You determined that your boilers cumulatively burned 50,000,000 cubic feet of natural gas and 100,000 gallons of No. 2 fuel oil last year. You performed your own stack tests that showed that your boilers emit 0.4 lbs of PM-2.5 for every million cubic feet of natural gas burned and 1.6 lbs of PM-2.5 for every thousand gallons of No. 2 fuel oil burned. What were the total emissions of PM-2.5 last year from the boilers in tons per year? Show your work.
Total burned natural gas in one year = 50 million cu.ft.
PM 2.5 emissions => (0.4 lbs / million cu.ft natural gas) x (50 million cu.ft.) = 20 lbs/year
Total burned no. 2 fuel in one year = 100,000 gallons.
PM 2.5 emissions => (1.6 lbs / 1000 gallons no. 2 fuel) x (100 x 1000 gallons no. 2 fuel) = 160 lbs/year
Total annual PM 2.5 emissions is:
20 + 160 = 180 lbs = 0.09 tons
Thus the total emissions of PM-2.5, last year, from the boilers = 0.09 tons/year
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