Agenda - 09-02-2003-6c1 - Laserfiche WebLink

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9 station located on the portion of the property on the east side of NC 86 (purchased solely to accommodate the expanded wastewater treatment system). It was readily apparent that the flow control/wastewater storage pump station, the pre-treatment unit, the dosing pump station (providing flow control and pressure for the wastewater being discharged to the nitrification field) and the nitrification field would be best located together for operational efficacy. Furthermore, we determined that it would be advisable to locate those treatment units where the consequences of a system malfunction (possibly entailing a wastewater spill) could be isolated at a point remote from the playground area for the facility's daycare population (as well as others involved in recreational and outdoor use of the facility). Lastly, we determined that this type of design layout would provide for the prolonged operation of the existing wastewater system with minimal interruption of activities at NHSC and of the service provided by the existing treatment system. The BOCC has recently approved the award of a contract to a surveying consultant for the entire NHSC and park complex. The contract itself has not yet been finalized and a notice to proceed has not yet been issued. The consultant's proposal has indicated that the time frame for all work covered by the contract will require approximately 60 days to complete. Environmental Health staff have scheduled the detailed soils investigation for late September and submission of the first phase of permitting documentation (as relates to soil types, site wastewater flow absorption capacity, etc.,) by mid-October. During that same time frame, Engineering staff will be preparing the generic portions of the construction documentation (that portion not related to actual specific design parameters such as pump pressures, percent recirculation, etc.,) during the same time frame. The process of designing the actual layout of the distribution lines in the nitrification fields, new septic tanks and other treatment components cannot be initiated until the survey field data (locations, topography, property lines, etc.) are in hand. Assuming this data is in hand by the first of November, the remainder of system design, permitting, bidding, contract award, etc., should be complete in time to coincide with the optimum construction season (mid-spring, 2004). Depending on the time frame required for equipment (pumps, instrumentation, controls), the system should be completed by late summer or early fall 2004. This, of course, assumes that the information about grant funding (and a definitive decision related to the suitability/efficacy) for "Living Machine" or similar innovative pretreatment technology is available by early November. Delays in the decision to use either "Living Machine" type or more conventional pre-treatment technology beyond mid-November will proportionately delay the ultimate completion of the project. If I may provide additional information or clarification about projected timetables, wastewater treatment technologies, etc., at this time, please advise.