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On-Site Sewage Facility (OSSF) Rules Compilation


Quiz Questions

1.The bacterial decomposition and stabilization of sewage in the presence of free oxygen is called ________________________.
Aerobic digestion
Anaerobic digestion
2. Borehole is a drilled hole of four feet or greater in depth and one to three feet in diameter.
True
False
3.A sewage collection, treatment, and disposal system designed to serve two or more sewage-generating units on separate legal tracts where the total combined flow from all units does not exceed 5,000 gallons per day is called a _______________________.
Cluster system
Composting toilet
4.Grease interceptors are floatation chambers where grease floats to the water surface and is retained while the clearer water underneath is discharged.
True
False
5._____________________ is a tank placed ahead of a treatment unit that functions as an interceptor for materials such as plastics, clothing, hair, and grease that are potentially harmful to treatment unit components.
Pretreatment tank
Post-treatment tank
6.Scum is a mass of organic or inorganic matter which floats on the surface of sewage.
True
False
7.A semi-liquid mass of partially decomposed organic and inorganic matter which settles at or near the bottom of a receptacle containing sewage is termed as ________________.
Sludge
Soil
8.The site evaluator shall either drill two soil borings or excavate two backhoe pits at opposite ends of the proposed disposal area to determine the characteristics of the soil.
True
False
9. The pipe from the sewer stub out to the treatment system should be constructed of steel & plastic.
True
False
10.All septic tanks shall be divided into two or three compartments by the use of baffles or by connecting two or more tanks in a series.
True
False
11.Two or more tanks are arranged in series to attain the required liquid volume. The first tank in a two-tank system shall contain at least one-half the required volume. The first tank in a three-tank system shall contain at least one-third of the total required volume, but no less than 500 gallons.
True
False
12. The septic tank shall be designed and constructed so that all joints, seams, component parts, and fittings______________________ from entering the tank, and ____________________ from exiting the tank, except through designed inlet and outlet openings.
Prevent wastewater, prevent groundwater
Prevent groundwater, prevent wastewater
13.Which formula is used for leaching chambers without water saving devices?
L = 0.75A/(W+2)
L = 0.6A/(W+2)
14.The drainfield layout shall consist of a matrix of small-diameter pressurized lines, buried at least six inches deep, and pressure reducing emitters spaced at a maximum of 30-inch intervals.
True
False
15.Pump tanks may not be necessary when the septic tank outlet is at a lower elevation than the disposal field or for systems that require pressure disposal
True
False
16.If condensate lines are plumbed directly into an OSSF, the increased water volume must be accounted for (added to the usage rate) in the system planning materials.
True
False
17.A site evaluator should possess a current license from the customers.
True
False
18.An installer should construct the OSSF that has been authorized by the permitting authority for the specific location identified in the site evaluation.
True
False
19.An apprentice possesses a current registration from the ____________________.
Customers
Executive director
20.A maintenance provider should satisfy the requirements of the maintenance contract between the homeowner of the OSSF system and the maintenance provider.
True
False