The tolerance limit of oil and grease of sewage to be disposed on land is ____________
भूमि पर निपटाए जाने वाले सीवेज के तेल और ग्रीस की सहन सीमा ____________ है
40ppm
30ppm
20ppm
10ppm
30ppm
The tolerance limit of oil and grease of sewage to be disposed on land is 30ppm while on sea water is 20ppm.
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