Published in Soakaway Design – Groundwater Level. The soak pit should be between 1. A drainage field (or soakaway system) is a perforated or slotted network of pipes which provide secondary treatment of the waste. See more of Soakaway crates on Facebook. The wastewater generated in the house from the kitchen and bathrooms has to be disposed of. A soak pit or a soakaway is a closed porous chamber that is directly connected to a primary treatment unit of residential or commercial building. 1 for toilet which enters a manhole within 2 metres of building and then onto two other manholes and eventually a soakaway tank arrangement . . To calculate the actual length of trench, divide the result above by the width of the trench required eg for a 600mm/ 0. We used to lay them before the 70s (when perforated plastic came in) on my Dad's farm which was heavy clay soil. How far away should a Soak away be from the house when laying imprinted concrete,and where should drains be fitted when drive. As assessment of the property will also need to take place to calculate the distance of the drainage field from obstructions, ditches, surrounding buildings and water abstraction points such as such as surface water and groundwater. This water flows out of the tank and into soakaway drainage field. 4m deep (hit rock) As you can see from the pictures, it looks like clay and certainly acts like clay. 26This can save you 50% of your water bill as well as solving your soakaway problem. A stratum of sand and fine gravel is spread across the lowermost layer to aid in the dispersion of water. The total garden depth is only about 6. Next day, refill the test section with water to a depth at least 300mm (12in). Help! How do I. RedHerring. Apply common sense. Limestone or fissured rock allows pathogens to travel much further. Depending on the type you have, the pipe which runs to your soakaway will either come directly from your property (usually a gutter), from an area where there is an overflow of surface water (via a system such as a French drain), or from a private system such. A soakaway is an efficient and low-environmental impact way of dealing with either foul or excess surface water in your drainage system. This means, in total, your soakaway is 1600mm or 1. After, we discharged the Septic Tank. Where an existing soakaway shows signs of instability it is recommended that after the remedial measures have been completed the bottom two metres of the chamber be sealed with a bituthene coating protected by a 150mm thick dwarf wall formed from Class ST4 concrete. 2 Jul 2011. 8m 3 . The trenches for the soakaway should be between 300mm and 900mm wide with a distance of 2m between trenches. There will also be rules about the permitted turning radius in a curved driveway. sited at least 5m from the foundations of a building. so the further away the better. the distance between the pan outlet and the bottom of the Rest Bend must be less than 1. ie the length of your house in metres multiplied by the width. 38 × 30 m 3 = 11. roughly 2m x 1m, x 1. Should not be close to another soakaway or in a location where the water may. January 13, 2021 Drainage. Fill the hole with water and come back and check it the next morning. See the map below or our 'areas covered page' for our services reach and use our postcode checker. 0m; Soakaways to be honeycombed brickwork, hollow concrete rings, or storage cells; Volume required = design area x rainfall (0. A t = p X V p X 0. We always start our patios 3 or 4 inches (100mm) away from the house. This is to prevent any negative effects from the infiltrating water on the house foundations. We would like to show you a description here but the site won’t allow us. The pipe end entering the soakaway must be at a depth of 25mm minimum and the end of the pipe cut at 45°Septic Tank – distance from house in England & Wales. After, we discharged the Septic Tank. The effluent in the outlet from the tank should be free flowing. POSITIONS. The key elements of the Part H rules are that the soakaway must be 5 meters from a building or road. At this stage, the soakaway size should also be determined so that it fits in with the size of your house. 4 Design and Construction. Soakaway crates help to control the level of surface water, particularly in areas that are prone to flooding. Once the hole is dug to the correct depth, add a layer of gravel at the base, approximately 1000mm. Ratings: +42,529. Within 5m of a building or road, 2. And the last thing you want is for that to happen in the depths of winter! So, if your condensate pipe is going to be external, ensure it’s larger than 22mm. Submitted soakaway design details shall include infiltration test results. If you do not understand the formula, the percolation test, or the best way to form a soakaway, then come back and we will point you in right direction. Knowing where it should go on your own will allow you to know where it should be placed and how far. My question is will a soakaway built that close to the wall cause any issues with the garden wall foundations? I am proposing to build a 1m3 soakaway to cope with the run off from the patio plus the. Re: Biodigester Soakaway In Waterlogged Area by phabulousangel ( m ): 8:38am On Sep 28, 2022. Soakaways are used to. The Nicholls team can also work. If it is disposed of in open it not only creates unhygienic. It takes approximately 5. Table 2 Soakaway Area Requirements at. The pipe end entering the soakaway must be at a depth of 25mm minimum and the end of the pipe cut at 45° Septic Tank – distance from house in England & Wales. The design of a typical soak pit generally consists of a pit of approximately 1 cubic meter with a depth of 1. Designing a house is hugely exciting, but knowing where to start can also feel daunting. The soakaway must be a minimum of 10. Log In. A septic tank is deeper than a soakaway and is plastered before being levelled, however, a soakaway is not handled in the same manner because the floor is left in its current condition and it is also shallower. Soakaways can be blocked by rainwater, which can quickly turn into an expensive issue. The condensate pipe goes strait in to the ground right next to my. Minimum distance of 1m from base to top ground water level (taking into account seasonal variation) Minimum distance of 5m from any building, road. found a inspection cover 6 inches under the soil, right in the middle of the base. Hi. On 2016-11-09 by (mod) - How far can I put the septic tank from the house? Distance from house to septic tank is limited by your site size, dimensions, local setback laws, and by the slope or relative elevations of the land (or use of a septic pump). Soakaway capacity to hold maximum daily rainfall (taken as 40mm) Storage depth minimum 1. A soakaway is a buried drainage feature which seeks to manage surface water on the site and infiltrate into the ground, rather than discharging to an offsite location such as a watercourse or sewer. ukA simple, trapped gully will be installed on the edge of the patio nearest the soakaway, and a pipe will link the gully (which could be a linear channel , if preferred) to the cells that are about to be installed. If you are dealing with a boundary, it must be at least two and a half metres far from that. Sokoine Building, P. 2019/11/10 Kristina Daddio . Published in Soakaway Design – Groundwater Level. As new wastewater enters the septic tank, it displaces the water that's already there. In other places, where they still do not have this resource at their disposal, it is used as a sewage treatment system for the black well, also known as the blind well. The void space in the fill provides the water sotrage capacity while the water infiltrates through the trench walls into the surrounding soils. On 2017-01-18 by (mod) re: maximum distance from house to septic tank depends on these factors: Ray You ask a fair and common question: the maximum distance from house to septic tank is not, by anything I've read, specified by codes or standards but. Ensure you connect the gutter securely to the eave of the roof. 100x1. Condensate Soakaway Code: SOAK1GR 500mm minimum 300mm Hole width 200mm CODE: SOAK1GR Hole and SOAK1GR filled with 10mm Limestone Chippings Holes in SOAK1GR to face away from wall Hole depth 400mm Ground Level Maximum Possible Gradient Side Connection Top Connection 2 300mm 1 3 Ø110mm Ø100mm 5 4. I was wondering if the distance from a house to. if, for the soakaway location, r on Figure 1 = 0. 2. 0 m × 3. A new Planning Permission has been passed which includes a soakaway for onsite surface water disposal. The position is your choice. 040 = 0. ISBN. Failure of soak-aways can. Martin’s House, Waterloo Road, Dublin 4 Tel: +353 1 660 2511 Fax +353 1 668 0009 Email: [email protected] and the width of the front garden is 5. If we can run a 22mm pipe back across to the main drain then that sounds a lot less expensive than a foul pipe over the same distance. We recently moved into an old terraced house (c. Septic tank and soakaway: An in-house full flush-toilet connected via pipe and plumbing fixtures to an underground watertight settling chamber (the ‘digester’) with a liquids outlet to a subsoil drainage/soakaway system. Within 6 months. sited to take account of. If the pipe starts in a trench 300mm deep the bottom of the pipe will be 600mm below the ground when it gets to the soakaway. A soakaway is a hole in the ground that has been filled with pebbles, rubble and coarse stones. The outlet is 110mm pipeBIODISC DOMESTIC SEWAGE TREATMENT PLANT. A Sewage Treatment Plant can discharge directly to a drainage ditch, watercourse or river. In Auckland managing rain or so called “Stormwater” correctly is critical for the cities growth and. We can also deal with your insurance company directly on your behalf at no extra cost to you. How Far Should a Soakaway be From the House? You need to ensure its far enough from the structure to prevent damage — 5 metres is the. 2 – How Far Away From the House Must it be Located? The regulations state that a rainwater soakaway must be located at least five metres from the wall of a building and. #4. Standard regulations states that for any house up to and including 3 bedrooms, the minimum size sewage system that can be installed is for 5 persons, with one extra person added for each extra bedroom. generally on a house extension, the gullies are joined by 110mm pipe below the ground and then 1 pipe goes to a soakaway. The repairs can then be authorised with your insurance company prior to works being completed. You can either infill with clean hardcore or crates (see what BC will accept: some insist on crates) but either way line the hole with Terram. 05m/h. ianmcd said: yes it should be a min of 500mm away and yes you can buy the soak away container but there is no regulation that I am aware of that says you have to use such a container, the lime chips just neautralise the acid in the condensate discharge. Surrey. POSITIONS. In clay soils. Wrap your soakaway crate in the geotextile membrane, making sure the membrane covers any outward-facing surfaces, including the pipe entry point. 0 Introduction. Can I put a soakaway next to my house?. All Civil Engineering MCQ; Structural Analysis MCQ; Hydrology MCQ; Remote. So Is the site totally undev. This discharge does not require a Drainage Field. Edge of soakaway 2. The frequency of desludging will depend upon the capacity of the tank and the amount of waste draining to it from the dwelling but further advice on desludging frequencies should be obtained from the tank manufacturer or the desludging. Reed beds are quite small — a typical 4-bedroom house with 4 people living in it will need a reed bed of 8 to. Condensate Soakaway Code: SOAK1GR 500mm minimum 300mm Hole width 200mm CODE: SOAK1GR Hole and SOAK1GR filled with 10mm Limestone Chippings Holes in SOAK1GR to face away from wall Hole depth 400mm Ground Level Maximum Possible Gradient Side Connection Top Connection 2 300mm 1 3 Ø110mm Ø100mm 5 4 CONDENSATE SOAKAWAY, SOAK1GR Maximum Possible. You’ll need a new bottle gulley under the new down pipe. SurfaceRecords of the soak away distance from relative bore holes were measured in the field with a measuring line tape of 50meters and the corresponding distances of all the septic system was recorded. 5m = 19. It must not be constructed nearby a. 0 m = 15 m 2. They are also referred to as dry wells, soak wells or soak pits in other countries, but in the UK are known as soakaways. Th next day it rained and the whole completely filled with water and ha overflowed into the garden. If you don't find the pipe, come in 1. After this, add the remaining rubble so that it surrounds the drainage pipe entering the pit. i have looked in the valiant manual and it says distance for external pipe should be minimal to prevent freezing then it goes on to say should be a max of 3 metre with a 45mm fall per. Methods To determine the minimum safe distance of a tubewell from a pit latrine in different hydrogeological conditions of Bangladesh, 20 monitoring wells were. Our house (excluding conservatory) has a neighbours house at the end of the garden, wall to wall it is about 12m - the existing shared soakaway looks on the original plans to be in the middle of this (i. Steps: To build a basic stand-alone soakaway, dig a pit in your soft turf no less than 1m2 and 1. 6m deep. But a) I can't remember where I got the info' from. A soakaway is especially useful in built-up areas that have been built from impermeable materials, as it allows water that would usually pool and flood to naturally ‘soak away’. You can adopt this best and costly technique to divert rainwater away from the house. They look like land drains to me. at least 10m from any watercourse or permeable drain; at least 50m from the point of abstraction of. Soakaways should last the life of the house, at least 100 years but only if. The distance from the road path to my house front is 6. Unfortunately, in my case that's quite far from the back of the house so it would involve extensive pipework, including under my driveway, and be very expensive. 5m - so to be 5m away from the house i'd need to build the soakaway right up against the boundary wall. How deep should a soak away be? How deep should a soakaway be? The Perforated pipe should be laid at a minimum depth of 200mm and a maximum depth of 700mm. 10 Mar 2020. VP x Population x 0. Soak pit construction procedure. Or get some. If above ground the condensate pipe must be protected with a waterproof lagging. Contrary to what you believe, digging a big hole next to your house will cause it to fill up with water and the area will be permanently wet. The downpipe runs vertically from the fascia for. Soakaway Pit Design. Soakaways are a traditional surface water drainage system for buildings that are far away from a public sewer or watercourse, and are usually suitable for areas of less than 100 square meters. N. you have not changed the volume of the discharge or, if you have, it’s not more than 2 cubic metres (2,000 litres) to ground. This should also include 15 metres of distances from other habitable buildings if the water is going to a drainage field. " As for the soakaway/drainage field this should be as follows. 5m from any boundaries. Fill the hole with water and come back and check it the next morning. orSt. In unsuitable areas a mound soakaway should be used so that there is at least 2m of soil between the bottom of the soakaways and the water table. The Soak Pit should be kept away from high-traffic areas so that the soil above and around it is not. It includes design guidance for soakaway pits, trench soakaways and general advice for. 5 1. On my Victorian house - so a bit older - no soakaways. Septic tank and soakaway: An in-house full flush-toilet connected via pipe and plumbing fixtures to an underground watertight settling chamber (the ‘digester’) with a liquids outlet to a subsoil drainage/soakaway system. 3m deep and 1m x 1m. In the picture below - a poorly designed and constructed soakaway is located too close to the proposed extension, whose foundation trench can just be seen. 5 meters from any building and any boundary. The key elements of the Part H rules are that the soakaway must be 5 meters from a building or road. Estimate of Soak Pit. This is to avoid any issue or possible interaction with either your property or. I'm in the process of getting planning for a house. In the range of septic tanks we sell, there's a 2,700L 4-person capacity, a 2,800L 4-person capacity, or a 2,800L 5-person capacity tank. With. generally on a house extension, the gullies are joined by 110mm pipe below the ground and then 1 pipe goes to a soakaway. 040) Example 1. The soakaway must be a minimum of 10 metres from a watercourse, 15 metres from a building and 50 metres from a borehole or spring. #9. The soakaway should be sized to contain the 1 in 10 year rainfall event. It needs to be a significant distance away, normally at least 5m. They are: Soakaway should not be within 2 metres of a neighbouring boundary. or St. ie Web: . In contrast, the discharge from modern small sewage treatment plants has been processed in more stages, so shouldn’t need a soakaway. It was fitted with a condensate soakaway as no drainpipe/drain nearby. Country. Septic Soakaway Installation, Leach Field or Drainage Field Installation UK. 2m3 per crate) £36. At best, it will do nothing. Therefore, sitting borehole close to any pollution source (soakaway) is very detrimental to the quality of the ground water resources TABLE V. You may require a larger soakaway for a house. A drain field is made of solid perforated pipes (NOT 'Flexicoil' land drainage pipe!), a minimum of 2 metres apart and a maximum of 700mm. A Soakage Pit is a covered, porous-walled chamber that allows water to slowly soak into the ground. Flush your toilets, do your laundry, all with rainwater which will never present you with limescale problems and you use far less detergent as it is so soft. In the following information we will be focusing on the city of Auckland which is the most populated and quickest growing region in New Zealand. The water table should not reach the bottom of the pit at any time of the year. Flat roof 3m x 6. 2. into the main drainage. Permeable pavement with infiltration close to house foundations The key elements of the Part H rules are that the soakaway must be 5 meters from a building or road. #4. p = Number of persons served by the tank. 25. MAYO (Tel: 01-6476834/37 or 1890 213434; Fax: 01-6476843 or 094-9378964) or through any bookseller. 3 flats with one septic tank, the other flat with one Septic Tank. e. 50 metres of a chalk river or aquatic local wildlife site. I have to state that it was hard work digging the hole, as it. Therefore the above size soakaway will suffice. 3. 29 ex VAT)True Oga mi. see specifications for pipe bedding and pipe surround materials. as it would to dig 5 meters away to create a soak away. French Drains – How They Work. A inspection chamber must be installed between the septic tank and the soakaway. This can be caused by natural movements in the soil or say by driving a heavy car etc over the drainage field. SEPTIC & SOAKAWAY PIT President's Office, Regional Administration and Local Governments. 5 1. Log In. 50m from water abstraction points, boreholes, springs. If you cannot slope the slabs away you may wish to consider acho type drainage channels against the property which may be connected. How big should I make the soak away. 00 user 10, 290mm c/c for diameter. 3. Forums. We are happy to help, call us on 0800 3101092 or via our contact form. . You should recieve some clips or ties with the crates. Your sewage treatment plant has to be 5 metres away from trees, fences and hedges, 10 metres away from a watercourse or stream, and 50 metres away from any lake or foreshore. The tank which Stores a waste water of House or building is called Septic Tank. It allows water to filter through it and soak away into the ground. kingandy2nd. The soakaway must be designed to BS6297: 2007 and all percolation test results must be submitted. 5 3. Step 2. A soakaway is a hole that is dug into the ground and then filled with coarse stone/rubble or specially designed plastic crates. These are used to hook up the crates to prevent movement while the side-filling materials are added. 10 metres away from the open drain. The discharge point shall be more than 10m from habitable property. A soakaway is simply a pit full of hardcore which allows the water to collect and slowly soak away through the soil. The Soakaway Design Guide (July 2000) D4 f18. Where C is the capacity or volume of the soakaway in m 3 A is the area of roof of the building in m 2 R is the rainfall expressed in m/h (metres / hour) For the rainfall a standard 50mm per hour is usually used which equates to 0. The regulations state that a rainwater soakaway must be located at least five metres from the wall of a building and at least two and a half metres from a boundary. 5. complying with rule that it must be 5m from permanent wall). How far must a soakaway be from a house?. They should also be located within 30 metres of an access point so that the tank can be emptied. 3. Also, to the front of my proposed house is a road surface water drain. Fill with large chunky clean rubble or 20mm gravel to about 5" from the top. 5m. Figure 1 – Connection of condensate discharge pipe to internal soil and vent stack. 2 Small wastewater systems that discharge to the same aquifer that supplies a public water supply wellThe 2 manholes at the side of the house are probably 2' 6" deep and sit at a similar height to the rain water gulley. Soakaways should be constructed in a circuit to make a continuous loop. The average lifespan of a septic system is estimated at 15 to 40 years, but it may last longer if properly maintained. IIRC in areas I've lived though, 1930's have been combined drain. According to the new building regulations any soakaway should be 5m from any foundations and at least 2. In order store, the Wastage or sewage for 10-30 Days Septic tank is constructed and the same is designed. you have not changed the volume of the discharge or, if you have, it’s not more than 2 cubic metres (2,000 litres) to ground. FAQs about clearances for septic tank, drainfield, soakaway bed, & wells:. 100 depth below invert = 1. Within 6 months. The soak pit should be kept away from high-traffic areas so that the soil above and around it is not compacted. The trenches for the soakaway should be between 300mm and 900mm wide with a distance of 2m between trenches. In 2020 guy said he thought there might be an issue with the soakaway as he thought he heard water draining back in. This calculation produces Vp in secs/mm [conversion = (1/Vp) /1000]. Soak Pit Design. The magnitude of any negative effects is determined by the size and infiltration volume of the soakaway , the distance to the slope, the slope gradient and the local geology. Dear All, I am trying to resolve an issue with an existing soakway in the front garden at my residential property in the UK. 2) m3 is suitable for a family with 4-5 members, which has the capacity to carry 300 per lit discharge in the day. They can and will freeze when exposed to the elements. You could potentially do away with gutters and have dispersal straight from the. The minimum size a soakaway should be constructed to is 30m. co. septic tank distance from house How far should a septic tank be from a house? How far should a soakaway be from a building? How far should the soakaway be from a well,. There is always a work-around to it. 05 of 12. Broken down, labour costs average around £240 per day. Building, planning and design. In order to carry the flow and to avoid blockages, the drain or sewer that you intend to connect to generally needs to be at least 0. Mary Long-Dhonau explains: “ [The size of your soakaway] will vary depending on a number of factors, including the size of your driveway area, number of. groundwater and the constraints these may place on soakaway design and. i man hole cover or concrete 200mm reinforcement concrete slab minimum distance from septic soak way building property boundaries wells cuts or embarkments water pipes large trees 1. Soakaway and Septic tanks with very long distance kilometers to the discharge points can also affects how much it will cost to clean and evacuate the Septic Tank contents. 400m below GL. First things first, your soakaway or drainage field should be at least 15 metres away from any building and 50 metres from a water supply, a well for example. road construction (see note 17) frl. 2 metres deep. 6. #1. Detailed design guidance is given in BRE Digest 365 or CIRIA Report C753. Same distances apply to the soakaway. Rainwater goes to separate soakaway and toilets, showers, sinks, machine etc to septic tank. Unfortunately, in my case that's quite far from the back of the house so it would involve extensive pipework, including under my driveway, and be very expensive. Pipes should be laid on a 300mm layer of shingle or medium of up to 50mm. So the entire area is just under. . To calculate the size/volume of a rubble filled soakaway, the same calculation can be used but the result divided by 0. 3 = 2. 5m to 4m. Minimum soakaway drainage field distances. It depends on what the water table level is like where you live. To calculate the size of the soakaway, use this formula: Area = P x V x. 2 = 40m2. trench. discharge point below the soakaway, and within the unsaturated zone above the water. It was fitted with a condensate soakaway as no drainpipe/drain nearby. A t = Area of the drainage field in m 2. The main provisions of these regulations are: The Sewage Treatment Plant must be sited more than 7m from habitable property. See moreSoakaways should be built a distance of at least 5. flameport said: You cannot build a soakaway next to your house. Regulation, i. Figure 1 – Connection of condensate discharge pipe to internal soil and vent stack. Regulation, i. 9 Oct 2019. Tidy up the soak away and trenches by removing any loose soil that has fallen in. Sizing of a soakaway The length of the soakaway drains is determined by the number of bedrooms in the house and the porosity of the soil. Approved Document H gives guidance on additional measures needed where drains have to run close to foundations. When it is full it has to be emptied and the waste water taken away by tanker to a disposal point. it is more often than not related to the soak-away system rather than the septic tank itself. Hi everyone, Thanks for the info ref the soak-away test, suitability in clay and the common 70's practice. in you case you could run a pipe across the front of the building and join at 1 corner. Mark the hole 75mm (3in) from the bottom and 75mm (3in) from the top by pushing 6 inch nails into the sides of the of the percolation test hole. All soakaways must be sited at least 5m from any building or road and preferably at least 2. 6m deep. g. The bigger the better. A final option for driveway drainage is building a trench – or channel – drain. Our Klargester BioDisc® models have been designed to cater to homes without access to mains drainage. existing ground / formation level. When the soil starts to build up in the soakaway, you can cover it with heavy duty fabric. We do this for two reasons. It serves the function of letting the wastewater coming from the septic tank to slowly soak into the underlying ground. 38 times the volume of the hole. My 100 year old terraced house has a soakaway at the front for rain water only as there are no drains at the front. Devon. Percolation test procedure for surface water soakaways. For this reason, they must be a set distance away from a home. It should be constructed at a safe distance of at least 30 m away from local drinking water sources as it can possess the threat of contamination of. Get in contact for a Free quote. 5 years old. South. Design soakaway. --. The proposed soakaway borehole must meet the drainage standards for soil infiltration and storage emptying. Calculate your soakaway size. Similarly some silts are also largely unsuitable, though this depends on the particle size. Hi all, I was recently looking into purchasing a small building plot , problem is it has a neighbours soakaway right on the rear boundary and is virtually impossible to get the 7m distance and still build anything worthwhile, it' s a real shame as is a very nice plot. Collapsed or displaced pipes in the soakaway. 5 and 4 m deep, but as a rule of thumb, never less than 2 m above the groundwater table. However, this soakaway is only about 2 or 3ms away from our existing. . A soakaway system can be used on its own to control waste water, or it can be combined with a septic tank in cases where there isn’t a suitable area for a. 5m3 tank for a 3-person house = every 4 years. Pipework to transfer the rainwater from the gutters, driveway, patio etc, to the soakaway. the back garden is on a slight slope towards the house, so they said this would remedy. A safe distance is generally 30m from watercourses and wells, and 3m from structures. Or undertake a new Installation. 5 3. This allows for a 150mm base layer of sharp sand, 150mm of sand or gravel sidefill all around the outside of the crates. It also incorporates previous amendments. if its not under building regs you can do it any distance, min 5m is the ideal I suppose. The price varies depending on the size of the septic tank and the time it will take to both empty and clean it. Five metres is the accepted distance, but this also depends on the calculated size of the soakaway. BRE Digest 365 is the most commonly used document. And one central Soakaway and we channeled the bathroom and kitchen water to the Soakaway. Make sure it’s adequate for the size of your house and grounds, otherwise it will be overwhelmed. The size of the soak away. Must lay a layer of sand and gravel at the bottom to disperse the effluent flow. A wastewater treatment system is an effective, economical way of treating wastewater from buildings. This is one of. Permission from the EA will only be needed if this discharge exceeds 5m squared. 3 = 2. 4m deep (hit rock) As you can see from the pictures, it looks like clay and certainly acts like clay.