Exercises: Comparing with regulation limits
Practice★★☆
An air quality standard sets the ozone limit at 0.095 ppm as an 8-hour average. A monitoring station in Mexico City records 0.070 ppm on Monday and 0.120 ppm on Tuesday.…
An air quality standard sets the ozone limit at 0.095 ppm as an 8-hour average. A monitoring station in Mexico City records 0.070 ppm on Monday and 0.120 ppm on Tuesday. State on which day the limit is exceeded and explain one measure that authorities usually recommend to the population when ozone is high.
Practice★★★
A drinking water standard sets the arsenic limit at 0.01 ppm. The analysis of a community's well reports 0.018 ppm of arsenic. Express both values in $\text{mg/L}$,…
A drinking water standard sets the arsenic limit at 0.01 ppm. The analysis of a community's well reports 0.018 ppm of arsenic. Express both values in $\text{mg/L}$, calculate how many times the limit is exceeded, and write a short recommendation for the authorities: can that water still be used for drinking? What options would you propose (treatment, another source, mixing with clean water)? Justify your proposal with the data.