Exhibit 10(52) Description of TARSAP Vesting Adjustment Gary W. Loveman Date: November 11, 1999 The Human Resources Committee of the Board of Directors modified the TARSAP vesting schedule of Gary W. Loveman as follows: Current Performance Performance Vesting Vesting As Modified Plan Year (cumulative) (cumulative) Vest Date - --------- -------------------- ------------------------ --------- 1999 43.4% 50% 50.0% (target) 60% (target) 3/1/00 56.8% 70% 2000 73.4% 80% 80.0% (target) 90% (target) 3/1/00 86.8 % 100%