LEGAL PROCEEDINGS Legal Proceedings (Policies)

9 Months Ended

Sep. 30, 2013

Legal Proceedings [Abstract]

Environmental costs, Policy

Environmental liabilities could exist, including cleanup obligations at these facilities or at off-site locations where we disposed of materials from our operations, which could result in future expenditures that we cannot currently quantify and which could reduce our profits. Any environmental regulatory liability relating to our operations is generally borne by the customers with whom we contract and the service providers in their capacity as transporters, disposers and recyclers. Our policy is to use our best efforts to secure indemnification for environmental liability from our customers and service providers. ISA records liabilities for remediation and restoration costs related to past activities when our obligation is probable and the costs can be reasonably estimated. Costs of future expenditures for environmental remediation are not discounted to their present value. Recoveries of environmental remediation costs from other parties are recorded as assets when their receipt is deemed probable. Costs of ongoing compliance activities related to current operations are expensed as incurred.