EXHIBIT 10.49 ================================================================================ QUANTA SERVICES, INC. FIRST SUPPLEMENT TO NOTE PURCHASE AGREEMENT Dated as of September 1, 2000 Re: $30,000,000 8.01% Series 2000-B Senior Secured Notes, Tranche 1, Due September 1, 2005 and $5,000,000 8.06% Series 2000-B Senior Secured Notes, Tranche 2, Due September 1, 2006 and $25,000,000 8.29% Series 2000-B Senior Secured Notes, Tranche 3, Due September 1, 2010 ================================================================================ QUANTA SERVICES, INC. 1360 Post Oak Boulevard, Suite 2100 Houston, Texas 77056-3023 Dated as of September 1, 2000 To the Purchasers named in Schedule A hereto Ladies and Gentlemen: This First Supplement to Note Purchase Agreement (the "Supplement") is between QUANTA SERVICES, INC., a Delaware corporation (the "Company"), and the institutional investors named on Schedule A attached hereto (the "Purchasers"). Reference is hereby made to that certain Note Purchase Agreement dated as of March 1, 2000 (the "Note Purchase Agreement") between the Company and the purchasers listed on Schedule A thereto. All capitalized terms not otherwise defined herein shall have the same meaning as specified in the Note Purchase Agreement. Reference is further made to Section 4.18 of the Note Purchase Agreement which requires that, prior to the delivery of any Additional Notes, the Company and each Additional Purchaser shall execute and deliver a Supplement. The Company hereby agrees with the Purchasers as follows: 1. The Company has authorized the issue and sale of $30,000,000 aggregate principal amount of its 8.01% Series 2000-B Senior Secured Notes, Tranche 1, due September 1, 2005 (the "Tranche 1 Notes"), $5,000,000 aggregate principal amount of its 8.06% Series 2000-B Senior Secured Notes, Tranche 2, due September 1, 2006 (the "Tranche 2 Notes") and $25,000,000 aggregate principal amount of its 8.29% Series 2000-B Senior Secured Notes, Tranche 3, due September 1, 2010 (the "Tranche 3 Notes" and together with the Tranche 1 Notes and the Tranche 2 Notes, the "Series 2000-B Notes"). The Series 2000-B Notes, together with the Series 2000-A Notes initially issued pursuant to the Note Purchase Agreement and each series of Additional Notes which may from time to time hereafter be issued pursuant to the provisions of Section 2.4 of the Note Purchase Agreement, are collectively referred to as the "Notes" (such term shall also include any such notes issued in substitution therefor pursuant to Section 13 of the Note Purchase Agreement). The Tranche 1 Notes, the Tranche 2 Notes and the Tranche 3 Notes shall be substantially in the forms set out in Exhibit 1, Exhibit 2, and Exhibit 3 hereto, respectively, with such changes therefrom, if any, as may be approved by the Purchasers and the Company. 2. Subject to the terms and conditions hereof and as set forth in the Note Purchase Agreement and on the basis of the representations and warranties hereinafter set forth, the Company agrees to issue and sell to each Purchaser, and each Purchaser agrees to purchase from the Company, Series 2000-B Notes in the principal amount set forth opposite such Purchaser's name on Schedule A hereto at a price of 100% of the principal amount thereof on the closing date hereinafter mentioned. 3. The sale and purchase of the Series 2000-B Notes to be purchased by each Purchaser shall occur at the offices of Chapman and Cutler, 111 West Monroe Street, Chicago, Illinois 60603, at 10:00 A.M. Chicago time, at a closing (the "Closing") on September 11, 2000 or on such other Business Day thereafter on or prior to September 15, 2000 as may be agreed upon by the Company and the Purchasers. At the Closing, the Company will deliver to each Purchaser the Series 2000-B Notes of the tranche to be purchased by such Purchaser in the form of a single Series 2000-B Note of such tranche (or such greater number of Series 2000-B Notes of such tranche in denominations of at least $100, 000 as such Purchaser may request) dated the date of the Closing and registered in such Purchaser's name (or in the name of such Purchaser's nominee), against delivery by such Purchaser to the Company or its order of immediately available funds in the amount of the purchase price therefor by wire transfer of immediately available funds for the account of the Company to account number 001390029677, at Bank of America, Dallas, Texas, ABA Number 111000025. If, at the Closing, the Company shall fail to tender such Series 2000-B Notes to any Purchaser as provided above in this Section 3, or any of the conditions specified in Section 4 shall not have been fulfilled to any Purchaser's satisfaction, such Purchaser shall, at such Purchaser's election, be relieved of all further obligations under this Agreement, without thereby waiving any rights such Purchaser may have by reason of such failure or such nonfulfillment. 4. The obligation of each Purchaser to purchase and pay for the Series 2000-B Notes to be sold to such Purchaser at the Closing is subject to the fulfillment to such Purchaser's satisfaction, prior to the Closing, of the conditions set forth in Section 4 of the Note Purchase Agreement with respect to the Series 2000-B Notes to be purchased at the Closing, and to the following additional conditions: (a) Except as supplemented, amended or superceded by the representations and warranties set forth in Exhibit A hereto, each of the representations and warranties of the Company set forth in Section 5 of the Note Purchase Agreement shall be correct as of the date of Closing and the Company shall have delivered to each Purchaser an Officer's Certificate, dated the date of the Closing certifying that such condition has been fulfilled. (b) Contemporaneously with the Closing, the Company shall sell to each Purchaser, and each Purchaser shall purchase, the Series 2000-B Notes of the tranche to be purchased by such Purchaser at the Closing as specified in Schedule A. 2 (c) The Guaranty Ratification substantially in the form of Exhibit B attached hereto shall have been executed and delivered by the Guarantors and shall be in full force and effect and each Purchaser shall have received a true, correct and complete copy thereof. (d) The Guaranty Joinder Agreement substantially in the form of Exhibit C attached hereto shall have been executed and delivered by the Additional Guarantors (as defined therein) and shall be in full force and effect and each Purchaser shall have received a true, correct and complete copy thereof. (e) The Acknowledgment to Intercreditor Agreement substantially in the form of Exhibit D attached hereto shall have been executed and delivered by the respective parties thereto and shall be in full force and effect and each Purchaser shall have received a true, correct and complete copy thereof. 5. (a) Required Payments. (i) Tranche 1 Notes. On September 1, 2005 the entire principal amount of the Tranche 1 Notes shall become due and payable. (ii) Tranche 2 Notes. On September 1, 2006 the entire principal amount of the Tranche 2 Notes shall become due and payable. (iii) Tranche 3 Notes. On September 1, 2010 the entire principal amount of the Tranche 3 Notes shall become due and payable. (b) Optional Prepayments. The Series 2000-B Notes are subject to prepayment at the option of the Company in the manner and with the effect set forth in Section 8.2 of the Note Purchase Agreement. (c) Allocation of Partial Prepayments. In the case of each partial prepayment of the Series 2000-B Notes pursuant to the provisions of Section 8.2 of the Note Purchase Agreement, the principal amount of the Series 2000-B Notes to be prepaid shall be allocated among all of the Notes of such Series at the time outstanding in proportion, as nearly as practicable, to the respective unpaid principal amounts thereof. (d) Make-Whole Amount for Series 2000-B Notes. The term "Make-Whole Amount" means, with respect to a Series 2000-B Note of any tranche, an amount equal to the excess, if any, of the Discounted Value of the Remaining Scheduled Payments with respect to the Called Principal of the Series 2000-B Notes of such tranche over the amount of such Called Principal, provided that the Make-Whole Amount may in no event be less than zero. For the purposes of determining the Make-Whole Amount, the following terms have the following meanings: "Called Principal" means, with respect to a Series 2000-B Note of any tranche, the principal of the Series 2000-B Notes of such tranche that is to be 3 prepaid pursuant to Section 8.2 or has become or is declared to be immediately due and payable pursuant to Section 12 1, as the context requires. "Discounted Value" means, with respect to the Called Principal of a Series 2000-B Note of any tranche, the amount obtained by discounting all Remaining Scheduled Payments with respect to such Called Principal from their respective scheduled due dates to the Settlement Date with respect to such Called Principal, in accordance with accepted financial practice and at a discount factor (applied on the same periodic basis as that on which interest on the Series 2000-B Notes of such tranche is payable) equal to the Reinvestment Yield with respect to such Called Principal. "Reinvestment Yield" means, with respect to the Called Principal of a Series 2000-B Note of any tranche, 0.50% plus the yield to maturity implied by (i) the yields reported, as of 10:00 A.M. (New York City time) on the second Business Day preceding the Settlement Date with respect to such Called Principal, on the display designated as "PX-1" on the Bloomberg Financial Market Screen (or such other display as may replace "PX-1" on the Bloomberg Financial Market Screen) for actively traded U.S. Treasury securities having a maturity equal to the Remaining Average Life of such Called Principal as of such Settlement Date, or (ii) if such yields are not reported as of such time or the yields reported as of such time are not ascertainable, the Treasury Constant Maturity Series Yields reported, for the latest day for which such yields have been so reported as of the second Business Day preceding the Settlement Date with respect to such Called Principal, in Federal Reserve Statistical Release H.15 (519) (or any comparable successor publication) for actively traded U.S. Treasury securities having a constant maturity equal to the Remaining Average Life of such Called Principal as of such Settlement Date. Such implied yield will be determined, if necessary, by (a) converting U.S. Treasury bill quotations to bond-equivalent yields in accordance with accepted financial practice and (b) interpolating linearly on a straight line basis between (1) the actively traded U.S. Treasury security with the maturity closest to and greater than the Remaining Average Life and (2) the actively traded U.S. Treasury security with the maturity closest to and less than the Remaining Average Life. "Remaining Average Life" means, with respect to any Called Principal, the number of years (calculated to the nearest one-twelfth year) obtained by dividing (i) such Called Principal into (ii) the sum of the products obtained by multiplying (a) the principal component of each Remaining Scheduled Payment with respect to such Called Principal by (b) the number of years (calculated to the nearest one-twelfth year) that will elapse between the Settlement Date with respect to such Called Principal and the scheduled due date of such Remaining Scheduled Payment. "Remaining Scheduled Payments" means, with respect to the Called Principal of a Series 2000-B Note of any tranche, all payments of such Called 4 Principal and interest thereon that would be due after the Settlement Date with respect to such Called Principal if no payment of such Called Principal were made prior to its scheduled due date, provided that if such Settlement Date is not a date on which interest payments are due to be made under the terms of the Series 2000-B Notes of such tranche, then the amount of the next succeeding scheduled interest payment will be reduced by the amount of interest accrued to such Settlement Date and required to be paid on such Settlement Date pursuant to Section 8.2 or 12.1. "Settlement Date" means, with respect to the Called Principal of a Series 2000-B Note of any tranche, the date on which such Called Principal is to be prepaid pursuant to Section 8.2 or has become or is declared to be immediately due and payable pursuant to Section 12. 1, as the context requires. 6. Each Purchaser represents and warrants that the representations and warranties set forth in Section 6 of the Note Purchase Agreement are true and correct on the date hereof with respect to the purchase of the Series 2000-B Notes to be purchased by such Purchaser. 7 The Company and each Purchaser agree to be bound by and comply with the terms and provisions of the Note Purchase Agreement as fully and completely as if such Purchaser were an original signatory to the Note Purchase Agreement. 5 The execution hereof shall constitute a contract between the Company and the Purchasers for the uses and purposes hereinabove set forth, and this agreement may be executed in any number of counterparts, each executed counterpart constituting an original but all together only one agreement. QUANTA SERVICES, INC. By /s/ James H. Haddox ----------------------------- Name: James H. Haddox Title: Chief Financial Officer Accepted as of September 1, 2000 ALLSTATE LIFE INSURANCE COMPANY By /s/ JERRY D. ZINKULA ----------------------------- JERRY D. ZINKULA By /s/ DAVID A. WALSH ----------------------------- Authorized Signatories DAVID A. WALSH Accepted as of September 1, 2000 AMERICAN HERITAGE LIFE INSURANCE COMPANY By /s/ JERRY D. ZINKULA ------------------------------------- JERRY D. ZINKULA By /s/ DAVID A. WALSH ------------------------------------- Authorized Signatories DAVID A. WALSH Accepted as of September 1, 2000 THE TRAVELERS INSURANCE COMPANY, for itself and two of its separate accounts By /s/ TERESA M. TORREY -------------------------------------- Name: TERESA M. TORREY Title: SECOND VICE PRESIDENT Accepted as of September 1, 2000 LUTHERAN BROTHERHOOD, a Minnesota corporation By /s/ MARK O. SWENSON -------------------------------------- Name: MARK O. SWENSON Title: Vice President Accepted as of September 1, 2000 MODERN WOODMEN OF AMERICA By /s/ Clyde C. Schoeck ----------------------------------- Name: Clyde C. Schoeck Title: President Accepted as of September 1, 2000 UNUM LIFE INSURANCE COMPANY OF AMERICA By: Provident Investment Management, L.L.C. Its: Agent By. /s/ Ben S. Miller ---------------------------------------- Name: Ben S. Miller Title: Vice President Accepted as of September 1, 2000 PHOENIX HOME LIFE MUTUAL INSURANCE COMPANY By /s/ CHRISTOPHER WILKOS --------------------------------------- Name: CHRISTOPHER WILKOS Title: Vice President, Corporate Portfolio Management PHOENIX HOME LIFE INFORMATION RELATING TO PURCHASERS PRINCIPAL AMOUNT TRANCHE OF NOTES TO BE NAME OF PURCHASERS OF NOTES PURCHASED ALLSTATE LIFE INSURANCE COMPANY Tranche 1 $10,000,000 Private Placements Department 3075 Sanders Road, STE G3A Northbrook, Illinois 60062-7127 Telephone Number: (847) 402-8922 Telecopier Number: (847) 402-3092 Payments All payments on or in respect of the Notes to be made by Fedwire transfer of immediately available funds (identifying each payment with name of the Issuer (and the Credit, if any), the Private Placement Number preceded by "DPP" and the payment as principal, interest or premium) in the exact format as follows: BBK = Harris Trust and Savings Bank ABA #071000288 BNF = Allstate Life Insurance Company Collection Account #168-117-0 ORG = Quanta Services, Inc. OBI = DPP - PPN 74762E B* 2 Payment Due Date (MM/DD/YY)-- P__________(enter "P" and the amount of principal being remitted, for example, P5000000.00)-- I__________(enter "I" and the amount of interest being remitted, for example, 1225000.00) Notices All notices of scheduled payments and written confirmation of each such payment, to be addressed: Allstate Insurance Company Investment Operations--Private Placements 3075 Sanders Road, STE G4A Northbrook, Illinois 60062-7127 Telephone: (847) 402-2769 Telecopy: (847) 326-5040 All financial reports, compliance certificates and all other written communications, including notice of prepayments to be addressed as first provided above SCHEDULE A (to Supplement) Name of Nominee in which Notes are to be issued: None Taxpayer I.D. Number: 36-2554642 A-2 PRINCIPAL AMOUNT TRANCHE OF NOTES TO BE NAME OF PURCHASERS OF NOTES PURCHASED AMERICAN HERITAGE LIFE INSURANCE Tranche 1 $4,500,000 COMPANY c/o Allstate Life Insurance Company Private Placements Department 3075 Sanders Road, STE G3A Northbrook, Illinois 60062-7127 Telephone Number: (847) 402-8922 Telecopier Number: (847) 402-3092 Payments All payments on or in respect of the Notes to be made by Fedwire transfer of immediately available funds, identifying the name of the Issuer, the Private Placement Number preceded by "DPP" and the payment as principal, interest or premium, in the format as follows: BBK = Harris Trust and Savings Bank ABA #071000288 BNF = American Heritage Life Insurance Company Collection Account #172-504-3 ORG = Quanta Services, Inc. OBI = DPP - PPN 74762E B* 2 Payment Due Date (MM/DD/YY)-- P_________(Enter "P" and the amount of principal being remitted, for example, P5000000.00) I__________(enter "I" and the amount of interest being remitted, for example, 1225000.00) Notices All notices of scheduled payments and written confirmation of each such payment, to be addressed: Allstate Insurance Company Investment Operations--Private Placements 3075 Sanders Road, STE G4A Northbrook, Illinois 60062-7127 Telephone: (847) 402-2769 Telecopy: (847) 326-5040 All financial reports, compliance certificates and all other written communications, including notice of prepayments to be addressed as first provided above. Name of Nominee in which Notes are to be issued: None Taxpayer I.D. Number: 59-0781901 A-3 PRINCIPAL AMOUNT TRANCHE OF NOTES TO BE NAME OF PURCHASERS OF NOTES PURCHASED THE TRAVELERS INSURANCE COMPANY Tranche 1 $4,500,000 One Tower Square Hartford, Connecticut 06183-2030 Attention: Investment Group--Private Placements 9PB Telefacsimile: (860) 954-5243 Payments All payments on or in respect of the Notes to be by bank wire transfer of Federal or other immediately available funds (identifying each payment as "Quanta Services, Inc., 8.01% Series 2000-B Senior Secured Notes due September 1, 2005, PPN 74762E B* 2, principal, premium or interest") to: The Travelers Insurance Company - Consolidated Private Placement Account No. 910-2-587434 The Chase Manhattan Bank, N.A. One Chase Manhattan Plaza New York, New York 10081 ABA #021000021 Notices All notices and communications to be addressed as first provided above, except notices with respect to payment and written confirmation of each such payment, to be addressed: The Travelers Insurance Company One Tower Square Hartford, Connecticut 06183-2030 Attention: Investment Group--Cashier 10PB Telefacsimile: (860) 277-7941 Name of Nominee in which Notes are to be issued: TRAL & CO Taxpayer I.D. Number: 06-0566090 A-4 PRINCIPAL AMOUNT TRANCHE OF NOTES TO BE NAME OF PURCHASERS OF NOTES PURCHASED THE TRAVELERS INSURANCE COMPANY, Tranche 2 $4,000,000 FOR ONE OF ITS SEPARATE ACCOUNTS One Tower Square Hartford, Connecticut 06183-2030 Attention: Investment Group--Private Placements 9PB Telefacsimile: (860) 954-5243 Payments All payments on or in respect of the Notes to be by bank wire transfer of Federal or other immediately available funds (identifying each payment as "Quanta Services, Inc., 8.06% Series 2000-B Senior Secured Notes due September 1, 2006, PPN 74762E B@ 0, principal, premium or interest") to: The Travelers Insurance Company - Separate Account MGA Account No. 910-2-739365 The Chase Manhattan Bank, N.A. One Chase Manhattan Plaza New York, New York 10081 ABA #021000021 Notices All notices and communications to be addressed as first provided above, except notices with respect to payment and written confirmation of each such payment, to be addressed: The Travelers Insurance Company One Tower Square Hartford, Connecticut 06183-2030 Attention: Investment Group--Cashier 10PB Telefacsimile: (860)277-7941 Name of Nominee in which Notes are to be issued: NONE Taxpayer I.D. Number: 06-0566090 A-5 PRINCIPAL AMOUNT TRANCHE OF NOTES TO BE NAME OF PURCHASERS OF NOTES PURCHASED THE TRAVELERS INSURANCE COMPANY Tranche 2 $1,000,000 FOR ONE OF ITS SEPARATE ACCOUNTS One Tower Square Hartford, Connecticut 06183-2030 Attention: Investment Group--Private Placements 9PB Telefacsimile: (860) 954-5243 Payments All payments on or in respect of the Notes to be by bank wire transfer of Federal or other immediately available funds (identifying each payment as "Quanta Services, Inc., 8.06% Series 2000-B Senior Secured Notes due September 1, 2006, PPN 74762E B@ 0, principal, premium or interest") to: The Travelers Insurance Company - Separate Account SMGA Account No. 910-2-720464 The Chase Manhattan Bank, N.A. One Chase Manhattan Plaza New York, New York 10081 ABA #021000021 Notices All notices and communications to be addressed as first provided above, except notices with respect to payment and written confirmation of each such payment, to be addressed: The Travelers Insurance Company One Tower Square Hartford, Connecticut 06183-2030 Attention: Investment Group--Cashier 10PB Telefacsimile: (860)277-7941 Name of Nominee in which Notes are to be issued: NONE Taxpayer I.D. Number: 06-0566090 A-6 PRINCIPAL AMOUNT TRANCHE OF NOTES TO BE NAME OF PURCHASERS OF NOTES PURCHASED LUTHERAN BROTHERHOOD Tranche 1 $6,500,000 625 Fourth Avenue South Minneapolis, Minnesota 55415 Attention: Investment Division Payments All payments of principal, interest and premium on the account of the Notes shall be made by bank wire transfer (in immediately available funds) to: Norwest Bank Minnesota, N.A ABA #091000019 For Credit to Trust Clearing Account #0000840245 Attention: Sarah Corcoran For credit to: Lutheran Brotherhood Account Number 12651300 All payments must include the following information: A/C Lutheran Brotherhood Account No: 12561300 Security Description PPN Number 74762E B* 2 Reference Purpose of Payment Interest and/or Principal Breakdown Notices All notices and communications to be addressed as first provided above, except notices with respect to payments and written confirmation of each such payment, to be addressed: Lutheran Brotherhood 625 Fourth Avenue South, 10th Floor Minneapolis, Minnesota 55415 Attention: Investment Accounting/Trading Administrator Name of Nominee in which Notes are to be issued: None Taxpayer I.D. Number: 41-0385700 A-7 PRINCIPAL AMOUNT TRANCHE OF NOTES TO BE NAME OF PURCHASERS OF NOTES PURCHASED MODERN WOODMEN OF AMERICA Tranche 1 $4,500,000 1701 First Avenue Rock Island, Illinois 61201 Attention: Investment Department Payments All payments on or in respect of the Notes to be by bank wire transfer of Federal or other immediately available funds (identifying each payment as "Quanta Services, Inc., 8.01% Series 2000-B Senior Secured Notes due September 1, 2005, PPN 74762E B* 2, principal, premium or interest") to: The Northern Trust Company 50 South LaSalle Street Chicago, Illinois 60675 ABA #071-000-152 Account Name: Modern Woodmen of America Account Number 84352 Notices All notices and communications to be addressed as first provided above, except notices with respect to payments and written confirmation of each such payment, to be addressed Attention: Investment Accounting Department Name of Nominee in which Notes are to be issued: None Taxpayer I.D. Number: 36-1493430 A-8 PRINCIPAL AMOUNT TRANCHE OF NOTES TO BE NAME OF PURCHASERS OF NOTES PURCHASED UNUM LIFE INSURANCE COMPANY OF Tranche 3 $10,000,000 AMERICA Tranche 3 $ 5,000,000 c/o Provident Investment Management, LLC One Fountain Square Chattanooga, Tennessee 37402 Attention: Private Placements Telefacsimile: (423)755-3351 Confirmation: (423) 755-1172 All payments on or in respect of the Notes to be by bank wire transfer of Federal or other immediately available funds to: CUDD & CO. c/o The Chase Manhattan Bank, N.A. New York, New York ABA #021-000-021 SSG Private Income Processing For credit to: A/C #900-9-000200 For further credit to: Unum Life Insurance Company of America Custodial Account Number G08287 Please reference: Issuer: Quanta Services, Inc. PPN: 74762E B#8 Coupon: 8 29% Maturity: September 1, 2010 Principal=$________________ Interest=$_________________ Notices All notices and communications, including notices with respect to payments and written confirmation of each such payment, to be addressed as first provided above. Name of Nominee in which Notes are to be issued: CUDD & CO. Taxpayer I.D. Number for CUDD & Co.: 13-6022143 A-9 PRINCIPAL AMOUNT TRANCHE OF NOTES TO BE NAME OF PURCHASERS OF NOTES PURCHASED PHOENIX HOME LIFE MUTUAL INSURANCE Tranche 3 $10,000,000 COMPANY c/o Phoenix Investment Partners, Ltd. 56 Prospect Street P. O. Box 150480 Hartford, Connecticut 06115-0480 Attention: Private Placements Division Fax Number: (860) 403-7248 Payments All payments on or in respect of the Notes to be by bank wire transfer of Federal or other immediately available funds (identifying each payment as "Quanta Services, Inc., 8.29% Series 2000-B Senior Secured Notes due September 1, 2010, PPN 74762E B# 8, principal, premium or interest") to: ABA #021 000 021 Chase Manhattan Bank, N A New York, New York 10022 Account Number: 900 9000 200 Account Name: Income Processing Reference: Phoenix Home Life Account #G05123 OBI=Quanta Services, Inc., PPN=________, RATE=_________%, DUE=_________ (include Company name, principal and interest breakdown and premium, if any) Notices All notices and communications, including notices with respect to payments and written confirmation of each such payment, to be addressed as first provided above. Name of Nominee in which Notes are to be issued: None Taxpayer I.D. Number: 06-0493340 A-10 SUPPLEMENTAL REPRESENTATIONS The Company represents and warrants to each Purchaser that except as hereinafter set forth in this Exhibit A, each of the representations and warranties set forth in Section 5 of the Note Purchase Agreement is true and correct as of the date hereof with respect to the Series 2000-B Notes with the same force and effect as if each reference to "Series 2000-A Notes" set forth therein was modified to refer to the "Series 2000-B Notes" and each reference to "this Agreement" therein was modified to refer to the Note Purchase Agreement as supplemented by the First Supplement. The Section references hereinafter set forth correspond to the similar sections of the Note Purchase Agreement which are supplemented hereby: Section 5.3. Disclosure. The Note Purchase Agreement, the documents, certificates or other writings delivered to each Purchaser by or on behalf of the Company in connection with the transactions contemplated by the Note Purchase Agreement and the First Supplement and the financial statements listed in Schedule 5.5 to the First Supplement, taken as a whole, do not contain any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein not misleading in light of the circumstances under which they were made. Since December 31, 1999, there has been no change in the financial condition, operations, business, properties or prospects of the Company or any Subsidiary except changes that individually or in the aggregate could not reasonably be expected to have a Material Adverse Effect. Section 5.4 Organization and Ownership of Shares of Subsidiaries. Schedule 5.4 to the First Supplement contains (except as noted therein) complete and correct lists of (i) the Company's Subsidiaries, and showing, as to each Subsidiary, the correct name thereof, the jurisdiction of its organization, and the percentage of shares of each class of its capital stock or similar equity interests outstanding owned by the Company and each other Subsidiary, and (ii) the Company's directors and senior officers. Section 5.13. Private Offering by the Company. Neither the Company nor anyone acting on its behalf has offered the Series 2000-B Notes or any similar securities for sale to, or solicited any offer to buy any of the same from, or otherwise approached or negotiated in respect thereof with, any Person other than the Purchasers and not more than 40 other Institutional Investors, each of which has been offered the Series 2000-B Notes at a private sale for investment. Neither the Company nor anyone acting on its behalf has taken, or will take, any action that would subject the issuance or sale of the Notes to the registration requirements of Section 5 of the Securities Act. Section 5.14. Use of Proceeds; Margin Regulations. The Company will apply the proceeds of the sale of the Series 2000-B Notes to repay existing indebtedness, for acquisitions and for other general corporate purposes. No part of the proceeds from the sale of the Series 2000-B Notes pursuant to the First Supplement will be used, directly or indirectly, for the purpose of buying or carrying any margin stock within the meaning of Regulation U of the Board of Governors of the Federal Reserve System (12 CFR 222), or for the purpose of buying or carrying or trading in any securities under such circumstances as to involve the Company in a violation of Regulation X of said Board (12 CFR 224) or to involve any broker or dealer in a EXHIBIT A (to Supplement) violation of Regulation T of said Board (12 CFR 220). As used in this Section, the terms "margin stock" and "purpose of buying or carrying" shall have the meanings assigned to them in said Regulation U. Section 5.15. Existing Debt; Future Liens. (a) Schedule 5.15 to the First Supplement sets forth a complete and correct list of all outstanding Debt of the Company and its Subsidiaries as of July 31, 2000, since which date there has been no Material change in the amounts, interest rates, sinking funds, installment payments or maturities of the Debt of the Company or its Subsidiaries except that pursuant to the underwriter's overallotment option an additional $22,500,000 aggregate principal amount of the Subordinated Convertible Notes were issued on August 7, 2000. Neither the Company nor any Subsidiary is in default and no waiver of default is currently in effect, in the payment of any principal or interest on any Debt of the Company or such Subsidiary in an unpaid amount of $1,000,000 or more and no event or condition exists with respect to any Debt of the Company or any Subsidiary in an unpaid amount of $1,000,000 or more that would permit (or that with notice or the lapse of time, or both, would permit) one or more Persons to cause such Debt to become due and payable before its stated maturity or before its regularly scheduled dates of payment. E-A-2 ORGANIZATION AND OWNERSHIP OF SHARES OF SUBSIDIARIES; AFFILIATES The following Subsidiaries are 100% owned by the Person listed in the "Stockholder" Column. Additionally, Trawick Construction Company owns a 25% interest in Lightwave, LLC, an Alabama limited liability company, and Mears Group, Inc. owns a 33% interest in MLM Services, LLC, an Oklahoma limited liability company. The Company periodically invests in bank deposits and other short term money market instruments as part of its cash management system. - -------------------------------------------------------------------------------------------------------------------- STATE OF SUBSIDIARY INCORPORATION STOCKHOLDER - -------------------------------------------------------------------------------------------------------------------- Advanced Communication Technologies, Inc. Oregon NorAm Telecommunications, Inc. - -------------------------------------------------------------------------------------------------------------------- Arby Construction, Inc. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Austin Trencher, Inc. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- CCLC, Inc. Delaware Conti Communications, Inc. - -------------------------------------------------------------------------------------------------------------------- Coast to Coast, L.L.C. California Environmental Professional Associates, Limited - -------------------------------------------------------------------------------------------------------------------- Computapole, Inc. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Conti Communications, Inc. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Croce Electric Company, Inc. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Crown Fiber Communications, Inc. Virginia Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Dillard Smith Construction Company Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Driftwood Electrical Contractors, Inc. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Edwards Pipeline Company, Inc. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Environmental Professional Associates, Limited California Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Fiber Technology, Inc. Texas Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Five Points Construction Company Delaware Underground Construction Co., Inc. - -------------------------------------------------------------------------------------------------------------------- GEM Engineering Co., Inc. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Golden State Utility Co. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- H.L. Chapman Pipeline Construction, Inc. Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Haines Construction Company Delaware Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- Harker & Harker, Inc. Nevada Quanta Services, Inc. - -------------------------------------------------------------------------------------------------------------------- SCHEDULE 5.4 (to Supplement) - ------------------------------------------------------------------------------------------------------------------ STATE OF SUBSIDIARY INCORPORATION STOCKHOLDER - ------------------------------------------------------------------------------------------------------------------ Intermountain Electric, Inc. Colorado Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ IRBY Construction Company Mississippi Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Lake Norman Pipeline, LLC North Carolina Edwards Pipeline Company, Inc. - ------------------------------------------------------------------------------------------------------------------ Line Equipment Sales Co., Inc. South Carolina Utilities Construction Co., Inc. - ------------------------------------------------------------------------------------------------------------------ Logical Link, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Manuel Bros., Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Mears/CPG, LLC Michigan Mears Group, Inc. - ------------------------------------------------------------------------------------------------------------------ Mears Engineering, LLC Michigan Mears Group, Inc. - ------------------------------------------------------------------------------------------------------------------ Mears Group, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Mears/HDD, LLC Michigan Mears Group, Inc. - ------------------------------------------------------------------------------------------------------------------ Mears Pipeline Services, Inc. Michigan Mears Group, Inc. - ------------------------------------------------------------------------------------------------------------------ Mears Services, LLC Michigan Mears Group, Inc. - ------------------------------------------------------------------------------------------------------------------ Metro Underground Services, Inc. Illinois Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ NetCom Management Group, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Network Communications Services, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ North Pacific Construction Company Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ North Sky Communications Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Northern Line Layers, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Pac West Construction, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ PAR Electrical Contractors, Inc. Missouri Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ PDG Electric Company Florida Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Potelco, Inc. Washington Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ QSI, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Quanta Delaware, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Quanta XVII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Quanta XLI Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Quanta XLII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ Quanta XLV Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------------ 5.4-2 - ------------------------------------------------------------------------------------------------------------ STATE OF SUBSIDIARY INCORPORATION STOCKHOLDER - ------------------------------------------------------------------------------------------------------------ Quanta XLVI Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta XLVIII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LI Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LIII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LIV Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LV Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LVI Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LVII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LVIII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LIX Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LX Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXI Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXII Acquisition. Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXIII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXIV Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXV Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXVI Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXVII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXVIII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXIX Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXX Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXXI Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXXII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXXIII Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta LXXIV Acquisition, Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ Quanta Services Management Partnership, L. P. Texas - ------------------------------------------------------------------------------------------------------------ Quanta Utility Installation Co., Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ R. A. Waffensmith & Co., Inc. Delaware Quanta Services, Inc. - ------------------------------------------------------------------------------------------------------------ 5.4-3 - ----------------------------------------------------------------------------------------------------------------------- STATE OF SUBSIDIARY INCORPORATION STOCKHOLDER - ----------------------------------------------------------------------------------------------------------------------- Ranger Directional, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- S. K. S. Pipeliners, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Seaward Corporation Maine Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Southeast Pipeline Construction, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Spalj Construction Company Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Specialty Drilling Technology, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Sullivan Welding, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Sumter Builders, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- SynerTec Inc. South Carolina Utilities Construction Co., Inc. - ----------------------------------------------------------------------------------------------------------------------- Telecom Network Specialists, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- The Ryan Company, Inc. Massachusetts Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Tom Allen Construction Company Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- TRANS TECH Electric, Inc. Indiana Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Trawick Construction Co. Florida Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- TTM, Inc. North Carolina Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- TVS Systems, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Underground Construction Co., Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Utilco, Inc. Georgia Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Utilities Construction Co., Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- VCI Telecom, Inc. Delaware Quanta Services, Inc.. - ----------------------------------------------------------------------------------------------------------------------- W.H.O.M. Corporation California Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- Wade D. Taylor, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- W. C. Communications, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- World Fiber, Inc. Delaware Quanta Services, Inc. - ----------------------------------------------------------------------------------------------------------------------- The Company's directors are James R. Ball, John R. Colson, John A. Martell, Gary A. Tucci, Michael T. Wilson, John R. Wilson, Robert K. Green, James G. Miller and Vincent D. Foster. 5.4-4 The Company's executive officers are John R. Colson, James H. Haddox, John R. Wilson, Gary A. Tucci Elliott C. Robbins, James F. O'Neill III, Brad Eastman, Luke T. Spalj, Nicholas M. Grindstaff and Derrick A. Jensen. 5.4-5 FINANCIAL STATEMENTS The Company has delivered to each Purchaser copies of its audited consolidated balance sheets as of December 31, 1997, 1998, and 1999 and the related consolidated statements of operations, cash flows and stockholders' equity for the three years ended December 31, 1998, and December 31, 1999 and its unaudited consolidated balance sheet as of June 30, 2000 and the related consolidated statement of operations and cash flows for the six-month periods ended June 30, 1999 and 2000. SCHEDULE 5.5 (to Supplement) EXISTING DEBT; FUTURE LIENS As of July 31, 2000, the existing Debt of the Company included the Company's Subordinated Convertible Notes in the principal amount of $150,000,000, the Series 2000-A Senior Secured Notes in the aggregate outstanding principal amount of $150,000,000, the EPA Notes in the principal amount of $632,000, $16,750,000 outstanding under the Bank Credit Agreement and the following Debt of the Company's subsidiaries. BALANCE AS OF SUBSIDIARY CREDITOR 7/31/00 Arby United Leasing Associates $ 3,537 Chapman Safeco Credit 2,968,361 Chapman Financial Federal 2,515,672 Chapman KDC Financial 170,739 Chapman Ford Motor Credit 13,046 ----------- Subtotal - Chapman $ 5,667,818 Dillard Smith Other 330,938 Dillard Smith Caterpillar Financing 218,609 Dillard Smith US Bankcorp 11,235 ----------- Subtotal - Dillard $ 560,782 EPA Ford Motor Credit $ 243,108 GSU Safeco Credit 86,869 GSU Ford Motor Credit 9,558 GSU GMAC 7,663 ----------- Subtotal - GSU $ 104,090 Intermountain Glesby/Marks Leasing $ 163,685 Manuel Bros. Associates Commercial 393,544 Manuel Bros. Orix Corp. 142,812 Manuel Bros. KDC Financial 37,277 Manuel Bros. Other 20,695 Manuel Bros. Ford Motor Credit 6,678 Manuel Bros. GMAC 5,955 ----------- Subtotal - Manuel Bros. $ 606,960 NLL US Bankcorp 1,010,537 NLL 1st Source Bank 665,983 NLL John Deere Credit 57,604 NLL Reimers 21,859 ----------- SCHEDULE 5.15 (to Supplement) BALANCE AS OF SUBSIDIARY CREDITOR 7/31/00 Subtotal - NLL $ 1,755,982 North Sky Case Credit 127,584 North Sky Ford Motor Credit 2,430 ------------ Subtotal - North Sky $ 130,014 Pac West Associates Commercial 53,039 Pac West CIT Group 42,793 Pac West Ford Motor Credit 13,266 ------------ Subtotal - Pac West $ 109,098 PAR Electric Associates Commercial 396,232 PAR Electric Ford Motor Credit 106,578 PAR Electric Caterpillar Financing 26,072 ------------ Subtotal PAR Electric $ 528,882 PDG CIT Group $ 92,271 Potelco Case Credit 515,064 Potelco Vermeer 175,286 Potelco 1st National Auto Lease 114,587 Potelco 1st Security Leasing 71,496 Potelco The Halton Company 50,264 ------------ Subtotal - Potelco $ 926,697 Ryan Co. GMAC 117,870 Ryan Co. Chrysler 60,524 Ryan Co. Ford Motor Credit 44,303 Ryan Co. Compass Bank 15,249 ------------ Subtotal - Ryan CO. $ 237,946 Spalj Carlson Tractor 48,578 Spalj Caterpillar Financing 36,577 Spalj Ziegler 22,068 ------------ Subtotal - Spalj $ 107,223 Sumter Navistar 2,348,439 Sumter GE Capital 961,433 Sumter Keycorp 839,582 Sumter Caterpillar Financing 725,330 Sumter Safeco Credit 399,288 Sumter Lease Plan USA 147,096 Sumter SouthTrust 90,085 5.15-2 BALANCE AS OF SUBSIDIARY CREDITOR 7/31/00 Sumter Associates Commercial 81,411 Sumter Wachovia Bank 60,814 Sumter Ford Motor Credit 22,007 -------------- Subtotal - Sumter $ 5,675,485 Tom Allen Bank One $ 515,923 Trans Tech Norwest 81,299 Trans Tech Ambassador Finance/Natnl 37,641 City Leasing Corp. -------------- Subtotal - Trans Tech $ 118,940 Trawick SunTrust Bank $ 1,847,413 Underground GE Capital 396,018 Underground Caterpillar Financing 183,542 -------------- Subtotal - Trans Tech $ 579,560 Utilco Associates Commercial 294,606 Utilco GMAC 4,729 -------------- Subtotal - Utilco $ 299,335 VCI Newcourt Financial $ 13,130 NCS Ford Motor Credit $ 16,725 West Coast GMAC 8,906 West Coast Ford Motor Credit 8,246 -------------- Subtotal - West Coast $ 17,151 Total Debt at Subsidiaries $ 20,321,756 TOTAL DEBT $337, 703, 756 ============== 5.15-3 [FORM OF SERIES 2000-B, TRANCHE 1 NOTES] QUANTA SERVICES, INC. 8.01% SERIES 2000-B SENIOR SECURED NOTE, TRANCHE 1, DUE SEPTEMBER 1, 2005 No. [____________] [Date] $[_______________] PPN 74762E B* 2 FOR VALUE RECEIVED, the undersigned, QUANTA SERVICES, INC. (herein called the "Company"), a corporation organized and existing under the laws of the State of Delaware, hereby promises to pay to [________________], or registered assigns, the principal sum of [________________] DOLLARS on September 1, 2005, with interest (computed on the basis of a 360-day year of twelve 30-day months) (a) on the unpaid balance thereof at the rate of 8.01% per annum from the date hereof, payable semiannually, on the first day of March and September in each year, commencing on the first of such dates after the date hereof, until the principal hereof shall have become due and payable, and (b) to the extent permitted by law on any overdue payment (including any overdue prepayment) of principal, any overdue payment of interest and any overdue payment of any Make-Whole Amount (as defined in the Note Purchase Agreement referred to below), payable semiannually as aforesaid (or, at the option of the registered holder hereof, on demand), at a rate per annum from time to time equal to the greater of (i) 10.01% or (ii) 2% over the rate of interest publicly announced by Bank of America, N. A. from time to time in New York, New York, as its "base" or "prime" rate. Payments of principal of, interest on and any Make-Whole Amount with respect to this Note are to be made in lawful money of the United Slates of America at the principal office of Bank of America, N. A, in New York, New York, or at such other place as the Company shall have designated by written notice to the holder of this Note as provided in the Note Purchase Agreement referred to below. This Note is one of a series of Senior Secured Notes (the "Notes ") issued pursuant to a Supplement to the Note Purchase Agreement dated as of March 1, 2000 (as from time to time amended, supplemented or modified, the "Note Purchase Agreement"), between the Company, the Purchasers named therein and Additional Purchasers of Notes from time to time issued pursuant to any Supplement to the Note Purchase Agreement. This Note and the holder hereof are entitled equally and ratably with the holders of all other Notes of all series from time to time outstanding under the Note Purchase Agreement to all the benefits provided for thereby or referred to therein. Each holder of this Note will be deemed, by its acceptance hereof, (i) to have agreed to the confidentiality provisions set forth in Section 20 of the Note Purchase Agreement and (ii) to have made the representation set forth in Section 6.2 of the Note Purchase Agreement, provided that such holder may (in reliance upon information provided by the Company, which shall not be unreasonably withheld) make a representation to the effect that the purchase by such holder of any Note will not constitute a non-exempt prohibited transaction under Section 406(a) of ERISA. EXHIBIT 1 (to Supplement) This Note is registered with the Company and, as provided in the Note Purchase Agreement, upon surrender of this Note for registration of transfer, duly endorsed, or accompanied by a written instrument of transfer duly executed, by the registered holder hereof or such holder's attorney duly authorized in writing, a new Note of the same series for a like principal amount will be issued to, and registered in the name of, the transferee. Prior to due presentment for registration of transfer, the Company may treat the person in whose name this Note is registered as the owner hereof for the purpose of receiving payment and for all other purposes, and the Company will not be affected by any notice to the contrary. This Note is not subject to regularly scheduled prepayments of principal. This Note is subject to optional prepayment, in whole or from time to time in part, at the times and on the terms specified in the Note Purchase Agreement, but not otherwise If an Event of Default, as defined in the Note Purchase Agreement, occurs and is continuing, the principal of this Note may be declared or otherwise become due and payable in the manner, at the price (including any applicable Make-Whole Amount) and with the effect provided in the Note Purchase Agreement This Note shall be construed and enforced in accordance with, and the rights of the parties shall be governed by, the law of the Stale of New York excluding choice-of-law principles of the law of such State that would require the application of the laws of a jurisdiction other than such State QUANTA SERVICES, INC. By: __________________________________ Name: _____________________________ Title: ____________________________ E-1-2 [FORM OF SERIES 2000-B, TRANCHE 2 NOTES] QUANTA SERVICES, INC, 8.06% SERIES 2000-B SENIOR SECURED NOTE, TRANCHE 2, DUE SEPTEMBER 1, 2006 No. [_________] [Date] $[____________] PPN 74762E B@ 0 FOR VALUE RECEIVED, the undersigned, QUANTA SERVICES, INC. (herein called the "Company"), a corporation organized and existing under the laws of the State of Delaware, hereby promises to pay to [______________], or registered assigns, the principal sum of [______________] DOLLARS on September 1, 2006, with interest (computed on the basis of a 360-day year of twelve 30-day months) (a) on the unpaid balance thereof at the rate of 8.06% per annum from the date hereof, payable semiannually, on the first day of March and September in each year, commencing on the first of such dates after the date hereof, until the principal hereof shall have become due and payable, and (b) to the extent permitted by law on any overdue payment (including any overdue prepayment) of principal, any overdue payment of interest and any overdue payment of any Make-Whole Amount (as defined in the Note Purchase Agreement referred to below), payable semiannually as aforesaid (or, at the option of the registered holder hereof, on demand), at a rate per annum from time to time equal to the greater of (i) 10.06% or (ii) 2% over the rate of interest publicly announced by Bank of America, N.A. from time to time in New York, New York, as its "base" or "prime" rate. Payments of principal of, interest on and any Make-Whole Amount with respect to this Note are to be made in lawful money of the United States of America at the principal office of Bank of America, N.A., in New York, New York, or at such other place as the Company shall have designated by written notice to the holder of this Note as provided in the Note Purchase Agreement referred to below. This Note is one of a series of Senior Secured Notes (the "Notes") issued pursuant to a Supplement to the Note Purchase Agreement dated as of March 1, 2000 (as from time to time amended, supplemented or modified, the "Note Purchase Agreement"), between the Company, the Purchasers named therein and Additional Purchasers of Notes from time to time issued pursuant to any Supplement to the Note Purchase Agreement. This Note and the holder hereof are entitled equally and ratably with the holders of all other Notes of all series from time to time outstanding under the Note Purchase Agreement to all the benefits provided for thereby or referred to therein. Each holder of this Note will be deemed, by its acceptance hereof, (i) to have agreed to the confidentiality provisions set forth in Section 20 of the Note Purchase Agreement and (ii) to have made the representation set forth in Section 6.2 of the Note Purchase Agreement, provided that such holder may (in reliance upon information provided by the Company, which shall not be unreasonably withheld) make a representation to the effect that the purchase by such holder of any Note will not constitute a non-exempt prohibited transaction under Section 406(a) of ERISA. EXHIBIT 2 (to Supplement) This Note is registered with the Company and, as provided in the Note Purchase Agreement, upon surrender of this Note for registration of transfer, duly endorsed, or accompanied by a written instrument of transfer duly executed, by the registered holder hereof or such holder's attorney duly authorized in writing, a new Note of the same series for a like principal amount will be issued to, and registered in the name of, the transferee. Prior to due presentment for registration of transfer, the Company may treat the person in whose name this Note is registered as the owner hereof for the purpose of receiving payment and for all other purposes, and the Company will not be affected by any notice to the contrary. This Note is not subject to regularly scheduled prepayments of principal. This Note is subject to optional prepayment, in whole or from time to time in part, at the times and on the terms specified in the Note Purchase Agreement, but not otherwise. If an Event of Default, as defined in the Note Purchase Agreement, occurs and is continuing, the principal of this Note may be declared or otherwise become due and payable in the manner, at the price (including any applicable Make-Whole Amount) and with the effect provided in the Note Purchase Agreement. This Note shall be construed and enforced in accordance with, and the rights of the parties shall be governed by, the law of the State of New York excluding choice-of-law principles of the law of such State that would require the application of the laws of a jurisdiction other than such State. QUANTA SERVICES, INC. By:__________________________________ Name:_____________________________ Title:____________________________ E-2-2 [FORM OF SERIES 2000-B, TRANCHE 3 NOTES] QUANTA SERVICES, INC 8.29% SERIES 2000-B SENIOR SECURED NOTE, TRANCHE 3, DUE SEPTEMBER 1, 2010 No. [___________] [Date] $[_____________] PPN 74762E B# 8 FOR VALUE RECEIVED, the undersigned, QUANTA SERVICES, INC. (herein called the "Company"), a corporation organized and existing under the laws of the State of Delaware, hereby promises to pay to [_______________], or registered assigns, the principal sum of [_______________] DOLLARS on September 1, 2010, with interest (computed on the basis of a 360-day year of twelve 30-day months) (a) on the unpaid balance thereof at the rate of 8. 29% per annum from the date hereof, payable semiannually, on the first day of March and September in each year, commencing on the first of such dates after the date hereof, until the principal hereof shall have become due and payable, and (b) to the extent permitted by law on any overdue payment (including any overdue prepayment) of principal, any overdue payment of interest and any overdue payment of any Make-Whole Amount (as defined in the Note Purchase Agreement referred to below), payable semiannually as aforesaid (or, at the option of the registered holder hereof, on demand), at a rate per annum from time to time equal to the greater of (i) 10. 29% or (ii) 2% over the rate of interest publicly announced by Bank of America, N. A. from time to time in New York, New York, as its "base" or "prime" rate. Payments of principal of, interest on and any Make-Whole Amount with respect to this Note are to be made in lawful money of the United States of America at the principal office of Bank of America, N.A., in New York, New York, or at such other place as the Company shall have designated by written notice to the holder of this Note as provided in the Note Purchase Agreement referred to below. This Note is one of a series of Senior Secured Notes (the "Notes") issued pursuant to a Supplement to the Note Purchase Agreement dated as of March 1, 2000 (as from time to time amended, supplemented or modified, the "Note Purchase Agreement"), between the Company, the Purchasers named therein and Additional Purchasers of Notes from time to time issued pursuant to any Supplement to the Note Purchase Agreement. This Note and the holder hereof are entitled equally and ratably with the holders of all other Notes of all series from time to time outstanding under the Note Purchase Agreement to all the benefits provided for thereby or referred to therein. Each holder of this Note will be deemed, by its acceptance hereof, (i) to have agreed to the confidentiality provisions set forth in Section 20 of the Note Purchase Agreement and (ii) to have made the representation set forth in Section 6.2 of the Note Purchase Agreement, provided that such holder may (in reliance upon information provided by the Company, which shall not be unreasonably withheld) make a representation to the effect that the purchase by such holder of any Note will not constitute a non-exempt prohibited transaction under Section 406(a) of ERISA. EXHIBIT 3 (to Supplement) This Note is registered with the Company and, as provided in the Note Purchase Agreement, upon surrender of this Note for registration of transfer, duly endorsed, or accompanied by a written instrument of transfer duly executed, by the registered holder hereof or such holder's attorney duly authorized in writing, a new Note of the same series for a like principal amount will be issued to, and registered in the name of, the transferee. Prior to due presentment for registration of transfer, the Company may treat the person in whose name this Note is registered as the owner hereof for the purpose of receiving payment and for all other purposes, and the Company will not be affected by any notice to the contrary. This Note is not subject to regularly scheduled prepayments of principal. This Note is subject to optional prepayment, in whole or from time to time in part, at the times and on the terms specified in the Note Purchase Agreement, but not otherwise. If an Event of Default, as defined in the Note Purchase Agreement, occurs and is continuing, the principal of this Note may be declared or otherwise become due and payable in the manner, at the price (including any applicable Make-Whole Amount) and with the effect provided in the Note Purchase Agreement. This Note shall be construed and enforced in accordance with, and the rights of the parties shall be governed by, the law of the State of New York excluding choice-of-law principles of the law of such State that would require the application of the laws of a jurisdiction other than such State. QUANTA SERVICES, INC. By:__________________________________ Name:_____________________________ Title:____________________________ E-3-2 GUARANTY RATIFICATION To the Institutional Investors which are Dated as of September 1, 2000 Purchasers of the Series 2000-B Notes of Quanta Services, Inc. Re: $30,000,000 8.01% Series 2000-B Senior Secured Notes, Tranche 1, Due September 1, 2005 and $5,000,000 8.06% Series 2000-B Senior Secured Notes, Tranche 2, Due September 1, 2006 and $25,000,000 8.29% Series 2000-B Senior Secured Notes, Tranche 3, Due September 1, 2010 (collectively the "Series 2000-B Notes") of Quanta Services, Inc. Ladies and Gentlemen: Reference is made to the First Supplement to Note Agreement dated as of September 1, 2000 (the "First Supplement") to be entered into by and among Quanta Services, Inc., a Delaware corporation (the "Company") and you providing for the purchase of the Series 2000-B Notes by you. All terms used and not otherwise defined herein shall have the respective meanings assigned thereto in the First Supplement. As an inducement to your purchase of the Series 2000-B Notes referred to above, the undersigned does hereby ratify and reaffirm that the payment of all principal and interest and all other amounts becoming due from time to time on the Series 2000-B Notes is absolutely and unconditionally guaranteed by the undersigned as provided for by the Guaranty dated as of March 1, 2000 (the "Guaranty") and the undersigned hereby certifies that the Guaranty is unmodified and remains in full force and effect. EXHIBIT B (to Supplement) IN WITNESS WHEREOF, each Guarantor has caused this Guaranty Ratification to be duly executed and delivered by its duly authorized officer as of the date first above written. ADVANCED COMMUNICATION TECHNOLOGIES, INC., an Oregon corporation ARBY CONSTRUCTION, INC., a Delaware corporation AUSTIN TRENCHER, INC., a Delaware corporation CCLC, INC., a Delaware corporation COAST TO COAST, LLC, a California limited liability company COMPUTAPOLE, INC., a Delaware corporation CONTI COMMUNICATIONS, INC., a Delaware corporation CROCE ELECTRIC COMPANY, INC., a Delaware corporation CROWN FIBER COMMUNICATIONS, INC., a Virginia corporation DILLARD SMITH CONSTRUCTION COMPANY, a Delaware corporation DRIFTWOOD ELECTRICAL CONTRACTORS, INC., a Delaware corporation EDWARDS PIPELINE COMPANY, INC., a Delaware corporation ENVIRONMENTAL PROFESSIONAL ASSOCIATES, LIMITED, a California corporation FIBER TECHNOLOGY, INC., a Texas corporation FIVE POINTS CONSTRUCTION COMPANY, a Delaware corporation GEM ENGINEERING CO., INC., a Delaware corporation GOLDEN STATE UTILITY CO., a Delaware corporation H.L. CHAPMAN PIPELINE CONSTRUCTION, INC., a Delaware corporation HAINES CONSTRUCTION COMPANY, a Delaware corporation HARKER & HARKER, INC., a Nevada corporation INTERMOUNTAIN ELECTRIC, INC., a Colorado corporation IRBY CONSTRUCTION COMPANY, a Mississippi corporation LINE EQUIPMENT SALES CO., INC., a South Carolina corporation LOGICAL LINK, INC., a Delaware corporation MANUEL BROS, INC., a Delaware corporation MEARS GROUP, INC., a Delaware corporation MEARS/CPG, LLC, a Michigan limited liability company MEARS ENGINEERING, LLC, a Michigan limited liability company E-B-2 MEARS/HDD, LLC, a Michigan limited liability company MEARS PIPELINE SERVICES, INC., a Michigan corporation MEARS SERVICES, LLC, a Michigan limited liability company METRO UNDERGROUND SERVICES, INC., an Illinois corporation NETCOM MANAGEMENT GROUP, INC., a Delaware corporation NETWORK COMMUNICATIONS SERVICES, INC., a Delaware corporation NORTH PACIFIC CONSTRUCTION Co., INC., a Delaware corporation NORTH SKY COMMUNICATIONS, a Delaware corporation NORTHERN LINE LAYERS, INC., a Delaware corporation PAC WEST CONSTRUCTION, INC., a Delaware corporation PAR ELECTRICAL CONTRACTORS, INC., a Missouri corporation PDG ELECTRIC COMPANY, a Florida corporation POTELCO, INC., a Washington corporation QSI, INC., a Delaware corporation QUANTA XVII ACQUISITION, INC., a Delaware corporation QUANTA XLI ACQUISITION, INC., a Delaware corporation QUANTA XLII ACQUISITION, INC., a Delaware corporation QUANTA XLV ACQUISITION, INC., a Delaware corporation QUANTA XLVI ACQUISITION, INC., a Delaware corporation QUANTA XLVIII ACQUISITION, INC., a Delaware corporation QUANTA LI ACQUISITION, INC., a Delaware corporation QUANTA LII ACQUISITION, INC., a Delaware corporation QUANTA LIII ACQUISITION, INC., a Delaware corporation QUANTA LIV ACQUISITION, INC., a Delaware corporation QUANTA LV ACQUISITION, INC., a Delaware corporation QUANTA LVI ACQUISITION, INC., a Delaware corporation QUANTA LVII ACQUISITION, INC., a Delaware corporation QUANTA LVIII ACQUISITION, INC., a Delaware corporation E-B-3 QUANTA LIX ACQUISITION, INC., a Delaware corporation QUANTA LX ACQUISITION, INC., a Delaware corporation QUANTA LXI ACQUISITION, INC, a Delaware corporation QUANTA LXII ACQUISITION, INC., a Delaware corporation QUANTA LXIII ACQUISITION, INC., a Delaware corporation QUANTA LXIV ACQUISITION, INC., a Delaware corporation QUANTA LXV ACQUISITION, INC., a Delaware corporation QUANTA LXVI ACQUISITION, INC., a Delaware corporation QUANTA LXVII ACQUISITION, INC., a Delaware corporation QUANTA LXVIII ACQUISITION, INC., a Delaware corporation QUANTA LXIX ACQUISITION, INC., a Delaware corporation QUANTA LXX ACQUISITION, INC., a Delaware corporation QUANTA LXXI ACQUISITION, INC., a Delaware corporation QUANTA LXXII ACQUISITION, INC, a Delaware corporation QUANTA LXXIII ACQUISITION, INC., a Delaware corporation QUANTA LXXIV ACQUISITION, INC., a Delaware corporation QUANTA DELAWARE, INC., a Delaware corporation QUANTA SERVICES OF CANADA LTD., a British Columbia corporation QUANTA SERVICES MANAGEMENT PARTNERSHIP, L.P., a Texas limited partnership QUANTA UTILITY INSTALLATION Co., INC., a Delaware corporation R.A. WAFFENSMITH & Co., INC., a Delaware corporation RANGER DIRECTIONAL, INC., a Delaware corporation S.K.S. PIPELINERS, INC., a Delaware corporation SEAWARD CORPORATION, a Maine corporation SOUTHEAST PIPELINE CONSTRUCTION, INC., a Delaware corporation SPALJ CONSTRUCTION COMPANY, a Delaware corporation SPECIALTY DRILLING, INC., a Delaware corporation E-B-4 SULLIVAN WELDING, INC., a Delaware corporation SUMTER BUILDERS, INC., a Delaware corporation SYNERTEC INC., a South Carolina corporation TELECOM NETWORK SPECIALISTS, INC., a Delaware corporation THE RYAN COMPANY, INC., a Massachusetts corporation TOM ALLEN CONSTRUCTION COMPANY, a Delaware corporation TRANS TECH ELECTRIC, INC., an Indiana corporation TRAWICK CONSTRUCTION Co., a Florida corporation TTM, INC., a North Carolina corporation TVS SYSTEMS, INC., a Delaware corporation UNDERGROUND CONSTRUCTION Co., INC., a Delaware corporation UTILCO, INC., a Georgia corporation UTILITIES CONSTRUCTION Co., INC., a Delaware corporation VCI TELCOM, INC., a Delaware corporation W.H.O.M. CORPORATION, a California corporation WADE D. TAYLOR, INC., a Delaware corporation W.C. COMMUNICATIONS, INC., a Delaware corporation WORLD FIBER, INC., a Delaware corporation By:_________________________________________ Brad Eastman, President or Vice President of each Guarantor E-B-5 COAST To COAST, LLC, a California limited liability company By: ENVIRONMENTAL PROFESSIONAL ASSOCIATES, Limited, Its Member By: ____________________________________ Brad Eastman, Vice President QUANTA SERVICES MANAGEMENT PARTNERSHIP, L.P., a Texas limited liability partnership By: QSI, INC., Its General Partner By: ____________________________________ Brad Eastman, Vice President Address for Each Company: c/o Quanta Services, Inc 1360 Post Oak Blvd., Suite 2100 Houston, TX 77056 Attn: General Counsel Fax No: (713)629-7676 Phone No.: (713)629-7600 E-B-6 GUARANTY JOINDER AGREEMENT This Guaranty Joinder Agreement dated as of September 1, 2000, is from each of the undersigned (each an "Additional Guarantor") to the Noteholders (defined below): RECITALS: A. Quanta Services, Inc., a Delaware corporation (the "Issuer"), and certain institutional investors (the "Initial Purchasers") have entered into that certain Note Purchase Agreement dated as of March 1, 2000 (the "Original Note Purchase Agreement"). The Issuer and certain institutional investors (the "First Supplement Purchasers") have entered into that certain First Supplement to Note Purchase Agreement dated as of September 1, 2000 (the "First Supplement"). The Original Note Purchase Agreement, as supplemented by the First Supplement and as from time to time supplemented by one or more Supplements, is hereinafter referred to as the "Note Purchase Agreement." B. Under and pursuant to the Original Note Purchase Agreement the Issuer (i) has issued and sold $73,000,000 aggregate principal amount of its 8.46% Series 2000-A Senior Secured Notes, Tranche 1, due March 1, 2005, $41, 500,000 aggregate principal amount of its 8.55% Series 2000-A Senior Secured Notes, Tranche 2, due March 1, 2007 and $35,500,000 aggregate principal amount of its 8.61% Series 2000-A Senior Secured Notes, Tranche 3, due March 1, 2010 (collectively, the "Series 2000-A Notes") to the Initial Purchasers, (ii) under and pursuant to the First Supplement will issue and sell $30,000,000 aggregate principal amount of its 8.01% Series 2000-B Senior Secured Notes, Tranche 1, due September 1, 2005, $5,000,000 aggregate principal amount of its 8.06% Series 2000-B Senior Secured Notes, Tranche 2, due September 1, 2006 and $25, 000, 000 aggregate principal amount of its 8.29% Series 2000-B Senior Secured Notes, Tranche 3, due September 1, 2010 (collectively, the "Series 2000-B Notes") to the First Supplement Purchasers and (iii) may, from time to time, issue and sell additional Series of its secured promissory notes (the "Additional Notes"; the Series 2000-A Notes, Series 2000-B Notes and the Additional Notes are collectively referred to herein as the "Notes") to institutional investors (the "Additional Purchasers"). The Initial Purchasers, First Supplement Purchasers and the Additional Purchasers are collectively referred to herein as the "Purchasers"; and holders of Notes are collectively referred to herein as the "Noteholders". C. As a condition to their purchase of the Series 2000-A Notes, the Initial Purchasers required that certain Subsidiaries of the Issuer execute a Guaranty dated as of March 1, 2000 (the "Guaranty") and absolutely and unconditionally guarantee the principal of and premium, if any, and interest on the Notes. D. Capitalized terms used but not defined herein have the meanings given them in the Note Purchase Agreement. NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, each Additional Guarantor agrees, for the benefit of each Noteholder, as follows: EXHIBIT C (to Supplement) Pursuant to Section 9.6 of the Note Purchase Agreement, the Issuer has agreed to cause the Additional Guarantors to join in the Guaranty. In accordance with the requirements of the Note Purchase Agreement, the Additional Guarantors desire to amend the definition of Guarantor (as the same may have been heretofore amended) set forth in the Guaranty attached hereto so that at all times from and after the date hereof, each Additional Guarantor shall be jointly and severally liable as set forth in the Guaranty for the obligations of the Issuer under the Note Purchase Agreement and the Notes to the extent and in the manner set forth in the Guaranty. The undersigned is the duly elected _______________of [each] Additional Guarantor, a wholly owned subsidiary of the Issuer, and is duly authorized to execute and deliver this Guaranty Joinder Agreement. The execution by the undersigned of this Guaranty Joinder Agreement shall evidence its consent to and acknowledgment and approval of the terms set forth herein and in the Guaranty and by such execution the Additional Guarantors shall be deemed to have made in favor of the Noteholders the representations and warranties set forth in Article II of the Guaranty. Upon execution of this Guaranty Joinder Agreement, the Guaranty shall be deemed to be amended as set forth above. Except as amended herein, the terms and provisions of the Guaranty are hereby ratified, confirmed and approved in all respects. E-C-2 Any and all notices, requests, certificates and other instruments (including the Notes) may refer to the Guaranty without making specific reference to this Guaranty Joinder Agreement, but nevertheless all such references shall be deemed to include this Guaranty Joinder Agreement unless the context shall otherwise require. IRBY CONSTRUCTION COMPANY, a Mississippi corporation LINE EQUIPMENT SALES Co., INC., a South Carolina corporation MEARS/CPG, LLC, a Michigan limited liability company MEARS ENGINEERING, LLC, a Michigan limited liability company MEARS/HDD, LLC, a Michigan limited liability company MEARS PIPELINE SERVICES, INC., a Michigan corporation METRO UNDERGROUND SERVICES, INC., an Illinois corporation QUANTA LIV ACQUISITION, INC., a Delaware corporation QUANTA LV ACQUISITION, INC., a Delaware corporation QUANTA LVI ACQUISITION, INC., a Delaware corporation QUANTA LVII ACQUISITION, INC., a Delaware corporation QUANTA LVIII ACQUISITION, INC., a Delaware corporation QUANTA LVIX ACQUISITION, INC., a Delaware corporation QUANTA LX ACQUISITION, INC., a Delaware corporation QUANTA LXI ACQUISITION, INC., a Delaware corporation QUANTA LXII ACQUISITION, INC., a Delaware corporation QUANTA LXIII ACQUISITION, INC., a Delaware corporation QUANTA LXIV ACQUISITION, INC., a Delaware corporation QUANTA LXV ACQUISITION, INC., a Delaware corporation QUANTA LXVI ACQUISITION, INC., a Delaware corporation E-C-3 QUANTA LXVII ACQUISITION, INC., a Delaware corporation QUANTA LXVIII ACQUISITION, INC., a Delaware corporation QUANTA LXIX ACQUISITION, INC., a Delaware corporation QUANTA LXX ACQUISITION, INC., a Delaware corporation QUANTA LXXI ACQUISITION, INC., a Delaware corporation QUANTA LXXII ACQUISITION, INC., a Delaware corporation QUANTA LXXIII ACQUISITION, INC., a Delaware corporation QUANTA LXXIV ACQUISITION, INC., a Delaware corporation SYNERTEC INC., a South Carolina corporation By:_________________________________________ Brad Eastman, President or Vice President of each Additional Guarantor Address for Each Company: c/o Quanta Services, Inc. 1360 Post Oak Blvd., Suite 2100 Houston, TX 77056 Attn: General Counsel Fax No.: (713)629-7676 Phone No.: (713)629-7600 E-C-4 FORM OF ACKNOWLEDGMENT TO INTERCREDITOR AGREEMENT FOR ADDITIONAL NOTEHOLDERS Reference is hereby made to the Intercreditor Agreement dated as of March 23, 2000 (the "Agreement"), among Bank of America, N. A., as Agent for the Lenders party to the Credit Agreement referenced therein and Bank of America, N. A., as the Collateral Agent, and the Noteholders party thereto and certain other Parties, if any, thereto The undersigned has entered into a Supplement dated as of September 1, 2000 to the Note Agreement with Quanta Services, Inc. and desires that the additional series of Senior Notes issued thereunder be secured by the Security Documents and constitute Benefited Obligations under the Agreement. The undersigned has obtained the consent of the Collateral Agent under the Agreement and acknowledges the terms of the Agreement and agrees to be bound thereby. Terms not otherwise defined herein shall have the meaning set forth in the Agreement. Dated: September 1, 2000 [Name of Noteholder] _________________________________________ By:_________________________________________ Title:___________________________________ Date: ___________________________________ Notice Address: Acknowledged and Agreed: BANK OF AMERICA, N.A., as Collateral Agent By:_________________________________________ Title:___________________________________ Date: ___________________________________ QUANTA SERVICES, INC. By:_________________________________________ Title:___________________________________ Date: ___________________________________ (Other Obligors) By:_________________________________________ Title:___________________________________ Date: ___________________________________ EXHIBIT D (to Supplement)