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HMRC internal manual

Oils Technical Manual

HM Revenue & Customs
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Gains and Losses shown in trade records: Causes of variation

Variations in loss figures may be explained by:

  1. increased rates of evaporation arising from



  1. steeply fluctuating temperatures;
  2. high winds; and
  3. changes in operational patterns (e.g. smaller receipt quantities, lower levels in storage tanks, blending innovations):


  1. accounting tolerances (e.g. 2mm in tank dips):
  2. an accident dealt with under HCOTEG152000 ’Accidents in the course of delivery’ and ‘Accidents in an installation’.