Or would it be restricted by the St. Cloud Water Pollution Facilities guidelines: Any combustible, flammable or explosive solid, liquid or gas which by their nature or quantity will or are likely to cause either alone or by interactions with other substances a fire or explosion or be injurious to the treatment plant operation.
(it; will are; likely to cause either alone or by interactions with other substances a fire or explosion or be injurious to the treatment plant operation)
it
will are
likely to cause either alone or by interactions with other substances a fire or explosion or be injurious to the treatment plant operation