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Administrative Draft Environmental Impact Report Gill Medical Center Project b. Ensure that the abandonment of gas well(s) is to current standards. If the local permitting agency,property owner, and/or developer chooses not to follow recommendation "b"for a well located on the development site property, CaIGEM believes that the importance of following recommendation "a"for the well located on the subject property increases. If recommendation "a"cannot be followed for the well located on the subject property, then CaIGEM advises the local permitting agency,property owner, and/or developer to consider any and all alternatives to proposed construction or development on the site (see comment 4 below). 4. Sections 3208 and 3255(a)(3) of the Public Resources Code give CaIGEM the authority to order the abandonment or re-abandonment of any well that is hazardous, or that poses a danger to life, health, or natural resources. Responsibility for abandonment and or re- abandonment costs for any well may be affected by the choices made by the local permitting agency,property owner, and/or developer in considering the general recommendations set forth in this letter. (Cal. Public Res. Code, 3208.1.) 5. Maintaining sufficient access to a gas well may be generally described as maintaining "rig access"to the well. Rig access allows a well servicing rig and associated necessary equipment to reach the well from a public street or access way, solely over the parcel on which the well is located. A well servicing rig, and any necessary equipment, should be able to pass unimpeded along and over the route, and should be able to access the well without disturbing the integrity of surrounding infrastructure. 6. If during development of this proposed project, any unknown well(s) is/are discovered, CaIGEM should be notified immediately so that the newly-discovered well(s) can be incorporated into the records and investigated. CaIGEM recommends that any well(s)found in the course of this project, and any pertinent information obtained after the issuance of this letter, be communicated to the appropriate county recorder for inclusion in the title information of the subject real property. This is to ensure that present and future property owners are aware of(1) the well(s) located on the property, and(2)potentially significant issues associated with any improvements near oil or gas wells. It should be noted that no well work shall be performed on any oil or gas well without written approval from CaIGEM in the form of an appropriate permit. This includes, but is not limited to, mitigating leaking fluids or gas from abandoned wells, modifications to well casings, and/or any other re-abandonment work. Given the above, the presence of a former gas well on the project site within the footprint of the Phase 2 Main Hospital building is considered a significant hazard to the public and/or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials. This is a potentially significant impact. With implementation of Mitigation Measure 4.11-2a, this impact would be reduced to less than significant with mitigation incorporated. Noise 4.11-8 October 2021