Engine : General Subjects - 66/1128
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| By what means is biological sewage treatment plant effluent disinfected before discharge overboard? |
| A) Disinfection is not required on biological sewage treatment plants. |
| B) Ultraviolet light irradiation is the only approved means of disinfection. |
| C) Hypochlorite tablets or liquid solution and ultraviolet irradiation are both approved means of disinfection. |
| D) Hypochlorite tablets or liquid solution is the only approved means of disinfection. |
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