Assertion: butane | /r/HasProperty | blended with the petroleum
Facets:
Source sentences:
text: In a preferred embodiment the blend ratio and blend rate calculations are based upon the time of year in which the blending occurs, the delivery location for the blended gasoline and/or the type of petroleum flowing through the pipeline, because each of these variables governs the allowable vapor pressure in the gasoline, or whether butane can be blended with the petroleum at all.