Loading...
HomeMy WebLinkAboutContract 40720-CO2 DISTRIBUTION: wMTE-FILE CANARY-CONSTRUCTION FILE CITY OF FORT WORTH CITY SECRETARY � ll PINK-PROJECT MANAGER CHANGE ORDER REQUEST "i 0A0..rc GOLDENROD-CONTRACTOR CONTRACT NO.._. [PROJECT HANGE ORDER NO. TWO DATE: June 7,2011 D.O.E.NO.(N/A) PROJECT NO.00757 DESCRIPTION: NORTH AND SOUTH HOLLY WTP OZONE UPGRADE PROJECT CITY SECRETARY CONTRACT NO. 40720 ORIGINAL CONTRACT AMOUNT.......................................................$23.293.500 00 EXTRAS TO DATE........................................................$210.587.89 CREDITS TO DATE.......................................................S 0.00 CONTRACTCOST TO DATE........................................................................................................................................................................................5 23.504.087.89 AMOUNTOF PROPOSED CHANGE ORDER..............................................................................................................................................................5 301.536.00 REVISEDCONTRACT AMOUNT.................................................................................................................................. ...............................................5 23.805.623 89 ORIGINAL FUNDS AVAILABLE FOR CHANGE ORDERS........................................................................................................................................5 O t)Q�_ ADDITIONALFUNDING(IF NECESSARY)................................................................................................................................................................5 301.53_ 6.U0 REMAINING FUNDS AVAILABLE FOR CHANGE ORDER.............................. ........................................................................................................54,94_ IN ACCORDANCE WITH THIS CHANGE ORDER,THE CONTRACTOR SHALL: modify/change the contract as shown below to provide a complete,functional,and operational plant.These changes are as listed below.Further descriptions and cost breakdowns are attached. Change Order No.2 to the North and South Holly WTP Ozone Upgrade Project consist of the installation of liquid chlorine and ammonia piping placed adjacent to ozone and cooling water piping,used to convey chemicals from centralized storage and chemical feed facilities at the North Holly Plant to the South Holly Plant. Extra work includes installation of 5,460 linear feet of 12' diameter carrier pipe, 9,300 linear feet of liquid chlorine piping, 13,650 linear feet of liquid ammonia piping, along with fittings, valves,manholes,and vaults. NET1. PCM-04—Liquid Chlorine and Ammonia Piping.......................................................................................................................................................$301,536.00 CHANGE ORDER#2 AMOUNT............................................................................................................ ...........................................................$301,536.00 Staff has reviewed this change order and is in agreement with the scope of work and the costs associated with the work.Documentation providing additional information for the referenced change is attached to and made part of this change order. It is understood and agreed that the acceptance of this Change Order by the Contractor constitutes an accord and satisfaction and represents payment in full (both in time and money)for all costs arising out of,or incidental to,the Change Order. ORIGINAL CONTRACT TIME ADDITIONAL APPROVED TIME TO DATE I APPROVED CONTRACT TIME ADDITIONAL TIME FOR THIS CHANGE 715 Calendar Days TO DATE ORDER None 715 Calendar Da s 0 Calendar Da s CONTRACTOR DATE PROJECT MANAGER /"d/ /� _ / v (Jim R��C► DATE MANAGER/CONST.SER J . . / � ' DATE IN DIRECTO G E DATE � �!'✓ V DIRECTOR/CONTRACTING DEPT. DATE ` CITY O DATE CITY MANAGER DATE COUNCIL ACTION(IF REQUIRED): DATE 64�//� O APPROVED O DISAPPROVED 0 OTHER Attested by: -4)r F.;00000" d o - °�ad O RECD o �'ow40 RD Marty Hendrix ity S�twy v o 0 0 CITCRETARY*° odd C _a,q 28 aa �°"000.0 °a° 4y � RTIi, TX Contract Authorization i FORTWORTH May 11, 2011 Freese&Nichols, Inc. 4055 International Plaza, Suite 200 Fort Worth, Texas 76109 Attn.: Mr. G.E. Gay, P.E. North and South Holly'ATP Ozone Upgrade Project RE: PCM-04,Liquid Chlorine and Ammonia Piping Dear Mr. Gay: I have reviewed PCM-04, consisting of the extra work to install liquid chlorine and ammonia piping from the proposed centralized chlorine and ammonia storage and pumping facility at North Holly to designated locations at South Holly. This work is proposed to be performed as a change order to the Ozone Upgrade Project in order to take advantage of the cost savings associated with placing the chlorine and ammonia lines adjacent to the ozone and cooling water pipelines. In addition, a cost credit has been negotiated with the Ozone Contractor for the deletion of gaseous chlorine and ammonia piping and equipment proposed to be installed as part of the Ozone Upgrade project, which will not be required once the liquid chlorine and ammonia piping is installed. PCM-04 includes the purchase and installation of 5,460 linear feet of 12" diameter PVC carrier pipe, 9,300 linear feet of 1" diameter liquid chlorine piping, 13,650 linear feet of 3/4" diameter liquid ammonia piping, miscellaneous fittings and valves, along with 12 manholes and 8 vaults. The cost sheet provided by the Contractor provides both the quantity takeoff and unit prices for the various work activities. The Fort Worth Water Department concurs with the recommendation of Freese & Nichols to accept this contract modification, pending Fort Worth City Council authorization. Total cost for the proposed change amounts to $301,536.00 with no additional time requested. This change will be incorporated into Change Order #2 to the construction contract with Reynolds, Inc. Sincerely, Chris Harder, P. E. Engineer Xc: Project File WATER DEPARTMENT PRODUCTION DNISION THE Crrr OF FORT WORTH * 1511 11TH AVENUE * FORT WORTH, TEXAS 76102 (817) 871-8258 * FAX (817) 871-8410 M&C Review Page 1 of 2 Official site of the City of Fort Worth,Texas CITY COUNCIL AGENDA FORTWORTH COUNCIL ACTION: Approved on 61712011 DATE: 6/7/2011 REFERENCE NO.: **C-24939 LOG NAME: 60NORTH & S HOLLY OZONE CO2 CODE: C TYPE: CONSENT PUBLIC NO HEARING: SUBJECT: Authorize Execution of Change Order No. 2 in the Amount of$301,536.00 for a Total Contract Amount of$23,805,623.89 to City Secretary Contract No. 40720 with Reynolds, Inc., for Construction of the North and South Holly Ozone Upgrade Project, Located at 1500 11th Avenue (COUNCIL DISTRICT 9) RECOMMENDATION: It is recommended that the City Council authorize the City Manager to execute Change Order No. 2 to City Secretary Contract No. 40720 with Reynolds, Inc., in the amount of$301,536.00, thereby increasing the amount of the North and South Holly Ozone Upgrade Construction Contract to $23,805,623.89. DISCUSSION: On February 17, 2009, (M&C C-23356)the City Council authorized the City Manager to execute an engineering agreement with Freese & Nichols for the design of the Holly Ozone Upgrade Project. On July 27, 2010, (M&C C-24370)the City Council authorized the City Manager to execute a contract with Reynolds, Inc., in the amount of$23,293,500.00 for construction of the North and South Holly Ozone Upgrade Project. The North and South Holly Ozone Upgrade project includes the construction of a centralized ozone generation facility with cooling water and ozone gas pipelines running to the ozone contactors located at both the North and South Holly Water Plants. On November 9, 2010, (M&C C-24572) the City Council authorized the City Manager to execute an engineering agreement with Carollo Engineers, Inc., for the design of the North and South Holly Chlorine and Ammonia Conversion Project. This project will replace the gaseous chlorine and ammonia feed system with a liquid chlorine and ammonia feed system. This project is expected to bid in May 2011 with construction scheduled to begin in August 2011. Coordination of the liquid chlorine and ammonia feed systems with the centralized ozone generation facilities currently being constructed in the Ozone Upgrade Project is critical, as discussed in M&C C- 24828 (April 5, 2011). The centralized ozone generation facilities are to be located adjacent to the proposed centralized liquid chlorine and ammonia storage and feed facilities. In order to reduce future construction costs and to coordinate the projects, it is proposed by the Construction Manager, Freese& Nichols, Inc., to have the Ozone Upgrade construction contractor, Reynolds, Inc., install the liquid chlorine and ammonia lines adjacent to the ozone and cooling water lines, thus saving the cost of additional contractor mobilization, trenching, backfill and labor and creating a utility corridor more easily protected from damage from future construction activities. Change Order No. 2 o the North and South Holly Ozone Upgrade Project in the amount of$301,536.00 consists of the labor and materials necessary to install the liquid chlorine and ammonia lines adjacent to the ozone and cooling water lines. Staff considers the proposed change order amount to be fair and reasonable and recommends approval. M&C Review Page 2 of 2 M/WBE—Reynolds, Inc., is in compliance with the City's M/WBE ordinance by committing to an additional 16 percent M/WBE participation on this Change Order No. 2. The City's goal on this change order is 16 percent. The project is located at the North and South Holly Water Treatment Plants, 1500 11th Avenue, COUNCIL DISTRICT 9. FISCAL INFORMATION/CERTIFICATION: The Financial Management Services Director certifies that funds are available in the current capital budget, as appropriated, of the Water State Revolving Loan Fund. TO Fund/Account/Centers FROM Fund/Account/Centers P262 541200 609530075780 $301.536.00 Submitted for City Manager's Office by: Fernando Costa (6122) Originating Department Head: S. Frank Crumb (8207) Additional Information Contact: Chris Harder(8293) ATTACHMENTS 60North & S Holly Ozone CO2 Qdf Freese c111(l Nichols, Inc. Engineers Environmental Scientists Architects 4055 International Plaza, Suite 200 Fort Worth, Texas 76109 817 735-7300 817 735-7491 fax www.freese.com April 15, 2011 City of Fort Worth Water Engineering Department 1000 Throckmorton Street Fort Worth, Texas 76101 ATI'N: Mr. Chris Harder, P.E. RE: North& South Holly WTP Upgrade Ozonation Facilities Project No. 00757 F&N No. FTW 10112 PCM-004—Conversion From Gaseous Chlorine and Ammonia Piping Installation and Chemical Feed System Modifications Dear Mr. Harder: Transmitted herewith please find a copy of Reynolds, Ines. April 13, 2011 price proposal for the referenced extra work. The cost of the extra work is a$301,536.00. No change in Contract Time has been requested. The FWWD has been able to proceed with the North and South Holly WTPs Conversion From Gaseous Chlorine and Ammonia Project, Capital Project 1621. At the time of final design of the Holly Ozone Project, it was unknown if or when the conversion project would occur and gaseous chlorine and ammonia feed system improvements were included in the Ozone project. Due to the timing of the Ozone and Conversion projects, an opportunity exists to install a significant amount of liquid chlorine and ammonia piping in the common ditch between the North and South plants which is required as part of the Ozone project. Approximately 2,000 feet of new Conversion Project chemical feed tubing and casing system can be installed concurrent with the Ozone P%lect Piping,Providing an opportunity for significant overall cost savings. The major items of new work include: • Installation of 5,460 LF of 12"SDR-35 PVC casing pipe • Installation of 9,300 LF of 1"and 13,650 LF of%" Braided Pressure Hose for new liquid chlorine and ammonia feed to North and South Holly plant application points • Installation of 12 manholes and 8 vaults • Installation of chemical feed valves and piping in the manholes • Deletion of chlorine and ammonia work in the Ozone project which will not be required as liquid chlorine and ammonia will be used instead Mr.Chris Harder,P.E. PCM004 Holly Chlorine and Ammonia Improvements April 15,2011 The Conversion project is currently bidding and is expected to be substantially complete by April 2012. The South Holly plant will restart in April 2012 using ozone as its primary disinfectant and using liquid chlorine and ammonia for development of the chlorine residual required in the distribution system. We have reviewed this price proposal and are of the opinion that it is a fair and equitable price. We recommend the City accept this cost and issue a Change Order in the amount of$301,536.00. Please advise if the Water Department desires this PCM be incorporated in a Change Order. Sincerely, FREESE AND NICHOLS,INC. G. E. Gay,P.i Xc: David Sloan file FTW 10112.4.41.004 L.W0LLYWrFCHANGESWCMTCWM C12 NH3 Pips Mods 041311RBCMD IkfOLDS, INC. Layne Christensen Company April 13,2011 City of Fort Worth Water Engineering Department 1000 Throckmorton Street Fort Worth, TX 76101 Attn:Mr. Chris Harder, PE RE:North and South Holly WTP Upgrade Ozonation Facilities Capital Project No. 00757 Reynolds, Inc. Job No. 10062 PCM 004 Mr. Harder: Attached is our proposal for PCM 004. This is a change proposal for conversion from gaseous chlorine and ammonia piping installation and chemical feed system modifications per PCM 004 as issued by Engineer/Owner(attached). A detailed cost breakdown is also attached. Also attached is a breakdown of the M/WBE participation of 16%. PIease let us know if you have any additional comments. Regards, Heath Staffeld,PE, LEED AP Project Manager Reynolds, Inc. CC. - Mr. Ted Gay,PE (Freese and Nichols, Inc.) Reynolds, Inc. 15M 11*Ave Fort Worth, TX 70102 Phone:817-885.8205 Fax: 817-885.8517 r ed Contract Modification No. PCM-004 hange Order) Contract: North*SWth Holly WTP Unmde- Ozonption Facilities Prolcct Projccl No: 00737 Project Owner: City Of Fort Worth,Texas initiated by: '�Bngineer Project Engineer Q contractor FF'TL; &NkhoK.Lne XO%vner Contractor: Reynolds Inc. Jute: .tn onmt Attention: no tbtlowing chop 40MIAWt on lus project is pmpDs*L 1t Gr.'Q'V rw'yfcaat&UU bs afAmArd Fork 11=N not rom., es rerun!au kerfsed k..'Ilk-olf:VER. Description of the Proposed C:hangu: Change PMPWal for WIVV rsibn ftm gueous chlorine and amnwnia piping installn6h aad chemkol feed system modWcaalons per the Issued pCM4)04 datcd,121n0I 1,iinpt review comments for chlorine+system modifications,and 3"bzicktlb�v preventcr` veaks"�.ntoil,daled#111011, A detatiM cock brealcdoti�n and auinffiary is also attached. �M✓tYSF perticipmil"i form is.includtd as an attachment Robert LI'mery All shall br in aCrordnnce%vith the 14.7fNr,Stinulationa,and conditions of the ©Accepted ❑Rc}cctcd odglnel Contract Docmxnt L If the work hcrrin latw"fbr is Approved by Chanip onim die time orcompk-dou ivill be:. C) Inemood 13 mcn-,d t.3 Unchaaped r by 0,,,_calendar t. totttln ent u SY(ENGINl.htl) �} { g pen.atxrptana by April 22.2011 f This changa wiq:* JUM ❑ Deduct ❑Not Change t)A'1 is Conwomm O%%Wes Actioa: Total Addltionef f301,536:00 ❑Accepted. ❑Rejscicd (WENMAL CONTRACTOR BY(OWNER) zo�r DAVE DATF, ee �y • e 1 F 8$8$8 OOOOOOOOOOOOOOOO a OOOOOOOeo O Occom f' O O O O o 0 0 e .0 O cc O p O 2 w a .000.0.0000000000 O O O O O O O O O O cocoa 0000.... .0 • cc O O F IC L0 pt1'1 �j^I o a c } !a Coco, o O a O o O p e O No O O PO N O O O O gO p0 0000 00 a P ` 5 = ad 333113 goo z. O r 0 0 H g See '� �pFppppl= 00 w �t $$8$885$�¢858�$p$$$$y$� kids 8$$�$ 8 $$88 8888888 88 88 ^ ¢o dd$ $$ $$ d�`.o o^ooR oo gog0000 Oo de d m -Oo^oOOoOOOo.-OO All OgO N �. M$ ` O .. 000000 0o OO p a a g s o p o 0 0 e 0000 0000 2 s s o 0 ooe 0000000 00 ooe ooe 000000000 0000p o F W e 0 0 0 0 0 0000 0 O o 000 00000 o e 00000 oe oo• 000000000 OOOOe pe N 0 0 0 0 0 0000 e o e 000 0000 0 0 0 0o 0000 s oos s000000� ogfyp�g QQQQ����.. C:XX R if o • o o o o o 0000 e o o o0o 60000 o S 0000000 000 000 �y y0 0 0 0 0 0000 e o 0 ooe 0000 0 0 0 0000000 000 10000009POggoo$ 0 o e o e� ea88 li s d LU z 8$8$ 8$88 o 8 88 dd d 8888 8 d 8 d8888$8 88 9�888f ��?3��R888 oddd dodod d 8s4� o o o o O000 0 o oo '000 0 o o00000 00 91 �n!3it 41 Ul 255919 95 55555555559 9 s a s s A 000000000 . = 000000$o$�=��000000��00000 W o ri 000000000 �z 00000a000 . � # A � d W 888 g8g gg8 $$g 88g�9'i9Rg$ d88�$g'i844 W r M 7 W µl 0 0 z ddddddg$8888- dd d888X}88dd 0 0 0 0 0 8d8 s U. gal i g � s N ei f- O p N V 3W m a C LU LU 3 W6 O a Q N a � � G CL p h ca u � c � N m g C J L a ry E � a� a a 'o vl c � m Cl) Z c Li Z F o p > IL 3 c > O U t a O M c E o a c 7 c m > 40 c 'a o u a � � File 1PM101lV4.41/004 PROPOSED CONTRACT MODIFICATION 4.41/004 PROJECT:North & South Holly Upgrade Ozone Facilities PROJECT NUMBER OWNER: City of Fort Worth 00757 CONTRACTOR. Reynolds, Inc. CONSTRUCTION MANAGER: Freese and Nichols, Inc. FTW10112 PCM DESCRIPTION: Conversion From Gaseous Chlorine and Ammonia Piping Installation and Chemical Feed System Modifications PCM NO. 004 NOTIFICATION TO CONTRACTOR: The Owner proposes to make the additions, modifications or deletions to the Work described in the Contract Documents as shown in Attachment "A". We request that you take the following action within 10 calendar days: Notify us that you concur that this change does not require a change in Contract time or amount. A Field Order will be issued. X Submit a Price Proposal with detailed cost breakdown of labor, materials, equipment, all other cost related to this change and a revised schedule for performing the described change. Proceed with the change. Payment will be made at the unit price bid. Proceed with the change under the time and materials provisions of the Contract. Authorization to proceed with changes must be approved by Field Order or Change Order in accordance with the Contract Documents. By' Date: March 21, 2011 CONTRACTOR 4 REspWSE: We respond to your request as follows: �❑ We concur that this is a no cost or time change. Issue Field Order. We submit the attached Price Proposal with detailed cost breakdown and revised schedule for performing the described change. ❑ We are proceeding with the change at the unit price bid. ❑ We are proceeding with the change under the time and materials provisions of the Contract. '/ By: Date• W/ /// ACTION TAKEN: ❑ Proposed Contract Modification rejected. Contractor is hereby notified NOT to proceed: By' Date: ❑ Field Order issued: No. Date: By: ❑ Change Order issued: No. Date: By: 1 Fil• E'P aul .1.I 001 PROPOSED CONTRACT MODIFICATION PCM-004 ATTACHMENT A PROJECT:North & South Holl Upgrade Ozonation Facilities PROJECT NUMBER OWNER: Ci�y yr Tort Worth CONTRACTOR: Reynolds, inc. 00757 CONSTRUCTION MANAGER: Freese and Nichols, Inc. FTW10112 PCM DESCRIPTION: Conversion From Gaseous Chlorine and Ammonia Piping Installation and Chemical Feed System Modifications PCM NO. 004 The Owner proposes to make the following additions, modifications or deletions to the work described in the Contract Documents. Authorization to proceed with these changes must be approved by Field Order or Change Order in accordance with the Contract Documents, RE: The FWWD will modify the chlorine and ammonia feed systems at the North and South Holly Water Treatment Plants in the fall of 2011 and spring of 2012. To support these changes, addition of liquid chlorine and ammonia chemical feed piping between the North and South Plants concurrently with the Ozonation Project's ozone gas and spent cooling water return pipelines between the plants is necessary. Modifications to the chlorine and ammonia chemical feed improvements in the Ozonation Project are also required. 1. Add liquid chlorine and ammonia material specifications, 3 pages, attached. 2. Add Sheets 1-6, attached, showing the new liquid chlorine and ammonia piping system installation. 3. Section 01030.3.02.B.1.d (Phase 4); Delete - Modify SH chlorinators and ammoniators. Add - Install PCM004 liquid chlorine and ammonia improvements. Coordinate restart of South Holly plant with substantial completion of Conversion From Gaseous Chlorine and Ammonia project. 4. Sheets 3YP1, 3YP12; Revise alignment of 12-DI-OCWR, 4-SS-OZ, and 4-SS-GOX pipe between Ozone Generation Building and LOX Storage Area, see Sht 1 of 6. 5. Sheet 3YP4; Change 1-BS-AG to 1-PVC-AG from inside the North Holly Chemical Building Basement to North Holly Ozone Contactor Raw Water inlet box. Do not reinstall gaseous chlorine and ammonia equipment in the valve pit feeding Raw Water #2 application points. 6. Sheet 3YP14, 2 Pipes and 3 or More Pipes Trench Detail; Delete 4" Class E concrete cap above grade. 7. Sheet 3YP17 & 18; Change 3-PVC-CLS to 1-PVC-CLS. 8. Sheet 3YP19; Delete new 4000 ppd chlorine ejector. Install 4000 ppd ejector provided by FWWD. 9. Sheets 4P1, 4P3, 05, 4P6, and 4P8; Change 1-BS-AG to 1-PVC-AG. Change 1-SS-AG to 1-PVC-AG. 10. Sheet 10YP3 and 12P1; Delete 1-BS-AG from Chlorine Building to SH Ozone Contactor. 11. Sheets 10YP9, 10YP19, and 10YP20; Delete installation of 3-PVC-CLS, 1-BS-AG, and 3-S-UW pipelines. Delete installation of 3" backflow preventer. Delete installation of second chlorine gas ejector. Remove 3-PVC-POT as shown on Section 1/10YP20 and install 3" blind flange at 8" tee. 12. Sheets 10YP19 and 10YP2020; Change 3" Chlorine Solution Injector taps to 12 flanged outlets with blind flanges in east and west vaults, delete tap at 60" exit from filter building. Change 1" Ammonia Injectors to 12" flanged outlets with blind flanges. 13. Sheet 10YP17; Delete modifications to Chlorine and Ammonia Process Diagrams. 14. Sheets 12P7, 12P8, and 12P9; Change 1-BS-AG to 1-PVC-AG. Change 1-SS-AG to 1- PVC-AG. 15. Revise your record drawings as appropriate. By: Date: March 21, 2011 2 I . • ..�.• .... CITY OF FORT WORTH ••� o.r�/)�/ NORTH AND SOUTH HOLLY WTP OZONATION FACILITIES PROJECT PCM-004: CONVERSION FROM GASEOUS CHLORINE AND AMMONIA PIPING INSTALLATION Summary of Specification Changes and Materials Required for Change Order: _RM SECTION A. Special Conditions Part B In Article�28 Trench change the specification reference from'01665'to Section '02220'in the first sentence. B. Identification Systems 01080 Notes:Provide pipe identification on each pipe in each valve box and manhole.Use the abbreviations'SHC'and'LAS'for sodium hypochlorite and liquid ammonium sulfate piping, respectively,with black lettering on yellow background.Indicate the application point on each tube in each valve box and manhole in accordance with Table 2 on Sheet 3 of 6. C. Quality Control 01400 Notes:Perform pressure testing for sodium hypochlorite and liquid ammonium sulfate piping per the requirements in Section 15956. D. Excavation and Backfill for Piping 02203 Notes:No comments. E. Trench Safety 02220 Notes:No comments. F. Earth Fill Classifications 02255 Notes:No comments. G. Aggregate Fill Classifications 02256 Notes:NO comments. H. Structural Excavation and Backfili 02300 Notes:No comments. I. Preformed Channel Pipe Support System 15062 Pap iof3 Notes:Provide all non-metallic pipe supports with 316 stainless steel hardware throughout for pipe support system in valve boxes. J. Ductile Iron Pipe and Fittings(Underground) 15063 Notes:Use mechanically-restrained Joints for thrust restraint. K. PVC Ball Valves 15111.2.03 Notes:No comments. L. Diaphragm Valves 15117.2.07 Notes:Spears excluded as a supplier because of lack of travel stops.Modify 2.07 in 15117 as follows: a. 2.07.8.2,Diaphragm Materials(For sodium hypochlorite service):3 diaphragm layers, Teflon(PTFE),PVDF,and ethylene-propylenedlene(EPDM)or Viton backing cushion. b. 2.07.B.10,End Connector Seal(For sodium hypochlorite service):Hypalon 1/8-Inch thick gaskets. M. PVC Pipe a. PVC Gravity Sewer Pipe 15265.2.04 Notes:Provide pipe with a wall thickness of SDR 35.Provide penetration into Precast Concrete UtiNty Structures using detail shown on plans.Perform mandrel test but don't wait 30 days after placement to perform test. b. PVC Pipe,Schedule 80 15265.2.02 Notes:Utilize proper primer and cement for chemical service as specified. N. Piping Systems Testing 15956 a. Sodium Hypochlorite and LAS: Notes:Perform the'High-Head Pressure Test'for the sodium hypochlorite and liquid ammonium sulfate piping/tubing systems.Perform pressure test at 100 psig.Test tubing installed between each box prior to installing tubing to subsequent boxes. b. PVC SDR-35 Notes:Perform the'Gravity Method Test'for the PVC SDR-35 Casing pipe.Perform test at 10 psig 0. Braided PVC Tubing with fittings and 316 SS clamps None Requirements:Provide braid-reinforced PVC tubing with inside diameters as shown on the plans.Provide tubing that complies with NSF 61. Provide lengths of tubing so that no fittings will be required between the valve boxes. Provide tubing with a minimum pressure rating of 140 psig at a temperature of 73 degrees F.Provide tubing that is compatible with both 15%sodium hypochlorite and 38%liquid ammonium sulfate.Provide fittings to transition from hose to Schedule 80 PVC pipe as shown on plans.Tubing to be Installed in casing pipe shall be straight in nature when laid out flat prior to installation.Contractor shall straighten tubing as needed by a Page 2 of 3 method recommended by tube manufacturer prior to installation.Contractor shall take care in installing(pulling)tubing though casing pipes to prevent twisting,kinking,and shifting of tubing within the casing pipe.Allow Engineer to Inspect tubing prior to and during installation.Pulled tubing that is not straight,kinked,or has twisted and shifted may be required to be removed and reinstalled,as determined by Engineer. Uniquely label both ends of tubing prior to installation. P. Precast Concrete Valve Boxes None Requirements:Precast boxes manufacturer shall hold a current Plant Certification by the National Precast Concrete Association. Provide boxes with the Inside dimensions shown on the drawings.Construct boxes in accordance with ASTM C858—Underground Precast Concrete Utility Structures.Design the boxes for complete insertion Into soil and for H-20 loading within 3 feet of any wall.Submit design calculations sealed by a Texas structural or civil engineer.Submit shop drawings showing all dimensions of the boxes and the reinforcing steel sizing and spacing. Submit concrete mix design and tests for compressive strength of concrete in accordance with ASTM C858. Provide additional reinforcement around each 8-inch or greater pipe penetration in accordance with Typical Detail 5180.Construct boxes with Class A or Class C concrete as specified in Section 03300.Overexcavate a minimum of 6 inches below bottom of concrete boxes and 12 inches beyond edge of walls.Backfill with Structural Earth Backfill as specified in Section 02300 compacted to 95%density.Place fill In 8-Inch lifts to the bottom of the concrete boxes.Backfill around boxes to grade in accordance with Section 02300. Q. Degassing Valves None Requirements:Provide degassing valves at locations shown on plans.Construct degassing valves from thermoplastic and eiastomer materials only and that are resist to sodium hypochiorite attack. Provide degassing valves suitable for a pipe working pressure of up to 100 psig. Degassing valves shall be Plast-0-Matic Series DGV with no or equal. Page 3 of 3 a . . o � ❑ w o � 0 b = o ZI U w - - -- - - - ---------- ------ r I I x 0 o" 38 � is w � N iv.lY 1D11.� S t I ' j :: 4D 4D ap 4D I, 4D � o oo• 000 ■ MIN �u�eio qg gg ; e a 0 00 00 00 11111 1111111031 33333 33333 33399 33 333 33 3�3�t� � fill fill 11 It It II �— --- ------------i rarr MINI SINN d3 Mr XM x I I L444 LL44 444E 4L L4 4L 4 I s II II II I I I II III I I a I I � I 1L-- 11_C I � a � o m � O� V � L Mfg M Yv"-lfl Y ® ygl/�i11 C Y LI1f L t i E E Fvr � bt= 014 f as 00000 � it J � E will €$° till 5 ;E _ k€ ft� ti� W 4 I I I I � Chi ite 4 l I I I I a� i I i I I I I I I O 4 I I I I i I I A k j• k 2 9 !4 N Y C pL q� ago vrw Ir dE : 4 1 4 a Jim Is I � �po . L fit � .3 j k k fill 00 00 O W 4 � r � V .Yb.. Y @iYM pN �q HI ® off �. t E 'E t 3 D be 6 i= • rt fill s jig p b R z � rY f- i if of E ; R i' INZ r� u 1 rlt a .. i t- te i w t• n- rw .� i