Resolution No. 4793 - Laserfiche WebLink

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~W~C FACILI-rlES from the WPCF to the SIWF. This pipeline conveys Level II plant water. Improvements to the RWM have been made such that 2,400 gpm (1.24 mgd assuming 8 hours per day irrigation) of effluent could be conveyed to the site. Assuming that grass continues to be grown at the SIWF, the net irrigation requirement is 14 inches. This corresponds to reuse of approximately 0.5 mgd in June, 0.9 mgd in July, 0.75 mgd in August, and 0.4 mgd in September, based on applying reuse 8 hours/day. Advantages: Because the RWM already extends to the SIWF, effluent can be applied at the site almost immediately Minimal financial investment , Rural SIWF site meets all Level II reuse requirements Minor/nspect/on and retrofitting of the sprinklers on the center pivots at the SIWF would be required Disadvantages: * Only provides for 0.9 mgd (maximum) of reuse This alternative would require the following modifications: rerouting of the RWM piping at the SIWF such that effluent could be applied through the center pivots, and replacement of the sprinklers on the center pivots. Estimated Cost: $400,000 Alternative 3 - Level !1 Reuse at the Bioc¥¢le Farm Alternative 3 is to apply- Level II effluent at the BF. The RWM mentioned in Alternative 2 is also routed to the BF pump station located at the BMF. At the BF pump station, effluent is blended with liquid biosolids from the FSLs and then pumped to the BF, where it is applied through hose reels to poplar tree and grass crops. In this alternative a dedicated effluent reuse pipeline would be installed at the BF, parallel to the existing biosolids irrigation pipeline. Assuming an available flow rate of 2,400 gpm, a peak application rate of 0.5 inches a day of effluent could be applied. Assuming 8 hours/day operat/on, approximately 1.5 mgd of reuse could be applied to the BP. A further evaluation between reuse and biosolids applicahon already occurring at the site is needed to ensure that the site is maximized for the biosolids application strategies outlined as part of this Facilities Plan. Advantages: Because the RWM already extends to the BMF, only the effluent irrigation pipeline would have to be constructed * Dilution of biosolids with reuse water increases the biosolids receiving capacity of the BF, thus providing additional program flexibility in the future - Uses the ball potential of the BF as a deal/cared biosolids and reuse site