Suspicious that their household drinking water from a well was somehow being contaminated with gasoline, a family living in a farmhouse investigated possible sources of groundwater contamination Sure enough, the underground storage tanks for gasoline at a nearby filling station were leaking. Promising to pay to fix the problem, the station owners sealed the gas tank and pumped out the contaminated groundwater. After several months of rain, the groundwater supplies were restored and the water in the well was safe to drink. This situation illustrated an example of
A) reverse osmosis refinement.
B) maximum containment remuneration.
C) groundwater remediation.
D) well-water containment.
C
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Which of the following clouds is characterized as a middle cloud?
A. cirrocumulus B. cumulonimbus C. stratocumulus D. altostratus
When a solution of Cu(II) chloride, CuCl2 , is added to a solution of potassium sulfide, K2S, a black precipitate of copper sulfide, CuS, forms. Which of the following is the total ionic equation for this reaction?
A) CuCl2(aq) + K2S(aq) ? CuS(s) + 2 KCl(aq) B) Cu2+(aq) + Cl22-(aq) + K22+(aq) + S2-(aq) ? CuS(s) + K22+(aq) + Cl22-(aq) C) Cu2+(aq) + 2 Cl-(aq) + 2 K+(aq) + S2-(aq) ? CuS(s) + 2 K+(aq) + 2 Cl- (aq) D) Cu2+(aq) + S2-(aq) ? CuS(s)
Which of the following scenarios could result in the exposure of the feature in this image?
A) Rising sea level floods this part of the shoreline. B) Longshore currents deposit sand. C) Rip currents remove beach deposits. D) Tectonic activity raises the landscape.
Urban is defined by the U.S. Census Bureau as ________
A) an area with more than 10 million inhabitants B) a large central city and adjacent communities C) an area where the average population density is at least 500 people per square mile D) the parts of a metropolitan area located outside the central city E) areas where patches of commercial and residential developments are interspersed in a matrix of rural land