A LEED project requires that 75% of construction waste be diverted from landfills. The project generated 240 tons of waste, and 185 tons were recycled or reused. Does this meet the LEED requirement?
Correct Answer
A) Yes, 77% was diverted which exceeds the 75% requirement
185 tons diverted ÷ 240 tons total = 0.77 or 77%. This exceeds the 75% LEED requirement for construction waste diversion from landfills.
Why This Is the Correct Answer
The calculation is straightforward: 185 tons diverted ÷ 240 tons total = 0.7708 or 77.08%. This rounds to 77%, which clearly exceeds the LEED requirement of 75% waste diversion from landfills. The project successfully meets the sustainability requirement by diverting more waste than the minimum threshold.
Why the Other Options Are Wrong
Option B: No, only 73% was diverted which is below the 75% requirement
This option contains a calculation error. The correct calculation is 185 ÷ 240 = 0.77 or 77%, not 73%. This appears to be a distractor answer using incorrect math to confuse test-takers.
Option C: Yes, 180 tons exceeds the minimum requirement
This option focuses on the absolute tonnage (180 tons) rather than the required percentage calculation. LEED requirements are based on percentages of total waste, not absolute tonnage amounts, making this reasoning fundamentally flawed.
Option D: No, the calculation method is incorrect for LEED compliance
The calculation method shown (diverted waste ÷ total waste × 100) is the correct standard method for determining waste diversion percentages in LEED projects. There is no error in the calculation methodology used.
Memory Technique
Remember 'Divide and Decide': Divide the diverted amount by total amount, then decide if it meets the percentage requirement. For LEED waste diversion, think '3/4 rule' - you need to divert at least 3 out of every 4 tons (75%).
Reference Hint
Look up LEED certification requirements and sustainable construction practices in the green building/environmental compliance section of your contractor reference manual.
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