Abstract: Transportation services may provide nationwide tolling interoperability. Multi-agency electronic tolling transponders each compatible with multiple tolling agencies are provided to clients. The multi-agency transponders are linked to respective accounts associated with the clients. Transponder tolling data for respective clients is obtained from the multiple tolling agencies. Payments may be sent to each agency corresponding to the clients' respective transponder tolling data and the clients may be billed based upon the transponder tolling data.

Abstract: A method is provided for stimulating anaerobic degradation of a subsurface contaminant, comprising the steps of vaporizing liquefied petroleum gas (LPG) to form a treating gas and directing the treating gas to at least one subsurface injection site that includes the subsurface contaminant; wherein the treating gas stimulates anaerobic degradation of at least a portion of the subsurface contaminant.

Abstract: Disclosed are embodiments of a method and apparatus for the treatment of water containing silica in order to recover as much treated water from a water source as possible while minimizing the generation of waste products. Other embodiments include removing specific elements from the water source and utilizing those elements. Embodiments of the method and apparatus uses in-line physical and physio-chemical treatment methods to remove potential biological, colloidal and hardness foulants continually so that there is minimal loss of water from the water source stream and minimal addition of chemicals to accomplish removal or reduction of these potential recovery-limiting foulants.