Title: Section 5-1.62 - Alternative compliance criteria for enhanced coagulation

Effective Date

01/17/2018

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 water^1,2	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
Treated water in the distribution system³	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.

Volume

VOLUME A (Title 10)