Commitments and Contingencies Legal Proceedings We are routinely involved in various legal and administrative proceedings, including tax audits, incidental to the ordinary course of our business, none of which we expect, individually or in the aggregate, to have a material adverse effect on our business, financial condition, results of operations or cash flows. Environmental Contingencies Extensive environmental laws regulate our operations and properties. These laws may require us to investigate and clean up hazardous substances, including petroleum or natural gas products, released at our owned and leased properties. Governmental entities or third parties may hold us liable for property damage and personal injuries, and for investigation, remediation and monitoring costs incurred in connection with any contamination and regulatory compliance. We use both underground storage tanks and above ground storage tanks to store petroleum products, natural gas and waste at our locations. We must comply with environmental laws regarding tank construction, integrity testing, leak detection and monitoring, overfill and spill control, release reporting and financial assurance for corrective action in the event of a release. At some locations we must also comply with environmental laws relative to vapor recovery or discharges to water. Under the terms of our leases, we generally have agreed to indemnify HPT for any environmental liabilities related to properties that we lease from HPT and we are required to pay all environmental related expenses incurred in the operation of the properties. Under an agreement with Shell, we have agreed to indemnify Shell and its affiliates from certain environmental liabilities incurred with respect to our travel centers where natural gas fueling lanes are installed. From time to time we have received, and in the future likely will receive, notices of alleged violations of environmental laws or otherwise have become or will become aware of the need to undertake corrective actions to comply wit