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San Diego Metropolitan Transit System Grant for CNG Fueling Station Upgrades

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The San Diego Metropolitan Transit System increased the speed of the refueling of its growing fleet of compressed natural gas-powered buses. The transit system installed high capacity fueling compressors that cut in half the time needed to refuel a Compressed Natural Gas (CNG) bus at its South Bay Maintenance Facility. The new system compares to that previous designed when the transit system had 50 CNG-powered buses. By late 2010, the System had 158 buses in the fleet with plans of adding 40 to improve its ability to meet federal and state air quality standards.

Grant Amount


Match Funding

The Federal Transit Administration also will provide $1,564,522 for the San Diego project.

Project Participants

The San Diego Metropolitan Transit System, one of California’s largest transit districts, covers 3,240 square miles and serves approximately three million San Diego residents annually by bus and rail. The System’s Project Manager and operation-maintenance staff will provide project oversight and will be responsible for managing the project to completion.

Fuel Solutions and Clean Energy, a third party consultant specializing in CNG compressor installations, will assist with the purchase and installation of the new, high capacity CNG compressors.

Project Benefits

Fuel system output is critical to the transit district›s operations as there is a very limited time to fuel and service the natural gas bus fleet every day. Because CNG has 21 percent fewer emissions than diesel, San Diego›s nearly 200 CNG buses will reduce greenhouse gases by an estimated 3,800 metric tons of CO2 a year, compared to similar diesel-powered vehicles. Natural gas will displace 1.5 million gallons of diesel fuel each year.

Grant Agreement Number: ARV-10-018

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