Agenda - 06-02-2004-9d - Laserfiche WebLink

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~~ However, this technology is more expensive than more conventional technology. Furthermore, the Living Machine -unlike more conventional treatment components - lacks a track record in North Carolina (insofar as state environmental health permit regulators are concerned),. This means an extended system review and permitting time for the Living Machine technology than that required for secondary treatment technclagies and components that are already state approved. Accordingly, staff recommends that the BOCC take into consideration a more conventional treatment system alternative for comparative purposes. A more conventional advanced wastewater treatment technology (designated as Step 4 (to distinguish it from the alternatives in the Innovative Design/Landis report) recommended by , staff recommends of BOCC consideration is one in which a 6000 gpd recirculating filtration component be used in lieu of the Living Machine component. This would provide an advanced level secondary treatment component in a system could be designed by the consultant or by County staff, It could be constructed at a cost savings of $50,000 to $75,000 (compared to Step 3A and Step 3 respectively) and be put into operation in just over half the time needed for a Living Machine system (permitting time is much shorter), This system, while it might not provide quite the same level or quality of treatment as that provided by a Living Machine system, would nonetheless provide a high quality effluent that meets all regulatory requirements (nitrogen, BOD, coliform and suspended solids removal) related to subsurface effluent disposal, Furthermore, County staff has the expertise to operate and maintain this system, which is not the case with a Living Machine system (representing annual out-of-pocket expense savings of $40,000). If we may provide additional information or clarification on this matter, please advise.