I would not say that gas was "packed" or "packaged" I would say gas was put into containers, although that is not a verb, we would use a noun in English.

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Note added at 4 hrs (2009-10-11 16:11:11 GMT)
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It could refer to container types.

The National Landfill Gas Consortium , LLC is a cooperative effort of Leonard Frost Levin & Van Court, PC, Public Financial Management, Inc., and Energy Services Provider Group or related entities. NLGC helps landfill operators and landfill gas (LFG) developers optimize, “bundle” and place with its network of institutional investors Section 29 tax credits potentially available from qualified sales of landfill gas. “Bundling” can achieve economies of scale that secure these benefits for smaller as well as large landfills. It can help all landfills secure funding to meet or exceed applicable environmental requirements while generating substantial revenue streams. NLGC builds on its principals' 1995/6 experience helping to document and place tax credits from the largest single Section 29 transaction to date. NLGC placed nearly $40,000,000 in credits from landfill projects in several states during 1998/9, in general providing payments to qualifying developers in amounts approaching 80 cents per dollar of tax credit, plus significant up-front cash. This translates to roughly $5,000,000 in additional gross revenue for a typical qualifying project.

Packaging is the science, art and technology of enclosing or protecting products for distribution, storage, sale, and use. Packaging also refers to the ...
en.wikipedia.org/.../Packaging_and_labeling - Προσωρινά αποθηκευμένη - Παρόμοιες
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DISEÑO DE PACKAGING envases y etiquetas - [ Μετάφραση αυτής της σελίδας ]Diseño de packaging profesional, creamos envases, etiquetas, cajas, etc. 15 profesionales, 7 años y más de 200 proyectos para su tranquilidad.
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Note added at 5 ημέρες (2009-10-16 14:08:17 GMT) Post-grading
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¿y de donde sacaste que es packing y no packaging?