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Installation Guy Vie: AdvanTei -AX Treat n nt Systems Step 2 Excavating Hole for Processing Tank and AdvanTex Filter a = - Step 2A: Determining Elevations f: Before excavating the holes for the tank or filter, consider the elevations required: The 2" Filtrate Return Line should be sloped a minimum Minimum 1.5„ of 114” per foot. If the Filtrate Return Line is less than 6' long, provide a minimum of 1.5" total elevation difference " between the outlet of the filter and the inlet of the RSV. The top of the AdvanTex Filter should end up approximate- Fiilrate Return Line Length ly 1" to 2" above finished grade. Take into account any Determiningelevationsof filtrate return line planned or proposed landscaping that might affect the fin- ished grade of the system. , �+k i `F: i-f;: Step 213: Outlining Excavation Area Outline an excavation area (with chalk, paint, string, etc.) i for both the tank and AdvanTex Filter. Excavate the hole ti tom . .wt for the tank per the tank manufacturer's recommendations. ', Make the hole for the AdvanTex Filter approximately 12" Aft 6 s s" wider and longer than the footprint of the AdvanTex Filter. 4 1 If the filter is going to be placed over the top of the tank, - very little excavation may be required beyond the excava- tion of the tank hole. ., Step 2C: Excavating Hole g` Excavate to the proper depths as determined above for proper elevations. Make sure the bottom of the excavation Y �} is free of debris, especially rocks and other sharp objects. s. .. If the bottom of the excavation is uneven or rocky, lay ` down a 3" bed of sand or pea gravel to create an even, smooth surface. Y Beginning excavation for processing tank ©2001 Orenco Systems" Inc. EIM-ATX-AX-1 Information s"hject to change without notice Rey 1.4Bl01