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® the capacity of the existing nitrification field cannot be permitted (from a regulatory <br />standpoint) with an application rate greater than its current rate (2400 gpd with existing <br />lines, less if lines are removed for the front drive) given the age of the system and <br />building utilization that includes food preparation activities <br />wastewater flow records for the existing system show average peak flows in excess of <br />3760 gpd for more than 90 consecutive days (1/24/03 through 4/24/03) <br />flows associated with or generated by the expanded use of the facility, park use or <br />potential development of park and ride facilities far exceed the projected 3000 gpd <br />® significant components of existing peak flow appear to include leaking plumbing fixtures <br />(toilets continuing to run after flushing), extended building use (athletic events) and <br />ground water inflow/intrusion during prolonged periods of wet weather, While providing <br />water efficient fixtures will significantly reduce normal water use, it will probably not <br />eliminate fixture malfunction, nor will it address inflow problem, much of which results <br />from aged and inaccessible wastewater lines (under building slab) <br />Additional issues that are non-regulatory that staff believe would not support the <br />implementation of Steps 1 and 2 are: <br />use of the existing nitrification field planes significant limits on use of the facility's front <br />lawn area (for example, constructing a cira~Iar drive for easier and safer drop-off/pickup <br />of seniors or young children; 15 minute parking; a more welcoming front entrance/fagade <br />that faces the public, <br />given the nature of and demands on the County's ability to plan and fund major capital <br />projects, it may be increasingly difficult to fund additional system expansion/improvement <br />in the future,. <br />County staff has determined that the consultant's proposed Step 3 could be a viable option to <br />provide for an expanded use of the facility, Step 3 provides an expanded capacity wastewater <br />treatment system at the NHSC, because it includes a 6000 gpd treatment and subsurface <br />disposal capacity, but there is; however, some question about the need to provide the 4-day <br />12,000 gpd flow equalization component that the consultants include, <br />County staff believes that a system providing a 6000 gpd treatment capacity will be sufficient tc <br />address average daily flows of 3000 gpd as well as short-term (heavy facility use) and long-term <br />(infiltration) peak flows without the use of a flow equalization component, <br />As a result of analysis, County staff recommends that the BOCC consider approving one <br />of the following options: <br />A modified version of the Step 3 system, or what staff refers to as Step 3A, providing <br />a 6000 gpd treatment (septic and secondary treatment systems) and subsurface <br />disposal (on the Vincent property) capacity but omitting the 12,000 gpd flow <br />equalization component; <br />OR <br />