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Georgia Commercial Contractor Septic Exam Study Guide questions and correct answers (elaborations) with 100% accurate , verified , latest fully updated , 2024/2025 ,already passed , graded a+, complete solutions guarantee distinctions rationales| 5-star r
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Georgia Commercial Contractor Septic Exam Study Guide questions and correct answers (elaborations) with 100% accurate , verified , latest fully updated , 2024/2025 ,already passed , graded a+, complete solutions guarantee distinctions rationales| 5-star rating

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  • August 5, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • georgia commercial contractor septic exam study gu

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  • Commercial Construction
  • Commercial Construction

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Georgia Commercial Contractor Septic Exam Study
Guide
How are residential absorption fields sized? - ANS-According to peak daily sewage flow. 150
gallons per bedroom is used to estimate the number of gallons per day of sewage flow.

How do Siphons work in dosing tanks? - ANS-As the dosing tank fills, head pressure increases
in the tank to a point that will force the effluent thru the siphon which is a specially designed
trap, creating suction in the discharge line that empties the contents of the dosing tank to the
level of the siphon bell and sniff hole. Equilibrium is then re-established in the line until the water
level rises to the level that the process starts all over again.

How far below the ground can a dosing tank lid be buried? - ANS-No more than 12"

How far into the liquid depth of the septic tank shall T's extend? - ANS-Minimum of 25% and
Maximum of 50%.

How is dosing accomplished? - ANS-By using pumps or siphons.

How many compartments must a Septic Tank have? - ANS-2

How many pumps or siphons are required for a system with greater than 500 ft but less than
1000 linear feat of field lines? - ANS-1

How many pumps or siphons are required for a system with more than 1000 ft of field lines? -
ANS-2 - Must have alternating pumps or siphons with alternating absorption fields.

How much lower must the invert of the Outlet Tee be compared to the invert of the Inlet Tee? -
ANS-2 Inches

If a Garbage Grinder/Garbage Disposal is to be used how much larger must the Septic Tank be
sized? - ANS-Tank capacity shall be increased by 50%. Example: A 4 bedroom home would
normally require a 1000 gal tank, if a garbage disposal is installed a 1500 gal tank would be
required.

If a septic tank is converted into a grease trap where should the tees extend to? - ANS-Within
12 inches of the bottom, and must extend well above the water line on the top.

If Septic Tanks are trained together how much volume must the first tank hold? - ANS-At least
2/3rds of the volume of the 24 hour flow.

, Inlet and Outlet T's are required to meet what specifications? - ANS-4" , PVC, ASTM 3034
Rated

Minimum 28 day comprehensive strength of poured in place or pre-cast cement tanks? -
ANS-4000 pounds per square inch.

Systems with wastewater flows that contain chemicals that may be harmful to the environment
(such as petroleum products, pesticides, or industrial processing agents) shall be referred to
whom? - ANS-Georgia Environmental Protection Division's Underground Injection control
Program.

The treatment capacity for all septic tanks shall be sized for what volume? - ANS-The daily (24
hour) peak volume of the facility being served.

Total Dynamic Head - ANS-The elevation difference between lowest water level in the tank and
the elevation of the discharge outlet plus the friction loss that occur in the pressure piping
network.

True or False, All dosing tanks must have an operating liquid capacity of 60% to 75% of the
interior volume of the absorption lines to be dosed? - ANS-True

True or False, All dosing tanks must have switches and alarms to notify the owner of a
malfunction? - ANS-True

True or False, Any contractor installing an ATU must be must be authorized by the
manufacturer? - ANS-True - The contractor must be able to show proof of the authorization.

True or False, ATU's must be approved by the department or by using a pretreatment unit that
has been approved by the Environmental Protection Division for that specific application? -
ANS-True - If approved by EPD correspondence must be provided. In either case the
wastewater flow volume and strength should be reviewed by a Registered Engineer as well as
an authorized representative of the product manufacturer. Written correspondence from the
designing engineer and product manufacturer is required.

True or False, Dosing tanks have no requirements for length, width, or shape? - ANS-True

True or False, Dosing tanks may be a single chamber but if a 2 chamber tank is used it must
have two 4 inch holes located no more than 12 inches from the tank bottom? - ANS-True

True or False, Dosing tanks using a siphon are not required to have reserve capacity? -
ANS-True

True or False, Dosing tanks using pumps should have a designed reserve capacity to allow
adequate time for a repair in case of a pump failure? - ANS-True

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