Environmental Engineering Exam 2 – Study Guide, Review & Practice Questions
Design of a Water Treatment Plant (WTP) starts with the knowledge of: - correct answer
✔✔Related regulations
Sources for potable water
Water quantity/demand analysis
Source water characterization
Treatment processes
Safe Drinking Water Act - correct answer ✔✔Mandatory federal law for protecting public
potable water supplies from harmful contaminantsDoes not protect private well or spring
waterPrimary Standards to protect tap water by setting maximum contaminant levels (MCLs) for
naturally occurring and man-made chemicals/contaminantsSecondary Drinking Water
Regulations: Nonenforceable guidelines regulating contaminants that may cause cosmetic
effects (such as skin or tooth discoloration) or aesthetic effects (such as taste, odor, or color) in
drinking water
EPA primary standards SDWA - correct answer ✔✔Identify contaminants that occur in drinking
water and may affect public health
•Determine a Maximum Concentration Level Goal (MCLG)oNo known or expected health risk
oNot enforceable
•Specify a Maximum Concentration Level (MCL)oIntended to protect public health
oHas to have a feasible best available treatment technology
oEnforceable
•Or, set a treatment technique (TT)when it is not economically or technically feasible to set an
MCL
, Ground water sources - correct answer ✔✔wells and springs. Also can be Salty or brackish
water, rain water harvest, and treated wastewater.
surface water sources - correct answer ✔✔rivers, lakes, reservoirs
Average Daily Flowrate (or, average daily demand) - correct answer ✔✔Average daily Q to be
supplied by the WTP to serve number of current customers
Design Flowrate or Capacity - correct answer ✔✔The daily Q to be supplied by the WTP over its
design period or design life
Design Period - correct answer ✔✔A number of years for which the WTP is to be adequately
providing service.
Source water characteristics can be categorized as: - correct answer ✔✔Physical, chemical-
inorganic chemicals, chemical-organic chemicals.
Physical water characteristics - correct answer ✔✔Turbidity, Color, Odor, Taste and Temperature
Chemical - inorganic chemicals water characteristics - correct answer ✔✔Major inorganic
chemicals:
Ca2+, Mg2+, Fe2+, Mn2+, CO32-, HCO3-, SO42-etc.
Toxic inorganic chemicals:
Nitrates, cyanides and heavy metals
Chemical -Organic Chemicals - correct answer ✔✔Naturally occurring organic chemicals in
water:
Design of a Water Treatment Plant (WTP) starts with the knowledge of: - correct answer
✔✔Related regulations
Sources for potable water
Water quantity/demand analysis
Source water characterization
Treatment processes
Safe Drinking Water Act - correct answer ✔✔Mandatory federal law for protecting public
potable water supplies from harmful contaminantsDoes not protect private well or spring
waterPrimary Standards to protect tap water by setting maximum contaminant levels (MCLs) for
naturally occurring and man-made chemicals/contaminantsSecondary Drinking Water
Regulations: Nonenforceable guidelines regulating contaminants that may cause cosmetic
effects (such as skin or tooth discoloration) or aesthetic effects (such as taste, odor, or color) in
drinking water
EPA primary standards SDWA - correct answer ✔✔Identify contaminants that occur in drinking
water and may affect public health
•Determine a Maximum Concentration Level Goal (MCLG)oNo known or expected health risk
oNot enforceable
•Specify a Maximum Concentration Level (MCL)oIntended to protect public health
oHas to have a feasible best available treatment technology
oEnforceable
•Or, set a treatment technique (TT)when it is not economically or technically feasible to set an
MCL
, Ground water sources - correct answer ✔✔wells and springs. Also can be Salty or brackish
water, rain water harvest, and treated wastewater.
surface water sources - correct answer ✔✔rivers, lakes, reservoirs
Average Daily Flowrate (or, average daily demand) - correct answer ✔✔Average daily Q to be
supplied by the WTP to serve number of current customers
Design Flowrate or Capacity - correct answer ✔✔The daily Q to be supplied by the WTP over its
design period or design life
Design Period - correct answer ✔✔A number of years for which the WTP is to be adequately
providing service.
Source water characteristics can be categorized as: - correct answer ✔✔Physical, chemical-
inorganic chemicals, chemical-organic chemicals.
Physical water characteristics - correct answer ✔✔Turbidity, Color, Odor, Taste and Temperature
Chemical - inorganic chemicals water characteristics - correct answer ✔✔Major inorganic
chemicals:
Ca2+, Mg2+, Fe2+, Mn2+, CO32-, HCO3-, SO42-etc.
Toxic inorganic chemicals:
Nitrates, cyanides and heavy metals
Chemical -Organic Chemicals - correct answer ✔✔Naturally occurring organic chemicals in
water:
