PD Background Report (PL-SMA-2022-000025)

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approximately 10,000 CY of the material will be used as fill and soil amendment. In addition to this site, the general contractor has indicated that they could use approximate 2,000 CY at their off -site location. The area to be leveled has minimal archaeological features that may be impacted by the excavation. See SCS, Glenn Escotts' Archaeological Inventory Study (AIS) in section 3 -I — 1 of this application. Portions of an old flume cut will be eliminated. There are no structures within the flume cut, it is a trench through soil upon the hill. Any wood remains of the flume have long been removed or rotted away since cane fluming ended in the early 1960's. 2) Installation of new Wastewater System The existing Wainaku Executive Center was developed for corporate office use and did not require an extensive waster water system. Through CBCL's construction work and SMA-367 an existing cesspool was converted into a leach pit and a contained septic tank was installed ahead of the leach pit. Since then, the Edmund C. Olson Trust No. 2 who acquired the Wainaku Executive Center expanded the restroom facilities however, not to the point of requiring an enlarged septic tank system. The proposed use of the building by Hawaiian Ola Brewing Corporation considered in this SMA application will increase the amount of people visiting the building as well as the envisioned processing actions within the restaurant, bar, and micro - distillery. The waster water system is being designed for the following demand: Restaurant:120 meals per day at 10 gallons per meal = 1,200 gpd Bar: 40 bar seats per day at 15 gallons per seat = 600 gpd Distillery operations: 1,200 gpd TOTAL WASTEWATER PER DAY = 3,000 gpd The system is designed to process 3,000 gpd of wastewater through a multi -stage process: 1. Grease Interceptor, to be placed underground within the vicinity of the excavation work and new parking stalls described earlier. 2. Anaerobic baffle reactor, 5,000 gallon, "stage 1", underground... as above. 3. Anaerobic baffle reaction, 5000 gallon, "stage 2", underground... as above. 4. Lift Pump station, underground —as above. The effluent waters are then transported by underground pipes through the existing Train Tunnel where it is further treated on the property to the North of the tunnel. 5. pH adjusting of the wastewater before the aerobic reactor tanks... 6. Aerobic Reactor tank, above ground, 3,200 gallons, "stage 1" 7. Aerobic Reactor tank, above ground, 3,200 gallons, "stage2" 8. Clarifying settling tank, above ground, 2,000 gallons