How to Monitor for Bacteria and Sewage. James Beckley Virginia DEQ VCWQ Summit October 27, 2012. Why Monitor for Fecal Bacteria and Sewage. Fecal bacteria is the largest impairment source of streams in Virginia; currently at 9,154 miles
October 27, 2012
1 ml sample with 5 E. coli colonies
- Several E. coli
violations (storm events)
- Constantly high (<50%)
E. coli Counts
Katie Register, Executive Director
Clean Virginia Waterways
Gain insight into the history of an outfall without being physically present
Fabric swatch is key
Various traps & anchoring techniques.
Can be made with PVC, hose clamps, brick & wire.
If you use cotton pads (as opposed to fabric), you can make a trap using wire mesh.
Place in streams or in outfall for several days.
7 days is good.
Best in low flow situations.
Rinse off sediment. Label the fabric swatches (dates, location)
Dry the fabric swatches (not in direct sunlight)
Compare to non-exposed fabric
From: Illicit Discharge Detection and Elimination: A Guidance Manual for Program Development and Technical Assessments
To isolate intermittent discharges