STORMTREAT SYSTEM
Installation Procedures

1. excavate an area approximately 10 feet by 10 feet and to a depth of approximately 5 feet (and more specifically to an level of one foot below the design elevation for the bottom of the units) for each StormTreat System unit. Excavate additional areas for inflow and discharge pipes (specific to the design plans).
2. pour a stone (approximate 3/4-inch diameter) base and level to the base design elevation of the floor of the STS units.
3. lower StormTreat System units into place using sling hanging from a backhoe or, in sensitive areas, place by hand with crew.
4. connect inlet and outlet/discharge piping and outlet control valve (PVC ball valve is recommended). If outlet cannot be "daylighted" an access well should be placed for the control valve.
5. carefully fill wetland container with"rice stone" (1/8 to 1/4 - inch diameter) alternating (at one-foot depth intervals) with backfilling excavation (outside unit) with 3/4-inch diameter stone. Note: it is important the rice stone be naturally sorted (sometimes referred to as "bank run") or is carefully washed to eliminate "fines". Crushed stone commonly has high fractions of "fines" which may cause clogging of the wetland portion of the treatment system.
6. plant wetland plants (provided from nursery as "plugs", approximate size of 6 inches in height). Wetland plant species may vary by region and local sunlight/shade and salt/fresh conditions as advised by nursery. However, we recommend bullrush and woolgrass (Scirpus) as generally adaptive to most conditions. Consult with local nursery for recommendations for other species.