Table 1.
Number of chemicals used and their summed masses per event for oil and gas development (does not include water)a.
Fig 1.
Venn diagram showing number of chemicals used in oil and gas production.
The first number represents chemicals with CASRN and the number in parentheses represents the total number of reported chemicals. Does not include base fluids. Acidizing includes matrix acidizing, acidizing, and maintenance acidizing.
Fig 2.
Venn diagram showing number of chemicals used for acidizing operations (routine and well stimulation).
The first number represents chemicals with CASRN and the number in parentheses represents the total number of reported chemicals. Does not include base fluids.
Fig 3.
Concentrations of hydrochloric acid (HCl) used in acidizing.
Sixteen events where water was not reported were excluded because the concentrations could not be calculated.
Fig 4.
Concentrations of hydrofluoric acid (HF) used in acidizing.
Sixteen events where water was not reported were excluded because the concentrations could not be calculated.
Table 2.
Data availability for chemicals used in routine oil and gas development.
Table 3.
Chemicals used in routine oil and gas development that are classified by the United Nations Globally Harmonized System (GHS) Categories 1 and 2 for acute mammalian toxicitya.
Table 4.
Chemicals used in routine oil and gas development that are classified by the United Nations Globally Harmonized System (GHS) in Categories 1 and 2 for ecotoxicitya.