Dept. of Trans.       PROGRESS   Serial No.  Contract No.                               
                                          06-230-07-27  04-449604                       
                PROGRESS PAYMENT VOUCHER  %complete:   %time:                           
Location:                                  13%          18%                             
04-SOL-80-R9.8/ .0                    Federal Project:                                  
                                     ACIM-080-2(348)                                    
                                                                                        
                                                                                        
Progress payment No. 04            Payment period ending: 08-20-06                      
DRILL TECH DRILLING AND                                                                 
SHORING INC                                                                             
2200 WYMORE WAY                                                                         
ANTIOCH CA 94509                                                                        
                                                                                        
Escrow No.  00000                                                                       
                                    Total Estimate   This Estimate                      
1. Contract Itms Without Mobil.         298,162.50      160,850.00                      
2.a. Extra Work                         116,923.34      116,923.34                      
  b. Adjustment Comp.                    31,947.00       31,947.00                      
3. Materials on Hand                     45,188.35      -51,291.48                      
4. Earned Subject to Retention          492,221.19      258,428.86                      
5. Mobilization                         280,000.00      280,000.00                      
6. Total Work Completed      727,032.84                                                 
7. Deductions                                                                           
8. a.Contract Retentions                                                                
   b. Unsatisfactory Prog.                                                              
   c. Reduction after 95% Comp.                                                         
9. Total pay to Contractor              772,221.19      538,428.86                      
10. Reduction Amt to Escrow                                                             
11. Payment to Escrow             0.00                                                  
12. Net Pymt. this Estimate                             538,428.86