
    (No. 6163
    Union Oil Company of California, Claimant, vs. State of Illinois, Various Agencies, Respondent.
    
      Opinion filed May 9, 1972.
    
    Union Oil Company of California, Claimant, pro se.
    William J. Scott, Attorney General; Saul R. Wexler, Assistant Attorney General, for Respondent.
   Perlin, C.J.  