Lead-based paint is defined as any coating on surfaces that contains which thresholds for lead?

Lead-based paint is defined as any coating on surfaces that contains which thresholds for lead?

• A. 1.0 mg/cm2 or more of lead, or 0.5% or more lead by weight
• B. 0.5 mg/cm2 or more of lead, or 1% or more lead by weight
• C. 2.0 mg/cm2 or more of lead, or 0.1% or more lead by weight
• D. 0.1 mg/cm2 or more of lead, or 0.05% or more lead by weight

Answer: (A)

Lead-containing coatings are defined by two regulatory thresholds: if the painted coating has 1.0 milligram of lead per square centimeter of surface, or if the coating contains 0.5% lead by weight, it is considered lead-based paint. The weight-based threshold (0.5%) equals about 5,000 parts per million. In practical terms, a 100-gram sample of paint would need at least 0.5 grams of lead to meet the weight criterion, and a one-square-centimeter patch would need at least 1 milligram of lead to meet the area criterion. These standards are used for regulatory purposes such as disclosure and abatement decisions. The other options do not match these established thresholds.

Lead-containing coatings are defined by two regulatory thresholds: if the painted coating has 1.0 milligram of lead per square centimeter of surface, or if the coating contains 0.5% lead by weight, it is considered lead-based paint. The weight-based threshold (0.5%) equals about 5,000 parts per million. In practical terms, a 100-gram sample of paint would need at least 0.5 grams of lead to meet the weight criterion, and a one-square-centimeter patch would need at least 1 milligram of lead to meet the area criterion. These standards are used for regulatory purposes such as disclosure and abatement decisions. The other options do not match these established thresholds.