text: **Concentration of Credit Risk**
  
  The Company provides services to commercial, industrial, municipal and residential customers in the 
  United States. Concentrations of credit risk with respect to trade receivables are limited due to the wide 
  variety of customers and markets in which services are provided as well as their dispersion across many 
  geographic areas in the United States. The Company performs ongoing credit evaluations of its customers, but 
  does not require collateral to support customer receivables. The Company establishes an allowance for 
  doubtful accounts based on various factors including the credit risk of speciÑc customers, age of receivables 
  outstanding, historical trends, economic conditions and other information. 
  
  **New Accounting Pronouncement**
  
  On December 16, 2004, the Financial Accounting Standards Board issued Statement of Financial 
  Accounting Standards No. 123 (revised 2004), ""Share-Based Payment'' (""SFAS 123(R)''), which is a 
  revision of Statement of Financial Accounting Standards No. 123, ""Accounting for Stock-Based Compensa- 
  tion'' (""SFAS 123''). SFAS 123(R) supersedes APB Opinion No. 25, ""Accounting for Stock Issued to 
  Employees,'' and amends SFAS 95, ""Statement of Cash Flows.'' Generally, the approach in SFAS 123(R) is 
  similar to the approach described in SFAS 123. However, SFAS 123(R) requires all share-based payments to 
  employees, including grants of employee stock options, to be recognized in the income statement based on 
  their fair values. Pro forma disclosure is no longer an alternative. 