- EPA Methods 1642 and 1643 for Virus Analysis
- Determining the Effectiveness of On-site Septic Systems foe the Removal of Viruses
Analysis for the two types of phage in this study – MS-2 and Somatic coliphage – will be conducted according to EPA Method 1642 and EPA Method 1643. The methods themselves are identical with the exception of a step in Method 1642 that utilizes ultrafiltration to increase the concentration of virus for analysis.
Analysis for the three types of bacteria in this study will be conducted using the Quanti-Tray system from IDEXX.