1.3 Wastewater Certification: Grades I-V & OIT Requirements

Regulatory Framework: Title 23 CCR, Division 3, Chapter 26

The State Water Resources Control Board administers the Wastewater Operator Certification Program (WWOCP) under California Water Code sections 13625-13633 and Title 23, CCR, Division 3, Chapter 26. Day-to-day administration sits with the Office of Operator Certification within the Division of Financial Assistance - the same office that runs drinking water certification.

Wastewater certification uses Roman numerals (Grades I through V) while drinking water uses Arabic numerals (T1-T5, D1-D5). That is not cosmetic: the two programs use different education systems, different experience rules, different fee schedules, and different renewal rules. Do not carry a drinking water rule across to a wastewater question.

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Wastewater Treatment Plant Classification (23 CCR 3675)

[!WARNING] California does not classify wastewater treatment plants with a point-rating score. There is no "add up points for flow, effluent sensitivity, and process complexity" system in Title 23 - that is a Colorado/ABC-style approach that prep material sometimes imports by mistake. California uses a two-variable table: treatment process type crossed with design flow in MGD.

The Office of Operator Certification classifies a plant within 45 days of receiving the owner's reportable information:

Read the table by process first, then flow. A 3 MGD activated sludge plant is Class III (activated sludge, 5.0 or less). A 3 MGD primary-only plant is Class II (primary, greater than 1.0 through 5.0). A 3 MGD tertiary plant is Class IV (tertiary, greater than 1.0 through 10.0). Same flow, three different classes - the process controls.

Three qualifiers:

• Discretionary reclassification (3675(b)). A plant may be classified differently if it uses unconventional or innovative approaches because of flow conditions or unusual discharge requirements, if flow or receiving-water conditions demand unusually high operational control, or if it uses an approved process not listed in the table.
• Satellite plants (3675(c)). A satellite plant is not classified separately; it and the main plant are classified as a single wastewater treatment plant.
• Reclassification timing (3675(d)). After written notice of a change in reportable items, the Office has 45 days to reclassify or determine no reclassification is needed. If an SBR or extended-aeration plant is bumped up in class, the owner has 365 days to staff to the new grade requirements.

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Staffing: Chief Plant Operator and Designated Operator-in-Charge (23 CCR 3680)

California's wastewater term is designated operator-in-charge, not "shift supervisor." The chief plant operator appoints a certified operator as designated operator-in-charge for any period the chief plant operator cannot carry out the position's responsibilities.

Two further staffing rules from 3680(c):

• All operators must hold at least a valid Grade I certificate, a provisional operator certificate, or an operator-in-training certificate.
• At Class IV and Class V plants, at least 50 percent of the operators must hold operator or operator-in-training certificates at Grade II or higher.

Provisional Operators and Lone Operators

• A provisional operator (3680.2) may be used only at a Class I plant, only with written approval, only after the owner demonstrates due diligence in trying to hire a certified operator, and only with a $1,000 request fee plus the plant's waste discharge requirements, standard operating procedures, and a written plan.
• A lone operator (3681) requires written approval based on a plan showing the lone operator will perform only basic duties requiring minimal judgment and can communicate at all times with the chief plant operator or designated operator-in-charge. Approval is valid 180 days. Changes require 30 days' advance notice. An operator-in-training may never be assigned as a lone operator.

Educational Points (23 CCR 3685)

Educational points are the wastewater program's education currency. The conversions are counterintuitive, and this is one of the most reliably missed items on Grade I-III exams.

Wastewater treatment and science courses - 3685(a)

[!IMPORTANT] A 3-unit college course is worth eight educational points, not three. A single semester unit therefore prorates to about 2.67 points. A 36-hour approved training course is worth 3.6 points (36 hours / 10). Because a 3-unit course alone is worth 8 points, one college course plus one CEU already exceeds the 6 points a Grade I applicant needs.

Management courses - 3685(b)

At Grades III, IV, and V only, an operator may earn up to 16 educational points from management courses, and no more than 4 points in each type of management course. Management courses convert at half the rate of technical courses:

Applicants may not substitute experience for educational points (3685(c)).

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Education and Experience Requirements (23 CCR 3687)

Each grade offers multiple paths. Meet any one path in full.

Grade I

Grade II

Grade III

Grade IV

Grade V

[!TIP] Common misreading. The educational-point figures are path-specific, not grade-specific. Grade III is not "16 points" - it is 12 points on the Grade-II-operator path or 18 points on the general-experience path, and zero additional points on either degree path. Any question that offers a single point value for Grade II or Grade III without naming a path is testing whether you know the paths exist.

What Counts as Full Time and Qualifying Experience (23 CCR 3671)

Full time normally means averaging 40 hours per week performing qualifying duties, and in no case may an operator be considered full time while spending fewer than 1,800 hours per year on qualifying duties. Used paid vacation or sick leave earned from qualifying work may be counted. Two exceptions allow fewer than 40 hours per week: an operator or provisional operator solely responsible for the plant, and an operator-in-training who is the plant's only operator-in-training. Below full time, experience accrues on a prorated basis.

Qualifying Experience Credit (23 CCR 3684)

An applicant with at least one year of full-time qualifying experience may receive additional credit:

1. One-time one-year credit for 3,600+ hours operating a water treatment plant while holding a valid water treatment operator certificate, where 3,600+ of those hours involved two or more of coagulation, sedimentation, aeration, filtration, oxidation, and disinfection.
2. One-time one-year credit for 3,600+ hours developing O&M, safety, or laboratory manuals; conducting operations, safety, or laboratory training; developing and evaluating process control strategies; or performing physical, chemical, and biological processes comparable to operator duties.
3. An irrevocable election to substitute 16 educational points for one year of full-time qualifying experience credit. Points spent this way cannot also be used to satisfy the education column of the 3687 table.

Out-of-state, territorial, and tribal experience counts if the duties were comparable and the applicant held a comparable valid certificate at the time; evaluation is based on actual work performed, without respect to job title.

Operator-in-Training (OIT) Credentialing

An owner may employ or train an operator-in-training at any grade level, provided the OIT is under the direct supervision of an operator at the same or higher grade level and is performing duties at the grade level for which the OIT is certified (23 CCR 3682).

OIT Rules That Get Tested

1. Term. OIT certificates are valid for three years (3682.2(d)). For Grades II through V, the OIT certificate expiration may not exceed the expiration of the applicant's passed examination results.
2. Renewal. An OIT certificate may be renewed once for another three-year period if the OIT has passed an exam at that grade level or higher and those results have not expired. After the first renewal, it may be renewed repeatedly for additional three-year periods if the chief plant operator submits a written plan for the OIT to acquire the qualifying experience needed for full certification, with the chief plant operator's original signature verifying experience and duties.
3. Issuance. The certificate is issued in the applicant's name but mailed to the chief plant operator at the plant where the OIT will train, and it names that plant on its face.
4. Prohibited roles. An OIT may not be the chief plant operator, may not be the designated operator-in-charge (3680(a) requires an operator certificate at a grade level), and may never be assigned as a lone operator (3681(g)).

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The Statutory Exam Blueprint (23 CCR 3701)

Unlike the drinking water program, which publishes an Expected Range of Knowledge document, the wastewater exam content is written directly into the regulation. Section 3701(b) requires that each grade test knowledge of wastewater treatment plant operation and include mathematical problems related to process control and evaluation, with each higher grade requiring more detailed knowledge. Section 3701(c) is cumulative - each grade includes everything below it.

[!NOTE] Grade V adds no new subject matter. It re-tests the Grade IV blueprint at greater difficulty. If a Grade V question seems to introduce an unfamiliar topic, re-read it - the topic is in the Grade I-IV list, applied to a harder scenario.

Exam Logistics

• A minimum of two examinations are given each year, with a final filing date 60 days before the scheduled examination (3701(a)). Wastewater exams are delivered through Prometric computer-based testing, but the 60-day filing period still applies - the earliest you can test is 60 days after the Board receives your application.
• Applications must include a high school diploma or equivalent, transcripts, report cards, course completion certificates, and any engineering registrations, plus the application and examination fees.
• Examination security (3701.1): government photo ID is required; dishonest conduct means confiscated materials, an ungraded exam, denial of the next scheduled exam, administrative civil liability, and disciplinary action. Copying or revealing exam questions can bar certification.
• Results (3701.2): written notice within 90 days; passing results are valid for four years from the date on the notice.
• Examination waiver (3689): the Office shall waive the exam and exam fee for a holder of a valid, unexpired comparable certificate from another certifying body when the certifying body's education, experience, and examination requirements are comparable, the applicant meets the 3687 requirements, and a comparable written exam was passed. A $100 examination waiver fee applies in addition to the certification fee.

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Wastewater Fees and Renewal (23 CCR 3717, 3702.2)

Operators holding two or more State Water Board certificates (water treatment, distribution, or wastewater) pay reduced fees per certificate: certification $95 / $125 / $170 / $190 / $190 by grade, and a $110 triennial renewal per certificate. Other fees: provisional operator certification $125, reinstatement $100 for all grades, replacement certificate $50, examination waiver $100. Except for examination fees refundable under 3700(e), all fees are nonrefundable.

Renewal (3702.2): wastewater operator certificates may be renewed repeatedly for three-year periods. The Office sends an expiration notice at least 60 days ahead, but failure to receive it does not excuse a late renewal. The renewal application needs name, address, grade, certificate number, title, employment information, and the fee - Title 23 imposes no continuing education requirement for wastewater renewal, a genuine difference from the drinking water program. A deficiency not corrected before expiration means no renewal certificate; the operator must pay the reinstatement fee and meet section 3702.4. The Office may refuse renewal if the applicant operated with an expired certificate or at a grade level for which they were not certified.