Disclosure of Major Customers (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure of Major Customers

Schedule of revenues by two or more customers who accounted for more than 10% of revenues

For the years ended December 31, 2012, 2011 and 2010, there were four customers who accounted for more than 10% of revenues:

	2012		2011			2010
Sunoco, Inc.	$	34,147,610	$	22,579,414		$	10,951,458
Valero Marketing & Supply Co.	22,321,999		—		(1)	—		(1)
DCP Midstream, LP	15,412,128		31,727,341			23,224,023
Shell Trading (U.S.) Company	11,692,738		—		(1)	—		(1)

(1) Customer represented less than 10% of revenues for the years ended December 31, 2011 and 2010.