
    (No. 6551
    Sun Oil Company of Pennsylvania, Claimant, vs. State of Illinois, Department of Transportation, Respondent.
    
      
      Opinion filed June 13, 1972.
    
    Sun Oil Company of Pennsylvania, Claimant, pro se.
    William J. Scott, Attorney General; William E. Webber, Assistant Attorney General, for Respondent.
   Perlin, C.J.  