10.3 Hazard Communication and Lead Paint

Hazard Communication: The Right to Know

The Hazard Communication Standard (HCS), 29 CFR 1910.1200, is built on a simple idea: employees have a right to know what chemicals they work with and how to protect themselves. Since 2012 the HCS has been aligned with the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), which standardized labels and data sheets worldwide. For a remodeling contractor this covers solvents, adhesives, paints, sealants, concrete mixes, cleaners, and fuels — nearly every product on a job site.

A compliant program has five elements:

1. A written hazard communication program describing how labels, data sheets, and training are handled, and listing the hazardous chemicals on site.
2. A chemical inventory that is kept current.
3. Labels on every container.
4. Safety Data Sheets (SDS) for each hazardous chemical, readily accessible to employees during each work shift.
5. Employee training at initial assignment and whenever a new chemical hazard is introduced.

Labels and Pictograms

GHS labels on shipped containers carry six elements: the product identifier, a signal word ("Danger" for severe hazards, "Warning" for lesser ones), hazard statements, precautionary statements, pictograms (black symbols inside a red diamond border — flame, skull and crossbones, health hazard, exclamation mark, and others), and supplier contact information. Chemicals transferred into secondary containers (a solvent poured into a smaller jug) must also be labeled unless the same employee uses it entirely within one shift. An unmarked squeeze bottle on a remodel is a classic citation.

The 16-Section Safety Data Sheet

The SDS replaced the old Material Safety Data Sheet (MSDS) and always follows the same 16-section order. Sections 1 through 8 cover identification, hazard identification, composition/ingredients, first-aid measures, fire-fighting measures, accidental-release measures, handling and storage, and exposure controls/personal protective equipment. Sections 9 through 16 cover physical and chemical properties, stability and reactivity, toxicological information, ecological information, disposal, transport, regulatory information, and other information. Two points the exam probes: SDSs must be readily accessible during each shift — a binder locked in the office trailer after hours fails — and employees must be trained to read and find information on the sheet, not merely told it exists.

The EPA RRP Rule for Pre-1978 Housing

Lead-based paint was banned for residential use in 1978, so any home built before then is presumed to contain lead paint unless testing proves otherwise. The EPA's Renovation, Repair and Painting (RRP) Rule, 40 CFR Part 745 (effective April 2010), applies to work performed for compensation that disturbs painted surfaces in pre-1978 housing or child-occupied facilities. The disturbance thresholds:

• More than 6 square feet of painted surface per room for interior work,
• More than 20 square feet of painted surface for exterior work, or
• Any window replacement or demolition, regardless of area.

The rule has two separate certifications that exam questions deliberately blur:

• Certified firm — the company (including a sole proprietor) must be certified. The EPA application fee is $300 and certification is valid for 5 years.
• Certified renovator — an individual who completes an 8-hour accredited training course with hands-on exercises and an exam. Certification is valid for 5 years, maintained with a 4-hour refresher before it expires. A certified renovator must be assigned to each regulated job, be on site or immediately available, direct lead-safe work, and perform or verify the post-work cleaning check.

Before work begins, the firm must give the owner and occupants the EPA pamphlet (the Renovate Right pamphlet, formally "The Lead-Safe Certified Guide to Renovate Right") and get written confirmation of receipt. During the job, lead-safe work practices are mandatory: contain the work area with plastic sheeting and warning signs; prohibit open-flame burning or torching, heat guns above 1,100 degrees Fahrenheit, and power sanding, grinding, or planing without a HEPA-filtered attachment; clean with HEPA vacuuming and wet methods; and pass a cleaning verification before re-occupancy. Records must be kept for 3 years, and EPA civil penalties for violations reach into the tens of thousands of dollars per violation per day (the figure is adjusted for inflation, so check the current amount rather than memorizing it).

One nuance: homeowners working on their own homes are generally exempt, but a paid MHIC contractor never is — and landlords' rental work is covered as well.

Lead Programs in Maryland and the Baltimore Rowhome Reality

Maryland administers its lead programs through the Maryland Department of the Environment (MDE), not through MHIC and not through OSHA. Maryland is an EPA-authorized state, meaning it runs its own RRP program that EPA has approved as at least as protective as the federal rule — Maryland contractors obtain firm certification and renovator accreditation through MDE rather than EPA directly. MDE also accredits lead abatement workers and supervisors and administers Maryland's lead risk reduction requirements for pre-1978 rental housing, a separate framework that matters to any contractor whose clients are landlords.

Keep the roles straight for the exam: the MHIC license authorizes you to contract for home improvement work; MDE/RRP certification authorizes you to disturb paint in older homes; OSHA/MOSH governs how you protect your own workers. A contractor can hold a valid MHIC license and still be breaking federal law on every pre-1978 job if the firm lacks RRP certification.

Why this is unavoidable in Maryland: Baltimore City's housing stock is dominated by rowhomes, the vast majority built well before 1950. Ordinary home-improvement tasks on these houses — replacing windows, demolishing painted plaster, scraping and repainting exterior trim, gutting kitchens — blow through the RRP thresholds immediately. A window-replacement job on a 1920 rowhome triggers the rule regardless of square footage. Failing to contain dust on a block of attached homes also exposes the neighbors' children, which is exactly the harm the rule targets and why enforcement is aggressive in older cities.

Exam Traps

• The 6-square-foot threshold is per room for interiors; the 20-square-foot threshold is exterior. Distractors swap them.
• Firm certification and renovator certification are separate — an MHIC license satisfies neither.
• The pamphlet goes to the owner and occupants before work starts, with documented receipt — not tucked into the final invoice.