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PVC pipes were cut and assembled using tee fittings, then connected to an outflow valve. The assembled system was brought to the shop for drilling, where 1/16-inch holes were made along the top and both sides of the PVC pipes. Detailed information regarding component specifications can be found in the design package, including cut drawings and PVC channel diagrams with hole locations and dimensions clearly indicated. PVC cement was applied to secure the connections between the pipes and fittings.
Prior to connecting the drainage system to the outflow valve in the tank, a layer of bentonite was placed at the bottom of each tank. The pipes were wrapped in nonwoven geotextile fabric to prevent sediment from entering. Pea gravel was added around the drainage system to provide structural support. A layer of landscape fabric was installed between the pea gravel and the biomixture to maintain separation of materials. Finally, the appropriate biomixture was placed on top.
Figure 1. Markings for cut on PVC
Figure 2. Cutting PVC
Figure 3. Cut PVC pipes
Figure 4. Built drainage system
Figure 5. Drainage system perforated with holes and connected to tank
Figure 6. Sand biomixture front view
Figure 7. Sand biomixture side view
Figure 8. Woodchips biomixture front view
Figure 9. Woodchips biomixture side view
Figure 10. Logging residue biomixture front view
Figure 11. Logging residue biomixture side view
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