| 
                 
                    Closing price on 2/21/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    24.60 | 
                 
                
                    | High | 
                    24.60 | 
                 
                
                    | Low | 
                    24.50 | 
                     
                
                    | Volume | 
                    15,000 | 
                                 
                
                    | Split-adjusted Price | 
                    8.29 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SCL Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/21/2011
             | 
            
                +1.00 / +4.26%
             |             
            
                24.60
             |           
            
                24.60
             |               
            
                24.50
             |                           
            
                24.50
             | 
            
                24.57
             |                     
            
                8.29
             |                                 
            
                15,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2011
             | 
            
                -1.50 / -6.00%
             |             
            
                23.50
             |           
            
                23.50
             |               
            
                23.50
             |                           
            
                23.50
             | 
            
                23.50
             |                     
            
                7.96
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2011
             | 
            
                -0.10 / -0.40%
             |             
            
                25.00
             |           
            
                25.40
             |               
            
                25.00
             |                           
            
                25.00
             | 
            
                25.01
             |                     
            
                8.46
             |                                 
            
                2,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/16/2011
             | 
            
                -0.10 / -0.40%
             |             
            
                25.80
             |           
            
                25.80
             |               
            
                25.10
             |                           
            
                25.10
             | 
            
                25.75
             |                     
            
                8.50
             |                                 
            
                10,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/15/2011
             | 
            
                -1.50 / -5.62%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                24.90
             |                           
            
                25.20
             | 
            
                25.02
             |                     
            
                8.53
             |                                 
            
                6,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                26.70
             |           
            
                26.70
             |               
            
                26.70
             |                           
            
                26.70
             | 
            
                26.70
             |                     
            
                9.04
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/11/2011
             | 
            
                +1.70 / +6.80%
             |             
            
                26.70
             |           
            
                26.70
             |               
            
                26.70
             |                           
            
                26.70
             | 
            
                26.70
             |                     
            
                9.04
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/10/2011
             | 
            
                -0.50 / -1.96%
             |             
            
                25.00
             |           
            
                25.40
             |               
            
                25.00
             |                           
            
                25.00
             | 
            
                25.06
             |                     
            
                8.46
             |                                 
            
                2,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/9/2011
             | 
            
                -1.30 / -4.85%
             |             
            
                27.90
             |           
            
                27.90
             |               
            
                25.50
             |                           
            
                25.50
             | 
            
                26.47
             |                     
            
                8.63
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/8/2011
             | 
            
                +1.10 / +4.28%
             |             
            
                26.80
             |           
            
                26.80
             |               
            
                26.80
             |                           
            
                26.80
             | 
            
                26.80
             |                     
            
                9.07
             |                                 
            
                6,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/28/2011
             | 
            
                0.00 / 0.00%
             |             
            
                24.00
             |           
            
                25.90
             |               
            
                24.00
             |                           
            
                25.70
             | 
            
                25.20
             |                     
            
                8.70
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                1/27/2011
             | 
            
                +0.20 / +0.78%
             |             
            
                24.20
             |           
            
                25.70
             |               
            
                24.20
             |                           
            
                25.70
             | 
            
                25.58
             |                     
            
                8.70
             |                                 
            
                6,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/26/2011
             | 
            
                -0.50 / -1.92%
             |             
            
                25.50
             |           
            
                25.50
             |               
            
                25.50
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                8.63
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2011
             | 
            
                -1.00 / -3.70%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                26.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                8.80
             |                                 
            
                1,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/24/2011
             | 
            
                +0.10 / +0.37%
             |             
            
                27.30
             |           
            
                28.00
             |               
            
                27.00
             |                           
            
                27.00
             | 
            
                27.54
             |                     
            
                9.14
             |                                 
            
                10,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                26.90
             |           
            
                26.90
             |               
            
                26.90
             |                           
            
                26.90
             | 
            
                26.90
             |                     
            
                9.11
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/20/2011
             | 
            
                +1.90 / +7.60%
             |             
            
                26.90
             |           
            
                26.90
             |               
            
                26.90
             |                           
            
                26.90
             | 
            
                26.90
             |                     
            
                9.11
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                27.30
             |           
            
                27.30
             |               
            
                25.00
             |                           
            
                25.00
             | 
            
                25.76
             |                     
            
                8.46
             |                                 
            
                10,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2011
             | 
            
                -0.50 / -1.96%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                25.00
             |                           
            
                25.00
             | 
            
                25.91
             |                     
            
                8.46
             |                                 
            
                12,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2011
             | 
            
                -1.30 / -4.85%
             |             
            
                26.20
             |           
            
                26.40
             |               
            
                25.50
             |                           
            
                25.50
             | 
            
                26.19
             |                     
            
                8.63
             |                                 
            
                9,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/14/2011
             | 
            
                +0.80 / +3.08%
             |             
            
                26.70
             |           
            
                26.80
             |               
            
                26.70
             |                           
            
                26.80
             | 
            
                26.77
             |                     
            
                9.07
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/13/2011
             | 
            
                0.00 / 0.00%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                26.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                8.80
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/12/2011
             | 
            
                0.00 / 0.00%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                26.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                8.80
             |                                 
            
                5,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2011
             | 
            
                +0.20 / +0.78%
             |             
            
                26.00
             |           
            
                26.10
             |               
            
                25.60
             |                           
            
                26.00
             | 
            
                25.89
             |                     
            
                8.80
             |                                 
            
                26,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/10/2011
             | 
            
                -0.30 / -1.15%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                25.80
             |                           
            
                25.80
             | 
            
                25.87
             |                     
            
                8.73
             |                                 
            
                13,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/7/2011
             | 
            
                -0.20 / -0.76%
             |             
            
                26.00
             |           
            
                26.50
             |               
            
                26.00
             |                           
            
                26.10
             | 
            
                26.23
             |                     
            
                8.84
             |                                 
            
                8,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/6/2011
             | 
            
                -0.10 / -0.38%
             |             
            
                26.00
             |           
            
                26.40
             |               
            
                26.00
             |                           
            
                26.30
             | 
            
                26.26
             |                     
            
                8.90
             |                                 
            
                8,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/5/2011
             | 
            
                +0.10 / +0.38%
             |             
            
                26.00
             |           
            
                26.40
             |               
            
                26.00
             |                           
            
                26.40
             | 
            
                26.21
             |                     
            
                8.94
             |                                 
            
                17,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/4/2011
             | 
            
                -0.60 / -2.23%
             |             
            
                27.10
             |           
            
                27.10
             |               
            
                26.30
             |                           
            
                26.30
             | 
            
                26.55
             |                     
            
                8.90
             |                                 
            
                12,400
             |            
            
                 
             |                                       
         
    
        
            | 
                12/31/2010
             | 
            
                +0.50 / +1.89%
             |             
            
                26.70
             |           
            
                26.90
             |               
            
                26.00
             |                           
            
                26.90
             | 
            
                26.24
             |                     
            
                9.11
             |                                 
            
                95,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |