TLV of lead for public sewer/waste water is about ______________ ppm?
Correct answer: A. 1
- A. 1
- B. 25
- C. 150
- D. 650
Explanation
The permissible lead concentration associated with public sewer or wastewater discharge is about 1 ppm. Lead is tightly limited because it is toxic and can accumulate in organisms and treatment sludges.
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