Abstract: Vehicles, systems, and methods for delivering natural gas and providing mobile fueling services are disclosed. A method of delivering natural gas includes: delivering a source vehicle to a receiving tank for receiving natural gas at a remote refueling location, the source vehicle having a natural gas engine for driving the vehicle and a source tank disposed onboard the source vehicle for storing the natural gas; and transferring natural gas from the source vehicle to the receiving tank using pressure equalization between the source tank and the receiving tank and using a compressor disposed onboard the source vehicle. The onboard compressor is operatively connected to and powered by the source vehicle engine. The source tank is adapted to store a volume greater than or equal to about 200 DGE of natural gas and supplies natural gas to power the source vehicle engine.

Abstract: Vehicles, systems, and methods for delivering natural gas and providing mobile fueling services are disclosed. A method of delivering natural gas includes: delivering a source vehicle to a receiving tank for receiving natural gas at a remote refueling location, the source vehicle having a natural gas engine for driving the vehicle and a source tank disposed onboard the source vehicle for storing the natural gas; and transferring natural gas from the source vehicle to the receiving tank using pressure equalization between the source tank and the receiving tank and using a compressor disposed onboard the source vehicle. The onboard compressor is operatively connected to and powered by the source vehicle engine. The source tank is adapted to store a volume greater than or equal to about 200 DGE of natural gas and supplies natural gas to power the source vehicle engine.

Abstract: A radon detection system is provided with the capability of monitoring certain environmental parameters together with certain other conditions indicative of possible tampering. The environmental data allows the calculation of an accurate projection of average long-term radon levels in the structure under test on the basis of a relatively short measurement period, while the tamper data indicates whether an attempt has been made to tamper with the detection unit or the measurement conditions during the test period. When an indication of possible tampering occurs, the system enters an accelerated data collection mode during which data is gathered that can later be used to determine whether tampering has actually occurred. The detection system may be provided with first and second detectors for separately monitoring airborne levels of radon gas and radon decay products.