A project design will use nonpotable water sources to offset potable water use.

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试卷: LEED v4 ID+C模拟题B卷英文[查看]
A project design will use nonpotable water sources to offset potable water use. A rainwater collection system will store water from the building\'s roof and a storage pond will collect stormwater runoff from the grounds. What is true regarding the project\'s use of the water?
A: The sources should be mixed together prior to using them to avoid treatment of mineral contents
B: The rainwater collected from the roof will require less treatment before use
C: The stormwater from the grounds can only be used for outdoor water use reduction
D: Both sources will need to be submetered

参考答案: B

本题解释:
选择B，本题解释A.Use the source that requires the least treatment first to reduce costs. For example using alternative sources of water for a cooling tower may require additional treatment of the water to reduce the mineral contents. B.Different types of nonpotable water will have different mineral contents. Pick those water sources that have the lowest mineral contents, and thus require the least treatment first, to avoid having to treat the water prior to using it.
Different sources of condensates - air conditioning, steam systems, ice machines - and runoff from a building\'s roof require the least treatment. They have low mineral content. Runoff from the ground may require more treatment because of the pollutants that may be picked up from the grounds (fertilizers, oil, etc.). Graywater may have dissolved solids as well and require treatment. C.The stormwater may require additional treatment but it can be used in the cooling tower. D.The sources don\'t need to be submetered but for WE Prerequisite Indoor Water Use Reduction a makeup water meter is required for the cooling tower.