Which of the following materials are used as landfill salients for the control of gas and leachate moments ?1. Lime2. Sand3. Bentonite4. Fly ash5. Butyl rubberSelect the correct answer from the codes given below :

Which of the following materials are used as landfill salients for the

1.	Which of the following materials are used as landfill salients for the control of gas and leachate moments ?1. Lime2. Sand3. Bentonite4. Fly ash5. Butyl rubberSelect the correct answer from the codes given below :
A.	1, 2 and 3
B.	4 and 5
C.	3 and 5
D.	1, 2 and 4
Answer» D. 1, 2 and 4

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Which of the following materials are used as landfill salients for the control of gas and leachate moments ?1. Lime2. Sand3. Bentonite4. Fly ash5. Butyl rubberSelect the correct answer from the codes given below :

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