<html> <head> <title>Rule 74:53:01:32 Alternative method of determining required absorption trench system area.</title> <META NAME="Keywords" Content="Administrative Rules 74:53:01:32"> <META NAME="Description" Content="Administrative Rules 74:53:01:32 Alternative method of determining required absorption trench system area."> <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>74:53:01:32.&nbsp;&nbsp;Alternative method of determining required absorption trench system area.</b> In lieu of calculating the absorption trench system area according to §§&nbsp;74:53:01:30 and 74:53:01:31, the following criteria in Table 5 may be used for the design of individual or small on-site wastewater systems if the absorption trench system is of an area sufficient for at least three bedrooms. The absorption area shall be determined according to the following table:</font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <h1><b><font size=3 face="Times New Roman">TABLE 5</font></b></h1> <p><font size=3 face="Times New Roman">&nbsp;</font></p> <div align=center> <table border=0 cellspacing=0 cellpadding=0> <tr> <td width=325 valign=top> <h4 align=center><b><font size=3 face="Times New Roman">Percolation Rate</font></b></h4> </td> <td width=294 valign=top> <p align=center><font size=3 face="Times New Roman">Minimum Absorption Trench Area</font></p> </td> </tr> <tr> <td width=325 valign=top> <p align=center><u><font size=3 face="Times New Roman">(Minutes for water to drop one inch)</font></u></p> </td> <td width=294 valign=top> <p><u><font size=3 face="Times New Roman">(Square feet of trench bottom per bedroom)</font></u></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;1 but less than 5 minutes per inch</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">Not permitted--see §</font> <font size=3 face="Times New Roman">74:53:01:33</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;5 but less than 10 minutes per inch</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">125 square feet</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">10 but less than 15 minutes per inch</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">165 square feet</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">15 but less than 30 minutes per inch</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">200 square feet</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">30 but less than 45 minutes per inch</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">250 square feet</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">45 but less than 55 minutes per inch</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">300 square feet</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">55 but no more than 60 minutes per inch</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">350 square feet</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </td> </tr> <tr> <td width=325 valign=top> <p><font size=3 face="Times New Roman">Over 60 minutes per inch</font></p> </td> <td width=294 valign=top> <p><font size=3 face="Times New Roman">Not permitted--see § 74:53:01:33</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; The minimum absorption trench area, as shown in the above table, may be reduced in accordance with §&nbsp;74:53:01:31 when the depth of fill material below the distribution pipe is 12 inches or greater.</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> 12 SDR 2, effective July 18, 1985; 13 SDR 129, 13 SDR 141, effective July 1, 1987; transferred from §&nbsp;74:03:01:69, 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></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-2-20">34A-2-20.</A></font></p> <p><font size=3 face="Times New Roman">&nbsp;</font></p> </div> </body> </html>