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  Statutory Scrubber Approval Procedures
 
The 2009 Guidelines set out two statutory approval procedures known as Scheme A and Scheme B:

• Scheme A: Unit certification with in-service parameter and emission checks.
Scheme A requires significant testing and an approval process which results in a Type Approval.

• Scheme B: Continuous emission monitoring with parameter checks.
Scheme B requires the use of sophisticated emissions monitoring equipment on a continuous basis.

Both schemes are statutory approvals. Class societies have to provide unit approval after the manufacturer’s request, approval of ship specific installation, independent verification (Class Type Approval) and verification of performance.

Scheme A permits online monitoring of the plant’s washwater effluents and operating parameters but only occasional monitoring of air emissions.

Scheme B differs in that there is online monitoring of air emissions but only periodical monitoring of washwater effluents. Scheme B assumes that MEPC Type Approval is not present and so monitoring of air emissions is required.
 
 
 
     
 
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