<html> <head> <title>Rule 74:27:12:21 Final cover.</title> <META NAME="Keywords" Content="Administrative Rules 74:27:12:21"> <META NAME="Description" Content="Administrative Rules 74:27:12:21 Final cover."> <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>74:27:12:21.&nbsp;&nbsp;Final cover.</b> A minimum of 18 inches of compacted soil material and 6 inches of topsoil must be placed over MSWLF units that have reached design capacity. The compacted soil layer for existing MSWLFs or for MSWLFs meeting the small-town exemption criteria specified in §&nbsp;74:27:12:25 must have a permeability of 1 x 10</font><sup><font size=4 face="Times New Roman">-5</font></sup><font size=3 face="Times New Roman"> cm/sec or less.</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; The compacted soil layer for new MSWLFs or lateral expansion of existing MSWLFs must have a permeability of 1 x 10</font><sup><font size=4 face="Times New Roman">-5</font></sup><font size=3 face="Times New Roman"> cm/sec or less. The final surface gradient of the unit must be at least 2 percent to prevent ponding. The vegetative cover must be seeded and established in accordance with the South Dakota Field Office Technical Guide, Section IV-A, Plant Sciences, (September 26, 1984), Critical Area Planting, and in consultation with the local soil conservation district office personnel. Other facilities must install a minimum of two feet of earthen material capable of maintaining perennial vegetation.</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> 17 SDR 8, effective July 26, 1990; 19 SDR 186, effective June 10, 1993.</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-6-1.6">34A-6-1.6.</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-6-1.6">34A-6-1.6.</A></font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </div> </body> </html>