What unit of measure is used for calculating substrate correction in lead inspections?

The unit of measure for calculating substrate correction in lead inspections is mg/cm². This measurement represents the amount of lead present per square centimeter of surface area. The use of square centimeters is appropriate because lead can be distributed unevenly across surfaces, and expressing the amount in relation to the area allows for a more accurate assessment of lead levels. This is particularly crucial in risk assessments, where the potential for lead exposure and its impact on health is evaluated. Therefore, mg/cm² provides the necessary granularity to understand and manage risks effectively, as it translates contamination levels into a format that can be easily interpreted and compared to safety guidelines or regulatory limits.