- Collect sample in clean container from effluent composite sampler.
- Bring sample back to lab.
- Pour sample into (2) whil-pal sterilized water sampling bags containing sodium thiosulfate to 100 ml. mark.
- Let sample sit until tablet in bag is dissolved. Check sample for 0.00 chlorine residual on DR 2000.
- Pour (1) sample in sterile Gelman microfunnel to 25 ml. mark and turn on vacuum pressure pump for filtering.
- Pour 25 ml. sterile phosphate solution into tunnel and filter.
- Turn off vacuum pump.
Thomas J. Sciarrino of Windsor Locks cooks up some handy Standard Operating Procedures for the Lab. Look for new procedures each month.
