Water Distribution manager 1 exam review/flashcards Correct 100%

What is the maximum disinfecting residual for chlorine - ANSWER 4ppm (mg/l) Primary health effect associated with nitrates in water? - ANSWER "Blue Baby Syndrome" (methemoglobinemia) Maximum contaminate level for fluoride - ANSWER 4ppm (mg/l) Maximum contaminate level for nitrate? - ANSWER 10mg/l (ppm) What is the "trigger" level of nitrates - ANSWER 5 ppm (mg/l What two elements are associated with water hardness - ANSWER Calcium & Magnesium Which sampling event involves obtaining the results by calculating the 90th percentile? - ANSWER Lead & Copper Primary MCLs are? - ANSWER Primary MCL= Health concern Secondary MCLs are? - ANSWER aesthetic concerns (Taste, odor, color, etc.) What is the ph scale? - ANSWER Acidic 0 -14 Basic What is the white powder in bacteria sampling bottles? - ANSWER Sodium Thiosulfate What is the purpose of Sodium thiosulfate? - ANSWER Used to deactivate chlorine sample What is the static level in and aquifer mean? - ANSWER The level that the aquifer sits at when the pump is shut off What is the Draw down in an aquifer? - ANSWER The difference between the static level and pumping