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Licensed for the sole use of the purchaser_See license agreement penalties for distribution. CGA G-1.8-2017 COMPRESSED GAS ASSOCIATION INC. PAGE 9 A Phase I checklist, which can be a helpful tool to identify/coordinate regulatory requirements, is provided in Appendix B. 8.2 Phase II—Development of a site-specific closure work plan From the information and data gathered during Phase I and discussions with state and/or local regulatory agen- cies, a site-specific closure work plan can be developed. This work plan can be used to obtain any necessary regulatory agency approvals and for company project management and documentation. It should include the following elements. 8.2.1 Selected pond closure option The following are the principal lime pond closure options that may be used depending upon state and local regulations; lime marketing opportunities, and the end use of the property: • Clean closure—This involves the removal of any standing water and lime to the extent practicable using commonly employed methods as described in 7.4; • Modified clean closure(lime residual)—This involves the removal of any standing water and some portion of the lime in the pond. The percentage of remaining lime depends on the amount needed for stabilizing the soil or for achieving a certain compaction ratio; or • In-place closure—This involves removing all standing water and allows all lime to remain in the excavation or to be used for fill material. Each option has a number of advantages and disadvantages. One of these options should be selected and identified in the work plan. Modified clean closures or in-place closures may require deed notifications or re- strictions. 8.2.2 Facility background and operating history This element should include a brief history of the property and a discussion of the current and historical operations at the facility, as gathered according to 8.1.1, with additional investigation as needed to clarify questions or con- cerns. A physical description of the property including surface features, buildings, fencing, vegetation, roads, access limitations, soils, and hydrology should be provided. This element may also reference the following maps and diagrams that could be incorporated in the plan: • vicinity and location maps(generally USGS 7.5 minute scale); • site-specific topographic maps; • site-grading and drainage maps; • general plot plan or facility engineering drawings; and • historical aerial photographs. 8.2.3 Description of the lime pond and characteristics of the lime This element should include a description of the lime pond in terms of physical dimensions, quantity of lime, and the physical and chemical characteristics of the lime. If available, soil and/or groundwater sampling results may also be included in this element. 8.2.4 Description of water and lime removal, dewatering, and transport methods The work plan should include a discussion of the management of standing water from the surface of the pond before removing the lime. Standing water may be managed by but is not limited to any of the following methods: • transferred into on-site portable tanks for later use or discharge; This document licensed for the sole use of the purchaser. It may not be shared with any other person or used after the expiration date without the express written permission of the CGA. Any Unauthorized use, reproduction, distribution, or modification of this printed page will result in a$5.000 liquidated damages fee plus loss of access to CGA publications for one year for your company.