2 Colo. Code Regs. § 404-1-437

Current through Register Vol. 47, No. 20, October 25, 2024

Section 2 CCR 404-1-437 - Hydraulic Fracturing Chemical Additives

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

2 CCR 404-1-437

37 CR 16, August 25, 2014, effective 9/30/2014

38 CR 01, January 10, 2015, effective 2/14/2015

38 CR 03, February 10, 2015, effective 3/2/2015

38 CR 07, April 10, 2015, effective 4/30/2015

38 CR 16, August 25, 2015, effective 9/14/2015

39 CR 04, February 25, 2016, effective 3/16/2016

41 CR 05, March 10, 2018, effective 4/1/2018

41 CR 06, March 25, 2018, effective 5/1/2018

41 CR 23, December 10, 2018, effective 12/30/2018

42 CR 02, January 25, 2019, effective 2/14/2019

42 CR 17, September 10, 2019, effective 9/30/2019

42 CR 24, December 25, 2019, effective 1/14/2020

43 CR 17, September 10, 2020, effective 9/30/2020

43 CR 13, July 10, 2020, effective 11/2/2020

43 CR 24, December 25, 2020, effective 1/15/2021

45 CR 07, April 10, 2022, effective 4/30/2022

45 CR 09, May 10, 2022, effective 5/30/2022

45 CR 13, July 10, 2022, effective 7/30/2022