"Nightjar" wrote in message
...
On 16/08/2018 12:34, The Natural Philosopher wrote:
On 16/08/18 12:12, Nightjar wrote:
On 16/08/2018 09:35, The Natural Philosopher wrote:
...
Its not particularly onerous. But it does set a precedent for
retroactive building regulations which is slightly worrying.

There is no retroactive application of construction standards to septic
tanks.

Yes, there is.

The regulation says that by 2020 or if you sell the house you must modify
your private sewage plant to meet a given standard...

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.