| 
                 
                    Closing price on 3/26/2008
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    25.50 | 
                 
                
                    | High | 
                    30.50 | 
                 
                
                    | Low | 
                    25.20 | 
                     
                
                    | Volume | 
                    128,600 | 
                                 
                
                    | Split-adjusted Price | 
                    3.61 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
STP Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/26/2008
             | 
            
                +1.40 / +5.04%
             |             
            
                25.50
             |           
            
                30.50
             |               
            
                25.20
             |                           
            
                29.20
             | 
            
                29.17
             |                     
            
                3.61
             |                                 
            
                128,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2008
             | 
            
                -2.60 / -8.55%
             |             
            
                28.10
             |           
            
                28.10
             |               
            
                27.80
             |                           
            
                27.80
             | 
            
                27.80
             |                     
            
                3.44
             |                                 
            
                79,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/24/2008
             | 
            
                -3.10 / -9.25%
             |             
            
                33.70
             |           
            
                33.70
             |               
            
                30.40
             |                           
            
                30.40
             | 
            
                30.80
             |                     
            
                3.76
             |                                 
            
                63,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2008
             | 
            
                -1.50 / -4.29%
             |             
            
                36.00
             |           
            
                36.00
             |               
            
                33.00
             |                           
            
                33.50
             | 
            
                33.71
             |                     
            
                4.14
             |                                 
            
                72,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2008
             | 
            
                -1.40 / -3.85%
             |             
            
                38.00
             |           
            
                38.00
             |               
            
                35.00
             |                           
            
                35.00
             | 
            
                36.64
             |                     
            
                4.33
             |                                 
            
                80,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2008
             | 
            
                +0.10 / +0.28%
             |             
            
                37.00
             |           
            
                40.00
             |               
            
                34.00
             |                           
            
                36.40
             | 
            
                37.16
             |                     
            
                4.50
             |                                 
            
                82,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2008
             | 
            
                -3.60 / -9.02%
             |             
            
                36.50
             |           
            
                37.00
             |               
            
                36.30
             |                           
            
                36.30
             | 
            
                36.38
             |                     
            
                4.49
             |                                 
            
                125,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2008
             | 
            
                -4.60 / -10.34%
             |             
            
                43.00
             |           
            
                43.00
             |               
            
                39.90
             |                           
            
                39.90
             | 
            
                40.31
             |                     
            
                4.94
             |                                 
            
                98,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2008
             | 
            
                -1.90 / -4.09%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                43.00
             |                           
            
                44.50
             | 
            
                44.29
             |                     
            
                5.51
             |                                 
            
                71,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2008
             | 
            
                +0.40 / +0.87%
             |             
            
                48.50
             |           
            
                48.80
             |               
            
                43.90
             |                           
            
                46.40
             | 
            
                45.42
             |                     
            
                5.64
             |                                 
            
                50,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2008
             | 
            
                +4.10 / +9.79%
             |             
            
                42.00
             |           
            
                46.50
             |               
            
                41.00
             |                           
            
                46.00
             | 
            
                44.42
             |                     
            
                5.59
             |                                 
            
                100,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2008
             | 
            
                -2.60 / -5.84%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                41.90
             |                           
            
                41.90
             | 
            
                42.25
             |                     
            
                5.09
             |                                 
            
                106,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/10/2008
             | 
            
                +1.30 / +3.01%
             |             
            
                47.50
             |           
            
                47.50
             |               
            
                43.00
             |                           
            
                44.50
             | 
            
                46.53
             |                     
            
                5.41
             |                                 
            
                193,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2008
             | 
            
                +3.90 / +9.92%
             |             
            
                43.20
             |           
            
                43.20
             |               
            
                43.20
             |                           
            
                43.20
             | 
            
                43.20
             |                     
            
                5.25
             |                                 
            
                10,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2008
             | 
            
                +2.90 / +7.97%
             |             
            
                39.30
             |           
            
                39.30
             |               
            
                38.80
             |                           
            
                39.30
             | 
            
                39.29
             |                     
            
                4.78
             |                                 
            
                19,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2008
             | 
            
                -3.00 / -7.61%
             |             
            
                37.00
             |           
            
                38.50
             |               
            
                35.50
             |                           
            
                36.40
             | 
            
                35.77
             |                     
            
                4.42
             |                                 
            
                125,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2008
             | 
            
                -3.50 / -8.16%
             |             
            
                40.00
             |           
            
                40.00
             |               
            
                39.40
             |                           
            
                39.40
             | 
            
                39.42
             |                     
            
                4.79
             |                                 
            
                26,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/3/2008
             | 
            
                -4.70 / -9.87%
             |             
            
                48.50
             |           
            
                49.50
             |               
            
                42.90
             |                           
            
                42.90
             | 
            
                43.68
             |                     
            
                5.21
             |                                 
            
                87,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/29/2008
             | 
            
                -2.80 / -5.56%
             |             
            
                49.00
             |           
            
                50.00
             |               
            
                46.00
             |                           
            
                47.60
             | 
            
                47.56
             |                     
            
                5.79
             |                                 
            
                63,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2008
             | 
            
                +0.20 / +0.40%
             |             
            
                50.00
             |           
            
                52.00
             |               
            
                48.50
             |                           
            
                50.40
             | 
            
                50.01
             |                     
            
                6.13
             |                                 
            
                55,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2008
             | 
            
                +0.30 / +0.60%
             |             
            
                51.00
             |           
            
                54.80
             |               
            
                48.50
             |                           
            
                50.20
             | 
            
                50.99
             |                     
            
                6.10
             |                                 
            
                91,400
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2008
             | 
            
                -5.80 / -10.41%
             |             
            
                52.80
             |           
            
                60.00
             |               
            
                49.90
             |                           
            
                49.90
             | 
            
                52.75
             |                     
            
                6.07
             |                                 
            
                83,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2008
             | 
            
                +4.70 / +9.22%
             |             
            
                51.50
             |           
            
                55.70
             |               
            
                50.70
             |                           
            
                55.70
             | 
            
                55.43
             |                     
            
                6.77
             |                                 
            
                73,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2008
             | 
            
                -3.50 / -6.42%
             |             
            
                50.60
             |           
            
                60.00
             |               
            
                49.20
             |                           
            
                51.00
             | 
            
                50.69
             |                     
            
                6.20
             |                                 
            
                142,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2008
             | 
            
                -4.50 / -7.63%
             |             
            
                57.50
             |           
            
                57.50
             |               
            
                54.50
             |                           
            
                54.50
             | 
            
                54.63
             |                     
            
                6.62
             |                                 
            
                37,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2008
             | 
            
                -5.00 / -7.81%
             |             
            
                65.00
             |           
            
                66.00
             |               
            
                58.60
             |                           
            
                59.00
             | 
            
                60.52
             |                     
            
                7.17
             |                                 
            
                69,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/19/2008
             | 
            
                -2.50 / -3.76%
             |             
            
                65.00
             |           
            
                70.00
             |               
            
                60.00
             |                           
            
                64.00
             | 
            
                65.11
             |                     
            
                7.78
             |                                 
            
                54,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2008
             | 
            
                -3.90 / -5.54%
             |             
            
                68.00
             |           
            
                68.00
             |               
            
                63.90
             |                           
            
                66.50
             | 
            
                65.60
             |                     
            
                8.08
             |                                 
            
                91,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/15/2008
             | 
            
                -2.60 / -3.56%
             |             
            
                72.00
             |           
            
                72.10
             |               
            
                70.10
             |                           
            
                70.40
             | 
            
                70.91
             |                     
            
                8.56
             |                                 
            
                55,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2008
             | 
            
                -0.50 / -0.68%
             |             
            
                72.00
             |           
            
                76.00
             |               
            
                72.00
             |                           
            
                73.00
             | 
            
                73.64
             |                     
            
                8.87
             |                                 
            
                75,000
             |  
            
                 
             |                                                              
             
    
         
    
    
 |