| 
                 
                    Closing price on 6/18/2008
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    14.80 | 
                 
                
                    | High | 
                    14.80 | 
                 
                
                    | Low | 
                    14.00 | 
                     
                
                    | Volume | 
                    56,600 | 
                                 
                
                    | Split-adjusted Price | 
                    1.73 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
STP Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/18/2008
             | 
            
                -0.40 / -2.78%
             |             
            
                14.80
             |           
            
                14.80
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.56
             |                     
            
                1.73
             |                                 
            
                56,600
             |            
            
                 
             |                                       
         
    
        
            | 
                6/17/2008
             | 
            
                +0.40 / +2.86%
             |             
            
                14.40
             |           
            
                14.40
             |               
            
                14.40
             |                           
            
                14.40
             | 
            
                14.40
             |                     
            
                1.78
             |                                 
            
                7,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/16/2008
             | 
            
                +0.40 / +2.94%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                1.73
             |                                 
            
                800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2008
             | 
            
                +0.30 / +2.26%
             |             
            
                13.60
             |           
            
                13.60
             |               
            
                13.60
             |                           
            
                13.60
             | 
            
                13.60
             |                     
            
                1.68
             |                                 
            
                1,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/12/2008
             | 
            
                0.00 / 0.00%
             |             
            
                13.30
             |           
            
                13.30
             |               
            
                13.00
             |                           
            
                13.30
             | 
            
                13.27
             |                     
            
                1.65
             |                                 
            
                50,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/11/2008
             | 
            
                +0.30 / +2.31%
             |             
            
                12.70
             |           
            
                13.30
             |               
            
                12.70
             |                           
            
                13.30
             | 
            
                13.02
             |                     
            
                1.65
             |                                 
            
                106,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/10/2008
             | 
            
                -0.30 / -2.26%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                13.00
             |                           
            
                13.00
             | 
            
                13.00
             |                     
            
                1.61
             |                                 
            
                11,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/9/2008
             | 
            
                -0.40 / -2.92%
             |             
            
                13.30
             |           
            
                13.30
             |               
            
                13.30
             |                           
            
                13.30
             | 
            
                13.30
             |                     
            
                1.65
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2008
             | 
            
                -0.40 / -2.84%
             |             
            
                13.70
             |           
            
                13.70
             |               
            
                13.70
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                1.70
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2008
             | 
            
                -0.40 / -2.76%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                14.10
             |                           
            
                14.10
             | 
            
                14.10
             |                     
            
                1.74
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2008
             | 
            
                -0.40 / -2.68%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                14.50
             |                           
            
                14.50
             | 
            
                14.50
             |                     
            
                1.79
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2008
             | 
            
                -0.40 / -2.61%
             |             
            
                14.90
             |           
            
                14.90
             |               
            
                14.90
             |                           
            
                14.90
             | 
            
                14.90
             |                     
            
                1.84
             |                                 
            
                600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/2/2008
             | 
            
                -0.40 / -2.55%
             |             
            
                15.30
             |           
            
                15.30
             |               
            
                15.30
             |                           
            
                15.30
             | 
            
                15.30
             |                     
            
                1.89
             |                                 
            
                600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2008
             | 
            
                -0.40 / -2.48%
             |             
            
                15.70
             |           
            
                15.70
             |               
            
                15.70
             |                           
            
                15.70
             | 
            
                15.70
             |                     
            
                1.94
             |                                 
            
                1,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2008
             | 
            
                -0.40 / -2.42%
             |             
            
                16.10
             |           
            
                16.10
             |               
            
                16.10
             |                           
            
                16.10
             | 
            
                16.10
             |                     
            
                1.99
             |                                 
            
                4,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2008
             | 
            
                -0.50 / -2.94%
             |             
            
                16.50
             |           
            
                16.50
             |               
            
                16.50
             |                           
            
                16.50
             | 
            
                16.50
             |                     
            
                2.04
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2008
             | 
            
                -0.50 / -2.86%
             |             
            
                17.00
             |           
            
                17.00
             |               
            
                17.00
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                2.10
             |                                 
            
                700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/26/2008
             | 
            
                -0.50 / -2.78%
             |             
            
                17.50
             |           
            
                17.50
             |               
            
                17.50
             |                           
            
                17.50
             | 
            
                17.50
             |                     
            
                2.17
             |                                 
            
                2,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2008
             | 
            
                -0.50 / -2.70%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                18.00
             |                           
            
                18.00
             | 
            
                18.00
             |                     
            
                2.23
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2008
             | 
            
                0.00 / 0.00%
             |             
            
                18.50
             |           
            
                18.50
             |               
            
                18.50
             |                           
            
                18.50
             | 
            
                18.50
             |                     
            
                2.29
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2008
             | 
            
                -0.50 / -2.63%
             |             
            
                18.50
             |           
            
                18.50
             |               
            
                18.50
             |                           
            
                18.50
             | 
            
                18.50
             |                     
            
                2.29
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2008
             | 
            
                -0.50 / -2.56%
             |             
            
                19.00
             |           
            
                19.00
             |               
            
                19.00
             |                           
            
                19.00
             | 
            
                19.00
             |                     
            
                2.35
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/19/2008
             | 
            
                -0.60 / -2.99%
             |             
            
                19.50
             |           
            
                19.50
             |               
            
                19.50
             |                           
            
                19.50
             | 
            
                19.50
             |                     
            
                2.41
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2008
             | 
            
                -0.60 / -2.90%
             |             
            
                20.10
             |           
            
                20.10
             |               
            
                20.10
             |                           
            
                20.10
             | 
            
                20.10
             |                     
            
                2.49
             |                                 
            
                8,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2008
             | 
            
                -0.60 / -2.82%
             |             
            
                20.70
             |           
            
                20.70
             |               
            
                20.70
             |                           
            
                20.70
             | 
            
                20.70
             |                     
            
                2.56
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2008
             | 
            
                -0.60 / -2.74%
             |             
            
                21.30
             |           
            
                21.30
             |               
            
                21.30
             |                           
            
                21.30
             | 
            
                21.30
             |                     
            
                2.64
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2008
             | 
            
                -0.60 / -2.67%
             |             
            
                21.90
             |           
            
                21.90
             |               
            
                21.90
             |                           
            
                21.90
             | 
            
                21.90
             |                     
            
                2.71
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/12/2008
             | 
            
                -0.60 / -2.60%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.50
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                2.78
             |                                 
            
                400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2008
             | 
            
                -0.70 / -2.94%
             |             
            
                23.10
             |           
            
                23.10
             |               
            
                23.10
             |                           
            
                23.10
             | 
            
                23.10
             |                     
            
                2.86
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2008
             | 
            
                -0.70 / -2.86%
             |             
            
                23.80
             |           
            
                23.80
             |               
            
                23.80
             |                           
            
                23.80
             | 
            
                23.80
             |                     
            
                2.94
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |