0000950129-03-004896 8-K 3 20030930 5 7 20031003 QUANTA SERVICES INC 0001050915 1731 742851603 DE 1231 8-K 34 001-13831 03925958 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 7133506000 1360 POST OAK BLVD SUITE 2100 HOUSTON TX 77056 8-K 1 h09378e8vk.txt QUANTA SERVICES, INC.- SEPTEMBER 30, 2003 EX-4.1 3 h09378exv4w1.txt AMENDMENT NO.3 TO NOTE PURCHASE AGREEMENT EX-10.1 4 h09378exv10w1.txt 10TH AMENDMENT TO CONSENT TO SECURED CREDIT AGMT