Weight concentration is the measure of lead contained in dust expressed as?

Weight concentration is the measure of lead contained in dust expressed as?

• A. micrograms per liter
• B. milligrams per square meter
• C. micrograms of lead contained in dust per gram of dust (ug/g)
• D. grams per square foot

Answer: (C)

Weight concentration looks at how much lead is packed into a given amount of dust. The standard way to express this is micrograms of lead per gram of dust (ug/g), a true mass-to-mass concentration that lets you compare how contaminated different dust samples are regardless of how much dust you collected or where it came from. Other units describe the lead by volume (micrograms per liter) or by area (mass per surface area, like grams per square foot or milligrams per square meter), which measure surface loading or areal contamination rather than the amount of lead contained in the dust itself. That’s why ug/g is the correct way to express the weight concentration.

Weight concentration looks at how much lead is packed into a given amount of dust. The standard way to express this is micrograms of lead per gram of dust (ug/g), a true mass-to-mass concentration that lets you compare how contaminated different dust samples are regardless of how much dust you collected or where it came from. Other units describe the lead by volume (micrograms per liter) or by area (mass per surface area, like grams per square foot or milligrams per square meter), which measure surface loading or areal contamination rather than the amount of lead contained in the dust itself. That’s why ug/g is the correct way to express the weight concentration.