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39 Cards in this Set
- Front
- Back
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Private sewage disposal systems in Alberta are regulated by |
Private Sewage Disposal Systems Regulation AR229/97 |
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The maximum volume of sewage to be produced and disposed on a property is |
25 cu metres (5500 gal) |
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Sewage systems over what size require an engineer |
5.7 cu metres (1250 gal) |
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A sewage system over 25 cu metre must meet the standard satisfactory to the ________ |
Administrator |
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On site water treatment systems start at a point _____ upstream of the first treatment component but not include the building drain |
1.8m (6ft) |
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Who may a permit issuer issue a permit to in the private sewage discipline |
A private sewage installer A restricted private sewage installer of holding tanks An owner who resides in the single family home An owner of a farm |
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What gases may be present in sewage |
Hydrogen sulphide Methane CO CO2 Nitrogen Gasoline and other vapours |
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How far from the bottom of the sewer shaft shall a ventilation tube be placed and for how long before entry |
No more than 6in and for 15 min |
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The three primary treatment components that are most common are |
Septic tank or chamber Effluent chamber Holding tank |
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What bacteria is used in septic tanks |
Anaerobic |
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What is the minimum time that sewage must be held in holding compartment |
24 hr |
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Compartments that receive raw sewage are known as |
Working compartments or septic chambers |
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The material that floats to the top of the chamber is called |
Scum |
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The material that settles to the bottom of the chamber is called |
Sludge |
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The resulting liquid is called |
Effluent |
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Raw sewage must be retained for a minimum of |
24 hours |
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The chamber must be a minimum depth of |
900mm (36in) |
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The maximum elevation difference between the outlet and the invert of the inlet is |
75mm (3in) |
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The septic chamber must be how much longer than it’s width |
2 to 3 |
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The minimum travel length from inlet to outlet is |
1200mm (48in) |
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The chamber must contain an airspace or scum capacity above the liquid level |
225mm (9in) |
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What must be installed on both the inlet and outlet pipes in a septic chamber |
Baffles, Tee wyes or 90 elbows |
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Baffles, tee wyes must be short enough to extend no less than ______mm and no more than ______mm below the liquid level |
75mm (3in) to 125mm (5in) |
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If a Tee wye is used the minimum space above the open side of the fitting is |
25mm (1in) |
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What is the minimum size opening for a manhole on a two manhole tank |
16in |
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The minimum size manhole for a single manhole tank is ______ with a minimum clearance over each side of the chamber of _____ |
24in 12in |
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Joints between manhole and manhole extensions should be |
Watertight sealed |
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To prevent accidents, all tank lids must weigh at least |
65lb |
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If a tank uses a fibreglass extension, the lid must be |
Fastened with stainless steel fasteners |
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Effluent discharged from he effluent chamber must be _______ into a field and not trickled |
Dosed |
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What is the minimum size sewage holding tank |
1000gal |
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The minimum size of a working chamber is |
740 gal |
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Sizing of septic tank is not based upon occupancy but by the |
Number of bedrooms and Peak demand |
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Sewage/septic tanks that are buried less than _____ shall be covered with |
48in R8 insulation |
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If a sludge layer is more than ____ or then scum layer is more than _____ then the tank should be cleaned |
18in and 9in |
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The prime function of the septic chamber is to |
Clarify wastewater |
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What type of bacteria is found in the septic tank |
Anaerobic |
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Effluent can be discharged to a field by either |
A siphon or pump |
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How is a septic tank activated |
By using 5 gal of sewage per person and warm water |
