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Define Surface Water Treatment Rule (SWTR)
SWTR sets forth primary drinking water regulations requiring treatment of surface water supplies or groundwater supplies under the direct influence of surface water.
a. Require filtration, and/or disinfection (to satisfy the MCLs for turbidity and microorganisms)
b. Turbidity limit (should be less than 0.5 NTU in 95% samples for direct filtration (may vary from state to state and when different filtration is used)
c. Disinfection (99.9 or 3-log removal for giardia or 99.99% or 4-log removal for viruses for filtered or unfiltered water systems)
Define Reactivity - Hazardous Waste - Undergoes violent Change w/o detonating - reacts violently with water - Forms potentially explosive mixtures with water - generat
expressions for calculating corrections for earth curvature
Define the Combustion of Solid Waste? A chemical reaction in which the elements in fuel oxidize in presence of excess oxygen C → CO 2 , H → H 2 O, S → SO x , N → NO x
spiral curves?
Explain Hardness - Water Softening 1) Hardness is used to characterize a water that does not lather well, causes a scum in the bath tub and leaves hard, white, crusty deposits
Question What are the key problems if use pumping for concreting works ? Answer In pumping operation , force exerted by pumps have to overcome friction involving concrete an
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beam
What is WBM road. How it is constructed?
Construction of Embankment: The following steps describe embankment construction : (a) The ground is cleared and grubbed and all vegetation, grass, roots, etc. are removed
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