SU0002274 - Laserfiche WebLink

Home Browse Search

AUG- ,-„ MON 8: 18 AM 7-H TECHNICAL SVC GRP FAX NO. 53027322,0 P. 6 the orfices and blocking the flow. Hence, the useful life of the emitters is upward of twenty (20)years or more. This is a significant item when dealing with other effluent disposal concepts that are below the ground surface_ 5. Additional Operation and Maintenance savings are realized with this system through the use of 7-H's Computerized Plant Control Panel(TC2K)which would be included in this system. There would be zero day to day operation as the system would be controlled by"moisture sensors" and"auto valving". This control results in maximizing area run times without failure. 6. This method of effluent disposal/water re-use replaces part of the potable water requirements designed for irrigation. An excellent water conservation tool. From an overall economic and technical standpoint, 7-H would recommend this system of effluent disposal/reuse for the Olmsted Project. Dry Well Inclement Weather System: It is proposed, (although it may not be necessary)that a Dry Well system be utilized during inclement weather periods for short duration's. The sub-surface irrigation system operates well up to a soil saturation of about 95%. For the most part when considering the clay load and sand soil, this saturation may not even be reached during rainfall periods. Should they occur however, it is proposed that the effluent will be diverted to six(6), five (5) foot diameter by twenty-five foot deep dry well pits. Moisture sensors monitored by the TC2K Computerized Control Panel will automate the change over during these periods. With the ground water at approximately 50 feet and nitrogen reduced, intermittent discharge to dry wells should not be a problem. Again, with only ten (10) inches of annual rainfall, it is doubtful that they will even be needed. However, as a safeguard, the County may require them. Systems Locations: One of the reasons for the selection of sub-surface irrigation as indicated previously in this proposal is the protection of public health by having zero surface discharge and zero exposure to effluent spray during a reclaimed water usage program. It is proposed that the placement of the initial treatment plant and the later coming plants be placed in the Phase#2 Area adjacent to the proposed storm pond. Of course the appropriate setback requirements from the storm pond will be maintained. In addition, it is proposed that the same adjacent area be utilized for the subsurface irrigation. Total land area for the ultimate build out to 50,000 gallons per day treatment and disposal would be approximately, and no more than four(4)acres. However, the land is not lost with no use. With the subsurface disposal concept, this area could be a"public park" with public access and/or Soccer and softball fields. Other areas that could be utilized for effluent subsurface disposal could also be dedicated"park strips" or"green belts" through out the tract area. These of course would be more expensive due to pipeline distances etc. Project Cost Estimate: 5