Private sewage Disposal System Flashcards
(146 cards)
1
Q
a septic tank into the subsurface disposal field, or seepage pits
A
PRIVATE SEWAGE DISPOSAL
2
Q
a watertight receptacle which receives discharge of a sanitary plumbing system
A
SEPTIC TANK
3
Q
a loosely lined excavation in the ground which receives the discharge of a septic tank
A
SEEPAGE PIT
4
Q
a non-watertight lined excavation in the ground which receives the discharge of a sanitary drainage system or part there of
A
CESSPOOL
5
Q
a cesspool that is not watertight
A
LEECHING CESSPOOL
6
Q
an outhouse or structure used for the deposition of excrement
A
PRIVY
7
Q
a pit beneath a privy where excrement collects
A
PRIVY VAULT
8
Q
_______ are conducted to determine the absorption qualities of questionable soils
A
PERCOLATION TEST
9
Q
What are the basis of DENR in approving if the bldg sewer may be connected to private sewage disposal system?
A
Location
Soil porosity
Ground water level
(LSG)
10
Q
PD 856
A
SANITATION CODE OF THE PHILIPPINES
11
Q
Septic tanks design shall produce a _________
A
clarified effluent
12
Q
What is the minimum compartments of septic tank?
A
2
13
Q
what is the recommended minimum compartment of septic tanks by LGU’s?
A
3
14
Q
What is the liquid depth of septic tanks?
A
0.6 m-1.8m
15
Q
What is the minimum inlet compartment of a septic tank?
A
2/3 of the septic tank
16
Q
What is the minimum capacity of the first compartment of a septic tank?
A
2 cu.m
17
Q
What is the minimum width of a septic tank?
A
0.90 m
18
Q
What is the minimum length of the first compartment of a septic tank?
A
1.5m
19
Q
What is the maximum outlet compartment of a septic tank?
A
1/3 of the septic tank
20
Q
What is the minimum capacity of the secondary compartment of septic tank?
A
2 cu.m
21
Q
What is the minimum length of the secondary compartment if septic tank has over 6 cu.m capacity?
A
1.5 m
22
Q
What is the minimum size of the inlet and outlet pipe for septic tank?
A
Same as the size of connecting sewer pipe
23
Q
What is the minimum number of manholes of a septic tank?
A
2
24
Q
What is the minimum dimension of a manhole?
A
508 mm
25
How many **manholes are over the inlet compartment**?
1 manhole
26
How many **manholes are over the outlet compartment**?
1
27
Add 1 more manhole above the baffle wall if the first compartment exceeds _____ in length
3.7 m
28
What is the vertical clearance of **inlet invert pipe** above **outlet invert pipe** for septic tank?
50.8 mm (2")
29
What is the vertical clearance of the **cover** of the septic tank above the **back vent opening**?
50.88 mm (2")
30
How much is the **extension of inlet and outlet pipe** or baffle partitions between compartments above the **water surface**?
101.6 mm (4")
31
What is the minimum **vertical leg** of the inlet and outlet fitting?
104.6 mm (4.1")
32
What is the minimum **inverted fitting** installed in the inlet compartment side of the baffle??
104.6 mm (4.1")
33
What is the minimum **horizontal dimension** of the **baffle type fitting** measured at the inlet and outlet pipe inverts?
106.6 mm (4.2")
34
How much is the **extension of side walls** above the liquid depth?
228.6 (9")
35
How much is the **extension of the inlet and outlet pipe** or baffle **below the water surface**?
304.8 mm (12")
36
What is the minimum **earth load support** of septic tank cover when the maximum coverage **does not exceed 9 m**?
14.4 kpa
37
What is the minimum **bituminous coating extension below the water line** for concrete septic tanks and shall cover all of the internal areas above that point?
101.6 mm (4")
38
What is the minimum **wall thickness** of any **steel septic tank**?
Gauge 12 US (2.8mm)
39
What are prohibited septic tanks and baffles?
Wooden septic tanks and baffles
40
what is the **minimum area of trench bottom** for disposal fields?
14 sqm
41
what is the **sidewall area** of disposal fields that **may be added to the trench bottom**?
304.8 mm to 914.4 mm
42
What is the **maximum depth of excavation within a water table** for a leach line or leach bed?
1.5 m
43
what is the **raking depth of trenches** before placing filter materials on drain lines, to remove compacted surfaces?
25.4mm (1")
44
what is the ***size of clean stone, gravel, slag, or similar filter material** for a disposal field?
19.1 mm to 63.5 mm (3/4" to 2 1/2")
45
What are approved **filter materials** put **above the drain pipe** to **prevent closure of voids** with earth backfill?
Untreated building paper, Straw, similar porous material
46
What is **staked in the trench** to the depth of the filter material as support for drain tile or flexible pipe which will **maintain alignment**?
GRADE BOARD
47
How much is the **termination of filter material** when seepage pits are used in combination with disposal fields?
1.5 m
48
What is needed for two or more drain lines to **receive lateral lines**?
DISTRIBUTION BOX
49
what is required if quantity of sewage **exceeds 152.4 linear meter**?
DOSING TANK
50
What is the **interval of discharge of dosing tank** via automatic siphon pump?
3 hrs or 4 hrs
51
What is the **dosing capacity** of a dosing tank at one time?
60% to 75%
52
How many siphons or pumps required if total length of pipe **exceeds 304.8 m,** each serving 1/2 of the reaching field?
2 siphons or pumps
53
What is the minimum number of **drain lines per disposal field**?
1
54
What is the **maximum length of each line** of the disposal field?
30.5 mm
55
what is the **minimum bottom width of trench** for disposal field?
457.2 mm
56
What is the **maximum bottom width of trench** for disposal field?
914.4 mm
57
What minimum **spacing of distribution lines** of disposal fields, **center-to-center**?
1.8m
58
What is the **minimum depth cover of line** of disposal field?
304.8mm
59
What is the **preferred depth of earth cover of lines** of disposal field?
457.2mm
60
what is the **minimum grade of lines** of disposal field?
level
61
What is the **maximum grade of lines** of disposal field?
25 mm/m
62
What is the minimum **filter material under drain lines** of disposal field?
304.8 mm
63
What is the **minimum filter material over drain lines** of disposal field?
50.8 mm
64
What is the **minimum distance of Ieaching beds** in a disposal field?
1.20 m
65
What is the **maximum distance of perimeter of leaching bed** to a distribution drain line?
0.90 m
66
On **sloping grounds**, to prevent excessive line slope, leach lines or beach beds shall be _________
stepped
67
What is the **shape of a seepage pit**?
circular/circle/round
68
What is the **extension of vented leg fitting** below the inlet fitting?
304.8 mm
69
What is the **minimum diameter of seepage pits**?
2.2m
70
Approval shall be obtained for excavated seepage pits with diameters greater than _________
1.8 m
71
What is the **thickness of concrete wall for seepage pits**?
101.6 mm
72
When to have **chamfered matching ends** of bricks on blocks for seepage pits?
greater than 304.8mm
73
What is the **minimum depth of clean 19.1 mm gravel of a rock** in the excavation voids behind the brick, block, or concrete liner?
152.4 mm
74
What is the **minimum compressive strength** of brick or blocks in seepage pits?
17225 kPa on 2500 psi
75
What is the **minimum sidewall of seepage pits**?
3 m
76
What is the **maximum depth of excavation within a water table** from a seepage pit?
3 m
77
What is the **thickness of cement mortar of the arch or dome** of any seepage pit, extending to at least 152.4 mm beyond the sidewalls?
50.8 mm
78
What is the **earth load design** of seepage pits?
19.2 kpa
79
What is the **depth of top or arch or cover** below the surface of the ground?
457.2 mm-1.2 m
80
What is the **allowable discharge fitting** when using a one or two piece concrete slab cover inlet?
1/4 bend fitting
81
Shall be considered only as a **temporary expedient** pending to construction of a public sewer
CESSPOOL
82
What is the **minimum sidewall** of cesspool?
6.1 m
83
What is the **vertical clearance of the inIet above the outlet** when overflow cesspools or seepage pits are added to existing installations?
152.4 mm
84
What is the **clear height of tunnel** above the distribution pipe?
0.6m
85
What is the **maximum length of tunnel**?
1/2 or 2.4 m depth of trench
86
trenches shall be back-filled in thin layers of _____ above the pipe with clean earth
0.3 m
87
what is the distance within property line that every abandoned bldg shall be capped or plugged?
1.5 m
88
What is the maximum days from **connecting to the public sewer** that the abandoned facility shall be filled etc.?
30 days
89
What is the **minimum horizontal distance** between any part of the leaching system when disposal fields and/or seepage pits are installed in **sloping ground**?
4.6 m
90
What is the clearance of **drainage piping from domestic supply wells**?
15.2 m
91
What is the **allowable reduction in distance** when drainage piping is construction of materials approved for use within a bldg ?
7.6 m
92
What is the waste flow rates for disposal facilities indicated **with a dishwashing machine**?
6 gallons (22.7L)
93
What is the waste flow rates for disposal facilities indicated **without a dishwashing machine**?
5 gallons (18.9L)
94
What is the waste flow rates for disposal facilities for **single service kitchen**?
2 gallons (7.6L)
95
What is the waste flow rates for disposal facilities of a **food waste disposer**?
1 gallon (3.8L)
96
What is the retention time for disposal facilities of **commercial kitchen waste dishwasher**?
2.5 hrs
97
What is the retention time for disposal facilities of **single service kitchen single serving**?
1.5 hrs
98
What is the retention time for disposal facilities of **sand-silt-oil**?
2 hrs
99
What is the retention time for disposal facilities of **lint-silt(laundry)**?
2 hrs
100
What is the storage factor for disposal facilities
101
What is the storage factor disposal facilities for **fully equipped commercial kitchen for 8 hrs**?
1
102
What is the storage factor disposal facilities for **fully equipped commercial kitchen for 16 hrs**?
2
103
What is the storage factor disposal facilities for **fully equipped commercial kitchen for 24 hrs**?
3
104
What is the storage factor for disposal facilities of **single service kitchen**?
1.5
105
What is the storage factor for disposal facilities of **self-serve auto washers**?
1.5
106
What is the storage factor for disposal facilities of **employee-operated auto washers**?
2
107
What is the storage factor for disposal facilities of **laundries and laundromats**?
1.5
108
The oldest type of public sewer that **conveys both storm water and sanitary waste.** This type is already obsolete and no longer allowed by sanitary authorities
COMBINATION PUBLIC SEWER
109
Type of public sewer facility that carries **regular sanitary wastes only**. It terminates in a modern sewage dispersal plant. Rainwater is not permitted to enter.
SANITARY SEWER
110
A type of sanitary sewer that **conveys sanitary waste to a dispersal plant,** commonly made of concrete pipe laid underground.
INTERCEPTING SEWER or TRUNK LINE SEWER
111
Type of sanitary sewer classified as an **intercepting sewer branch**, constructed of vitrified clay or concrete pipe laid in an open trench.
TRIBUTARY SEWER or CONTRIBUTING SEWER
112
Kind of public sewer line that **carries storm water** which terminates in a natural drain such as canals, lakes, or rivers
STORM DRAIN
113
Refers to the pump that will discharge waste in the sump and transfer it to the house drain installed overhead
SEWAGE EJECTOR
114
Refers to the **semi-liquid substance** that accumulates at the **bottom** of the septic tank
SLUDGE
115
Refers to the parts of the **solids** that are formed and **floating** on the septic tank
SCUM
116
What do you call the process where **solid matter is reduced in sizes and consequently changed in character**?
DIGESTION
117
What are the two processes combined within the septic tank?
SEDIMENTATION & PUTREFACTION
118
Sedimentation occurs in what portion of the septic tank?
Upper
119
What process occurs in the **upper portion** of the septic tank?
SEDIMENTATION
120
Anaerobic decomposition occurs in what portion of the septic tank?
Bottom
121
What process happens at the **bottom** of the septic tank?
ANAEROBIC DECOMPOSITION
122
What bacteria causes decomposition of organic matter from human waste, they thrive naturally in sewage?
Aerobic bacteria
Anaerobic bacteria
Facultative bacteria
123
What bacteria within the septic tank functions in the **presence of material oxygen**?
AEROBIC BACTERIA
124
What bacteria within the septic tank functions in the **absence of free oxygen**?
ANAEROBIC BACTERIA
125
What bacteria within the septic tank functions **with or without free oxygen**?
FACULTATIVE BACTERIA
126
The process of decomposition is regarded as _________
stabilization
127
Refers to the **decomposition caused by anaerobic bacteria**accompanied by **bad odors**
PUTREFACTION
128
Refers to the **sewage that turns dark and smell unpleasantly** due to anaerobic decomposition
SEPTIC
129
What type of decomposition within the septic tank is NOT accompanied by unpleasant odor and can be accomplished with no definite time and could be within a matter of hours?
AEROBIC DECOMPOSITION
130
What type of decomposition within the septic tank is accompanied by bad odors?
ANAEROBIC DECOMPOSITION
131
Refers to the **lighter organic materials that rises to the surface of water within the septic tank**
SCUM
132
What are the **natural laws of nature** that *determines the effectiveness of plumbing installation*?
Gravity
Atmospheric pressure
133
Term meaning to flash or washout, to remove dirt or grease by flowing through. Also refers to self-cleaning ability
SCOURING
134
This is sometimes referred to as the **collection line of a plumbing system**
HOUSE DRAIN
135
Type of house drain that receives discharges of **sanitary waste as well as storm water**, already face out and no longer permitted
COMBINED DRAIN
136
Type of house drain which receives discharges of **sanitary and domestic waste only**
SANITARY DRAIN
137
Type of house drain that receives discharges from industrial equipment that contains some objectionable acid wastes
INDUSTRIAL DRAIN
138
Type of house drain that conveys all **storm clear water or surface wastewater except sanitary wastes**.
STORM DRAIN
139
A device **installed in the house drain** immediately inside the foundation wall of the building. It serves as a barrier and **prevents the gases coming from public sewer or septic tank** and circulating through the plumbing system
HOUSE TRAP
140
What are the different gases produced inside the septic tank?
CH⁴
CO²
CO
H²
H²S
SO²
141
Gas produced inside the septic tank which is a combination of **hydrogen and carbon**, a principal component of natural gas
CH⁴
142
Gas produced inside the septic tank which is a combination of **carbon and oxygen**, simplest oxide of carbon
CO²
143
Gas produced within the septic tank which is a **byproduct of methane classified as poisonous gas**
CO
144
Gas produced within the septic tank which evolves as a **moist gas** from organic waste
H²
145
Gas produced within the septic tank which is a **colorless gas with offensive odor**
H²S
146
Gas produced within the septic tank which is a **colorless gas having an irritating odor**
SO²
