0000950129-04-003077 10-Q 4 20040331 20040510 QUANTA SERVICES INC 0001050915 1731 742851603 DE 1231 10-Q 34 001-13831 04793027 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 7133506000 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 10-Q 1 h15138e10vq.htm QUANTA SERVICES, INC.- PERIOD ENDED MARCH 31, 2004 EX-31.1 2 h15138exv31w1.htm CERTIFICATION OF CEO PURSUANT TO SECTION 302 EX-31.2 3 h15138exv31w2.htm CERTIFICATION OF CFO PURSUANT TO SECTION 302 EX-32.1 4 h15138exv32w1.htm CERTIFICATION OF CEO & CFO PURSUANT TO SECTION 906