Oke
| Olu nke hopper | 0.6/0.4 m3 |
| Njehie | ±2,±5,±10g |
| Ntupu uzuzu | 18mg/m3 |
| Mkpọtụ | 80 db |
| Ike | Akpa 25-30 kwa elekere |
| Ụlọ ọrụ | 10 ma ọ bụ ahaziri |
Ngwa:
A na-ejikarị ya eme ihe maka kemịkalụ, roba, nri, elektrọn, ọgwụ na ihe ndị ọzọ na-eji ntụ ntụ eme ihe n'usoro ụlọ ọrụ njikwa ihe.
