Lead Base Paint is defined by lead content exceeding 1.0 mg/cm3 or what percent by weight?

Lead Base Paint is defined by lead content exceeding 1.0 mg/cm3 or what percent by weight?

• A. 0.5% by weight
• B. 0.05% by weight
• C. 1.0% by weight
• D. 0.1% by weight

Answer: (A)

Lead-based paint is defined by how much lead is in the paint itself, measured as a percent by weight. The regulatory threshold is 0.5% lead by weight (5,000 parts per million). When paint contains lead at or above this level, it’s classified as lead-based paint and triggers specific federal requirements for disclosure and remediation. The figure of 1.0 mg/cm2 relates to lead found in dust on surfaces, not the paint’s own lead content, and is used to assess hazard after disturbance rather than define the paint. So, 0.5% by weight is the correct criterion.

Lead-based paint is defined by how much lead is in the paint itself, measured as a percent by weight. The regulatory threshold is 0.5% lead by weight (5,000 parts per million). When paint contains lead at or above this level, it’s classified as lead-based paint and triggers specific federal requirements for disclosure and remediation. The figure of 1.0 mg/cm2 relates to lead found in dust on surfaces, not the paint’s own lead content, and is used to assess hazard after disturbance rather than define the paint. So, 0.5% by weight is the correct criterion.