Technologies and Costs for Removal of Arsenic From Drinking Water

costs for small systems is as follows: 40% process costs, 40% construction costs, and 20%engineering costs. For large systems, the breakdown of capital cost is: 30% process costs,40% construction, and 30% engineering.12. The capital costs estimated in the previous step do not include the cost of a building to housethe process equipment and other add-on costs related to the site. Housing costs were assumedfor all sites. Fence and road were only assumed for those systems that have no treatment.Basis. Data from the 1995 Community Water Systems Survey were used to identify thepercentage of systems without treatment (9). The data from ground water systems is asfollows:Table D-1Percentage of Ground Water Systems with No Treatment: Systems Serving # 3,300 PeoplePopulation Category25 - 100 101 - 500 501 - 1,000 1,001 - 3,30043% 19% 16% 18%Table D-2Percentage of Ground Water Systems with No Treatment: Systems Serving > 3,300 PeoplePopulation Category3,301 - 10,000 10,001 - 50,000 50,001 - 100,000 100,001 - 1 MIL13% 1% 11% 0%Larger ground water systems rely on multiple entry points to supply ground water rather thanone well. Thus, treatment may be present in the system, but only at one of the wells. Since theanalysis is based on no treatment throughout the system, using the percentages for largerD-7