2026 OSSF designated representative
module 1&2 Comprehensive Questions and
Answers | 100% Correct | A Grade
Description
This OSSF Designated Representative (DR) exam (specifically related to Texas
Commission on Environmental Quality (TCEQ) course WWW305) evaluates a
candidate's ability to enforce OSSF rules, review permit applications, and conduct
site inspections.
This exam covers modules 1 & 2 of this six primary Modules:
• Module 1: Introduction & Regulations. Covers the history of OSSF regulation
in Texas (starting in 1989), roles and responsibilities of DRs versus
installers/site evaluators, and the types of legal penalties (criminal, civil, and
administrative) for violations.
• Module 2: Basic OSSF Math. Focuses on calculations required for site
evaluation and system design, including trench width conversions, lot area in
acres, septic tank volume in gallons, and gravel requirements in cubic yards.
• Module 3: Wastewater & Public Health. Addresses pathogenic
microorganisms in domestic wastewater (bacteria, viruses, protozoa,
helminths) and the diseases they cause, such as typhoid, cholera, and
dysentery.
• Module 4: Permitting Process. Outlines the 9-step permitting process,
including site/soil evaluation, planning by a PE or RS, application review,
"Authorization to Construct" (ATC), and the final "Notice of Approval"
(NOA).
• Module 5: Site Evaluation & Soil. Detailed review of soil characteristics, site
suitability, and separation distances (e.g., the "Ten Acre Rule" for permit
exemptions).
• Module 6: System Design & Inspection. Focuses on the technical standards
for different systems like aerobic treatment units, low-pressure dosing, and
secondary treatment, alongside the DR’s duty to inspect these systems at
specific construction stages.
1
, Quiz_________________?
1989 -
Answer
prior to 1989, there were no statewide regulation of septic tanks or
OSSF
Quiz_________________?
September 1989 -
Answer
beginning of statewide regulation of OSSF across Texas
Quiz_________________?
September 2002 -
Answer
TCEQ responsible for enforcing OSSF laws and regulations
Quiz_________________?
Chapter 285 -
Answer
minimum state rules
2
, Quiz_________________?
Chapter 366 -
Answer
regulates septic tanks and all types of OSSFs statewide
gives local government the right to adopt local regulations which are
more stringent than the state OSSF law or rules
Quiz_________________?
On-site sewage disposal system -
Answer
-produce not more than 5,000 gallons of waste each day
-are used only for disposal of sewage produced on the site where the
system is located
-dispose wastewater on-site into the soil or as a vapor to the
atmosphere
Quiz_________________?
3
, Agency / Commission -
Answer
TCEQ is the state agency responsible for making sure that OSSF laws,
rules, and regulations are enforces statewide
Quiz_________________?
Authorized Agent -
Answer
local government entity authorized by TCEQ
(in areas with no authorized agent, TCEQ staff will enforce)
Quiz_________________?
Local Government -
Answer
cities, counties, river authorities, and special districts (water districts
and municipal utility districts)
Quiz_________________?
Designated Representative -
4
module 1&2 Comprehensive Questions and
Answers | 100% Correct | A Grade
Description
This OSSF Designated Representative (DR) exam (specifically related to Texas
Commission on Environmental Quality (TCEQ) course WWW305) evaluates a
candidate's ability to enforce OSSF rules, review permit applications, and conduct
site inspections.
This exam covers modules 1 & 2 of this six primary Modules:
• Module 1: Introduction & Regulations. Covers the history of OSSF regulation
in Texas (starting in 1989), roles and responsibilities of DRs versus
installers/site evaluators, and the types of legal penalties (criminal, civil, and
administrative) for violations.
• Module 2: Basic OSSF Math. Focuses on calculations required for site
evaluation and system design, including trench width conversions, lot area in
acres, septic tank volume in gallons, and gravel requirements in cubic yards.
• Module 3: Wastewater & Public Health. Addresses pathogenic
microorganisms in domestic wastewater (bacteria, viruses, protozoa,
helminths) and the diseases they cause, such as typhoid, cholera, and
dysentery.
• Module 4: Permitting Process. Outlines the 9-step permitting process,
including site/soil evaluation, planning by a PE or RS, application review,
"Authorization to Construct" (ATC), and the final "Notice of Approval"
(NOA).
• Module 5: Site Evaluation & Soil. Detailed review of soil characteristics, site
suitability, and separation distances (e.g., the "Ten Acre Rule" for permit
exemptions).
• Module 6: System Design & Inspection. Focuses on the technical standards
for different systems like aerobic treatment units, low-pressure dosing, and
secondary treatment, alongside the DR’s duty to inspect these systems at
specific construction stages.
1
, Quiz_________________?
1989 -
Answer
prior to 1989, there were no statewide regulation of septic tanks or
OSSF
Quiz_________________?
September 1989 -
Answer
beginning of statewide regulation of OSSF across Texas
Quiz_________________?
September 2002 -
Answer
TCEQ responsible for enforcing OSSF laws and regulations
Quiz_________________?
Chapter 285 -
Answer
minimum state rules
2
, Quiz_________________?
Chapter 366 -
Answer
regulates septic tanks and all types of OSSFs statewide
gives local government the right to adopt local regulations which are
more stringent than the state OSSF law or rules
Quiz_________________?
On-site sewage disposal system -
Answer
-produce not more than 5,000 gallons of waste each day
-are used only for disposal of sewage produced on the site where the
system is located
-dispose wastewater on-site into the soil or as a vapor to the
atmosphere
Quiz_________________?
3
, Agency / Commission -
Answer
TCEQ is the state agency responsible for making sure that OSSF laws,
rules, and regulations are enforces statewide
Quiz_________________?
Authorized Agent -
Answer
local government entity authorized by TCEQ
(in areas with no authorized agent, TCEQ staff will enforce)
Quiz_________________?
Local Government -
Answer
cities, counties, river authorities, and special districts (water districts
and municipal utility districts)
Quiz_________________?
Designated Representative -
4
