What factor is used to analyze the influence of a sample in lead loading?

The influence of a sample in lead loading is analyzed using surface area because the amount of lead exposure can be related to the area over which lead dust or particles can settle or accumulate. Larger surface areas provide more opportunity for lead particles to adhere, thus increasing the potential exposure level. The concept of surface area is crucial in understanding how lead can contaminate a space, especially in environments like homes or buildings where lead-based paint might be present.

When assessing lead loading, considering the surface area allows inspectors to evaluate the risk of lead contamination based on the physical characteristics of the surfaces present, such as walls, floors, and furniture, and helps in determining appropriate remediation strategies. Other factors, while relevant in certain contexts of exposure assessment, do not specifically address the quantification of lead loading in the way that surface area does.