D2 water distribution test Solved 100%

What is the primary purpose of the SDWA? - ANSWER To create uniform national standards for drinking water quality Who sets Maximum Contaminants Levels (MCLs)? - ANSWER USEPA What are some of the duties of the EPA? - ANSWER Sets MCLs, delegates enforcement of SDWA to state agencies, provides grant funds, monitors state activities, provides continued research What is state primacy? - ANSWER Giving the authority to the state to implement and enforce regulations True or False: State requirements must be at least as stringent as those set by USEPA - ANSWER True. A public water system is a system that supplies piped water for human consumption and that has at least ___ service connections or serves ___ or more persons for ___ or more days of the year. - ANSWER 15, 25, 60 What is an nontransient, noncommunity public water system? Give an example of one. - ANSWER Establishments with their own private water systems that serve an average of 25 persons that do not live at the location, but the same people use the water for more than 6 months per year. Example: school or factory What is a transient, noncommunity public water system? Give an example of one. - ANSWER Establishments with own water system and serve at least 25 persons a day but these people only use the water occasionally and for short periods of time. Example: Motel or Park What is a community public water system? Give an example of one. - ANSWER Establishments with their own water supply that serve more than 15 homes. Example: HOA, or municipal water utilities Which of the public water systems are required to only monitor for nitrate, nitrite, and microbiological contamination? - ANSWER transient, noncommunity What does the National Primary Drinking Water Regulations (NPDWRs) specify? - ANSWER MCLs or a treatment technique requirement for contaminants that may be found in drinking water and could have an adverse health effect on humans What does the National Secondary Drinking Water Regulations (NPDWRs) specify? - ANSWER water contaminants that may adversely affect aesthetic qualities of the water such as taste, odor or color When must an agency post a public notification? - ANSWER When the water system violates any of the operating, monitoring or reporting requirements or if they exceed the MCL Lead and Copper Rule (LCR) - ANSWER Requires that samples be collected at customers taps after the water has remained undisturbed in the water piping for at least 6 hrs True or False: system operators are required to regularly collect and test water samples. - ANSWER true True or False: Water quality cannot change after it enter the distribution system. - ANSWER false -blending, season, operational changes What are the 4 methods of collecting samples? - ANSWER Grab sample, composite sample, time composite sample, flow-proportional composite sample What is a grab sample? - ANSWER A single sample at a single location What is a composite sample? - ANSWER A series of grab samples at one place and at different times What is a time composite sample? - ANSWER Equal volumes at regular intervals What is a flow proportional composite sample? - ANSWER Adjusting the sample size proportional to the flow How do you select a sample point? - ANSWER As close to the main as possible True or false: It is required for samples to be taken from groundwater under the direct influence of surface water. - ANSWER true What are Sanitary Surveys? - ANSWER On site annual inspection of a water system's facilities and operation. What are some the requirements that the State establishes to ensure proper water system operation? - ANSWER Operator Certification, sanitary surveys, enforcement What are the 3 main areas of concern to distribution operators? - ANSWER microbiological safety, disinfection by products, lead Total coliform rule - ANSWER to require surveillance of total coliform bacteria When you have a positive sample for coliform you need to take another test within ___hrs? - ANSWER 24