water is present often enough so that the upland begins to look different from the lake or
stream bed.
Person --- correct answer ---Any individual, partnership, corporation, association,
government or governmental subdivision or agency or other entity:
Planned Unit Development --- correct answer ---A planned combination of diverse land
uses, such as housing, recreation, and shopping, in one contained development or
subdivision.
Platy structure --- correct answer ---Thin, flat plates of soil that lie horizontally. Usually
found in compacted soil. This type of soil will impede the vertical movement of water.
, Thank you for Purchasing this exam
Study Guide. We provide high-quality
academic materials to help students
excel in exams. Our other Services
include but not limited to: academic
research, University & College
assignments writing, essay writing,
Online Classes, and research projects.
Our services are reliable, affordable,
and plagiarism-free. All the Best in
your Exam. For more information;
Contact us at:
or
0R +254
741484450
