Oil Testing

Oils within the workshop and within transformers being stored outside should be tested for PCBs where possible. Oils will be assessed to determine the potential of dermal exposure by workers to PCB-containing oils within the workshop. Chlor-N-Oil 50 ppm test rapid screening test kits, manufactured by Dexsil, Connecticut, USA, will be used for this testing. The proportion of transformers containing PCB-laden oils will be combined with data obtained during interviews in order to assess this exposure pathway.

Pre-sampling Preparation

  • Locate site
  • Fill out data sheet (use soil data sheet)
  • Prepare sampling jars
    Wear a dust mask

Clean Sampling Equipment

  • Put on gloves, rinse gloves with clean water
  • First scrub equipment with sparkleen
  • Rinse with clean water (3x)
  • Rinse with acetone
  • Rinse with hexane

Sample Collection

  • Use a broom on site to collect a small pile of dust to sample
  • Preferably do not sample from an existing pile
  • Collect one sample per room
  • Homogenize dust sample in stainless steel tray
  • Transfer samples to pre-labeled bottles
  • Do a final check to ensure that the labels and field sheet are complete

Final Checks

  • Ensure that jar and lid are labeled correctly;
  • Secure the label with clear plastic tape around the jar;
  • Put the jar into the cooler; and
  • Ensure that the field data sheet has been completed, including photos, site map sketch and GPS readings.
Transformer Oil Storage Drums in Vientiane, Lao PDR
Source: Hatfield Consultants
Hatfield Consultants The World Bank funded by the Canadian POPs Trust Fund through the      
Canadian International Development Agency
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