PASSPOINT PRO
PROFESSIONAL LICENSING EXAM PREP
PRACTICE EXAM
New Hampshire Septic System
Installer Study Guide
Study Guide + 150-Question Final Review
150 ANSWER KEY AT END STUDY GUIDE + FINAL
QUESTIONS FORMAT FOCUS
WHAT THIS PRODUCT COVERS
Condensed rule & construction review
Field calculations and installation decisions
150-question final review exam
CURRENT RULE BASIS
RSA 485-A | Env-Wq 1000
Practice. Understand. Perform.
,PASSPOINT PRO NH SEPTIC SYSTEM INSTALLER - STUDY GUIDE
HOW TO USE THIS RESOURCE
This PassPoint Pro resource contains 150 original multiple-choice questions. Complete the question section first, then use the
detailed answer key and rationales at the end for review. Compare every field decision with the approved plan and current New
Hampshire requirements.
RULE BASIS RSA 485-A | Env-Wq 1000
CONDENSED STUDY GUIDE
1 Installer Permit & Scope
A New Hampshire installer must understand both the legal authority for the permit and the practical duty to build exactly what was
approved. Focus on RSA 485-A:29-36, permit eligibility, the $80 application/renewal framework, the biennial permit cycle, and the
department’s ability to use written and/or oral examination. Remember that the installer is responsible for work performed under the
installer permit number and must supervise that work.
2 Construction Approval Before Work
Do not treat a septic plan as an informal sketch. State law generally requires prior approval of plans and specifications before
construction of a building that will discharge sewage or before construction of the waste-disposal system. State requirements are
minimums, so local approvals can still apply.
3 Approved Plan = Final Plan
Env-Wq 1004 treats the approved plan as the final ISDS plan. Material changes such as changing the bed bottom, moving the bed more
than 10 feet, changing EDA type, or adding a pump to a gravity system can require new construction approval. The safest field habit is to
stop and resolve discrepancies before excavating or installing the changed component.
4 Inspection & Approval to Operate
The constructed ISDS cannot be covered or placed in operation before final inspection and approval. The building foundation/slab or
qualifying gravel pad must generally be in place before inspection. A partial inspection can be used in a limited site-constraint situation,
but approval to operate is withheld until the entire system is installed and inspected.
5 Sewer Lines
Know SDR 35 strength, the 18-inch water/sewer crossing separation, the SDR 26 sleeve exception extending 10 feet on each side,
long-run manhole/cleanout spacing, protection under wheel loads, and the 1% (about 1/8 inch per foot) slope from tank to distribution
box/EDA.
PassPoint Pro | New Hampshire Septic System Installer Page 2
,PASSPOINT PRO NH SEPTIC SYSTEM INSTALLER - STUDY GUIDE
6 Septic Tank Sizing
Up to four bedrooms generally require 1,250 gallons. Bedrooms five through twelve add 250 gallons each. Beyond that, formula-based
sizing applies. When tanks are installed in series, the first tank must contain at least two-thirds of total required capacity; ledge-tank
installations require twice the otherwise applicable total tank capacity.
7 Tank Installation Details
Tank bedding must be at least four inches of sand or crushed stone on a firm, uniform base. Backfill lifts cannot exceed 12 inches. Tanks
must be watertight, pipe connections must be watertight, the outlet sits 2-4 inches below the inlet, and access dimensions must support
future inspection and pumping.
8 Pumps & Alarms
Each sewage or effluent pump needs a visual and audible alarm in a centrally used area. The pump and alarm are on separate circuits.
Pump chambers are watertight, vented, accessible, and sized so each bed can be dosed at least three times per day.
9 Distribution Boxes
Use a distribution box for multiple beds, trenches, or pipes unless an approved serial or pressure distribution method is used. Outlet
bottoms must be at equal elevations. Incoming steep or pumped flow needs velocity reduction, and a box serving multiple EDAs must be
set on a concrete slab.
10 EDA Construction
Protect the infiltrative area from compaction, smearing, uncontrolled traffic, and storm runoff. Complete machine grading before installing
EDA components. Follow approved elevations and material thicknesses because the EDA’s treatment ability depends on the constructed
soil and distribution profile.
11 Trenches & Conduits
Effluent conduits must be SDR 35 equivalent or stronger. Supply piping from a distribution box is unperforated. Trench systems require
specified sand and stone layers; near large trees or dense shrubbery the stone depth beneath the leach pipe increases.
12 Pressure Distribution
Pressure distribution uses small-diameter perforated pipe supplied by a pump or siphon. The system is designed so discharge from each
hole is as equal as practical, with 75%-85% of network head lost as water exits through the perforations.
PassPoint Pro | New Hampshire Septic System Installer Page 3
, PASSPOINT PRO NH SEPTIC SYSTEM INSTALLER - STUDY GUIDE
13 Dry Wells & Raised EDAs
Dry wells have dedicated stone, spacing, unit, and abandonment requirements. Raised EDAs require careful site stripping and qualifying
clean fill. A retaining wall cannot substitute for the designed side slopes, and building elevation must allow gravity feed unless pumping is
part of the design.
14 Operation & Failure
Maintenance rules protect long-term system performance. Pump septic tanks when combined sludge/scum reaches one-third of tank
depth, maintain grease interceptors more aggressively, keep bulky/toxic waste out, and keep vehicles/livestock/heavy objects off the
EDA. Wet areas or disagreeable odors can signal possible failure.
15 Innovative/Alternative Technology
ITA systems can be provisional, general, or general with conditions. A provisional approval may allow up to 50 installations over up to five
years while performance data are gathered. Installers must follow any approved manufacturer manuals, O&M; provisions, and special
installation conditions.
PassPoint Pro | New Hampshire Septic System Installer Page 4
PROFESSIONAL LICENSING EXAM PREP
PRACTICE EXAM
New Hampshire Septic System
Installer Study Guide
Study Guide + 150-Question Final Review
150 ANSWER KEY AT END STUDY GUIDE + FINAL
QUESTIONS FORMAT FOCUS
WHAT THIS PRODUCT COVERS
Condensed rule & construction review
Field calculations and installation decisions
150-question final review exam
CURRENT RULE BASIS
RSA 485-A | Env-Wq 1000
Practice. Understand. Perform.
,PASSPOINT PRO NH SEPTIC SYSTEM INSTALLER - STUDY GUIDE
HOW TO USE THIS RESOURCE
This PassPoint Pro resource contains 150 original multiple-choice questions. Complete the question section first, then use the
detailed answer key and rationales at the end for review. Compare every field decision with the approved plan and current New
Hampshire requirements.
RULE BASIS RSA 485-A | Env-Wq 1000
CONDENSED STUDY GUIDE
1 Installer Permit & Scope
A New Hampshire installer must understand both the legal authority for the permit and the practical duty to build exactly what was
approved. Focus on RSA 485-A:29-36, permit eligibility, the $80 application/renewal framework, the biennial permit cycle, and the
department’s ability to use written and/or oral examination. Remember that the installer is responsible for work performed under the
installer permit number and must supervise that work.
2 Construction Approval Before Work
Do not treat a septic plan as an informal sketch. State law generally requires prior approval of plans and specifications before
construction of a building that will discharge sewage or before construction of the waste-disposal system. State requirements are
minimums, so local approvals can still apply.
3 Approved Plan = Final Plan
Env-Wq 1004 treats the approved plan as the final ISDS plan. Material changes such as changing the bed bottom, moving the bed more
than 10 feet, changing EDA type, or adding a pump to a gravity system can require new construction approval. The safest field habit is to
stop and resolve discrepancies before excavating or installing the changed component.
4 Inspection & Approval to Operate
The constructed ISDS cannot be covered or placed in operation before final inspection and approval. The building foundation/slab or
qualifying gravel pad must generally be in place before inspection. A partial inspection can be used in a limited site-constraint situation,
but approval to operate is withheld until the entire system is installed and inspected.
5 Sewer Lines
Know SDR 35 strength, the 18-inch water/sewer crossing separation, the SDR 26 sleeve exception extending 10 feet on each side,
long-run manhole/cleanout spacing, protection under wheel loads, and the 1% (about 1/8 inch per foot) slope from tank to distribution
box/EDA.
PassPoint Pro | New Hampshire Septic System Installer Page 2
,PASSPOINT PRO NH SEPTIC SYSTEM INSTALLER - STUDY GUIDE
6 Septic Tank Sizing
Up to four bedrooms generally require 1,250 gallons. Bedrooms five through twelve add 250 gallons each. Beyond that, formula-based
sizing applies. When tanks are installed in series, the first tank must contain at least two-thirds of total required capacity; ledge-tank
installations require twice the otherwise applicable total tank capacity.
7 Tank Installation Details
Tank bedding must be at least four inches of sand or crushed stone on a firm, uniform base. Backfill lifts cannot exceed 12 inches. Tanks
must be watertight, pipe connections must be watertight, the outlet sits 2-4 inches below the inlet, and access dimensions must support
future inspection and pumping.
8 Pumps & Alarms
Each sewage or effluent pump needs a visual and audible alarm in a centrally used area. The pump and alarm are on separate circuits.
Pump chambers are watertight, vented, accessible, and sized so each bed can be dosed at least three times per day.
9 Distribution Boxes
Use a distribution box for multiple beds, trenches, or pipes unless an approved serial or pressure distribution method is used. Outlet
bottoms must be at equal elevations. Incoming steep or pumped flow needs velocity reduction, and a box serving multiple EDAs must be
set on a concrete slab.
10 EDA Construction
Protect the infiltrative area from compaction, smearing, uncontrolled traffic, and storm runoff. Complete machine grading before installing
EDA components. Follow approved elevations and material thicknesses because the EDA’s treatment ability depends on the constructed
soil and distribution profile.
11 Trenches & Conduits
Effluent conduits must be SDR 35 equivalent or stronger. Supply piping from a distribution box is unperforated. Trench systems require
specified sand and stone layers; near large trees or dense shrubbery the stone depth beneath the leach pipe increases.
12 Pressure Distribution
Pressure distribution uses small-diameter perforated pipe supplied by a pump or siphon. The system is designed so discharge from each
hole is as equal as practical, with 75%-85% of network head lost as water exits through the perforations.
PassPoint Pro | New Hampshire Septic System Installer Page 3
, PASSPOINT PRO NH SEPTIC SYSTEM INSTALLER - STUDY GUIDE
13 Dry Wells & Raised EDAs
Dry wells have dedicated stone, spacing, unit, and abandonment requirements. Raised EDAs require careful site stripping and qualifying
clean fill. A retaining wall cannot substitute for the designed side slopes, and building elevation must allow gravity feed unless pumping is
part of the design.
14 Operation & Failure
Maintenance rules protect long-term system performance. Pump septic tanks when combined sludge/scum reaches one-third of tank
depth, maintain grease interceptors more aggressively, keep bulky/toxic waste out, and keep vehicles/livestock/heavy objects off the
EDA. Wet areas or disagreeable odors can signal possible failure.
15 Innovative/Alternative Technology
ITA systems can be provisional, general, or general with conditions. A provisional approval may allow up to 50 installations over up to five
years while performance data are gathered. Installers must follow any approved manufacturer manuals, O&M; provisions, and special
installation conditions.
PassPoint Pro | New Hampshire Septic System Installer Page 4
