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R2COMMIMATIONS t We recommend a mound system for your site and we have attached design calculations, a bill of materials and a site plan sketch of the system. The details of the system layout are as follows: Protection - Care must be taken to avoid driving on the mound area. You should rope off the mound area to prevent construction traffic from traveling over and compacting the soil which will make the site unusable for a disposal system. Piping - A 2" pipe from the pump to the center or end of the mound will connect to a 2" manifold pipe as shown in attached detail E12 or E15 and shall be frost proofed as shown in detail F17 where less than 4 feet of cover is provided. This pipe shall be the first thing installed. Preparation - With a tractor backhoe sitting outside the mound area, the surface of the mounk' area shall be broken up using the teeth of the bucket. Washed sand - Deliver truck loads of washed sand outside of the mound area leaving the mound area roped off durinq sand delivery. The quantity of washed sand required is listed in the bill of materials. Use a track mounted tractor with bucket to lay a one foot layer of sand minimum in front of the tractor to act as a cushion for the tractor to ride on while spreading the sand over the mound area. The completed top of the sand shall be level and shall be the minimum sa•-:d layer thickness specified on the design sheet. Outside the rock bed area, slope the sand downward at a 4 horizontal to 1 vertical slope from the top of the rock bed to the existing surface. Rock bed - The dimensions of the rock bed are listed on the design sheet and the number of tons of rock are listed in the bill of materials. The clean, 3/4" to 2 1/2" rock shall be placed atop the level sand surface. Do not drive on the sand to deliver the rock. One way of delivering rock is with a "ready -mix" truck with a long enough chute but the truck must be thoroughly cleaned before loading rock so that no cement remains. Piping - When 8 inches of rock is in place, connect the manifold to the existing pump line and assemble laterals as shown in details E12 or E15 and E14 on *op of the rock. The size, lengths and numbers of these laterals and perforation size and spacing are shown in the attached design and bill of material sheets. Then complete the rock placetr:nt with the remaining 4 inches of rock.