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40r�c ­ <br /> ad r +^ �+ .` z� a aA - a <br /> �c _ a;'`� � °��� �, 'fit �€ �'��°'� �, � <br /> �'�� a +, <br /> 6. Where required by local code, a splash plate shall be place under the inlet end of the chamber. Each end cap <br /> is equipped with splash plate receiving pockets. Place the splash plate into the positioning fins prior to end cap <br /> assembly. <br /> 7. Where required, connect serial or manifold lines of <br /> the chambers in the same manner as described in ` �, <br /> steps 4 and 5 above. <br /> 8. The post end has small knockouts located on the roof of <br /> each chamber. When removed, these knockouts allow for ,t <br /> the use of zip ties or straps in order to hang pressure-dosing <br /> pipe. Where pressure-dosing pipe is used, end caps should <br /> be prepared with a hole saw to adequately accommodate <br /> the outside diameter of the PVC dosing pipe. <br /> t <br /> Knockout <br /> 9. An easy-knockout inspection port is provided in each Arc 18 and 24 <br /> chamber. Once the knockout is removed, the resulting opening will <br /> accept 4-inch SDR 35 (4.215" O.D.)or 4-inch Schedule 40 (4.5" O.D.) <br /> pipe. The Schedule 40 pipe may require moderate coaxing with a <br /> rubber mallet. <br /> 10. Fill sidewall area to top of chambers with native soil (or select fill <br /> where required). Fill shall be compacted to the minimum <br /> requirements necessary for the soil type used. "Walking in"the <br /> soil is one acceptable means for achieving the compaction level <br /> along the sides of the chamber. <br /> 11. Complete the backfill of the system with native soil or select fill to the =� <br /> depth specified in the system design and as required by state and local ` <br /> codes. Avoid large rocks and debris in backfill material, as they may <br /> eventually impinge on the chamber. As common practice, avoid driving <br /> any equipment over the Arc chambers prior to final backfill. Where <br /> vehicular loading will be anticipated, all Arc 18 and Arc 24 chambers are <br /> approved for H-10 (16,000 lbs/axle) loading when installed with a " <br /> minimum of 12 inches to a maximum of 8 feet of cover after <br /> consolidation`. <br /> 12. When preparing the final grade, grading shall be such that stormwater is diverted away from the drainfield. <br /> System final grade should be crested or sloped, never left flat or concave. Channel storm and downspout <br /> water away from the drainfield. Final grading should be slightly to moderately limited soil to help maintain an <br /> www.arc-chamber.com 3 <br /> AIG802 ©ADS 2008 <br />