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Pennsylvania Sewage Enforcement Officer (SEO)
Certification Exam QUESTIONS AND VERIFIED
ANSWERS LATEST UPDATE THIS YEAR
Pennsylvania Sewage Enforcement Officer (SEO) Certification Exam preparation package. It includes a
detailed, point-form summary of the exam coverage based on the official Pennsylvania Department of
Environmental Protection (PA DEP) SEO Manual and regulations,
POINT-FORM SUMMARIZED EXAM COVERAGE
• Primary Regulatory Authority: Pennsylvania Department of Environmental Protection (PA DEP)
under the Pennsylvania Sewage Facilities Act (Act 537) .
• Core Mission: Review permit applications, conduct site evaluations, inspect on-lot sewage
systems, issue permits for repairs/new construction, enforce Act 537 regulations .
• Exam Logistics (PA DEP SEO Certification):
o 2-hour timed exam
o 100 multiple-choice questions
o Passing score: 70% (70 correct answers)
o Open book? No (closed book)
o Administered through PA DEP training centers
• Key Legal Frameworks:
o Act 537 – Pennsylvania Sewage Facilities Act (requires official plans, permitting)
o PA Title 25 Environmental Protection, Chapters 71, 72, 73 (sewage facilities regulations)
o PA Construction Code Act (where applicable)
• On-Lot Sewage System Components (Conventional & Alternative):
o Septic Tank: Inlet/outlet baffles (devices), scum/ sludge layers (scum thickness ≤ 1/3
liquid depth), minimum 1,000 gallons (single-family), risers with gas-tight covers
o Distribution Box: Evenly splits effluent to absorption trenches
o Absorption Trenches: Gravel-filled, perforated pipe, minimum separation to limiting
zone (seasonal high water table, bedrock)
o Alternative Systems: Sand mound, drip irrigation, aerobic treatment unit (ATU), low-
pressure pipe (LPP), evapotranspiration
o Seepage pits, cesspools: Limited use (cesspools prohibited in most PA)
• Soil & Site Evaluation Procedures:
o Deep-hole test (backhoe or hand auger): Minimum depth 60 inches or to limiting zone
o Percolation (perc) test: Determine soil absorption rate (minutes per inch)
o Textural analysis (ribbon test, feel method)
o Limiting zones: Seasonal high water table (SHWT), bedrock (rock or fragipan), creviced
bedrock, impervious layer
o Depth to limiting zone – determines system type: deep (>60") = conventional; shallow
(10-60") = elevated sand mound or other
• Soils & Site Limitations:
o USCS soil types (gravel, sand, silt, clay) – clay slow perc.
o Hydraulic conductivity (Ksat) – rate water moves through soil
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o Prohibited areas: Floodplains 100-year, within 100 ft of water supply wells, 50 ft of
streams/reservoirs, on steep slopes (>25% for conventional, >15% alternative with
restrictions)
• System Sizing Requirements:
o Bedroom count + fixture units → daily design flow (gpd)
o Absorption area (sq ft) required = design flow / loading rate
o Trench length = absorption area / trench width
o Loading rate (gal/day/sq ft) based on percolation test or soil texture (fast = 1.2; slow =
0.2 gpd/sq ft)
• Permitting & Administrative Procedures:
o When is a permit required? (new construction, repair, replacement)
o Permit issuance, site inspection, as-built drawings, operation & maintenance (O&M)
agreements
o Repair permit – for system failure (surface breakout, backed-up sewage)
o Act 537 official plan amendments
• Environmental Protection & Setbacks:
o Water supply well – 100 ft horizontal separation
o Streams, reservoirs – 50 ft
o Property lines – 10-20 ft (varies)
o Buildings, foundations – 10-20 ft
o Driveways – 5-10 ft
o Water service lines – 10 ft
o Slope restrictions (>25% conventional, >15% alternative)
• Alternative Systems (Specialized):
o Sand mound: pressurization network, load distribution, sand fill, topsoil cap
o Drip irrigation: advanced treatment required (ATU), pressure-dosed, drip tubing 6"
below surface
o Evapotranspiration (ET) bed: shallow, relies on evaporation/transpiration (low rainfall,
sunny)
o Low-pressure pipe (LPP): small diameter pipes, small orifices, lower loading rates
• Operation, Maintenance, & Inspections:
o Septic tank pumping schedule (every 3–5 years)
o Routine maintenance inspections
o Sewage Enforcement Officer vs. Certified Sewage Evaluator vs. Professional Engineer
• Safety & Wellhead Protection:
o Confined space entry (septic tank)
o Exposure to sewage (pathogens)
o Wellhead setback distances
• Ethics & Enforcement:
o Conflict of interest, accurate reporting
o Penalties for violations: fines, imprisonment (summary offense to felony)
• Additional PA-Specific:
o Sludge disposal – biosolids regulations (DEP)
o Septage haulers – registration requirements
, Page 3 of 120
1. The primary state regulation that governs sewage enforcement activities in Pennsylvania is:
A) The Clean Water Act
B) Act 537 (Pennsylvania Sewage Facilities Act)
C) Title 40 CFR
D) The PA Construction Code
Answer: B
Rationale: Act 537 is the core Pennsylvania statute that requires official plans, permitting, and
enforcement for on-lot sewage systems.
2. Under Act 537, a property owner must obtain a sewage permit before:
A) Installing a new septic system
B) Replacing an existing septic tank
C) Repairing a failed absorption area
D) All of the above
Answer: D
Rationale: Act 537 requires permits for new construction, system replacement, and repairs to failed
systems.
, Page 4 of 120
3. What is the minimum required depth for a deep-hole soil test to identify limiting zones?
A) 48 inches
B) 60 inches
C) 72 inches
D) 36 inches
Answer: B
Rationale: PA DEP regulations require deep holes to be excavated to a minimum of 60 inches or until a
limiting zone (bedrock, seasonal high water table) is encountered.
4. Which of the following is considered a "limiting zone" for a conventional on-lot sewage system?
A) Sandy loam soil to 48 inches
B) Seasonal high water table (SHWT) within 60 inches of the surface
C) Gravel layer at 36 inches
D) Red clay at 48 inches
Answer: B
Rationale: Seasonal high water table is a limiting zone; systems require a minimum separation of 12
inches above SHWT or 24 inches depending on design.
Pennsylvania Sewage Enforcement Officer (SEO)
Certification Exam QUESTIONS AND VERIFIED
ANSWERS LATEST UPDATE THIS YEAR
Pennsylvania Sewage Enforcement Officer (SEO) Certification Exam preparation package. It includes a
detailed, point-form summary of the exam coverage based on the official Pennsylvania Department of
Environmental Protection (PA DEP) SEO Manual and regulations,
POINT-FORM SUMMARIZED EXAM COVERAGE
• Primary Regulatory Authority: Pennsylvania Department of Environmental Protection (PA DEP)
under the Pennsylvania Sewage Facilities Act (Act 537) .
• Core Mission: Review permit applications, conduct site evaluations, inspect on-lot sewage
systems, issue permits for repairs/new construction, enforce Act 537 regulations .
• Exam Logistics (PA DEP SEO Certification):
o 2-hour timed exam
o 100 multiple-choice questions
o Passing score: 70% (70 correct answers)
o Open book? No (closed book)
o Administered through PA DEP training centers
• Key Legal Frameworks:
o Act 537 – Pennsylvania Sewage Facilities Act (requires official plans, permitting)
o PA Title 25 Environmental Protection, Chapters 71, 72, 73 (sewage facilities regulations)
o PA Construction Code Act (where applicable)
• On-Lot Sewage System Components (Conventional & Alternative):
o Septic Tank: Inlet/outlet baffles (devices), scum/ sludge layers (scum thickness ≤ 1/3
liquid depth), minimum 1,000 gallons (single-family), risers with gas-tight covers
o Distribution Box: Evenly splits effluent to absorption trenches
o Absorption Trenches: Gravel-filled, perforated pipe, minimum separation to limiting
zone (seasonal high water table, bedrock)
o Alternative Systems: Sand mound, drip irrigation, aerobic treatment unit (ATU), low-
pressure pipe (LPP), evapotranspiration
o Seepage pits, cesspools: Limited use (cesspools prohibited in most PA)
• Soil & Site Evaluation Procedures:
o Deep-hole test (backhoe or hand auger): Minimum depth 60 inches or to limiting zone
o Percolation (perc) test: Determine soil absorption rate (minutes per inch)
o Textural analysis (ribbon test, feel method)
o Limiting zones: Seasonal high water table (SHWT), bedrock (rock or fragipan), creviced
bedrock, impervious layer
o Depth to limiting zone – determines system type: deep (>60") = conventional; shallow
(10-60") = elevated sand mound or other
• Soils & Site Limitations:
o USCS soil types (gravel, sand, silt, clay) – clay slow perc.
o Hydraulic conductivity (Ksat) – rate water moves through soil
, Page 2 of 120
o Prohibited areas: Floodplains 100-year, within 100 ft of water supply wells, 50 ft of
streams/reservoirs, on steep slopes (>25% for conventional, >15% alternative with
restrictions)
• System Sizing Requirements:
o Bedroom count + fixture units → daily design flow (gpd)
o Absorption area (sq ft) required = design flow / loading rate
o Trench length = absorption area / trench width
o Loading rate (gal/day/sq ft) based on percolation test or soil texture (fast = 1.2; slow =
0.2 gpd/sq ft)
• Permitting & Administrative Procedures:
o When is a permit required? (new construction, repair, replacement)
o Permit issuance, site inspection, as-built drawings, operation & maintenance (O&M)
agreements
o Repair permit – for system failure (surface breakout, backed-up sewage)
o Act 537 official plan amendments
• Environmental Protection & Setbacks:
o Water supply well – 100 ft horizontal separation
o Streams, reservoirs – 50 ft
o Property lines – 10-20 ft (varies)
o Buildings, foundations – 10-20 ft
o Driveways – 5-10 ft
o Water service lines – 10 ft
o Slope restrictions (>25% conventional, >15% alternative)
• Alternative Systems (Specialized):
o Sand mound: pressurization network, load distribution, sand fill, topsoil cap
o Drip irrigation: advanced treatment required (ATU), pressure-dosed, drip tubing 6"
below surface
o Evapotranspiration (ET) bed: shallow, relies on evaporation/transpiration (low rainfall,
sunny)
o Low-pressure pipe (LPP): small diameter pipes, small orifices, lower loading rates
• Operation, Maintenance, & Inspections:
o Septic tank pumping schedule (every 3–5 years)
o Routine maintenance inspections
o Sewage Enforcement Officer vs. Certified Sewage Evaluator vs. Professional Engineer
• Safety & Wellhead Protection:
o Confined space entry (septic tank)
o Exposure to sewage (pathogens)
o Wellhead setback distances
• Ethics & Enforcement:
o Conflict of interest, accurate reporting
o Penalties for violations: fines, imprisonment (summary offense to felony)
• Additional PA-Specific:
o Sludge disposal – biosolids regulations (DEP)
o Septage haulers – registration requirements
, Page 3 of 120
1. The primary state regulation that governs sewage enforcement activities in Pennsylvania is:
A) The Clean Water Act
B) Act 537 (Pennsylvania Sewage Facilities Act)
C) Title 40 CFR
D) The PA Construction Code
Answer: B
Rationale: Act 537 is the core Pennsylvania statute that requires official plans, permitting, and
enforcement for on-lot sewage systems.
2. Under Act 537, a property owner must obtain a sewage permit before:
A) Installing a new septic system
B) Replacing an existing septic tank
C) Repairing a failed absorption area
D) All of the above
Answer: D
Rationale: Act 537 requires permits for new construction, system replacement, and repairs to failed
systems.
, Page 4 of 120
3. What is the minimum required depth for a deep-hole soil test to identify limiting zones?
A) 48 inches
B) 60 inches
C) 72 inches
D) 36 inches
Answer: B
Rationale: PA DEP regulations require deep holes to be excavated to a minimum of 60 inches or until a
limiting zone (bedrock, seasonal high water table) is encountered.
4. Which of the following is considered a "limiting zone" for a conventional on-lot sewage system?
A) Sandy loam soil to 48 inches
B) Seasonal high water table (SHWT) within 60 inches of the surface
C) Gravel layer at 36 inches
D) Red clay at 48 inches
Answer: B
Rationale: Seasonal high water table is a limiting zone; systems require a minimum separation of 12
inches above SHWT or 24 inches depending on design.
