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9 <br />3 <br />f. <br />BENEFITS; <br />TREVIRA* Sounoond allows .vater Tiovemen: <br />in vertical direction wmie retaining an son. <br />SOLUTION II: <br />Place TREVIRA SpunDond Cenind wail com­ <br />posite and along natural ground soil to form an <br />envelope. <br />Backfill <br />Block-^ _ <br />»• JL- ‘ Jmm0 o <br />Weep hole Gravel <br />Trevira^ <br />Spunbond <br />Collector <br />PipeFooting <br />Figure 12 — TREVIRA SounDond for Retaining '.Vails <br />BENEFITS: <br />TREVIRA Spunbond allows water movement in <br />vertical direction and also when used with <br />stone aggregate, reduces ground water <br />pressure while allowing no contamination of <br />aggregate by backfill or natural ground soil. <br />8f82 Rev. 2/83 <br />GRASScD AREA <br />PROBLEM: <br />Maintain vertical c.-ai.-age wnile sustai.ung <br />ceasing grass cover. <br />SOLUTION: <br />place TREVIR.A Scu.-ccca on graded earth. <br />Place crushed pea gravel (4 inches m depth) <br />over the lower layer of TREVIRA Spunoond. <br />Place the second layer of TREVIRA Spunbond <br />over the smoothed pea gravel surface. Spread <br />toDSOil evenly over the upper TREVIRA Spuh- <br />bond, grade, soil condition and seed. <br />'ODSOil <br />■». *• <br />0 * <br />»* ■ ♦' * *. /.!»'• '•'* ' ’ .y A*' ** <br />P«a Gravel <br />2*I04’ <br />Sounoond <br />\ <br />Collector Pioe <br />Tfevira^ SounDond (Ootionai) <br />Figure 13 — TREVIPA Scuncona lor Grassed Areas <br />BENEFITS: <br />Provides uniform drainage for establishment of <br />grass cover. <br />LA-5