Food Safety
What is the minimum time food workers must wash their hands
20 seconds
What is the effect of adding co2 to a septic tank?
Lowering PH
T or F household hazardous waste exempt from RCRA?
T
Salmonella grows best in what pH?
3.5-4.5
5.5-6.5
6.5-7.5
8.5-9.5
6.5-7.5
T or F employers are required to provide training in hazardous materials?
T
Air gap, atmospheric vacuum breaker, pressure vacuum breaker, dual check valves are examples of
backflow prevention devices
What are the three primary water pollutants? Bonus points for listing the 4th, and for listing and example of each.
Physical, Chemical, and Biological (Radiological)
nitrogen, bleach, salts, pesticides, metals, toxins produced by bacteria, and human or animal drugs.
biological or microbial contaminants include bacteria, viruses, protozoa, and parasites.
sediment or organic material suspended in the water of lakes, rivers and streams from soil erosion.
cesium, plutonium and uranium.
What are the three main types of radiation
Gamma, Beta, and Alpha
What could travel furthest in a septic field?
Viruses
Protozoa
Bacteria
Helminths (parasites)
Fungi
Viruses
Not acting when you should. Ex: not closing a restaurant when an imminent health hazard is observed
nonfeasance
Which bacteria does HACCP Primarily target?
Listeria monocytogenes
What determines sewage strength?
BOD (biochemical oxygen demand)
When dealing with hazardous waste characteristics what does CRIT stand for? (bonus points if you can explain each one)
Corrosive, Reactivity, Ignitability, and Toxicity
Toxic wastes are harmful or fatal when ingested or absorbed
Corrosive wastes are acids or bases and are capable of corroding metal containers ex: battery acid
Reactive wastes are unstable under normal conditions. They can cause explosions, undergo violent reactions, generate toxic fumes, gas , or vapors when heated compressed or mixed with water. Example: lithiumsulfur batteries
gnitable wastes can create fires under certain conditions, are spontaneously combustible, or have a flash point less than 60 degrees celcius. Ex: waste oils
Which Virus is spread through wastewater?
A. Typhoid Fever
B. Hep A
C. Cholera
D. Giardiasis
Hep A
What are the 6 primary air pollutants?
Carbon monoxide, lead, nitrogen dioxide, ozone, particle pollution, sulfur dioxide
What is an example of a critical control point?
Cook chicken to 165 degrees F, monitored by taking temperature
What are the four most common chemicals for disinfection of water?
Chlorine, ammonia, chlorine dioxide, ozone
What are MCLS?
Max contaminant levels. Enforceable and must be set as close to MCLgS as feasibly possible
What is legionnaires disease (virus, protozoa, bacteria, helminths) and what does it cause.
Atypical pneumonia caused by legionella bacteria
Why do you have leachate and methane wells in a landfill?
Provide samples representative of the average composition of the leachate and measurements of leachate head. Gas control/extractions
What are the two parts of HACCP
Hazard, Analysis and Critical Control Point
Nitrogen is transformed into what during conventional biological processes?
Ammonia and biological sludge
What is the most practical method of removing nitrates from water?
A. Ion exchange,
B. Carbon Filtration,
C. Sand filter,
D. UV
A
Which group of bacteria contains most of the pathogenic bacteria?
Mesophiles
Which agency would you refer to for writing water policy? EPA, AWWA, NGWA, UsGS
Ngwa (national ground water association)