At the Gould Battery site in Portland, OR, which two of the following were major

Question

At the Gould Battery site in Portland, OR, which two of the following were major COPCs: a. Nickel b. DDT c. Lead d. Cadmium e. Hexavalent chromium Sulfuric acid Which two of the following are advantages of upland confined disposal of contaminated sediments as compared to in-water confinement" a. Direct access for easy monitoring. b. Avoids loss of waterfront property. c. Eliminates visual appearance of the disposal site. d. Relatively easy and conventional construction techniques. e. Less risk of groundwater contamination. f. Minimizes or eliminated dredging of contaminated sediments. Which three of the following circumstances at a contaminated field site would be useful in making the case that monitored natural attenuation is an appropriate and possible course of action: a. A thorough site investigation and conceptual model has been completed b. There is no variation in the measure dissolved oxygen in groundwater c. Higher levels of carbon dioxide are observed in the vicinity of the plume d. The has been no variation in the size or extent of the plume in three years e. An absence of reaction daughter products A site is extensively contaminated with chlorinated volatile organic solvents like PCE. Only the saturated zone of the subsurface (below approximately 10 m depth) is presently contaminated. The solvents are present in both aqueous (dissolved) form and as free product. Which three of the following remediation techniques could be effective for cleanup? a. Soil vapor extraction (only) b. Soil excavation C. Pump and treat d. Air sparging with soil vapor extraction e. Injection of oxygen-releasing compound (ORC) f. Injection of hydrogen-releasing compound (HRC)

Explanation / Answer

1.)Popular COPCs contaminants are:

1.Lead

2.zinc

3.Arsenic

4.Furans

5.chromium

6.Cadmium

7.mercury

8.Dioxins

so Lead and cadmium are two major COPCs

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