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 Mobile ViewSEPTIC SYSTEM INSPECT DIAGNOSE REPAIR SEPTIC SYSTEM BASICS Septic Guide for Home Buyers or Owners Septic or Sewer Connection? Septic System Design Septic System Designs Master List Septic Inspection Testing Septic Maintenance Repair Septic Component & Product Suppliers Septic Videos ADDITIVES / TREATMENTS for SEPTIC SYSTEMS AEROBIC SEPTIC SYSTEMS ALTERNATING BED SEPTIC SYSTEMS BACKUP PREVENTION, SEPTIC BACKUP PREVENTION, SEWER LINE BACKWATER VALVES, SEWER LINE BIOLOGICAL POLLUTANTS BOOKS, RECOMMENDED SEPTIC BOOKSTORE, SEPTIC SYSTEMS CESSPOOLS CESSPOOL SAFETY WARNINGS CHECK VALVES, WATER SUPPLY CHEMICALS & TREATMENTS for SEPTICS CHLORINE IN DRINKING WATER CISTERNS CLOGGED DRAIN DIAGNOSIS & REPAIR D BOX TROUBLESHOOTING DEFINITIONS OF SEPTIC SYSTEM TERMS DIFFICULT SEPTIC SITES DISTRIBUTION-BOX INSPECTION, SEPTIC DRAINFIELD FAILURE DIAGNOSIS DRIVING or PARKING OVER SEPTIC COMPONENTS? DRYWELL DESIGN & USES EFFLUENT RETENTION TIME FILTERS SEPTIC & GREYWATER FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP FLOODED SEPTIC SYSTEMS, REPAIR GARBAGE DISPOSAL vs SEPTICS GRAVELLESS SEPTIC SYSTEMS GRAVITY/SIPHON DOSING SYSTEMS GREYWATER SYSTEMS DRYWELLS for GRAYWATER DRYWELLS as SEEPAGE PITS DRYWELL SAFETY CONCERNS ARE DRYWELLS DRY? PIT SITE REQUIREMENTS PIT AREA & SIZE PIT CONSTRUCTION DETAILS PIT COLLAPSE or FAILURE HOME BUYERS GUIDE to SEPTIC SYSTEMS HOME SELLERS GUIDE TO SEPTIC INSPECT LAGOON SEPTIC SYSTEMS LAGOON SEPTIC SYSTEMS LEACHFIELD FAILURE DIAGNOSIS MEDIA FILTER SEPTIC SYSTEMS MOUND SEPTIC SYSTEMS NOISE / SOUND DIAGNOSIS & CURE ODORS & SMELLS DIAGNOSIS & CURE ODOR DIAGNOSIS CHECKLIST ODORLESS CHEMICALS / GASES: CHECK FOR? 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This document discusses and describes design specifications for seepage pits and drywells. InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers nor with topics or services discussed at this website.Readers trying to diagnose and deal with sudden soil subsidence or yard collapses should see CESSPOOL SAFETY WARNINGS as those hazards can also apply to drywells and septic tanks, and also see SINKHOLES, WARNING SIGNS. Additional septic system safety warnings are at SEPTIC & CESSPOOL SAFETY. © Copyright 2012 InspectAPedia.com, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use page top links to major topics or use links at the left of each page to navigate within topics and documents at this website. Green links show where you are in a document series or at this website. Site Requirements for septic seepage pits & drywells(i) If soil and site conditions are adequate for absorption trenches, seepage pits shall not be used. (ii) A minimum three foot vertical separation must exist between the bottom of any pit and the high groundwater level, bedrock, or other impervious layer. Design Criteria for seepage pits used to dispose of septic effluent(i) The required "effective seepage pit area" is obtained from Tables 6 and 7 which are shown below. (ii) No allowance for infiltration area is made for the bottom area of a pit or the surface area of impervious soil layers (percolation rate slower than 60 minutes/inch). (iii) The effective diameter of a pit includes the diameter of the lining plus the added diameter provided by the annular ring of aggregate. Any area surrounding the liner with rock smaller than 2 1/2 inches in size shall not be included as part of the effective diameter. (iv) Effective depth is measured from the invert of the seepage pit inlet to the floor of the pit, with the thickness of impervious layers deducted. Site Distance Requirements for Drywells
Effluent Soil Absorption Area Requirements for Seepage PitsThe table below shows the required soil absorption area for seepage pits as a function of soil percolation rate and anticipated daily wastewater flow in gallons.
Seepage Pit Size Requirements to Obtain Necessary Absorption AreaThe table below shows the size of seepage pit necessary in order to provide the required soil absorption area for seepage pits. First use the preceding table to determine the necessary seepage pit absorption area, then use this table (below) to determine the necessary seepage pit size to provide that absorption area.
Questions & Answers regarding this articleQuestions & answers & design specifications: how to design and build a drywell or seepage pit for graywater or septic effluent disposal Ask a Question or Search InspectAPediaHTML Comment Box is loading comments...
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