Section 5-1.62 - Alternative compliance criteria for enhanced coagulation

5-1.62 Alternative compliance criteria for enhanced coagulation. Systems may use one of the following alternative compliance criteria instead of enhanced coagulation.  Systems using the alternative compliance criteria shall still comply with the monitoring requirements stated in section 5-1.61 of this Subpart.

 

Water Type

Parameter

Concentration

Calculation Frequency

Source water

TOC

≤2.0 mg/L

Quarterly RAA

Treated water

TOC

≤2.0 mg/L

Quarterly RAA

Source water1,2

SUVA

≤2.0 L/mg-m

Quarterly RAA

Treated water2

SUVA

≤2.0 L/mg-m

Quarterly RAA

Source water

TOC

<4.0 mg/L

Quarterly RAA

Alkalinity (as CaCO3)

>60 mg/L

Quarterly RAA

TTHM

≤0.040 mg/L

LRAA of all sites

HAA5

≤0.030 mg/L

LRAA of all sites

Treated water in the distribution system3

TTHM

≤0.040 mg/L

LRAA of all sites

HAA5

≤0.030 mg/L

LRAA of all sites

 

 

1Prior to any treatment

2Measured monthly

3System uses only chlorine for primary disinfection and maintains a residual in the distribution system.

 

 

Effective Date: 
Wednesday, January 17, 2018
Doc Status: 
Complete