(a) Describe a vacuum sewage system. (5) (b) List the advantages of the system described in part (a) (4) (c) State why untreated sewage should not be allowed to stagnate. (1)
Sewage system
(a) Describe a vacuum sewage system. (5) (b) List the advantages of the system described in part (a) (4) (c) State why untreated sewage should not be allowed to stagnate. (1)
Sewage system
UKM Tuticorin 
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