Code of Colorado Regulations
400 - Department of Natural Resources
404 - Oil and Gas Conservation Commission
2 CCR 404-1 - PRACTICE AND PROCEDURE
Section 437 - Hydraulic Fracturing Chemical Additives
Current through Register Vol. 47, No. 17, September 10, 2024
a. Effective Date. After January 15, 2021, Operators will not use the chemicals listed in Table 437-1 as additives in Hydraulic Fracturing Fluid.
b. This Rule 437 does not prevent Operators from recycling or reusing produced water that has naturally occurring, trace amounts of chemicals listed in Table 437-1.
c. For any chemical constituent listed in Table 437-1 for which Table 915-1 also provides a standard, the concentration in recycled or reused produced water will be below the Table 915-1 standard, or the unconcentrated naturally occurring background level, whichever is greater.
TABLE 437-1. Chemical Additives Prohibited in Hydraulic Fracturing Fluid
|
Ingredient Name |
CAS # |
|
Benzene |
71-43-2 |
|
Lead |
7439-92-1 |
|
Mercury |
7439-97-6 |
|
Arsenic |
740-38-2 |
|
Cadmium |
7440-43-9 |
|
Chromium |
7440-47-3 |
|
Ethylbenzene |
100-41-4 |
|
Xylene |
1330-20-7 |
|
1,3,5-trimethylbenzene |
108-67-8 |
|
1,4-dioxane |
123-91-1 |
|
1-butanol |
71-36-3 |
|
2-butoxyethanol |
111-76-2 |
|
N,N-dimethylformamide |
68-12-2 |
|
2-ethylhexanol |
104-76-7 |
|
2-mercaptoethanol |
60-24-2 |
|
benzene, 1,1'-oxybis-,tetrapropylene derivatives, sulfonated, sodium salts (BOTS) |
119345-04-9 |
|
butyl glycidyl ether |
8-6-2426 |
|
Quaternary ammonium compounds, dicoco alkyldimethyl, chlorides (QAC) |
61789-77-3 |
|
Bis hexamethylene triamine penta methylene phosphonic acid (BMPA) |
35657-77-3 |
|
Diethylenetriamine penta (methylene- phosphonic acid) (DMPA) |
15827-60-8 |
|
FD&C blue no. 1 |
3844-45-9 |
|
Tetrakis (triethanolaminato) zirconium (IV) (TTZ) |
101033-44-7 |
