CA Plumbing PrepC-36 License Exam Prep
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Trade Exam · Module 6

Hazardous Materials on Plumbing Jobs

Lesson 5 of 8~20 minFree previewCurrent as of September 2026Leer en español

What a plumber needs to know about the hazardous materials found on the job: the Hazard Communication standard and the 16-section Safety Data Sheet, presumed asbestos in pre-1981 pipe insulation and the 100 square foot registration and certification line, lead in old solder and Cal/OSHA's lead-in-construction rules, the 2025 CPC lead limits for new work, sewage and biological hazards, solvent cements, and your right to refuse unsafe work.

Key Takeaways

  • Employers keep a Safety Data Sheet for every hazardous chemical, readily accessible to workers during each shift, and train workers when first assigned and when a new chemical hazard arrives (Title 8 Section 5194).
  • SDS Section 4 is first aid and Section 8 is exposure controls and personal protection; every SDS uses the same 16 sections in the same order.
  • Thermal system insulation and surfacing material in buildings built no later than 1980 is presumed to contain asbestos until shown otherwise (Section 1529).
  • Asbestos work on 100 square feet or more of asbestos-containing material requires Cal/OSHA registration and a C-22 license or an asbestos-certified qualifier (Section 341.6; B&P 7058.5).
  • Cal/OSHA's lead-in-construction rule treats torch soldering, cutting and similar work as disturbing lead; the PEL is 10 micrograms per cubic meter as an 8-hour average (Section 1532.1).
  • Workers exposed to lead wash hands, arms and face before eating, drinking or smoking, and no food or drink is kept where lead exposure occurs (Section 1532.1(i)).
  • New potable water work: solder and flux may contain no more than 0.2 percent lead, and pipes, fittings and fixtures no more than a weighted average of 0.25 percent (2025 CPC 604.2).
  • For sewage work, CDC recommends goggles, a face shield or mask, waterproof gloves, liquid-repellent coveralls and rubber boots, and washing with soap and water right after handling waste and after removing PPE.

Why This Matters

Plumbers open up old buildings for a living. That means pipe insulation that may be asbestos, joints made with lead solder, sewage, mold behind leaking walls, caustic drain cleaners and solvent cements in small rooms. The Safety section of the C-36 exam asks what to do when you find these things. The pattern is the same every time: recognize the hazard, do not disturb what you are not qualified to handle, protect yourself, and report it.

Hazard Communication and the SDS

California's Hazard Communication standard is Title 8 Section 5194.

  • Written program. The employer develops and maintains a written hazard communication program covering labels, safety data sheets and training. On multi-employer sites, the program explains how employers share SDS access and precautions with each other (Section 5194(e)).
  • Labels. Containers shipped by the manufacturer carry a product identifier, signal word, hazard statements, pictograms, precautionary statements and the responsible party's contact information (Section 5194(f)(1)).
  • Safety Data Sheets. The employer keeps an SDS for each hazardous chemical in the workplace and makes it readily accessible to workers in their work area during each shift. Electronic access is allowed if nothing stands in the way of immediate access (Section 5194(g)(8)).
  • Training. Workers get effective information and training at their initial assignment and whenever a new chemical hazard is introduced (Section 5194(h)(1)).

Every SDS uses the same 16 sections in the same order (Section 5194(g)). The ones you will use most:

  • Section 1, Identification and Section 2, Hazard(s) identification: what the product is and what it can do to you.
  • Section 4, First-aid measures: what to do right away after a splash, spill or inhalation.
  • Section 7, Handling and storage.
  • Section 8, Exposure controls/personal protection: the ventilation, gloves, eye protection and respirator the product calls for.

Read Sections 2, 4 and 8 before you open a new product, not after something goes wrong.

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