How many questions are on the CSP exam, and how long is it?

The CSP exam has 200 multiple-choice items and a time limit of 5.5 hours. Each item has four possible answers and only one correct answer.

What score do I need to pass the CSP?

BCSP does not state a numeric passing score in its current Complete Guide. It sets minimum passing scores with criterion-referenced methods (Modified Angoff and Bookmark). There is no penalty for a wrong answer; only correct answers count toward the passing score.

What are the CSP11 domains and their weights?

Advanced Application of Safety Principles 25%, Program Management 25%, Risk Management 15%, Emergency Management 9%, Environmental Management 6%, Occupational Health and Applied Science 10%, and Training 10%.

Who is eligible to sit the CSP?

You need a bachelor's degree or higher from an accredited institution, four years of SH&E experience with at least half of it preventative, professional-level work, and a BCSP-approved credential such as the ASP, GSP, TSP or CIH.

How much does the CSP cost, and can I retake it?

The application fee is $160 and the exam is $350; an optional $600 bundle adds a self-assessment and a second attempt. After an unsuccessful attempt you may retest no earlier than six weeks later, any number of times while eligible.

How is this book organized?

Seven chapters follow the seven CSP11 domains, each closing with a quiz, followed by a 200-question practice exam weighted to the blueprint. The book contains 318 questions in total, each with a worked explanation, and costs $19.99.

Do I need the ASP before the CSP?

Not necessarily the ASP, but you must hold one BCSP-qualified credential when you apply. The ASP is one option; others include the GSP, TSP and CIH.

Is a study guide enough for the CSP — Certified Safety Professional exam, or do I need a course?

Check eligibility first — per Board of Certified Safety Professionals (BCSP): bachelor's degree or higher in any field from an accredited institution; four years of SH&E experience, at least 50% of it preventative, professional-level work with breadth and depth of safety duties; and a BCSP-approved qualifying credential (for example ASP, GSP, TSP or CIH). A book does not replace those requirements. For the exam content itself, this 206-page guide teaches the material chapter by chapter with 318 practice questions and explanations inside. A prep course adds live instruction and a set schedule; whether you need one beyond any required education is your call.

Does the CSP — Certified Safety Professional study guide come as a PDF?

Yes — CSP Study Guide — 2026 Edition downloads as PDF and EPUB, 206 pages. The download link is emailed the moment payment clears and does not expire.

How much does the CSP — Certified Safety Professional study guide cost?

$19.99, once. There is no subscription and no account to create; the PDF and EPUB files are yours to keep.

Can I read part of the CSP — Certified Safety Professional study guide before buying?

Yes. A full chapter is free to read on this page — not a summary of one, the chapter itself.

Is this the official CSP — Certified Safety Professional study guide?

No. This is an independent study guide and is not affiliated with or endorsed by the exam's awarding body. It is written from BCSP's published CSP examination blueprint and candidate handbook. Always confirm current requirements with the body that issues your licence.

CSP — Certified Safety Professional · 2026 Edition

CSP Study Guide — 2026 Edition

Every domain of the CSP examination blueprint, 318 original questions with worked explanations, and a 200-question full-length practice exam.

318 original practice questions, each with a worked explanation, in one PDF + EPUB you keep

PDF + EPUB · English · 206 pages · $19.99 one-time

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Look inside the book

Three real pages, rendered straight from the PDF you download — a reference page, a teaching page, and a worked question, always in that order. Nothing here was redrawn to look better.

Quick reference
Chapter 1 — Advanced Application of Safety Principles · PDF page 17
A page you can turn back to: the numbers, deadlines or terms gathered in one place.
How it's taught
Chapter 1 — Advanced Application of Safety Principles · PDF page 10
An explanation page: the material taught in prose, in the order the exam tests it.
A question, worked
Chapter 2 Quiz — Program Management (25 questions) · PDF page 45
A practice question with its answer and the reasoning behind it — not just a key.

About the CSP exam

Safety, health and environmental professionals who hold a qualifying credential such as the ASP and are preparing for the CSP. This book teaches the seven CSP11 blueprint domains, with chapter quizzes and a full-length practice exam built from BCSP and federal primary sources. It is an independent study guide, not affiliated with BCSP, and includes no online practice.

Outline changes: Compared with CSP10, Advanced Application of Safety Principles and Program Management gained weight and now make up 50% of the exam, while the other five domains saw small decreases.

Certified Safety Professional — exam facts
Awarding body	Board of Certified Safety Professionals (BCSP)
Questions	200 multiple-choice items, each with four possible answers and one correct answer
Time limit	5.5 hours
Passing rule	BCSP uses criterion-referenced procedures (the Modified Angoff and the Bookmark Standard Setting Methods) to establish minimum passing scores; no numeric passing score is stated in the current Complete Guide. There is no penalty for selecting an incorrect answer; only correct answers count toward reaching the passing score.
Fees	Application $160; individual exam $350; optional exam bundle $600 (exam authorization, online self-assessment, and a second attempt if the first is unsuccessful); eligibility extension $100; renewal $180
Delivery	Computer-based, delivered via computer at a Pearson test center; closed book; on-screen calculator emulating the TI-30XS
Eligibility	Bachelor's degree or higher in any field from an accredited institution; four years of SH&E experience, at least 50% of it preventative, professional-level work with breadth and depth of safety duties; and a BCSP-approved qualifying credential (for example ASP, GSP, TSP or CIH)
Retakes	No earlier than six weeks after the last attempt; the exam may be purchased and taken any number of times while eligible
Content outline	CSP11 Examination Blueprint, V.2024.04.24 — effective August 1, 2025
Domains and weights	Advanced Application of Safety Principles — 25% Program Management — 25% Risk Management — 15% Emergency Management — 9% Environmental Management — 6% Occupational Health and Applied Science — 10% Training — 10%

Questions buyers ask

How many questions are on the CSP exam, and how long is it?: The CSP exam has 200 multiple-choice items and a time limit of 5.5 hours. Each item has four possible answers and only one correct answer.
What score do I need to pass the CSP?: BCSP does not state a numeric passing score in its current Complete Guide. It sets minimum passing scores with criterion-referenced methods (Modified Angoff and Bookmark). There is no penalty for a wrong answer; only correct answers count toward the passing score.
What are the CSP11 domains and their weights?: Advanced Application of Safety Principles 25%, Program Management 25%, Risk Management 15%, Emergency Management 9%, Environmental Management 6%, Occupational Health and Applied Science 10%, and Training 10%.
Which CSP blueprint is current, and what changed?: The CSP11 blueprint (V.2024.04.24) took effect on August 1, 2025. Compared with CSP10, Advanced Application of Safety Principles and Program Management increased and now represent 50% of the exam, while the other five domains saw small decreases.
Who is eligible to sit the CSP?: You need a bachelor's degree or higher from an accredited institution, four years of SH&E experience with at least half of it preventative, professional-level work, and a BCSP-approved credential such as the ASP, GSP, TSP or CIH.
How much does the CSP cost, and can I retake it?: The application fee is $160 and the exam is $350; an optional $600 bundle adds a self-assessment and a second attempt. After an unsuccessful attempt you may retest no earlier than six weeks later, any number of times while eligible.
How is this book organized?: Seven chapters follow the seven CSP11 domains, each closing with a quiz, followed by a 200-question practice exam weighted to the blueprint. The book contains 318 questions in total, each with a worked explanation, and costs $19.99.
Do I need the ASP before the CSP?: Not necessarily the ASP, but you must hold one BCSP-qualified credential when you apply. The ASP is one option; others include the GSP, TSP and CIH.
Is a study guide enough for the CSP — Certified Safety Professional exam, or do I need a course?: Check eligibility first — per Board of Certified Safety Professionals (BCSP): bachelor's degree or higher in any field from an accredited institution; four years of SH&E experience, at least 50% of it preventative, professional-level work with breadth and depth of safety duties; and a BCSP-approved qualifying credential (for example ASP, GSP, TSP or CIH). A book does not replace those requirements. For the exam content itself, this 206-page guide teaches the material chapter by chapter with 318 practice questions and explanations inside. A prep course adds live instruction and a set schedule; whether you need one beyond any required education is your call.
Does the CSP — Certified Safety Professional study guide come as a PDF?: Yes — CSP Study Guide — 2026 Edition downloads as PDF and EPUB, 206 pages. The download link is emailed the moment payment clears and does not expire.
How much does the CSP — Certified Safety Professional study guide cost?: $19.99, once. There is no subscription and no account to create; the PDF and EPUB files are yours to keep.
Can I read part of the CSP — Certified Safety Professional study guide before buying?: Yes. A full chapter is free to read on this page — not a summary of one, the chapter itself.
Is this the official CSP — Certified Safety Professional study guide?: No. This is an independent study guide and is not affiliated with or endorsed by the exam's awarding body. It is written from BCSP's published CSP examination blueprint and candidate handbook. Always confirm current requirements with the body that issues your licence.

What's included — and what isn't

Included

Every domain of BCSP's CSP examination blueprint
A quiz closing each chapter, with worked explanations
A 200-question full-length practice exam at the published weights
318 original questions, each explained and cited to its source
OSHA requirements cited to 29 CFR by section
PDF + EPUB you keep

Not included

No printed copy is shipped — this is a file you download and can print yourself
No video course, instructor, tutoring or online question bank comes with the book — everything is in the file
Not your exam registration or the testing centre's fee, which you still pay to the official body

See 17 sections and the page each one starts on

Chapter 1 — Advanced Application of Safety Principlesp. 6
Chapter 1 Quiz — Advanced Application of Safety Principles (25 questions)p. 19
Chapter 2 — Program Managementp. 29
Chapter 2 Quiz — Program Management (25 questions)p. 39
Chapter 3 — Risk Managementp. 51
Chapter 3 Quiz — Risk Management (18 questions)p. 58
Chapter 4 — Emergency Managementp. 64
Chapter 4 Quiz — Emergency Management (12 questions)p. 72
Chapter 5 — Environmental Managementp. 77
Chapter 5 Quiz — Environmental Management (10 questions)p. 83
Answer Key — Chapter 5 Quizp. 86
Chapter 6 — Occupational Health and Applied Sciencep. 87
Chapter 7 — Trainingp. 102
Chapter 7 Quiz — Training (14 questions)p. 108
Answer Key — Practice Exam Domain 1p. 126
Appendix A — Key Termsp. 193
Appendix B — Formula and Quick-Reference Sheetp. 197

Taken from the PDF you download, with the page each one starts on — not typed here.

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One complete chapter, exactly as it ships in the eBook. Scroll the window to read it right here; no download, no email.

Read chapter 6 here, without leaving the page

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Chapter 6 · ≈9 min read

Occupational Health and Applied Science

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Domain 6 carries 10% of the CSP exam, and it is the most numbers-driven domain: exposure limits, exchange rates, dose calculations, unit conversions, lifting math, containment volumes, and energy computations. The exam tests this domain as applied science — nearly every question is a scenario: pick the right limit, run the right calculation, choose the control the numbers point to. Every topic below follows the same spine: concept, why it matters, how it is tested, and the trap.

1. Anticipate, Recognize, Evaluate, and Control Exposures

The concept. Industrial hygiene is the anticipate–recognize–evaluate–control cycle applied to health hazards: chemicals, radiation, noise, biohazards, heat and cold, indoor air quality, ventilation, nanoparticles, combustible dust, silica, hot work, and lasers. Anticipation starts before exposure exists — SDSs, process chemistry, planned tasks. Recognition finds the hazard in the workplace. Evaluation measures it against exposure limits. Control follows the hierarchy from the top down: "The hierarchy of controls should be followed from top to bottom"^[1] — elimination and substitution first, engineering next, administrative after that, PPE last.

Exposure limits: TWA, STEL, ceiling. The time-weighted average is "the average exposure to a contaminant over a given period of time, typically 8-hours"^[2]. The short-term exposure limit is "the average exposure to a contaminant to which a worker may be exposed during a short time period (typically 15 – 30 minutes)"^[3]. The ceiling is "the exposure limit a worker's exposure may never exceed"^[4]. Work the TWA: 50 ppm × 6 h + 110 ppm × 2 h → (300 + 220) / 8 = 65 ppm — compliant against a 75 ppm PEL-TWA, but a logged 130 ppm spike still violates a 100 ppm ceiling. The limit type dictates sampling: full-shift personal breathing-zone samples for TWAs (area samples characterize a room, not a worker's exposure), 15-minute samples for STELs, instantaneous readings for ceilings. Sample the highest-exposure workers and tasks first, and calibrate pumps before and after.

How it is tested. Which sampling approach answers the compliance question — a welder moving between three stations needs personal breathing-zone sampling across the shift, not one fixed area monitor. A 15-minute task sample is judged against the STEL, never folded into the 8-hour TWA.

The trap. Averaging away a ceiling excursion ("the TWA was fine") — a ceiling is never exceeded, full stop.

Ventilation: dilution vs. local exhaust. Dilution (general exhaust) lowers concentrations by mixing large volumes of fresh air through a space; it suits low-toxicity, widely dispersed contaminants. Local exhaust ventilation "is designed to capture an emitted contaminant at or near its source, before the contaminant has a chance to disperse into the workplace air"^[5]; a typical system has five parts — fans, hoods, ducts, air cleaners, and stacks^[6]. Sizing math is Q = V × A: a 2 ft² duct at 1,500 fpm delivers 3,000 cfm. If the hood design needs 3,000 cfm the system is adequate; if the process needs 4,000 cfm it is undersized.

How it is tested. Selection — a high-toxicity solvent at an open degreasing tank calls for LEV capture at the source, because dilution lets vapor cross the breathing zone and demands enormous air volumes — and Q = V × A verification math.

The trap. Specifying dilution for highly toxic point sources, and assuming installed ventilation is adequate without checking flow numbers.

Noise: the exam's favorite distinction. Federal OSHA (29 CFR 1910.95): the PEL is 90 dBA as an 8-hour TWA^[7]. The action level is 85 dBA (8-hour TWA), equivalently a 50% dose — at or above it the employer must run a continuing, effective hearing conservation program^[8]. OSHA uses a 5-dB exchange rate: "the allowable exposure time is halved for each 5 dB of increased exposure — thus 95 dB(A) is allowed for four hours, 100 dB(A) for two hours"^[9]. Impulsive or impact noise "should not exceed 140 dB peak sound pressure level"^[10]. Alongside sits the NIOSH recommendation: 85 dB(A) as an 8-hour TWA^[11] with a 3-dB exchange rate — "for every 3-dB increase in noise level, the allowable exposure time is reduced by half"^[12]. Work the OSHA dose: allowable time T = 8 / 2^((L − 90)/5). A press operator at 100 dBA for 1.5 h (T = 2 h) plus 90 dBA for 5 h (T = 8 h) accumulates 100 × (1.5/2 + 5/8) = 137.5% — over the PEL, requiring engineering or administrative controls.

How it is tested. What a number requires: 88 dBA (5-dB exchange) is below the 90 PEL but at/above the 85 action level — no federal PEL violation, but a hearing conservation program is mandatory. Plus exchange-rate math and the 140 dB peak cap.

The trap. Using NIOSH's 3-dB exchange to judge federal OSHA compliance; confusing 85 (program required) with 90 (violation); forgetting jurisdiction — these are federal figures, and OSHA-approved state plans must be at least as effective and may be stricter^[13].

Heat and cold stress. NIOSH sets Recommended Alert Limits (RALs) for unacclimatized workers and Recommended Exposure Limits (RELs) for acclimatized workers^[14] — the new crew gets the lower limit. Acclimatization is scheduled: "For new workers, the schedule should be no more than a 20% exposure on day 1 and an increase of no more than 20% on each additional day"^[15]; experienced workers follow 50% / 60% / 80% / 100% over days 1–4^[16]. Layer on water, rest, shade, work-rest cycling, and buddy systems. Cold stress gets the same structured treatment — layered dry clothing, warming shelters, scheduled warming breaks — because both are foreseeable and preventable.

How it is tested. A new hire on day 2 is capped at 40%; an unacclimatized crew is judged against the RAL, not the REL.

The trap. Full duty on day 1, and applying the acclimatized REL to an unacclimatized crew.

Radiation. OSHA's 1910.1096 covers ionizing radiation — "alpha rays, beta rays, gamma rays, X-rays, neutrons, high-speed electrons, high-speed protons, and other atomic particles" — and explicitly excludes "sound or radio waves, or visible light, or infrared or ultraviolet light"^[17]: UV burns eyes and skin but is not ionizing. Absorbed dose uses gray and rad — "one gray is equal to an absorbed dose of 1 Joule/kilogram (100 rads)"^[18]; "one rad is equal to ... 0.01 gray"^[19] — while dose equivalent (biological effect) uses rem and sievert. The NRC adult occupational annual limit is a total effective dose equivalent of "5 rems (0.05 Sv)"^[20]. Convert: 0.25 Gy = 25 rad. Control with time, distance, and shielding.

How it is tested. Unit conversions, and limit application: a technician at 4.3 rem year-to-date cannot take work adding 0.9 rem.

The trap. Confusing absorbed dose (rad/gray) with dose equivalent (rem/sievert), and treating UV as ionizing radiation.

Silica, combustible dust, lasers, IAQ, nanoparticles, biohazards. Respirable crystalline silica from cutting or grinding concrete and masonry causes silicosis — control with wet methods plus LEV at the tool; dry sweeping is the classic wrong answer because it re-suspends the dust. Combustible dust explodes only when five conditions coincide — fuel, oxygen, ignition source, dispersion, confinement — so attack each leg: housekeeping without compressed-air blowdown, dust collection with explosion protection, bonding and grounding, ignition-source control. Lasers are an eye hazard: controlled posted area, beam enclosures, eyewear selected for wavelength and power — ordinary sunglasses are never the answer. Investigate IAQ complaints at the source (contaminant sources, ventilation, filtration, moisture), using dilution ventilation for low-toxicity general contaminants. Nanoparticles carry high surface area per unit mass with few established limits — default to enclosure and LEV. For biological hazards, routes of exposure (inhalation, ingestion, skin contact, injection) drive control choice through exposure control plans, standard precautions, and hygiene.

How it is tested. Control-selection scenarios — the right answer captures or eliminates the hazard at the source; dry sweeping near silica, blowdown in a dusty elevator, and sunglasses for laser alignment are the signature wrong answers.

2. Public Health Fundamentals

The concept. Public health gives the safety professional tools to read populations: epidemiology (how disease and injury distribute), infectious disease (how infections move), risk factors (what raises the odds), and statistics (how to interpret data). Incidence counts new cases arising over a period; prevalence counts all existing cases at a point in time — rising incidence means new cases are occurring, while high prevalence with flat incidence means cases are accumulating. Outbreak investigation runs a disciplined sequence: verify the diagnosis, set a case definition, describe cases by time, place, and person, test hypotheses about the source, and implement controls. Cohort studies follow exposed and unexposed groups forward to compare outcome rates; case-control studies start from the outcome and look backward at exposures.

Infectious disease. Infection travels a chain — agent, reservoir, portal of exit, transmission, portal of entry, susceptible host — and breaking any single link stops it. Excluding ill food handlers and enforcing hand hygiene breaks the chain for norovirus; the exam rewards the answer that names the link broken.

Statistics the exam uses. The mean is "that value that is most commonly referred to as the average"^[21] — and one extreme sample pulls it, so skewed exposure data misleads if read alone. The standard deviation "restores the units of the spread to the original data units (the variance squares the units)"^[22]. For approximately normal data, "within plus and minus three standard deviations, 99.7 percent" of values fall^[23] — a result beyond ±3σ gets investigated, not accepted. Incidence rates use the standard base: "the 200,000 figure in the formula represents the number of hours 100 employees working 40 hours per week, 50 weeks per year would work"^[24]. Work it: 6 recordables over 480,000 hours → (6 × 200,000) / 480,000 = 2.5. The DART rate counts the severity subset: "(Number of entries in column H + Number of entries in column I) X 200,000 ÷ Number of hours worked by all employees = DART incidence rate"^[25].

How it is tested. Rate calculations, interpreting a ±3σ outlier on a control chart, and incidence-vs-prevalence distinctions.

The trap. The wrong numerator — all recordables vs. the DART subset — and treating a beyond-±3σ result as normal variation.

3. Toxicology

The concept. Dose–response rules toxicology: the LD50 is the single dose lethal to 50% of test animals (mg/kg); the LC50 is the airborne concentration lethal to 50% over a stated time (ppm or mg/m³). The relationship is inverse — lower LD50/LC50 means greater acute toxicity. Routes of exposure decide how the dose enters: inhalation for gases, vapors, and respirable dusts; dermal absorption for solvents and pesticides; ingestion via hand-to-mouth; injection via sharps. Absorbed chemicals ride the bloodstream, are metabolized (often by the liver), and excreted — each step able to concentrate harm at a target organ. Acute effects follow high exposures quickly; chronic effects accumulate from repeated lower exposures, sometimes with long latency.

Special toxic effects. Mutagens damage genetic material. Carcinogens cause or promote cancer. Teratogens harm fetal development — a pregnant worker's assignment involving a labeled teratogen is reassigned or the chemical substituted, never "managed" with gloves. Ototoxins damage hearing and synergize with noise: toluene or styrene plus high noise produces more hearing loss than either alone, so 89 dBA with toluene exposure carries more risk than the noise number suggests.

Exposure control plans. Start with the SDS: 16 sections in fixed order, with toxicology in Section 11 (where LD50/LC50 data live), exposure controls in Section 8, first aid in Section 4, and handling/storage in Section 7^[26]. Then apply the hierarchy from the top down^[1]: substitute the less toxic chemical, engineer the exposure out, administer the work (training, hygiene, medical surveillance), PPE last. A worker with headache or dizziness near a solvent process is removed from exposure, medically evaluated, and the source investigated — not reassured back to the job.

How it is tested. Substitution items giving two LD50s (pick the higher — the classic inversion trap), route-matched controls, and combined-exposure scenarios (ototoxins + noise, teratogens + pregnancy).

The trap. Reading a higher LD50 as more toxic; treating PPE as the plan; ignoring combined exposures where each PEL alone looks "fine."

Sources cited in this excerpt

NIOSH: follow the hierarchy of controls from top to bottom. April 10, 2024. https://www.cdc.gov/niosh/hierarchy-of-controls/about/index.html
TWA: average exposure over typically 8 hours. OSHA. https://www.osha.gov/chemical-hazards
STEL: average exposure over typically 15–30 minutes. OSHA. https://www.osha.gov/chemical-hazards
Ceiling: an exposure limit that may never be exceeded. OSHA. https://www.osha.gov/chemical-hazards
LEV captures contaminants at or near the source. OSHA. https://www.osha.gov/otm/section-3-health-hazards/chapter-3
Typical LEV system: fans, hoods, ducts, air cleaners, stacks. OSHA. https://www.osha.gov/otm/section-3-health-hazards/chapter-3
OSHA noise PEL: 90 dBA averaged over 8 hours. https://www.osha.gov/otm/section-3-health-hazards/chapter-5
OSHA hearing conservation action level: 85 dBA TWA or 50% dose. https://www.osha.gov/otm/section-3-health-hazards/chapter-5
OSHA Standard Interpretation 1987-11-20-0 - Reduction of noise exposure for metal spray operations. Occupational Safety and Health Administration (OSHA), 1987-11-20. https://www.osha.gov/laws-regs/standardinterpretations/1987-11-20-0
29 CFR 1910.95 - Occupational noise exposure. Occupational Safety and Health Administration (OSHA), 2008-12-12. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.95
NIOSH noise REL: 85 dB(A) as an 8-hour TWA. February 8, 2016. https://www.cdc.gov/niosh/bulletin/2016/noise.html
NIOSH 3-dB exchange rate halves allowable exposure time. February 8, 2016. https://www.cdc.gov/niosh/bulletin/2016/noise.html
OSHA State Plans - Frequently Asked Questions. Occupational Safety and Health Administration (OSHA). https://www.osha.gov/stateplans/faqs
NIOSH RALs apply to unacclimatized workers, RELs to acclimatized workers. May 23, 2016. https://www.cdc.gov/niosh/bulletin/2016/extreme-heat.html
Heat acclimatization schedule for new workers. NIOSH, March 3, 2026. https://www.cdc.gov/niosh/heat-stress/recommendations/acclimatization.html
Heat acclimatization schedule for experienced workers. NIOSH, March 3, 2026. https://www.cdc.gov/niosh/heat-stress/recommendations/acclimatization.html
OSHA 1910.1096 definition of radiation. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1096
1 gray equals 100 rads. U.S. Nuclear Regulatory Commission, 2024. https://www.govinfo.gov/content/pkg/CFR-2024-title10-vol1/pdf/CFR-2024-title10-vol1-part20.pdf
1 rad equals 0.01 gray. U.S. Nuclear Regulatory Commission, 2024. https://www.govinfo.gov/content/pkg/CFR-2024-title10-vol1/pdf/CFR-2024-title10-vol1-part20.pdf
NRC adult annual total effective dose equivalent limit: 5 rem. U.S. Nuclear Regulatory Commission, 2024. https://www.govinfo.gov/content/pkg/CFR-2024-title10-vol1/pdf/CFR-2024-title10-vol1-part20.pdf
NIST: the mean is the value most commonly called the average. National Institute of Standards and Technology. https://www.itl.nist.gov/div898/handbook/eda/section3/eda351.htm
NIST: standard deviation restores spread to original data units. National Institute of Standards and Technology. https://www.itl.nist.gov/div898/handbook/eda/section3/eda356.htm
NIST: 99.7% of normal data within three standard deviations. National Institute of Standards and Technology. https://www.itl.nist.gov/div898/handbook/glossary.htm
200,000-hour base represents 100 employees working 40 hours for 50 weeks. OSHA, June 2019. https://www.osha.gov/sites/default/files/OSHA-RK-Forms-Package.pdf
DART incidence rate formula. OSHA, June 2019. https://www.osha.gov/sites/default/files/OSHA-RK-Forms-Package.pdf
29 CFR 1910.1200 - Hazard Communication. Occupational Safety and Health Administration (OSHA), 2026-01-15. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.1200

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