Wastewater & Onsite Systems | Publications
The Wastewater Treatment Plant Operators Guide to Biosolids Sampling Plans
Residuals are the organic, nutrient-rich residues removed from wastewater during the treatment process. If they’ve been processed so they can be applied to land as fertilizer, they also go by another name—biosolids. But before biosolids can actually be land applied, samples must be analyzed in a laboratory to determine if they comply with state and federal land application regulations. If decisions on compliance are to be accurate and credible, it is vital that those doing the sampling are doing it the right way.
In 2006, NEIWPCC published The Wastewater Treatment Plant Operators Guide to Biosolids Sampling Plans. The manual covers proper sample collection, handling, and documentation procedures; laboratory and detection limit considerations; and data reporting. It emphasizes the benefits of pre-planning for sampling events including the development of a comprehensive sampling plan, and it offers guidelines for the solicitation of laboratory services. All of this should be particularly helpful for staff at small- to medium-sized treatment plants, who often aren’t experienced at sampling residuals and may be unfamiliar with working with laboratories. The guide was the product of an intensive development process that included extensive review by peers and technical experts.
PLEASE NOTE: We are aware that the holding time for mercury is incorrectly listed as 6 months in the Federal Sludge Analytical Requirements table in Appendix B and D of the printed edition. The correct holding time for mercury is 28 days. We have revised the downloadable edition to reflect the proper mercury hold time.
Downloading this Guide
Download a complete PDF of:
or, download a section of the guide as listed below.
To order a hard-copy, download an order form. For more information, contact Michael Jennings, NEIWPCC.
- How to use this guide
- Chapter 1: Introduction
- Chapter 2: Elements of a Sampling Plan
- Chapter 3: Goals of a Sampling Plan
- Chapter 4: Description of the Facility Generating Sludge
- Chapter 5: Data Quality Objectives
- Chapter 6: Selection and Description of Sampling Points
- Chapter 7: Sample Collection Procedures
- Chapter 8: Sample Handling Procedures
- Chapter 9: Evaluation of Completeness
- Chapter 10: Record-Keeping and Reporting Procedures
- Appendix A: Sampling Plan Worksheet
- Appendix B: Example of Completed Sampling Plan Worksheet
- Appendix C: Pathogen Reduction and Vector Attraction Reduction
(PR/VAR) Methods and Options
- Appendix D: State and Federal Analytical Requirements
- Appendix E: Questions to Assist with Laboratory Selection
- Appendix F: Microbial Sampling Considerations
- Appendix G: Students T-Test Calculation
- Appendix H: Example of Sludge Sampling Procedures
- Appendix I: Field Data Sheet
- Appendix J: Example of Chain-of-Custody Form
- Appendix K: Glossary
- Appendix L: Regional Regulatory Contact Information