CEA Environmental Assessment & Sampling Techniques 2

Question 1

When conducting a Phase II Environmental Site Assessment, which QA/QC measure ensures laboratory results are representative of field conditions?

Accepted Answer

Using field duplicates and trip blanks

Answer

Field duplicates verify sampling reproducibility while trip blanks detect cross-contamination during transport, both are essential QA/QC measures in Phase II ESAs.

Question 2

Which soil sampling method is most appropriate for collecting a representative composite sample across a large, uniformly contaminated area?

Accepted Answer

Systematic grid sampling with equal-spaced intervals

Answer

Systematic grid sampling provides equal spatial coverage across a site, making it the most appropriate method for characterizing uniform contamination in large areas.

Question 3

A NAPL (Non-Aqueous Phase Liquid) is identified in a monitoring well. What does the presence of LNAPL indicate?

Accepted Answer

Product is floating on the water table surface

Answer

LNAPL (Light Non-Aqueous Phase Liquid) is less dense than water and floats at or near the water table surface, indicating a surface or shallow subsurface release.

Question 4

During air sampling for volatile organic compounds (VOCs) using Summa canisters, what is the critical parameter to verify before field deployment?

Accepted Answer

Pre-evacuated canister vacuum pressure

Answer

Pre-evacuated Summa canisters must have the correct vacuum pressure verified before deployment to ensure they can draw the required air sample volume.

Question 5

Under ASTM E1527-21, which of the following is classified as a 'Recognized Environmental Condition' (REC)?

Accepted Answer

A historical dry cleaner operation on the subject property

Answer

A historical dry cleaner operation is a classic REC because dry cleaners commonly used chlorinated solvents (PCE/TCE) that create significant contamination risk.

(CEA) Certified Environmental Auditor Practice Test

(CEA) Certified Environmental Auditor Practice Test

CEA Environmental Assessment & Sampling Techniques 2