Supplement 4
Commercial Swimming Pools and
Spas
This is an attachment to the Industrial Waste Application. Please provide the following
information about your business operations (or intended operations.) This will help us verify
appropriate waste treatment and charging.
Business trading name___________________________________
1. Dimension of pool or spa in metres
L=______ W=______ D=________
2. Total volume of pool or spa
______________ kilolitres
3. Rate of discharge of backwash
______________ litres per second
4. Backwash frequency and duration
______________ times per week
______________ duration in minutes
5. Capacity of proposed settling pit/balancing
tank
______________ litres
6. Is the pool or spa drained for maintenance?
Yes
How many times?
7. Total volume of proposed discharge including
backwash (see calculation below)
A
B
Total pool
volume drained
to sewer
Total annual
backwash
volume
discharged to
sewer
(_______)
No
______________ per annum
______________ kilolitres
x
(_______) =
(pool volume in kilolitres) X
(
)
kilolitres
(number of times drained per annum) =
(backwash rate in litres/sec) X (backwash
duration in minutes) X (times per week) X (weeks
per year)
(____________litres/sec) X
(_____________minutes) X
(__________times per week) X
(___________weeks per year) X 0.06
Total volume discharged to sewer per annum = A + B =
(
)
kilolitres
Important Notes
1. The type of filtration unit, associated pipework and the point of connection to the property
sewer must be shown on the plans attached to this Application.
2. If cartridge filters used show the location on a plan where they are cleaned or serviced.