HATS Stage 2A - Provision of Disinfection Facilities at SCISTW

Effluent Quality (at Existing Chamber No. 15) - Oct 2008

TRC and Potential CBPs

Item	Parameters (mg/L)
Total residual Chlorine (TRC)	11
Bromoform	0.4
Bromodichloromethane	0.1
Chloroform	2
Dibromochloromethane	0.4
Bromoacetic acid	<2
Chloroacetic acid	<2
Dibromoacetic acid	<2
Dichloroacetic acid	<2
Trichloroacetic acid	<2

Contaminants of Concern (COCs)

Item	Parameters (mg/L)
Methylene chloride	<20
Carbon tetrachloride	<0.5
Chlorobenzene	<0.5
1,1-dichloroethane	<0.5
1,2-dichloroethane	<0.5
1,1-dichloroethylene	<0.5
1,2-dichloropropane	<0.5
Tetrachloroethylene	0.6
1,1,1-trichloroethane	<0.5
1,1,2-trichloroethane	<0.5
Trichloroethylene	0.6
2-chlorophenol	<0.5
2,4-dichlorophenol	<0.5
p-chloro-m-cresol	<0.5
Pentachlorophenol	<0.5
2,4,6-trichlorophenol	<0.5
Bis(2-chloroethoxy) methane	<0.5
1,4-dichlorobenzene	<0.5
Hexachlorobenzene	<0.01
Hexachlorocyclopentadiene	<2.5
Hexachloroethane	<0.5
1,2,4-trichlorobenzene	<0.5
Alpha-BHC	<0.01
Beta-BHC	<0.01
Gamma-BHC	<0.01