Technologies and Costs for Removal of Arsenic From Drinking Water

3.2.6 Flows Used in the Development of CostsFlow categories were developed to provide adequate characterization of costs across eachof the flow regions presented in Section 3.2.1. A minimum of four flows were used for each of theflow regions, with the exception of the transition regions, where cost estimates are based on a linearregressions between the last data point of the previous region and the first data point of the followingregion. Table 3-11 presents the design and average flows, and cost models used in this process.Each model is used to estimate the cost for each flow. Regression analysis is then used to estimatean equation relating cost to flow for each region.Table 3-11Flows Used in the Cost Estimation ProcessDesign Flow (mgd) Average Flow (mgd) Cost Model0.010 0.0031 VSS0.024 0.0056 VSS0.087 0.024 VSS0.10 0.031 VSS0.27 0.086 Water0.45 0.14 Water0.65 0.23 Water0.83 0.30 Water1.0 0.36 Water1.8 0.7 W/W Cost4.8 2.1 W/W Cost10 4.5 W/W Cost11 5 W/W Cost18 8.8 W/W Cost26 13 W/W Cost51 27 W/W Cost210 120 W/W Cost430 270 W/W CostShaded rows represent data used in the estimation of costs with the transition regions.3-12