Nightjar posted
On 16/08/2018 16:55, NY wrote:
"Nightjar" wrote in message
...
...
There is absolutely no requirement to modify existing plants. All
existing plants, no matter how old, can be left exactly as built. The
requirement is that you must ensure that the outflow from the plant
does not contaminate a waterway.
Which may amount to the same: you may need either to modify your
plant so its output is cleaner, if it discharges into a waterway, or
else you may need to modify where the unmodified outflow goes
(soakway rather than waterway). One way or the other you may need to
pay, even though your system met the relevant standards when it was
installed.

The result may well be that you need to spend money to clean up the
outfall, but that does not constitute a retrospective application of
current standards to the plant itself.

The OPs plant and drainage filed will not be certified to the relevant
British Standards. However, neither needs to be changed in any way to
meet the regulations.

How do I make the outflow cleaner without replacing or modifying the
tank or drainage field?


--
Jack