UIC Class I Permit No. R9UIC-CA1-FY17-4: Chalk Cliff Limited, Maricopa, CA

UIC Class I non-hazardous waste injection well facility with one (1) existing injection well, known as Well Chalk Cliff WD-2, located at the Chalk Cliff Power Plant in Maricopa, California.

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Major Modification to UIC Permit No. R9UIC-CA1-FY17-4 (pdf) (315.79 KB, June 2, 2022)
This major modification reflects a revised method for calculating the maximum allowable surface injection pressure for Well Chalk Cliff WD-2 stipulated in Part II, Section D.3.a. of the Permit.
Minor Modification to UIC Permit No. R9UIC-CA1-FY17-4 (pdf) (224.26 KB, April 23, 2021)
This minor modification addresses specific financial assurance conditions stipulated in Paragraph II.G of Permit No. R9UIC-CA1-FY17-4 issued to Chalk Cliff Limited, Well Chalk Cliff WD-2, Maricopa, California.
Notice of Final Permit Decision (pdf) (172.39 KB, September 29, 2020)
Formal notice of the permit decision, explanation of the appeals process, and the final permit effective date for Class I Non-Hazardous Permit No. R9UIC-CA1-FY17-4 issued to Chalk Cliff Limited.
Response to Comments (pdf) (141.67 KB, September 28, 2020)
Provides a summary of the comment received during the public comment period and response to the comments concerning Class I UIC Permit No. R9UIC-CA1-FY17-4 for Chalk Cliff Limited.
Class I UIC Permit No. R9UIC-CA1-FY17-4 for Chalk Cliff Limited (pdf) (412.97 KB, September 29, 2020)
Final Class I Non-hazardous Industrial Waste Injection Well Permit No. R9UIC-CA1-FY17-4 for injection operations at Chalk Cliff Limited, Maricopa, CA.
EPA Fact Sheet: UIC Permit No. R9UIC-CA1-FY17-4 for Chalk Cliff Limited (pdf) (246.8 KB, September 29, 2020)
This Fact Sheet describes the principal facts and considerations for UIC Permit No. R9UIC-CA1-FY17-4 for Chalk Cliff Limited, including background information, facility description, and information on permit conditions.
Appendices: UIC Permit No. R9UIC-CA1-FY17-4 for Chalk Cliff Limited (pdf) (2.86 MB, August 13, 2020)
Appendices A-I to the Final Class I Non-hazardous Industrial Waste Disposal Well Permit No. R9UIC-CA1-FY17-4 for injection operations at Chalk Cliff Limited, Maricopa, CA.