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SEPTIC SYSTEM INSPECT DIAGNOSE REPAIR
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SEPTIC INSPECTION & TEST GUIDE
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SEPTIC SYSTEM DESIGN ALTERNATIVES
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SEPTIC SYSTEMS, HOME BUYERS GUIDE to
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SEPTIC TREATMENTS & CHEMICALS
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SEWAGE EJECTOR / GRINDER PUMPS
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SINKHOLES, WARNING SIGNS
SOAKAWAY BED FAILURE DIAGNOSIS
SULPHUR & SEWER GAS SMELL SOURCES
TOILETS, INSPECT, INSTALL, REPAIR
TRAPS on PLUMBING FIXTURES
TREATMENTS & CHEMICALS, SEPTIC
VIDEO GUIDES: Septic Videos
WATER CONSERVATION MEASURES
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WATER, WELLS, WATER TANKS: TESTING GUIDE
WASHING MACHINES & SEPTIC SYSTEMS
WASTEWATER TREATMENT BASICS
WINTERIZE A BUILDING
Septic tank design specifications: these model septic design regulations discusses the design specifications for septic tanks, including septic tank size requirements, septic tank cover access, septic tank characteristics, steel septic tanks, tanks for aerobic septic systems, and related details. We discuss septic tank materials, sizes, compartments, strengths, installation details, and special requirements for fiberglass, polyethylene septic tanks, concrete septic tanks, and for aerobic treatment unit construction.
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This document uses the New York State wastewater treatment standard for individual household septic systems (Appendix 75-A) to provide an example of state regulated design and installation of both conventional tank and leach field septic systems and alternative septic system designs, including raised septic systems, septic mound systems, intermittent sand filter septic systems, and evaportion-transpiration septic systems. Effective Date: 12/01/90 Title: Appendix 75-A.6 -
(a) General information about Septic Tank Design
(1) Septic tank capacities shall be based upon the number of household bedrooms. An expansion attic shall be considered as an additional bedroom.
Notice: a thorough table of septic tank size requirements and methods for calculating septic tank size are found separately at SEPTIC TANK SIZE.
Table 3 specifies the minimum septic tank capacities and minimum liquid surface areas
TABLE 3 MINIMUM SEPTIC TANK CAPACITIES NUMBER OF MINIMUM TANK MINIMUM LIQUID BEDROOMS CAPACITY (GALLONS) SURFACE AREA (SQ. FT.) ------------ ------------------- ----------------------- 1, 2, 3 1,000 27 4 1,250 34 5 1,500 40 6 1,750 47
NOTE: Septic tank size requirements for more than six bedrooms shall be calculated by adding 250 gallons and seven square feet of surface area for each additional bedroom. A garbage grinder shall be considered equivalent to an additional bedroom for determining tank size.
(2) Septic tank covers shall always be accessible. Where manholes are more than 12 inches below final grade, an extension collar shall be provided over each opening. Extension collars shall not be brought flush with the ground surface unless the cover can be locked to prevent tampering. Driveways or other facilities shall not be constructed above septic tanks unless specially designed and reinforced to safely carry the load imposed.
(b) Design and Installation of Septic Tanks
(1) General Requirements for Septic Tanks.
The following applies to all septic tanks regardless of material.
(2) Design Specifications for Multi-compartment septic tanks or tanks in series.
(3) Design Specifications for Concrete septic tanks
(4) Design Specifications for Fiberglass and Polyethylene Septic Tanks
Fiberglass or polyethylene (plastic) septic tanks must meet the following additional requirements:
(5) Design Specifications for Steel Septic Tanks
Steel septic tanks must have a label indicating corrosion protection complying with Underwriters Laboratories, Inc., Standard UL-70 or equivalent.
(6) Design specifications for Aerobic Septic Septic Tanks or Aerobic Treatment Units (ATUs)
A homeowner may choose to install an aerobic unit instead of a septic tank under the following conditions:
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