Dept. of Trans.       FINAL   Serial No.  Contract No.                                  
                                          07-355-06-01  06-0G2904                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                 100%         100%                             
06-MAD-41-26.7/ .0                    Federal Project:                                  
06-MAD-41-40.9/44.8                                     NONE                            
                                                                                        
                                                                                        
Progress payment No. 04            Payment period ending: 09-26-07                      
INSITUFORM TECHNOLOGIES INC                                                             
P O BOX 1026                                                                            
CHESTERFIELD MO 63006                                                                   
                                                                                        
                                                                                        
Escrow No.  00000                                                                       
                                    Total Estimate   This Estimate                      
1. Contract Itms Without Mobil.         262,746.80            0.00                      
2.a. Extra Work                          10,521.82        7,371.82                      
  b. Adjustment Comp.                     5,978.03        5,978.03                      
3. Materials on Hand                                                                    
4. Earned Subject to Retention          279,246.65       13,349.85                      
5. Mobilization                          20,000.00            0.00                      
6. Total Work Completed      299,246.65                                                 
7. Deductions                                 0.00        1,000.00                      
8. a.Contract Retentions                -13,118.44            0.00                      
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.          13,118.44            0.00                      
9. Total pay to Contractor              299,246.65       14,349.85                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow             0.00                                                  
12. Net Pymt. this Estimate                              14,349.85