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i - �� <br /> , . , .. . <br /> . � � .� . <br /> GRAV�LLESS TRENCH CONSTRUCTION D�T�1LS � <br /> . 1 1/2" Inspection <br /> Iniet" Pipe to Next 1 1/2 Male We11 <br /> Drop Box . Adapter . <br /> .r���� y 12" Soil Backfill ���� <br /> g�j :� - � <br /> ��`�' Corrugated Tubing Covered <br /> with Geotextile Fabri <br /> � - <br /> Drop Box <br /> Tren�:h Longth = up to 100 Feet <br /> Overfill to Allov►� ��S : 1. Bottcm of tr+ nch must be level. Top � <br /> �for Settling of tubing must bs level. . <br /> ---------- � � � - <br /> . � ,� , Soil . ' 12" of �oi! . 2. Sca� ify trench bottom and sidewalls <br /> . ��� <br /> � <br /> Backfil! Backfill at lo�.st 12 inches above trench bottom <br /> 2�' " � ��. . . _ . . . . i _ . . <br /> ' ' ' tc� expose natural soil. � <br /> � � . � <br /> , � 12„ <br /> � , . <br /> . , , � <br /> G'�. ___ _ _ �_� 3. For proprietary �roducts consult <br /> manufacturers performance criteria. <br /> H�les Located � <br /> • 24~ at 4 and <br /> 8 O'Clock � � <br /> , N <br /> V <br />