6. Biological Hazards / 7. Business Principles / 8. Chemical Hazards / 9. Climate Conditions / 10. Communication & Group Dynamics / 11. Confined Spaces / 12. LOTO / 13. Cranes & Rigging Flashcards
Name the four business principles
- Cost benefit analysis
- Life cycle costs
- Net present value (NPV)
- Return on investment (ROI)
Which are insurable costs?
Direct costs are insurable.
Indirect costs aren’t.
Which is the relation between direct and indirect costs?
IC can be 1.1 to 4 times the DC
Net Benefits formula
(cost-benefit analysis)
Net Benefit = Benefit - Costs
Life cycle cost - stages
- Design concept
- Detailed design
- Purchase or install
- Operation and maintenance
- Decommission
Time Value of Money (formula)
F = P (1 + i )^n
P: present value of money (principle and investment interest)
F: future value of money (cost avoidance)
i: annual interest rate (APR)
n: period of time in years
Discount rate
A rate used to discount a future cash flow to its present value. Sometimes referred to as cost of capital.
In the USA, ____ publishes quarterly circular with prescribed discount rates for Federal Government use.
OMB: Office of Management and Budget.
Return on Investment (ROI) - formula
ROI = Net return / Cost of investment
ROI = (Gain of investment - Cost of investment) / Cost of investment
Cost of Loss (Illness)
Revenue Required = (Total Cost) / (% Profit Margin / 100)
Harmful biological agents (6)
Bacteria
Viruses
Parasites
Fungi
Allergens and toxins
Bites or stings
Bacterias and shapes
They are simple, one-celled organisms.
- Bacillus or rod-shaped
- Coccus or spherical
- Spirillum or twisted
Lyme disease
- Source
- Transmission
- Activities at risk
- Borrelia burgdorferi, transmited through a bacteria in the ticks.
- It is needed that the tick was attached to he human body among 26 to 48 hours.
- Outdoor activities.
Legionnarie’s desease and Pontiac fever
- Source
- Transmission
- Activities at risk
- Legionnela can grow in water if it is not properly maintained.
- Health problem when small droplets are inhaled.
- hospitals, hotels, cruiseships
Tuberculosis
- Source
- Transmission
- Activities at risk
- Mycobacterium tuberculosis,
- Transmitted by air
- Risk in hospitals, homeless shelters, correctional facilities, nursing homes
Brucelosis
- Source
- Transmission
- Activities at risk
- Brucella,
- Passed among animals: sheep, goats, cattle, deer, elk, pigs and dogs. Humans get infected by contact with these animals or animal products.
- Meet packing, livestock producers, veterinary, laboratory employees
Leptospirosis
- Source
- Transmission
- Activities at risk
- Genus leptospira
- Transmitted by urine of infected animals which can get into water or soil, common in temperate or tropical climates
- Outdoor workers or anyone who works with animals. Increased cases after hurricanes and floods, where people have to wade through contaminated water.
Tularemia, rabbit fever or deer fly fever
- Source
- Transmission
- Activities at risk
- Francisella tularensis bacterium
- Tick and deer fly bites, skin contact with infected animals, drinking contaminated water, inhaling contaminated aerosols, agricultural and landscaping dust, lab exposure
Considered a possible bio terrorism threat
Tularemia, rabbit fever or deer fly fever
Rocky mountain spotted fever
- Tick bite.
- Outdoor personnel, military personnel, rangers, foresters, ranchers, farmers, trappers, construction workers, lumber workers
Q Fever
- Source
- Transmission
- Activities at risk
- Coxiella Burnetti, natural in goats, sheep and cattle.
- Breathing dust contaminated with feces, urine or milk, or after helping animals give birth.
- Veterinarians, dairy farmers, ranchers, stock yard workers, meat processing personnel
Viruses
Tiny particle, smallest of all microbes. It reproduces infecting a host cell.
Hepatitis A, B & C
- Disease
- Transmission
- All produce liver infection and desease
- Hepatitis A: acute desease. Person to person through the fecal-oral routes or consumption of contaminated food or water.
- Hepatitis B: through blood, semen or other bodily fluids enter into a uninfected person
- Hepatitis C: transmitted through blood or bodily fluids with blood in them
What virus is covered in bloodborne pathogen standard?
Hepatitis B
Rabies
- Source
- Transmission
- Activities at risk
- Disease of mammals, transmitted by the bite of a rabid animal.
- Brain desease and death.
- Racoons, skunks, bats and foxes
CDC
Center for Desease Control
Hantaviruses
- Source
- Transmission
- dry droppings, urine or saliva of mice and rats
Avian influenza, avian or bird flu
Influenza type A normally found only in birds.
Parasite
Organism who lives in another organism called the host and often harms it.
Malaria
- Source
- Transmission
Mosquito-borne disease.
Common in tropical and subtropical countries,
Babesiosis
- Source
- Transmission
Microscopic parasites that infect red blood cells and are spread by certain ticks.
Toxoplasmosis
- Source
- Transmission
infection with the Toxoplasma gondii parasite, through eat or handling undercooked or contaminated meat.
Considered the lead cause of death attibuted to foodborne illnesses in the USA
Toxoplasmosis
One of the world’s most common parasites
Toxoplasma gondii parasite
Scabies
- Source
- Transmission
Infestation of the skin by the human itch mite. The scabies mite burrows into the upper layer of the skin where lives and lays eggs.
Fungi, types, production
Naturally occurring organisms and are essential in making organic matter decay
Mildew, molds, rusts and yeasts
Produces spores that are transported through the air
Histoplasmosis
Fungus histoplasma capsulatum, which grow in soil particularly contaminated with bat or bird droppings
Affects the lungs
Aspergillosis
Aspirgillus (common mold), found in soil, plants and in decaying plant matter, also in household dust, building material and even in spices and some food items.
Particularly in persons with lung desease.
Candidiasis or thrush
Fungal infection of the Candida species.
Skin or mucus membrane infection, also can enter into de bloodstream.
Coccidioidomycosis or valley fever
Fungal desease caused by Coccidioides, found in soil of semi-arid areas.
People with exposure to dust are at more risk.
How is transmitted Zika virus, West Nile virus, dengue and malaria?
Through mosquito bites.
What are poison Ivy, Oak and Sumac?
Plant allergens and their related toxins
Hypersensitivity pneumonitis
It is an inflammation of the lungs due to breathing inorganic dusts, fungi or molds
OPIM
Other Potentially Infectious Materials
Farmer’s Lung
It is a hypersensitivity pneumonitis due to breath in dust from moldy hay.
Farmer’s Lung
It is a hypersensitivity pneumonitis due to breath in dust from moldy hay.
Examples of bloodborne pathogens in workplace
Hepatitis B, Hepatitis C, Human Immunodeciency Virus (HIV)
What scope has the exposure control plan (OSHA’s Bloodborne Pathogens Standard (29 CFR 1910.1030)
- Engineer, work practice controls.
- PPE.
- Training.
- Medical surveillance.
- Vaccinations.
Tenet: “Universal Precautions”
Treatment of all human blood and OPIM as if they where infected with bloodborne pathogens.
Which vaccine must be available to workers exposed to bloodborne pathogens? (OSHA)
Hepatits B
Basic elements of a Biological Safety Program in a laboratory
- SOP: standard operating procedures
- Safety equipment
- Facility design
Biological safety cabinets: classes (3)
Class 1: partially containment cabinet
Class 2: laminar flow cabinet
Class 3: gas-tight negative pressure cabinets (highest degree of worker protection)
HEPA filter
HEPA is a type of pleated mechanical air filter. It is an acronym for “high efficiency particulate air [filter]” (as officially defined by the U.S. Dept. of Energy). This type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm).
Biosafety levels
Levels to isolate dangerous biological agents in a closed facility.
BSL-1 (lowest)
BSL-2
BSL-3
BSL-4 (highest)
Able or likely to shatter violently or burst apart.
Explosive
____ can be explosive, corrosive, and toxic and present extreme fire hazards.
Organic peroxides
What size of particles reach the alveolar sacs?
About 5 microns.
What is the dose response relationship?
Higher the dose, the more severe the response.
What is LD-50? What is LC-50?
It is lethal dosis, amount of material which causes the death of 50% of a group of tested animals. The route of ingress could be injection, absorption or by swallowing.
It is lethal concentration, it is the same of above but the route of ingress is inhalation.
Which are the organs most commonly affected by chemicals?
Liver, kidneys, nervous system (including heart), blood and reproductive system.
Types of chemicals that affect the human body
- Carcinogen
- Reproductive toxin
- Mutagen
- Teratogen: cause malformations or birth deffects when contact the mother
- Irritant
- Corrosive
- Sensitizer: causes allergic reaction on normal tissue after repeated exposure
- Asphyxiant: CO,
- Central nervous system depressant: causes simple anaesthetic effects. E.G. solvents
What is the Thalidomine?
It is an example of teratogen.
Classification of chemical by their effect to body systems and examples
- Hepatoxins: liver - Arsenic
- Nephrotoxins: kidneys - lead, halogenated hydrocarbons
- Neurotoxins: nervous system - carbon disulfide, hexane, lead, mercury
- Hemo/Hematoxins: decrease hemoglobin function and deprive body tissues of oxygen - Arsenic, benzene
Difference between irritant and allergic contact dermatitis
- ACD: because of a irritant, affect to many workers
- ICD: because of a sensitizer, affect to few workers
Nanoparticles: measure and origin
1 - 100 nanometers (1 billionth of a meter)
2.- Engineering origin
Regulatory limits for chemical in US
PEL : Permissible Exposure Limits enacted by Occupational Safety and Health Administration (OSHA)
What are OEL? Where are they from? MAK? WUS?
Occupational Exposure Limits
MAK: Germany
WUS: UK
TLV are ____ enacted by _____ (recommended)
REL are ___ enacted by _____ (recommended)
BEI are ____ enacted by _____
Threshold Limit Values, ACGIH (American Conference of Governmental Industrial Hygienists)
Recommended Exposure Limits; NIOSH (National Institute of Occupational Safety and Health)
Biological Exposure Limits, ACGIH (American Conference of Governmental Industrial Hygienists)
Which organization recommends standards to OSHA?
NIOSH
TWA? STEL? C?
Time Weighted Average
Short Term Exposure Limit
Ceiling Value
What is an action level?
50% of whatever standard (TWA, STEL, PEL,…).
IDLH
Immediately Dangerous to Life and Health
A condition that poses a threat of exposure to airborne contaminants hen that exposure s likely to cause death or immediate or delayed permanent adverse health effects or prevent a escape from such an environment.
Where can find IDLH for many chemicals?
In the NIOSH pocket guide for chemical hazards
Types of airborne sampling (by duration)
Grab sampling
Integrated sampling
Sampling that involves placing a collection device and media at a stationary location inside a room or area. This type of sampling is used to evaluate background concentrations, locate sources of exposure, or evaluate the effectiveness of control measures.
Area sampling
Sampling that directly evaluates worker exposure through worn sampling devices, which draw air across a filter media for sample collection, and the device is sent to a laboratory.
Personal sampling
____ sampling pump: Used primarily to sample for gases and vapors.
____ sampling pump: particulates, fumes ands mists.
Low-volume sampling pump or personal sampling pumps
High-volume sampling pump
Passive sampling
Uses a badge or monitor hung by the employee, it is like a personal sampling without the use of pumps
Removal of contaminants generated in an area by mixing enough outdoor air with the contaminant to reduce concentrations of air contaminants to a safe level.
Dilution ventilation
Which atmosphere is considered oxygen deficient?
Below 19.5% O2
Which respirators allows OSHA in the workplace?
Respirators approved by NIOSH.
What is an APF?
Assigned Protection Factor established by NIOSH.
Can range from 10 to 10,000.
E.G. An APF of 10 means that the respirator can protect against exposure levels that are up to 10 times the exposure limit for the hazard.
Respirator classes
air purifying respirators (APR)
- filtering face piece respirators (remove particles)
- quarter, half or full face mask respirators
- powered air purifying respirators (PAPR) (battery powered devices)
atmosphere-supplying respirators
- Supplied air respirators (SAR)
- Self-Contained Breathing Apparatus (SCBA)
combination of both