1.1 CESSWI Scope of Practice, Eligibility, and Exam Structure

Credential and permit authority

CESSWI demonstrates inspection knowledge; it does not by itself confer a statutory right to sign, seal, enter a site, order work stopped, or practice engineering. Verify the applicable permit’s qualified-person training, employer appointment, written signatory authorization, contract, and jurisdictional licensing requirements. A CESSWI who also has another lawful professional qualification may act within that separately authorized role.

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Role and Scope of Practice of a CESSWI

The CESSWI program establishes a rigorous international benchmark for professionals who evaluate regulatory and plan compliance across active construction projects, industrial facilities, municipal storm sewer systems, and post-construction stormwater assets. Administered by EnviroCert International, Inc. (ECI), the credential verifies that an inspector possesses the technical knowledge and practical field judgment required to execute defensible, objective compliance inspections under federal, state, provincial, and local mandates.

Authorized Field Inspection Functions

Within the official CESSWI scope of practice, a certified inspector performs five primary operational functions:

1. Observing Site Conditions: Walking active construction perimeters, disturbed slopes, material staging areas, dewatering operations, structural Best Management Practices (BMPs), and discharge outfalls to verify whether field conditions match the approved Stormwater Pollution Prevention Plan (SWPPP) or Erosion and Sediment Control Plan (ESCP).
2. Measuring Installed Controls and Features: Verifying physical dimensions such as silt fence trench depth and post spacing, sediment basin storage depth and freeboard, riprap apron dimensions, vegetative ground cover density percentages, and slope gradients.
3. Sampling and Monitoring: Collecting representative stormwater grab samples, measuring field parameters (such as turbidity in Nephelometric Turbidity Units [NTU], pH, and temperature), verifying chain-of-custody documentation, and recording site rain gauge depths.
4. Photographing Evidence: Capturing clear, dated, time-stamped, and location-referenced photographs of site outfalls, BMP deficiencies, illicit discharges, and completed corrective actions.
5. Documenting and Communicating Compliance: Preparing factual, thorough, and legally defensible inspection reports, updating on-site Corrective Action Logs, and communicating observed deficiencies to permittees, operators, and regulatory authorities.

The Inspection vs. Engineering Design Boundary

A foundational concept tested heavily on the CESSWI examination is the strict boundary between compliance inspection and engineering design:

• What a CESSWI May Do: Identify that a perimeter sediment control or sediment trap is damaged, improperly installed, or overwhelmed by concentrated runoff; document the exact discrepancy between the approved plan drawing and field installation; record that a BMP has failed to prevent sediment discharge; and notify the permittee that a design review or corrective action is required.
• What a CESSWI May NOT Do: Calculate revised hydraulic routing to resize a sediment basin spillway, engineer a replacement retaining wall or diversion channel, modify approved SWPPP engineering calculations, or stamp/seal design drawings. When field conditions require structural redesign rather than routine maintenance or repair-to-spec, the CESSWI must escalate the issue to the project's CPESC, PE, or LA of record.

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Credential Tiers and Eligibility Pathways

EnviroCert International provides three distinct entry tracks into the CESSWI credential depending on an applicant's accumulated professional experience and existing certifications.

Progression from CESSWI-IT to Full CESSWI

Candidates who meet the 0.5-year (6-month) threshold apply for the CESSWI-IT tier, complete Part A, and sit for Part B Section 1 (General Principles). Upon passing, they hold the CESSWI-IT designation while accumulating additional supervised field inspection experience. Once a CESSWI-IT reaches the full 2.0-year qualifying experience threshold, they submit an upgrade application to sit for Part B Section 2 (Scope of Practice) and earn full CESSWI certification.

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Education Credit Rules and Worked Calculation

No college degree or high school diploma is required to apply for the CESSWI credential; an inspector with at least 2.0 years of documented qualifying field experience needs zero academic credit. However, applicants may substitute post-secondary education or professional licensure for a portion of the required experience.

The Non-Cumulative Rule

Education credit is strictly non-cumulative: credit is awarded only for the single highest level of education achieved (or professional license held). An applicant holding both an Associate degree and a Bachelor's degree cannot add the two credits together.

Worked Numeric Example: Calculating Candidate Eligibility

Scenario: An environmental compliance technician applies for CESSWI certification. Their background includes:

• An Associate of Applied Science (AAS) in Construction Management (a qualifying field);
• A Bachelor of Arts (BA) in History (a non-qualifying field);
• 15 months (1.25 years) of documented full-time field experience inspecting construction stormwater BMPs.

Step-by-Step Calculation:

1. Evaluate Education (Non-Cumulative): The candidate holds an AAS in a qualifying field (0.50 year) and a BA in a non-qualifying field (0.50 year, which is half of the 1.0-year Bachelor's credit). Because education credit is non-cumulative, the credits are not summed (0.50 + 0.50 is invalid). Applying the single highest degree level yields 0.50 year of education credit.
2. Add Documented Field Experience: 0.50 year (education) + 1.25 years (15 months field experience) = 1.75 years total credit.
3. Determine Credential Eligibility: Because 1.75 years ≥ 0.50 year but < 2.00 years, the candidate is immediately eligible for CESSWI-IT (Part A and Part B Section 1) and requires 0.25 year (3 additional months) of field experience to qualify for Full CESSWI (Part B Section 2).

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Application Requirements and Current Fee Schedule

All CESSWI applications are submitted through the online ECI Certification Portal. Every applicant must provide:

1. Employment and Education History: Detailed records of qualifying inspection duties and official academic transcripts (if claiming education credit).
2. Four (4) Professional References: References must verify the applicant's inspection experience and professional character. Special Municipal Rule: Municipal or government employees who do not work with external private clients may list 2 employer/supervisor references twice to satisfy the 4-reference portal requirement if external references are unavailable.
3. Ethics and Background Survey: Signed disclosure regarding any prior regulatory enforcement actions, felony convictions, or credential revocations, accompanied by a formal commitment to the ECI Code of Ethics.

September 2026 Program Fee Schedule & Legacy Webpage Comparison

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Exam Structure, Scoring, Calculator Policy, and SAOP Weights

Part A vs. Part B Examination Format

• Part A (US Federal Rules, Regulations, and Ordinances): An open-book, untimed take-home exam administered online through the ECI portal. It tests foundational US federal water quality and stormwater regulations (such as Clean Water Act Sections 401, 402, and 404, NPDES Phase I and II thresholds, and Construction General Permit rules). Part A is mandatory for all US CESSWI applicants unless they already hold a current, valid ECI professional certification (such as CPESC or CPSWQ). International candidates taking the metric CESSWI - SI Bundle are exempt from the US-specific Part A exam.
• Part B (General Principles & Scope of Practice): A closed-book, 180-minute (3-hour) exam available through Prometric, including remote proctoring, and approved in-person arrangements (available in US Customary or SI/Metric units). Part B is divided into two independently timed and independently scored 90-minute sections:
  • Part B Section 1 (Part 1 — General Principles): 90 minutes, 100 to 120 questions in the legacy November 6, 2015 examination memo testing core concepts from the CESSWI General Principles Review Manual.
  • Part B Section 2 (Part 2 — Scope of Practice): 90 minutes, 100 to 120 questions in the legacy November 6, 2015 examination memo testing applied field inspection skills using site plans, topographic maps, field photographs, BMP installation and failure diagnosis scenarios, and practical calculations.

Independent 70% Passing Standard & Confidentiality Policy PS6006 (December 2022 revision)

To pass Part B, a candidate must achieve a score of 70% or higher on Section 1 AND 70% or higher on Section 2 independently. A high score on Section 1 (for example, 90%) cannot offset a score below 70% on Section 2; if a candidate passes one section and fails the other, they should obtain ECI’s instructions about retesting and retention of a passed section before booking another attempt.

Under ECI Policy PS6006 (December 2022 revision), EnviroCert International strictly maintains the confidentiality of numerical examination scores. Candidates receive an official Pass/Fail determination (and domain diagnostic guidance when applicable), but ECI does not release raw or percentage numerical scores or item-level questions/answers.

Calculator and Equations Policy

Candidates are permitted to use a ECI-authorized calculator during Part B testing. Follow the specific appointment instructions. ECI prohibits calculator internet access, cameras, and audio/digital recording; do not assume an additional ban on every programmable model without the applicable provider instructions.

The 11 Specific Areas of Practice (SAOPs) and Part B Weights

The CESSWI Job Task Analysis (V1.1, May 16, 2024) organizes inspector competencies into 11 Specific Areas of Practice (SAOPs) with 41 numbered tasks; the blueprint consolidates some tasks into broader test objectives:

Official program sources and date

Checked October 13, 2026: CESSWI requirements and education table, ECI FAQ, September 2026 fees, and remote testing information. The current FAQ confirms two 90-minute CESSWI sections but does not give a current item count. The public table-of-contents PDF contains a November 2015 memo reporting 100–120 questions and a 70% passing standard for each section; treat its count as historical guidance and confirm current appointment details with ECI. The September schedule makes payments valid for one year; the FAQ states there is no time limit to take the exam after approval. These are separate policies.

The JTA lists 68 practice entries in six categories, including wet ponds in two categories (67 distinct practice names). This guide teaches those entries and additional useful variants; the list is not a claim that a fixed number of practices or questions will appear on an examination. CESSWI and CPESC are private certifications: neither replaces a professional license or creates a legal right to seal engineering plans.