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 Mobile ViewSEPTIC SYSTEM INSPECT DIAGNOSE REPAIR ADDITIVES / TREATMENTS for SEPTIC SYSTEMS AEROBIC SEPTIC SYSTEMS ALTERNATING BED SEPTIC SYSTEMS BACKUP PREVENTION, SEWER LINE BIOLOGICAL POLLUTANTS BIOLOGICAL POLLUTANTS in the HOME - EPA BOOKS, RECOMMENDED SEPTIC BOOKSTORE, SEPTIC SYSTEMS CESSPOOLS CESSPOOL SAFETY WARNINGS CHECK VALVES CHEMICALS & TREATMENTS for SEPTICS CHLORAMINE / CHLORINE Tests CHLORINE IN DRINKING WATER CHLORINE IN SEPTIC WASTEWATER CISTERNS D BOX TROUBLESHOOTING DEFINITIONS OF SEPTIC SYSTEM TERMS DIFFICULT SEPTIC SITES DRAINFIELD FAILURE DIAGNOSIS DRIVING or PARKING OVER SEPTIC DRYWELL DESIGN & USES 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 HOME BUYERS GUIDE to SEPTIC SYSTEMS HOME SELLERS GUIDE TO SEPTIC INSPECT 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? ODORS, PLUMBING SYSTEM ODORS, SEPTIC or SEWER ODORS, SULPHUR SMELL SOURCES OUTHOUSES & LATRINES PLANTS & TREES OVER SEPTIC SYSTEMS PRESSURE DOSING SEPTIC SYSTEMS RAISED BED SEPTIC SYSTEMS SAND BED SEPTIC SYSTEMS SEEPAGE PITS SEPTIC & CESSPOOL SAFETY SEPTIC SYSTEM ARTICLES SEPTIC AUTHORITIES 75-A.0 New York State Regulation of Private Septic Systems 75-A.1 Introduction to Septic Systems, Definitions of Septic System Terms 75-A.2 Regulation of Sewage Treatment Systems by other agencies 75-A.3 Sewage flows and design flow estimates 75-A.4 Soil and site appraisal for Septic Systems 75-A.5 House or building sewer line specifications 75-A.6 Septic tank capacity requirements, installation, and placement 75-A.7 Distribution lines, distribution boxes, gravity flow, pressure distribution, dosing, siphons 75-A.8 Subsurface treatment of effluent, absorption field requirements, leach field design criteria 75-A.9 Alternative Septic System Designs Raised Septic Bed Septic Mounds Sand Septic Filters Evaporation Septics 75-A.10 Other systems 75-A.11 New product/system design interim approval SEPTIC BACKUP PREVENTION SEPTIC BACKUP REPAIR SEPTIC BOOK, ONLINE SEPTIC BOOKSTORE SEPTIC BIOMATS SEPTIC CARE INSTRUCTIONS SEPTIC CLEARANCE DISTANCES SEPTIC CODES & REFERENCES SEPTIC CONSULTANTS SEPTIC D-BOX INSPECTION SEPTIC DRAINFIELD FAILURE DIAGNOSIS SEPTIC DRAINFIELD INSPECTION & TEST SEPTIC DRAINFIELD LIFE SEPTIC DRAINFIELD LOCATION SEPTIC DRAINFIELD RESTORERS? SEPTIC DRAWINGS SEPTIC DYE TEST PROCEDURE SEPTIC FAILURE LAWSUIT SEPTIC FAILURE SIGNS SEPTIC FIELD INSPECTION SEPTIC FILTERS SEPTIC FLOOD RESPONSE SEPTIC INSPECTION BOOK SEPTIC INSPECTION & TEST GUIDE SEPTIC LIFE EXPECTANCY SEPTIC LIFE MAXIMIZING STEPS SEPTIC METHANE GAS SEPTIC ODORS SEPTIC PUMPS SEPTIC PUMPING REPAIR SEPTIC REFERENCES SEPTIC & CESSPOOL SAFETY SEPTIC SUPPLIES & PARTS SEPTIC SYSTEM DEFINITIONS SEPTIC SYSTEM DESIGN ALTERNATIVES Master List of Septic System Types ALTERNATIVE SEPTIC DESIGNERS ALTERNATIVE SEPTIC PRODUCTS AEROBIC SEPTIC SYSTEMS ALTERNATING BED SEPTIC SYSTEMS BIOGAS PRODUCTION & USE CESSPOOLS DISINFECTION SYSTEMS, SEPTIC EFFLUENT DRYWELL DESIGN & USES EVAPORATION-TRANSPIRATION SEPTIC SYSTEMS FILTERS SEPTIC & GREYWATER FIXED-FILM PROCESS SEPTIC SYSTEMS GRAVELLESS SEPTIC SYSTEMS GRAVITY/SIPHON DOSING SYSTEMS GREYWATER SYSTEMS HOLDING TANK SEPTIC SYSTEMS LAGOON SEPTIC SYSTEMS MEDIA FILTER SEPTIC SYSTEMS MOUND SEPTIC SYSTEMS OUTHOUSES & LATRINES PEAT FILTER SEPTICS PRESSURE DOSING SEPTIC SYSTEMS RAISED BED SEPTIC SYSTEMS SAND BED SEPTIC SYSTEMS SEEPAGE PITS SEPTIC SYSTEM PUMPS SEQUENCING BATCH SEPTIC SYSTEMS SEWAGE TREATMENT SYSTEMS STEEP SLOPE SEPTIC DESIGNS TOILET ALTERNATIVES TOILET TYPES Toilet Types, Flush Methods TOILETS, DON'T FLUSH LIST TRAPS on PLUMBING FIXTURES VEGETATED SUBMERGED SEPTIC BEDS Wastewater Treatment Levels Wastewater Dispersal Methods WETLAND SEPTIC SYSTEMS SEPTIC SYSTEM DESIGN BASICS DRYWELL DESIGN & USES FILTERS SEPTIC & GREYWATER SEEPAGE PITS SEPTIC CLEARANCES SEPTIC SOIL & PERC TESTS SEPTIC TANK SIZE SEPTIC TANK DEPTH SEPTIC TANK TEES SEPTIC DRAINFIELD SIZE SEPTIC DRAINFIELD SHAPE SEPTIC TANK PUMPING FREQUENCY SEPTIC TANK PUMPING PROCEDURE SEPTIC SYSTEM PUMPS SEPTIC TREATMENTS & CHEMICALS STEEP SLOPE SEPTIC DESIGNS SEPTIC SYSTEM DESIGN MANUAL - Online SEPTIC DRAINFIELD FAILURE DIAGNOSIS SEPTIC DRAINFIELD INSPECTION & TEST SEPTIC DRAINFIELD LIFE SEPTIC DRAINFIELD LOCATION SEPTIC DRAINFIELD RESTORERS? SEPTIC DRAWINGS SEPTIC DYE TEST PROCEDURE SEPTIC FAILURE LAWSUIT SEPTIC FAILURE SIGNS SEPTIC FIELD INSPECTION SEPTIC FILTERS SEPTIC FLOOD RESPONSE SEPTIC INSPECTION BOOK SEPTIC INSPECTION & TEST GUIDE SEPTIC LIFE EXPECTANCY SEPTIC LIFE MAXIMIZING STEPS SEPTIC METHANE GAS SEPTIC ODORS SEPTIC PUMPS SEPTIC PUMPING REPAIR SEPTIC REFERENCES SEPTIC & CESSPOOL SAFETY SEPTIC SUPPLIES & PARTS SEPTIC SYSTEMS, HOME BUYERS GUIDE to SEPTIC SYSTEM INSPECTION & TEST GUIDE SEPTIC SYSTEMS INSPECTION COURSE SEPTIC INSPECTION TYPES & LEVELS SEPTIC FAILURE CAUSES SEPTIC TANK GRASS or SNOWMELT SEPTIC TANK INSPECTION PROCEDURE SEPTIC DRAINFIELD FAILURES SEPTIC D-BOX INSPECTION SEPTIC DRAINFIELD INSPECTION SEPTIC DYE TEST PROCEDURE SEPTIC FAILURE CAUSES SEPTIC FAILURE CRITERIA SEPTIC FAILURE SIGNS SEPTIC FAILURE SPOTS SEPTIC INSPECTION WORK SHEETS SEPTIC INSPECTION TYPES & LEVELS SEPTIC SYSTEM ODORS SEPTIC SYSTEMS ONLINE BOOK SEPTIC SYSTEM PUMPS SEPTIC SYSTEM SAFETY WARNINGS SEPTIC SYSTEM TYPES, MASTER LIST SEPTIC TANKS SEPTIC TANK BAFFLES SEPTIC TANK COVERS SEPTIC TANK, HOW TO FIND SEPTIC SEARCH SAFETY WHO KNOWS SEPTIC LOCATION? FIND MAIN WASTE LINE EXIT DISTANCE TO SEPTIC TANK POSSIBLE SEPTIC TANK LOCATIONS VISUAL CLUES LOCATE the SEPTIC TANK WHERE TO LOOK for the SEPTIC TANK SEPTIC TANK DEPTH SEPTIC TANK LOCATING EQUIPMENT SEPTIC TANK LOCATION SKETCH SEPTIC TANK GRASS or SNOWMELT SEPTIC TANK INSPECTION PROCEDURE SEPTIC TANK LEAKS SEPTIC TANK LEVELS of SEWAGE SEPTIC TANK PUMPING SCHEDULE SEPTIC TANK PUMPING PROCEDURE SEPTIC TANK SAFETY SEPTIC TANK SIZE SEPTIC TANK TEES SEPTIC TESTS: DYE & LOADING TESTS SEPTIC TREATMENTS & CHEMICALS SEWAGE & SEPTIC CONTAMINANTS SEWAGE BACKUP, WHAT TO DO SEWAGE BACKUP TEST & CLEANUP SEWAGE BACKUP PREVENTION SEWAGE CONTAMINATION in buildings SEWAGE CONTAMINANTS in FRUIT / VEGETABLES SEWAGE EJECTOR / GRINDER PUMPS SEWAGE LEVELS in SEPTIC TANKS SEWAGE NITROGEN CONTAMINANTS SEWAGE PATHOGENS in SEPTIC SLUDGE SEWAGE PUMPS SEWER BACKUP PREVENTION SEWER GAS ODORS SEWER LINE REPLACEMENT SINKHOLES, WARNING SIGNS SMELL PATCH TEST to Track Down Odors SOAKAWAY BED FAILURE DIAGNOSIS SULPHUR & SEWER GAS SMELL SOURCES SUMP PUMPS TOILETS, INSPECT, INSTALL, REPAIR TOILET ALTERNATIVES TOILET FLUSHOMETER VALVES TOILET INSTALLATION PROCEDURE TOILET OVERFLOW EMERGENCY TOILET PLUGS, SEWER BACKUP TOILET REPAIR GUIDE TOILET TYPES Toilet Types, Flush Methods TOILETS, DON'T FLUSH LIST TRAPS on PLUMBING FIXTURES TREATMENTS & CHEMICALS, SEPTIC VIDEO GUIDES: Septic Videos WASHING MACHINES & SEPTIC SYSTEMS WASTEWATER TREATMENT BASICS WATER, WELLS, WATER TANKS: TESTING GUIDE WATER PURIFIERS WATER QUALITY TESTS, CONTAMINANTS, TREATMENT WATER QUANTITY IMPROVEMENT WATER QUANTITY USAGE GUIDE WATER SOFTENERS & CONDITIONERS WATER SUPPLY & DRAIN PIPING WATER TESTS, CONTAMINANTS, TREATMENT WATER TREATMENT EQUIPMENT CHOICES WELLS CISTERNS & SPRINGS WELL CLEARANCES WETLAND SEPTIC SYSTEMS WINTERIZE A BUILDING More Information |
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 alternative septic system designs, including raised septic systems, septic mound systems, intermittent sand filter septic systems, and evaportion-transpiration septic systems. Also see SEPTIC CODES & REFERENCES and SEPTIC CONSULTANTS. Citation of this article by reference to this website and brief quotation for the sole purpose of review are permitted. Use of this information at other websites, in books or pamphlets for sale is reserved to the author. Technical review by industry experts has been performed and is ongoing - reviewers welcomed and are listed at "References." © 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. Section 75-A.9 Alternative Septic Systems - (d) Intermittent Sand Filter Septic Systems Design Criteria
Title: Appendix 75-A.9 - Alternative Septic Systems
[Regulation and System Design Criteria for Raised Septic Systems,
Septic Mound Systems, Intermittent Sand Filter Bed Systems,
Evaporation-Transpiration Septic Systems,
Evaporation-Transpiration Absorption Septic Systems, and
Other Alternative Septic Systems]
(1) Sand Bed Septic Systems - GeneralIn a sand filter septic system, the septic tank or aerobic unit effluent is intermittently spread across the surface of a bed of sand through a network of distribution lines. Collector pipes beneath the filter collect treated effluent after it has passed through the sand. (2) Site Requirements for Sand Filter Bed Septic Systems(i) All horizontal separation distances shown in Table 2 must be met and the minimum required vertical separation to groundwater must be met from the bottom of the collector pipes. (ii) An environmental assessment determines that the development of the site with a sand filter is consistent with the overall development of the area and will cause no adverse environmental impacts. (3) Design Criteria for Sand Filter Bed Septic Systems(i) Septic tanks installed before a sand filter shall have dual compartments or two tanks in series. The use of a gas baffle on the outlet is strongly recommended. (ii) The direct discharge of sand filter effluent to the ground surface or to a body of water shall not be approved by the Department of Health or a local health department acting as its agent. (iii) Distributor lines shall be placed at three foot center lines as level as possible. (iv) Collector pipes shall be centered between distribution lines at a slope of 1/16 to 1/8 inch per foot. (v) Effluent shall be distributed to the sand filter by means of pressure distribution or siphon dosing. Pressure distribution lines shall be a minimum of 1.5 inches and a maximum of three inches in diameter. If siphon dosing is allowed, the distributor pipe(s) shall have a diameter of three to four inches. (vi) The distribution system shall be designed to dose the filter at least three times daily based upon the design flow rates with each dose. (vii) The sand media shall have an effective grain size of 0.25 to 1.0 mm. If nitrification is not required by the local health department, the effective grain size shall be in the range of 0.5 to 1.00 mm. All sand shall pass a 1/4 inch sieve. (viii) The uniformity coefficient of the sand shall not exceed 4.0. (ix) The maximum allowed daily sand loading rate shall be 1.15 gal/day/sq. ft. (x) Effluent from the collector pipes shall be discharged to an absorption bed located below the original ground level or a mound that is built up above the original ground surface. The size of the bed/mound shall be based upon the estimated quantity of effluent reaching the collector pipe and an application rate of 1.2 gal/day/sq. ft. regardless of the underlying soil percolation. The fill material for the bed/mound shall consist of medium sand with a percolation rate, tested at the borrow pit, not faster than five minutes per inch. All minimum vertical and horizontal separation distances shall be maintained as described in Section 75-A.4. (4) Construction of Sand Bed Septic Systems(i) After excavation, the collector pipe shall be placed in 3/4 inches to 1 1/2 inches size aggregate. (ii) There shall be a minimum of four inches of this aggregate beneath the entire system above the collectors. (iii) A three inch layer of crushed stone or clean gravel with a size of 1/8 inches to 1/4 inches is carefully placed on top of the aggregate. (iv) A minimum of 24 inches of the approved sand is placed above the crushed stone or gravel. (v) The distributor pipes are placed in a layer of aggregate that provides a minimum of four inches across the entire surface of the filter and at least two inches above and below the distributor pipes. (vi) A permeable geotextile, two inches of hay or straw, or untreated building paper is placed over the entire bed area to prevent the infiltration of fines into the filter. (vii) The entire surface of the filter shall be covered with six to 12 inches of topsoil, mounded to enhance the runoff of rainwater from the system and seeded to grass. (viii) The bed/mound following the filter shall be covered with 12 inches of topsoil and seeded to grass. More Reading About Intermittent Sand Filter Bed Septic SystemsSand Septic Filters in DESIGN ALTERNATIVES for Septic Systems, a discussion of various septic effluent filter media. Using a Sand Bed Effluent Disposal System as a Component of Alternative Septic Systems for Difficult Sites. This document includes the NYS Appendix 75-A section on sand filter beds as well as sand filter bed design comments and advice from other experts Questions & Answers regarding this article. Ask a Question or Search InspectAPediaHTML Comment Box is loading comments...
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