About

 Learn about our History, Design Team, Design Process, and also some Septic System Resources 

About Us

A Legacy of Reliable Septic Design Solutions

We are a father/son team specializing in completing septic design projects as fast as possible–for a reasonable price! The business has its roots in the 70s when Frank began designing septic systems in Bexar County, as well as the surrounding counties. He was primarily a solo enterprise for several decades, although he had some help from time to time. However, he was joined in 2021 by his only son, Fernando, who has a professional background in the healthcare industry.  They partnered together in Septic Systems Express for several years until 2025, when Fernando took the lead in our new venture, Superfast Septic Designs.

Interesting Facts About Our Company

  • Frank has the longest-held Registered Sanitarian license (#994) in the state of Texas–with 50  years of experience designing systems in Bexar and the surrounding counties.
 
  • Fernando, who was trained by Frank, now  holds the same license, making them an unusual Father/Son Design  Team combination.
 
  • Fernando is a  “career changer”.  He joined the wastewater industry after a successful 30 year career in healthcare as a Pediatric Speech Therapist.  

Professional Septic Design Team

Frank Aguirre

Frank Aguirre, Legacy Designer RS #994, TCEQ DR 30400, TCEQ SE 10807 Frank currently administers some projects and designs, as well as Site Certifications. He also consults with Fernando as needed for special design situations. He has had a long and storied career as a septic designer in south-central Texas. Listed are a few of his many professional accomplishments/achievements over the past five decades: Professional Sanitarian since May 1968, License #994 · Bachelor’s degree in biology; Master’s degree in Educational Psychology · Past head of SAW’s Water Quality Division in the early 70’s; responsible for the quality of the drinking water for all of San Antonio; supervision of well drilling · Founder, Alamo Area On-site Wastewater Association · Past Director, President and active member, Texas On-site Wastewater Association · Founder, Alamo Area Water/Wastewater Laboratory Analysts Association · Co-founder, Texas Water/Wastewater Laboratory Analysts Association · Previous Board Director, active member National Onsite Wastewater Recycling Association · Real estate inspections work, previous member, National Association of Wastewater Technicians · Past author of numerous newsletter articles and contributor to many septic publications

Fernando Aguirre

Fernando Aguirre, Principal Designer RS #5402, TCEQ DR 36532, TCEQ SE 36623 Fernando currently provides the majority of the field work, communications, designs, and administrative support for most projects. Fernando grew up in San Antonio, but left for over 30 years before returning to join the family business. The wastewater industry is a second career for him, as he has already served for 30+ years as a certified Speech Therapist, specializing in the pediatric population. He is married to a fantastic wife—Cathe—since 1997, and has four children, with his oldest in graduate school, the two middle two are in college and the youngest is in high school. He loves to be outdoors-especially hiking and running as well as camping. Fernando also enjoys to learn new things, enjoys reading and listening to audio books.

Our Process

Efficient Septic Design

Why you need one

Let’s start with why a homeowner needs a septic system when they do not have public sewage available to them. Occasionally, this happens in the middle of an incorporated city, but this is less common. Nation wide about 20% of new homes being built are being constructed in areas which require septic systems. Today about 5 million Texans rely on septic systems (sometimes called “On-Site Sewage Facilities” or “OSSF”) to dispose of their domestic wastes.

What is a septic system

Or, “On-Site Sewage Facility”? Basically, a septic system receives the waste from a home or business, treats it so that it is cleaned up, and recycles it back to the environment, all in the confines of the property boundary. The general process is Collection, Treatment, and Recycling.

Design Specialties

Super Fast Septic Designs specializes in a number of kinds of systems, all based on the soil, home or the business, the property characteristics, and the unique needs of the owner. The descriptions below cover about 95% of the systems that are recommended and designed by Septic Systems Express.

Septic Help Desk: FAQs

Below are some of the most common questions we are asked, and our responses.  

A proper survey or plat should show easements and other important features we may need to be aware of when completing your design.  Additionally, when we complete designs we draw everything to-scale, meaning in proportion to the way it really is.  The best way to do this is to use a professionally produced to-scale diagram of the property whenever possible.  

Our local counties appear to prefer professional surveys or plats for septic design applications.  However, if one is unavailable we are sometimes able to use a publicly available county appraisal map, if the local jurisdiction permits that.  This document is less preferred as it does not have any easements, and may have less accurate property boundaries, as well as less accurate house footprint information.  

There are a number of rules related to wells—both private and public.  The general state rule is that the septic recycling area (IE your drainfield, spray field, or dripfield) needs to be 100’ from the well.  However, your county may be more strict.  For example, Bexar county generally requires 150’ from a private well to the septic recycling area.

An ATC is your County Approval, and is short of “Authorization To Construct”.  (In Comal this is called PTC, which is “Permit To Construct”).  This is the official jurisdiction approval to start digging your system.  After the system is installed it is inspected by the county.  When it passes inspection you obtain your LTO, or “License to Operate”.  This means your system was installed correctly, per plan, and is ready to go. 

Residential or household systems are basically sized according to the number of bedrooms in the home, and the home living area square feet. These two figures drive the size of the tank (or ATU), and the size of the recycling area, such as the drainfield, sprayfield, or dripfield.  (Texas Ch. 285 May 2017 Rules, Page 105)

 

Commercial systems are sized a bit differently, as there are many types of businesses and facilities.  Texas Ch. 285 May 2017 Rules, Page 105-106 provides guidance on some non-residential systems.  However, it is recommended that when those figures are considered they simply be used as a starting point, as the real-life flows may be higher—which the business owners should take take the time to investigate and research.

The general rule with ATU spray and pools is that the edge of the spray needs to be at least 25’ from any part of the pool.  (Note: Driplines are different as they are underground and may be installed 5’ from the pool)

Yes, you should have your ATU pumped periodically.  Your unit should be under contract and inspected every 4 months.  You may ask your Maintenance Provider for recommendations on when it needs to be pumped, as individual homes and usage vary.

An aerobic maintenance contract is an agreement between a septic company (or Maintenance Provider) to regularly service your unit.  This contract is generally an initial 2 year contract, with 4 month service intervals.  This contract is necessary to receive Approval for new permit applications, and is also important to the life and long term functioning of your unit.  Some jurisdictions allow home owners to take over the maintenance after a few years.  If your area allows this practice, and you want to attempt it, we recommend you get trained, which is available through TEEX and is called OSSF-Homeowner Aerobic Treatment & Surface Appl. System Op and Maint

An Aerobic Affidavit is TCEQ/State-mandated document that basically states you have (or will have) an aerobic unit and you pledge to have it under a maintenance contract the first 2 years.  The document also states that after the initial 2 years you will obtain a new contract, or maintain it personally if local regulations allow.  The document must be Notarized and filed with the county clerk, then turned in with your septic application.  

We currency accept the following payment options:  Check, cash, Cash App, or Zelle.  

For standard/conventional systems the fees are usually a design fee and a permit fee.  For aerobic systems the fees are usually a design fee, a small Affidavit processing fee, and a permit fee.  However, keep in mind that some counties will ask for additional fees than mentioned above—such as driveway fees, development fees, or flood zone permit fees.  

In general, the type of system you need is driven by what kind of soil you have at the potential site. (The strength of your wastewater can also affect system type—but that is for another day). Texas breaks down the kind of soil we have here in the greater Bexar County area into four groups, called Class Ib, Class II, Class III, and Class IV.

Classes Ib, Class II, and Class III are generally sandy, loamy, or a mixture containing either sand or loam, and are suitable for standard/conventional systems. Class IV may generally be described as silty clay, or clay. Potential septic sites with this Class IV type of soil indicate a need for aerobic treatment with either spray or drip dispersion (recycling).

In Texas septic-related soil determinations are most often completed by TCEQ-Licensed Soil Evaluators, a license we also hold, in addition to our Texas Registered Sanitarian licenses. 

As professional septic designers, naturally we recommend you consider a TCEQ-licensed Installer to install your system.  Incidentally there are two levels of TCEQ septic (or OSSF—On Site Sewage Facility) Installers—Level I and Level II.  What’s the difference?  In general, Level I licensees may install standard or conventional systems, and Level II licensees may install either standard/conventional or aerobic systems.  Note:  Texas has a general regulation that homeowners may install their own standard system, if local regulations allow, but never an aerobic system.  Be aware that homeowners who are permitted by regulations to attempt this feat must undergo regular County inspection, just as a licensed Installer would.

The primary factors which affect the need to pump are the number of occupants/users, the amount of  domestic wastewater produced, and the volume of solids in the flows.  (For example, using a garbage disposal adds to the amount of solids which must be processed, or broken down).  As a general rule of thumb, most professionals agree every 3-5 years is average, but every system and situation is different.  We would say— “When it doubt, pump it out!” 

Do not Flush or Drain:  There are certain things which should not be flushed or put down the sink because they may negatively affect the biological processes all systems use, or they could clog system components—both of which could lead to system malfunctioning and possible repair needs.  Do Not Flush:  Wipes of any kinds (even if they say “flushable”), hair trimmings, coffee grounds, dental floss, disposable diapers, kitty litter, sanitary napkins, tampons, cigarette butts, condoms, gauze bandages, or paper towels.  Take care to avoid FOG (fat, oil, grease) items, which are particularly hard to break down.  Never flush/drain the following, which could contaminate surface or ground waters:  paints, varnishes, thinners, waste oils, photographic solutions, or pesticides.  (Source:  NOWRA/TEEX)

  •  Never drive over any tanks or units, which could damage them.  Avoid overloading your system.  
  • Be conservative with water use—do not leave on “running faucets”, do not allow plumbing/water leaks to go unrepaired, and try to split up high usage events on different days when possible—such as running multiple loads of laundry in a single day.  Remember—you are not on city sewer—your system was designed with a certain capacity in mind and can be overloaded, with detrimental effects.  
  • The Recycling Area—underground drainfields, leaching chambers, dripfields, or above-ground surface spray areas:  Do not drive over these areas with vehicles or heavy equipment.  Avoid planting trees or bushes in underground recycling areas to help reduce the chance of root intrusion.  Keep recycling areas natural with grass or appropriate mixed plants—and avoid concrete, driveways, property improvements, mulch, or gravel/rock.

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