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Aerial drone view of a high-capacity engineered chamber drain field and commercial septic tank installation in Colorado
Colorado Commercial Wastewater Specialists

Engineered Commercial Septic Systems & Heavy Installation

Turnkey commercial OWTS design, high-strength wastewater pre-treatment, and CDPHE Regulation 43 permitting for businesses, RV parks, agricultural hubs, and developments across Colorado.

CDPHE Regulation 43 Compliant Verified License: C10002733 PE Partnered Designs Bonded & Insured 15 Years Experience

Who Needs Commercial Septic Systems In Colorado?

Properties unserved by municipal sewer lines generate complex wastewater loads. We engineer custom On-site Wastewater Treatment Systems (OWTS) tailored to high-capacity demands and strict health codes.

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RV Parks & Campgrounds

High surge volume and variable seasonal flows require specialized equalization tanks, large-volume soil treatment areas (STA), and heavy-duty dump station management.

• High surge capacity & dump stations
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Restaurants & Food Service

High-strength organic waste, fats, oils, and grease (FOG) quickly clog standard leach fields. We integrate engineered commercial grease interceptors and advanced aeration systems (ATU).

• High-strength waste & grease traps
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Agricultural & Industrial Hubs

Weld and Adams county processing plants, produce washing facilities, and equipment repair yards generate non-standard chemical or sediment loads requiring heavy pre-treatment design.

• Custom industrial pre-treatment solutions
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Multi-Family & Mobile Home Parks

Continuous daily flows exceeding thousands of gallons require multi-chamber concrete septic tanks, dosing siphon vaults, and alternating pressure-dosed drain fields.

• Multi-chamber & pressure-dosed STAs
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Event Venues & Wineries

Intermittent weekend surges mixed with acidic or high-BOD process wastewater require engineered holding infrastructure and controlled hydraulic loading rates.

• Flow equalization & surge management
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Strip Malls & Rural Retail

Multi-tenant retail centers need reliable, code-approved wastewater infrastructure to satisfy property transfers, county use permits, and lease expansions.

• Turnkey commercial OWTS expansion

Commercial Septic Engineering Services

End-to-end commercial wastewater management from initial soil testing and site design to heavy excavation and ongoing compliance maintenance.

Engineering & Design

Engineered Commercial OWTS Design & Permitting

Commercial systems demand rigorous soil morphology evaluations, percolation testing, and engineering specifications. We collaborate with licensed Professional Engineers (PE) to produce complete stamped design documents compliant with CDPHE Regulation 43 and local health departments across Weld, Larimer, Adams, Boulder, Jefferson, and Arapahoe counties.

  • ✓ PE-stamped engineered system plans & flow calculations
  • ✓ Local Public Health Agency & CDPHE Division approvals
  • ✓ Soil profile hole evaluations & vertical isolation depth analysis

Flow Thresholds in Colorado

Understanding state versus local permitting authority is critical for project timelines:

2,000 Gallons Per Day (GPD) or Less: Regulated under local County Health Department rules (following Regulation 43 baseline standards).
Greater Than 2,000 Gallons Per Day (GPD): Classified as Domestic Wastewater Treatment Works; requires CDPHE Water Quality Control Division site location approval and discharge permits.
Heavy Installation

Heavy Excavation & High-Capacity System Installation

Our heavy excavation equipment fleet handles large-scale concrete septic tank sets (1,500 to 10,000+ gallon capacities), dosing chambers, commercial lift stations, and expansive chambered or gravel-less Soil Treatment Areas (STA).

  • ✓ Heavy-duty precast concrete and polymer tank sets
  • ✓ Pressure distribution, sand mounds, and drip irrigation STAs
  • ✓ Commercial effluent pump chambers & alarm panel wiring

High-Strength Wastewater Management

Commercial kitchens and processing facilities produce Biochemical Oxygen Demand (BOD) and Total Suspended Solids (TSS) far exceeding residential waste.

We install secondary Aerobic Treatment Units (ATUs) and specialized grease interceptors to reduce effluent strength to Treatment Level 1 (TL1) before soil application, preventing premature leach field clogging.

Colorado OWTS Regulatory Mastery

CDPHE Regulation 43 Expertise

Navigating Colorado wastewater laws requires deep technical understanding. AB Septic ensures every commercial installation strictly adheres to 5 CCR 1002-43 guidelines, guaranteeing structural longevity and legal compliance.

Setback Requirements

Strict isolation distances from water wells (100 ft minimum), surface water, property lines, and commercial building foundations are verified prior to excavation.

Treatment Levels (TL1 - TL3)

Implementation of advanced treatment technology to handle varying effluent strengths and meet tight vertical separation distances to bedrock or water tables.

NAWT Inspections

Certified National Association of Wastewater Technicians (NAWT) inspections for commercial real estate transfers, sewer camera diagnostics, and structural tank reports.

Commercial Septic FAQ

Common questions regarding commercial septic systems in Colorado.

What qualifies a septic system as commercial in Colorado?

Commercial OWTS are defined by non-residential wastewater characteristics, daily flows over standard household metrics, or high-strength waste generation from food service, RV parks, agricultural processing, or multi-tenant facilities governed under CDPHE Regulation 43.

When does a commercial septic system require CDPHE state approval vs local county permits?

Systems equal to or under 2,000 Gallons Per Day (GPD) are permitted locally by county public health agencies. Systems exceeding 2,000 GPD require site location and engineering approval directly from the CDPHE Water Quality Control Division.

How do you handle high-strength wastewater for restaurants and commercial kitchens?

High-strength waste with elevated Fats, Oils, and Grease (FOG) or high BOD must be pre-treated. We install external commercial grease interceptors, supplemental aeration tanks, or Advanced Treatment Units (ATU) to lower waste strength to standard baseline levels before entering the leach field.

Do commercial systems require ongoing maintenance contracts?

Yes. Most Colorado counties require annual or bi-annual Operation & Maintenance (O&M) reporting submitted by certified technicians for advanced, commercial, or pressure-dosed OWTS installations to maintain active operating permits.

Get Started

Request A Commercial Project Quote

Speak directly with a Colorado licensed wastewater contractor. We review engineering plans, conduct site visits, and prepare competitive installation proposals.

📞 720-883-3390

📍 16570 Timber Cove St
Hudson, CO 80642

Our Colorado Service Coverage

Weld County

Boulder County (Local Office)

Larimer County

Adams & Broomfield

Jefferson County

Arapahoe County