Minutes 05/11/1982 - Laserfiche WebLink

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r', :, ~c . 'c \;_ i "!',) MAY 11, 1982 TUESDAY Upper Smith River Plant expansion, the City could meet its wastewater treatment requirements to the year 2005. Estimated cost of Alternative 2 was set at $1,186,000.00, excluding the City's cost to participate in the HCPSA facility expansion. Because of more stringent treatment required under this proposal to comply with the existing permit con- ditions, operating costs can be expected to increase markedly. Alternative 3 - Expand the existing plant to 8 mgd and obtain a new NPDES permit (to increase the allowable poundage). By making this expansion and participating in the HCPSA Upper Smith River Plant expansion, the City could meet its wastewater treatment requirements to the year 2005. No distinct advantages over Alternatives 1 and 2 were envisioned and, in addition, Alternative 3 would not lend itself to an orderly expansion to 12 mgd in the future, if required; there- fore, Alternative 3 was not pursued further by Wiley & Wilson and no cost estimates therefor were compiled. Wiley & Wilson's supplemental report then offered the following conclusions and recommendations: CONCLUSIONS 1. Since the plant over the past two years has approached 95% of design flow and is presently 80-to-85 percent of design flow, additional capacity is required. 2. The average daily flows Monday-through-Friday for the past several months have approximated 90% of the design flow. 3. Implementation of the interim improvements now under con- struction will serve to alleviate the solids loadings in the plant and serve to increase the capacity of the gravity thickeners and the detention time in the existing digesters to approximately 15 days (to insure abatement of odors). 4. The City's plant, if expanded to 8 mgd, can treat all pro- jected City flow and the present HCPSA allocation for ten years, or for 20 years if the City's Jones Creek flow is diverted to the PSA's Upper Smith River Plant. 5. The City's plant, if expanded to 9 mgd, can treat all pro- jected flow and the present HCPSA allocation until the year 2000. RECOMMENDATIONS 1. Submit this supplemental report and the NPDES permit application to the State Health Department and to the State Water Control Board, respectively, for their review and comments. (Council was informed that meetings of and with the various entities involved are being scheduled.)