2 Residential Wastewater Characteristics 50 4. 5 and 9. Soak Pit’s Function. Applicability: A Soak Pit exposed to raw wastewater will quickly clog. wastewater retention time of 1 to 2 days. 5 Sewage - The liquid waste of a household or community including human excreta. 1 Estimating of septic tank, soak pit. Open navigation menu. Do not store it for longer than 48 hours as bacteria growth will start to affect the quality of the water. Soak pits are very low in cost for construction, operation and maintenance. 2. This Appendix will explain how to design soak pits and infiltration trenches. Take sludge settled down per person – 30 liters/year. Based on this the diameter of the soak pit is given as 1. SO. in consultation with the community leaders, can design and implement a solution. Capacity of tank required = 80000/24*18 = 60000lit. Soak pit Design The soak pit, consisting basically of a simple pit (generally approximately 1m3), should be between 1. The design of the community soak pit is according to the population of village. 51 TABLE 2: Construction requirements for. 5 and 4 m deep, but as a rule of thumb, never less than 2 m above the groundwater table. Soak Pit - Function, Types & Design. The solids being heavier than the waste liquids, settles down at the bottom of the. Gravel and stone beds are called infiltration trenches or stone swales when used for stormwater control. 4). Prior two are of rectangular shape and later is generally of circular shape. However,. Ujjain ’ s ‘ drainage system included soak-pits built of pot- tery-ring or pierced pots ’ ( Kirk : 32), and it has been supposed that ring-wells were used for the disposal of waste-Typically, the pit is at least 3 m deep and 1 to 1. understand the physical design of their system and, secondly, to understand the need and the procedures for. 4. The wastewater management systems were adaptable to the cultural and economic conditions of the society. Its primary function is to allow wastewater to gradually percolate into the surrounding soil, where natural processes help treat and filter the effluent before it. infiltration is likely to be severely limited. Soak pit are best suited to soils with good absorptive properties; clay, hard packed or rocky soils are not appropriate. It. However, Distance between the bottom of the soak pit and groundwater level is 6’7″ and more. V₁ = N * Q * T. These tables do not cover all possible options. Contents [ show] WasteWater. 0 m × 3. Anaerobic bacteria decompose the sludge during this time, resulting in sludge. A soak pit, also known as a soakaway or septic tank soakaway, is a simple and effective way to manage wastewater from a household or small-scale development. 5 m diam eter and depth of 3 m trench with 3. The Waimakariri District Council has responsibility for the following functions: Urban stormwater. SOAK PIT : A pit, dug into permeable soil lined to form a covered perforated chamber or filled with sand at the bottom and gravel or broken bricks at the top into which effluent from septic tank or storm water. Septic tanks are suitable for conditions where the wastewater can drain away and be absorbed into the soil . Keywords. Dry wells (also known as soakaway pits, soakwell, or soak pit), is one of the earliest models of a water runoff management system. Many people prefer a. Soak pits are. Using a soak pit will help you cut down on the amount of contaminated water released into the environment. 5 to 3 yrs. The depth of the soak pit must be between 1. 0. (pits, chambers and trenches) that allow infiltration to the ground through their base and sides and that incorporate below ground storage. Typically, the pit is at least 3m deep and around 1m in diameter. It helps in collecting and disposing of wastewater safely away from the house. , 2014). low-tech solution for discharging wastewater. The soak pit must be constructed where the site does not gather surface ruff off the water, which leads to clogging of the soak pit resulting in water stagnation. Settling and anaerobic processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as “primary treatment”). The volume of sewage settlement. Based on this 24. While dried feces and urine harvested. , 2014Read- Homemade septic Tank Design! Soak Pit Size. ALL DIMENSIONS IN MILLIMETRES UNLESS OTHERWISE INDICATED 1. 20m(L) x 1. the wastewater to pass through. Basic Design Consideration Of Soak Pit. T is the detention time ( 1 to 3 days) IF not given take T = 1 day. well in Australia and known as a soak pit in India. _____ should not be placed near water body. 2021). size should be as per requirement. Please like,share,comment & subscribe my channel,,for support !!!!! This video is about design of Septic tank & soak pit for any nos of people. 2. In areas where the ground water level below 4m a soak pit can be used. In this Video I will explain about soak pit | soak pit construction | soak pit for septic tank | soak pit for wastewater #SoakPit-----. 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. Normally, the chambers are all of the same depth (between 1. In this article, What is Soak Pit, Meaning, Purpose, Need, Advantages and Disadvantages, Estimate of Soak Pit Excel, Quantity, Design, Construction Procedure, Health. Part B. at community level as a measure for management of the greywater generated. 48 KLD greywater is produced. Infiltration area (iA): The surface area required to infiltrate the amount of wastewater entering the pit. A septic tank is a wastewater treatment system that separates solid waste from liquid waste and allows the liquid to flow out for further treatment or disposal. However, discharging effluent water into the environment after partial treatment through a soak pit is a safer option. (b) Design and Installation. ing and rocks and gravel for filling a soak pit. A soak pit is an underground structure designed to manage water drainage efficiently. ALL parts of the soakaway drainage field are required to be a minimum of: 10m from a watercourse or ditch. 80 m, depth = 4. A sullage pit keeps the wastewater in one place and encourages it to soak quickly into the ground. A tight tank is a sealed container. Q = 120 litre/ day; For continuous water supply. B Y S W A P N I L PA U L INTRODUCTION • Septic tank is the underground, onsite, small scale sewage treatment setup, which collects the sewage for the decomposition activity by bacterial action. 2. Wastewater is made up of 99 percent water and about 1 percent. • Solid products accumulate in the pit-action of time and temperature- degraded and pathogen. Today I'm going to show you Exactly how to build a strong Soakaway pit or leachpit or soakpitIs a flooding Bathroom dangerous?Yes If the Bathroom over floods. 2 The Standard originates from a review of available information on the fate and transport of road contaminants and the design of existing road soakaway systems. Design Considerations:Despite the low rate of sewer service coverage in developing countries, especially in small towns and rural areas, decentralized wastewater treatment systems (DEWATS) are alternatives to ensure public health. A suit-An onsite wastewater treatment system is a unique system that combines a septic tank and a soil absorption field. Keep it. The wastewater generated in the house from the kitchen and […] A soak pit is frequently offered for such partial treatment. Some primary considerations that must be taken while designing or constructing the soak pit, as follows: 1. 1. Detention period = 24 hour. Introduction to Sanitation Technologies 13 Understanding Sanitation Technologies 15 On-Site Systems 18 Off-Site and Hybrid Systems 21 Treatment of Wastewater and Fecal Sludge 22 Reuse of Treated Wastewater and Sludge 25 Summary of Common. The filled up pit can be conveniently emptied after 1. It contains the following information: Design tables for soak pits and infiltration trenches. T he budget of soak pit is around 2000 rupees for each soak pit and constructed within two days with the help of two workers. Sanitation_SoakPitDesign - Read online for free. The area of the soak pit does not include the base. Modify or Operate a Small Wastewater Facility” shall remain covered under those permits. The soak pit has proved transformative in the management of wastewater in the area. R. The wastewater generated in the house from the kitchen and […] March 11, 2020. REFER TO ANNEXES 5 AND 5. Domestic Wastewater Wastewater with a measured strength less than high strength wastewater, which is discharged fromSoakage Pit. Ensure access for emptying of tanks by vacuum tanker, as well as availability of sludge treatment and disposal. Soak pits are appropriate technology for rural and suburban areas. As a result, most septic tanks do not conform to the recommended design. hold point – the contractor shall carry out soakage testing in accordance with the auckland soakage design manual at the proposed soakage pit location with the engineer in attendance. g. (An Unit Of Birama Construction) prepares your soak pit design that offers an economic opportunity for waste-water management. Once that water has been used in your bathroom, kitchen, laundry and outside, it flows out through private plumbing into the public wastewater network. An application to vary the design requirements for soakage pits or tunnels will be considered based on an examination of theProvides technical information on onsite wastewater treatment and disposal systems for those who design, construct, operate, and maintain wastewater systems. The soak pit is either left empty or filled with boulders or gravel, which will help prevent walls from collapsing, but still has adequate space for wastewater. The area of the soak pit does not include the base. Soak Pit must be placed at a distance of 30m (at least 20m) from. Design The design of a septic tank aims to: • produce a tank in which wastewater is contained for long enough for the maximum removal of suspended solids; • prevent suspended solids from being discharged with the effluent; • provide sufficient space for the sludge and scum to accumulate between desludging;Your design should: Contain wastewater long enough for maximum removal of suspended solids. com for any support, inquiry or product-purchase related query. 85 = 10200 lit/day. Installation of soak pits is also recommended near hand-pumps, stand posts, etc. 3. 8 Leach Field 154 D. As wastewater flows through the. Effluent from the septic tank is not pure thus needs further treatment for which it is sent to the soak pit. 3. A soakaway system normally includes screens, a catch pit, a septic tank, soakaway pit and trenches, and the associated dung channels. tSt2410(Partl)-1985 2. These are used for the discharge of domestic and industrial wastewater. If there is no intention or need to reuse wastewater, collected rainwater or gray water, immersion pits can offer an economic opportunity for partial treatment of waste-water or ash from a primary treatment (eg septic tank, double pits for flush toilets, biogas collector, deflector anaerobic reactor, etc. A soak pit is often constructed to be 1. New construction or modification of existing facilities following the effective date of this regulation must obtain authorization under a new permit. an older style septic tank and soakage trench or soak hole system; a new modern septic tank and land application system (such as dosed trenches, or. 8–7. This standard covers the design and construction of septic tank for small installations (up to 20WasteWater. Materials such as grease and oil float to the surface in the tanks to form. The essential functions of a septic tank are: • To collect. It is commonly used in areas where the soil has good percolation rates, allowing for effective filtration and treatment of effluent. These smaller particles are digested by microorganisms, resulting in a long-term degradation process. Percolation test waiver procedures. Design Consideration of Soak Pit. Most of the wastewater management system needs a soak pit for this partial treatment and the partial treatment of effluent water through a soak-pit is a. Maintaining your wastewater system. Deep pits can last up to 20 or more years. 2. The soak pit discharge clear and non-harmful water to the ground. Calculate: A sp (area of base of soak pit) = 5. Milk and butter factories have effluents with active reaction close to neutral (pH=6. A factor of safety of 0. Design Considerations of Soak Pit Design. It should be remembered that the depth should not be taken below the water table; The diameter of the pit depends on the volume of effluent and the. ] The writers of the Health Act put it mildly: cesspits and drywells, when used for receptacles of human waste, are a nuisance. The wastewater generated in houses like water used for bathing, washing clothes and utensils is commonly disposed in this pit. A soak pit is known as soak way or leach pit, is a covered, porous-walled chamber that allows water to slowly soak into the ground. 4 meter cube [Since, 1000 liters = 1-meter cube of water] Step2:- Assume the liquid depth of the tank. Capacity required for Sludge accumulation = 10 x 6x 40 = 2400 lit/ year. Ideally, the recommended distance of a soak pit from the drinking water source is 3. In this Video I will explain about soak pit | soak pit construction | soak pit for septic tank | soak pit for wastewater #SoakPit-----. A soak pit is a covered, porous-walled chamber that permits water to soak into the ground slowly. Environmental Engineering/Policy Program. All onsite wastewater systems need to dispose of the water used in your home. Since the Soak Pit is odourless, installed underground and wastewater kept away from human contact, even the most sensitive communities may have little acceptance issues. Opening a pit to expose the soil profile is ideal to allow. of cement P211=0. Where N is the number of the user. Example - Design of Septic Tank for 20 Users Liquid capacity of the tank: @120lts per user = 0. Capacity testing and policy applicable to vertical seepage pits. 5 sqm per head of the user. The technology is located underground and thus, humans and animals should have no contact with the. Intermediate. A soak pit is constructed in the ground by the dry brick and open joints in a circular shape. In a conventional septic tank system, the collected effluents in the tank flow to the soil adsorption field for final. By utilising a soak pit, you can reduce the amount of contaminated water being released into the. B4-4 Soak Pit B5-1 Dimensions of No-Exit Road Turning Areas B5-2 Turning Areas for No-Exit Roads B5-3 Parking Bay B5-4 Subsoil drains - Roadside B5-5 Typical Swale Detail. A soakaway system normally includes screens, a catch pit, a septic tank, soakaway pit and trenches, and the associated dung channels. Step 4: Calculate the Septic Tank CapacityDesign a cost-efficient soak pit that should not negatively affect soil and groundwater properties and avoid high daily volumes of discharged effluents with the following points: Soakpit needs to be designed for a small family in a rural area having 4-5 members as daily users. Let take @120 liters per user as i have told you to consider above. Step-by-step sample. There are the following considerations for the design of a soak-pit such as; It should be between 1. Wastewater flows into the tank at one end and leaves it at. So we are briefly describing soak pit design and providing structural design for soakwell in AutoCAD. The following applies to all septic tanks regardless of material. FREE SEPTIC TANK DESIGN DOWNLOAD. 900mm 250mm. 6 of Clause E1 of the NZ Building Code to ensure that surface water is discharged without overflowing. ) So: V stor = 0. 1. Design Considerations of Soak Pit 1. The depth varies from 3-5m. Septic tank process&design - Download as a PDF or view online for free. In Auckland managing rain or so called “Stormwater” correctly is critical for the cities growth and. Based on this 24. 2 metres from a boundary. Soak Pit Design. 2. Pre-settled effluent from a collection and storage/treatment or (semi-) centralized. 8 m2 WA =Wall Area DF = Daily Flow SIR = Soil infiltration rate (See table 1). The septic tank section is responsible for treating the wastewater naturally by separating the solid waste from the liquids. Explanation: Soak pit is a circular pit through which sewage is disposed in the soil. ie. Soak pits are used for soils where. A soak pit is generally a circular porous covered pit, through which the effluent or wastewater is allowed to be absorbed into the surrounding soil if there is no need to reuse it. So here we take sludge removal 2 years once. Septic tank,soak pit and gi sheet design Alok Kumar. These unsafe disposal is one of the ambiguities to maintain ourINDIVIDUAL HH SOAK PIT – TYPE DESIGN. Hospital wastewater may contain various potential hazardous materials including, microbiological pathogens, radioactive. Designing pit latrines- 75 Latrine Design Project (design for construction site) 12:30 – 1:30 Lunch Lunch Lunch Lunch Lunch 1:30 – 3:00 Finish Sanitation and Disease Sanitation Perceptions- 45 Pit latrines- 45 SanPlat Construction -A urine-diverting dry toilet (UDDT) is a type of dry toilet with urine diversion that can be used to provide safe, affordable sanitation in a variety of contexts worldwide. These will slowly decompose and can be harvested as a soil amendment on. A = Stabilization pond B = Soak away pit. to treat wastewater and to design a suitable loading rate for a site. While a septic tank treats and discharges water, a soak pit simply allows water to soak into the ground. I. 2. 4. A Soak Pit is a very low-cost and low-tech solution for discharging wastewater. 38 × 30 m 3 = 11. Depending on where you live, your waste water either goes to a public sewer (also known as urban. METHODOLOGY The study was planned during the discussion with the facility about the soak pit undergoing the partial treatment of the effluent water coming out of primary treatment unit. Soil absorption system Seepage pit or soak pit: unlined and filled with stone or brick 50 SEPTIC TANK 51. , 2014 Read- Homemade septic Tank Design! Soak Pit Size. They work by allowing bacteria, fungi and micro-organisms to breakdown, digest and clean the waste water to the point where it can be safely discharged. In plants where a certain amount of whey is discharged, the pH of the effluent is reduced to below 6. The wastewater may be from toilets only (sewage), or include sullage (wastewater from kitchens, laundries and bathrooms, also called ‘greywater’). 3 Disposal of sullage wastewater. This is useful for absorbing small amounts of clean water such as the runoff from an outdoor shower or a swimming pool. Soak pit construction procedure. Steel: TMT (Thermo Mechanically Treated) steel. AS/NZS 1546. Stone-filled Dry Well. •Disposing excreta into the dispersion system like soak pit/leaching pit. Soakaway Pit:- Means any pit or any other underground construction designed for seepage of the treated wastewater into the ground by infiltration or percolation. Q is the rate of water supply. A soak-pit is a closed porous chamber that is directly. The wastewater generated in the. DISPOSAL OF EFFLUENT FROM THE SEPTIC TANK. Does not cover the design of soak pits with overflows discharging to outfalls. The soak pit is to be a hole filled with rocks. Very low on cost and a simple design for on. It is possible to also link a septic tank with a cesspit, such that the cesspit receives the effluent from septic tank. DEWATS (Decentralized Wastewater Treatment System) is a wastewater treatment system that is both cost-effective and efficient, especially in poor nations. 7 Surface Water - The run-off from precipitation and other water that flows over surface of. It should be. WA = DF / SIR e. Health Aspects. See full list on civiconcepts. Distances for these onsite wastewater treatment components are given in feet to other site features unless otherwise stated (a few distances may be given in inches). Wastewater from the primary treatment unit will not be reused. A Soakage Pit is a covered, porous-walled chamber that allows water to slowly soak into the ground. Containment (septic tank and soak pit): The septic tank is sealed and impermeable but the soak pit is permeableSoak Pit Design. SPECIFIED DESIGN OF THE SOAK PIT Fig :8 PROPOSED DESIGN VI. Abstract. WA = DF / SIR e. if possible to avail for both sewage/domestic water. Design Considerations of Soak Pit Design. Soak Pit: A soak pit is a dug-out pit that is filled with graded stones and gravels. 4. The soak pit should be covered by the precast slab. Capacity of tank required = 10200/24 x 24 = 10200 lit. The effluent can be removed in a soak pit. If you do not have a central collection facility, how do you dispose of your wastewater? A = Wastewater soak away pit B = Open discharge on the surface C = Irrigate vegetables D = Others (specify)A soak pit is a covered, porous-walled chamber that allows water to slowly soak into the ground and also known as a soak away or leach pit, and the pre-settled sewage from the septic tank is release to the underground chamber from where it infiltrates into the neighboring soils. (ii) Discharge into other soil absorption systems as soak pit or seepage pits and leaching cess-pools. Original. As a result of the implementation of this work, approximately 200 litres of grey water/wastewater per school is being recharged into ground on a daily basis, and 53 schools have been benefitted. The length of the septic tank should be 2 to 4 times the width. wastewatermanagement,toprotectpublichealthandtheenvironment. Figure 6. pvc sn16 unless noted otherwise. . When wastewater is discharged into a soak-pit, it slowly soaks into the ground. This set of Civil Engineering Drawing Multiple Choice Questions & Answers (MCQs) focuses on “Design of Septic Tanks”. The householder should keep a record when each of the two pits is put to use, disconnected and emptied; a card supplied by the local authority should be used for this purpose. These can be lined (like aA soak pit is a fairly old-fashioned method of dealing with household wastewater and sewage. The discharge of domestic wastewater into or on to land from an on-site wastewater treatment and disposal system lawfully in existence at the time that this rule comes into effect is permitted provided: (a) The design flow shall be no greater than 2 m3/d. It offers a lot of potential in terms of establishing a long-term environmental sanitation system. Compared to a soak pit, the leach field might be somehow safer, but is considerably more sophisticated in its construction. Capital: R7 000-R8 500. Appendix 3 - Design Calculations for Soak Pits and Infiltration Trenches – Tables and Equations Introduction to Low Cost Sanitation Participant Manual Appendix 3 A3 - 1…The soak away pit is of natural earth at the bottom which allows the wastewater to naturally drain the liquids down into the earth. 33 Soak-away - A pit, dug into permeable ground lined to form a covered perforated chamber or filled with hard-core, to which liquid is led,. The Soaking pit should be raised above ground level and surface water should not enter into the soak pit. Certain design mandates are to be ensured for design of soak pits such as the depth of the soak pit should be between 1. Minimum soakaway drainage field distances. A soak hollow is one covered, porous-walled chamber that allows water to slowly soak into the ground. Where the community lives near dams or river banks that frequently burst during the rainy season. In a conventional septic tank system, also called ‘septic system’, a subsoil dispersion system such as the soak pit or dispersion trenches follow the septic tank. 4. Many people prefer a rectangular type. if possible to avail for both sewage/domestic water. fAAETI. A Soak Pit does not provide adequate treatment for raw wastewater and the pit will clog quickly. Design of septic tank with soak pit for 30 users are as follows: Design of Septic Tank Assume, rate of water supply = 135 lit/capita/day. The method used is not land and gutters which creates unhygienic condition only disposes the wastewater but also increases the ground which causes different diseases to people living water. Soak Pits are designed to discharge pre-set-tled blackwater or greywater. Safety measures. Sewers should be laid at least 3. V₁ = N * Q * T. The soak pit should be covered by the precast slab. If the pit diameter exceeds 1. 5 to 2 years, when most of the pathogens die off. A new on-site design should be able to function within the limited space limitations, which are often not sufficiently addressed by the current sanitation policy. Step-by-step sample calculations with full solutions. Using a soak pit will help you cut down on the amount of contaminated water released into the environment. The activated sludge is subsequently separated from the treated wastewater (mixed liquor) by settlement, and most of it is returned to the process. Design Principals Septic tank * Aqua privy – a variation of the septic tank Simplified septic tank Only one chamber (settling chamber) Biogas is vented trough a pipe Supernatant is used to protect as a seal for the sludge to prevent smell, flies etc. A cesspit is technically a wastewater device, although the terms are often used interchangeably Catchment Area Describes an area of land where the stormwater runoff would flow to a discharge point at a watercourse or the sea. For safety, an excavator (backhoe) is usually used to dig the pit to five-feet. It must not be constructed nearby a drinking water source as it can pose contamination of the drinking water source. Rural drainage: Council maintained drains can be viewed on the rural drainage areas map. If there is no intention or need to reuse wastewater, collected rainwater or gray water, immersion pits can offer an economic opportunity for partial treatment of waste-water or ash from a primary treatment (eg septic tank, double pits for flush toilets, biogas collector, deflector anaerobic reactor, etc. The wall of a Soak Pit is constructed with half concrete blocks joined while the. CONCRETE PIPES SHOULD. 2. DESIGN MANUAL: SEWAGE DISPOSAL SYSTEMS IN PRINCE GEORGE’S COUNTY . The putrescible and highly odorous effluent from the septic tank requires to be properly treated and disposed. Purpose : To collect wastewater from dung channels and to facilitate removal of solid matters. This page contains information about the district’s water supplies and sewer services and what you need to do to connect to those services. Designing a complete layout. If there is no intention or no need to reuse wastewater, collected stormwater or greywater, soak pits can offer a cost-efficient opportunity for a partial treatment of waste- grey- or stormwater from a primary treatment (e. However, you as the applicant are responsible for the application of the Manual to your site and making the decision regarding which soakage system is adopted as required. However, you as the applicant are responsible for the application of the Manual to your site and making the decision regarding which soakage system is adopted as required. Soak pits or infiltration trenches that intercept the water table will fill rapidly and are unlikely to cope with large volumes of wastewater. it then goes directly to the soak pit, which is the last chamber of the biodigester. Step1:-Calculate the liquid capacity of the tank. Design. 1. This option is applicable only in areas of low settlement density and where soils have a high ability to drain effluent away. A Soak Pit should be used for discharging pre settled black water or grey water. The greywater that passes through the soak pit is filtered. hydraulic conductivity of the soil. The retention time is the duration for which the wastewater remains in the septic tank for treatment before it overflows to the soak pit or drainage field. The soak pit is either left empty or filled with boulders or gravel, which will help prevent walls from collapsing, but still has adequate space for wastewater. •The flow and characteristics of the wastewater that can be considered for design of septic tank is presented in the Table. Soak Pit - Function, Types & Design. Effluent from septic tank disposal Soak pit/ Cess pool A closed circular or rectangular pit through which effluent will be soaked or absorbed into the surrounding soil Two- Filled or Empty type. It is a simple design consisting of a PVC pipe containing two valves and can be built using locally available materials. So soak pits are preferred where the soil is porous in nature. It should be located at a safe distance from a drinking water source (ideally more than 30 m). Soak Pit Design. Soak pit drawing for diploma Civil 3rd year 5th semester@rajnishkumarofficialcivile9643 Video highlights soak pit drawing drawing of soak pit soak pit #diplo. The scum, composed of waste that’s lighter than water, floats on top. The soak pit’s wastewater infiltration can be used to recharge the groundwater. An Absorption well also known as a soak pit or a Resapan (in Indonesian) has three main uses. 5 and 4 m deep, but, as a general rule, never less than 2 m above. The recommended retention time is usually 1 to 3 days, depending on the local regulations and the tank’s design. 16 C = Open discharge or surface D = Drainage channel. The soak pit should be kept away from high-traffic areas so that the soil above and around it is not compacted. A cesspit (cesspool) is a holding tank (or pit) built. AdvantagesS. Gravel and stonebeds. INLET AND OUTLET TEES. But these guidelines are only suggestive, not binding. •Septic tanks can be made from concrete, masonry or fiberglass.