A LEED project requires that 75% of construction waste be diverted from landfills. If a project generates 480 tons of waste and recycles 340 tons, does it meet this requirement?
Correct Answer
D) No, it only achieves 70.8% diversion
Waste diversion rate = (340 tons recycled / 480 tons total) × 100 = 70.8%. This falls short of the required 75% diversion rate for LEED compliance.
Why This Is the Correct Answer
Option B is correct because it accurately calculates the waste diversion rate as 70.8% and correctly identifies that this does not meet the LEED requirement. The calculation shows 340 tons recycled ÷ 480 tons total × 100 = 70.8%. Since 70.8% is less than the required 75%, the project fails to meet the LEED standard. The answer correctly states both the percentage achieved and that it falls short of compliance.
Why the Other Options Are Wrong
Option A: Yes, it achieves 75.8% diversion
Option A calculates the correct percentage (70.8%) but incorrectly concludes that the project meets the requirement. Since 70.8% is less than the required 75%, the project does NOT meet LEED compliance standards.
Option C: Yes, it achieves 70.8% diversion
Option D has an incorrect calculation showing 68.2% instead of the actual 70.8%. While it correctly identifies that the project doesn't meet requirements, the mathematical error makes this answer wrong.
Memory Technique
Remember 'LEED Loves 75' - LEED projects typically require 75% waste diversion. Always check if your calculated percentage meets or exceeds this threshold.
Reference Hint
Look up LEED requirements and sustainable construction practices in the Green Building/Environmental chapter of your contractor reference manual
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