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H2O Urban Solutions, Inc. Page 4 Table 1—Drying Bed Capital Cost Item Cost Drying Bed Construction $200,000 Re-routing of facility piping $50,000 Modify chemical systems $25,000 Remove Filter Press $10,000 Total Construction Costs $285,000 Engineering, permitting, CM, environmental $50,000 Salvage Value of Filter Press <$10,000> Total Project Cost $325,000 Since solids drying is not effective during cooler months (i.e. November through March), no solids drying will occur during this period. Coincidentally, production of solids is significantly lower during these periods, as less water is produced and consumed. Existing processes (e.g. backwash tank and solids tank) are expected to have adequate volume to retain and further concentrate solids during the winter. Once LAWTF is at or near maximum capacity (10 to 20 years), the City may prefer to install a second solids tank to enhance the process. The annual operational cost of the drying beds is estimated at approximately$8,000 to $10,000. This includes the cost of labor to clean the beds twice each year, and chemical costs to condition the solids. When the transportation bin rental fees are included, changing the solids dewatering process is expected to reduce operations costs by approximately$55,000 per year. Comparing this to the estimate of the cost of drying bed construction, the payback period is 5.9 years. However, if drying beds are not implemented, the existing filter press will need to be reconditioned or replaced within that period, at a cost of approximately$75,000. Adding this cost to the analysis results in a payback period of 4.5 years. Due to the relatively short payback period of drying bed construction cost, it is recommended that modification of the solids dewatering process be implemented in the near-term. Delays may cause the City to incur the cost of filter press repairs or replacement, and reduce the potential salvage value.