WHAT WE CAN DO FOR YOU
Details on what is included in each service and what the state requires is listed below. The price list will provide prices for these services.
UTAH SERVICES
SOIL CLASSIFICATION & PERCOLATION TESTING
Step One
Before a septic system can be designed a certified Level 1 Onsite Wastewater Professional must classify the soils on the property and determine if additional testing is needed. Â
A soil pit must be dug to at least ten feet by a heavy equipment operator and the soils classified by texture and structure. Depending on the type of soil, a percolation test may also be required by the regulating authority. A percolation test will not be performed by Thevenin Environmental unless it is required by the regulating authority.
Percolation tests for type 1 soils may only take 1-2 hours while soil types 4, 5, & 6 may take up to 34 hours.
LAB TESTS
Clay Soils
Additional soil testing may be required when the system is to be installed in soils that have a high clay content. Percolation testing alone may not be enough to ensure proper liquid distribution will occur. Soils will be sent to Utah State University for a hydrometer test and structure classification.
SITE ASSESSMENT
Lay of the Land
A site assessment is performed before a septic system can be designed. Factors such as ground slope, presence of vegetation, lot size, limiting factors, etc. all play a part in what type of system will be designed and where it will be placed on a lot. Â
This step can either be performed at the same time as the soils classification or independently if the soils classification was performed by another company at an earlier time.
SEPTIC SYSTEM DESING
Conventional vs Alternative
Septic systems must adhere to Utah State Code R317-4 and be designed by a certified Onsite Wastewater Professional. Each system must be designed specifically for the home and terrain in which it is placed as well as the soils type. A soils classification and site visit must be completed before a System Design can be developed.
Conventional Septic System designs require a Level 2 Onsite Wastewater Professional, are usually designed for facilities that have a daily wastewater flow of less than 3000 GPD, and do not have limiting factors such as soil or lot constraints. These plans include a site plan, trench detail, and a detailed design summary.
Alternative Septic System designs require a Level 3 Onsite Wastewater Professional, are larger in nature, and are usually installed on lots with limiting site conditions. These systems require a more detailed system design and maintenance schedule.
HEALTH DEPARTMENT FILING FEES
Southwest Utah Public Health Department (SWUPHD)
Thevenin Environmental is based in Southwest Utah and works directly with the Southwest Utah Public Health Department to obtain permitting for onsite wastewater systems. SWUPHD determines their filing fees and these fees must be paid directly to SWUPHD.
ARIZONA SERVIES
SITE INVESTIGATION
Stage I
Arizona requires that soils tests be performed by an Environmental Quality Specialist that is employed by Coconino County (or county of job location). An application must be submitted prior to the EQ Specialist visiting the site and soil pits must also be dug prior to inspection.
Choosing the location of these test pits is a crucial step as they will determine the location of your septic system. Having an understanding of site limitations, system design, and setback requirements is a must in order to avoid delays in approvals or costly re-submittals.   Â
Thevenin Environmental will provide you with that expertise and help you file any required paperwork.
DESIGN & CONSTRUCTION AUTHORIZATION
Stage II
Septic systems must adhere to Arizona State Code R18-9. Each system must be designed specifically for the home and terrain in which it is to serve as well as the soils type. This process can take anywhere from 6-9 months and requires several documents including but not limited to: a septic system design satisfying all items on the plot plan checklist with a cross section of the trench detail and slope configuration, materials list, system sizing worksheet, disposal field worksheet, flood zone reports and any other supplemental documentation the CCCDEQ may require.
In addition to creating all of these documents for you, I am willing to file said documents on the Coconino County Public Portal and managing all follow up activities.
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DISCHARGE AUTHORIZATION REQUEST
Stage III
Once the System has been approved and installed a tank water tightness test must be performed, a Dishcarge Authorization Request and As-Built drawing submitted, and an inspection scheduled. Thevenin Environmental can accomplish all of this for you.
CCCDEQ FILING FEES & ONLINE PORTAL
Coconino County Community Development Environmental Quality
In order to apply for a Site Investigation, Design & Construction Authorization, and Discharge Authorization an account must be developed on the Coconino County Public Portal. Each stage of the application process must be completed and all documents submitted through this portal. Fees will also be collected through this portal. Fees are predetermined by the CCCDEQ and must be submitted prior to application submittal. Â
It is important to note that if you do not submit required documentation upon initial review of applications, additional fees may be requested by the CCCDEQ EQ Specialist.