2014
Sewage System Installer
Meetings
2014 Work Area Map
Sewage System Permit Application
Sewage System Permit Application
Page 2
Sewage System Permit Application
Page 3
Sewage System Permit Application
Page 4
Sewage System Permit Application
Page 5
Sewage System Permit Application
Page 6
Sewage System Permit Application
Pages 7 and 8
Sewage System Permit Application
Page 9
Sewage System Inspection Report
Filter Media Method
Absorption Trench Method
Area Bed Method
Open Bottom Biofilter Method
2014 Fees
2012 Code Changes
Grease Interceptors
• 8.1.3.1.(8)
• Grease interceptors for kitchen waste: Must
conform to;
– i) CAN/CSA-B481.1, “Testing and Rating of Grease
Interceptors Using Lard”, or
– ii) CAN/CSA-B481.2, “Testing and Rating of Grease
Interceptors Using Oil”.
Grease Interceptors
Cont’d.
• 8.9.3.3.(1)
• Every grease interceptor shall be maintained
in accordance with CAN/CSA-B481.4,
“Maintenance of Grease Interceptors”.
Site Evaluation
• 8.2.1.2.(2)
• The percolation time shall be determined by,
a)Percolation tests, or
• b)(i) Unified Soil Classification System
described in the Supplementary Standard SB-6
• (ii) the Soil Texture Classification as described
in Chapter 3 of the United States Department
of Agriculture, “Soil Survey Manual”.
Effluent Filters
• 8.6.2.1.(2)
• Sized to filter particles
of 1.6 mm
• Have a minimum area
of 550 cm2
Approved Effluent Filters
Effluent Filters
Manufacturer
Polylok
Zabel
Tuf – Tite
Zoeller
Bear Onsite
Model
PL68
PL122
PL525
PL626
A1800
A100*
A300*
A600*
A100**
A300**
A600**
EF-4
EF-6
WW1
WW4
WW4***
ML3-916
ML3-932
ML3-964
Opening Size
1/16” or 1.6mm
1/16” or 1.6mm
1/16” or 1.6mm
1/32” or 0.8mm
1/16” or 1.6mm
1/16” or 1.6mm
1/32” or 0.8mm
1/64” or 0.4mm
1/16” or 1.6mm
1/32” or 0.8mm
1/64” or 0.4mm
1/16” or 1.6mm
1/16” or 1.6mm
1/16” or 1.6mm
1/16” or 1.6mm
1/32” or 0.8mm
1/16” or 1.6mm
1/32” or 0.8mm
1/64” or 0.4mm
2
Surface Area (cm )
1,021
2,341
8,904
8,904
1,129
6,594 or 9,891 or 13,188
7,065 or 10,362 or 13,659
7,065 or 10,362 or 13,659
8,007 or 12,246 or 16,014
8,478 or 12,717 or 16,485
8,478 or 12,717 or 16,956
416
697
912
3,648
n/a
622****
622****
622****
Rated Flow (L/d)
11,355
37,850
30,280
4,542
6,813
9,084
11,355
17,032
22,710
3,028
5,678
3,785
15,140
15,140
10,400
10,400
n/a
* 8 Series – have 3 different cartridge lengths with differing numbers of plates providing varying filter areas
** 12 Series – have 3 different cartridge lengths with differing numbers of plates providing varying filter areas
*** WW4 groups 4WW1 cartridges in one housing that can be fitted with a sock to allow greater filtration
**** Filter cartridge area below invert of outlet only, however there is 800 cm2 of total filter cartridge area
Other Treatment Units
• 8.6.2.2.(1)(2) & Table 8.6.2.2.
• Amended to re-classify the effluent into three
levels:
– Level II – 30mg/l suspended solids and 25 mg/l CBOD
– Level III – 15 mg/l suspended solids and 15 mg/l CBOD
– Level IV – 10 mg/l suspended solids and 10 mg/l CBOD
• Note: BOD has been dropped and the treatment
levels now match those in the BNQ.
• What was Tertiary is now Level IV.
• New type A & B dispersal beds and Shallow
Buried Trenches require Level IV treatment.
Other Treatment Units
Cont’d.
• 8.6.2.2.(5)
• Existing Treatment Units listed in MMAH
Supplementary Standard SB-5 are still in compliance,
but SB-5 will be revoked on January 1, 2017.
• New certification will be CAN/BNQ 3680-600
• Anything certified by BNQ now is allowed (does not
need to be in SB-5)
• The BNQ standard includes cold weather conditions,
which differs from the NSF standard
Limitation on Design/Installation
• 8.7.1.2.(1)
• The design and installation of a shallow buried
trench, Type A dispersal bed or Type B
dispersal bed shall be carried out by a person
competent in this field of work.
• Type A & B beds added here…….previously
Sentence 8.7.6.1.(1) – OBC 2006 just referred
to SBT.
Distribution Pipes
• 8.7.2.2.(2)
• The header and distribution pipes shall be
designed and constructed so that they can be
detected by,
– a) magnetic means,
– b) 14 gauge TW copper light coloured plastic
coated tracer wire, or
– c) other means of subsurface detection.
• Discussion . . .
Length of Distribution Pipe
• 8.7.3.1.(3)
• Where a leaching bed receives effluent from a
Level II, Level III or Level IV treatment unit, the
leaching bed may have a total length of
distribution pipe not less than the value
determined by the formula, L = QT/300.
Loading Requirements for Fill Based
Absorption Trenches and Filter Beds
(Not a New Section)
• 8.7.4.1. & Table 8.7.4.1.
The area described in Sentence 8.7.4.2.(1) shall be designed such that
the loading rate does not exceed, for soil having a percolation time set
out in Column 1 of Table 8.7.4.1., the maximum value set out opposite in
Column 2.
Item
Column 1
Column 2
Percolation Time (T)
of Soil, min
Loading Rates,
(L/m2)/day
1.
1 < T ≤ 20
10
2.
20 < T ≤ 35
8
3.
35 < T ≤ 50
6
4.
T > 50
4
Construction Requirements
• 8.7.4.2.(1)
• Except for a shallow buried trench, a leaching
bed comprised of absorption trenches may be
constructed in leaching bed fill, if unsaturated
soil or leaching bed fill complying with
Subclause 8.7.2.1(1)(b)(ii) extends,
• a) to a depth of at least 250 mm over the area
covered by the leaching bed fill, . . .
Filter Beds
• 8.7.5.1.(b) & 8.7.5.2.(5)
• Up to 10,000 L/d for Level II, III, IV treatment
• Loading not to exceed 100 L/m2 on surface of
filter bed
Lets Take a 15 Minute
Break
Type A Dispersal Beds
• 8.7.7.
• Treatment unit must produce Level IV quality
effluent,
• Combined thickness of sand and stone layer
shall not be less than 500 mm,
• Sand must have a percolation time of at least
6 and not greater than 10 min, & not more
than 5% fines pass through a 0.074 mm (No.
200) sieve
Type A Dispersal Beds Cont’d.
• Sand must have a minimum thickness of 300mm,
• Sand must have an area not less than the lesser
of the stone layer as determined under 8.7.7.7.(6)
and the value determined by A = QT/850,
• If underlying soil has a percolation time greater
than 15 minutes, the sand layer must extend at
least 15 metres beyond the treatment unit or
distribution pipes in any direction that the
effluent will move horizontally with an area not
less than QT/400
Type A Dispersal Beds Cont’d.
• Stone layer shall be rectangular in shape with the
long dimensions parallel to the site contours,
• Have a minimum thickness of 200 mm,
• Covered with untreated building paper or
permeable geo-textile fabric,
• Be constructed such that the bottom of the stone
layer is at least 600 mm above the high ground
water table, rock or soil with a percolation time
of 1 min or less or greater than 50 min.
Type A Dispersal Beds Cont’d.
• Stone layer to have a minimum area not less than
the formula, A = Q/B,
• A = the area of the stone layer in square metres
• B = the following amount,
(i) 50, if the total daily design sanitary sewage flow
exceeds 3,000 litres, or
(ii) 75, if the total daily design sanitary sewage flow does
not exceed 3,000 litres, and
Q = the total daily design sanitary sewage flow in litres.
Type A Dispersal Beds Cont’d.
• The effluent shall be evenly distributed to
within 600 mm of the perimeter of the stone
layer,
• The stone layer shall not be closer than the
minimum horizontal distances set out in Table
8.2.1.6.B. and these distances shall be
increased when required by Sentence
8.7.4.2.(11).
Major Changes – Type A Bed
0.2m(min)
0.3m(min)
1% (min)
T > 50 min/cm
0.15m
Characteristics
Filter Bed
Old Area Bed
New Type A
Pre-treatment
ST or TU
Tertiary
Level IV
Gravel Size Area (m2)
Q/50 or Q/75 (ST)
Q/100 (TU)
Q/75 or Q/50
Q/75 or Q/50
Sand Area
QT/850 T ≤ 15
+ Mantle T . 15
+ 15 m req
QT/850 T ≤ 15
QT/400 T > 15
+ 15 m req
QT/850 T ≤ 15
QT/400 T > 15
+ 15 m req
Sand Thickness
750 mm
250 mm
300 mm
Sand Specification
0.25 <d10<2.5 mm
T = 6-10
T = 6-10
Separation to G/W, bedrock
and poor soil
900 mm
450 mm T = 6-50
600 mm otherwise
600 mm
Separation Distances
From pipe
From pipe
(TU’s if no pipe)
From Gravel
Sampling
Not Required
Every 4 years,
provide to operator, provide to
CBO on request
Every year, must provide to CBO
Compliance
N/A
??
2 x 30-day average
req (20 mg/L)
Type B Dispersal Beds
• 8.7.8.
• This type of bed is more like a trench across a
slope (rectangular in shape with the long
dimension parallel to the site contours),
• Can be constructed on sites with an average slope
not exceeding one unit vertically to seven units
horizontally,
• Requires a treatment unit which produces Level
IV quality effluent,
• Pressurized pipe in the stone.
Type B Bed
Slope
Direction
Type B Dispersal Beds Cont’d.
• Bed to be not more than 1,000 mm in depth measured
from the bottom of the stone layer to finished grade
when installed in soil with a percolation time that
exceeds 15 min, and
• Backfilled with leaching bed fill so as to ensure that
after the leaching bed fill settles, the surface of the
leaching bed will not form any depressions,
• The bottom of the stone layer shall be at least 600 mm
above high ground water table, rock or soil with a
percolation time greater than 50 min,
• Stone to be a depth of 250 mm below the pipes and 50
mm above the pipes.
Type B Dispersal Beds Cont’d.
• Distribution pipes to be spaced not greater
than 1.2 metres apart with the outer pipe not
more than 600 mm from the edge of the bed.
• Pump chamber to have storage capacity that
allows the effluent to be time dosed on an
hourly basis over 24 hours.
• If more than one bed, they must be separated
5 metres measured from the edge of the
stone layers.
Major Changes – Type B Bed
5 Metres
Direction of flow
Type B Design Requirements
• 8.7.8.3.
• There are 2 ways to calculate the area of a Type B
dispersal bed;
• a) Based on the loading rates for Type 2 effluent set out
in the Column headed “Type 2” found in Table 2-8 of
the BCMOH, “Sewerage System Practice Manual”, or
• b) The value determined by the formula, A = QT/400,
where A = the area of contact in square metres
between the stone layer and underlying soil,
Type B Design Requirements Cont’d.
• Q = the total daily design sanitary sewage flow
in litres,
• T = the percolation time of the underlying soil.
• If you use the BCMOH manual to determine
the area noted above then you must also use
Table 2-11, of the same manual to determine
the linear loading rate of the underlying soil.
• If you use the A = QT/400 formula, then the
linear loading rate is determined using;
Type B Design Requirements Cont’d
• i) 40 L/m, for soil having a percolation time
equal to or greater than 24 minutes, or
• ii) 50 L/m, for soil having a percolation time
less than 24 minutes.
• The width of a Type B dispersal bed shall not
exceed 4 metres.
• (See Example Calculations in Package)
Type B Dispersal Bed – Design
Calculations - Example
OPTION 1
•
•
•
•
Assume Design Flow Q = 1600 l/d
Native Soil = Silt Loam
Soil Depth = 1.5 metres
Slope of Land = 10%
From Table 2 – 8  Loading Rate = 15 l/m2/d
∴ Loading Area = 1600 / 15 = 107 m2
From Table 2 – 11  Linear Loading Rate = 42.2 l/day/m
∴ Length of Trench = 1600 / 42.2 = 38 metres
• Width of Trench = Loading Area / Length of Trench
= 107 / 38 = 2.8 metres
• Pipe Spacing = 2.8 m / 3 runs = 0.93 metres
(Remember your pipe spacing cannot exceed 1.2 metres so you have to use at least 3 runs in this
example.)
Table 2 - 8
Table 2 - 11
Type B Dispersal Bed – Design
Calculations – Example
OPTION 2
• Assume Design Flow Q = 1600 l/d
• Native Soil = Silt Loam (T-time = 24 mins/cm)
• Loading Area “A” = Q T / 400
= (1600 x 24) / 400 = 96 m2
Linear Loading Rate for soil with T ≥ 24 mins/cm = 40 l/day/m
∴ Length of Trench = 1600 / 40 = 40 metres
• Width of Trench = Loading Area / Length of Trench
= 96 / 40 = 2.4 metres
• Pipe Spacing = 2.4 m / 2 runs = 1.2 metres
(This example using the “Option 2” calculation method will allow 2 rather than 3 runs
to be installed.)
Sampling of Treatment Units
• 8.9.2.4.
• Operators of treatment units used with SBT, Type
A & B dispersal beds must take grab samples to
test levels of CBOD5 and suspended solids.
• The concentration of CBOD5 and suspended
solids is deemed to comply with the maximum
concentration requirements in Table 8.6.2.2.
when it does not exceed 20 mg/L for each of
these parameters.
• If the grab sample does not comply, resampling
must occur within 6 months.
BMEC Authorizations
• BMEC area beds are still approved as long as
the authorization is still valid. Check the
MMAH website to get the up to date BMEC
authorizations.
• Applications for Permits: Please note on the
bottom of page 1 if the proposal is under a
BMEC authorization.
Transition Rule
• If a building permit was applied for before
January 1, 2014, the building to which the permit
relates may be constructed in accordance with
the 2006 Building Code.
• This rule does not apply unless construction
begins within 6 months after the permit is issued.
• For sewage permits issued by the Health Unit,
construction must begin within 12 months of the
date the permit was issued.
Knowledge Maintenance
• The 2012 Building Code authorizes mandatory
knowledge maintenance examinations to
evaluate your knowledge of changes between the
2006 and 2012 editions of the Code.
• The Director of the MMAH Building and
Development Branch will give notice when the
knowledge maintenance program requirements
will begin. No decision as of yet.
• Once implemented, affected practitioners will be
given notice by MMAH and would have 18
months to comply.
QuARTS
• QuARTS is a bilingual, web-based Qualification &
Registration Tracking System maintained by MMAH.
• Practitioners with a BCIN number can request an ID
and password on the website and use it to make
applications for exams etc. or update their records.
• QuARTS also allows the public to access a registry of
building practitioners and organizations in order to
verify their qualification information.
• (https://portal.mah.gov.on.ca/quarts/)
Questions?
•
•
•
•
Mark Green, BA, CPHI(C)
Chief Building Official
613-345-5685 ext 2285
[email protected]