0000899243-01-501898 8-K 2 20011201 5 7 20011203 QUANTA SERVICES INC 0001050915 1731 742851603 DE 1231 8-K 34 001-13831 1804893 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 7133506000 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 8-K 1 d8k.txt CURRENT REPORT EX-4.8 3 dex48.txt AMENDMENT NO. 1 TO RIGHTS AGMT.