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shop located at Pad 2 excepting events where equipment cannot be moved until it is <br /> repaired. <br /> Power to the mine is provided by a prime generator that is composed of two computer- <br /> controlled Caterpillar (Cat 27) motor/generators (collectively, a genset). The prime power <br /> genset operates on diesel fuel, which is stored in a 12,000 gallon above-ground storage <br /> tank. Fuel from the bulk tank is pumped to a smaller 100 gallon above-ground tank (the <br /> day tank) that provides fuel directly to the genset. Both tanks are double walled and the <br /> 100 gallon day tank is located within the generator container (Conex) that houses the <br /> genset. As described more fully below, the spill that occurred at the site was a result of <br /> accidental overfilling of the day tank. <br /> Rule 8.2.3 and Inspection Report Responses <br /> 1. Actions taken to respond to and correct the effects of the spill. <br /> Response: As discussed more fully below under headings `Timeline' and `Appendix F: <br /> HRL monitoring and remediation designs', the following actions were taken to respond to <br /> and mitigate the effects of the spill: (i) reinforcement of the pre-existing sump berm that <br /> was located at the toe and northern edge of the sump, (ii) segregation of fuel-stained soils, <br /> (iii) inspection and disconnection of the primary generators, (iv) clean water flushing and <br /> pumping of the road fill materials that were impacted by the spill, (v) introduction of <br /> Micro-Blaze®, a patented safe microbial treatment media, to capture hydrocarbons <br /> trapped within the fill, (vi) removal and disposal of contaminated water and soil, and (vii) <br /> implementation of short and long term water sampling. Each of these activities was <br /> undertaken to prevent migration of fuel from the immediate spill site and was judged <br /> reasonable and necessary to contain the spill and prevent fuel from entering Yule Creek. <br /> 2. Any known or anticipated adverse impacts to persons or property. This should <br /> include information regarding impact to Yule Creek. <br /> Response: As noted above, there were no detectable or measured impacts to Yule Creek <br /> and, given the response actions taken and to be taken, none are expected. <br /> 3. Monitoring and analyses that are necessary to evaluate the situation and <br /> corrective action along with copies of all pertinent data. <br /> Response: Generally speaking, the monitoring and remediation plan includes installation <br /> of the bioremediation ports, installation of monitoring wells, and continued water <br /> sampling. The bioremediation plan was prepared by HRL Compliance Solutions and is <br /> presented in `Appendix F: HRL monitoring and remediation designs.' A long-term water <br /> sampling plan will be provided by HRL once the planned monitoring wells are installed. <br /> Mitigation activities undertaken to prevent migration of the fuel and completed as of the <br /> approximate date of this report include: (i) collection and appropriate disposal of <br /> contaminated water, (ii) collection and appropriate disposal of contaminated surface soils <br /> in the immediate vicinity of the genset Conex, and (iii) fortification of the sump that <br /> 3 <br />