Jeremy arrives at work around five in the morning. He awoke an hour earlier to a

Question

Jeremy arrives at work around five in the morning. He awoke an hour earlier to a call from his supervisor to get started on a new case immediately. Jeremy is an analytical chemist at FirstLabs, a hazardous materials testing laboratory. The lab provides chemical analysis for landfill sites across the country. The new case is from a local site. Jeremy finds the case report on his desk (page 3). Containment seals and sampling sites are labeled on the accompanying map. Jeremy's coworkers, Suzanna and Yan, are in the conference room. Yan is providing background information, "This landfill accepts highly toxie heavy metals, specifically mercury, bismuth, lead, groundwater, depending on the temperature and soil chemistry. There are three containment seals, each one far underground and costly to access. Samples were collected from groundwater near the seals, labeled 1-30 on the map. Site numbers 1-11 are nearest to an oil refinery that lies downstream from a landfill seal. Sites 12- 20 are close to a city water supply inlet, about a mile from another landfill seal. Sites 21-30 are from a tomato processing plant, near a third landfill seal. Analyzing the samples should tell us where the leak is. The samples with the most heavy metal cations will be the ones nearest the leaking seal area." and cadmium. cations of these metals can travel in "Is it possible that more than one containment seal is leaking?" Suzanna asked. Yan nodded, "Unfortunately, yes. Plus, the company admits the possibility of the leak starting about two months ago. This makes our job harder because you will probably find the heavy metals that are highly water soluble in even the furthest samples. So we should expect to find something in all samples, with the most ions in the samples closest to the leaking seal or seals"

Explanation / Answer

1.First lab is testing samples for heavy metals because these heavy metals will get dissolved in water samples through soil and will be dangerous for the living beings .So a control over these metals ions is must and for doing so it is essential to check the samples for heavy metals .

2.Most probably the city water supply intake is the leaking site ,as there was found the lead reports in the children there above the acceptable limits.

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