Application - Wastewater Chemistries - Disinfection

Parameter	Purpose of Test	Method
Chlorine, Free	Data used to control Chlorine based disinfection processes, required for reporting at POE and in the distribution system, also used in monitoring in the distribution system during flushing and line break maintenance. EPA Primary DW Standard at 4.0 mg/L as CL₂.	8021 10231
Chlorine, Total	Data used to control Chlorine based disinfection processes, required for reporting at POE and in the distribution system, also used in monitoring in the distribution system during flushing and line break maintenance. EPA Primary DW Standard at 4.0 mg/L as CL₂.	8167 10070 10232
Chlorine, Total Amperometric Titration	Chlorine is used to disinfect WW plant effluents, prior to discharge to a receiving body. It is normally present as "combined" chlorine (chloramines). Chlorination is generally followed by de-chlorination with sulfer compounds, prior to release fo effluent. Amperometric titration is considered the "reference" method for comparisons	See AutoCAT 9000 Manual
Chlorine, Total ULR	Chlorine is used to disinfect WW plant effluents, prior to discharge to a receiving body. It is normally present as "combined" chlorine (chloramines). Chlorination is generally followed by de-chlorination with sulfer compounds, prior to release fo effluent. ULR — This photometric method is EPA approced for ppb level chlorine determination in WW effluent chlorination/dechlorination processes.	10014

Parameter	Purpose of Test	Method
Coliforms, Fecal E.Coli	Monitor and quantify microbial concentrations in the effluent. NPDES reporting requirement for some facilities	8074
Flow	Measure standard in-pipe flow rate for NPDES permit requirements and to establish concentrations/total presence of key analytes.
THM/THMFP	Form as unwanted disinfection by-products when organic matter reacts with chlorine (or bromine). Current EPA regulations allow no more than 80 ppb of total THMs in drinking water supplies.	10224
Ozone	Control disinfection processes/in-package disinfection Ozone is often used in place of chlorine, to avoid taste issues, etc.	8311