Septic in Pomona, MO

Pomona, MO blends small‑town charm with a bit of country living, and that means a lot of homes here rely on septic systems rather than centralized sewer lines. Is septic common in Pomona? Yes—very common. If you own or buy a home in town or nearby rural areas, you should plan for a septic system. Even when a property is near public mains, many older and mid‑sized lots rely on on‑site wastewater treatment. When you're house hunting, you'll likely encounter a system, its age, and a maintenance history instead of a municipal sewer bill.

Why homes typically use septic systems in Pomona

• Rural layout and lot sizes: Many lots aren't laid out for easy sewer hookups, and extending sewer lines can be impractical or prohibitively expensive.
• Cost and practicality: Septic systems provide a neighborhood‑level solution that's affordable for individual property owners without waiting for public infrastructure to reach every street.
• Soil and groundwater considerations: In our area, soil conditions and drainage often favor on‑site treatment, making a properly designed drain field a reliable option when installed and maintained correctly.
• Local regulations and permitting: Septic systems are standard in many Missouri communities where public sewer isn't immediately available, so knowing the system basics helps with inspections, permits, and future maintenance.

High‑level explanation: why septic exists here

A septic system is designed to treat wastewater where it's produced—on the property. A buried tank separates solids from liquids, and the liquid effluent travels to a drain field where soil and microorganisms finish the treatment. The whole setup is sized for your home's typical water use and number of bedrooms. Proper maintenance keeps solids from building up, protects the drain field, and helps prevent backups or odors. In Pomona, as in many Missouri communities, the on‑site approach remains common because it's practical, scalable, and well suited to a range of lot configurations.

What to expect and how to care for your system

• Expect regular inspections and pumping: most homes benefit from a professional check every 3–5 years, with pumping as needed based on tank size and use.
• Mind the inputs: avoid pouring fats, oils, and non‑flushable items down the drain; use septic‑safe cleaners and limit heavy garbage disposal loads.
• Watch for early warning signs: slow drains, gurgling sounds, wet spots over the drain field, or strong odors. If you notice them, call a qualified septic contractor to inspect.

If you're new to Pomona or just getting familiar with a home's septic setup, you've got a trusted neighbor in the know who can help translate the local basics into practical, affordable maintenance.

Where Septic Systems Are Common in Pomona

Rural residential areas outside sewer service

• In Pomona, many homes on the outskirts and beyond the town core rely on septic because centralized sewer lines don't reach every street or subdivision.
• Lot sizes in these areas are often larger (1 acre or more), which aligns with typical septic setbacks and field design requirements.
• Local soils in the Ozarks can be variable—some spots drain well, others have shallow bedrock or clay horizons that complicate drainage. This mix makes septic the practical choice where public sewer isn't available.
• Seasonal factors matter: higher water tables or wet seasons can push systems to the edge of their design, so site evaluation and proper field sizing are especially important.

Older homes on larger lots

• Homes built before municipal sewer expansion are commonly served by on-site systems. If a house sits far from the nearest sewer line, septic is often the most feasible option.
• Larger lots provide space for wastewater treatment and drainage fields, which reduces the likelihood of groundwater intrusion and helps meet setback requirements.
• In some cases, aging septic components require replacement or upgrades when a property is sold or remodeled, so know where your tank and drain field are located.

Soil, topography, and bedrock factors that shape septic use

• Ozarks soils can be rocky, shallow, or locally heavy in clay. Each condition changes how a drain field can be laid out and may necessitate alternative designs.
• Sloped lots need careful planning to avoid surface runoff and soil erosion into the drain field; elevated or terraced layouts can help preserve performance.
• Limestone bedrock, karst features, and limited deep soils commonly seen in Pomona influence percolation rates and may steer households toward mound systems or advanced treatment options.
• Because soil and terrain directly affect system longevity, many Pomona properties rely on professional site evaluations to determine the best septic approach.

Common septic system types you'll see around Pomona

• Conventional gravity septic systems for good-draining soils with adequate depth to the drain field.
• Mound systems where soil is shallow, unsuitable, or where the water table is high.
• Drip irrigation or low-pressure dose systems on sloped sites to maximize effluent distribution without overloading the drain field.
• Holding tanks or alternative wastewater approaches used only when on-site disposal isn't feasible—these are less common but may occur in challenging parcels.
• Pumps and effluent filters are frequently included to improve reliability and aid in maintenance.

Quick checks for Pomona homeowners (step-by-step)

1. Verify sewer availability: contact Pomona's city offices or the local health department to confirm whether sewer service is planned for your street.
2. Get a site assessment: hire a licensed septic designer or soils professional to evaluate soil types, depth to bedrock, and groundwater conditions.
3. Choose an appropriate system: select a design that matches soil and slope, with a plan for future capacity if you add bedrooms or living space.
4. Plan regular maintenance: schedule pump-outs every 3–5 years (or per local guidance) and inspect the system after heavy rainfall or long dry spells.
5. Follow local permitting: obtain any required installation or alteration permits and use licensed installers for workmanship and code compliance.

Official resources

• Missouri Department of Natural Resources (DNR) – Onsite Wastewater Guidance: https://dnr.mo.gov/
• U.S. Environmental Protection Agency (EPA) – Septic Systems: https://www.epa.gov/septic

Septic vs Sewer: What Homeowners in Pomona Should Know

How septic systems work vs a sewer connection

In homes with a private septic system, wastewater from toilets, sinks, and laundry goes into an underground septic tank. Solids settle to the bottom, fats and oils float to the top, and clarified liquid flows into a drain field where soil bacteria finish the treatment. A typical home needs regular pumping every 3 to 5 years, depending on tank size and use.

In contrast, a home connected to a municipal sewer sends all wastewater to a centralized treatment plant through underground pipes. You usually pay a monthly sewer bill to the city or utility, and the municipality handles maintenance of the sewer lines and the treatment process.

• Septic system: independence from city fees, but ongoing maintenance is your responsibility.
• Sewer: no tank pumping or field, but you rely on utilities and rate changes set by the local provider.

Costs and bills in Pomona

Costs vary greatly between septic and sewer setups, and by utility arrangements in Pomona. Keep these in mind:

• Septic system costs: pumping every 3–5 years (roughly a few hundred dollars), plus occasional inspections or repairs. Long-term replacement of a failed system can be substantial.
• Sewer costs: monthly service charges plus occasional connection or repair fees. Rates are set by the local utility and can change with maintenance plans or system upgrades.
• Budget tip: treat septic maintenance as a recurring item in your annual household budget; for sewer, review your utility bill for upcoming rate changes and special assessments.

Maintenance essentials and best practices

Care and prevention go a long way toward avoiding costly failures.

• Regular pumping and inspections: plan pumping every 3–5 years; more often for high-occupancy homes or challenging soils.
• Water use discipline: spread out laundry, fix leaks, and use high-efficiency fixtures to reduce load on your system.
• Mind what goes down the drain: only toilet paper in toilets; dispose of fats, oils, chemicals, solvents, dental floss, wipes, and medications properly (not in the septic system or sewer).
• Drain field protection: avoid heavy equipment or parking on the drain field; keep trees and deep-rooted plants away.
• Seasonal care: shovel snow away from the system area; ensure access to the tank for future maintenance.

Signs of trouble and what to do

Watch for these early warning signs and take action promptly.

• Slow drains, gurgling sounds, or sewage odors inside the home.
• Wet, soggy spots or standing water over the drain field; lush patches in the yard near the system.
• Backup in sinks or toilets during heavy rainfall.

If you notice issues, contact a licensed septic professional or your sewer utility for guidance. Avoid DIY fixes that could damage the system or violate local codes.

Official resources

• EPA: septic system overview and maintenance tips -

Typical Septic System Types in Pomona

Conventional septic systems (gravity or pressure-dosed)

Most Pomona homes rely on a conventional septic system when soils and groundwater conditions are favorable. A single septic tank collects wastewater, and treated effluent is released to a drainfield using gravity or a small dose pump.

• How it works
  • Wastewater flows by gravity from the house into the tank, where solids settle. Liquid effluent then migrates to a drainfield of perforated pipes or a bed in well-draining soil.
• When it's a good fit
  • Adequate depth to bedrock or high-water table is not an issue, and soils percolate well enough to move wastewater through the field.
• Pros
  • Simple design, reliable, and typically lower upfront cost.
  • Easy to find local installers and maintenance providers.
• Cons
  • Requires a reasonably large, on-site drainfield.
  • Performance drops in poorly drained soils or high groundwater areas.

Mound systems

A mound system is used when native soils are too shallow, too rocky, or too slow to absorb water. The drainfield is built up above the natural ground on a sand-filled mound.

• How it works
  • A septic tank pre-treats wastewater, then effluent is pumped or dosed to a buried sand fill in a raised mound, where it slowly infiltrates.
• When it's a good fit
  • Shallow soil, high water table, or restrictive soils prevent a conventional drainfield.
• Pros
  • Expands options for difficult sites and can handle seasonal wet conditions.
• Cons
  • Higher installation and upkeep costs, more moving parts to maintain.

Sand filter systems

Sand filter systems provide a secondary treatment step, especially in soils with moderate to poor permeability.

• How it works
  • After the septic tank, effluent is directed to a lined filter bed filled with sand. Treated water then leaches to the soil below or through a distribution system.
• When it's a good fit
  • Soils don't drain efficiently, but a properly sized sand filter can improve treatment performance.
• Pros
  • Increased treatment efficiency and can tolerate tighter site conditions.
• Cons
  • Requires periodic maintenance of the filter bed and compatible dosing.

Aerobic Treatment Units (ATU)

ATUs are compact treatment units that use added oxygen to pretreat wastewater before it reaches the soil.

• How it works
  • An ATU blends aeration, clarification, and disinfection to produce higher-quality effluent. The final disposal method (drainfield or spray) then treats the water further in the soil.
• When it's a good fit
  • Limited soil suitability, smaller lots, or sites needing higher effluent quality.
• Pros
  • Higher level of treatment in a smaller footprint; can allow for smaller drainfields.
• Cons
  • Higher energy use, ongoing service needs, potential odor or noise if not properly maintained.

Chamber systems

Chamber systems use lightweight plastic chambers instead of traditional gravel-filled trenches for the drainfield.

• How it works
  • Pre-treated effluent is distributed through interconnected chambers that provide storage and infiltration space.
• When it's a good fit
  • Areas where trench width is limited but drainage capacity is desired.
• Pros
  • Easier transport and installation, often lower weight on-site.
• Cons
  • Costs can be higher than conventional, and proper installation is essential for performance.

Other options and notes

• Drip irrigation or spray disposal: treated effluent may be routed to landscape irrigation where allowed by code, requiring careful design and local permits.
• Holding tanks or cesspools: rare for new homes in Pomona; typically used only in very specific situations or upgrades.
• Site evaluation and planning steps (short guide)
  1. Get a soil and site evaluation from a licensed designer or local health official.
  2. Test soil percolation and depth to groundwater to determine feasible drainfield options.
  3. Review lot size, setbacks (wells, property lines), and future maintenance needs.
  4. Choose a system type with your installer based on soil, space, and local regulations.

Resources for official guidance:

• Missouri Department of Natural Resources (DNR) – On-site Wastewater Systems: https://dnr.mo.gov
• U.S. Environmental Protection Agency (EPA) – Septic Systems: https://www.epa.gov/septic

Common Septic Issues in Pomona

Drainfield Saturation and Poor Soils

• In Pomona, soils are often shallow and clay-rich with limestone bedrock, which reduces percolation and leads to drainfield saturation, especially after heavy rains.
• Symptoms: soggy patches in the yard, overly lush vegetation over the drainfield, gurgling sounds in plumbing, toilets that take longer to flush.
• Why Pomona-specific: Ozark geology and seasonal rainfall push the system to work harder; older installations on marginal soils are common.
• What to do:
  1. Reduce water use and spread out laundry and dishwashing.
  2. Have a licensed septic professional perform a soil evaluation and drainfield assessment; consider alternatives like a mound system if soils are poor.
  3. Schedule septic tank pumping every 3–5 years (or per pro advice) to cut solids reaching the drainfield.
  4. Use wastewater-friendly practices: avoid harsh chemicals, limit garbage disposal loads, maintain grease traps if present.
• Official resources: Missouri DNR Onsite Wastewater Program: EPA Septic Systems: EPA Septic Systems:

Wet Weather and High Water Tables

• Pomona experiences seasonal rains that can raise the water table and saturate the drainfield during wet periods.
• What happens: saturated soils reduce absorption capacity, leading to surface wet spots, backups, and standing water on the drainfield.
• Practical steps:
  1. Space out heavy water use around rain events; postpone long laundry runs during forecasted downpours.
  2. Divert roof runoff and surface water away from the drainfield.
  3. Have the system inspected after heavy rains or floods and pump if solids are high.
  4. If issues persist, discuss alternatives with a licensed pro (e.g., elevated or mound drainfields).
• Official resources: EPA Septic Systems: https://www.epa.gov/septic

Maintenance Habits that Prevent Issues

• Regular pumping, inspection, and mindful disposal prevent most problems in Pomona.
• Steps:
  1. Schedule professional inspections every 1–3 years, depending on system type and use.
  2. Pump every 3–5 years or per professional recommendation.
  3. Flush only toilet paper; avoid wipes, fats, oils, chemicals, paints, or solvents.
  4. Protect the drainfield: keep vehicles and heavy equipment off the area; limit landscaping directly over the system.
• Official resources: Missouri DNR Onsite Wastewater; EPA Septic Systems: https://www.epa.gov/septic

Septic Inspection, Permits & Local Oversight

In Missouri, septic systems are regulated by the state DHSS (On-Site Wastewater Program) and administered locally by your county health department. For Pomona residents, that typically means working with the Oregon County Health Department to obtain permits, schedule inspections, and ensure your system meets state and local requirements. Local codes and any city-specific rules may add steps, so always check with the county office.

Permits you may need

• New system installation: An On-Site Wastewater Permit is usually required before breaking ground.
• System upgrades or repairs: Major changes to components (tank, piping, drains field) often need a permit review.
• Transfer of property or changes in use: A final inspection or new permit may be required when a home is sold or the land use changes.
• Special features: If you're installing an advanced treatment unit, dotted line drainfield, or reusing wastewater, additional approvals may apply.

Inspection expectations

• Pre-permit site evaluation: The local health department may request site data, soil information, and lot layout to determine suitability.
• Plan review: A licensed designer or installer submits a system design for evaluation against state and local requirements.
• In-progress inspections: Inspections typically occur at key milestones (e.g., trenching, tank placement, backfill) to verify that work matches the approved plan.
• Final inspection: A final inspection confirms the system is installed correctly and ready to operate; approval is usually needed to obtain the operation permit.
• Documentation: Keep copies of permits, design plans, soil reports, and inspection reports; you may need them for future property transactions or maintenance.

Steps to obtain a permit in Pomona, MO

1. Contact your county health department to confirm whether your property needs a permit for septic work and to request the permit packet.
2. Engage a licensed On-Site Wastewater Installer or designer to perform soil evaluation and prepare a compliant system design.
3. Gather required information (site sketch, lot dimensions, well location relative to the septic system, drainage patterns) and submit the permit application with any applicable fees.
4. If soil tests or perc tests are required, ensure they are performed by an approved professional and the results are included with your submission.
5. Receive permit approval in writing and note any conditions or additional inspections that are required.
6. Schedule and pass inspections at the specified milestones (pre-installation site setup, tank and trench work, backfill, and final commissioning).

Local oversight and compliance

• Oversight: The Oregon County Health Department enforces state On-Site Wastewater regulations and coordinates inspections with licensed professionals.
• Accountability: Inspectors verify that installation matches the approved plan and meets setback, soil, and design standards; non-compliance can trigger corrections, fines, or stop-work orders.
• Town-specific nuances: Some Pomona-area properties may have additional local requirements or conservation guidelines; always verify with the county office.

What homeowners can do to prepare for inspections

• Keep access clear: Ensure the work area, water and electrical services, and access routes are free of obstructions.
• Maintain records: Have permits, plans, soil reports, and inspection notices readily available for inspectors.
• Confirm credentials: Use a licensed installer/designer; request proof of license and any required certifications.
• Schedule thoughtfully: Plan inspections so there's time to address any deficiencies before deadlines.
• Communicate clearly: If you've made changes to the plan, notify the inspector and obtain written approval before proceeding.

Common pitfalls to avoid

• Skipping soil evaluation or design review, which can lead to permit denial.
• Working without a required permit, risking fines or forced removal.
• Missing an inspection milestone and delaying project completion.
• Failing to comply with setbacks from wells, streams, or property lines.

Resources

• Missouri Department of Health and Senior Services – On-Site Wastewater Program: health.mo.gov/safety/onsitewastewater
• Find local county health department contacts and guidance through state resources and the DHSS directory (to locate your exact Oregon County contact).

Septic Maintenance for Homes in Pomona

Pomona-specific climate and soil considerations

• Pomona's Ozarks-area soils can be clay-heavy with slower water drainage. This makes the drain field more sensitive to overloading.
• Spring thaws and rainy seasons often raise the water table, which can slow effluent absorption and raise the risk of surface seepage if the system is near capacity.
• Proximity to Pomona Lake and groundwater movement through karst features can influence how quickly wastewater moves underground. Proper siting and regular maintenance are especially important in these areas.
• Tree roots and dense landscaping near the septic system can interfere with pipes and the drain field, so plan plantings carefully and keep heavy equipment off the drain-field area.

Regular inspection routine

1. Inspect the visible components at least twice a year for signs of trouble: odors, wet spots, lush vegetation above the drain field, or unusually slow drains.
2. Check the septic tank manhole/lids for signs of settling or leaks; ensure access remains secure and protected from children or livestock.
3. Inspect the effluent filter (if your system has one) and clean or replace per manufacturer guidance.
4. Have a licensed professional perform a full system diagnostic if you notice backups, gurgling sounds, or repeated slow drainage.

Pumping, tank care, and filter maintenance

• Most typical residential systems in the region use a 1,000–1,500 gallon tank. Pumping every 3–5 years is common for normal usage; larger households or high wastewater volumes may require more frequent pumping.
• Plan to have the tank pumped by a licensed septic contractor who can also inspect baffles and pipes for cracks or failure.
• If your system has an effluent filter, clean it at the intervals recommended by the installer or local health guidelines to prevent backups.
• Keep a maintenance log: date of pumping, tank size, and any repairs. This helps track the system's performance through Pomona's seasonal weather.

Water use and household practices

• Spread laundry and dishwashing across the week; avoid dumping large quantities of wastewater in a short period.
• Use high-efficiency appliances and water-saving fixtures to reduce load on the septic system.
• Limit garbage disposals, fats, oils, and grease entering the tank; these can clog or slow the system.
• Do not flush non-biodegradable items, chemicals, solvents, paint, or medications. Even "flushable" wipes can clog an effluent system.
• Consider composting organic waste when possible to reduce solids entering the tank.

Protecting the drain field in Pomona's conditions

• Keep the drain-field area free of compacted soil, vehicles, or heavy equipment.
• Do not plant trees or shrubs with aggressive roots directly over the drain field.
• Proper grading around the tank and field helps ensure surface water does not pool and seep into the system.
• Avoid connecting sump pumps or footing drains to the septic system; excess water can overwhelm the field during spring rains.
• If your lot floods or you experience long periods of wet conditions, have a professional inspect the field after the water recedes.

Landscaping and system layout

• Plant shallow-rooted grasses or groundcovers over the drain field to stabilize soil without disrupting the system.
• Maintain at least 10–20 feet of clear area around the tank and field, depending on local codes and tank size.
• Create a marked fence or barrier to discourage parking or vehicle traffic on the drain-field zone.

When to call a pro and what to expect

• Call a licensed septic contractor if you notice persistent backups, strong sewer odors, standing water near the system, or unusual green patches above the drain field.
• A pro will assess tank integrity, baffles, filters, soil absorption capacity, and may perform camera inspections of sewer lines.
• In Pomona, you may also need to check with local or county health departments about permits, inspections, and any required disclosures for repairs or replacements. Official guidance can be found at state and federal resources:
  • Missouri Department of Natural Resources – Onsite Wastewater Treatment Systems:
  • U.S. EPA – Septic Systems: https://www.epa.gov/septic

Local resources and official guidance

• For state-level rules, siting, and maintenance guidelines specific to Missouri, consult the DNR OWTS page above.
• For homeowner-friendly, research-backed tips on septic systems, look to extension and environmental health resources, and always confirm with a licensed local contractor.

Cost Expectations for Septic Services in Pomona

Septic Tank Pumping and Cleaning

• What it includes: removing sludge and scum from the tank, inspecting baffles, checking the effluent screen if present, and resealing lids. Access and tank size influence crews and time.
• Pomona-specific considerations: many homes here rely on 1,000–1,500 gallon tanks with driveways or tight access. Clay soils and tree roots near lots can affect lid access and pumping efficiency.
• Typical cost in Pomona: $250–$450 per service, with larger or hard-to-reach tanks edging toward the higher end. Additional fees may apply for heavy sediment, multiple tanks, or after-hours needs.

Septic System Inspections (Annual or Pre-Purchase)

• What it includes: visual system check, baffle condition, effluent quality, pump status (if applicable), and general performance assessment. More comprehensive inspections may include dye tests or percolation checks.
• Pomona-specific considerations: older homes and soils common to the Ozarks can hide subtle failures; a thorough inspection helps prevent unexpected field failures after heavy rains.
• Typical cost in Pomona: $100–$300 for a basic assessment; $200–$350 for a more thorough, lender-ready inspection.

Camera/Video Inspection of Sewer Lines

• What it includes: using a small camera to inspect sewer lines from the house to the tank or from the tank to the drain field, identifying cracks, root intrusion, or offset pipes.
• Pomona-specific considerations: root intrusion from established trees and seasonal groundwater movement can obscure problems; video helps target repairs rather than guesswork.
• Typical cost in Pomona: $150–$350, depending on line length and accessibility.

Drain Field Evaluation and Maintenance

• What it includes: soil and moisture observation, inspection of distribution lines, and assessment of field performance. May include flushing or minor cleaning if appropriate.
• Pomona-specific considerations: heavy rainfall and fluctuating water tables in this region can affect drainage; timely evaluation can prevent costly untreated failures.
• Typical cost in Pomona: $300–$800, depending on acreage, field layout, and whether testing is included.

Drain Field Repair or Replacement

• What it includes: repair of lateral lines, distribution box, or trenches; or replacement of all or part of the drain field, possibly with an upgraded design (e.g., enhanced leachate absorption or pressure dosed system).
• Pomona-specific considerations: clay soils and local groundwater tables can drive the need for redesigns (e.g., mound or Advanced Treatment Units) rather than a simple fix.
• Typical cost in Pomona:
  • Minor repairs: $1,000–$3,500
  • Major repairs / partial replacement: $4,000–$12,000
  • Full drain field replacement: $10,000–$25,000+ (mound or high-tech systems can exceed this)

Septic System Installation or Replacement (New Systems)

• What it includes: site evaluation, design, permits, trenching, tank installation, drain field, and final connection. In Pomona, leach field limits often lead to mound or advanced treatment system options.
• Pomona-specific considerations: the Ozarks' soils and water table frequently necessitate alternative system designs; local permitting and soil testing steps should be anticipated.
• Typical cost in Pomona: $12,000–$40,000 for conventional setups; $25,000–$60,000+ for mound or advanced treatment installations.

Permitting, Soil Evaluation, and Site Assessment

• What it includes: soil tests (perc tests), site evaluation, plan design, and submitting permit applications to the local health authority.
• Pomona-specific considerations: Oregon County or adjacent health districts often require formal site evaluations for new systems or major upgrades.
• Typical cost in Pomona: $300–$900 depending on scope and required analyses.

System Decommissioning/Abandonment

• What it includes: sealing or removing the old tank, filling in, securing lids, and proper site marking for future property changes.
• Pomona-specific considerations: required if plans change or a property is being sold; proper decommissioning prevents future safety issues.
• Typical cost in Pomona: $500–$1,500.

Emergency or After-Hours Service

• What it includes: rapid response for septic failures or backups, diagnostic, and repair work.
• Pomona-specific considerations: proximity to service providers can affect response times; after-hours work is more common in rural mowing seasons and when tank overflows occur during storms.
• Typical cost in Pomona: service call $150–$300; pumping and repairs billed on top of the call.

How to Prepare for Service (Steps)

1. Locate access points and clear a safe, walkable path to lids.
2. Gather recent maintenance records (pumping dates, repairs, tank size).
3. Note any symptoms: backups, slow drains, odors, or soggy leach fields.
4. Confirm tank size and system type with the contractor before scheduling.
5. Request a written estimate covering all anticipated scopes (pumping, inspection, repairs, or replacement).

Resources

• Missouri Department of Natural Resources – Onsite wastewater management:
• U.S. Environmental Protection Agency – Septic systems (general guidance): https://www.epa.gov/septic

(Note: Prices are typical ranges for Pomona, MO, and can vary by contractor, tank size, access, and specific system type.)