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Strategies for Characterizing Subsurface Releases of Gasoline Containing MTBE II


Quiz Questions

1.What does MTBE stand for?
Methyl tertiary-butyl ether
Methane tertiary-butyl ether
Methyl Tetra Butyl Ether
None of the above
2. Two types of oxygenates are commonly added to gasoline. They are ______________________:
Ethers and alcohols
Methane and Butyl
3.MTBE is currently the most commonly used ether oxygenate due to its high-octane properties and availability.
True
False
4.Oxygenates were subsequently used at higher concentrations to reduce vehicle emissions and improve air quality.
True
False
5.______________ and other oxygenates generally have high vapor pressures, and they tend to volatilize readily from NAPL.
MTBE
Methane
6.Oxygenates have high tendency to volatilize from groundwater, and so the soil vapor in the vicinity of a dissolved-phase plume may only contain low, or even non-detectable, oxygenate concentrations.
True
False
7.What does TPH stand for?
Total petroleum hydrocarbons
Simple crystal frequency synthesizer
Total petroleum hydrogen
Tetra Poly-Hydrocarbons
None of the above
8.Risk-based decision-making is a management strategy that adds exposure and risk considerations to the traditional components of the corrective action process.

True
False
9.A ________________ is an inventory of the actual and potential sources, pathways, and receptors related to the chemical release.
Conceptual site model (CSM)
Analytical method
10.The conceptual model is used in several ways. They are as follows:
To communicate site conditions to decision makers and stakeholders
To define potential exposure pathways for further investigation and evaluation
To derive pathway-specific, risk-based remedial goals
To select pathway-specific remedies to meet remedial goals
All of the above
11.The most common receptors affected by subsurface releases of oxygenates are the current and future users of potable or non-potable water from municipal or private water wells.
True
False
12.The objective of receptor characterization is to identify any receptors that could be affected by an oxygenate release.
True
False
13.The purpose of __________________is to estimate the extent (and to a lesser degree, the magnitude) of a subsurface release of oxygenated fuel.
Plume delineation
Geological characterization
14.The purpose of flow system (hydraulic) characterization tasks is to understand the local and regional groundwater flow system and its impact on the migration of a dissolved plume.
True
False
15.Dissolved-phase oxygenate plumes may display same geometries as dissolved-phase BTEX plumes.
True
False
16.What does ESA stand for?
Expedited Site Assessments
Empirical Site Assessments
Expedited Site Association
None of the above
17.The objectives of groundwater monitoring may include evaluating seasonal changes in site conditions, documenting evidence of source depletion, evaluating plume stability or migration, or assessing the effectiveness of corrective actions.
True
False
18.Direct push (DP) tools are used for subsurface investigations by driving, pushing, and/or vibrating small-diameter hollow steel rods into the ground.
True
False
19.There are two primary types of soil sampling tools. They are___________________.
Non-sealed samplers and piston sampler
Collecting and Load sampler
20.Multi-level groundwater monitoring can be accomplished by simply installing clusters of single interval monitoring wells at different depths.
True
False