Installer I Study Guide Exam Questions And 100% Actual Answers.
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Course
OSSF Installer 1
Institution
OSSF Installer 1
Site Characteristics - Answer existing structures; slopes; wells; streams influence system design
Soil Characteristics - Answer 40 million bacterial cells in a single gram of soil Healthy soil is living and breathing and packed with microbes that breakdown pathogens
vertical separation ...
Installer I Study Guide Exam Questions
And 100% Actual Answers.
Site Characteristics - Answer existing structures; slopes; wells; streams influence system design
Soil Characteristics - Answer 40 million bacterial cells in a single gram of soil Healthy soil is living and
breathing and packed with microbes that breakdown pathogens
vertical separation - Answer dept of soil on property
restrictive layer - Answer bedrock, groundwater, impermeable layer, dept of water will no longer seep
into soil
Conventional Gravity System - Answer consists of 3 parts, Septic Tank; Drain-field; soil benighted.
requires min 3 ft of native undisturbed drain soil benighted the drain field - clean filter every 6-12 mths
Sludge layer - Answer top layer in septic system
Scum layer - Answer bottom layer in the septic system
effluent - Answer clear liquid between the sludge & scum layers
Distribution box - Dbox - Answer equal distribution of effluent. Is attached to the lateral drain lines,
effluent flows out through small holes into the surrounding soil where aerobic or oxygen loving bacterial
& other microbes treat the wastewater by removing pathogens
Pressurized System - Answer wastewater is pumped to a certain area of the property Pressurized
System distributes the wastewater, vertical separation is 2-3 ft
Alarm float - Answer 3rd and highest float, if the pump fails, and has too much wastewater, the
wastewater rises and sounds the alarm on. some pumps use a transducer rather than an alarm pump
, redundant float - Answer helps to turn off the pump if the water level drops too low, or have adequate
wastewater to cover the pump
on/off float - Answer turns the pump on as the water level rises - the effluent is dossed every few hours
to spread out the lateral drains into the drain field, water level stops the pump - in order for the drain
field to dry out between doses
Mound system - Answer specially engineered sand 1' - 2'
Sand Filtered System - Answer box of engineered sand and gravel, then is pumped out to a drain field
Conventional onsite wastewater treatment system - Answer consists of a two chamber treatment tank
and a drain-field or leach-field. The treatment tank separates the material that will either float or sink.
Typically the septic tank volume for a conventional tank and onsite effluent disposal system (such as a
drain field) is estimated at a minimum of 1000 gallons or 1.5x average total daily wastewater flow.
Preliminary Site Check - Answer check to see if your lot appears to be large enough for a conventional
septic tank and drainage system
Lot size - Answer lot must be at least 3/4 of an acre.
setbacks - Answer layout of typical system on your plat map and see if your system meets the required
setbacks
Utility Companies - Answer Phone, Gas, Cable, Electric & water - call before you dig. If you did and
damage utilities without notifying the utility company involved, you may be responsible for the cost of
repairs.
Sewer pipe - Answer sewer pipe shall be installed in a practical alignment and uniform slope, with
watertight connections. The sewer line shall be a minimum of 3 inches and in no case less than the size
of the building drain to which it is connected.
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