OSHA requirements for a small fiberglass fabrication shop

Last updated 2026-07-11

Which OSHA standards actually apply to a fiberglass fabrication shop?

Fiberglass fabrication sits in OSHA's General Industry standards (29 CFR 1910), not construction. That matters. The two rule sets carry different thresholds, training requirements, and recordkeeping triggers. If your shop makes parts, boats, tanks, tubs, or custom panels using open-mold or closed-mold layup, you are a general industry employer.

The standards that come up in nearly every fiberglass shop inspection are:

• 29 CFR 1910.1000 (Air Contaminants) for styrene, acetone, methyl ethyl ketone (MEK), and other solvent vapors ^[1]
• 29 CFR 1910.134 (Respiratory Protection) when engineering controls alone cannot keep exposures below permissible exposure limits (PELs) ^[2]
• 29 CFR 1910.1200 (Hazard Communication) for your SDS library, labeling, and worker training ^[3]
• 29 CFR 1910.132 through 1910.138 (Personal Protective Equipment) for gloves, eye protection, and skin protection ^[4]
• 29 CFR 1910.94 (Ventilation) if you spray resins or gel coats ^[5]
• 29 CFR 1904 (Recordkeeping) if you have 10 or more employees, or if your shop is in a specifically regulated industry code ^[6]
• 29 CFR 1910.147 (Lockout/Tagout) for any machinery servicing, including routers, trimmers, and CNC equipment ^[7]

That list runs longer than most shop owners expect. Styrene exposure is the single biggest compliance driver in open-mold fiberglass work, and it touches almost every other standard on the list.

What are the OSHA exposure limits for styrene and other fiberglass shop chemicals?

Styrene is the chemical most tied to fiberglass fabrication. It is the monomer in polyester and vinyl ester resins, and it evaporates fast at room temperature during hand layup, spray-up, and gel coat application.

OSHA's permissible exposure limit (PEL) for styrene under 29 CFR 1910.1000 Table Z-2 is 100 ppm as an 8-hour time-weighted average (TWA), with a ceiling of 200 ppm and a maximum peak of 600 ppm for any 5-minute period in any 3-hour period ^[1]. NIOSH recommends a much lower limit of 50 ppm TWA, but the legally enforceable federal PEL stays at 100 ppm as of 2025 ^[13].

Other chemicals you will see in a typical fiberglass shop, with their OSHA PELs from 29 CFR 1910.1000 Table Z-1:

Chemical	OSHA PEL (8-hr TWA)	NIOSH REL	Common source
Styrene	100 ppm	50 ppm	Polyester/vinyl ester resin
Acetone	1,000 ppm	250 ppm	Cleanup solvent
Methyl ethyl ketone (MEK)	200 ppm	200 ppm	Cleanup solvent
MEKP (as catalyst vapor)	See SDS; no specific OSHA PEL	Treat as organic peroxide	Resin catalyst
Fiberglass dust (nuisance)	15 mg/m³ (total); 5 mg/m³ (respirable)	Same	Grinding, trimming, sanding
Cobalt naphthenate (accelerator)	0.1 mg/m³ as Co	0.05 mg/m³ as Co	Gel coat promoter

Here is the practical problem for most small shops. Open-mold spray-up operations routinely push styrene levels well above 100 ppm near the operator's breathing zone without good local exhaust ventilation ^[8]. Industrial hygiene sampling, even a basic grab sample with a direct-reading instrument, is the only way to know where you stand.

MEKP (methyl ethyl ketone peroxide) deserves separate attention. It is a Class I organic peroxide and a serious skin and eye hazard. OSHA has cited shops under the general duty clause (Section 5(a)(1) of the OSH Act) for inadequate MEKP storage and handling controls even when no specific PEL is exceeded, because the SDS for most MEKP products warns against skin contact and spells out ventilation requirements ^[3].

Does a small fiberglass shop need a written respiratory protection program?

Yes, if you require employees to wear any type of respirator, including a half-face air-purifying respirator with organic vapor cartridges. The requirement sits in 29 CFR 1910.134(c): "Where respirator use is required, the employer shall establish and implement a written respiratory protection program with worksite-specific procedures" ^[2].

That written program has to cover, at minimum: procedures for selecting respirators, medical evaluations (required before a worker is fit-tested or uses a tight-fitting respirator), fit testing, use procedures, maintenance and storage, air quality for supplied-air systems, training, and program evaluation.

A few things shops get wrong here. Even if you call respirator use "voluntary," you still carry obligations under 1910.134(c)(2): you must give workers Appendix D of the standard (the OSHA guide on voluntary use) and make sure the respirator itself does not create a hazard. A surgical mask or paper dust mask does nothing against styrene vapors. Organic vapor cartridge respirators rated for styrene are the floor, and the cartridges have a service life that shifts with concentration and humidity. A written program has to address cartridge change-out schedules.

Medical evaluation is the step most small shops skip. OSHA requires it before fit testing, using a questionnaire approved by a licensed health care professional. The questionnaire lives in Appendix C of 29 CFR 1910.134. Many occupational health clinics handle it for under $50 per employee, and it is not optional.

What PPE is required for fiberglass fabrication workers?

29 CFR 1910.132(d) requires employers to run a written hazard assessment before selecting PPE. The assessment documents what physical, chemical, and other hazards exist and what protection answers each one. If you have never done one for your shop, that written assessment is where to start ^[4].

For a typical open-mold fiberglass operation the PPE picture usually looks like this:

• Eyes and face: Chemical splash goggles (more than safety glasses) when mixing or pouring resin, MEKP, or acetone. A face shield over the goggles during spray operations. ANSI Z87.1-rated.
• Skin: Nitrile gloves (minimum 8 mil for resin work; styrene permeates thin latex gloves fast). Long sleeves or a Tyvek sleeve to cut skin sensitization from fiberglass strands and resin. Styrene is a skin sensitizer with repeated contact.
• Feet: Chemical-resistant footwear. Open-toe shoes or canvas sneakers around resin solvents are a citation waiting to happen.
• Respiratory: As covered above, an appropriate air-purifying respirator with organic vapor/P100 combination cartridges for most spray and layup tasks, or a powered air-purifying respirator (PAPR) when styrene concentrations run high enough that cartridge service life gets impractical.

OSHA requires the employer to provide PPE at no cost to employees under 29 CFR 1910.132(h). Respirators provided at the employer's request are included in that rule. The no-cost requirement has been in effect since 2008.

What ventilation does OSHA require in a fiberglass spray booth or layup area?

If your shop sprays gel coat or resin with any type of spray gun, OSHA's ventilation standard at 29 CFR 1910.94 applies ^[5]. Section 1910.94(c) covers spray finishing operations and requires spray areas to be ventilated so solvent vapor stays below 25% of the lower explosive limit (LEL) of the material being sprayed. This is a fire and explosion control requirement first, a health one second.

For health control, the goal is keeping styrene and other vapor concentrations below PELs at the worker's breathing zone. OSHA's general ventilation guidance, and the ACGIH Industrial Ventilation Manual that inspectors often reference, points to local exhaust ventilation (LEV) that captures vapors at the source instead of diluting them across the whole shop. A downdraft or crossdraft spray booth with adequate face velocity (typically 100 feet per minute across the booth face for open-face booths) is the standard approach.

Hand layup without spraying usually relies on general dilution ventilation, but it has to move enough air to actually drop styrene below 100 ppm. Many shops underestimate how much air movement that takes. A rough calculation using ACGIH methods (resin usage rate and room volume) is the starting point. Air monitoring is the only way to confirm compliance.

One more thing that matters. Spray booths must be built of non-combustible materials, run approved electrical systems (explosion-proof or intrinsically safe fixtures), and keep ignition sources out of the spray area. Those are both OSHA 1910.94 and NFPA 33 requirements.

What does OSHA's Hazard Communication standard require for a fiberglass shop?

29 CFR 1910.1200 is the standard most small shops either half-comply with or get wrong in ways that draw citations. The rule requires four things: a written Hazard Communication program, a Safety Data Sheet (SDS) for every hazardous chemical on-site, proper labeling on all containers, and documented employee training ^[3].

In a fiberglass shop, the SDS library usually covers polyester resin, vinyl ester resin, epoxy resin (if used), MEKP catalyst, cobalt naphthenate accelerator, styrene monomer (if added separately), gel coat, acetone, MEK, fiberglass mat and woven roving (yes, fiber glass has an SDS too), mold release agents, and grinding wheels. Most shops carry 15 to 30 chemicals that need SDSs.

Labeling is where day-to-day compliance falls apart. Every secondary container (squeeze bottles, spray bottles, buckets decanted from drums) must carry the product name and appropriate hazard warnings. Unlabeled containers are one of the most common HazCom citations written.

Employee training has to cover what the HazCom standard requires, how to read an SDS (the GHS 16-section format), how to read pictograms and signal words, and the specific hazards of the chemicals in your shop. Training happens before initial assignment and again when a new hazard shows up. You need records of who was trained and when.

For more on building a written HazCom program, see our guide to hazard communication. If you want a faster path to a complete written program, SafetyFolio generates a shop-specific HazCom program in about 15 minutes using your chemical inventory as the input.

What OSHA recordkeeping rules apply to a small fiberglass shop?

OSHA's injury and illness recordkeeping rules (29 CFR 1904) require employers with 10 or more employees in most industries to keep an OSHA 300 Log, complete an OSHA 301 Incident Report for each recordable case, and post the OSHA 300A Summary from February 1 through April 30 each year ^[6].

Shops with fewer than 10 employees at all times during the previous calendar year are partially exempt from routine 1904 recordkeeping. They are never exempt from reporting. Any work-related fatality must be reported to OSHA within 8 hours, and any in-patient hospitalization, amputation, or loss of an eye must be reported within 24 hours, regardless of company size.

Fiberglass shops fall under NAICS codes that vary by product (boats under 336612, bath fixtures under 327910 or 337110, custom fabrication under 332322 or 326199). Some codes qualify for the partial recordkeeping exemption even above 10 employees if OSHA has designated them low-hazard. Check the OSHA website's industry list to confirm your specific NAICS code status, because fiberglass fabrication is rarely treated as low-hazard.

For more on completing OSHA injury reports correctly, see our incident report guide.

Does a fiberglass shop need a lockout/tagout program?

Yes, if anyone in the shop ever services, adjusts, cleans, or unjams powered equipment. That covers CNC routers, trim saws, grinding wheels, roll formers, resin pumps, conveyor systems, and even large ventilation fans. 29 CFR 1910.147 requires a written energy control program, machine-specific procedures for each piece of equipment, and annual inspections of those procedures ^[7].

Lockout/tagout lands in OSHA's top 10 most-cited standards every year across all industries. In fabrication shops the most common violation is the absence of machine-specific written procedures. A generic "turn it off and lock it out" policy does not satisfy 1910.147(c)(4), which requires procedures written for each piece of equipment.

For a full breakdown of the written program and training requirements, the lockout tagout guide covers the standard step by step.

What training does OSHA require for fiberglass shop employees?

OSHA has no single "fiberglass training" standard. Training requirements flow from whichever standards apply to your workplace. For a typical fiberglass shop, that means documented training on:

• Hazard Communication (29 CFR 1910.1200): before initial assignment, updated when new hazards appear
• Respiratory Protection (29 CFR 1910.134): before use of any respirator
• PPE selection and use (29 CFR 1910.132): before a task requiring PPE
• Lockout/Tagout (29 CFR 1910.147): authorized and affected employees before they service equipment
• Emergency Action Plan (29 CFR 1910.38): before initial assignment, covering fire exits, assembly points, and emergency contacts
• Fire extinguisher use (29 CFR 1910.157): if employees are expected to use portable extinguishers
• Forklift operation (29 CFR 1910.178): if your shop runs a lift truck for material handling. See our forklift certification article for what that training must cover.

For supervisors who oversee several compliance areas, an OSHA 30 course gives a solid general industry foundation, though it is not a substitute for the specific training each standard demands.

Records of all training must be kept and must include employee name, date, subject covered, and the name of the trainer or provider. OSHA inspectors ask for training records early in any inspection. If you cannot produce them, the citations assume training never happened.

What does an OSHA inspection of a fiberglass shop actually look at?

OSHA compliance officers who inspect fabrication shops walk through a predictable checklist, and they follow leads they see or smell during the walk-around. In fiberglass shops, the first thing an inspector notices is the air. If it smells strongly of styrene in the first five seconds, expect air sampling and a close look at ventilation.

The most commonly cited standards in fiberglass and composites fabrication, based on OSHA enforcement data and industry reports, are:

1. Hazard Communication (1910.1200): missing SDSs, unlabeled containers, no written program, no training records 2. Respiratory Protection (1910.134): workers wearing respirators without medical evaluations, no written program, wrong cartridge type for styrene 3. Air Contaminants (1910.1000): documented exposures above PELs, usually from industrial hygiene sampling done during the inspection 4. PPE (1910.132): no written hazard assessment, employees not wearing required gloves or eye protection 5. Ventilation (1910.94): inadequate booth ventilation for spray operations, missing explosion-proof fixtures 6. Lockout/Tagout (1910.147): no machine-specific procedures

Inspectors can sample the air during a walk-around using direct-reading instruments for styrene. If results suggest exposures above PELs, they may bring in industrial hygienists for full-shift sampling. Citations for 1910.1000 violations typically arrive with abatement requirements that include feasibility studies for engineering controls before respiratory protection is accepted as the primary control.

Penalties for serious violations as of 2025 run up to $16,550 per violation, with willful or repeated violations up to $165,514 ^[9]. Small employer status and good faith efforts at correction can cut penalties a lot, but the base penalty structure has climbed sharply since 2016.

What written programs does a fiberglass fabrication shop actually need?

This is where many small shops carry the biggest gap. OSHA does not publish a single checklist of required written programs, so owners piece the list together from individual standards. For a typical fiberglass fabrication shop, the written programs you almost certainly need are:

1. Hazard Communication Program (1910.1200) with chemical inventory list and SDS index 2. Respiratory Protection Program (1910.134) with medical evaluation procedures and fit-test records 3. Emergency Action Plan (1910.38): required if you have more than 10 employees, or fewer employees but certain fire suppression systems 4. Lockout/Tagout Energy Control Program (1910.147) with machine-specific procedures 5. PPE Hazard Assessment (written certification under 1910.132(d)(2)) 6. Fire Prevention Plan (1910.39) if required (triggered by certain fire hazards present, including flammable solvents)

If you run a forklift, add a powered industrial truck program. If you have confined spaces (tanks, large molds with restricted openings), you need a permit-required confined space program under 1910.146.

A shop operating without these written programs is not a safety-priority question. It is a citations-at-the-first-inspection question. Building all of them from scratch runs most shop owners 20 to 40 hours without a template. SafetyFolio generates the core written programs for a shop like yours in about 15 minutes; you fill in your shop-specific details and you have documents an inspector can actually review.

Are there any OSHA standards specific to fiberglass dust and glass fiber exposure?

Fiberglass dust from cutting, grinding, sanding, and trimming is regulated under OSHA's air contaminants standard (29 CFR 1910.1000) as a nuisance particulate. The PEL for nuisance dust (particles not otherwise regulated) is 15 mg/m³ for total dust and 5 mg/m³ for the respirable fraction ^[1].

The harder question is whether steady fiberglass dust exposure carries a long-term health risk beyond nuisance. The International Agency for Research on Cancer (IARC) classified glass wool fibers as possibly carcinogenic (Group 2B) in 1988 and reviewed that classification in 2002, concluding the evidence did not support upgrading the classification for the types of glass fibers used in most commercial fabrication. OSHA has no specific standard for glass fibers on par with its asbestos or silica rules ^[10].

Here is the practical read. Grinding and dry-sanding cured fiberglass throws off significant airborne fiber and particulate. Workers doing this most of the day should wear N95 or better filtering facepiece respirators for particulate protection, on top of any organic vapor protection required for resin work. The combination cartridge approach (OV/P100) covers both hazards in a single respirator.

Skin irritation from glass fibers is a real problem too, and no specific OSHA standard names it, but it gets addressed through PPE requirements and the general duty clause. Long sleeves, nitrile gloves, and washing with running water (not wiping, which drives fibers deeper) are the standard recommendations from NIOSH.

What do state OSHA plans mean for a fiberglass shop?

Twenty-two states and two territories run their own OSHA-approved state plans instead of deferring to federal OSHA ^[11]. If your shop is in California, Washington, Michigan, North Carolina, or one of the other state-plan states, your primary enforcement agency is the state plan, not federal OSHA.

State plans must be at least as effective as federal OSHA, and they can be stricter. California's Cal/OSHA, for one, sets its own permissible exposure limit for styrene: a 50 ppm TWA, half the federal PEL ^[12]. Cal/OSHA also carries specific heat illness prevention requirements and, in some cases, more detailed ventilation rules than the federal standard.

The takeaway is simple. Check whether your state runs a state plan before assuming federal OSHA rules are your only obligation. The OSHA website's state plan page lists all 28 state-plan jurisdictions. If you are in a state-plan state, verify any chemical-specific PELs and industry-specific rules with your state agency directly.

Frequently asked questions

Does OSHA require air monitoring for styrene in my fiberglass shop?

OSHA does not explicitly require routine styrene air monitoring in 29 CFR 1910.1000 the way it does for regulated substances like benzene or asbestos. But if an inspector has reason to believe exposures may top the PEL of 100 ppm TWA, they can sample during an inspection. More to the point, without your own monitoring data you cannot confirm compliance or properly select respirator cartridges. Industrial hygiene sampling is strongly recommended for any open-mold spray operation.

What type of respirator do fiberglass workers need for styrene?

For styrene vapor, workers need a NIOSH-approved air-purifying respirator with organic vapor cartridges, at minimum a half-face piece. If fiberglass dust is also present from grinding or sanding, a combination OV/P100 cartridge covers both hazards. The selection must be based on measured or estimated exposure concentration relative to the cartridge's assigned protection factor. Fit testing and medical evaluation are required before use under 29 CFR 1910.134.

How do I know if my fiberglass shop is required to keep OSHA injury records?

If your shop had 10 or more employees at any point in the previous calendar year, you likely must keep the OSHA 300 Log, 301 Incident Report forms, and post the 300A Summary annually. Shops with fewer than 10 employees are partially exempt from routine recordkeeping but must still report fatalities within 8 hours and hospitalizations, amputations, or eye losses within 24 hours. Confirm your NAICS code's status at the OSHA website's exemption list.

Do I need explosion-proof electrical fixtures in my fiberglass shop?

Yes, in spray areas. 29 CFR 1910.94(c) requires that spray finishing areas use electrical equipment approved for Class I, Division 1 or Division 2 hazardous locations, depending on the extent and persistence of flammable vapor. NFPA 33 (Standard for Spray Application Using Flammable or Combustible Materials) provides the design criteria inspectors reference. Standard electrical fixtures in a spray area are a serious fire hazard and a citable OSHA violation.

What is MEKP and why does OSHA care about it in a fiberglass shop?

Methyl ethyl ketone peroxide (MEKP) is the catalyst used to start curing in polyester and vinyl ester resins. It is a Class I organic peroxide: highly reactive, a strong oxidizer, and a severe eye and skin hazard. OSHA has no specific PEL for MEKP vapors, but it cites shops under the general duty clause for improper storage (too close to flammables, wrong temperature), inadequate PPE, and failing to train workers on the SDS hazard information.

Can workers wear a simple dust mask instead of a cartridge respirator for fiberglass work?

No. A surgical-style dust mask or filtering facepiece respirator without organic vapor protection does nothing against styrene or other solvent vapors. It may filter some particulate but offers zero chemical vapor protection. Using inadequate respiratory protection while believing workers are protected is arguably worse than no respirator at all. Select respirators based on actual hazards: OV/P100 combination cartridges for most resin and finishing tasks.

How often does OSHA require fiberglass shop employees to be retrained?

It depends on the standard. Hazard Communication training is required when a new hazard shows up, not on a fixed annual schedule. Respiratory protection training is required annually and when deficiencies in use are observed. Lockout/tagout retraining is required when procedures change or when annual inspections turn up problems. Forklift operator evaluations are required at least every three years. Keep records for all training events showing names, dates, and topics covered.

What is the OSHA penalty for styrene exposure violations in a small shop?

OSHA classifies air contaminant violations as serious if they could cause death or serious physical harm. Serious violation penalties run up to $16,550 per violation as of 2025, adjusted annually for inflation. A willful or repeated violation can reach $165,514. Small employer status (typically fewer than 250 employees at the site and company) and demonstrated good faith can cut penalties by 60% to 80%. Prompt abatement also factors into final penalty amounts.

Does OSHA require a written ventilation program for a fiberglass shop?

29 CFR 1910.94 does not require a separate written ventilation program the way the respiratory protection standard requires a written program. It does require that spray booths meet design and maintenance specifications, including regular cleaning of filters and ductwork, and that ventilation equipment be inspected regularly. Maintenance records for your ventilation system are the practical documentation OSHA expects to see.

If my fiberglass shop has only 3 employees, do OSHA rules still apply?

Yes. All OSHA safety and health standards apply regardless of company size. The exception is partial recordkeeping: shops with fewer than 10 employees are exempt from routinely keeping the OSHA 300 Log. But the chemical exposure limits, required written programs, PPE requirements, training mandates, and reporting requirements for fatalities and severe injuries apply to a one-person shop just as they do to a 300-person facility.

What is the OSHA standard for storing flammable solvents like acetone in a fiberglass shop?

29 CFR 1910.106 governs flammable liquid storage. Acetone is a Class IB flammable liquid. Quantities over one gallon must be stored in approved safety cans or approved storage cabinets. No more than 25 gallons of Class IB liquids may be stored outside a storage room or cabinet in a fabrication area. The standard also prohibits storing flammable liquids near open flames or heat sources and requires grounding for metal containers during transfer.

Do I need a written confined space program if we fabricate large tanks or boat hulls?

Possibly yes. A confined space under 29 CFR 1910.146 is any space large enough for a worker to bodily enter, with limited means of entry and exit, and not designed for continuous occupancy. Large molds, tanks, and boat hulls can qualify. If the space also holds a serious atmospheric hazard (like styrene vapors from freshly applied resin), it is a permit-required confined space, and a written permit space program, attendants, and atmospheric monitoring are required before entry.

Where can I find OSHA's guidance specifically for fiberglass and composites manufacturing?

OSHA published a technical manual chapter on styrene in the OSHA Technical Manual (OTM), Section III, Chapter 2, available on OSHA.gov. The American Composites Manufacturers Association (ACMA) has also published industry-specific exposure guidance. NIOSH published a criteria document for occupational exposure to styrene. None of these replace the actual CFR standards, but they add useful context for compliance decisions and get referenced during inspections.

Sources

1. OSHA, 29 CFR 1910.1000 Air Contaminants (Table Z-1 and Z-2): Styrene OSHA PEL is 100 ppm 8-hour TWA with 200 ppm ceiling; acetone PEL is 1,000 ppm; listed in Tables Z-1 and Z-2
2. OSHA, 29 CFR 1910.134 Respiratory Protection: Written respiratory protection program required when respirators are used; medical evaluation and fit testing required before tight-fitting respirator use
3. OSHA, 29 CFR 1910.1200 Hazard Communication: Requires written HazCom program, SDS for every hazardous chemical, container labeling, and employee training
4. OSHA, 29 CFR 1910.132 Personal Protective Equipment (General Requirements): Employer must conduct written PPE hazard assessment and provide PPE at no cost to employees
5. OSHA, 29 CFR 1910.94 Ventilation: Spray finishing areas must be ventilated to maintain solvent vapor below 25% of LEL; explosion-proof electrical required in spray zones
6. OSHA, 29 CFR 1904 Recording and Reporting Occupational Injuries and Illnesses: Employers with 10 or more employees must maintain OSHA 300 Log and 301 forms; all employers must report fatalities within 8 hours and severe injuries within 24 hours
7. OSHA, 29 CFR 1910.147 Control of Hazardous Energy (Lockout/Tagout): Written energy control program and machine-specific procedures required for equipment servicing; annual inspection of procedures required
8. OSHA Technical Manual, Section III Chapter 2: Styrene: Open-mold spray-up operations can produce styrene concentrations well above 100 ppm near the operator breathing zone without effective local exhaust ventilation
9. OSHA, Penalties (Civil Monetary Penalty Inflation Adjustments 2025): Serious violations up to $16,550 per violation; willful or repeated violations up to $165,514 as of 2025
10. IARC Monographs Volume 81: Man-Made Vitreous Fibres: IARC classified glass wool fibers as Group 2B (possibly carcinogenic) in 1988; 2002 review did not upgrade the classification for commercial glass fibers
11. OSHA, State Plans: 22 states and 2 territories operate OSHA-approved state plans that may set stricter standards than federal OSHA
12. California Division of Occupational Safety and Health (Cal/OSHA), California Code of Regulations Title 8 Section 5155: Cal/OSHA sets styrene TWA at 50 ppm, half the federal OSHA PEL
13. NIOSH, Criteria for a Recommended Standard: Occupational Exposure to Styrene: NIOSH recommended exposure limit for styrene is 50 ppm TWA and 100 ppm STEL
14. OSHA, 29 CFR 1910.106 Flammable Liquids: Quantities over one gallon of Class IB flammable liquids must be stored in approved safety cans or cabinets; no more than 25 gallons allowed outside storage areas in fabrication spaces