OSSF & Septic System Engineering Design
ALFA Engineering provides On-Site Sewage Facility (OSSF) and septic system engineering design for residential and commercial properties across Texas. ALFA Engineering, LLC, a Texas-licensed professional engineering firm, delivers TCEQ 30 TAC Chapter 285 compliant designs for conventional, aerobic, low-pressure, and drip dispersal systems.
Service Scope
- •On-Site Sewage Facility (OSSF) and septic system design for residential and commercial properties across Texas
- •Conventional gravity and pressure-distribution septic system design
- •Aerobic treatment unit (ATU) and aerobic septic system engineering design
- •Low-pressure dosing and drip dispersal system design
- •Site and soil evaluation coordination for OSSF site suitability determination
- •TCEQ 30 TAC Chapter 285 compliant OSSF design and construction documents
- •OSSF permit application preparation and coordination with local authorized agents
- •Repair and replacement system design for failing or non-compliant septic systems
Typical Deliverables
Project Types
Our Process
Site and Soil Evaluation
Coordinate site and soil evaluation to determine OSSF suitability, including soil texture, loading rate, and site constraints per TCEQ 30 TAC Chapter 285 requirements.
System Selection
Select the appropriate OSSF system type (conventional, aerobic, low-pressure, or drip) based on soil conditions, site size, and estimated wastewater flow.
Design and Construction Documents
Prepare OSSF design documents, layout drawings, and specifications compliant with TCEQ regulations for permit submittal.
Permit Coordination
Prepare and coordinate the OSSF permit application with the local authorized agent or permitting authority having jurisdiction.
Installation Support
Provide installation-phase questions and field verification support as needed to ensure system compliance.
Texas Permitting & Jurisdiction
OSSF permits in Texas are regulated by TCEQ under 30 TAC Chapter 285 and are issued by local authorized agents, which may include county health departments, river authorities, or special districts depending on the property location. ALFA Engineering prepares TCEQ-compliant OSSF design documents and coordinates the permit application with the applicable local authorized agent for your project location.
ALFA Engineering is a Texas-licensed professional engineering firm. We do not represent TCEQ or any local authorized agent. Final OSSF permit approval is determined by the applicable permitting authority.
Frequently Asked Questions
Need a Septic System Engineer?
Contact ALFA Engineering for OSSF and septic system design, including aerobic systems and replacement systems. ALFA Engineering, LLC, a Texas-licensed professional engineering firm, is ready to help.