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E-14 <br />TEE TO TEE LATERAL -MANIFOLD CONSTRUCTION <br />Topsoi I <br />Loamy Sand Backfill <br />Manifold <br />12- I nch Layer of <br />Clean Sand <br />Grass Cover <br />Hay or Straw Covered <br />by Layer of Red Rosin <br />Paper (or nylon fabric) <br />Perforation in Cap Near <br />Crown of Pipe <br />Perforations at Lateral <br />Invert <br />Rock Layer <br />