2. Don’t Scrub When You Can Be Clean

3. A Mobile CNG Pipeline Operational in 6-12 months Low capital expense Relatively short contract duration Phased-in approach to expand with your needs NG Advantage’s trailers delivering CNG 7/30/2015 2

4. What are the Expected Benefits? Fast compliance with EPA boiler regulations, including cost savings on air emissions fees Savings of many millions over building a pipeline extension ROI in one year (depending on what fuel is being replaced) - rather than 20+ years Decreased maintenance costs Future growth without added capital Savings annually by replacing fuel oil with CNG Marketing as environmentally friendlier 7/30/2015 3

5. 23 customers 46 round trips per day Customers receiving between 1-18 loads a day 53 trailers in operation Subsidiary of Clean Energy Fuels (NASDAQ: CLNE) NG Advantage Current Operations 7/30/2015 4

6. 1. Compressor site on pipeline2. Full trailer of carbon fiber containers 3. Customer offload facility 4. Empty trailer returns for refilling How it works 7/30/2015 5

7. View of Compressor Equipment 7/30/20156

8. View Of Filling Bays at Compressor Station 7/30/2015 7

9. DISPENSERS, LOADING & TRANSPORTATION CNG transported in Titan trailers made by Hexagon Lincoln Four carbon fiber cylinders inside 40 foot trailer Total volume = 355,000 scf, equal to 2,650 gal. of #2 fuel oil 7/30/20158

10. 9 Loaded Trailer On The Road

11. Customer Offloading Station 7/30/201510

12. Customer Portal 11 Customer Dashboard

13. Potential Customers for a Virtual Pipeline 7/30/2015 Customer Type 1 Within 200 miles of existing compressor station Burns 500,000+ gallons of fuel oil or 5,000+ tons of coal No additional compressor stations needed Customer Type 2 Greater than 200 miles from existing compressor station Burns 5,000,000+ gallons of fuel oil or 50,000+ tons of coal NG Advantage will build a compressor station nearby Customer Type 3 Small facilities with no NG access NG Advantage will serve a “gas island” 12

14. Responsibilities on the Mobile Pipeline Customer Responsibilities Obtain permitting Convert burner and boiler system to dual-fuel Provide space in yard for Offloading Station Provide turning and parking space for 40 ft. trailers Bring electricity, Internet & gas piping to Offloading Station NG Advantage Responsibilities Assist with engineering and permitting Provide Compressor Station, Offloading Station, trailers & hauling from Compressor Station to customer site Train staff and 1 st responders on properties of CNG and equipment Deliver 24/7 in a timely and safe manner 6/24/2015 13

15. Questions? Dave Lavoie VP of Business Development – 802-760-1167 x 519 7/30/201514