Question # 204

204. An oxidation/reduction reaction that occurs as part of a waste treatment operation results in the formation of 2,500 pounds of lead chromate. How must a threshold determination be made for this compound?
Lead chromate meets the criteria for both a lead compound and a chromium compound. In such cases, the total amount of the compound manufactured, processed, or otherwise used must be applied to the threshold determination for both metal compound categories. The weight of the entire compound, not the weight of the parent metal, is applied for the threshold determination of each metal compound category.