<html> <head> <title>Rule 74:56:01:42 Release investigation and confirmation.</title> <META NAME="Keywords" Content="Administrative Rules 74:56:01:42"> <META NAME="Description" Content="Administrative Rules 74:56:01:42 Release investigation and confirmation."> <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>74:56:01:42.&nbsp;&nbsp;Release investigation and confirmation.</b> Unless corrective action is initiated by the owner or operator or is otherwise directed by the department, all suspected releases requiring reporting under §&nbsp;74:56:01:40 must be immediately investigated by the owner or operator using one of the procedures listed in this section. If one of these methods confirms a release, the owner and operator must comply with the requirements for corrective action in §§&nbsp;74:56:01:44 to 74:56:01:51, inclusive. The methods are as follows:</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;A site-specific investigation, under the direction of the department, of the suspected release incident to determine if a release has occurred;</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;In the case of an UST system that has secondary containment, an investigation of a possible release into the interstitial area between the UST and the secondary barrier using procedures that will determine if the interstitial monitoring is working properly;</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;In the case of a failed tank or piping tightness test;</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;A check of inventory records in accordance with the requirements in subdivision 74:56:01:26(2) to detect a discrepancy that indicates a release may have occurred;</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;Retesting the piping within seven days after the initial report to the department in accordance with the requirements in subdivision 74:56:01:26(1) to determine if a release may have occurred;</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;Retesting the tank within seven days after the initial reporting to the department in accordance with the requirements in subdivision 74:56:01:26(1) to determine if a release may have occurred after the top of the tank has been excavated and all loose fittings, vent pipes, or other equipment have been checked, replaced, or tightened; 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; (d)&nbsp;&nbsp;Laboratory analysis of soil samples for regulated substances in the unsaturated zone and, if applicable, visual inspection of the groundwater under the UST system;</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;In the case of a discrepancy during inventory reconciliation in accordance with subdivision 74:56:01:26(2) or any other suspected release, an investigation conducted in the following manner:</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;A tightness test of the tanks and piping in accordance with the requirements in subdivision 74:56:01:26(1) that is conducted within seven days after the initial report to the department to determine if a release may have occurred; 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; (b)&nbsp;&nbsp;Laboratory analysis of soil samples for regulated substances in the unsaturated zone and, if applicable, visual inspection of the groundwater under the UST system; or</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; (5)</font> <font size=3 face="Times New Roman">Any other investigative procedure that is no less stringent than any of the procedures in subdivisions (1) to (4), inclusive, of this section and is approved for the UST system by the department.</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; 18 SDR 62, effective October 10, 1991; transferred from §&nbsp;74:03:28:16, July 1, 1996; 23 SDR 131, effective February 24, 1997.</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>