Percolation Area Design?

snowy393

Hello,

I want to find out a bit more information on the percolation area designed for my house. My planning was under the SR6:1991 regulations.
My site layout plan has a raised percolation area of 150m2 and a reserve area of 150m2.

I have a normal septic tank on the plans.

The reason I need a raised bed is due to the soakage being a little fast. Its a dry site. I have built up the entire area where my garden and septic are going as the site is on a slight slope and I didnt want a step down into the garden.

I looked in the sr6:1991 regulation doc and found the correct depth and size of the trench, and height of pipe above rock/watertable etc and am OK re these requirements.
My plans dont have a detailed pipe layout drawing or length, just the 150m2 raised bed size.

For the pipe layout, I am assuming a raised bed of 10m x 15m to achieve 150m2.
The pipes at the edge have to be in 3m.
The centres then have to be 2m
10-3(first row)-2(second row)-2 (third row). 3 row of pipe in the 10m area.
15-3-9(length of pipe)-3. 9 metre of pipe in the 15m length.

3x9=27metres of percolation pipe in 150m2 raised bed.

Is this a correct assessment of length of pipe in a 150m2 raised percolation.
I realise that 2 of these are required as reserve also needed.

Poor Uncle Tom

I assume from the tense of your post that the percolation area is not in place yet. If this is the case how is your system not under the provisions of the EPA Code of Practice?

BryanF

This needs an assessment by a qualified PI covered professional on your particular site. This professional will advise and then sign off on the perc area and septic a tank install.

snowy393

Thanks for the reply,

I have planning for this house for a good while now. Im only building it as I get the money so hence Im only getting to the outside now. Im mortgage free and dont necessarily need a sign off for money, but none the less want to do it correct so as not to poison my water or neighbours water.

My site was assessed when I applied for planning and as a result of that assessment on the site suitability report it recommends 150m2 perc area and 150m2 reserve perc area, and a normal septic tank. Thats all the detail it calls for in the planning, and built per SR6:1991.
All my neighbours also have a normal septic tank also.

I want to understand myself what was the normal approach (piping amount) when asked to build a 150m2 raised bed under the old regulations and then I will decide what to do. I dont see why I would need to reapply for planning for this as I plan to install as per requirements when granted.

Im not opposed to implementing some of the new guidelines to the old and to end up with a compliant, functioning system. Like 2.5 metre centres instead of 2m centres and the like.

exaisle

You could consider having an informal chat with the planning dept of your LA...

BryanF

snowy393 wrote: »

Thanks for the reply,

I have planning for this house for a good while now. Im only building it as I get the money so hence Im only getting to the outside now. Im mortgage free and dont necessarily need a sign off for money, but none the less want to do it correct so as not to poison my water or neighbours water.

My site was assessed when I applied for planning and as a result of that assessment on the site suitability report it recommends 150m2 perc area and 150m2 reserve perc area, and a normal septic tank. Thats all the detail it calls for in the planning, and built per SR6:1991.
All my neighbours also have a normal septic tank also.

I want to understand myself what was the normal approach (piping amount) when asked to build a 150m2 raised bed under the old regulations and then I will decide what to do. I dont see why I would need to reapply for planning for this as I plan to install as per requirements when granted.

Im not opposed to implementing some of the new guidelines to the old and to end up with a compliant, functioning system. Like 2.5 metre centres instead of 2m centres and the like.

Signing off to building regulations is IMO more important than your ownership / lack of mortgage. If for example you want to sell, gift to family, get a mortgage in the future, certificates of compliance with planning and building regs will mater to you. Btw I commend your mortgage free approach

sydthebeat

snowy393 wrote: »

Thanks for the reply,

I have planning for this house for a good while now. Im only building it as I get the money so hence Im only getting to the outside now. Im mortgage free and dont necessarily need a sign off for money, but none the less want to do it correct so as not to poison my water or neighbours water.

My site was assessed when I applied for planning and as a result of that assessment on the site suitability report it recommends 150m2 perc area and 150m2 reserve perc area, and a normal septic tank. Thats all the detail it calls for in the planning, and built per SR6:1991.
All my neighbours also have a normal septic tank also.

I want to understand myself what was the normal approach (piping amount) when asked to build a 150m2 raised bed under the old regulations and then I will decide what to do. I dont see why I would need to reapply for planning for this as I plan to install as per requirements when granted.

Im not opposed to implementing some of the new guidelines to the old and to end up with a compliant, functioning system. Like 2.5 metre centres instead of 2m centres and the like.

may i ask when the original permission was granted, and what county?

snowy393

Thanks for the comments.

I spoke to a local engineer who inspects septic tank/percolation requirements for the council and have installed as per his instructions. Another job done and dusted.