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METAL SURFACE FINISHING
Operate and control waste treatment
process in metal surface finishing
operations
level:
3
credit:
10
planned review date:
December 2002
sub-field:
Mechanical Engineering
purpose:
People credited with this unit standard are able, using their
understanding of waste disposal, to operate and control
waste treatment processes for surface finishing effluents,
including those from continuous process lines.
entry information:
Demonstrated competence in safe working practices in the
metal surface finishing industry is useful to those seeking
credit for this unit standard. This could be evidenced by
credit for Unit 2824, Follow safe working practices on an
engineering worksite.
accreditation option:
Evaluation of documentation and visit by NZQA.
moderation option:
A national moderation system of regional panels and
assessor networks has been established by Competenz.
special notes:
Worksite procedure refers to the documented procedures for
the machine and/or worksite.
All work practices must meet recognised codes of practice
and documented worksite safety procedures (where these
exceed code) for person, product and worksite safety, and
must meet the obligations required under current legislation.
 New Zealand Qualifications Authority 2016
2358 version 5
28-Jun-16
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METAL SURFACE FINISHING
Operate and control waste treatment
process in metal surface finishing
operations
Acts, Regulations, and By-Laws regarding the handling of
toxic material and waste are to be complied with.
Elements and Performance Criteria
element 1
Identify the principles involved in waste disposal.
performance criteria
1.1
Hazardous materials are identified.
Range:
1.2
includes cyanides, hexavalent chromium, heavy metal cations,
anions, oils, greases, organic material.
Methods used to treat and dispose of waste materials in accordance with
worksite procedure are explained.
Range:
consequences of non-compliance and range of site equipment;
methods used include one or more of the following - chemical
treatments, grease entrapment, metals precipitation and
separation, ion exchange, reverse osmosis, and gas scrubbing;
and involve full or partial recovery of waste waters and chemicals.
 New Zealand Qualifications Authority 2016
2358 version 5
28-Jun-16
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METAL SURFACE FINISHING
Operate and control waste treatment
process in metal surface finishing
operations
element 2
Monitor and test effluent quality.
Range:
may include chemical analysis of solutions.
performance criteria
2.1
Recording devices are checked for accurate operation according to worksite
procedure.
2.2
Process parameters are checked, tested, and recorded to establish
waste/effluent levels according to worksite procedure.
2.3
Process adjustments are made to control effluent quality to specification
according to worksite procedure.
Range:
process parameters may include - pH, temperature, and flow rate;
purification treatments may involve - carbon filtration, impurity
oxidation and/or filtration, current density electrolysis, sludge
removal.
element 3
Dispose of waste by-product.
performance criteria
3.1
Waste from production processes is disposed of in accordance with worksite
procedure, Acts, Regulations, and By-Laws.
3.2
Waste disposal records are completed in accordance with worksite procedure.
 New Zealand Qualifications Authority 2016
2358 version 5
28-Jun-16
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METAL SURFACE FINISHING
Operate and control waste treatment
process in metal surface finishing
operations
3.3
Accidental spill procedures are followed and recorded in accordance with
worksite procedure.
Comments to:
Competenz
Unit Standard Revision
PO Box 160
WELLINGTON
by December 2002.
Please Note:
Providers must be accredited by the Qualifications Authority
before they can offer programmes of education and training
assessed against unit standards.
Accredited providers assessing against unit standards must
engage with the moderation system that applies to those unit
standards. [Please refer to relevant Plan ref: 0013]
 New Zealand Qualifications Authority 2016