Septic Engineer in Liverpool, NY
The Village of Liverpool and the Town of Salina are on county sewer. Liverpool mailing addresses reach into areas that are not. Testing, PE stamped design and the county submittal.
Fees. Process. Answers.
Septic design for Liverpool, NY, from soil test to county approval.
The Village of Liverpool and the Town of Salina are both in the county Consolidated Sanitary District. Liverpool mailing addresses extend into Salina and Clay, and WEP says being in the district does not by itself mean a property can connect.
New York State guidance says home alterations that increase the number of bedrooms need the existing septic system evaluated by a licensed design professional. If it cannot handle the added flow, the professional prepares the upgrade plan.
Collamer and Niagara silts from old lake sediment, and Lockport and Lairdsville soils over shale. The USDA rates about 93 percent of rated land around the village very limited for conventional fields.
The Onondaga County Health Department, Bureau of Public Health Engineering, 421 Montgomery Street, Syracuse. The village, Salina or Clay issues the building permit.
Designs are prepared and stamped by a New York licensed Professional Engineer (PE).
Use the form. Estimate in 1 hour.
Septic engineer in Liverpool, NY: what it is and who needs one
The Village of Liverpool sits on the northeast shore of Onondaga Lake and is fully inside the county sewer district, as is the Town of Salina around it. Septic engineering comes up for Liverpool area properties that are not on a sewer line, for buyers checking a lot before closing, and for owners adding bedrooms on an older system. The engineer tests the soil, designs to Appendix 75-A, and gets the plan through the Onondaga County Health Department.
Backwell coordinates testing, design, the submittal and the install. Designs are prepared and stamped by a New York licensed Professional Engineer (PE).
Liverpool and Salina sewer
WEP lists both the Village of Liverpool and the Town of Salina in the county Consolidated Sanitary District. The village asks residents to call the county's 24 hour sewer line, (315) 435-3157, first for sewer problems, and the county's Wetzel Road plant on Wetzel Road serves parts of Salina and Clay. Many homes with a Liverpool mailing address sit outside the 0.8 square mile village, in Salina or Clay.
WEP's own caution applies here too: being inside the district does not alone decide whether a property is served or can be. If a Liverpool address is on a private system, the design question is the same as anywhere in the county.
Soils in Liverpool and the system they point to
The ground around Liverpool is a mix of lake plain silt and thin till over shale. Collamer and Niagara silts formed in old lake sediment, while Lockport and Lairdsville soils sit on reddish shale at moderate depth. Close to the lake, a lot of the land is filled or built over.
| Soil series | Share of land | What it is (USDA) | What it usually means for the design |
|---|---|---|---|
| Collamer | 10% | very deep, moderately well drained silty lake sediments | Slow perc and spring wetness. Long trenches, shallow trenches or a raised bed. |
| Lockport | 9% | moderately deep, somewhat poorly drained thin till over reddish shale, very slow permeability | Slow soil over rock. Raised bed designs are common. |
| Lairdsville | 7% | moderately deep till over bedrock with low conductivity in the subsoil | Rock inside 4 feet and slow subsoil. Shallow or raised design. |
| Niagara | 7% | very deep, somewhat poorly drained silty lake sediments | High seasonal water and slow perc. Raised beds and mounds are common here. |
| Ontario | 7% | deep or very deep, well drained loamy till on drumlins and till plains | Usually workable for conventional or shallow trenches. Drumlin slopes can push past the 15 percent limit. |
| Hilton | 4% | very deep, moderately well drained till | Seasonal wetness in the lower subsoil. Shallow trench layouts come up often. |
USDA septic absorption field ratings, a box reaching about 2 miles out from the Village of Liverpool line, including Onondaga Lake: very limited 93 percent, somewhat limited 7 percent of rated land. Leading limits: shallow seasonal water, slow water movement, fast seepage in the bottom layer.
On the rated land around the village, about 93 percent comes up very limited for a conventional field. Shallow seasonal water leads, then slow water movement and seepage in the bottom layer. Lockport soils deserve a note: the USDA describes them as moderately deep to shale with very slow permeability, which is about as hard as septic soil gets. On those lots the design usually lifts the field into fill. On Collamer silt with decent depth, long shallow trenches can work.
Onondaga Lake, Salina permits and stamped plans
Fields stay 100 feet from Onondaga Lake, streams and wetlands under Appendix 75-A, and the county guidelines want every component above the 100 year flood level. On the permit side, the Town of Salina takes building permits online at Town Hall, 201 School Road, and says projects over $20,000 need plans stamped by a New York licensed engineer or registered architect. Inside the village, permits go to Building Safety and Code Enforcement at 310 Sycamore Street.
How a septic design in Liverpool works
- Send the address. Use the form. Estimate in 1 hour.
- Confirm sewer or septic. If a public sewer can serve the lot, you do not need a septic design.
- Perc holes and a deep test pit. At least two staked perc holes in the design area (30 inches deep for a conventional system) and a test pit logged to 6 feet for mottling, water and rock.
- Stamped design. A scaled plan with the tax map number, nearby wells, elevations and system details. Designs are prepared and stamped by a New York licensed Professional Engineer (PE).
- County submittal. Plan and fee go to the Bureau of Public Health Engineering, 421 Montgomery Street, Syracuse: 3 plan copies outside the lake watersheds. Once approved, a copy goes to the town.
- Building permit. Village of Liverpool Building Safety and Code Enforcement (310 Sycamore Street), Town of Salina Planning and Development (201 School Road), or Town of Clay Codes (4401 Route 31), depending on the lot.
- Install and inspection. County inspection on 24 hours notice. Inside plumbing is done by a plumber licensed through Onondaga County Plumbing Control, and fill systems get the engineer's fill certification first.
What it costs
The county fee schedule sets the health department side for a lot under 1,000 gallons per day: $310 full application, $186 redesigned project, $62 amended project or revised plan review, $93 site investigation, $62 repair inspection. The fee is paid with the plans and covers the county's review and construction inspection. Testing, design and install are priced in writing.
What the health department checks
The county reviews the plan against New York's Appendix 75-A and its own design guidelines. For Liverpool area lots the checks that usually matter are the 10 foot property line and 20 foot house distances on smaller suburban lots, and the 100 foot well distance where a neighbor still has a well.
- Flow and tank. 110 gallons per day per bedroom for new construction. Tank size follows the bedroom count.
- Usable soil. Conventional: 4 feet over rock, clay or high water, with water 2 feet below the trench bottom. Shallow trench: 2 to 4 feet. Raised bed: 1 to 2 feet, water 1 foot down. Mound: water 1 foot down, rock 2 feet down, native perc faster than 120 minutes per inch, slope under 12 percent.
- Separations. Field, raised bed or mound: 100 feet to wells (200 if upgrade in the drainage path), 100 feet to water and wetlands, 20 to the house, 10 to the lot line, measured from the toe of any fill. Tank: 50 feet to wells and water.
- Site limits. No field over 15 percent slope or below the 10 year flood level, system above the 100 year flood level, no soil faster than 1 minute per inch unless modified, and 50 percent expansion area where possible.
Common Liverpool problems and how the design handles them
Adding a bedroom on a lot with septic
The problem: New York's licensed design professional guidance says a home alteration that adds bedrooms needs the existing system evaluated by a design professional.
How the design handles it: The PE checks the tank size and field against the new bedroom count. New construction is sized at 110 gallons per day per bedroom. If the old system falls short, the plan shows the fix.
Small suburban lot, no room for a field
The problem: A field needs 10 feet from property lines, 20 feet from the house and 100 feet from wells and water, plus 50 percent extra area for a future replacement where possible.
How the design handles it: The PE lays out every setback on a scaled plan. Pressure dosed shallow trenches or enhanced treatment can shrink the footprint on a tight lot.
Shale close to the surface
The problem: Lockport and Lairdsville soils put shale within 20 to 40 inches and move water very slowly.
How the design handles it: With 1 to 2 feet of usable soil, a raised bed on certified fill is the common answer.
Timeline
For a bedroom addition, the evaluation comes before the building permit, so it belongs at the start of the project. For a new or replacement field, spring testing gives the clearest read on water. Raised beds need the county's fill certification before the field goes in.
Sources
Soil shares and ratings come from the USDA NRCS soil survey (SSURGO) for Onondaga County, summarized for a box reaching about 2 miles out from the Village of Liverpool line, including Onondaga Lake. Regulations and fees as published by the agencies below; they can change.
- Onondaga County Health Department, Septic Systems (Bureau of Public Health Engineering)
- Onondaga County Environmental Health fee schedule
- Onondaga County Design Guidelines for Individual Sewage Systems
- Onondaga County Health Department Fill Certification Form
- NYS DOH 10 NYCRR Appendix 75-A, Wastewater Treatment Standards, Residential Onsite Systems
- NYS DOH fact sheet: Need for Licensed Design Professionals, Residential OWTS
- Onondaga County WEP, Consolidated Sanitary District service area
- Onondaga County WEP Plumbing Control
- Onondaga County WEP, Wetzel Road WWTP
- USDA NRCS Web Soil Survey, Onondaga County (NY067)
- USDA NRCS Soil Data Access (SSURGO), septic tank absorption field ratings
- Village of Liverpool
- Village of Liverpool Building Safety and Code Enforcement
- Town of Salina building permits
- USDA Official Series Description: Collamer
- USDA Official Series Description: Lockport
- USDA Official Series Description: Lairdsville
- USDA Official Series Description: Niagara
- USDA Official Series Description: Ontario
- USDA Official Series Description: Hilton
More septic design in Onondaga County.
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