HAZ EXAM 2 Flashcards
The California site mitigation decision tree process has _____ basic components.
5
- Preliminary Site Apprasail
- Site Assesment
- Risk Appraisal
- Environmental Fate and Risk Determination
- Determination of a Mitigation Strategy and Selection of a Remedial Action Plan
According to the California Site Mitigation Decision Tree, concentrations of toxic substances that, if exceeded, place a specific biological receptor at significant risk are called:
AALs
Applied Action Level
The ground water at a site is contaminated. According to CERLA, subsurface water testing is limited to:
As far as the underground water table reaches
During a site investigation, the oxygen concentration meter indicates an oxygen level of 28.5%. You should :
Stop the invest and immediately call the fire department .
( continues invest if concentration is 19.5% to 25% )
According to the EPA, what is the least desirable method of dealing with hazardous on-site waste?
Landfill
A site that was previously used as a mortuary is suspected of contamination. Which of the following toxic materials is most likely to be identified ?
A. Cyanide waste
B. Formaldehyde
C. Acetic acid
D. Ignitable waste
B. Formaldehyde
Which component of chemicals commonly used in a printing shop is considered toxic?
Heavy metals in ink
Liquid waste from a metals plating plant would not be expected to contain:
Formaldehyde
Employees may work in trenches 5 ft or deeper without shoring if the walls of the trench are sloped at least ____ horizontal to _____ vertical.
3/4 horizontal to 1 vertical
When gathering evidence for a possible legal action, EPA recommends collecting _____ identical waste samples.
3
What type of sample container should you use for sampling oil wastes?
LPE bottles
( Linear Polyethylene)
When sampling hazardous waste, samples of materials that are known to deteriorate chemically or biologically should be refrigerated at:
4˚C (39.2˚F)
Range cited in literature is 4˚C to 6˚C
Which equipment is NOT recommended for excavation except for a large site ?
Dragline Excavator
Soil containing high levels of volatiles needs to be excavated. Which equipment is NOT recommended ?
Dragline excavator
According to the EPA, what is the most economical method over cubic yard to remove gas-permeated earth ?
Loader with a 5 yd bucket
The base of a manhole used for a subsurface drainage system should extend atleast ____ below the lowest pipe to provide a trap for sediment.
18 inches
Who is the only entity that has the authority to shut down a job because of a safety violation ?
OSHA
Personnel who wear respirators for _____ or more days must receive a medical surveillance .
30
If you are sampling upwind for a contaminated area, you are probably doing it to:
Establish background levels of air contaminants
Which if the following is NOT a factor to consider when planning to avoid heat exhaustion ?
A. Slope
B. Temperature
C. Terrain
D. Humidity
A. Slope
Synthetic liners must be at least _____ thick.
20 mils
Which of the following is a rubber-tire loader best used for ?
A. Excavating
B. Spreading
C. Compacting
D. Hauling
A. Excavating
If an employee suffers from heat stress, he or she should be sent home to rest for how long?
24 hours
When practical, tank vessels and other confined spaces should be entered:
From the side when practical
Acetyl chloride, bleach, and oxidizer wastes are identified as:
Reactive
The EPA’s Applied Action Levels for carcinogens are based on a maximum exposure level that produces an adverse effect on _____ people exposed in a population.
1 in 1 million
Benzene, paint and certain degreaser wastes are identified as:
Ignitables
Wastes that dissolve metals and other materials or that “burn” the skin are identified as:
Corrosives
Split samples are obtained to:
Determine the accuracy of samples
Electro-osmosis with an underground leaching system is associated with:
A lagoon
Ground-water investigation programs often use a _____ to determine elevations of water levels.
Piezometer with a small diameter tube and short screen
If you are inspecting a site that was formerly used for furniture manufacturing , which of the following types of hazardous waste would you expect to encounter?
Organic Solvents
According to the California Site Mitigation Decision Tree Manual, which document is prepared to verify performance standards, samplings protocols and reliability of measurements ?
QA/QC Plan
The normal background exposure-rate for gamma radiation is approximately _______ milliroentgen per hour
(mR/hr)
0.01 to 0.02
If the rate of gamma-radiation exposure at a sure is three to five times the normal background level:
Work may continue but a health physicist should be consulted and a site surgery conducted.
What is the fine per day for shipping hazardous materials to a non-permitted treatment facility ?
$50,000
Which plan was established to implement procedures for coordinating responses of hazardous substances into the environment ?
National Contingency Plan
Which federal law established a “superfund” for financing the cleanup of uncontrolled hazardous waste sites ?
CERCLA
Which agency is ultimately in charge of hazardous substance removal programs ?
EPA
A bowl, basket, and disc nozzle are all equipment that may be used for a ______ type of dewatering system.
Centrifuge
Pressure demand respirator is what type of hazardous respirator ?
SAR type “C”
Pressure demand respirator is what type of hazardous respirator ?
SAR type “C”
Excavating, spreading, compacting and hauling are to be done at a hazardous site. A crawler is best for:
Excavating
According to the EPA, the main reason synthetic liners should not be installed during hot and humid weather is:
Poor seam adhesion
NIOSH recommends a progressive _____ acclimatization period for a worker unused to the heat before allowing the worker to perform full work.
6 day
What type of protection is required for infectious waste ?
Disposable clothing plus PPE
A cyanide-bearing waste exposed to pH conditions of 5.0 would be classified as a _____ waste
Reactive waste
Why would you “spike” a sample ?
To calibrate the equipment
The last link in the EPA’s “cradle to grave” hazardous-waste management system is the:T
TSD facility
According to Title 22, a landfill owner or operator must keep hazardous waster inspection records at least:
3 years
When a land disposal facility is closed, it must be monitored for _____ to ensure the integrity of waste-containment systems.
30 years
According to Cal/OSHA, an employee entering and working in an underground tank or other confined space must be provided with a safety belt that:
Has attached 2,000 lb-test line al teast 1/2” diameter with the free secured outside the entry opening
Less than 5 microgram/Kg of TPH is found in earth contaminated by gasoline. Which type of protective device is required ?
Full-face shield with OV cartridge
The process used to cover buried waste materials to prevent their contact with the land surface and groundwater is called:
Capping
The initial step of a remediation process is called:
Scoping
The mass-transfer process in which volatile contaminants in water or soil are removed and transferred to a gas is called:
Air stripping
The minimum number of samples required when removing an underground storage tank is:
2
The best way to clear an underground storage tank of gases and toxic vapors before the tank is removed is to infuse it with ____ gas.
CO2
IRM stand for :
Initial Remedial Measure
