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Re » !ass Closure Plan, Continued. Cadmium 1,560 Selenium 7,ggp Chromium 4,700 Silver 7,840 Cobalt 31,140 Thallium 110 Copper 62,700 Vanadium 10,100 Zinc 470,000 8.2 Sampling Quality Assurance and Quality Control Measures In order to assure the validity of the sampling results and data obtained from the samples, Standard SW-846 quality control procedures will be followed for all sample collection, preparation, and transport operations. A laboratory certified by the State of California for the applicable analyses will be utilized in all cases. All of the samples collected under this sampling plan will be labeled with the sample number, date, time, sampler's name, and the analytes requested. The samples will be preserved according to the procedures outlined in the analytical methods published in SW-846. Samples will be promptly transported to the laboratory. 10.0 Amendment of Closure Plan This plan will be amended if a significant change in facility operation occurs, including the addition of additional processing equipment, increased on-site inventory or increased facility throughput. The closure cost estimate will be reviewed at least annually by the facility operator and updated accordingly. At a minimum,the Closure Cost Estimate will be adjusted for inflation or other significant changes in costs, as required under 22 CCR Section 66273.76(b)(2). 11.0 Notification to DTSC of Expected Closure Date Once a decision has been made to close the facility, the facility operator is responsible for planning and monitoring the shutdown target dates, in order to ensure notification to the DTSC at least 180 days in advance of the planned closure. This notification date is June 30, 2060 in an event of a planned closure. The facility operator will also notify the DTSC of any changes to the closure plan as required by the California Code of Regulations. 12.0 Closure Cost Funding Mechanism and Financial Responsibility Mechanism ECS Refining uses a Certificate of Deposit payable to the Department of Toxic Substances Control as a closure cost funding mechanism. ECS Refining has obtained sufficient environmental liability insurance to satisfy applicable financial responsibility requirements coverage. A copy of the current Certificate of Deposit and Liability Insurance Certificate are included as attachments to this Closure Plan and Closure Cost Estimate. rj® C � D OCT CT 1 0 Z014t— 9/15/2014 7 ENVIRONMENTAL HEALTH DEPARTMENT