(a) The Service may access your area of operations at any time to monitor the effects of your operations to ensure compliance with the regulations in this subpart.

(b) The Service may determine that third-party monitors are necessary to ensure compliance with your operations permit and to protect Service-administered lands and waters, or the resources of refuges, visitor uses and experiences, and visitor or employee health and safety.

(1) The Service's determination will be based on the scope and complexity of the proposed operation, reports that you are required to submit under paragraph (e) of this section, and whether the refuge has the staff and technical ability to ensure compliance with the operations permit and any provision of this subpart.

(2) A third-party monitor will report directly to the Service at intervals determined by the Service. We will make the information reported available to you upon your request.

(3) You will be responsible for the cost of the third-party monitor.

(c) You must notify the Service within 24 hours of any injuries to or mortality of fish, wildlife, or endangered or threatened plants resulting from your operations.

(d) You must notify the Service of any accidents involving serious personal injury or death and of any fires or spills on the site immediately after the accident occurs. You must submit a full written report on the accident to the Service within 90 days after the accident occurs.

(e) Upon our request, you must submit reports or other information necessary to verify compliance with your permit or with any provision of this subpart. To fulfill this request, you may submit to us reports that you have submitted to the State under State regulations, or that you have submitted to any other Federal agency to the extent they are sufficient to verify compliance with permits or this subpart.

(f) If your operations include hydraulic fracturing, you must provide the Service with a report including the true vertical depth of the well, total water volume used, and a description of the base fluid and each additive in the hydraulic fracturing fluid, including the trade name, supplier, purpose, ingredients, Chemical Abstract Service Number (CAS), maximum ingredient concentration in additive (percent by mass), and maximum ingredient concentration in hydraulic fracturing fluid (percent by mass). The report must be either submitted through FracFocus or another Service-designated database.