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Ordinance No. 3,51521122 -5 ORDINANCE NO. 3515 AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF BAYTOWN AUTHORIZING CHANGE ORDER NO. 5 TO THE CONTRACT WITH NAYLOR INDUSTRIES, INC. FOR REHABI- LITATION OF THE WEST DISTRICT SEWAGE COLLECTION SYSTEM SEWER LINE GROUTING AND MANHOLE REPAIR. BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF BAYTOWN, TEXAS: Section 1: That the City Council does hereby authorize Change Order No. 5 to the contract with Naylor Industries, Inc., for the rehabilitation of the West District Sewer Collection System Sewer Line Grouting and Manhole Repair. A copy of said change order is attached hereto marked "Exhibit A ", and made a part hereof for all intents and purposes. Section 2: This ordinance shall take effect from and after the date of its passage. INTRODUCED, READ, and PASSED by the affirmative vote of the City Council of the City of Baytown, on this the 22nd day of November , 1982. 'EMMETT 0. HU TO, Mayor ATTEST: EILEEN P. HALL,�City Clerk APPROVED: RANDALL B. STRONG, City torney CHANGE ORDER NO. 5 21122 -5a November 5, 1982 Mayor Emmett 0. Hutto and City Council City of Baytown P.O. Box 424 Baytown, Texas 77520 Subject: Request for Approval of Rates on Labor and /or Materials and /or Equipment and /or Extension of Time. Project: Rehabilitation of West District Sewage Collection System Sewer Line Grouting and Manhole Repair, Job No. 044 -15, Contract No. 2 Contractor: Naylor Industries, Inc. Original Contract Amount: $307,209.30 Honorable Mayor and City Council: Your approval is requested on the following items which reflect project (underruns) and /or overruns. These added costs or deductions will be applied to the contract. The items listed below represent a change in scope of work to sewer segments which were not conducive to rehabilitation by methods proposed in the original 1976 West District SSSES. The change in scope of work and new cost effective analysis by line segment is included in Attachment 1 to this "Change Order ". The following Special Provisions to the Specifications, new specification Items and Revised Plans are hereby made a part of this contract and attached hereto: EpIRIBIT A 1 21122 -5b Special Provision No. 2 to Item No. L329 dated November 3, 1982. Special Provision No. 1 to Item No. L330 dated November 3, 1982. Technical Specification Item No. L330 Sliplining of Existing Sanitary Sewers dated May 16, 1979. Special Provision No. 1 to Item No. L342 dated November 3, 1982. Revised Sheet 2 of 14 Revision dated November 3, 1982. Revised Sheet 3 of 14 Revision dated November 3, 1982 Revised Sheet 4 of 14 Revision dated November 3, 1982. Revised Sheet 10 of 14 Revision dated November 3, 1982. Revised Sheet 11 of 14 Revision dated November 3, 1982. Revised Sheet 12 of 14 Revision dated November 3, 1982. A. WORK DELETED FROM ORIGINAL CONTRACT: Bid Form Unit Unit Item Approx. of Price Add. No. Qty. Measure Description ($) (Ded.) Cost 1 1000 L.F. Cleaning 6" Sewer Pipe 1.25 ( -) 2 2000 L.F. Cleaning 8" & 10" Sewer Pipe 1.31 ( -) 4 (- $1,250.00) (- $2,620.00) 21122 -5c A. WORK DELETED FROM ORIGINAL CONTRACT: (Cont'd.) Bid Form Unit Unit Item Approx. of Price Add. No. Qty. Measure Description ($} (Ded.) Cost 3 1000 L.F. Cleaning 12" & 15" Sewer Pipe 1.47 { -) ( -$ 1,470.00) 4 3000 L.F. Closed Circuit T.V. Inspection of 6" Sewer Pipe Includ. Inspec- tion Record .54 ( -} ( -$ 1,620.00) 5 1000 L.F. Closed Circuit T.V. Inspection of 8 " &10" Sewer Pipe Includ. Inspection Record .48 { -} ( -$ 480.00) 6 1000 L.F. Closed Circuit T.V. Inspection of 12 " &15" Sewer Pipe Includ. Inspection Record .48 ( -) ( -$ 480.00) 8 2900 Ea. Internal Pressure Test of Joints, 6" Sewer Pipe 3.02 { -) ( -$ 8,758.00) 11 1950 Ea. Grout Joints, 6" Sewer Pipe and Retest 7.23 ( -) (- $14,098.50) 12 1300 Ea. Grout Joints, 8" & 10" Sewer Pipe and Retest 13.03 ( -) (- $16,939.00) 13 600 Ea. Grout Joints, 12" & 15" Sewer Pipe and Retest 23.39 ( -) (- $14,034.00) Sub -Total Work Deleted { -) (- $61,749.50) 3 21122 -5d B. WORK ADDED TO ORIGINAL CONTRACT: Bid Form Unit Unit Item Approx. of Price Add. No. Qty. Measure Description ($} (Ded.) Cost 46 6129 L.F. S.L. Exist. 6" Sanitary Sewer w/5.375" (SDR- 26.0) as per Plans & Spec. Comp. in Place 8.95 + $54,854.55 47 102 L.F. S.L. Exist. 10" Sanitary Sewer w/8.625" (SDR- 26.0) as per Plans & Spec. Comp. in Place 29.50 + $ 3,009.00 48 23 Ea. Point Repair to 6 " &10" Sanitary. Sewer Pipe for Obstruc. Removal in Relationship to S.L., 0 -8' Deep Comp. in Place 300.00 + $ 6,900.00 49 8 Ea. Point Repair to 6 " &10" Sanitary Sewer Pipe for Obstruc. Removal in Relationship to S.L., over 8' Deep, Comp. in Place 400.00 + $ 3,200.00 Sub -Total Additional Work + $ 67,963.55 Less Deduction for Work Deleted (- 61,749.50) Net Additional Cost: Change Order No. 5 + $ 6,214.05 Original Contract Amount 307,209.30 REVISED CONTRACT AMOUNT: $313,423.35 Note: S.L. Stands for Slipline Obstruc. Stands for Obstruction 4 21122 --5e This represents an increase of 2.023% in the original contract amount. Contract Calendar Days 200 days Approved Time Extensions (.Change Orders 1 thru 4) 8 days Time used thru Sept. 9, 1982 (Work Suspended pending approval of Change Order 5) 179 days Time Remaining Prior to Change Ordr 5 ' 29 days Time Extention for Change Order 5 65 days Total Contract Time Remaining 94 days Revised Completion Date: To be established after Change Order No. 5 Approval. No other conditions or covenant of the contract is changed, waived or altered except as expressly setforth herein. Recommended For Approval: Accepted: LANGFORD ENGINEERING, INC. NAYLOR INDUSTRIES, INC. B B Y' . Y' . J eV Nash Manager of Pi Id ervices Date: 82 Date: % APPROVED: CITY OF BAYTOWN By: Mayor Emmett O. Hutto Date: Attachments JKD /jl 5 21122 -5f 044 -15 #2 Nov. 3, 1982 SPECIAL PROVISION NO. 2 TO ITEM NO. L329 Paragraph I.2. is hereby revised by adding the following sentence: "The Owner shall pay for cleaning the entire length of each line segment only once. Any additional recleaning required just prior to sliplining or other rehabilitation methods shall be included in the contract price bid for items of which it is a component ". Paragraph 1.3 is hereby revised by adding the following sentence: "The Owner shall pay for televising the entire length of each line segment only once. Any additional re- televising required just prior to sliplining or other rehabilitation methods shall be included in contract price bid for items of which it is a component ". Spec. Prov. No. 2 to Item No. L -329 1/1 044 -15 #2 11/3/82 SPECIAL PROVISION NO. 1 TO ITEM NO. L 330 21122 -5g 1. For this project Paragraph "B. Materials" shall be replaced as follows: B. Materials: The liner and fittings to be sliplined into the existing sewers 6 -inchs and larger shall be of a polyethy- lene material and the resin from which the pipe is extruded shall meet or exceed the requirements of Type II, Class C, Grade P -34, Category 5 - conforming to ASTM D -1248 and ASTM D -3350, latest revisions, and have the PPI recommended designation PE 3406. The liner and fittings to be sliplined into the existing sewers six inches and larger shall conform to ASTM D --2122 and shall be in the following sizes: I.D. of O.D. of Minimum Existing Sewer Liner Pipe Wall (Inches) (Inches) SDR Thickness 6 5.375 32.5 .166 8 6.625 26 .255 10 8.625 26 .332 12 10.750 26 .414 15 13.380 26 .515 18 16.000 26 .616 2. For this project Section C.1 shall be replaced as follows: C.1 Pumping: The Contractor shall provide by -pass pumping in accordance with Item L340 of these specifications. 3. For this project Section C.7 Manhole Replacement shall be replaced as follows: C.7 Manhole Replacement: In those places where the main access shaft is excavated at an existing manhole, the manhole will be replaced with new manhole conforming to Sepcification Item No. L321. Where new manholes are not required at the access shaft locations, the line will be encased as specified before backfilling. 4. Delete "at legal dump site" in Paragraph F.1. Spec. Prov. No. 1 to Item No. L330 1/2 21122 -5h 044 -15 #2 Rev. 11/3/82 5. Delete Paragraph F.I. "Cleaning of Sanitary Sewers" and replace with the following: F. Measurement and Payment: 1. Cleaning of Sanitary Sewers: Payment for cleaning of sanitary sewers shall be in accordance with Item L -329. 6. For this project Paragraph F. Measurement and Payment: Shall be amended by adding the following: "F. Measurement and Payment: 5. Obstruction Removal: Payment for a point repair necessary for an obstruction removal shall be in accordance with Item L- 342 ". Spec. Prov. No. 1 to Item No. L330 2/2 Std. 5/16/79 21122 -5i ITEM NO. L330 - SLIP--LINING OF EXISTING SANITARY SEWERS A: General: This item shall govern for slip - lining of existing sanitary sewers for the purpose of restoring these lines to an acceptable usable condition. Such slip -- lining shall be constructed in accordance with this item. B. Materials: The liner and fittings to be slip -lined into the existing sewers 8- inches and larger shall be of a polyethylene material and the resin from which the pipe is extruded shall meet or exceed the requirements of a Type III,'Class C, Grade P -34 Category 5 - and have a cell classification of 335433C by ASTM D -1248 and ASTM D- -3350, latest revisions, and have the PPI recom- mended designation PE3406. The liner and fittings to be slip -lined into the existing sanitary sewers eight inches and larger shall be in the following sizes: Liner Pipe Pain. Wall Existing Sewers Nominal O.D. Thickness (Inches) (Inches) (Inches) 811 6'r .197 10" 8" .244 12" 10" .306 15" 12" .385 18" 16" .488 21" 18" .720 24" 20" .791 24" 22 ". 1.050 (SDR -21) C. Installation Procedures: 1. Pumping: The Contractor will be required to furnish pumping equipment in order to accomplish this work and to main- tain continuous wastewater flow. 2. Line Obstructions: It will be necessary for the Contractor to clear the lanes, that are to receive plastic liner, of any debris and protruding service connections that might prevent the entry of the liner. The equipment and methods selected by the Contractor to clean the sanitary lines prior to slip - lining will be subject to approval by Engineer. L330 - 1/4 Std. 5/16/79 211.22 -5j All debris taken from the sewers shall be properly disposed of by the Contractor and the cost for this item shall be included in price bid for cleaning of sewer lines. The Contractor's attention is directed to the fact that portions of these sewers may be in very poor condition at the top of the sewer. It will be necessary that the Contractor exercise extreme caution at these locations during the slip lining operation to prevent further damage and in order to keep the sewers in service. 3. Excavation and Backfilling: Excavation will be required at each building service connection to expose the existing connec- tion and permit the working space required for reconnecting the building service lead to the new plastic liner pipe. Access shaft excavations will also be required at intermediate manholes, or other intermediate points, where the liner pipe will be "fed" into the existing sewer. When at all possible, these intermediate access shaft excavations should coincide with building service connection excavations, or critical deviations in line or grade. Where excavations for insertion of the polyethylene liner are made in a line section between two manholes, the polyethylene pipe will be joined together with a circle seal clamp or a.stain- less steel full encirclement clamp. Minimum clamp lengths for each liner size are as follows: Polyethylene Liner Nominal Size (inches) 5 6 XS 22 Minimum Length of Clamp (inches) 10 15 30 30 On all excavations where the polyethylene pipe has been exposed, there shall be placed, prior to backfilling, a bedding below the pipe and encasement around and above the pipe of a minimum thick- ness of 12 inches, using cement stabilized sand. Before any excavation is done for any purpose, it will be the responsibility of the contractor to check with the various utility companies and determine the location of their facilities. Any necessary temp- orary constructicn right- of- -s:,ay and /or storage areas will-be arranged for by the contractor. Access shafts and point repairs under flexible base streets (asphalt) shall be backfilled and tamped to standard 95% Proctor. Backfill for a distance of 6 feet from the pavement edge of both asphaltic and Portland cement concrete pavements shall be tamped to standard 95% Proctor. Backfill under concrete streets will be cement stabilized sand. Backfill placement shall not begin until approval has been given by the Engineer. L330 - 2/4 Std. 5/16/79 21122 -5k 4. Pi e Jointing: Sections of plastic liner pipe shall be assembled and joined on the site, above ground. Jointing shall be by the heating and butt - fusion method and in strict conformance with the manufacturer's recommendations. 5. Insertion of Liner: After completing the access shaft excavation, the top of the existing sewer, down to the spring line, shall be removed for the full length of the access shaft. A power winch shall then be connected to the end of the liner by use of a pulling head so that the liner can be fed into the existing sewer. Some type of bumper shall be provided in order to prevent the ragged edges of the broken out sewer pipe from scoring the outside of the liner as it is pulled into the pipe. Precautions shall be taken not to damage the liner or break any. of the joints. Sufficient time shall be allowed for pipe to return to normal length (over - elongation due to higher temperature at installation) based upon average temperature in the sewer. 6. House Service Connections: After the liner has been pulled into place and secured in the manhole walls, each existing service connection, as directed by the Engineer, shall be reconnected to the new liner. A portion of the existing sewer around each service connection shall be removed to expose the liner pipe, and provide sufficient working space for making the new service connection. Service laterals shall be connected by the use of a prefabricated polyethylene saddle or equal. The polyethylene saddle shall be a two piece saddle equipped with neoprene gaskets so that a complete seal is accomplished when the two piece saddle is placed around the polyethylene pipe and pulled together with four stainless steel bands. 'The stub -out attached to the saddle must protrude into the polyethylene liner a distance equal to the wall thickness of the polyethylene liner in place. The stub -out shall then be attached to the service lateral with a suitable fitting of the banded coupling type conforming to ASTM C594. The fitting shall be secured to the service lateral and polyethylene stub -out with stainless steel bands. The entire service connection shall be encased with a one -foot cover of cement stabilized sand backfill. The price bid for reconnecting service lines shall be full compensation for all labor, materials and equipment necessary to accomplish the work including backfilling. 7. Manhole Re lacement: In those places where the main access shaft is excavated at an existing manhole, the manhole will be re- placed with new manhole conforming to Specification item No. L303. Where new manholes are not required at the access shaft locations, the line will be encased as specified before back-filling. L330 - 3/4 Std. 5/16/79 21122 -51 8. Sealinq Pol eth lene Pipe in Manholes: The annular space between the polyethylene liner and existing sewer line must be sealed where the sewer line enters or exits each manhole. The annular space may be sealed with chemical seal. The chosen method must be approved by the Engineer. D. Cleanup Operations: All materials not used in the backfilling operation shall be disposed of offsite by the contractor. Finish grading shall be as required and in locations other than in street rights -of-ways the surface shall be graded smooth, suitable for planting grass. E. Air Testing: Due to the fact that this sewer system is in operation and must be kept in operation, the Contractor will not be required to test the liner after installation. However, in the event that poor workmanship is evident in the jointing of the sec- tions of liner, the Engineer, at his option, may require the liner to be tested before insertion in the existing sewer. 1. The low pressure air test shall be performed with AIR -LOC equipment manufactured by Cherne Industrial, Inc., Hopkins, Minnesota, or equal, and shall be conducted under the supervision of the Engineer. F. Measurement and Payment: 1. Cleaning of Sanitary Sewers: The unit price bid for cleaning of sanitary sewers shall be full compensation for all labor and equipment required to clean, prior to slip-lining all sewer lines in this project, including collection, transportation and disposal of sand and debris from the sewers at a legal dump site. 2. Slip- Lining: The unit price bid for slip- lining the sewer lines shall be full compensation for all materials, labor and equipment required to complete this project as per plans and spec- ifications. Included in the unit bid price for slip - lining shall be the cost for excavation and backfilling of access shafts, except in the case when a shaft is excavated in a paved street in which case payment items (removal and replacement of concrete base and surface, and special backfill) are provided separately. 3. Reconnection of Service Lines: The unit price bid for recon- nection of 6" or all other house or building service lines shall be full compensation for all materials, labor, and equipment necessary to locate and make these connections. Any number of houses or buildings discharging into a common point of the sewer line is counted as one and only one house connection. There will be no sep- arate payment for manhole replacement. 4. Street Surface: The street surface repairs where required for liner's access shafts and house or building service line re- connections shall be paid for at the unit prices bid for base and surface. L330 -- 4/4 044 -15 #2 11/3/$2 SPECIAL PROVISION NO. 1 TO ITEM NO. L342 21122 -5m 1. For this project Paragraph N.l. "Payment: Dry Point Repair" shall be replaced with the following: I. Dry Point Repair: a. Dry Point Repair in Accordance with Paragraph B.l: A dry point repair shall be paid for at the unit price bid per each for all repairs necessary within a 12' section, according to the size and depth of pipe including repair of sewer service connections if necessary where the existing carrier pipe is required to be replaced. b. Dry Point Repair in Accordance with Paragraph B.2: A dry point repair shall be paid for at the unit price bid per each for all repairs necessary within a 12' section, according to the size and depth of pipe including repair of sewer service connections if necessary where the existing carrier pipe is not required to be replaced, and the line is scheduled for sliplining. This repair will be termed "Obstruction Removal" in the Bid Proposal Item. Spec. Prov. 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