These options include, inter alia, various configurations of treatment works size and treatment process, connecting pipework, storage reservoir provision and pump installations.For the 16 potential development areas considered, 190 possible options were costed on a comparative basis*. The range of comparative costs, as identified in Table D6.1 of the Environmental Statement, including capital and operating costs over the lifetime of the works, ranges between £85 million and £130 million.* It should be noted that it is normal practice in the consideration of alternatives to consider comparative costs and not absolute costs.