Mich. Admin. Code R. 460.2569b
Rule 69b. The following underground storage of natural gas records shall be retained for the time periods listed:
(a) Well records, reports, and logs that include data relating to pressures, injected volumes, withdrawn volumes, core analysis, daily volumes of gas injected into and withdrawn from reservoir, cushion, and working gas volumes for each reservoir. | 1 year after reservoir, field, or relevant storage area is abandoned. |
(b) Records containing information relating to reservoir gas leakage, showing the total gas leakage, and recycled gas. | 1 year after reservoir, field, or relevant storage area is abandoned. |
(c) Records on back pressure tests field data. | 1 year or until superseded. |
(d) Records on back pressure test results, gas analysis. | 1 year or until superseded. |
Mich. Admin. Code R. 460.2569b