LATE RFI Attachment 6 - Stormwater Management Plan

Table 11 gives a breakdown of the different pollutant types that are commonly found in effluent
water from washing your vehicle at home. This pollution load is currently directly discharged
into the local stormwater system. The table shows that the pollution loading is well above what
is generally expected when compared with the levels commonly found in the natural marine
water environment.




Table 12 is similar to Table 10; but with the addition of the proposed Cooroy Car Wash customer
usage being included in the table. This table includes the total estimated Cooroy car wash
patronage of 67,712 vehicles per annum (as taken from Tables 8 + 9). It also assumes that there
is a smaller percentage of people that still use an alternative commercial car wash- even though
these facilities may not be directly located in the Cooroy PTA or STA.




Car Washing is often seen as an opportunistic use; in that it is most common to be used by
passing trade (ie: by customers from the adjoining two Service Station sites) or passers-by. Car
Washes are most successful when they are in a convenient location that is easily accessible- such
as being on the way to/from the school drop-off/pick-up, on the way to/from doing your food
shopping, on the way to/from visiting family/friends or an appointment etc... Usually, Car
Washes that are not in a direct path of travel or line of sight are often not as successful as they
are not used as an ‘opportunistic’ habit and the customer needs to drive out of their way to use
the car wash facility.

 - 19 -      TMC Building Design Group