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n ! ; TEST SUMMARY • ' SYSTEMS I N C Effects of Fine Uniform Sands On Environmental Onsite Wastewater Solutions Septic Drain Field Products September 2005 An Infiltrator® Systems Inc. (ISI) laboratory After each configuration was tested,the samples were study determines that Quick4®chambers completely flooded with clean tap water to represent the flow of effluent into the system.The introduction of out-perform traditional aggregate systems water to the sample was done through a small valve while preventing fine uniform sands from that was built into the test box.once each configuration was entirely flooded,the fill hose was removed from the entering essential void spaces. valve and the configuration completely drained. The Quick4 chambers'modified sidewall was designed to Note:Angle of repose remains out-perform traditional aggregate systems by reducing constant withineach chamber the potential of intrusion of fine uniform sands. Low configuration ra cohesion and internal friction properties may cause fine o uniform sands to intrude into void spaces of drain field AZ products. The Quick4 chambers' sidewall openings (Figure 1) allow soil to rest at a more stable angle of repose within the sidewall louver openings. k"_r? The goal of the winter 2004/2005 study was to determine if fine uniform sands could adversely affect the performance fand potential life expectancy of the tested drain field prod- ucts by reducing volume storage and infiltrative surface g ' area. It is important to note that this test procedure Q `\ emphasizes extreme conditions of quick filling and draining p \ of the drain field product. o Quick4"Standard Chamber The Quick4 Standard chamber and traditional aggregate Q system were tested individually in a Plexiglas'test box Figure 1: Chamber sidewall manufactured by ISPs•R&D Department.. The test box is 24" long by 18" wide b 20" tall and represents one-half Backfill sample y p _....._-'-'----.—...--___.�.._...� �.__-'-'-'---�-�-Sand ._�..-.-.--'--_..-----_.........._..__,..,.pines-- Gravel ----------- of a 3-foot wide trench. A rigid plastic divider was used to separate 100 34 10, Bin. No,4 No,11 N, 1B No,30 No.5011o.100 No.200 the fine uniform sand backfill i material from the traditional aggregate system.This was done sn i to prevent immediate infiltration of the backfill into the test sample before the test began. No divider was used when testing the ISI chamber products. The backfill material used for testing 40 was a dry,fine, uniform sand.A a i gradation report is shown in Figure 2. The sand was poured into the test 1 box to the prescribed height. No 20 compaction took place after the placement of the sand backfill. When installing chambers in the 0 field, it is important to "walk in" , o; oa o o, and stabilize the loose backfill material around the chamber I ' sidewalls in accordance with -20 Grain Diameter(mm) vfiNralrx sysre—w. Infiltrator's installation instructions. rs«mk iserflo parrm„ Figure 2: Gradation.report Text and pictures based on Infiltrator Systems'Soil Intrusion Video.To request a copy of this video contact Infiltrator Systems Inc.at 1-800-221-4436.