154 by nuhman10

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Fix copper chrome arsenic preservatives in wood using heat assistance

Level                             3

Credits                           5

Purpose       People credited with this unit standard are able to: demonstrate knowledge of
              the principles and purpose of the copper chrome arsenic (CCA) fixation
              process; demonstrate knowledge of the operation of CCA fixation plants;
              demonstrate knowledge of fixation schedules and documentation
              requirements; identify, explain and apply safety and security requirements for
              CCA fixation plants; assess the suitability of wood for the CCA fixation
              process; operate the CCA fixation plant and monitor charge and plant
              performance; assess and confirm CCA fixation effectiveness, complete
              documentation, and manage non-conforming product; and apply
              maintenance requirements for the on-site CCA fixation plant.


Subfield                          Solid Wood Manufacturing

Domain                            Timber Drying and Treatment

Status                            Registered

Status date                       18 December 2006

Date version published            18 December 2006

Planned review date               31 December 2011

Entry information                 Recommended: Unit 159, Demonstrate knowledge of
                                  environmental issues in wood manufacturing industries;
                                  Unit 16240, Interpret legislative requirements and
                                  workplace compliance relating to wood preservation
                                  operations; or demonstrate equivalent knowledge and
                                  skills.

Accreditation                     Evaluation of documentation and visit by NZQA and
                                  industry.

Standard setting body (SSB)       Forest Industries Training and Education Council
                                  (FITEC)

Accreditation and Moderation Action Plan (AMAP) reference                  0173
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.




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Special notes

1   Definition
    Worksite documentation refers to instructions to staff on policy and procedures
    (including the application of legislation to worksite situations), which are formally
    documented, and are available for reference at the worksite. Examples are standard
    operating procedures, specifications, manuals, and manufacturer's information.

2   This unit standard refers to copper chrome arsenic (CCA) treatment plants, which
    have been modified to accommodate the heat assisted fixation process or have a
    fixation plant separate from the CCA treatment plant.

3   Evidence of the elements of this unit standard must be presented across the context
    of 12 charges.

4   References
    Competence in this unit standard requires knowledge of the following:
    a    NZS 3640:2003A1 Chemical Preservation of Round and Sawn Timber
         Amendment 1. This is referred to below as ‘NZS 3640’, and is available from
         Bennett’s Government Bookshops or online at http://www.standards.co.nz.
    b    New Zealand Timber Preservation Council, Timber Preservation Quality Manual
         (Wellington, 2005). This is referred to below as the ‘TPQM’.
    c    Best Practice Guideline for the Safe Use of Timber Preservatives and
         Antisapstain Chemicals (Wellington, 2005). This is referred to below as the
         ‘Guideline’. These last two references are available through the New Zealand
         Timber Preservation Council, Wellington or online at http://www.nztpc.co.nz.

5   The reference text for this unit standard is: Demonstrate Knowledge of Wood
    Preservation (Auckland: FITEC, 2002) and available from FITEC, PO Box 167 037,
    Parnell, Auckland.

6   The following apply to the performance of all elements of this unit standard:
    a    All work practices must meet recognised codes of practice and documented
         worksite health and safety and environmental procedures (where these exceed
         the code) for personal, product and worksite health and safety, and must meet
         the obligations required under current legislation, including the Hazardous
         Substances and New Organisms Act 1996, the Health and Safety in
         Employment Act 1992, the Resource Management Act 1991, and their
         subsequent amendments.
    b    All work practices must meet documented worksite operating procedures. This
         includes the recording (by electronic or non-electronic means) of activities,
         events, and decisions.
    c    All evidence of communications gathered in relation to this unit standard must
         be in accordance with worksite procedures for content, recipient, timing and
         method.




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Elements and performance criteria

Element 1

Demonstrate knowledge of the principles and purpose of the copper chrome arsenic
(CCA) fixation process.

Performance criteria

1.1       Commercial, economic and environmental benefits of fixing CCA preservatives
          in wood are described in accordance with the reference text.

1.2       Principles and purpose of CCA fixation process are described in terms of the
          reaction of wood compounds with CCA preservative components in accordance
          with the reference text.

1.3       Factors influencing the CCA fixation process in terms of the degree of fixation
          and the equivalent fixation time are described in accordance with the reference
          text.

          Range        factors – wood species, preservative, preservative uptake and
                       concentration, heat, wood temperatures and heat energy transfer.

1.4       CCA preservative treatment methods, wood types and species which are
          compatible with the heat fixation process are identified in accordance with
          worksite documentation and the reference text.

1.5       CCA treated products which require heat assisted fixation on-site are identified
          in accordance with worksite documentation.

Element 2

Demonstrate knowledge of the operation of CCA fixation plants.

Performance criteria

2.1       Role, scope and responsibilities of the CCA fixation plant operator are described
          in accordance with worksite documentation.

2.2       Operating parameters, capability and capacity of the on-site CCA fixation plant
          are described in accordance with worksite documentation.

          Range        may include but is not limited to – plant design and layout,
                       maximum and minimum charge volumes (sawn and round wood),
                       packet build and length, minimum pressure and/or temperature
                       requirements, fixation schedules, throughput capacity.




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2.3       Factors for consideration when scheduling CCA fixation charges to optimise
          production throughputs are explained in accordance with worksite
          documentation.

          Range         factors may include but are not limited to – priority order
                        timetabling, species and product suitability and availability, fixation
                        schedule requirements, anticipated charge duration and heat
                        availability, drip and storage considerations.

2.4       Operating components of the CCA fixation plant are identified and their function
          and sequence of operation are explained in accordance with the Guideline and
          worksite documentation.

          Range         may include but is not limited to – plant design and layout, treating
                        vessel and door safety mechanisms, valves, pipe work linkages,
                        heat source, live steam or heat transfer pipe work, automatic and
                        manual control systems, gauges, thermostats, warning devices
                        and product handling systems, drip recovery areas.

Element 3

Demonstrate knowledge of fixation schedules and documentation requirements.

Performance criteria

3.1       Documentation and charge sheet record requirements are identified and their
          use explained in accordance with worksite documentation.

          Range         includes but is not limited to – charge sheets, production log
                        books.

3.2       Fixation schedules required for different timber characteristics are described in
          accordance with worksite documentation and the reference text.

          Range         species, size, thickness, sawn timber, roundwood.

Element 4

Identify, explain and apply safety and security requirements for CCA fixation plants.

Performance criteria

4.1       Hazardous areas associated with the on-site CCA fixation plant site, its
          operation and safety and security measures, are identified and risks are
          explained in accordance with the Guideline, legislative requirements and
          worksite documentation.

          Range         may include but is not limited to – warning signs and symbols,
                        automatic and remote control mechanisms, loading and unloading
                        mechanisms, live steam or heat transfer pipework, heat exhaust
                        vents, valves and gauges.




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4.2       Risk factors associated with the on-site CCA fixation plant and the safeguards
          required are explained in accordance with Material Safety Data Sheets (MSDS),
          the Guideline and legislative requirements.

          Range         may include but is not limited to – toxicity, flammability.

4.3       Safety devices and features are identified, and their operating principles are
          explained in accordance with the Guideline, legislative requirements and
          worksite documentation.

          Range         may include but is not limited to – door safety devices, heat
                        venting, pressure relief valves, warning devices, pipe work,
                        lagging.

4.4       Safe operating and housekeeping practices are explained in accordance with
          the Guideline, legislative requirements and worksite documentation.

          Range         may include but is not limited to – safe operating practices, codes
                        of conduct and personal hygiene, appropriate personal protective
                        clothing and equipment, first aid facilities, emergency procedures.

Element 5

Assess the suitability of wood for the CCA fixation process.

Performance criteria

5.1       Treatment suitability of each fixation charge is assessed and confirmed and
          non-complying product is removed in accordance with worksite documentation.

          Range         may include but is not limited – charge composition, packet
                        building strapping, product identification and treatment hazard
                        class specification attainment.

5.2       Information for calculating fixation schedules is collected and applied for
          different timber characteristics in accordance with worksite documentation.

          Range         may include but is not limited – species, size, thickness, sawn
                        timber, roundwood.

Element 6

Operate the CCA fixation plant and monitor charge and plant performance.

Performance criteria

6.1       Critical factors influencing successful charge performance are explained and
          applied in accordance with the reference text and worksite documentation.

6.2       Appropriate fixation schedule is applied in accordance with the technical
          advisor’s recommendations and worksite documentation.




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6.3      Process is operated and controlled in accordance with worksite documentation.

         Range         loading, pre-start checks and recordings, start-up, fixation
                       schedules and duration, termination, unloading.

6.4      Charge and plant performance are monitored and corrective action taken in
         accordance with worksite documentation to ensure complete fixation.

6.5      Timber is held in the fixation vessel for time, temperature or pressure
         requirements in accordance with the technical advisor’s recommendations and
         worksite documentation.

6.6      Equipment faults and malfunctions in the process cycle are identified and
         corrective action taken in accordance with worksite documentation.

         Range         may include but is not limited to – electrical, hydraulic, mechanical,
                       heat supply factors.

6.7      Charge is released from the drip recovery area once drip-free or in accordance
         with the Guideline and worksite documentation.

6.8      Environmental measures are observed and preservative drip recovery and
         contaminated water are handled in accordance with the Guideline and worksite
         documentation.

Element 7

Assess and confirm CCA fixation effectiveness, complete documentation and manage
non-conforming product.

Performance criteria

7.1      Treatment compliance is determined from the fixation schedule appropriate to
         the charge composition, plant performance, product testing and fixation records,
         and complying product is identified in accordance with worksite documentation.

7.2      Fixation charge records are completed in accordance with worksite
         documentation.

7.3      Non-conforming product is isolated and alternative arrangements are made for
         its use in accordance with worksite documentation.




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Element 8

Apply maintenance requirements for the on-site CCA fixation plant.

Performance criteria

8.1       Routine and preventative maintenance and cleaning requirements are identified,
          explained and applied in accordance with the Guideline, legislative
          requirements and worksite documentation.

          Range         may include but is not limited to – plant maintenance schedules
                        and log books, plant and equipment calibration, vessel and/or
                        plant authorised certification, valves, gauges, lubrication,
                        contaminated water and/or drip recovery recycling, waste/sludge
                        removal and authorised disposal.

Please note

Providers must be accredited by the Qualifications Authority, or an inter-institutional body
with delegated authority for quality assurance, before they can report credits from
assessment against unit standards or deliver courses of study leading to that assessment.

Industry Training Organisations must be accredited by the Qualifications Authority before
they can register credits from assessment against unit standards.

Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.

Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.

Comments on this unit standard

Please contact the Forest Industries Training and Education Council
feedback@fitec.org.nz if you wish to suggest changes to the content of this unit standard.




                                                                New Zealand Qualifications Authority 2011

								
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