Certified Hazardous Materials Manager (CHMM) — Questions and Answers

Question 1: The CHMM exam is computer-based. Approximately how many questions does the exam contain?

200 (Correct answer)
50
100
300

Correct answer: 200

The CHMM exam consists of approximately 200 multiple-choice questions covering all hazardous materials management domains.

Question 2: A facility's pre-emergency planning process under OSHA 29 CFR 1910.38 requires coordination with outside parties. Which outside entity is most critical to include when planning for a potential chemical release emergency at a fixed facility?

The state department of transportation
The facility's insurance carrier
The Local Emergency Planning Committee (LEPC) and local fire department (Correct answer)
The EPA regional administrator

Correct answer: The Local Emergency Planning Committee (LEPC) and local fire department

OSHA 1910.38 requires facilities to coordinate emergency plans with local fire, police, and emergency medical services, with the LEPC being the key planning body for hazmat incidents.

Question 3: A small quantity generator (SQG) accumulating hazardous waste on-site must comply with which of the following?

A 270-day accumulation limit and specific container/tank standards (Correct answer)
Full TSDF permit requirements
A 270-day accumulation limit with biennial reporting
No accumulation time limit if containers are labeled properly

Correct answer: A 270-day accumulation limit and specific container/tank standards

SQGs may accumulate hazardous waste for up to 270 days and must meet container and tank management standards under 40 CFR 262.

Question 4: Which EPA regulation requires facilities to report accidental releases of extremely hazardous substances to state and local emergency planning committees?

RCRA Section 3010
TSCA Section 8(e)
EPCRA Section 304 (Correct answer)
CAA Section 112(r)

Correct answer: EPCRA Section 304

EPCRA Section 304 mandates immediate notification of releases of extremely hazardous substances above reportable quantities.

Question 5: Under OSHA's Process Safety Management (PSM) standard (29 CFR 1910.119), what is the threshold quantity of flammable liquids that triggers PSM requirements when they are stored in a single vessel?

5,000 pounds
10,000 pounds (Correct answer)
25,000 pounds
500 pounds

Correct answer: 10,000 pounds

OSHA PSM applies to flammable liquids stored in a single vessel at or above 10,000 pounds.

Question 6: Thermal in situ remediation techniques such as electrical resistance heating (ERH) are most advantageous for which contaminant class?

Radioactive isotopes in bedrock
Dissolved nitrate in shallow aquifers
Heavy metals in surface soil
Chlorinated solvents with low vapor pressure in low-permeability soils (Correct answer)

Correct answer: Chlorinated solvents with low vapor pressure in low-permeability soils

ERH heats the subsurface to increase volatility of chlorinated solvents, enabling vapor extraction even from tight, low-permeability formations where other methods fail.

Question 7: Which U.S. federal law primarily governs the management and disposal of solid and hazardous waste?

TSCA
EPCRA
CERCLA
RCRA (Correct answer)

Correct answer: RCRA

RCRA (Resource Conservation and Recovery Act) establishes the framework for managing solid and hazardous waste from cradle to grave.

Question 8: Under DOT regulations, which of the following is a Packing Group I material?

A material with no packing requirement
A material presenting a minor danger
A material presenting a medium danger
A material presenting a great danger (Correct answer)

Correct answer: A material presenting a great danger

Packing Group I designates materials presenting the greatest danger, requiring the most stringent packaging standards.

Question 9: Under 40 CFR Part 112 (SPCC), which facilities are required to prepare a Spill Prevention, Control, and Countermeasure plan?

Non-transportation facilities with aggregate above-ground oil storage capacity above 1,320 gallons or total underground storage exceeding 42,000 gallons (Correct answer)
Facilities with more than 500 gallons of petroleum stored in a single container
Facilities storing petroleum within 100 feet of a navigable waterway
Any facility that stores petroleum products regardless of quantity

Correct answer: Non-transportation facilities with aggregate above-ground oil storage capacity above 1,320 gallons or total underground storage exceeding 42,000 gallons

SPCC requirements apply to non-transportation facilities meeting the capacity thresholds and with a reasonable potential to discharge oil to navigable waters.

Question 10: A facility performing hazardous waste site remediation must ensure all general site workers have completed how many hours of initial HAZWOPER training?

40 hours (Correct answer)
16 hours
8 hours
24 hours

Correct answer: 40 hours

29 CFR 1910.120(e)(3) requires 40 hours of off-site instruction plus 3 days of field experience for general site workers at uncontrolled hazardous waste sites.

Question 11: Under RCRA, which of the following is NOT a required element of a container storage area inspection for hazardous waste?

Conducting a weekly visual inspection
Verifying labels are present and legible
Testing the chemical composition of waste in each container (Correct answer)
Checking for leaks or deterioration

Correct answer: Testing the chemical composition of waste in each container

RCRA requires visual inspections of containers for leaks and label integrity but does not require chemical testing of waste in each container.

Question 12: Under OSHA's Process Safety Management (PSM) standard, what is the threshold quantity for flammable liquids and gases that triggers coverage?

15,000 lbs
10,000 lbs (Correct answer)
25,000 lbs
5,000 lbs

Correct answer: 10,000 lbs

29 CFR 1910.119 sets the threshold quantity for flammable liquids and gases at 10,000 lbs for PSM applicability.

Question 13: OSHA's Process Safety Management (PSM) standard (29 CFR 1910.119) applies to processes containing threshold quantities of which types of substances?

Radioactive materials only
Chemicals listed on the RCRA F-list only
Any chemical exceeding 55 gallons on-site
Highly hazardous chemicals including flammables and toxics (Correct answer)

Correct answer: Highly hazardous chemicals including flammables and toxics

PSM applies to processes with threshold quantities of highly hazardous chemicals—substances with toxic, flammable, reactive, or explosive properties—listed in Appendix A.

Question 14: When transporting hazardous materials by vessel, which international code governs the segregation requirements?

ADR Agreement
IMDG Code (Correct answer)
IATA DGR
RID Regulations

Correct answer: IMDG Code

The International Maritime Dangerous Goods (IMDG) Code governs the transport of hazardous materials by sea, including segregation requirements.

Question 15: Corrosive hazardous materials should be stored at low levels (bottom shelves or floor) primarily because:

Corrosives require grounding, which is only available at floor level
A spill from a high location increases splash exposure and the area of contamination (Correct answer)
OSHA requires all hazardous materials to be stored at floor level
Corrosives are heavier and may collapse upper shelving

Correct answer: A spill from a high location increases splash exposure and the area of contamination

Storing corrosives at low levels minimizes the splash radius and worker exposure risk if a container is dropped or falls.

Question 16: Which NFPA standard specifically addresses the storage of flammable and combustible liquids in buildings and other structures?

NFPA 58
NFPA 30 (Correct answer)
NFPA 101
NFPA 70

Correct answer: NFPA 30

NFPA 30 is the Flammable and Combustible Liquids Code, which governs their storage in buildings and tanks.

Question 17: The process of identifying what can go wrong, how likely it is, and what the consequences are is the definition of which activity?

Risk assessment (Correct answer)
Safety audit
Process safety management
Consequence analysis

Correct answer: Risk assessment

Risk assessment is the structured process of identifying hazards, estimating likelihood and consequences, and characterizing overall risk.

Question 18: Which EPA program requires generators to track hazardous waste electronically using the e-Manifest system?

DOT Hazmat Registration Program
CERCLA National Priorities List
TSCA Chemical Data Reporting
RCRA e-Manifest system under 40 CFR Part 262 (Correct answer)

Correct answer: RCRA e-Manifest system under 40 CFR Part 262

EPA's e-Manifest system, established under the Hazardous Waste Electronic Manifest Establishment Act, allows electronic tracking of hazardous waste shipments under 40 CFR Part 262.

Question 19: Which label element is specifically required on hazardous waste containers at the point of accumulation under RCRA?

The words 'Hazardous Waste' and the accumulation start date (Correct answer)
The generator's EPA ID number and the waste's physical state
The quantity in the container and the generator's address
The EPA waste code and accumulation start date

Correct answer: The words 'Hazardous Waste' and the accumulation start date

RCRA requires containers to be labeled 'Hazardous Waste' and marked with the date accumulation began, among other required information.

Question 20: What information must appear in the basic description of a hazardous material on a shipping paper?

Carrier name, route, and delivery address
ERG guide number, flash point, and NFPA rating
UN/NA number, proper shipping name, hazard class, and packing group (if applicable) (Correct answer)
Trade name, manufacturer, and SDS number

Correct answer: UN/NA number, proper shipping name, hazard class, and packing group (if applicable)

The basic description per 49 CFR 172.202 must list the UN/NA number, proper shipping name, hazard class or division, and packing group in that sequence.

Question 21: A hazmat employee who is a new hire must receive initial hazmat training within how many days of employment?

180 days
30 days
60 days
90 days (Correct answer)

Correct answer: 90 days

49 CFR 172.704(c) requires new hazmat employees to receive initial training within 90 days of employment or assignment to a hazmat function.

Question 22: In developing a facility emergency response plan, a 'consequence analysis' is used to:

Estimate the potential impacts — on people, environment, and property — of a hazardous material release (Correct answer)
Identify which employees are responsible for emergency response actions
Calculate the regulatory fines associated with a reportable release
Determine the likelihood that a specific emergency scenario will occur

Correct answer: Estimate the potential impacts — on people, environment, and property — of a hazardous material release

Consequence analysis evaluates the magnitude of harm from a hypothetical release scenario, informing protective action planning and resource allocation.

Question 23: A generator produces exactly 99 kg of acute hazardous waste in a calendar month. How is this generator classified?

Large Quantity Generator (LQG) (Correct answer)
Small Quantity Generator (SQG)
Very Small Quantity Generator (VSQG)
Conditionally Exempt Small Quantity Generator (CESQG)

Correct answer: Large Quantity Generator (LQG)

Generators producing more than 1 kg of acute (P-listed) hazardous waste per month are classified as Large Quantity Generators regardless of total waste volume.

Question 24: Which of the following best describes a 'Portable Tank' (T-code) used in hazmat transportation?

A non-bulk container under 450 liters
A DOT Specification 406 cargo tank
A fixed tank mounted permanently on a tank truck chassis
A bulk packaging designed to be filled, transported, emptied, and refilled, not permanently attached to a vehicle (Correct answer)

Correct answer: A bulk packaging designed to be filled, transported, emptied, and refilled, not permanently attached to a vehicle

Portable tanks (identified by T-codes in the HMT) are bulk packagings designed to be filled, transported, emptied, and reused, and are not permanently attached to any transport vehicle.

Question 25: Which of the following best describes 'shelter-in-place' as a protective action during a hazmat release?

Sending residents to high-ground locations away from vapors
Moving responders to the warm zone perimeter
Having people remain indoors with windows/doors closed to reduce exposure (Correct answer)
Evacuating residents to a pre-designated shelter facility

Correct answer: Having people remain indoors with windows/doors closed to reduce exposure

Shelter-in-place directs people to stay inside buildings with openings sealed to minimize exposure to outdoor contaminants.

Question 26: Which enforcement tool allows EPA to issue an order requiring immediate compliance with RCRA requirements without going to court?

Notice of violation
Administrative compliance order (ACO) (Correct answer)
Compliance schedule order
Consent decree

Correct answer: Administrative compliance order (ACO)

EPA can issue administrative compliance orders under RCRA Section 3008 directing violators to take corrective action without the need for court proceedings.

Question 27: When selecting a treatment method for a hazardous waste under RCRA LDRs, EPA's preferred hierarchy of management options places what approach at the highest preference level?

Incineration at permitted hazardous waste incinerators
Landfill disposal with liner systems
Deep well injection below USDW
Treatment to destroy or reduce toxicity and mobility of hazardous constituents (Correct answer)

Correct answer: Treatment to destroy or reduce toxicity and mobility of hazardous constituents

RCRA's waste management hierarchy and LDR framework prioritize treatment that destroys or reduces the toxicity, mobility, or volume of hazardous constituents over land disposal.

Question 28: CERCLA, commonly known as Superfund, authorizes the EPA to do which of the following?

Set occupational exposure limits for hazardous substances
Clean up uncontrolled hazardous waste sites and pursue cost recovery (Correct answer)
Regulate the manufacture of new chemicals
Issue operating permits for hazardous waste facilities

Correct answer: Clean up uncontrolled hazardous waste sites and pursue cost recovery

CERCLA authorizes the EPA to investigate and clean up contaminated sites and recover costs from responsible parties.

Question 29: Which document must accompany a hazardous waste shipment from the point of generation to its final destination?

EPA Notification Form
Bill of lading
OSHA 300 Log
Uniform Hazardous Waste Manifest (Correct answer)

Correct answer: Uniform Hazardous Waste Manifest

The Uniform Hazardous Waste Manifest (EPA Form 8700-22) must accompany all off-site shipments of hazardous waste.

Question 30: A facility discovers that a hazardous waste storage container has begun to leak. Under RCRA interim status standards, the facility must:

Continue use if the leak rate is less than 1 drop per minute
Transfer the waste to a new container immediately or overpak the leaking container (Correct answer)
Place the container in secondary containment and document the date
Notify EPA within 24 hours and wait for guidance

Correct answer: Transfer the waste to a new container immediately or overpak the leaking container

40 CFR 265.171 requires that leaking containers be immediately transferred to good containers or overpackaged to prevent releases.

Question 31: A facility has a total aboveground oil storage capacity of 1,500 gallons, consisting of multiple tanks, none of which are larger than 500 gallons. The facility's location is such that a spill could reasonably be expected to discharge into a nearby river. According to 40 CFR Part 112, why is this facility required to have a Spill Prevention, Control, and Countermeasure (SPCC) Plan?

Because it has a completely buried storage capacity greater than 42,000 gallons.
Because it has a single container with a capacity greater than 660 gallons.
Because its aggregate aboveground storage capacity exceeds 1,320 gallons and a spill could reach navigable waters. (Correct answer)
Because it stores more than one type of petroleum oil.

Correct answer: Because its aggregate aboveground storage capacity exceeds 1,320 gallons and a spill could reach navigable waters.

The SPCC rule applies to facilities that meet two criteria: 1) they have an aggregate aboveground oil storage capacity greater than 1,320 U.S. gallons (or a buried capacity over 42,000 gallons), and 2) due to their location, they could reasonably be expected to discharge oil into navigable waters. This facility's total capacity of 1,500 gallons exceeds the 1,320-gallon threshold, and it has the potential to impact a navigable waterway, making an SPCC plan mandatory.

Question 32: A chemical manufacturing plant needs to store a new, highly flammable liquid (OSHA Category 1). According to OSHA standard 29 CFR 1910.106, what is the maximum quantity of this liquid that can be stored in a single approved flammable storage cabinet?

60 gallons (Correct answer)
25 gallons
30 gallons
120 gallons

Correct answer: 60 gallons

OSHA's standard for flammable liquids, 29 CFR 1910.106, specifies that not more than 60 gallons of Category 1, 2, or 3 flammable liquids shall be stored in any one storage cabinet.

Question 33: When two chemicals together produce a combined effect greater than the sum of their individual effects, this interaction is called:

Synergistic toxicity (Correct answer)
Additive toxicity
Potentiation
Antagonistic toxicity

Correct answer: Synergistic toxicity

Synergistic toxicity occurs when combined exposure produces an effect greater than the arithmetic sum (1+1>2), such as asbestos and cigarette smoking multiplicatively increasing lung cancer risk.

Question 34: Which of the following best describes a 'Very Small Quantity Generator' (VSQG) under RCRA's 2016 Generator Improvements Rule?

A generator exempt from all RCRA requirements
A generator that produces less than 1 kg of acute hazardous waste per month
A generator that produces 100 kg or less of hazardous waste per calendar month and stores no more than 1,000 kg on-site (Correct answer)
A generator that produces less than 100 kg of hazardous waste per month

Correct answer: A generator that produces 100 kg or less of hazardous waste per calendar month and stores no more than 1,000 kg on-site

VSQGs generate 100 kg or less of hazardous waste and 1 kg or less of acute hazardous waste per month under 40 CFR 262.14.

Question 35: Which RCRA concept determines whether contaminated environmental media (soil, groundwater) at a TSDF is subject to RCRA Subtitle C hazardous waste regulation?

Land disposal restriction variance
Mixture rule
Derived-from rule
Contained-in policy (Correct answer)

Correct answer: Contained-in policy

The contained-in policy states that environmental media is not itself a listed waste but is subject to RCRA if it 'contains' a listed hazardous waste.

Question 36: Which of the following scenarios represents a conflict of interest that a CHMM must disclose under ethical obligations?

Attending a conference sponsored by a trade association
Working for two different clients in different industry sectors simultaneously
Owning stock in a company that manufactures hazardous materials containers while consulting on packaging compliance for that company (Correct answer)
Holding a state environmental engineer license in addition to the CHMM

Correct answer: Owning stock in a company that manufactures hazardous materials containers while consulting on packaging compliance for that company

A financial interest in a company for which one provides professional consulting creates a conflict of interest that must be disclosed per the CHMM Code of Ethics.

Question 37: Which of the following best describes the purpose of a facility's written Chemical Hygiene Plan (CHP) required by OSHA 29 CFR 1910.1450?

To outline the PPE selection process for emergency responders
To establish work practices, exposure controls, and procedures for protecting laboratory workers from hazardous chemicals (Correct answer)
To satisfy EPA reporting requirements for toxic chemical releases
To document procedures for disposing of laboratory chemicals under RCRA

Correct answer: To establish work practices, exposure controls, and procedures for protecting laboratory workers from hazardous chemicals

The CHP is an OSHA-required written program for laboratories specifying engineering controls, PPE, and procedures to protect workers from chemical exposures.

Question 38: How does holding a CHMM credential primarily benefit an organization?

It qualifies the organization for automatic federal contracting preferences
It demonstrates that qualified professionals are managing hazardous materials risks and compliance (Correct answer)
It replaces the need for site-specific hazardous waste permits
It guarantees the organization immunity from EPA enforcement actions

Correct answer: It demonstrates that qualified professionals are managing hazardous materials risks and compliance

Employing a CHMM signals to regulators, clients, and the public that the organization has competent professionals overseeing its hazardous materials programs.

Question 39: Under OSHA 29 CFR 1910.120, which level of training is required for hazardous materials emergency responders who take defensive actions without actually trying to stop the release?

Hazmat Specialist
Hazmat Technician
First Responder Awareness
First Responder Operations (Correct answer)

Correct answer: First Responder Operations

First Responder Operations level training is required for those who respond defensively to releases without trying to stop them.

Question 40: What is the minimum secondary containment capacity required for a single AST under EPA SPCC regulations?

The volume of the largest expected spill
100% of all tanks' combined capacity
50% of the tank's storage capacity
110% of the largest tank's capacity (Correct answer)

Correct answer: 110% of the largest tank's capacity

EPA SPCC regulations require secondary containment sufficient to hold 110% of the largest single tank's capacity.

Question 41: Which federal agency publishes the National Oil and Hazardous Substances Pollution Contingency Plan (NCP), which serves as the regulatory framework for responding to oil spills and hazardous substance releases under CERCLA?

DOT/PHMSA
EPA (Correct answer)
FEMA
OSHA

Correct answer: EPA

EPA promulgates and maintains the NCP (40 CFR Part 300), which establishes the national response system and procedures for oil and hazardous substance incidents.

Question 42: What does 'CHMM' stand for?

Chemical Handling and Materials Management
Chemical and Hazardous Materials Monitor
Certified Hazardous Materials Manager (Correct answer)
Certified Hazmat Mitigation Manager

Correct answer: Certified Hazardous Materials Manager

CHMM stands for Certified Hazardous Materials Manager, the credential awarded by IHMM.

Question 43: A groundwater plume of hexavalent chromium Cr(VI) can be treated in situ by injecting which reagent to reduce it to less mobile Cr(III)?

Potassium permanganate
Ferrous sulfate or sodium bisulfite (Correct answer)
Hydrogen peroxide
Sodium persulfate

Correct answer: Ferrous sulfate or sodium bisulfite

Ferrous sulfate and sodium bisulfite are reductants that convert toxic Cr(VI) to Cr(III), which precipitates out of solution and is far less mobile and toxic.

Question 44: A facility that generates between 100 and 1,000 kg of hazardous waste per month is classified under RCRA as which type of generator?

Small Quantity Generator (SQG) (Correct answer)
Conditionally Exempt Generator (CEG)
Very Small Quantity Generator (VSQG)
Large Quantity Generator (LQG)

Correct answer: Small Quantity Generator (SQG)

Small Quantity Generators (SQGs) generate between 100 and 1,000 kg of hazardous waste per month and have a 270-day accumulation limit.

Question 45: Under IHMM policy, which of the following actions could result in revocation of a CHMM credential?

Changing employers without notifying IHMM
Failing to attend an IHMM annual conference
Misrepresenting credentials or providing false information on applications (Correct answer)
Working in a state without a hazardous materials permit

Correct answer: Misrepresenting credentials or providing false information on applications

Fraudulent misrepresentation or providing false information is a direct violation of IHMM ethics policy and grounds for credential revocation.

Question 46: Which regulatory framework specifically governs the investigation and cleanup of releases from underground storage tanks (USTs) containing petroleum products?

CERCLA Superfund program
Clean Water Act SPCC rule
TSCA Section 7 imminent hazard authority
RCRA Subtitle I UST regulations (40 CFR Part 280) (Correct answer)

Correct answer: RCRA Subtitle I UST regulations (40 CFR Part 280)

RCRA Subtitle I and 40 CFR Part 280 establish the UST program, including release detection, corrective action, and closure requirements for petroleum UST systems.

Question 47: Which of the following is an acceptable professional reference for a CHMM application?

A personal friend who is also a CHMM
A family member with an environmental science degree
A direct supervisor familiar with the applicant's hazardous materials work (Correct answer)
Any licensed attorney

Correct answer: A direct supervisor familiar with the applicant's hazardous materials work

IHMM requires professional references who can verify the applicant's hazardous materials management experience, typically a supervisor or senior colleague.

Question 48: When conducting a Hazard and Operability (HAZOP) study at a facility, the term 'deviation' refers to which of the following?

A difference between actual and target production yield
A departure from design intent identified by applying guide words to process parameters (Correct answer)
An unplanned equipment failure recorded in the maintenance log
A variance granted by a regulatory agency for process operation

Correct answer: A departure from design intent identified by applying guide words to process parameters

In a HAZOP, deviations are identified by combining guide words (e.g., 'no,' 'more') with process parameters to find departures from design intent.

Question 49: An Environmental Management System (EMS) based on ISO 14001 supports pollution prevention most effectively through:

Certifying that a facility has met all federal and state environmental permit requirements
Prescribing specific emission limits tailored to each facility's production output
Automating hazardous waste manifest preparation to reduce paperwork errors
Establishing a Plan-Do-Check-Act cycle that drives continual improvement in environmental performance (Correct answer)

Correct answer: Establishing a Plan-Do-Check-Act cycle that drives continual improvement in environmental performance

ISO 14001's Plan-Do-Check-Act framework creates a structured cycle for identifying environmental aspects, setting objectives, implementing controls, and reviewing results to achieve continual P2 improvement.

Question 50: SARA Title III is also known by what common name?

Hazardous Waste Operations and Emergency Response
Pollution Prevention Act
Emergency Planning and Community Right-to-Know Act (EPCRA) (Correct answer)
Comprehensive Environmental Response Act

Correct answer: Emergency Planning and Community Right-to-Know Act (EPCRA)

SARA Title III is commonly called EPCRA and requires facilities to report chemical hazards and releases to support local emergency planning.

Question 51: A facility's wastewater treatment sludge tests positive for lead above the TCLP regulatory level. What RCRA waste code applies?

K048
F006
U151
D008 (Correct answer)

Correct answer: D008

D008 is the RCRA hazardous waste code for wastes exhibiting the toxicity characteristic for lead, based on TCLP results exceeding 5.0 mg/L.

Question 52: A radioactive material's transport index (TI) is used to:

Control radiation exposure by limiting the number of packages that can be co-loaded (Correct answer)
Determine the flash point of the material
Calculate the shipper's liability under CERCLA
Identify the specific isotope in the package

Correct answer: Control radiation exposure by limiting the number of packages that can be co-loaded

The Transport Index (TI) is a number assigned to radioactive packages that controls the maximum radiation level at 1 meter and limits co-loading to protect workers and the public.

Question 53: What is the primary purpose of a 'termination briefing' at the conclusion of a hazmat incident?

To notify insurance carriers that the incident has been resolved
To debrief media and release final information to the public
To document lessons learned, critique operations, and identify follow-up actions (Correct answer)
To formally transfer custody of contaminated materials to a licensed disposal firm

Correct answer: To document lessons learned, critique operations, and identify follow-up actions

A termination briefing documents what went right and wrong, captures lessons learned, and assigns follow-up responsibilities to improve future responses.

Question 54: Under OSHA's standard for Access to Employee Exposure and Medical Records (29 CFR 1910.1020), for how long must an employer preserve and maintain employee exposure records related to toxic substances and harmful physical agents?

For the duration of employment plus 5 years.
For the duration of employment plus 30 years. (Correct answer)
For 10 years after the employee's termination.
For 5 years from the date the record was created.

Correct answer: For the duration of employment plus 30 years.

29 CFR 1910.1020(d)(1)(ii) requires that each employee exposure record be preserved and maintained for at least thirty (30) years past the duration of employment. This extended period is necessary to allow for the monitoring and identification of long-latency occupational diseases that may not become apparent for many years.

Question 55: Under EPCRA Section 313, what is the Toxics Release Inventory (TRI) program designed to track?

Occupational illnesses caused by toxic exposures
Releases and transfers of listed toxic chemicals from manufacturing facilities (Correct answer)
Environmental violations by regulated industries
Imports of toxic chemicals from foreign countries

Correct answer: Releases and transfers of listed toxic chemicals from manufacturing facilities

TRI tracks annual releases and off-site transfers of listed toxic chemicals from covered facilities, making data publicly available.

Question 56: The Emergency Response Guidebook (ERG) orange-bordered guides provide:

Exact toxicological data for each chemical
Cleanup and remediation procedures
Initial isolation and protective action distances (Correct answer)
Long-term health monitoring protocols

Correct answer: Initial isolation and protective action distances

ERG orange guides provide initial isolation distances and protective action distances for first responders.

Question 57: Soil washing is an ex situ remediation technology that concentrates contaminants into which fraction for further treatment or disposal?

The coarse sand and gravel fraction
The fine-grained silt and clay fraction (Correct answer)
The vapor phase
The intermediate gravel fraction

Correct answer: The fine-grained silt and clay fraction

Contaminants preferentially sorb to fine-grained particles; soil washing separates and concentrates the fine fraction, allowing the bulk of cleaner coarse material to be reused.

Question 58: A site has chlorinated solvent DNAPL contamination. Which technology directly targets the dense non-aqueous phase liquid source zone most effectively?

Air sparging alone
Pump and treat with activated carbon
In situ chemical oxidation (ISCO) (Correct answer)
Monitored natural attenuation

Correct answer: In situ chemical oxidation (ISCO)

ISCO delivers oxidants such as permanganate, persulfate, or hydrogen peroxide directly into the source zone to chemically destroy DNAPL-phase contaminants.

Question 59: What is the primary purpose of conducting a 'hot wash' immediately after a hazmat incident?

To conduct an immediate after-action review while events are fresh (Correct answer)
To document financial costs for FEMA reimbursement
To decontaminate equipment using high-pressure hot water
To brief media on what chemicals were released

Correct answer: To conduct an immediate after-action review while events are fresh

A hot wash is an immediate after-action review conducted at the scene while responders' memories are fresh.

Question 60: In the CERCLA (Superfund) process, which key document is issued after the completion of the Remedial Investigation/Feasibility Study (RI/FS) to formally select the remedy for a contaminated site and provide the legal basis for the cleanup action?

Conceptual Site Model (CSM)
Preliminary Assessment (PA)
RCRA Facility Investigation (RFI)
Record of Decision (ROD) (Correct answer)

Correct answer: Record of Decision (ROD)

The Record of Decision (ROD) is a public, legal document that explains which cleanup alternative will be used to remediate a Superfund site. It is prepared after the RI/FS and the public comment period on the Proposed Plan. A Preliminary Assessment is an initial step, a Conceptual Site Model is a tool used during the investigation, and an RFI is part of the RCRA Corrective Action process.

Question 61: During post-incident decontamination, which method is considered most effective for removing water-soluble chemical contaminants from skin?

Application of neutralizing agents first, then rinsing
Absorption with dry materials followed by disposal
Dry brushing followed by vacuuming
Copious water flushing for at least 15-20 minutes (Correct answer)

Correct answer: Copious water flushing for at least 15-20 minutes

Copious water flushing for at least 15-20 minutes is the most effective first-line method for water-soluble contaminants.

Question 62: A facilities manager at a large office complex is consolidating items for proper disposition. Which of the following items generated at the facility can be managed under the less stringent Universal Waste regulations (40 CFR Part 273)?

Asbestos-containing floor tiles removed during a renovation.
Used fluorescent light bulbs containing mercury. (Correct answer)
Unused, expired epoxy resin that exhibits the characteristic of ignitability.
Spent solvent from cleaning machine parts in the maintenance shop.

Correct answer: Used fluorescent light bulbs containing mercury.

The EPA's Universal Waste regulations streamline management for certain common hazardous wastes. The five federal categories of universal waste are batteries, pesticides, mercury-containing equipment, lamps, and aerosol cans. Used fluorescent bulbs fall under the "lamps" category. Asbestos, spent solvents (typically a listed hazardous waste), and unused characteristic hazardous wastes must be managed under full RCRA Subtitle C regulations.

Question 63: The term 'secondary contamination' in hazmat response refers to:

Chemical reactions that produce new hazardous byproducts during cleanup
Transfer of contaminants from victims or equipment to previously uncontaminated persons or areas (Correct answer)
Contamination that occurs below ground level from a surface spill
A second chemical release that occurs after the initial spill

Correct answer: Transfer of contaminants from victims or equipment to previously uncontaminated persons or areas

Secondary contamination occurs when a contaminated person, object, or substance spreads contamination to previously clean responders, patients, or areas.

Question 64: Under OSHA 29 CFR 1910.1200 (Hazard Communication), what must be posted or immediately available in a hazardous materials storage area?

Safety Data Sheets (SDS) for all hazardous chemicals present (Correct answer)
The facility's RCRA permit or interim status documentation
Copies of all DOT shipping papers for stored materials
A complete inventory of all chemicals with their CAS numbers

Correct answer: Safety Data Sheets (SDS) for all hazardous chemicals present

OSHA Hazard Communication requires that SDS for all hazardous chemicals be readily accessible to employees in their work area, including storage areas.

Question 65: Which act requires owners and operators of underground storage tanks (USTs) to meet specific technical and financial responsibility requirements?

OPA 90
CERCLA Section 107
RCRA Subtitle I (Correct answer)
SARA Title III

Correct answer: RCRA Subtitle I

RCRA Subtitle I specifically addresses underground storage tanks and requires leak detection, spill and overfill prevention, and corrective action.

Question 66: A candidate with a PhD in environmental chemistry but only 1.5 years of hazardous materials management experience applies for the CHMM exam. What is the most likely outcome?

Denied permanently due to academic overqualification
Approved, because the PhD compensates for the experience gap
Denied, because the candidate does not yet meet the 3-year experience requirement (Correct answer)
Approved provisionally, pending submission of a project portfolio

Correct answer: Denied, because the candidate does not yet meet the 3-year experience requirement

Regardless of advanced degrees, IHMM requires at least 3 years of professional experience; 1.5 years is insufficient under the standard pathway.

Question 67: Phytoremediation using plants to uptake and concentrate metals in above-ground biomass is specifically called what?

Phytostabilization
Rhizofiltration
Phytoextraction (Correct answer)
Phytodegradation

Correct answer: Phytoextraction

Phytoextraction uses hyperaccumulator plants to take up metals from soil into harvestable shoot tissue, which is then removed and disposed of to reduce soil metal concentrations.

Question 68: What is the purpose of biological monitoring in an occupational health program?

To determine surface contamination levels on work equipment
To assess the effectiveness of engineering controls at the source
To measure ambient air concentrations of hazardous substances near workers
To measure the actual internal dose of a toxicant or its metabolites in workers' blood, urine, or exhaled air (Correct answer)

Correct answer: To measure the actual internal dose of a toxicant or its metabolites in workers' blood, urine, or exhaled air

Biological monitoring measures internal body burden via biomarkers in biological specimens, reflecting actual absorbed dose from all exposure routes combined.

Question 69: Which chemical property most directly determines whether a substance will volatilize from soil or water and become an inhalation hazard?

Henry's Law constant (Correct answer)
Octanol-water partition coefficient (Kow)
Boiling point range
Soil organic carbon partition coefficient (Koc)

Correct answer: Henry's Law constant

Henry's Law constant describes the partitioning of a chemical between the dissolved and vapor phases, directly indicating its tendency to volatilize into the air.

Question 70: A facility discovers a discrepancy between the quantity of hazardous waste listed on the manifest and the quantity actually received. What must the TSD facility do?

Refuse the shipment and return it to the generator immediately
Accept the shipment and notify the generator verbally
File a complaint with DOT within 5 days
Note the discrepancy on the manifest and report significant discrepancies to EPA within 15 days (Correct answer)

Correct answer: Note the discrepancy on the manifest and report significant discrepancies to EPA within 15 days

RCRA requires TSD facilities to note manifest discrepancies and report significant ones (10% or more by weight) to the EPA regional administrator within 15 days.

Question 71: A 'forbidden' hazardous material listed in the Hazardous Materials Table means:

The material must be escorted by law enforcement
The material requires a special permit to transport
The material is restricted to ground transport only
The material may not be transported in commerce under any circumstances (Correct answer)

Correct answer: The material may not be transported in commerce under any circumstances

Materials marked 'Forbidden' in the HMT are absolutely prohibited from transportation in commerce and no special permit can authorize their shipment.

Question 72: Under OSHA's respiratory protection standard (29 CFR 1910.134), before an employee is fit-tested for a tight-fitting respirator, what must be completed first?

A qualitative fit test using BitrexTM solution
At least 8 hours of respirator training
Selection of the specific respirator model and cartridge type
A medical evaluation by a physician or licensed health professional (Correct answer)

Correct answer: A medical evaluation by a physician or licensed health professional

OSHA requires medical evaluation before fit testing to ensure the employee is physically capable of wearing a respirator without adverse health effects.

Question 73: Under CERCLA, the National Contingency Plan (NCP) requires that remedies selected for Superfund sites meet what primary standard?

Applicable or relevant and appropriate requirements (ARARs) (Correct answer)
Cost-effectiveness only
Best available technology (BAT)
State permit compliance only

Correct answer: Applicable or relevant and appropriate requirements (ARARs)

NCP requires that Superfund remedies attain ARARs, which are federal and state environmental standards relevant to the site conditions.

Question 74: A driver transporting hazardous materials must keep the shipping papers within reach when:

At a weigh station
Loading the vehicle
Filing trip reports
The vehicle is in motion (Correct answer)

Correct answer: The vehicle is in motion

49 CFR 177.817 requires shipping papers to be within the driver's immediate reach while the vehicle is in motion.

Question 75: Under CERCLA, which legal doctrine holds all potentially responsible parties jointly and severally liable for cleanup costs at a Superfund site?

Negligence per se
Joint and several liability (Correct answer)
Contributory liability
Strict liability

Correct answer: Joint and several liability

CERCLA imposes joint and several liability, meaning any one responsible party can be held liable for the entire cleanup cost regardless of their proportional contribution.

Question 76: A shipper must retain a copy of hazardous materials shipping papers for how long after the material is accepted by the initial carrier?

1 year
3 years
2 years (Correct answer)
5 years

Correct answer: 2 years

49 CFR 172.201(e) requires shippers to retain shipping paper copies for 2 years after acceptance by the carrier.

Question 77: Which federal regulation governs the National Pollutant Discharge Elimination System (NPDES) permit program for wastewater discharges?

Clean Air Act Section 111
Clean Water Act Section 402 (Correct answer)
RCRA Section 3004
Safe Drinking Water Act Section 1421

Correct answer: Clean Water Act Section 402

Clean Water Act Section 402 establishes the NPDES program, requiring permits for discharges of pollutants into waters of the United States.

Question 78: Which statement accurately describes the scope of the CHMM credential?

It is a broad professional credential covering management of hazardous materials across multiple regulatory programs (Correct answer)
It is specific only to RCRA hazardous waste facilities
It is limited to military or government agency personnel
It authorizes the holder to transport hazardous materials without a DOT hazmat endorsement

Correct answer: It is a broad professional credential covering management of hazardous materials across multiple regulatory programs

The CHMM is a comprehensive credential applicable across regulatory domains including RCRA, CERCLA, DOT, and OSHA, not restricted to a single program or sector.

Question 79: Risk-based corrective action (RBCA) frameworks allow remediation to a site-specific risk level rather than a generic standard. What primary factor drives site-specific cleanup levels?

The age of the contamination
The cost of the most expensive technology
Exposure pathways, receptor populations, and contaminant toxicity (Correct answer)
The depth of the water table

Correct answer: Exposure pathways, receptor populations, and contaminant toxicity

RBCA tier calculations incorporate contaminant toxicity, site-specific exposure pathways, and sensitive receptors to derive protective cleanup levels tailored to actual risk.

Question 80: Which of the following is a core requirement of an employer's energy control program under OSHA's Lockout/Tagout (LOTO) standard, 29 CFR 1910.147?

Providing first aid training to all authorized employees.
Developing, documenting, and utilizing procedures to control hazardous energy. (Correct answer)
Conducting monthly fire extinguisher inspections in the LOTO area.
Ensuring all new machinery is painted a specific safety color.

Correct answer: Developing, documenting, and utilizing procedures to control hazardous energy.

The LOTO standard, 29 CFR 1910.147, requires employers to establish a program consisting of energy control procedures, employee training, and periodic inspections. A central component is developing and documenting specific procedures for affixing lockout or tagout devices to control hazardous energy during servicing and maintenance.

Question 81: A CHMM is asked to sign off on a hazardous waste manifest for a shipment outside her direct area of expertise. According to the CHMM Code of Ethics, what should she do?

Sign but add a disclaimer noting limited expertise
Sign the manifest to avoid project delays
Delegate the task to an uncertified technician
Refuse to sign and consult a qualified expert before proceeding (Correct answer)

Correct answer: Refuse to sign and consult a qualified expert before proceeding

The CHMM Code of Ethics requires practitioners to work only within their competence and to seek expert guidance when encountering matters outside their expertise.

Question 82: What is the purpose of the National Response Center (NRC) database maintained by the USCG?

To issue hazmat transportation permits to carriers
To certify hazmat emergency responders nationally
To track RCRA manifest discrepancies
To centrally record all federally reportable hazardous substance releases (Correct answer)

Correct answer: To centrally record all federally reportable hazardous substance releases

The NRC serves as the single federal point of contact for reporting releases and maintains a database of all reportable hazardous substance incidents.

Question 83: What is the primary purpose of the Toxic Substances Control Act (TSCA)?

Establish worker right-to-know requirements
Set cleanup standards for contaminated soil
Evaluate and control risks from existing and new chemicals in commerce (Correct answer)
Regulate transportation of hazardous materials

Correct answer: Evaluate and control risks from existing and new chemicals in commerce

TSCA gives EPA authority to require reporting, recordkeeping, and testing of chemical substances and to restrict those that pose unreasonable risks.

Question 84: Which hazard analysis technique uses a systematic 'what if' questioning approach structured around guide words like NO, MORE, LESS, and REVERSE?

Fault Tree Analysis (FTA)
Failure Mode and Effects Analysis (FMEA)
Preliminary Hazard Analysis (PrHA)
Hazard and Operability Study (HAZOP) (Correct answer)

Correct answer: Hazard and Operability Study (HAZOP)

HAZOP uses standardized guide words applied to process parameters to systematically identify deviations from design intent that could create hazards.

Question 85: A facility stores both regulated medical waste and RCRA hazardous waste. Which statement about commingling these waste streams is correct?

Mixing regulated medical waste with RCRA hazardous waste makes the entire mixture subject to RCRA hazardous waste regulations (Correct answer)
Commingling is permitted in satellite accumulation areas but not in 90-day storage areas
Medical waste regulations supersede RCRA, so RCRA standards apply only to the hazardous portion
Commingling is allowed if a single manifest covers all materials

Correct answer: Mixing regulated medical waste with RCRA hazardous waste makes the entire mixture subject to RCRA hazardous waste regulations

If regulated medical waste is mixed with RCRA hazardous waste, the mixture is regulated as RCRA hazardous waste and all RCRA storage requirements apply.

Question 86: The Emergency Response Guidebook (ERG) is primarily used to:

Train hazmat employees on packaging requirements
Guide first responders during the initial phase of a hazmat transportation incident (Correct answer)
Calculate reportable quantities for spills
Classify waste under RCRA

Correct answer: Guide first responders during the initial phase of a hazmat transportation incident

The ERG provides first responders with guidance on initial protective actions and hazard identification during the first 30 minutes of a hazmat incident.

Question 87: Which of the following best defines 'source reduction' under the Pollution Prevention Act?

Recycling hazardous waste on-site before disposal
Treating hazardous waste to reduce its volume at the point of generation
Any practice that reduces the amount or toxicity of waste entering the waste stream prior to recycling or treatment (Correct answer)
Diverting waste to beneficial reuse programs at downstream facilities

Correct answer: Any practice that reduces the amount or toxicity of waste entering the waste stream prior to recycling or treatment

Source reduction specifically means reducing the volume or toxicity of waste before it enters the waste stream, excluding recycling, treatment, or disposal activities.

Question 88: Under DOT 49 CFR Part 171, who is responsible for preparing the shipping paper (hazardous materials description) for a hazardous waste shipment?

The transporter
The generator (offeror) (Correct answer)
The state hazmat coordinator
The receiving TSD facility

Correct answer: The generator (offeror)

The generator, as the offeror of the hazardous material, is responsible for preparing accurate shipping papers including the proper DOT description.

Question 89: During a chemical emergency response, an incident commander notices a greenish-yellow vapor cloud. Which chemical is MOST likely responsible?

Hydrogen sulfide
Ammonia
Carbon monoxide
Chlorine gas (Correct answer)

Correct answer: Chlorine gas

Chlorine gas has a distinctive greenish-yellow color and a sharp, bleach-like odor, making visual identification possible during releases.

Question 90: Which record must accompany a hazardous waste shipment that is subject to Land Disposal Restrictions?

A copy of the facility's RCRA permit
A signed generator certification and waste characterization notice sent to the receiving facility (Correct answer)
A state-issued transport authorization
An EPA waste code determination letter

Correct answer: A signed generator certification and waste characterization notice sent to the receiving facility

LDR regulations require generators to send a one-time written notice and certification to the receiving TSD facility documenting that waste meets treatment standards.

Question 91: When labeling an acute hazardous waste container at a large quantity generator facility, what is the maximum allowable accumulation time before the container must be moved to an approved storage area?

1 day (Correct answer)
3 days
10 days
30 days

Correct answer: 1 day

Acute hazardous wastes (P-listed) must be moved from satellite accumulation areas to the central storage area within 1 day of reaching the container limit.

Question 92: Under the Clean Air Act, National Emission Standards for Hazardous Air Pollutants (NESHAPs) regulate emissions of which category of pollutants?

Hazardous air pollutants (HAPs) such as benzene and mercury (Correct answer)
Criteria pollutants like PM2.5 and ozone
Radioactive materials from nuclear plants
Greenhouse gases including CO2 and methane

Correct answer: Hazardous air pollutants (HAPs) such as benzene and mercury

NESHAPs set emission standards for HAPs, which are air pollutants known or suspected to cause cancer or other serious health effects.

Question 93: A HAZWOPER site worker who has not worked at a hazardous waste site for 12 months must complete:

40-hour initial training
24-hour initial training
8-hour annual refresher training (Correct answer)
16-hour site-specific training

Correct answer: 8-hour annual refresher training

29 CFR 1910.120(e)(8) requires all HAZWOPER-trained workers to complete 8 hours of annual refresher training to maintain certification.

Question 94: The National Response Framework (NRF) Emergency Support Function #10 (ESF #10) is specifically assigned to coordinate:

Search and rescue operations at hazmat incidents
Public health and medical services
Oil and hazardous materials response (Correct answer)
Environmental protection and debris removal

Correct answer: Oil and hazardous materials response

ESF #10 coordinates federal oil and hazardous materials response activities under the NRF, led by EPA with USCG as co-lead.

Question 95: Which regulatory program under RCRA requires permitted hazardous waste treatment, storage, and disposal facilities (TSDFs) to investigate and address releases from solid waste management units?

Corrective action program (Correct answer)
Biennial reporting system
Land disposal restrictions
Hazardous waste minimization program

Correct answer: Corrective action program

RCRA's corrective action program (40 CFR Part 264 Subpart S) requires TSDFs to clean up hazardous releases from all solid waste management units at the facility.

Question 96: Which marking is required on a non-bulk package containing a hazardous material?

Date of manufacture
Shipper's EIN number
Proper shipping name and UN identification number (Correct answer)
Receiver's DUNS number

Correct answer: Proper shipping name and UN identification number

Non-bulk packages must be marked with the proper shipping name and UN/NA identification number per 49 CFR 172.301.

Question 97: When excavating contaminated soil near a property boundary, which engineering control is most commonly used to prevent dust migration offsite?

Soil vapor extraction
Wind breaks and water misting systems (Correct answer)
Permeable reactive barriers
Groundwater extraction

Correct answer: Wind breaks and water misting systems

Water misting and wind breaks suppress fugitive dust during excavation operations, protecting neighboring receptors and complying with air quality requirements.

Question 98: A facility generates a waste solvent mixture containing trichloroethylene (TCE). Under RCRA, this waste would most likely be classified as which type of listed hazardous waste?

P030
K051
F001 (Correct answer)
U001

Correct answer: F001

F001 covers spent halogenated solvents including TCE used in degreasing operations.

Question 99: Which section of the Hazardous Materials Table (49 CFR 172.101) provides the special provisions applicable to a material?

Column 9
Column 5
Column 7 (Correct answer)
Column 3

Correct answer: Column 7

Column 7 of the Hazardous Materials Table lists the special provision numbers that modify or supplement general requirements for that specific material.

Question 100: The Hazardous and Solid Waste Amendments (HSWA) of 1984 added which significant requirement to RCRA?

Stormwater permitting for industrial facilities
National ambient air quality standards for hazardous air pollutants
Land disposal restrictions (LDRs) for untreated hazardous waste (Correct answer)
Mandatory recycling of all industrial waste

Correct answer: Land disposal restrictions (LDRs) for untreated hazardous waste

HSWA introduced land disposal restrictions, requiring treatment of hazardous waste to meet specific standards before land disposal.

Question 101: Which federal regulation requires facilities with aboveground storage tanks (ASTs) above threshold quantities to have a Spill Prevention, Control, and Countermeasure (SPCC) Plan?

40 CFR Part 264
40 CFR Part 112 (Correct answer)
49 CFR Part 173
29 CFR 1910.106

Correct answer: 40 CFR Part 112

40 CFR Part 112 requires SPCC plans for facilities with oil storage above threshold quantities to prevent discharges to navigable waters.

Question 102: Which waste code category covers wastes from specific industries such as petroleum refining and wood preserving?

K-listed wastes (Correct answer)
P-listed wastes
U-listed wastes
F-listed wastes

Correct answer: K-listed wastes

K-listed wastes are source-specific hazardous wastes generated by specific industrial processes such as petroleum refining, wood preserving, and inorganic chemical production.

Question 103: The ISO 14001 standard is relevant to pollution prevention because it:

Sets numeric emission limits for industrial air pollutants
Provides a framework for establishing an Environmental Management System to improve environmental performance systematically (Correct answer)
Specifies approved analytical methods for hazardous waste characterization
Certifies facilities that have achieved zero-waste status

Correct answer: Provides a framework for establishing an Environmental Management System to improve environmental performance systematically

ISO 14001 provides a voluntary framework for an Environmental Management System (EMS) that helps organizations continually improve environmental performance, including pollution prevention initiatives.

Question 104: In risk assessment, what is the 'hazard quotient' (HQ) used to evaluate?

The financial cost of a hazardous chemical release
Non-cancer risk from a single chemical by comparing exposure to a reference dose (Correct answer)
The probability of a catastrophic explosion
The cancer risk from carcinogenic chemicals

Correct answer: Non-cancer risk from a single chemical by comparing exposure to a reference dose

The hazard quotient is the ratio of estimated exposure to the reference dose (RfD or RfC); an HQ greater than 1 suggests potential non-cancer health concern.

Question 105: Which regulation requires facilities with threshold quantities of regulated substances to develop Risk Management Plans (RMPs)?

OSHA PSM Standard (29 CFR 1910.119)
EPA RMP Rule (40 CFR Part 68) (Correct answer)
DOT HMR 49 CFR 172
EPCRA Title III

Correct answer: EPA RMP Rule (40 CFR Part 68)

EPA's RMP rule under CAA Section 112(r) requires facilities with regulated substances above threshold quantities to develop and submit RMPs to the EPA.

Question 106: The Oil Pollution Act of 1990 (OPA 90) primarily applies to spills of oil into which environment?

Navigable waters and adjoining shorelines (Correct answer)
Hazardous waste landfills
Publicly owned treatment works
Groundwater aquifers only

Correct answer: Navigable waters and adjoining shorelines

OPA 90 addresses liability, compensation, and cleanup of oil spills into navigable waters, along shorelines, and in the exclusive economic zone.

Question 107: During a tabletop exercise for hazardous materials response planning, the primary objective is to:

Discuss roles, responsibilities, and decision-making in a low-stress environment (Correct answer)
Test the physical fitness of hazmat team members under stress
Deploy actual responders and equipment to simulate field conditions
Measure response times from initial notification to scene arrival

Correct answer: Discuss roles, responsibilities, and decision-making in a low-stress environment

Tabletop exercises are discussion-based and focus on clarifying roles, plans, and coordination without deploying personnel or equipment in the field.

Question 108: What is the primary purpose of a Job Hazard Analysis (JHA) in occupational health and safety?

To document employee training completion records
To assign workers compensation claims to specific incidents
To systematically identify hazards associated with each step of a job task (Correct answer)
To determine the root cause of accidents after they occur

Correct answer: To systematically identify hazards associated with each step of a job task

A JHA breaks a job into steps, identifies hazards at each step, and recommends controls before work begins — a proactive prevention tool.

Question 109: Under EPCRA Section 302, which criterion triggers a facility's obligation to notify the SERC and LEPC about an Extremely Hazardous Substance (EHS)?

Operating within 500 feet of a residential zone
Employing more than 10 workers who handle the substance
Releasing more than 1 pound into the environment
Exceeding the Threshold Planning Quantity (TPQ) (Correct answer)

Correct answer: Exceeding the Threshold Planning Quantity (TPQ)

Facilities must notify the SERC and LEPC within 60 days of first receiving or producing an EHS in quantities at or above the Threshold Planning Quantity.

Question 110: An employee receives a whole-body radiation dose of 5 rem in a single calendar year from occupational exposure. This is:

At the NRC annual occupational dose limit for whole-body exposure (Correct answer)
Above the NRC limit requiring immediate investigation
Below the NRC limit but above the ALARA goal
An acceptable dose with no recordkeeping required

Correct answer: At the NRC annual occupational dose limit for whole-body exposure

NRC regulations (10 CFR 20) set the annual occupational whole-body dose limit at 5 rem (50 mSv), so 5 rem is exactly at the regulatory limit.

Question 111: What is the purpose of a 'contingency plan' required for large quantity generator hazardous waste storage areas?

To outline procedures for managing waste when storage capacity is exceeded
To describe emergency response actions for fires, explosions, or unplanned releases (Correct answer)
To provide backup labeling procedures if original labels are lost
To schedule routine container inspections and aisle maintenance

Correct answer: To describe emergency response actions for fires, explosions, or unplanned releases

The contingency plan required under 40 CFR 265 Subpart D describes emergency response procedures for fires, explosions, and unplanned releases of hazardous waste.

Question 112: A facility manager is reviewing a chemical's SDS and notes a vapor density of 1.8 (air = 1.0). This physical property indicates that the vapor will most likely do what in the facility?

Dissolve rapidly in ambient humidity
Disperse uniformly throughout the room
Sink and accumulate in low-lying areas and confined spaces (Correct answer)
Rise and accumulate near the ceiling

Correct answer: Sink and accumulate in low-lying areas and confined spaces

Vapors with density greater than 1.0 are heavier than air and will settle in pits, trenches, and floor-level confined spaces.

Question 113: Which OSHA standard requires employers to develop a written emergency action plan when employees may be exposed to hazardous materials emergencies?

29 CFR 1910.1200
29 CFR 1910.38 (Correct answer)
29 CFR 1910.132
29 CFR 1910.119

Correct answer: 29 CFR 1910.38

29 CFR 1910.38 (Emergency Action Plans) requires employers to establish written plans addressing evacuation, emergency reporting, and employee roles during emergencies.

Question 114: Pyrophoric materials must be stored under which conditions to prevent ignition?

In a locked outdoor storage shed
In a flammable storage cabinet with ventilation
Under an inert atmosphere or in sealed containers away from air and moisture (Correct answer)
In a refrigerated unit set below 40°F

Correct answer: Under an inert atmosphere or in sealed containers away from air and moisture

Pyrophoric materials ignite spontaneously on contact with air and must be stored under inert gas or in sealed, air-free containers.

Question 115: In industrial hygiene, the term 'action level' under OSHA standards typically represents:

The IDLH concentration, requiring evacuation
The STEL averaged over 15 minutes
The PEL itself, requiring immediate corrective action
One-half the PEL, triggering additional monitoring and medical surveillance (Correct answer)

Correct answer: One-half the PEL, triggering additional monitoring and medical surveillance

OSHA action levels (typically ½ PEL) trigger requirements for additional exposure monitoring, recordkeeping, and medical surveillance.

Question 116: During a risk assessment, 'sensitive receptors' are important to identify because they represent which group?

Emergency responders who may contact hazardous releases
Industrial workers with the highest chemical exposures
Populations or locations with heightened vulnerability to adverse effects (Correct answer)
Chemical storage areas nearest to populated areas

Correct answer: Populations or locations with heightened vulnerability to adverse effects

Sensitive receptors include groups such as children, the elderly, and individuals with pre-existing health conditions who face greater risk from the same level of chemical exposure.

Question 117: Which type of groundwater model is most appropriate for predicting the long-term migration of a dissolved contaminant plume in a heterogeneous aquifer?

Conceptual site model without quantitative predictions
Statistical regression model based on monitoring data alone
Analytical model assuming homogeneous, isotropic conditions
Numerical flow and transport model incorporating site-specific heterogeneity (Correct answer)

Correct answer: Numerical flow and transport model incorporating site-specific heterogeneity

Numerical models discretize the aquifer into cells that can represent spatial variability in hydraulic conductivity and other parameters affecting contaminant transport.

Question 118: Under RCRA, a large quantity generator (LQG) may accumulate hazardous waste on-site for a maximum of how many days without a permit?

180 days
90 days (Correct answer)
30 days
60 days

Correct answer: 90 days

LQGs may accumulate hazardous waste on-site for up to 90 days without obtaining a storage permit.

Question 119: Which of the following CERCLA hazardous substance releases is exempt from NRC notification requirements?

A release from a broken storage tank to soil at a manufacturing plant
Federally permitted releases such as those covered by a valid NPDES permit (Correct answer)
A release in a populated area above the reportable quantity
A release discovered during an OSHA inspection

Correct answer: Federally permitted releases such as those covered by a valid NPDES permit

CERCLA Section 101(10) exempts 'federally permitted releases' such as those authorized under NPDES, RCRA, or Clean Air Act permits from notification requirements.

Question 120: When a facility conducts a Management of Change (MOC) review for replacing a pump seal material in a sulfuric acid service line, which hazard analysis step must be completed BEFORE the change is implemented?

Evaluating whether the new seal material introduces new or different hazards to the process (Correct answer)
Notifying the LEPC of the proposed equipment modification
Obtaining a written variance from OSHA before changing process equipment
Updating the annual Tier II report to reflect the new material

Correct answer: Evaluating whether the new seal material introduces new or different hazards to the process

MOC requires a pre-change hazard evaluation to determine if the change introduces new hazards, before implementation—not after.

Question 121: Which best describes IHMM's role in relation to the CHMM credential after it is awarded?

IHMM has no further role once the credential is issued
IHMM transfers oversight to the credential holder's state environmental agency
IHMM maintains oversight through recertification requirements, a code of ethics, and disciplinary procedures (Correct answer)
IHMM monitors the CHMM's work by reviewing all signed compliance documents

Correct answer: IHMM maintains oversight through recertification requirements, a code of ethics, and disciplinary procedures

IHMM retains ongoing responsibility for the credential through recertification cycles, ethical standards enforcement, and a disciplinary process for violations.

Question 122: Monitored natural attenuation (MNA) relies on which natural processes to reduce contaminant concentrations without active intervention?

Thermal destruction
Biodegradation, dispersion, dilution, sorption, and volatilization (Correct answer)
Excavation and disposal
Chemical oxidation by injected reagents

Correct answer: Biodegradation, dispersion, dilution, sorption, and volatilization

MNA harnesses naturally occurring physical, chemical, and biological processes to reduce contaminant mass, toxicity, mobility, or concentration over time.

Question 123: Under RCRA, what is the maximum accumulation time for large quantity generators (LQGs) before hazardous waste must be shipped off-site?

30 days
90 days (Correct answer)
60 days
180 days

Correct answer: 90 days

LQGs may accumulate hazardous waste on-site for no more than 90 days without a storage permit.

Question 124: Which chemical property is most important when selecting personal protective equipment (PPE) for a hazmat response involving an unknown liquid?

Reactivity with common decontamination agents
The chemical's specific gravity relative to water
The chemical's vapor pressure at ambient temperature
Permeation rate through available suit materials (Correct answer)

Correct answer: Permeation rate through available suit materials

Permeation rate determines how quickly a chemical will penetrate through PPE materials, making it critical for suit selection when the chemical is known.

Question 125: What does the term 'secondary containment' mean in the context of hazardous materials storage?

The use of double-walled containers as the primary storage vessel
A second lock on storage room doors
A containment system designed to capture releases from primary containers or tanks (Correct answer)
A backup labeling system for chemical containers

Correct answer: A containment system designed to capture releases from primary containers or tanks

Secondary containment is a system (such as a dike or berm) that captures spills or leaks from the primary storage container to prevent environmental release.

Question 126: The biological exposure index (BEI) established by ACGIH is best described as:

A legal occupational exposure limit enforced by OSHA
A reference value for evaluating biological specimens to assess worker chemical absorption (Correct answer)
An immediate danger to life and health concentration
A short-term exposure limit averaged over 15 minutes

Correct answer: A reference value for evaluating biological specimens to assess worker chemical absorption

BEIs are ACGIH guidance values for biological monitoring (urine, blood, exhaled air) that correlate with TLV exposures.

Question 127: A facility's waste characterization shows a liquid waste with pH 2.1. Under 40 CFR 261.22, this waste is classified as hazardous due to which characteristic?

Corrosivity (Correct answer)
Reactivity
Ignitability
Toxicity

Correct answer: Corrosivity

A liquid with pH ≤ 2 or ≥ 12.5 exhibits the RCRA corrosivity characteristic.

Question 128: Which type of hazardous waste storage unit requires secondary containment, leak detection, and a liner under 40 CFR Part 264 Subpart J?

Surface impoundment (Correct answer)
Land treatment unit
Waste pile
Container storage area

Correct answer: Surface impoundment

Surface impoundments under 40 CFR 264 Subpart K must have double liners, a leachate collection system, and groundwater monitoring.

Question 129: In a remedial investigation, what is the primary purpose of installing groundwater monitoring wells in a transect downgradient of the source area?

To delineate the contaminant plume extent and direction (Correct answer)
To collect surface water samples
To measure soil gas concentrations
To inject remediation reagents

Correct answer: To delineate the contaminant plume extent and direction

Downgradient transect wells define the lateral and vertical extent of the dissolved-phase plume, confirming contaminant migration pathways.

Question 130: A facility is evaluating whether to install a fixed gas detection system in a chemical storage room. Which NFPA standard provides guidance on detector placement and alarm setpoints for flammable gas and vapor detection?

NFPA 72
NFPA 72 combined with API RP 505 (Correct answer)
NFPA 72A
NFPA 30

Correct answer: NFPA 72 combined with API RP 505

NFPA 72 addresses the fire alarm system infrastructure while API RP 505 provides specific guidance on flammable gas detector placement and alarm thresholds in facilities.

Question 131: Under 40 CFR Part 262, which document must accompany a hazardous waste shipment from the generator to the treatment, storage, or disposal facility?

Bill of lading
Material Safety Data Sheet
Uniform Hazardous Waste Manifest (Correct answer)
Certificate of Disposal

Correct answer: Uniform Hazardous Waste Manifest

The Uniform Hazardous Waste Manifest is the tracking document required by RCRA to follow hazardous waste from its point of generation to final disposal.

Question 132: A permeable reactive barrier (PRB) using zero-valent iron (ZVI) remediates chlorinated solvents primarily through which mechanism?

Adsorption onto activated carbon
Reductive dechlorination via electron donation from iron (Correct answer)
Volatilization to atmosphere
Oxidation by permanganate

Correct answer: Reductive dechlorination via electron donation from iron

ZVI donates electrons to chlorinated compounds, causing reductive dechlorination that breaks chlorine-carbon bonds and produces less-toxic or non-toxic daughter products.

Question 133: Following a minor chemical spill that resulted in no injuries, a health and safety manager launches an incident investigation. What is the most important objective of this investigation?

To calculate the total cost of the spill cleanup and lost material.
To discipline the employee responsible for the spill.
To determine the root causes of the spill to prevent a recurrence. (Correct answer)
To complete the OSHA 301 Injury and Illness Incident Report.

Correct answer: To determine the root causes of the spill to prevent a recurrence.

The primary purpose of an incident investigation is to identify the root causes of an event to implement corrective actions and prevent similar incidents from happening in the future. Effective investigations focus on prevention and system improvements rather than assigning blame.

Question 134: What does OSHA's 'General Duty Clause' (Section 5(a)(1) of the OSH Act) require of employers?

Maintain OSHA 300 logs for all recordable injuries
Post OSHA notices in a prominent workplace location
Provide a workplace free from recognized hazards likely to cause death or serious harm (Correct answer)
Conduct annual workplace safety audits

Correct answer: Provide a workplace free from recognized hazards likely to cause death or serious harm

The General Duty Clause requires employers to provide a workplace free from recognized serious hazards even when no specific OSHA standard applies.

Question 135: A CHMM provides expert testimony in litigation involving hazardous waste contamination. Which ethical principle is most directly implicated?

Prohibition on working for regulatory agencies
Requirement to obtain IHMM pre-approval for all testimony
Objectivity and truthfulness when providing professional opinions (Correct answer)
Confidentiality of client financial records

Correct answer: Objectivity and truthfulness when providing professional opinions

Providing expert testimony requires the CHMM to be objective and truthful, a core ethical obligation that supersedes advocacy for any party.

Question 136: A tank farm facility experiences a spill of a listed hazardous substance that reaches a navigable waterway. Under CERCLA Section 103 and 40 CFR Part 302, notification to the NRC is required when the quantity released equals or exceeds the:

Threshold planning quantity (TPQ)
Reportable Quantity (RQ) (Correct answer)
Permissible exposure limit (PEL)
Immediately dangerous to life or health (IDLH) value

Correct answer: Reportable Quantity (RQ)

CERCLA requires immediate notification to the NRC when a hazardous substance release equals or exceeds its Reportable Quantity.

Question 137: The CHMM candidate should know that the National Response Center (NRC) must be notified of a hazmat release when:

A spill occurs only in a navigable waterway
A state agency has already been notified
The quantity released equals or exceeds the CERCLA reportable quantity for that substance (Correct answer)
Any amount of a regulated material is spilled regardless of quantity

Correct answer: The quantity released equals or exceeds the CERCLA reportable quantity for that substance

CERCLA Section 103 and EPCRA Section 304 require NRC notification when a hazardous substance release meets or exceeds its reportable quantity (RQ).

Question 138: An employer provides initial and recurrent DOT hazardous materials training to its employees. According to 49 CFR §172.704, which of the following is NOT a required component of a hazmat employee's training record?

A copy or description of the training materials used.
The employee's specific score on the final training assessment. (Correct answer)
The completion date of the most recent training.
The hazmat employee's name.

Correct answer: The employee's specific score on the final training assessment.

While 49 CFR §172.704(d) requires a certification that the employee was trained and tested, it does not mandate that the specific test score be part of the retained record. The record must include the employee's name, training completion date, a description of the materials, and the trainer's information.

Question 139: A facility manager discovers that drums containing hazardous waste have been stored in a satellite accumulation area (SAA) for more than 60 days. Under 40 CFR 262.15, this situation most likely indicates a violation because:

SAAs require a RCRA storage permit after 30 days
Drums at an SAA must be moved to the central accumulation area once the container limit is reached, regardless of time (Correct answer)
The 60-day limit applies only to large quantity generators in attainment areas
SAAs are exempt from all time limits under EPA regulations

Correct answer: Drums at an SAA must be moved to the central accumulation area once the container limit is reached, regardless of time

SAAs are not subject to time limits per se, but containers must be moved once the volume limit (55 gallons for non-acute, 1 quart for acute) is reached—a long accumulation time suggests containers have exceeded limits.

Question 140: Under 49 CFR, when must a HAZMAT placard be replaced or re-displayed after it is damaged or becomes illegible?

At the next scheduled maintenance
Within 24 hours of the damage
Only when directed by a DOT inspector
Before the vehicle is moved again (Correct answer)

Correct answer: Before the vehicle is moved again

Damaged or illegible placards must be replaced before the vehicle continues in transportation to maintain required hazard communication.

Certified Hazardous Materials Manager (CHMM)

The CHMM examination, administered by the Institute of Hazardous Materials Management (IHMM), evaluates minimal competency in hazardous materials management across 12 content domains covering planning, transportation, storage, regulatory compliance, remediation, and health and safety. Candidates must achieve a scaled score of 700 out of 1000 to earn certification.

140

Questions

180 min

Time Limit

70%

To Pass

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