Sheet 33Mix-up sheet · HazCom, respirators and sanitation
HazCom on the STSC: SDS sections, signal words, pictograms
The Hazard Communication Standard reaches construction through 29 CFR 1926.59, which applies the general-industry rule at 29 CFR 1910.1200. It gives a crew three tools that work together: a label on the container, a 16-section safety data sheet (SDS) behind it, and training that ties both to the work.
The name or number that matches the container to its SDS.
Signal word
DANGER or WARNING, one per label. DANGER is kept for the more serious hazard categories.
Hazard statement
A fixed phrase for each hazard class and category, such as "Causes serious eye damage".
Pictogram
A black symbol inside a diamond with a red border, one per type of hazard. OSHA requires eight of the nine pictograms of the Globally Harmonized System (GHS); the environmental one is optional.
Precautionary statement
What to do about it: prevention, response, storage and disposal.
Responsible party
Name, U.S. address and phone number of the manufacturer, importer or other responsible party.
Talking point 02
Label and sheet cards
Short cards on what each label element means, longer ones that bring a product onto the site and ask what the supervisor does next.
Card 1 of 6 · 0 right
Card 1
Which GHS pictogram on a construction product's label warns of a chronic health hazard such as carcinogenicity or respiratory sensitization?
Pick an answer. A short note for each option, A to D, appears here.
ASkull and crossbones marks acute toxicity, meaning harm that can be fatal or toxic after short-term exposure.
BThe exclamation mark covers irritants, skin sensitizers and less severe acute effects, not chronic health hazards.
CThe corrosion pictogram marks skin burns, serious eye damage and corrosion of metals.
DCorrect: the health hazard pictogram, a silhouette with a starburst on the chest, covers chronic effects such as carcinogenicity and respiratory sensitization.
Card 2
A supervisor finds a jug of muriatic acid on the same shelf as a bleach-based cleaner in a job-site storage container. What is the PRIMARY hazard of this arrangement?
Pick an answer. A short note for each option, A to D, appears here.
ACorrect: hypochlorite bleach and muriatic acid are incompatible, and mixing them releases toxic chlorine gas.
BNeither product is flammable, so ignition is not the concern with this pairing.
CShelf corrosion is a minor property issue compared with a toxic gas release.
DMixing does not simply weaken the acid; the reaction produces a dangerous gas, which is the real hazard.
Card 3
Several workers report skin irritation after the crew started using a new cleaning solvent. What should the supervisor do FIRST?
Pick an answer. A short note for each option, A to D, appears here.
ACorrect: Symptoms in several workers show exposure is not controlled, so use stops, affected workers get care, and the SDS guides both treatment and restart.
BWaiting for more cases lets the uncontrolled exposure continue and harms additional workers.
CGloves may help eventually, but the right material comes from the SDS, and continued use keeps the exposure going.
DAn unreviewed substitute may carry the same or worse hazards; the replacement also needs an SDS review before use.
Card 4
A crew will spray a solvent-based sealer on the walls of an enclosed basement mechanical room. What is the supervisor's FIRST industrial hygiene step?
Pick an answer. A short note for each option, A to D, appears here.
AAn open door does not assure adequate ventilation for spraying solvents in an enclosed room.
BRespirators require a hazard evaluation, medical clearance and fit testing first, and the right cartridge depends on the vapor.
CWaiting for symptoms is reactive; industrial hygiene evaluates the exposure before work begins.
DCorrect: Industrial hygiene starts by anticipating and evaluating the hazard, and the SDS gives the chemical, its limits and the needed controls.
Card 5
When implementing a hazard communication program, what is the most important element to ensure worker comprehension?
Pick an answer. A short note for each option, A to D, appears here.
ASDSs must be accessible, but where they are stored does not make anyone understand the hazards.
BA signature shows receipt, not understanding.
CSigns alert people, but they do not teach the hazards and precautions the standard requires.
DCorrect: HazCom training only works if it is given in a language and manner the workers understand.
Card 6
A painting subcontractor will spray a coating on a floor where an electrical crew from another company is also working. Under the Hazard Communication Standard, what must the painting contractor provide to the electrical contractor?
Pick an answer. A short note for each option, A to D, appears here.
AEach employer trains its own crew, but the employer bringing the chemical must share the SDS and precautions so the others can.
BCorrect: The painting contractor gives the other employer access to the SDS and tells it the precautions and labeling its workers need.
CFit-test records are about the painters' own respirators. They tell the electricians nothing about the coating's hazards.
DA statement cannot replace the SDS, and a coating whose label shows hazards cannot simply be declared safe.
Talking point 03
The SDS, section by section
Safety data sheet sections in their fixed order, 29 CFR 1910.1200(g)scroll →
Section
Title
Open it when
1
Identification
You need the supplier or its emergency phone number
2
Hazard(s) identification
You want the hazard class and label elements in one place
3
Composition
Someone asks what is actually in the product
4
First-aid measures
Exposure has already happened
5
Fire-fighting measures
You are choosing an extinguishing agent
6
Accidental release measures
A spill has to be contained and cleaned up
7
Handling and storage
You are deciding where it is kept and what it must be kept apart from
8
Exposure controls/personal protection
You are picking ventilation and PPE, or checking an exposure limit
9
Physical and chemical properties
You need the flash point, odor or appearance
10
Stability and reactivity
You need to know what it reacts with
11
Toxicological information
You want the routes of exposure, symptoms and long-term effects
12–15
Ecological, disposal, transport, regulatory
Required for GHS consistency; OSHA does not enforce them
16
Other information
You are checking the date of the last revision
Sections 2, 4, 7, 8 and 11 are the ones a supervisor reaches for most.
Talking point 04
Edge cases the standard settles
Three physical-hazard symbols sit close together. A plain flame marks flammables; a flame over a circle marks oxidizers, which feed a fire without burning themselves; an exploding bomb marks explosives and self-reactive products. Health effects have their own symbols, split between acute harm and long-term harm such as cancer, so one product can carry both kinds.
Training is due when a worker is first assigned and again whenever a new chemical hazard enters the work area. The rule has no annual refresher. A company may schedule one, but calling it an OSHA requirement is wrong.
Decanting creates a new container. Solvent poured into a spray bottle needs a workplace label with the product identifier and enough words, pictures or symbols to give the general hazard, unless the bottle is only for the immediate use of the worker who filled it. Either way, the SDS stays reachable for the crew in the work area on every shift.