CONCENTRATION AND CREDIT RISK

6 Months Ended

Jun. 30, 2011

CONCENTRATION AND CREDIT RISK

CONCENTRATION AND CREDIT RISK

NOTE 3 — CONCENTRATION AND CREDIT RISK

Major Customers. The Company has a multiple year disposal contract with the U.S. Army Corps of Engineers (“USACE”). Revenue under this contract represented 10% and 15% of total revenue for the three months ended June 30, 2011 and 2010, respectively and 10% and 17% for the six months ended June 30, 2011 and 2010, respectively. No other customer represented more than 10% of total revenue for the three and six months ended June 30, 2011 and 2010.

The following customers accounted for more than 10% of total trade receivables as of December 31, 2010. No customers accounted for more than 10% of total trade receivables as of June 30, 2011:

Receivables

	Percent of Receivables
	June 30,		December 31,
Customer	2011		2010
U.S. Army Corps of Engineers	9	%	12	%
Honeywell International, Inc.	8	%	10	%
General Electric, Inc.	0	%	10	%

Credit Risk Concentration. We maintain most of our cash and short-term investments with nationally recognized financial institutions like Wells Fargo National Association (“Wells Fargo”). Substantially all of our balances are uninsured and are not used as collateral for other obligations. Concentrations of credit risk on accounts receivable are believed to be limited due to the number, diversification and character of the obligors and our credit evaluation process.