Christopher Tappin was fined $11,357.14 (£7,095) in addition to his 33-month prison sentence for selling surface-to-air missile parts to Iran, a spokeswoman for the US District Court in El Paso, Texas said.
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Police are not linking the explosion of the "incendiary device" to others which have caused panic in the city.
An estimated 70,000 claimants transferred to Employment and Support Allowance (ESA) from other benefits since 2011 were underpaid.
Plastics is one of a number of environmental issues facing the world's seas, along with rising sea levels and warming oceans.