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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)
Skid resistance of wearing course Skid resistance of wearing course in a bituminous pavement is contributed by macro texture (which implies the general surface roughness) and
SIMPLE STRESSES AND STRAINS: The concepts of strain, stress, elastic modulus & the basic concepts in application to analysis of deformation and stresses in simple solids. Any
Q. What do you mean by GGBS – cement replacement? From structural point of view GGBS replacement enhances higher durability, lower heat of hydration and higher resistance to su
Q. Principle of airlifting for cleaning pile bores? Airlifting is generally carried out before concreting to remove debris and clean the base of pile bores. It basically acts a
I am a Civil Engg student. Why CBR Values determined only at 2.5 and 5 mm penetration ?.
Quality Control in Flexible Pavements: The quality control needed for Flexible Pavements covers the following tests : (a) Density and Moisture content of sub-grade. (b)
need help with my assignment. An Asian Pacific capital city proposes to design, construct and operate a new double track railway from the city to connect to its major airport. Pref
Define Dupuit Equations for Unconfined Aquifers Using natural log: Q = ΠK((h 2 ) 2 - (h 1 ) 2 )/ln(r 2 /r 1 ) Using log 10 : Q = K((h 2 ) 2 - (h 1 ) 2 )/((1,055)l
how do I draw sections(longitudinal and cross sections)?
Explain the term - Prestressing Force Due to the stretching of tendons, tensile stresses develop inside tendons. Resultant prestressing force in tendons may be calculated by m
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