ARCHIVED REPORTS_DRAFT ENVIRONMENTAL IMPACT REPORT

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increased sewer connection fees assessed to future residential and non-residential customers. WQCF effluent mass loading to the San Joaquin River at the currently permitted 9.87 MGD Once a fixture customer becomes a current ratepayer,he will pay the current monthly sewer rate (ADWF)level as WQCF discharge capacity increases to 27 MGD(ADWF)will bring total assessed to all customers in a specific rate category at the time of his connection. A consolidated monthly fees to$37.96 for the effluent-to-land disposal alternative and to$52.53 for the MF/RO assessment of alternative control measure costs to WQCF ratepayers in terms of overall alternative(see Table 53). As stated earlier,the estimated residential monthly fee increases will economic impact to the WQCF service area is provided in the following section(Modeling of only support repayment of approximately 22 percent of the total cost of an alternative. The Economic Impacts on the Community). estimated$455.52 and$630.36 annual sewer fees(for effluent-to-land disposal and MR/RO, respectively)shown in Table 53 only apply to existing residential ratepayers and do not consider Table 52: Estimated Annual Debt Service assessed to Current Non-Residential and All Future the added economic hardship to future home buyers due to increased home prices associated with Ratepayers in WQCF Service Area increased connection fees levied against new development. Depending on how quickly Annual Debt Service by Altemative(') Manteca's population grows and how many years the City ultimately decides to amortize a project's cost over,the cost of supporting repayment of approximately 38 percent of an Service Effluent-to-Land Microfiltration and Debt alternative(see Future Residential Users Group in Table 46)could translate into significantly Ratepayer Group Disposal Reverse Osmosis Revenue Source more expensive home prices in Manteca as compared to neighboring cities,thus having a Current Non-Residential $1,100,000 $3,600,000 Increased monthly sewer fees negative affect on the City's growth. Future Residential $3,000,000 $9,500,000 Increased connection fees Future Non-Residential $2,000,000 $6,300,000 Increased connection fees Table 53: Comparison of Current WQCF Treatment Cost to Estimated Costs of Alternative Control (1)Debt amortized over a 20-year period with an annualization factor of 0.08718. Measures Increase in Monthly Annual Treatment Cost Socio-Economic Impacts to the WQCF Service Area Treatment Level Residential Fee Residential Fee above Current Level Socio-economic impacts to the WQCF service area as a result of implementing an alternative Current Treatment $31.40 $376.80 — control measure are assessed at two levels: (1)impact on individual households due to sewer fee Effluent-to-Land Disposal $37.96(') $455.52(') 20.9 increases,and(2)impact on the community based on a modeling of key economic indicators. As Microfiltration/Reverse Osmosis $52.53(') $630.36(') 67.3 stated earlier,the estimating of alternative control measure costs and impacts to ratepayers in the (1)Estimated fee. WQCF service area was made in present worth dollars(as of March 2007)and applied to the City's most recent population estimate(65,076 residents as of January 1,2007)as a means to reduce the total number of assumptions made in the course of making the estimates. This Modeling of Economic Impacts on the Community strategy avoids the uncertainties associated with an estimate based on future population growth An economic impact analysis traces spending through an economy and measures the cumulative in and around the City,future construction costs,and the precise timing of alternative control effects of that spending. The impact region can be an entire state,one or more counties,a single measure implementation. While it is true that alternative control measures,if pursued,would not city,or any segment of the population representing a semi self-sufficient economic unit for be implemented until 2012 to 2017,and projects costs would be greater at that time,household which relevant economic information exists. The current economic impact analysis evaluates the incomes and the total number of ratepayers asked to share the expense of an alternative would potential impacts to the City due to an increase in annual sewer fees that would be needed to also increase,thus maintaining the relative economic burden of an alternative control measure finance the two alternative water quality control measures presented in this section. An relatively constant over the next several years. The economic impact analysis software used to economic impact modeling software package,IMPLAN (IMpact Analysis for PLANing) model economic impacts to the WQCF service area due to the implementation of alternative Version 2,was used to estimate the socio-economic impacts of increased sewer fees on City control measures relies on the distribution of wealth in the community and the spending habits of residents from a broader perspective,beyond the single economic metric of an annual rate Manteca's citizens in order to project changes in several key economic indicators. The current increase. IMPLAN®is a widely accepted model that has been used by the US EPA,the distribution of wealth,spending habits,and overall economic health of the City are not California Department of Water Resources,USDA Forest Service,and USDI Bureau of Land anticipated to significantly change in the next five to 10 years,further supporting the use of 2007 Management. IMPLAN®is an economic impact assessment modeling system that allows the project cost estimates to assess the general economic burden imposed by the implementation of user to build models to estimate the impacts of economic changes at state,county,or community effluent-to-land disposal or MF/RO on the City. levels. For the current analysis,economic data specific to the Manteca were obtained from the Projected Increases in WQCF Residential Rates with Implementation of Alternative Minnesota IMPLAN®Group,Inc.(MIG),based on zip codes within the City(95336 and 95337). Control Measures The WQCF service area's current residential monthly sewer fee is$31.40. Monthly residential sewer rate increases estimated for the two alternative control measures necessary to maintain City of Manteca Antidegradation Analysis 107 June 2007 City of Manteca Antidegradation Analysis 108 June 2007