EHST 2110 Exam 2 ECU UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
No. Education, surveillance, inspection, and consultation are necessary. - CORRECT
ANSWER Is technology the answer to environmental health?
Algae Bloom - CORRECT ANSWER Takes up oxygen in the water. Caused by
Eutrophication, that puts nitrates and phosphates from agriculture runoff (manure/fertilizer).
Cholera - CORRECT ANSWER Impure drinking water through microbial waterborne
disease. Epidemics took heavy tolls of human population, worldwide prior to 19th century.
Source discovered by Dr. Jon Snow, took off water handle.
Giardia & Cryptosporidium - CORRECT ANSWER Resistant to chlorine and need
filtration in addition to disinfection. (mainly crypto)
Safe Drinking Water Act - CORRECT ANSWER Establish max contaminate level, for
more than 80 biological chemicals, tests drinking water. Public water supply.
Leachate - CORRECT ANSWER Garbage seepage going into the ground.
2 Categories of Water Pollution - CORRECT ANSWER - Point Source Pollution: You
can see where the contaminants are coming from
- Non-point Source Pollution: Unable to source where the contaminants origin are.
Trihalomethanes - CORRECT ANSWER When chlorine added to naturally occurring
organic matter in lakes or rivers. Demonstrates carcinogenic activity in living beings.
Lead in Drinking Water - CORRECT ANSWER Lead is a toxic metal found in
products and around homes. Low levels of lead may even lead to health issues. It's associated
with old plumbing systems. Young children are at most risk.
, Nitrates in Water - CORRECT ANSWER Feed lot runoff, seepage from septic tanks
from animal feces/fertilizer. Blue baby disease, has nitrates in formula water, removing
oxygen from the baby's body.
Broad Street Well (Cholera) - CORRECT ANSWER St. James Parish, Fecal waste
dumped into cesspool located near well of London. Dr. John Snow found cholera in the
sewage, water pump. He drew a map and found that a majority of people dying were drinking
from the broad street well. He removed the well's handle and people stopped dying. He
pioneered "epidemiology" the study and control of diseases.
Biosolid Landfarming/Management (sludge) - CORRECT ANSWER How they make
fertilizer using gravity tanks. Nitrates and phosphates sludge fertilizer in the bottom of the
sedimentation tank.
Three levels of sewage treatment - CORRECT ANSWER Primary treatment, secondary
treatment & tertiary treatment
Primary Treatment - CORRECT ANSWER Mechanical process, screens and
sedimentation tank
Secondary Treatment - CORRECT ANSWER Biological process. Adds air to grow
microbes/bacteria to consume most of the remaining waste materials. Required by law to at
LEAST have secondary treatment.
Tertiary Treatment - CORRECT ANSWER Advanced treatment; chemical, physical
and biological. Treated wastewater for drinking, irrigation or recreation. Remove nitrates and
phosphates.
Aim of Sewage Treatment - CORRECT ANSWER Improve the quality of wastewater
discharged into waterway without harming aquatic or threatening the public health.
General categories of Water Pollution - CORRECT ANSWER Point source & Non-
point source
QUESTIONS AND CORRECT ANSWERS
No. Education, surveillance, inspection, and consultation are necessary. - CORRECT
ANSWER Is technology the answer to environmental health?
Algae Bloom - CORRECT ANSWER Takes up oxygen in the water. Caused by
Eutrophication, that puts nitrates and phosphates from agriculture runoff (manure/fertilizer).
Cholera - CORRECT ANSWER Impure drinking water through microbial waterborne
disease. Epidemics took heavy tolls of human population, worldwide prior to 19th century.
Source discovered by Dr. Jon Snow, took off water handle.
Giardia & Cryptosporidium - CORRECT ANSWER Resistant to chlorine and need
filtration in addition to disinfection. (mainly crypto)
Safe Drinking Water Act - CORRECT ANSWER Establish max contaminate level, for
more than 80 biological chemicals, tests drinking water. Public water supply.
Leachate - CORRECT ANSWER Garbage seepage going into the ground.
2 Categories of Water Pollution - CORRECT ANSWER - Point Source Pollution: You
can see where the contaminants are coming from
- Non-point Source Pollution: Unable to source where the contaminants origin are.
Trihalomethanes - CORRECT ANSWER When chlorine added to naturally occurring
organic matter in lakes or rivers. Demonstrates carcinogenic activity in living beings.
Lead in Drinking Water - CORRECT ANSWER Lead is a toxic metal found in
products and around homes. Low levels of lead may even lead to health issues. It's associated
with old plumbing systems. Young children are at most risk.
, Nitrates in Water - CORRECT ANSWER Feed lot runoff, seepage from septic tanks
from animal feces/fertilizer. Blue baby disease, has nitrates in formula water, removing
oxygen from the baby's body.
Broad Street Well (Cholera) - CORRECT ANSWER St. James Parish, Fecal waste
dumped into cesspool located near well of London. Dr. John Snow found cholera in the
sewage, water pump. He drew a map and found that a majority of people dying were drinking
from the broad street well. He removed the well's handle and people stopped dying. He
pioneered "epidemiology" the study and control of diseases.
Biosolid Landfarming/Management (sludge) - CORRECT ANSWER How they make
fertilizer using gravity tanks. Nitrates and phosphates sludge fertilizer in the bottom of the
sedimentation tank.
Three levels of sewage treatment - CORRECT ANSWER Primary treatment, secondary
treatment & tertiary treatment
Primary Treatment - CORRECT ANSWER Mechanical process, screens and
sedimentation tank
Secondary Treatment - CORRECT ANSWER Biological process. Adds air to grow
microbes/bacteria to consume most of the remaining waste materials. Required by law to at
LEAST have secondary treatment.
Tertiary Treatment - CORRECT ANSWER Advanced treatment; chemical, physical
and biological. Treated wastewater for drinking, irrigation or recreation. Remove nitrates and
phosphates.
Aim of Sewage Treatment - CORRECT ANSWER Improve the quality of wastewater
discharged into waterway without harming aquatic or threatening the public health.
General categories of Water Pollution - CORRECT ANSWER Point source & Non-
point source
