0000950129-03-005031 8-K 2 20031021 5 7 20031021 QUANTA SERVICES INC 0001050915 1731 742851603 DE 1231 8-K 34 001-13831 03949072 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 7133506000 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 8-K 1 h09817e8vk.txt QUANTA SERVICES, INC.- OCTOBER 21, 2003 EX-99.1 3 h09817exv99w1.txt PRESS RELEASE DATED OCTOBER 21, 2003