0000950129-01-504086 10-Q 1 20010930 20011114 QUANTA SERVICES INC 0001050915 1731 742851603 DE 1231 10-Q 34 001-13831 1789453 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 7133506000 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 10-Q 1 h90950e10-q.txt QUANTA SERVICES, INC. - 9/30/2001