| 
                 
                    Closing price on 3/8/2007
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    53.20 | 
                 
                
                    | High | 
                    53.20 | 
                 
                
                    | Low | 
                    53.20 | 
                     
                
                    | Volume | 
                    2,700 | 
                                 
                
                    | Split-adjusted Price | 
                    4.24 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
STP Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/8/2007
             | 
            
                +4.80 / +9.92%
             |             
            
                53.20
             |           
            
                53.20
             |               
            
                53.20
             |                           
            
                53.20
             | 
            
                53.20
             |                     
            
                4.24
             |                                 
            
                2,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2007
             | 
            
                +4.40 / +10.00%
             |             
            
                48.40
             |           
            
                48.40
             |               
            
                48.40
             |                           
            
                48.40
             | 
            
                48.40
             |                     
            
                3.86
             |                                 
            
                8,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2007
             | 
            
                +3.50 / +8.64%
             |             
            
                42.00
             |           
            
                44.00
             |               
            
                42.00
             |                           
            
                44.00
             | 
            
                44.00
             |                     
            
                3.51
             |                                 
            
                20,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2007
             | 
            
                +1.00 / +2.53%
             |             
            
                39.50
             |           
            
                43.40
             |               
            
                38.50
             |                           
            
                40.50
             | 
            
                40.50
             |                     
            
                3.23
             |                                 
            
                30,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2007
             | 
            
                +1.40 / +3.67%
             |             
            
                39.50
             |           
            
                44.40
             |               
            
                38.50
             |                           
            
                39.50
             | 
            
                39.50
             |                     
            
                3.15
             |                                 
            
                28,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2007
             | 
            
                0.00 / 0.00%
             |             
            
                38.10
             |           
            
                41.90
             |               
            
                38.10
             |                           
            
                38.10
             | 
            
                38.10
             |                     
            
                3.04
             |                                 
            
                40,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2007
             | 
            
                +3.40 / +9.80%
             |             
            
                38.00
             |           
            
                38.10
             |               
            
                38.00
             |                           
            
                38.10
             | 
            
                38.10
             |                     
            
                3.04
             |                                 
            
                22,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2007
             | 
            
                +1.00 / +2.97%
             |             
            
                34.70
             |           
            
                34.70
             |               
            
                34.70
             |                           
            
                34.70
             | 
            
                34.70
             |                     
            
                2.77
             |                                 
            
                19,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/26/2007
             | 
            
                +4.10 / +13.85%
             |             
            
                30.70
             |           
            
                33.70
             |               
            
                29.80
             |                           
            
                33.70
             | 
            
                33.70
             |                     
            
                2.69
             |                                 
            
                36,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2007
             | 
            
                -2.40 / -7.50%
             |             
            
                30.70
             |           
            
                31.20
             |               
            
                29.60
             |                           
            
                29.60
             | 
            
                29.60
             |                     
            
                2.36
             |                                 
            
                13,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2007
             | 
            
                -1.20 / -3.61%
             |             
            
                32.60
             |           
            
                33.40
             |               
            
                32.00
             |                           
            
                32.00
             | 
            
                32.00
             |                     
            
                2.55
             |                                 
            
                6,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2007
             | 
            
                -2.30 / -6.48%
             |             
            
                33.60
             |           
            
                35.00
             |               
            
                33.20
             |                           
            
                33.20
             | 
            
                33.20
             |                     
            
                2.65
             |                                 
            
                7,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/12/2007
             | 
            
                +2.00 / +5.97%
             |             
            
                35.00
             |           
            
                36.70
             |               
            
                35.00
             |                           
            
                35.50
             | 
            
                35.50
             |                     
            
                2.83
             |                                 
            
                15,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/9/2007
             | 
            
                +2.90 / +9.48%
             |             
            
                32.50
             |           
            
                33.50
             |               
            
                32.50
             |                           
            
                33.50
             | 
            
                33.50
             |                     
            
                2.67
             |                                 
            
                25,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2007
             | 
            
                +1.60 / +5.52%
             |             
            
                29.50
             |           
            
                30.60
             |               
            
                29.50
             |                           
            
                30.60
             | 
            
                30.60
             |                     
            
                2.44
             |                                 
            
                14,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2007
             | 
            
                +2.00 / +7.41%
             |             
            
                27.20
             |           
            
                29.00
             |               
            
                26.70
             |                           
            
                29.00
             | 
            
                29.00
             |                     
            
                2.31
             |                                 
            
                49,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2007
             | 
            
                0.00 / 0.00%
             |             
            
                27.20
             |           
            
                28.00
             |               
            
                27.00
             |                           
            
                27.00
             | 
            
                27.00
             |                     
            
                2.15
             |                                 
            
                14,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2007
             | 
            
                +0.10 / +0.37%
             |             
            
                27.10
             |           
            
                29.80
             |               
            
                26.90
             |                           
            
                27.00
             | 
            
                27.00
             |                     
            
                2.15
             |                                 
            
                5,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2007
             | 
            
                +0.90 / +3.46%
             |             
            
                26.90
             |           
            
                28.50
             |               
            
                25.50
             |                           
            
                26.90
             | 
            
                26.90
             |                     
            
                2.14
             |                                 
            
                9,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2007
             | 
            
                +0.50 / +1.96%
             |             
            
                26.10
             |           
            
                28.70
             |               
            
                25.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                2.07
             |                                 
            
                14,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2007
             | 
            
                +0.10 / +0.39%
             |             
            
                26.00
             |           
            
                26.50
             |               
            
                25.50
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                2.03
             |                                 
            
                4,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2007
             | 
            
                +0.40 / +1.60%
             |             
            
                25.40
             |           
            
                26.50
             |               
            
                25.40
             |                           
            
                25.40
             | 
            
                25.40
             |                     
            
                2.02
             |                                 
            
                8,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2007
             | 
            
                -0.50 / -1.96%
             |             
            
                25.00
             |           
            
                25.50
             |               
            
                25.00
             |                           
            
                25.00
             | 
            
                25.00
             |                     
            
                1.99
             |                                 
            
                6,400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/26/2007
             | 
            
                +0.90 / +3.66%
             |             
            
                24.50
             |           
            
                25.50
             |               
            
                24.50
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                2.03
             |                                 
            
                5,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2007
             | 
            
                -4.20 / -14.58%
             |             
            
                22.50
             |           
            
                24.70
             |               
            
                22.50
             |                           
            
                24.60
             | 
            
                24.60
             |                     
            
                1.96
             |                                 
            
                4,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/24/2007
             | 
            
                -0.60 / -2.04%
             |             
            
                29.00
             |           
            
                29.40
             |               
            
                28.80
             |                           
            
                28.80
             | 
            
                28.80
             |                     
            
                1.84
             |                                 
            
                5,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/23/2007
             | 
            
                +0.30 / +1.03%
             |             
            
                29.40
             |           
            
                29.50
             |               
            
                29.20
             |                           
            
                29.40
             | 
            
                29.40
             |                     
            
                1.88
             |                                 
            
                3,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2007
             | 
            
                +0.10 / +0.34%
             |             
            
                29.20
             |           
            
                30.00
             |               
            
                29.10
             |                           
            
                29.10
             | 
            
                29.10
             |                     
            
                1.86
             |                                 
            
                10,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2007
             | 
            
                +0.60 / +2.11%
             |             
            
                29.00
             |           
            
                29.60
             |               
            
                29.00
             |                           
            
                29.00
             | 
            
                29.00
             |                     
            
                1.86
             |                                 
            
                19,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2007
             | 
            
                +0.40 / +1.43%
             |             
            
                28.00
             |           
            
                30.00
             |               
            
                28.00
             |                           
            
                28.40
             | 
            
                28.40
             |                     
            
                1.82
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
         
    
    
 |