Question

Problem 3: In a hospital the chl that at any time there is 0.3 grams of chloroform in t are confined so there is no evaporation. oroform storage tank is leaking into the water supply, so he 5 m3 water storage tank. The tanks Calculate the risks of b employees. Are these acceptable? (20 pts) a) th cancer and undesirable health effects for lifetime b) If the lid is left off the water storage tank, the chloroform will begin to evaporate with a half-life of 4 hours. How long will the water in the tank need to sit be for it to be safe to drink? (10 pts)

Answer 1

According to EPA chloroform limit in drinking water is 100 micro gram per liter for a safe side take this limit to be 50 micro gram per liter then above concentration of 60 micro gram per liter is not safe

Risks of chloroform exposure

Epidemiologic studies suggest an association between cancer of the large intestine, rectum,or bladder and the constituents of chlorinated drinking water, including chloroform. However, there are no epidemiologic studies of water containing only chloroform.

(1) Chloroform has been shown to be carcinogenic in animals after oral exposure, resulting in an increase in kidney and liver tumors.

(2) EPA considers chloroform to be a probable human carcinogen and has ranked it in EPA's Group B2.

(3) EPA has determined that although chloroform is likely to be carcinogenic to humans by all routes of exposure under high-exposure conditions that lead to cell death and regrowth in susceptible tissues, chloroform is not likely to cause cancer in humans by any route of exposure under exposure conditions that do not cause cell death and regrowth. Therefore, EPA has not derived either an oral carcinogenic potency slope or an inhalation unit risk for chloroform

in the second problem after 4 hours water will be absolutely safe for drinking