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HOLDING TIME STUDY FOR FECALS/SALMONELLA & CONNECTING LANGUAGE FOR 503 REGULATIONS
Citation:
MECKES, M. C. HOLDING TIME STUDY FOR FECALS/SALMONELLA & CONNECTING LANGUAGE FOR 503 REGULATIONS. Presented at 8th Annual Biosolids Conference/Workshop, Bolger Center, Potomac, MD, June 26 - 29, 2006.
Impact/Purpose:
To inform the public
Description:
Current federal regulations required monitoring for fecal coliforms or Salmonella in biosolids destined for land application. Methods used for analysis of fecal coliforms and Salmonella have been developed and are currently in use for quantification of these organisms. Recently completed validation studies have resulted in the development of three EPA methods, two for fecal coliform analysis and one for the analysis of salmonellae in biosolids. However, many publicly owned wastewater treatment facilities do not have the capabilities to rapidly assay biosolids samples for microbes. Furthermore, holding such samples for extended periods of time can affect analytical results. Consequently, the length of time for holding such samples so that analytical results were not compromised needed to be identified. This study was developed by EPA’s Office of Water to determine if significant differences in fecal coliform and salmonellae densities are observed when samples are held longer than six hours. This presentation discusses the approach taken for the study and preliminary results. This presentation also presents information regarding the new EPA methods currently available for analysis of biosolids and new language which has been published in the Federal Register which permits the use of these new methods for compliance monitoring under the land application of biosolids regulations (40CFR503).