HAZWOPER Exam Guide: OSHA 29 CFR 1910.120 Training, Refresher and Test
Reviewed by Gary B. Xavier, HVACR Instructor & Author, EPA 608 Universal ·
The HAZWOPER exam is the end-of-course test for OSHA hazardous waste operations and emergency response training under 29 CFR 1910.120. This guide covers who needs the training, the 40-hour and 24-hour rules, the 8-hour refresher, emergency response levels, medical exams, what the test costs, the pass score and a study plan, all checked against the eCFR text.
What Is OSHA HAZWOPER Under 29 CFR 1910.120?
HAZWOPER stands for Hazardous Waste Operations and Emergency Response. The rule is 29 CFR 1910.120, and it covers five kinds of work unless the employer can show there is no reasonable possibility of exposure:
- Clean-up operations required by a government body at uncontrolled hazardous waste sites, including EPA National Priority List sites.
- Corrective actions involving clean-up at sites covered by RCRA.
- Voluntary clean-ups at sites a government body recognizes as uncontrolled hazardous waste sites.
- Hazardous waste work at treatment, storage and disposal (TSD) facilities.
- Emergency response to releases, or substantial threats of releases, of hazardous substances, wherever they happen.
Clean-up sites follow every paragraph except (p) and (q). TSD facilities follow paragraph (p). Emergency response outside those settings follows paragraph (q). Knowing which paragraph applies to which worker is one of the most tested ideas.
HAZWOPER Training Hours Under 1910.120(e)
Paragraph (e) sets minimum hours before anyone works on a site:
| Worker type | Off-site instruction | Supervised field experience |
|---|---|---|
| General site workers | 40 hours | 3 days |
| Occasional or low-exposure workers | 24 hours | 1 day |
| Supervisors and managers | 40 hours, plus 8 hours specialized | 3 days |
| TSD facility workers (paragraph (p)) | 24 hours initial | — |
A 24-hour worker who later becomes a general site worker must take another 16 hours and 2 more days of field experience. That adds up to the same 40 hours and 3 days.
HAZWOPER 8-Hour Annual Refresher
Site workers, supervisors and TSD workers all need 8 hours of refresher training every year. Emergency responders under paragraph (q) need annual refresher training too, or they must show competency each year. Many people test more often on refresher material than on the initial course, so learn these intervals cold.
HAZWOPER Certificate Rules
OSHA requires written certification. The instructor or head instructor and the trained supervisor certify each worker who completes the training. Each certified person gets a written certificate. Anyone who has not been so certified, and does not qualify under the equivalent-training rule in (e)(9), is prohibited from engaging in hazardous waste operations.
Equivalent Training and Site-Specific Training
Under (e)(9), an employer who can document that a worker's experience or training equals the required initial training does not have to repeat it, and must give the worker a copy of that documentation on request. Even so, certified workers new to a site must get site-specific training before they enter.
What Appendix E Suggests for a HAZWOPER Course Certificate
Appendix E to 1910.120 is non-mandatory training guidance. It suggests that the course certificate list the training provider's name and address, an individual identification number, and the PPE levels the student used during the course. It also suggests a wallet-sized laminated card with the student's photo, and that providers keep course records for at least five years.
HAZWOPER Exam Cost, Number of Questions and Pass Score
Here is the honest answer: OSHA does not set any of these. 29 CFR 1910.120 sets training hours and topics, not an exam fee, a question count, a time limit or a pass score. Each training provider sets its own course price, test length, retake rule and pass mark. Ask your provider before you sign up. Our HAZWOPER Full Mock Exam uses 70% only as an unofficial target.
Is the HAZWOPER Test Open Book? Retakes and Difficulty
OSHA does not say whether the HAZWOPER test is open book or how retakes work. Those rules come from your provider. In terms of difficulty, the content is not deep, but it is wide. The test can jump from site control zones to drum handling, decontamination, PPE levels and medical exams. People who struggle usually mix up the numbers: 40 vs 24 hours, 3 days vs 1, 8-hour refresher, and the 30-day medical trigger.
HAZWOPER Emergency Response Levels Under 1910.120(q)
Paragraph (q) sets five training levels for emergency responders:
| Level | Role | Minimum training |
|---|---|---|
| First responder awareness | Discovers a release and notifies authorities | Demonstrated competency |
| First responder operations | Responds defensively without trying to stop the release | At least 8 hours |
| Hazardous materials technician | Approaches the point of release to stop it | At least 24 hours |
| Hazardous materials specialist | Supports technicians with specific knowledge | At least 24 hours at technician level |
| On-scene incident commander | Takes control of the incident scene | At least 24 hours at operations level |
HAZWOPER Medical Surveillance Under 1910.120(f)
Medical surveillance applies to workers exposed at or above permissible exposure limits for 30 days or more a year, workers who wear a respirator for 30 days or more a year, and members of HAZMAT teams. Exams happen before assignment, at least every 12 months, at termination, and after exposure symptoms. A physician may allow longer intervals, but not more than every two years. Respirator rules come from 29 CFR 1910.134.
Other 1910.120 Topics on the HAZWOPER Test
- Safety and health program (b): the written program, organizational structure, site-specific plan and pre-entry briefing.
- Site characterization (c): preliminary evaluation, IDLH conditions and air monitoring on entry.
- Site control (d): site maps, work zones, the buddy system and communications.
- PPE (g): engineering controls first, then PPE selected for the hazards, with Level A to D ensembles.
- Monitoring (h): initial and periodic air monitoring.
- Drums and containers (j): inspection, labeling, moving and opening drums.
- Decontamination (k): written procedures before entry.
- Illumination (m): minimums of 5, 3, 10 and 30 foot-candles by work area.
- Sanitation (n): potable water, toilets and washing facilities.
HAZWOPER State Differences
HAZWOPER is a federal OSHA rule. States that run their own OSHA-approved State Plans must have standards at least as effective as the federal rule, and some add their own wording or requirements. Public-sector workers may also be covered by a State Plan rather than federal OSHA. If you work in a State Plan state, check your state's version. For broader OSHA prep, see our OSHA General Industry Practice Test and Confined Space Entry Guide.
HAZWOPER Exam Tips for Test Day
Read each question for the worker type first. A question about a TSD worker points to paragraph (p), a question about a spill responder points to (q), and a question about a clean-up site points to (e). Many wrong answers are real HAZWOPER numbers taken from the wrong paragraph, such as giving a TSD worker the 40-hour rule. Next, watch for the words "at least" and "not more than." OSHA sets minimum training hours and maximum medical-exam intervals, and answer choices often flip them. Finally, if your provider allows notes, bring a one-page sheet of hours, intervals and foot-candle levels. If it does not, write that sheet from memory every day in the week before the test.
HAZWOPER Study Plan
- Days 1–2: read 1910.120(a) and (e). Learn the scope, the 40/24-hour rules, supervisor hours and the refresher.
- Days 3–4: study (b), (c), (d) and (g): the program, site characterization, site control and PPE.
- Days 5–6: cover (f), (h), (j), (k) and (m): medical, monitoring, drums, decon and illumination.
- Day 7: study (p) and (q), then take the HAZWOPER Practice Test and the timed mock. Retest any group under 80%.
Make a one-page sheet of every number in the rule: hours, days, intervals and foot-candles. Most missed questions come from those numbers.
Frequently Asked Questions
How many hours is HAZWOPER training?
Under OSHA 29 CFR 1910.120(e), general site workers need at least 40 hours of off-site instruction and 3 days of supervised field experience. Workers on site only occasionally, or in low-exposure areas, need 24 hours and 1 day. Supervisors add 8 hours of specialized training.
How often is HAZWOPER refresher training required?
OSHA requires 8 hours of refresher training every year for site workers, supervisors and TSD workers.
How much does the HAZWOPER exam cost?
OSHA does not set an exam fee. Your training provider sets the course price, and the end-of-course test is part of the course.
What score do I need to pass the HAZWOPER exam?
OSHA 1910.120 sets no pass score. Each training provider sets its own. Our mock uses 70% only as an unofficial practice target.
How many questions are on the HAZWOPER test?
OSHA does not set a question count. It varies by training provider.
Is the HAZWOPER test open book?
OSHA does not say. Ask your training provider, since each one sets its own test rules.
Can I retake the HAZWOPER test?
OSHA sets no retake rule. Retakes are set by your training provider.
Who issues the HAZWOPER certificate?
Workers and supervisors who complete the training are certified in writing by their instructor or head instructor and trained supervisor. Anyone not so certified, and not qualified through equivalent training, is prohibited from engaging in hazardous waste operations.
What are the HAZWOPER emergency response levels?
Paragraph (q) lists five levels: first responder awareness, first responder operations (at least 8 hours), hazardous materials technician (at least 24 hours), hazardous materials specialist (at least 24 hours at technician level), and on-scene incident commander (at least 24 hours at operations level).
Is there a free HAZWOPER practice test?
Yes. Our 181-question practice test quotes 29 CFR 1910.120 for every answer, and a timed mock exam follows.
TradeExamHub is independent and not affiliated with OSHA or any training provider. Our questions quote eCFR text and do not come from any actual exam.