2026 OSSF designated
representative module 3, 4 & Module
5 | 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 3, 4 & 5 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
1
, treatment units, low-pressure dosing, and secondary
treatment, alongside the DR’s duty to inspect these systems at
specific construction stages.
Quiz_________________?
Site Evaluation -
jibu✅
must be completed by a licensed Site Evaluator or
Professional Engineer
Quiz_________________?
Site Evaluation Criteria -
jibu✅
-Soil analysis
-Groundwater evaluations
-Topography
-Flood Hazard
-Separation requirements (setbacks)
Quiz_________________?
Soil Analysis -
jibu✅
2
, expose soil profile to a depth of two feet below the
proposed disposal system excavation
Quiz_________________?
Groundwater Evaluation -
jibu✅
any soil profile that demonstrates the presence of a high
water table, within 24 inches of the bottom of the
proposed drain field, should be considered unsuitable
Quiz_________________?
Topography -
jibu✅
slope patterns of the site shall be indicated on site plan.
Slopes greater than 30% are considered unsuitable
Quiz_________________?
Flood Hazard -
jibu✅
use maps from FEMA. 100-year flood boundaries shall be
clearly indicated on the site plan
3
representative module 3, 4 & Module
5 | 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 3, 4 & 5 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
1
, treatment units, low-pressure dosing, and secondary
treatment, alongside the DR’s duty to inspect these systems at
specific construction stages.
Quiz_________________?
Site Evaluation -
jibu✅
must be completed by a licensed Site Evaluator or
Professional Engineer
Quiz_________________?
Site Evaluation Criteria -
jibu✅
-Soil analysis
-Groundwater evaluations
-Topography
-Flood Hazard
-Separation requirements (setbacks)
Quiz_________________?
Soil Analysis -
jibu✅
2
, expose soil profile to a depth of two feet below the
proposed disposal system excavation
Quiz_________________?
Groundwater Evaluation -
jibu✅
any soil profile that demonstrates the presence of a high
water table, within 24 inches of the bottom of the
proposed drain field, should be considered unsuitable
Quiz_________________?
Topography -
jibu✅
slope patterns of the site shall be indicated on site plan.
Slopes greater than 30% are considered unsuitable
Quiz_________________?
Flood Hazard -
jibu✅
use maps from FEMA. 100-year flood boundaries shall be
clearly indicated on the site plan
3
