HAZ EXAM 3 Flashcards
Your workers have encountered bulging drums that must be moved. The individual drums are overpacked before moving and are handled with a grappler constructed for explosive containment. According to the Occupational Safety Guidance Manual, this procedure is:
Correct: Overpacked drums may be safely moved now.
All of the following items are proper equipment for use in opening drums except:
A. Impact wrenches
B. Firearms
C. Backhoes
D. Drum piercers
B. Firearms
The proper procedure when taking samples from a drum with a bung on one end is to:
Stand drum with bung up
If the whole lid lifts off the top of a drum, it is designed to contain:
A solid
Which of the following is an operation used to reduce the moisture content of slurries or sludges to facilitate handling and to prepare materials for final treatment or disposal?
A. antimatter separation
B. filtration
C. dewatering
D. hydrocyclone
C. Dewatering
If a drum has a liner, it is most likely to contain:
A highly corrosive or otherwise hazardous material
Opening in pressurized drums are plugged with pressure venting caps at what psi?
5 psi
Fugitive dust emissions from excavation activities can be reduced by maintaining a favorable slope and orientation on the waste pile. According to EPA guidelines, in order to minimize emissions, the maximum allowable slope of the pile in the prevailing wind direction is:
10˚
Which of the following can be used to dewater slurries or sludges?
A. gravity thickening
B. dewatering lagoon
C. centrifuge
D. all of the above
D. All of the above
When a drum has a bung it is designed to hold:
A liquid
According to EPA or DOSH, when spraying water to combat fugitive dust on active travel paths, re-spray the paths approximately every _____ to maintain the effectiveness of the procedure.
2 hours
If hazardous waste is to be incinerated, what is the minimum acceptable BTU per pound?
5,000 BTU per/lb
A fence or barricade may be used to reduce wind velocity and control fugitive dust. Maximum reduction of wind velocity can be expected for a distance of _____ the height of the fence downstream.
1 to 5 times
Groundwater monitoring wells are often used in conjunction with caps to:
Detect any unexpected migration of capped wastes
Caps covering contaminated materials generally last about _____ when a synthetic liner is the only liquid barrier.
20 years
The Chain of Custody record should contain all of the following except:
A. the activity or process that generates the waste
B. the sample number of the collector
C. date and time of collection
D. place and address of collection
A. The activity or process that generates the waste
Approximately 90% of all _____ can be sampled with a Coliwasa sampler.
Liquids and sludges
Concrete covers on contaminated materials usually last about _____, unless they are placed on chemically severe or physically unstable landfill.
50 years
What does a gravel-pack filter on a remedial action well do?
A. It fills the annular space, thereby preventing the uncontrolled collapse of the formation against the screen.
B. It retains some of the fines to prevent them from being pumped constantly.
C. It transmits water freely from the aquifer to the screen during pumping.
D. all of the above
D. All of the above
The high combustibility of methane makes it a potential hazard in landfill environments. Methane is flammable at atmospheric pressure and ordinary temperature in concentrations between _____ and _____ by volume in air.
5% and 10%
The EPA recommends using sample seals to:
Preserve the integrity of the sample from the time it was collected until it is opened in the lab.
Which of the following does the EPA recommend for sampling most types of soil?
A. linear polyethylene container
B. glass jar
C. Coliwasa sampler
D. Veihmeyer sampler
D. Veihmeyer sampler
Samples of hazardous materials shipped to a laboratory must have at least _____ of tight packing around them.
4”
A sample taken for legal purposes is collected in a container that has not been properly cleaned. The integrity of the sample:
Will be questionable for legal or regulatory purposes
The most important factors to consider when choosing containers for hazardous waste samples are:
Compatibility, resistance to breakage and volume
The _____ for a substance is the 8-hr time-weighted average or ceiling concentration above which workers may not be exposed.
PEL
(Permissible Exposure Limit)
The concentration of an airborne contaminant that should not be exceeded even for an instant is called the:
TLV-C
(Threshold Limit Value — Ceiling)
The time-weighted average concentration for a normal 8-hour workday AND a 40-hour workweek, to which nearly all workers may be repeatedly exposed without adverse effect, is called the:
TLV-TWA
(Threshold Limits Value - Time - Weighted Average)
A 15-minute time-weighted average exposure that should not be exceeded at any time during a work day is called the:
TVL-STEL
(Threshold Limit Value - Short-Term Exposure Limit)
Employees must receive at least _____ of off-site instruction at the time of job assignment.
40 hour
Employees must also receive at least _____ of actual field experience under the direct supervision of a trained, experienced supervisor.
3 days
The command post is located in the :
Support Zone
On-sight management and supervisors in hazardous-waste operations must receive the same training as employees plus at least _____ additional of specialized training at the time of job assignment.
8 hours
The contamination control line is located between:
The contamination reduction zone and the support zone.
If a worker leaves the Exclusion Zone to change a canister or mask, which of the following procedures would not be required in the Exclusion Zone?
A. segregated equipment drop
B. tape removal
C. outer glove removal
D. wash and rinse suit/safety boot
D. Wash and rinse suit/safety boot
The decontamination area must be located in the _____ Zone.
Contamination Reduction Zone
A person wearing Level-C protection and leaving the Exclusion Zone is determined to be highly contaminated. Which of the following is proper procedure in this situation?
A. equipment need not be placed in segregated drops
B. gross contaminants are removed with water or a liquid rinse
C. outer boots and gloves are removed last
D. decontamination procedures are all performed at the same station
B. Gross contaminants are removed with water or a liquid rinse
For protection of personnel at the decontamination station, a system of air monitors should be established in:
The exclusion zone
The uncontaminated area where workers should not be exposed to hazardous conditions is called the _____ Zone.
Support Zone
The _____ Zone is where contamination does or could occur.
Exclusion Zone
According to OSHA, if an employee is exposed to hazardous materials, how many years must an employee’s medical records be kept after he or she leaves the company?
30 years
When should you decontaminate a victim in a medical emergency?
If the decontamination doesn’t interfere with essential treatment of the victim
Who is responsible for liaison with community officials prior to the start of a hazardous waste project?
Project Team Leader
Who is responsible for coordinating jobsite activities (emergency response) with the appropriate government officials?
Project Team Leader
Who is responsible for checking respirators ?
Site Safety Officer
The Contingency Plan is part of the:
Safety Plan
The HNU photoionizer has a detection limit of:
0.1 PPM (benzene)
The useful range of the OVA is:
0-1000 PPM
The OVA (Foxboro Organic Vapor Analyzer) has a detection limit of:
0.1 PPM ( methane )
The useful range of the HNU is:
0-2000 PPM
The standard gas used to calibrate the HNU meter is
Benzene
The standard gas used to calibrate the OVA meter is:
Methane
A photoionization detector is used to reveal the presence of:
Organic and some inorganic gases and vapors
During site monitoring, collect air samples _____ the source, along the axis of the wind direction.
Downwind from
