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Trench rock covered-.,with permeable, <br /> • • Earth backfill synthetic fabric <br /> above top of rock <br /> Pipe to next 4" diameter inspection <br /> drop box . <br /> a well with cap <br /> .• / <br /> Alt, Ali, alt, all, <br /> / alt,r= All, <br /> _ <br /> xi MINIIMIF <br /> =MN (;) lir ; • Niqinoit <br /> ter= u = — — t> <br /> �8" M111.11.1.011.11.11111 .10....V <br /> lnle �OG•5-� 4" Distribution -• •e , --o_- <br /> _ __ -.: _ -_=:- o <br /> rrock h3/4"c(to 2 1/2" . l0 � E�e,i s skoon Is+ <br /> Drop box dia. See note 5. finctl ordc. <br /> 3@ Length •= S/3 feet <br /> ,gg hl/f/ gi i4/ _ <br /> • Notes: 0 erfill." <br /> 1. Bottom of trench must be level. top of trench 4yto 6 4" diameter inspection <br /> rock must be level. � well with cap <br /> 2. Slope on distribution pipe is between level <br /> and 4• inches per 100 feet recommended „ <br /> slope is level. '���=-u bakfillerforated lastic. stribution ppcnep P 1I!_1h501'-, <br /> pistolled with oPi row ust halt' along <br /> l bearing ==-----o== - - " Depth of rock <br /> pipe bottof at least 1000 Ib�ft. �1;_ �ti+. aboveppipe <br /> • strength " o _ <br /> ' :: o:: -8 Rock below pipe <br /> 4. Scarcify trench bottom and sidewalls as <br /> high as rock will be placed in the. trench • 0_:-_ see note in order •to exposed natural soil. Remove , _ _< . „ „_, <br /> loose soil before placing rock. u—u—u—n—u—iririrn=- <br /> ' 5. Where trees are present 'xbf likely to be I <br /> • present during the life of the system, 36" <br /> 112 inches of rock must b_a place under <br /> • the distribution pipe. ' <br /> Trench Construction Details <br />