Is guidance available concerning sampling (number and location) to ensure adequate site coverage?
The requirements for sampling will depend on the intended objectives of the RBA assessment and site characteristics (i.e., geography, geology, and history of lead contamination of soil). Guidance documents specifically directed at sampling for RBA assessments have not been developed by US EPA; however, the existing Agency guidance on soil sampling can be found at the Soil Sampling Quality Assurance User’s Guide (PDF)(267 pp., 3.61 MB). In addition, the Bioavailability Committee can be consulted for advice on sampling objectives and strategies to address factors that can impact bioavailability (e.g., minderal composition, particle size, etc.). Inquires can be directed to the Bioavailability Committee Co-Chairs BAhelp@epa.gov.
