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<br /> <br />Bay Area Clean Water Agencies | City of San Leandro Final Report | A-1 <br />Appendix A. Basis of Cost Estimates <br />Allowances for additional construction costs were included using a markup. These allowances are <br />added to the major facility costs to determine the capital cost (see Table 1). <br />The unit costs for power, chemicals, and labor are shown in Table 2. A common unit cost basis for <br />all plants in the study was selected for this analysis. <br />Table 1. Allowanced used in developing the Opinion of Probably Cost. <br />Undefined Items Value <br />Undefined Unit Processes 20% <br />Miscellaneous Site Structures 15% <br />Site Conditions <br />Sitework 10% <br />Yard Piping 5% <br />Soil Conditions 7% <br />Site Electrical Power Distribution 1% <br />Contractor’s Costs <br />Field General Conditions, Mobilization, Demobilization 12% <br />Sales Tax (Allowance) 8% <br />General Contractor Overhead and Profit 10% <br />Bonds and Insurance 1.5% <br />Construction Contingency - Change Orders 4% <br />Soft Costs Engineering 10% <br />Construction Management 10% <br />Legal, Fiscal, Administration, Environmental 5% <br />Contingency to Reflect Current Bidding Climate in the <br />Bay Area <br />15% <br /> <br />Table 2. Unit Costs <br />Unit Unit Cost <br />Power $0.17 per kWh <br />Labor $150 per hour <br />50% Sodium Hydroxide $350 per ton <br />Sodium Hypochlorite $0.43/gal for 12.5% <br />Ferric Chloride $619/dry ton <br />Hydrated Lime $396/wet ton (45% alkali lime) <br />Liquid Alum $0.80/gal <br />Methanol $1.25/gal <br />Citric Acid $6.38/gal or $1.15/lb <br />Polymer (Emulsion) $9.10/gal which is $1.07/lb <br />