Which of the following is among the required records kept when land spreading biosolids and sludge?

• A. Approved site used
• B. Number of acres applied with sludge on that day
• C. Amount of sludge applied that day and amount per acre
• D. All of the above

Answer: (D)

Recording land application of biosolids must document where you spread, how much land you spread on, and how much sludge was applied, all to show you’re operating within authorized parameters and protecting the environment. The site used must be an approved or authorized land application site, ensuring the location is permitted for this activity. The number of acres treated on a given day shows the area receiving sludge, which is essential for calculating and validating the application rate. The amount of sludge applied that day, along with the per-acre rate, demonstrates that application limits are being met and supports nutrient management and regulatory reporting. Because each of these elements is required, the best answer includes all of the above.