<html> <head> <title>Rule 74:56:01:30 Release detection requirements -- Secondary containment with interstitial monitoring.</title> <META NAME="Keywords" Content="Administrative Rules 74:56:01:30"> <META NAME="Description" Content="Administrative Rules 74:56:01:30 Release detection requirements -- Secondary containment with interstitial monitoring."> <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><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>74:56:01:30.&nbsp;&nbsp;Release detection requirements -- Secondary containment with interstitial monitoring.</b> Interstitial monitoring between the UST system and a secondary barrier immediately around it may be used as a release detection method if the following conditions are met:</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1)&nbsp;&nbsp;The secondary barrier is designed, constructed, and installed to ensure detection of any release from the UST system so that corrective action can be taken;</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (2)&nbsp;&nbsp;For double-walled UST systems, the sampling or testing method is capable of detecting a release through the inner wall;</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (3)&nbsp;&nbsp;For UST systems with a secondary barrier within the excavation area, the sampling or testing method used is capable of detecting any release within the area between the UST system and the secondary barrier and the secondary barrier meets the following conditions:</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (a)&nbsp;&nbsp;The secondary barrier around the UST system consists of native soils or artificially constructed material that is sufficiently thick and impermeable (at least 10<sup>-6</sup></font> <font size=3 face="Times New Roman">centimeters per second) to permit containment and detection of a release;</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (b)&nbsp;&nbsp;The liner or barrier is compatible with the regulated substance stored so that a release from the UST system will not cause a deterioration of the barrier;</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (c)&nbsp;&nbsp;The groundwater, soil moisture, or rainfall will not render the testing or sampling method that is used inoperative so that a release could go undetected for more than 30 days;</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (d)&nbsp;&nbsp;The site is assessed to ensure that the secondary barrier is always above the groundwater and not in a 25-year flood plain, unless the barrier and monitoring designs are for use under such conditions; and</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (e)&nbsp;&nbsp;Monitoring wells are clearly marked and secured to avoid unauthorized access and tampering;</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (4)&nbsp;&nbsp;For tanks with an internally fitted liner, an automated device can detect a release between the liner wall of the tank and the liner, and the liner is compatible with the substance stored.</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>Source:</b> 14 SDR 76, effective November 29, 1987; transferred from §&nbsp;74:03:28:11, 18 SDR 62, effective October 10, 1991; transferred from §&nbsp;74:03:28:11.05, July 1, 1996.</font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>General Authority:</b> SDCL <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=34A-2-93">34A-2-93</A>, <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=34A-2-99">34A-2-99.</A></font></p> <p><font size=3 face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>Law Implemented:</b> SDCL <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=34A-2-98">34A-2-98</A>, <A HREF="/statutes/DisplayStatute.aspx?Type=Statute&Statute=34A-2-99">34A-2-99.</A></font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </div> </body> </html>