<html> <head> <title>Rule 74:04:12:23 Distribution system residual disinfectant concentration sampling plans for systems that also use groundwater.</title> <META NAME="Keywords" Content="Administrative Rules 74:04:12:23"> <META NAME="Description" Content="Administrative Rules 74:04:12:23 Distribution system residual disinfectant concentration sampling plans for systems that also use groundwater."> <meta name=Generator content="Microsoft Office HTML Filter 2.0"> <meta http-equiv=Content-Type content="text/html; charset=windows-1252"> <meta name=Originator content="Microsoft Word 10"> <style> <!-- --> </style> </head> <body lang=EN-US> <div> <p><b><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 74:04:12:23.&nbsp;&nbsp;Distribution system residual disinfection concentration sampling plans for systems that also use groundwater.</font></b>&nbsp; The residual disinfectant concentration must be measured at least at the same points in the distribution system and at the same time that total coliform monitoring, as required in §&nbsp;74:04:12:09, occurs. However, the department may allow a system which uses a combination of surface water or groundwater under the direct influence of surface water and groundwater to take disinfectant residual samples at points other than the total coliform sampling points if the department determines that such points are more representative of treated (disinfected) surface water quality within the distribution system.</p> <p><b><font size=3 face=Times>&nbsp;</font></b></p> <p><b><font size=3 face=Times>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Source:</font></b><font size=3> 31 SDR 21, effective August 24, 2004.</font></p> <p><b><font size=3 face=Times>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; General Authority:</font></b><font size=3> 34A-3A-3.</font></p> <p><b><font size=3 face=Times>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Law Implemented:</font></b><font size=3> 34A-3A-3(2).</font></p> <p><font size=3 face=Times>&nbsp;</font></p> </div> </body> </html>