Mixed Deck — All CPG Topics Flashcards

What factor MOST affects the validity of environmental monitoring & assessment outcomes in Certified Professional Geologist?

Answer: The consistency and appropriateness of assessment methods used

Validity depends primarily on using consistent, appropriate methods that actually measure what they are intended to measure.

What is a retaining wall used for in geotechnical engineering?

Answer: Stabilize slopes and prevent erosion

A retaining wall is a structure used in geotechnical engineering to hold back soil or rock from a slope that would otherwise collapse or erode. Its primary purpose is to stabilize slopes, prevent soil erosion, and create usable land on uneven terrain. By counteracting lateral earth pressure, retaining walls ensure the stability of elevated ground surfaces for construction or landscaping.

Under current EPA ProUCL guidance, which method is preferred for handling nondetects when computing summary statistics?

Answer: Kaplan-Meier estimation

ProUCL recommends Kaplan-Meier or similar methods over arbitrary substitution, which can bias the mean and variance.

Which practice best prevents cross-contamination when sampling multiple monitoring wells with one non-dedicated pump?

Answer: Sampling from the least to the most contaminated well and decontaminating between wells

Going from clean to dirty wells and fully decontaminating between them lowers the risk of carrying contamination over.

The CPG (Certified Professional Geologist) credential is issued by which organization?

Answer: The American Institute of Professional Geologists (AIPG)

AIPG administers the CPG certification program, which has been the national standard for professional geologist certification since 1963.

Why are field SPT blow counts commonly corrected to N60?

Answer: To normalize for hammer energy delivered relative to 60% of theoretical free-fall energy

Hammer systems deliver different energy ratios, so N is normalized to a 60% energy efficiency standard.

What is the FOUNDATION of effective quality assurance & control in Certified Professional Geologist?

Answer: Clearly defined standards and measurable criteria

Clearly defined standards and measurable criteria provide an objective foundation for assessing and improving quality.

The Cooper-Jacob straight-line approximation of the Theis equation is generally considered valid when the well function argument u is:

Answer: Less than about 0.01

Cooper-Jacob truncates the Theis series, which is accurate only when u = r²S/4Tt is small (commonly < 0.01).

How does structural geology aid geologic mapping?

Answer: Interprets deformation structures

Structural geology focuses on the study of the three-dimensional distribution of rock units with respect to their deformational histories. By analyzing features like faults, folds, and joints, structural geology helps geologists understand the forces that have shaped the Earth's crust, which is crucial for accurately interpreting and mapping the subsurface arrangement of rock layers.

When a CPG provides expert witness testimony, their opinions must be:

Answer: Based on scientific evidence and their honest professional judgment, regardless of which party hired them

Expert witnesses have a duty to the court and to the truth; a CPG must provide honest, scientifically grounded testimony even if it does not fully support the hiring party's case.

In Certified Professional Geologist, what is the PRIMARY purpose of conducting regular laboratory techniques & safety assessments?

Answer: To identify potential hazards before incidents occur

Regular safety assessments are primarily conducted to proactively identify and mitigate potential hazards before they lead to incidents or injuries.

A CPG maintains professional liability (errors and omissions) insurance primarily to:

Answer: Protect clients and themselves against financial losses resulting from professional mistakes or oversights

Errors and omissions insurance covers claims arising from mistakes, oversights, or alleged negligence in professional geological services, protecting both the client and the CPG.

A 'klippe' in structural geology is defined as:

Answer: An erosional remnant of a thrust sheet isolated atop younger rocks

A klippe is an outlier of a nappe or thrust sheet that has been isolated by erosion, leaving older rocks surrounded by younger rocks.

Which factor determines the appropriate instrumentation & calibration replacement schedule in Certified Professional Geologist?

Answer: Performance data, safety records, and total cost of ownership analysis

Replacement decisions should be based on performance data, safety records, and total cost analysis rather than arbitrary timelines.

When should data analysis & statistical methods be conducted in Certified Professional Geologist?

Answer: At regular intervals and whenever significant changes occur

Regular assessments combined with trigger-based reviews ensure ongoing monitoring while capturing the impact of significant changes.

A dark prismatic mineral in a hand sample shows two cleavages that meet at about 56° and 124°. Which mineral is it most likely?

Answer: Hornblende

Amphiboles such as hornblende have two cleavages at about 56° and 124°, while pyroxenes have cleavages at roughly 87° and 93°.

In legal and professional contexts, 'professional negligence' for a CPG is best described as:

Answer: Failure to exercise the standard of care expected of a reasonably competent geologist

Professional negligence occurs when a CPG fails to meet the standard of care that a competent geologist with similar training would have applied under the same circumstances.

Which of the following minerals is hard enough to scratch quartz?

Answer: Topaz

Topaz has a Mohs hardness of 8, so it can scratch quartz, which has a hardness of 7.

Oriented core is collected mainly to provide what information?

Answer: The true strike and dip of fractures, bedding, and other planar features

Orienting core against a reference line lets structural features be measured in their true in-situ orientation.

What is a key concern when collecting groundwater samples with a bailer for VOC analysis?

Answer: Aeration and agitation during bailing can cause volatile loss

Bailer insertion and pouring agitate and aerate the water, which can bias VOC concentrations low.