<html> <head> <title>Rule 74:56:01:31 Release detection requirements -- Manual tank monitoring.</title> <META NAME="Keywords" Content="Administrative Rules 74:56:01:31"> <META NAME="Description" Content="Administrative Rules 74:56:01:31 Release detection requirements -- Manual tank 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>74:56:01:31.&nbsp;&nbsp;Release detection requirements -- Manual tank monitoring.</b> Only tanks of 1,000 gallons or less capacity may use manual tank monitoring as the sole method of release detection. Tanks of 1,001 to 2,000 gallons, inclusive, may use manual tank monitoring in place of manual inventory control, but require tank tightness testing in accordance with §&nbsp;74:56:01:26. Tanks of greater than 2,000 gallons may not use manual tank monitoring to meet the release detection requirements.</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; Tank liquid level measurements shall be taken at the beginning and end of the time period specified in the table in this section, during which no liquid may be added to or removed from the tank. The level measurements shall be based on an average of two consecutive stick readings at both the beginning and end of the period. The equipment used must be capable of measuring the level of product over the full range of the tank's height to the nearest one-eighth of an inch.</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; A leak shall be suspected if the variation between beginning and ending measurements exceeds the weekly or monthly standards set forth in the following table:</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <div align=center> <table border=1 cellspacing=0 cellpadding=0> <tr> <td width=163 valign=top> <h1><b><font size=3 face="Times New Roman">Nominal tank</font></b></h1> </td> <td width=132 valign=top> <p><b><font size=3 face="Times New Roman">Weekly standard</font></b></p> </td> <td width=150 valign=top> <p><b><font size=3 face="Times New Roman">Minimum duration</font></b></p> </td> <td width=168 valign=top> <h1><b><font size=3 face="Times New Roman">Monthly standard</font></b></h1> </td> </tr> <tr> <td width=163 valign=top> <p align=center><b><font size=3 face="Times New Roman">capacity</font></b></p> </td> <td width=132 valign=top> <p align=center><b><font size=3 face="Times New Roman">(one test)</font></b></p> </td> <td width=150 valign=top> <p align=center><b><font size=3 face="Times New Roman">of test</font></b></p> </td> <td width=168 valign=top> <p><b><font size=3 face="Times New Roman">(average of four tests)</font></b></p> </td> </tr> <tr> <td width=163 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=132 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=150 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=168 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> <tr> <td width=163 valign=top> <p><font size=3 face="Times New Roman">550 gallons or less</font></p> </td> <td width=132 valign=top> <p><font size=3 face="Times New Roman">10 gallons</font></p> </td> <td width=150 valign=top> <p align=center><font size=3 face="Times New Roman">36 hours</font></p> </td> <td width=168 valign=top> <p><font size=3 face="Times New Roman">5 gallons</font></p> </td> </tr> <tr> <td width=163 valign=top> <p><font size=3 face="Times New Roman">551-1,000 gallons</font></p> </td> <td width=132 valign=top> <p><font size=3 face="Times New Roman">9 gallons</font></p> </td> <td width=150 valign=top> <p align=center><font size=3 face="Times New Roman">44 hours</font></p> </td> <td width=168 valign=top> <p><font size=3 face="Times New Roman">4 gallons</font></p> </td> </tr> <tr> <td width=163 valign=top> <p><font size=3 face="Times New Roman">1,001-2,000 gallons</font></p> </td> <td width=132 valign=top> <p><font size=3 face="Times New Roman">26 gallons</font></p> </td> <td width=150 valign=top> <p align=center><font size=3 face="Times New Roman">36 hours</font></p> </td> <td width=168 valign=top> <p><font size=3 face="Times New Roman">13 gallons</font></p> </td> </tr> <tr> <td width=163 valign=top> <p><font size=3 face="Times New Roman">1,000 gallons (if tank</font></p> </td> <td width=132 valign=top> <p><font size=3 face="Times New Roman">12 gallons</font></p> </td> <td width=150 valign=top> <p align=center><font size=3 face="Times New Roman">58 hours</font></p> </td> <td width=168 valign=top> <p><font size=3 face="Times New Roman">6 gallons</font></p> </td> </tr> <tr> <td width=163 valign=top> <p><font size=3 face="Times New Roman">is 48&quot; x 128&quot;)</font></p> </td> <td width=132 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=150 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=168 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> </table> </div> <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> 18 SDR 62, effective October 10, 1991; transferred from §&nbsp;74:03:28:11.06, 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>