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U Excc]vate and level 3' wide trenches, <br />~}1 Prepare trench bolforn and sides in accordance with <br />state and local regulations. (Infiltrator Systems recommends <br />raking sidewall and bottom infiltrative surfaces to eliminate <br />smearing) <br /> <br />~1 Screw splash plate on bottom of open end plate, <br /> <br />D Screw open end ptafe info inlet end (without interlocks) <br />of first INRI_1T~ATORTM chamber with splash plate extending <br />~nto unit. <br /> <br />U Screw closed end pIate in dowesfream end of last unit <br /> <br />~[bt Place first unit In the inlet end ef trench with interlocks <br />downstream, <br /> <br />~1~ Run distribution pipe through Inlet opening in end prate <br />but not beyond splash plate. Single screw may be used to <br />hold in place, Plbe do~s not normally run the length el <br />system, <br /> <br /> M Slip INFILI~ATO[~TM <br /> units together, fully en- <br /> gaging interlocks to f~rm <br /> desired trench length. <br /> <br /> a. To keep joints from <br /> COming apart during <br /> Construction and for <br /> maximum strength - joints <br /> may be SCrewed together <br /> with 4 self drilling sorew~. <br /> <br /> b, Trench grade can be <br /> checked with a level or <br /> surveying equipment. <br /> <br />to hold in place, NOllE; For serial distribution, or to loop the <br />trenches together, use on open end plate at the down- <br />stream end of the trench, and run a pipe from fha opening <br />to the next french. <br /> <br />~'~ Fill side wall area to <br /> <br />top of slots with native soil, <br />"Walk" till into place to <br />give proper support of <br />sides. THIS IS Vl~RY <br />IMPOR'/ANf TO ACHIEVE <br />FULL $1RENGTH, <br /> <br />~] Backfill fo a minimum <br />of 12" of cover after <br />compaction and settling <br />for H-10 units and 18" for <br />H-20 units. Avoid large <br />recks in the backfill <br />ferioL CAUTION: Avoid <br />vehicle traffic on system <br />during construction since <br />soil has not settled. This is <br />particularly important in <br />sand, since loose sand <br />offers very little structural <br />supped, Most states advise <br />avoiding vehicle traffic to prevent compaction of the Infil- <br />trative surface. (After proper depth of cover is compacted <br />and sortied, INFIL1RATORTM leaching chambers will then <br />support vehicle weight not to exceed 16,000 lbs, per axle for <br />H-tO units and 32,000 ihs. per axle for H-20 units,) <br /> <br /> <br />