B01 Attachment 01 Statement of Work.pdf

Scope of Work

Zuni Wastewater Treatment Improvements

IHS Project No. AL-17-A77

Pueblo of Zuni

Zuni, NM

FEBRUARY 2020

Indian Health Service

Division of Sanitation Facilities Construction

Albuquerque Service Unit

SCOPE OF WORK

ZUNI WASTEWATER TREATMENT IMPROVEMENTS PROJECT

PUEBLO OF ZUNI

ZUNI, NEW MEXICO

PROJECT NO. AL-17-A77

I. EXECUTIVE SUMMARY

The Indian Health Service (IHS) has determined a need for the expansion and renovation of the facultative wastewater lagoon on the Zuni Indian Reservation. The work under this contract is part of the detailed design to construct these facilities. The Contractor shall construct the facilities in accordance with the scope of work and all referenced specifications and drawings.

II. LOCATION OF WORK

Work included under this contract will be executed in the Pueblo of Zuni on the Zuni Indian Reservation in McKinley County, New Mexico. The Pueblo of Zuni is located approximately 152 miles west of Albuquerque, New Mexico.

III. SCOPE OF WORK

In accordance with the Project Manual, Construction Drawings, and the August 2016 AAIHS/OEHE SFC Technical Provisions, or as amended or added by the supplemental technical provisions, the Contractor shall furnish all labor, materials and equipment for the construction of an improved wastewater lagoon treatment facility. Through a two-phase construction approach, the existing 32.6-acre, six cell lagoon facility will be renovated and expanded to a 49-acre, five (5) cell treatment system. In general, Work to be performed under this Contract includes, but is not limited to:

Phase 1 will expand one of the existing cells by 16.8 acres to construct a new 21.6 acre primary treatment cell (Cell 1). Construction of the new treatment Cell 1 shall include all necessary earthwork and the installation of all prescribed piping structures and other prescribed appurtenances, including but not limited to:

Installation of a 16-foot deep inflow-receiving fermentation pit featuring a new inlet piping structure.

Installation of one (1) new transferring piping structure to accomplish the intended treatment train.

Installation of new discharge piping.

Installation of approximately 480 linear feet of 18-inch PVC gravity sewer pipe to convey discharge flows from the new Cell 1 to the existing gravity sewer pipe and lift station. Installation of approximately 480 linear feet of new 18-inch PVC gravity sewer pipe. The new pipe shall extend from the outlet of new Cell No. 1 and connect to the existing 18-inch PVC gravity sewer pipe at the location indicated in the Construction Drawings.

Installation of HDPE liner with air / gas vents and anchor trenching throughout the new primary treatment chamber.

Construction and surface preparation of the top-of-berm access roads.

The other five (5) existing cells shall be kept in operation while the phase 1 improvements are under construction.

Phase 2 will reconfigure and rehabilitate the other existing treatment cells to construct new treatment Cells 2, 3, 4, and 5. Reconfiguration and rehabilitation efforts shall include all necessary earthwork and the installation of all prescribed piping structures and other appurtenances, including but not limited to the:

Installation of five (5) new transferring piping structures to accomplish the intended treatment train.

Installation of a new inlet piping structure.

Installation of a new discharge structure and piping.

Installation of the HDPE liner with air/gas vents and anchor trenching through the prepared cells.

Construction and surface preparation of the top-of-berm access roads.

The primary treatment chamber (Cell 1) constructed under Phase I will be kept in operation while the phase 2 improvements are under construction.

Extracted bio solids are to be adequately mixed with the excess natural (clean), excavated material. The mixed material shall be stockpiled at the designated spoil location.

Installation of approximately 3,360 square yards of rip-rap with geotextile underlayment on the eastern and southern exterior embankments.

Installation of approximately 7,060 linear feet of 6-foot high chain link fencing around the newly constructed lagoon facility. Perimeter fencing shall include (2) 14-foot wide, double-door access gates.

Installation of a new dual-channel ultrasonic wastewater flow meter in the existing valve pit at the Lagoon Lift Station. The existing electromagnetic (in-line) flow meter shall be removed from the meter vault and replaced with new force main piping.

All other work stated on the Construction Drawings, but not necessarily listed herein. The Contractor shall be responsible for estimating cut and fill quantities and other earth work quantities.

IV. TECHNICAL SPECIFICATIONS

1. Standard Technical Provisions (attached): The following sections of the

Albuquerque Area-Indian Health Service/Office of Environmental Health and

Engineering AAIHS/OEHE)-Sanitation Facilities Construction (SFC) Technical

Provisions, February 2016 edition are incorporated by reference. The provisions are the same as if fully written herein and shall govern this Project except where revised, updated, or supplemented by the Supplemental Technical Provisions.

SECTION 01 TRENCH EXCAVATION & BACKFILL FOR PIPELINES

AND APPURTENANT STRUCTURES

SECTION 02 CONCRETE

SECTION 03 REINFORCING STEEL

SECTION 06 GRAVITY SANITARY SEWERS

SECTION 11 ROADWAY, RAILROAD, AND SPECIAL UTILITY

CROSSINGS

SECTION 40 SEWAGE TREATMENT LAGOON

CONSTRUCTION

SECTION 42 SEWAGE LIFT STATION

SECTION 43 SEWER FORCE MAINS

SECTION 60 CHAIN LINK FENCING

2. Supplemental Technical Provisions (Index followed by detailed provisions):

STP 1.0 PRECONSTRUCTION CONFERENCE

STP 2.0 PROTECTION OF SITE, MOVING FENCES & MINOR

STRUCTURES

STP 3.0 TRIBAL RESOURCES

STP 4.0 ZUNI TERO & TAXATION COMPLIANCE

STP 5.0 PERTAINING TO SECTION 06 – GRAVITY SANITARY

STP 6.0 PERTAINING TO SECTION 40 – SEWAGE TREATMENT

LAGOON CONSTRUCTION

STP 7.0 PERTAINING TO SECTION 42 – SEWAGE LIFT

STATION

STP 8.0 PERTAINING TO SECTION 60 – CHAIN LINK FENCING

SECTION 65 STOP LOGS

SECTION 93 O&M EQUIPMENT FOR FACULATIVE LAGOONS

ATTACHMENT Geotechnical Engineering Service Report for Zuni Wastewater Lagoon Upgrades

SUPPLEMENTAL TECHNICAL PROVISIONS

ADDITIONS, SUBSTITUTIONS, EXCEPTIONS, AND/OR REVISIONS TO THE

TECHNICAL PROVISIONS

Added Technical Provisions

STP 1.0 Pre-Construction Conference:

A preconstruction conference will be held before the work proceeds which will cover the responsibilities and procedures of each of the interested parties to see that the project is completed according to the contract plans and specifications.

STP 2.0 Protection of Site, Moving Fences, and Minor Structures:

Except as otherwise provided herein, the Contractor shall protect all fences, structures, walks, utilities, trees, shrubbery, lawns, etc. During the progress of the work the Contractor shall remove all debris and unused materials and shall, upon completion of the work, restore the site as nearly as possible to its original condition, including the replacement, at the Contractor's sole expense, of any facility or landscaping which has been destroyed or damaged beyond restoration.

It shall be the Contractor's responsibility to visit the project site and determine actual conditions with regard to the existence of old car bodies, abandoned houses, fences, clotheslines, driveways, sidewalks, approaches, and other miscellaneous obstacles to construction.

The Contractor shall make all temporary openings in fences and make the necessary repairs to replace the existing fences in their original locations and conditions. Culverts, drainage pipes or other minor structures which may have to be moved temporarily from the alignment of the work shall be removed, cared for, and reset by the Contractor in a manner satisfactory to the Owner. No separate payment shall be made for the removal or replacement of these items.

Not all existing utilities were placed on the plans. The contractor is responsible for contacting NM One-Call Utility Locate to have existing utilities marked prior to construction as well as the three entities listed below.

CenturyTel Telephone Co. General Contact 505-782-4411 Continental Divide Electric Co. David Miller 505-863-3641 Zuni Tribal Facilities – Street Lights Calvert Martinez 505-782-7009

The best available information from existing as-builts and the Zuni Utility Department was utilized to show existing water and sewer facilities on the plans. However, it is expected that some variation will be discovered in the field. The Contractor shall coordinate with the IHS Project Engineer and the Zuni Utility Department (Strallie Edaakie – 505-782-5654) on a daily basis to ensure that the best available information with regard to existing facility locations is shared. Any damage to existing facilities shall be repaired at the Contractors expense. All repair couplings must be approved by the IHS Project Engineer prior to installation. The Contractor will be required to excavate and possibly replace a fitting not previously approved by the Project Engineer.

STP 3.0 Tribal Resources

General: The Contractor is responsible for procuring all necessary materials and royalty accesses to complete the prescribed Scope of Work. The Pueblo of Zuni offers local resources to be purchased for the purpose of then intended Work, including water (non-potable & potable) and backfill material.

Non-potable water and backfill material are considered royalty materials. To purchase the offered royalty materials, the Contractor will be subject to the set terms and royalty rates stipulated in the Zuni Tribal Council Resolution No. M70- 2002-B045, dated August 7, 2002 (attached). All purchase and access arrangements shall be made through the Zuni Reality Department.

Local potable water supplies are considered a Tribal utility service, managed by the Zuni Utility Department. The Contractor has the option of arranging access and use of the local potable water supplies, for the purposes of the intended Work, through the Zuni Utility Department. The Contractor will be subject to Zuni Utility Department’s set terms and water usage fees, which may differ from the royalty rate(s) stipulated for non-potable water. The Contractor will be responsible for arranging the method and point of retrieval with the Zuni Utility Department.

The Pueblo of Zuni upholds the authority to regulate the purchase of Tribal resources involving water and minerals. In the event that the Pueblo of Zuni declines sale of resources, the Contractor will be responsible for procuring the necessary material and/or resources from another source. No separate payment shall be made for the procurement of any material needed for installation and construction of prescribed facilities, including water and backfill material – all incurred costs shall be considered incidental.

STP 4.0 Zuni TERO & Taxation Compliance

General: The Pueblo of Zuni Department of TERO & Taxation regulates all business and construction activities within the Zuni Indian Reservation. The contractor shall comply with all of the business, taxation and employment regulations as administered by Zuni’s Department of TERO & Taxation. The documents which detail the Pueblo of Zuni’s requirements pertaining to the TERO and Taxation matters are attached for the Contractor to reference.

Business License: The primary contractor and all subcontractors are responsible for obtaining a Pueblo of Zuni Contractor’s License and are subject to the associated licensing fee(s). The Contractor’s License must be obtained prior to construction and is received through the Pueblo of Zuni’s Department of TERO & Taxation.

No separate payment shall be made for the procurement of the required permit(s).

TERO Indian Preference: The contractor shall comply with the hiring policies administered by Pueblo of Zuni’s Tribal Employment Rights Office.

Attachments:

TERO Contractor’s Requirements

TERO Rates – Resolution M70-96-E032

STP 5.0 Pertaining to SECTION 06 – GRAVITY SANITARY SEWER

TP-605 shall include the following:

Connection to Existing Sewer Mains: Connections to existing sewer mains shall be made at the locations indicated in the construction drawings. The connection shall utilize a long sweep 45-degree (or a lesser angled) wye fitting and any other necessary appurtenances to securely and completely adjoin the new line with the existing line such that the new sewer main conveys flows to the existing line without interference. All piping and connection materials and installation methods shall conform to the standards specified in this section (TP-06) of the technical provisions.

The Contractor shall notify the Engineer and operating utility at least five (5) days in advance of the sewer service disruption. Each connection shall be made at a time and under conditions which will least interfere with the wastewater treatment operations. Such connections shall be made to the satisfaction of the operating utility and the Engineer. Tools and fittings that properly accommodate the actual conditions encountered during each connection event shall be utilized. The cutting of the pipe for the application of connection fittings shall be done in strict accordance with the recommendations of the pipe manufacturer and in a manner that prevents damages to the new and existing pipe.

It shall be the responsibility of the Contractor to deem the need for sewage bypass pumping to facilitate the connection. If bypass pumping is necessary to ensure the containment the sewage flows, the Contractor will be responsible for proposing a bypass pumping plan to the Engineer for review and approval. The Contractor shall install and execute the approved bypass pumping efforts.

TP-612 shall include the following:

K. Connection to Existing Sewer Mains: Connections of new gravity sewer mains to existing gravity sewer mains shall be measured each. Payment shall be at the contract unit price shown in the Bid Schedule. This price shall be full compensation for furnishing all labor, equipment, materials and incidentals required to complete the connection including but not limited to excavation, service interruption, *sewage bypass pumping, cutting of existing sewerline, provision and installation of fittings, backfilling, resumption of service, as-builts, and final cleanup.

* sewage bypass pumping efforts shall not be automatically included in the contract price. Inclusion of the sewage bypass pumping efforts shall be collaboratively determined by the Contractor and Engineer.

STP 6.0 Pertaining to SECTION 40 – SEWAGE TREATMENT LAGOON

CONSTRUCTION

TP-4003 MATERIALS:

The first sentence of TP-4003.A.4. shall be replaced with the following:

The lagoon level gauge shall be 6-inches wide and of sufficient length to measure the entire depth of the lagoon cell. The gauge shall be adhered to 0.125-inch thick rigid fiberglass with an engineer’s grade adhesive, equal to the FRP Staff Gauge manufactured by Virtual Polymer Compounds, LLC.

The last sentence of TP-4003.A.4. shall be replaced with the following:

The lagoon level gauge shall be fastened to a corrosion-resistant member of sufficient dimensions and rigidness to support the vertical standing gauge (effectively withstand bending forces). The mounting member shall be a either coated stainless steel u-channel or plate/board, an HDPE board, or an alternate solution proposed by the Contractor and approved by the Engineer. Lumber or wood members will not be accepted.

TP-4003.A. shall include the following:

5. Plug Valves:

Plugs shall be solid one piece, cast iron ASTM A126 Class B. The plug shall have a cylindrical seating surface eccentrically offset from the center of the shaft. Plug shall not contact the seat until at least 90% closed.

Resilient plug facing shall be Chloroprene (CR). Spherical shaped plugs are not acceptable.

Bodies shall be cast iron ASTM A126 Class B. Ports shall be rectangular and 100% port. The valve port area shall meet or exceed standard pipe area per ASME/ANSI B36.10M. Round ports are not acceptable. Bearings shall be sleeve type and made of sintered, oil impregnated permanently lubricated type 316 stainless steel, ASTM A743 Grade CF8M through 36” (900mm). In valves larger than 36” (900mm), the upper and lower plug journals shall be fitted with ASTM A240 type 316 stainless sleeves with body bearings of ASTM B30, alloy C95400 aluminum bronze.

Seats shall be 1/8” thick welded overlay of not less than 95% pure nickel.

Seat shall be at least 1/2” wide, 1/8” thick through entire width and raised.

The raised surface shall be completely covered with nickel to insure that the resilient plug face contacts only the nickel seat.

Adjustable packing shall be Acrylonitrile-Butadiene (NBR) multiple V-ring type, with a packing gland follower. Packing gland shall permit inspection, adjustment or complete replacement of packing without disturbing any part of the valve or actuator assembly, except the gland follower. Non-adjustable packing or packing requiring actuator removal to replace the packing, is not acceptable.

Pressure ratings shall be 175 psi (1210 kPa) on valve sizes through 12" (300mm) and 150 psi (1035 kPa) for 14" (350mm) and larger. Every valve shall be given a certified hydrostatic shell test and seat test, with test reports being available upon request.

All valves larger than 6” shall be installed with worm gear actuators. All gearing shall be enclosed in a cast iron housing, with outboard seals to protect the bearings and other internal components. The actuator shaft and gear quadrant shall be supported on permanently lubricated bronze bearings.

Buried actuators shall be 90% grease filled. Input shaft and fasteners shall be stainless steel. Actuator mounting brackets shall be totally enclosed.

Other actuators to be installed according to drawings or customer specifications.

End connections shall meet or exceed the latest revisions of AWWA C517 and other applicable standards. End Connections shall be Flanged drilled per ANSI B16.1 and/or Mechanical Joint per AWWA C111.

Plug Valves shall be equal to the DeZURIK Eccentric Plug Valve, Rectangular Port (AWWA C517) (PEC) for sewer applications.

TP-4004 LAGOON EARTHWORK

TP-4004.C. shall be replaced with the following:

Excess Material Hauled to Waste: All excavated material not utilized or unsuitable for berm construction, including all stripped and grubbed materials (not including sludge) shall be wasted at site or area designated by the Pueblo and Engineer.

Refer to TP-1 regarding requirements for traffic control per the Manual on Uniformed Traffic Control Devices (MUTCD) to ensure that hauling is performed in a safe manner.

The following shall be added to the end of TP-4004.D.:

Removed sludge shall not be incorporated into the utilized fill material.

The following sentence shall be added to the end of the first paragraph of TP-4004.E.

Removed sludge material shall not constitute as approved backfill material.

The last paragraph of TP-4004.E. shall be replaced with the following:

The top of the berms shall be covered with base coarse. The application of an herbicidal sterilant will not be permitted within the vicinity of the treatment facility.

TP-4004 shall include the following:

G. Geotechnical Properties and Requirements: The Contractor is responsible for executing all lagoon earthwork, including embankment found in collective accordance with the specification stated herein as well as the conditions and recommendations issued in the August 2018 Geotechnical Engineering Services Report (attached). Any conflicting language between the technical specifications and the recommendations of the geotechnical report should be brought to the Engineer’s attention by the Contractor. In such an event, the Contractor will be responsible for the following the best-fit approach determined by the Engineer.

H. Erosion Control - Rip rap with geotextile underlayment shall be placed on the exterior berm embankments as shown in the construction drawings to equip the berms with effective erosion control. The rip rap and geotextile covering shall be spread between 2 feet beyond the berm toe, up the embankment slope to 1 foot beyond the top of berm, or as otherwise shown in the construction drawings. The geotextile underlayment shall extend in a manner that allows the geotextile underlayment to abut to the geotextile fabric intended cover the top of berm. If requested by the Contractor, the area shall be field staked by the Engineer.

1. Rip-Rap: The stone to be placed as rip-rap shall conform to the gradation scale shown below. The stone shall be placed in a mat 12 inches thick (diversion berm work) throughout the length and breadth of the area identified on the construction drawings to receive rip-rap.

Limits of Stone Weight, lb. - % lighter by weight

D100

(max)

D30

(min) 100 50 15 inches inches

36 15 11 7 5 2 9.0 4.5

Equivalent Spherical Diameter

(inches)

D100

(max) D100 (min) D50 (max) D50 (min)

D15

(max)

D15

(min)

9.0 6.6 6.0 5.3 4.8 3.6

2. Geotextile Fabric: A geotextile drainage fabric designed for soil stabilization applications shall be placed between the rip-rap stone and supporting soil.

Material shall be equal to the MacTex N 47.1 manufactured by Maccaferri Inc. and conform to the physical and chemical requirements for subsurface drainage geotextiles of the latest edition of AASHTO M 288.

The surface to receive the fabric shall be prepared to a relatively smooth condition free of obstructions, depressions, and debris. The fabric shall not be laid in a stretched condition but shall be laid loosely with a long dimension perpendicular to the berm embankment or canal centerline. At overlapping seams, the cloth shall be placed so the upstream edge overlaps the downstream edge by a minimum of three (3) feet, with securing pins inserted through overlapping layers at no greater than two-foot intervals.

Securing pins shall be steel, 18-inches in length, ¼-inch in diameter, pointed at one end, and fabricated with a head to retain a steel washer with an outside diameter of at least 1-1/2-inch. Geotextile fabric damaged or displaced before or during installation or placement of the overlaying rip-rip shall be replaced or repaired to the satisfaction of the engineer at the Contractor’s expense.

TP-4005 SLUDGE REMOVAL, HAULING AND PLACEMENT:

The content featured in TP-4005 shall be replaced with the following:

The existing sludge shall be removed from the lagoon cells identified in the construction drawings and blended with the excess excavated material not utilized for berm construction. The Contractor shall satisfy himself/herself as to the actual quantity of sludge material removed and blended.

The mixed material shall be piled at the designated stock pile site in accordance with the dimensions (area and top-of-spoil pile height) shown on the Construction Drawings.

at the designated spoil pile location indicated on the Construction Drawings.

TP-4007 PIPING STRUCTURES

The content featured in TP-4007.A. shall be replaced with the following:

A. Lagoon Transfer Structures – Type A & Type B (Dual Valve Type): The lagoon inter-connecting structures shall be constructed at the locations shown in the construction planset. Piping shall be as shown in the detail drawings and shall meet TP-4003 requirements. Materials and construction including inlet/outlet collars shall be as indicated in the TP-1, TP-2, T-3, TP-4003, and the plans and detail drawings. The contractor shall install 2” bras or aluminum caps into the concrete collars for each valve in the transfer structure.

For the transfer structures (Type A) to be installed between new treatment cells 1 & 2, 2 & 3, 3 & 4, and 4 & 5, The 2” caps shall be engraved with the following:

Valve Description Information to Engrave on Brass/Aluminum Cap

Drain 18” Plug Valve. Normally Closed - Drain.

High Level 18” Plug Valve. Normally Open – Operating Level

For the transfer structures (Type A) to be installed between new treatment cells 1 & 3, and 2 & 5, and the transfer structures (Type B) at the secondary discharge points of New Cells 1, 2 and 5, the 2” caps shall be engraved with the following:

Valve Description Information to Engrave on Brass/Aluminum Cap

Drain 18” Plug Valve. Normally Closed - Drain.

High Level 18” Plug Valve. Normally Closed – Operating Level

E. Removal and Disposal of Existing Piping Structures: The Contractor shall remove and dispose of existing piping structures, including the inlet, transfer and outlet piping structures as identified on the Construction Drawings. Materials to be removed and disposed of may include, but are not limited to, existing pipe, support piers, concrete pads, junction vaults, manholes, reinforcement features, appurtenant valves and pipe fittings. The resulting (demolished) waste material shall be hauled to a State licensed landfill or transfer station off of the Zuni Indian Reservation. The Contractor is responsible for procuring the appropriate waste site.

The existing inlet piping which conveys flows from the diversion structure to the respective existing lagoon cells shall be removed to be replaced with new 24-inch diameter PVC conduit features in accordance with the applicable technical provisions and the construction drawings. Such efforts shall include the removal of the respective (existing) discharging pipe penetrations with a core drill or an alternative method that results in minimal disturbance to the existing concrete diversion structure and facilitates the installation of a new pipe penetration connection, as detailed in TP-4007.F. The flow diversion structure shall remain in place. The Contractor is permitted to propose an alternative pipe removal method for the Engineer to consider.

F. Connection of New Inlet Pipe to Existing Flow Diversion Structure: The Contractor shall connect the newly installed inlet pipe to the existing concrete flow diversion structure, at the locations and in accordance with the details shown on the Construction Drawings.

The new discharging pipe penetrations shall be equipped with Link-Seal or equal.

The Link-Seal shall utilize a nitrile seal element and 316 stainless steel hardware.

The Link-Seal shall be installed in accordance with the manufacturer’s recommendations. All voids shall be repaired with an approved non-shrink grout.

The new pipe penetrations shall be installed to ensure the discharging pipe will convey unimpeded flows.

The Contractor is responsible for correcting any damages that are caused to the flow diversion structure during the removal of the existing penetrating pipe and the connection of the new pipe. The structural integrity, function and site conditions for the flow diversion structure are to be fully restored.

G. Discharge Structure and Piping (to Lift Station)

Concrete Vault - The outlet structure shall be installed at the location shown on the construction planset and shall be constructed of precast reinforced concrete conforming to ASTM C913, in accordance with the dimensions and details shown on the Construction. The concrete shall have a minimum 28-day compressive strength of 4,000 psi. The pre-cast concrete structure shall meet the minimum structural design loadings specified in ASTM C890, utilizing steel reinforcement features that conform to the requirements of ASTM A615 and/or ASTM A185.

Concrete and reinforcement features shall also meet the requirements specified in TP-2 and TP-3, respectively, so long as the requirements do not undermine the ASTM standards specified herein.

Access steps shall be omitted. Joints are to be sealed with butyl rubber joint stick sealant conforming to the requirements of ASTM C990.

The outlet structure shall be equipped with a high performance flexible pipe to manhole connector (“pipe boot”) on pipe penetrations equal to a PSX Direct Drive as manufactured by Press-Seal Gasket Corporation. The pipe boot shall be installed per the manufacturer’s recommendations. The pipe boot shall be installed in the concrete manhole wall at the same angle as the PVC discharge pipe. This shall be accomplished using foam hole-formers.

The excavation hole shall extend a minimum of 2 feet beyond the base dimensions (length and width).

The precast concrete vault shall be installed in its precast condition; Chipping or altering the concrete will not be allowed.

Access Cover - The outlet structure shall be equipped a double-doored aluminum trough (channel frame) type floor access cover equal to the Hatch TPD model manufactured by U.S.F. Fabrication Inc. of the dimensions specified in the construction drawings. The aluminum access cover shall be cast into the precast concrete structure and shall be equipped with 1/4-inch thick aluminum diamond plated door leaves that are reinforced for a 300 p.s.f. live load. The frame shall be extruded aluminum trough section with an integral anchor flange on all four sides.

The floor access door shall be equipped with a flush lifting handle that does not protrude above the cover and 316 stainless steel hold open arms with red vinyl grips that automatically keep the covers in their upright (90-degree angle) open positions. The door shall have 316 stainless steel hinges and 316 stainless steel tamper resistant bolts/locknuts. A staple for a padlock shall be supplied for security. The floor access door shall be Model TPD as manufactured by U.S.F.

Fabrication, Inc. with the size being specified on the plans. Installation shall be in accordance with the manufacturer’s attached instructions

Stop Logs - The outlet structure shall be equipped with stop logs which shall meet the requirements of TP-65 and achieve the stop log spill way dimensions (spill way width and stacked height) indicated in the construction drawings.

Discharge Pipe - The new pipe extending between the final wastewater treatment cell and the new discharge structure shall be installed according to the details and locations shown in the construction drawings. The outlet pipe shall conform to the material specifications of TP-4003.A.

The Contractor is responsible for installing new gravity sewer pipe necessary to connect the new discharge structure to the existing gravity sewer pipe, as shown on the construction drawings. This segment of new gravity sewer pipe shall conform to the requirements of TP-6.

Plug Valves – isolation plug valves shall be installed upstream and downstream of the discharge vault as shown on the construction drawings.

TP-4012 MEASUREMENT AND PAYMENT

TP-4012 shall include the following:

H. Strip and Grub: Payment for stripping and grubbing shall be made per acre cleared at the price established on the bid schedule. This amount shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals required to complete the work involving the clearing and grubbing as shown on the plans and specified in TP-4004, including the removal and disposal of the generated material.

I. Removal and Disposal of Existing Piping Structures: The payment for each piping structure, of the type (i.e. inlet, transfer, and outlet) and location specified in the Construction Drawings, to be removed and disposed of shall be made at the unit price established on the bid schedule. Such payment shall be full compensation for furnishing all labor, tools, equipment, materials, and incidentals required to remove and properly dispose of the involved materials. The Contractor is responsible for procuring an appropriate disposal site. The Contractor will not be permitted to dispose of any trash material on Zuni Tribal lands.

J. Discharge Structure & Piping: Construction of the discharge structure and piping shall be measured on a lump sum basis. Payment shall be at the contract price established on the Bid Schedule, which shall be full compensation for furnishing all labor, tools, equipment, materials, and incidentals to complete the installation of a the discharge structure and corresponding discharge pipe and plug valves.

K. Connection of New Inlet Pipe to Existing Flow Diversion Structure: Connection of the new inlet pipe to the existing discharge structure shall be paid at the unit price indicated on the Bid Schedule for each connection completed. This price shall be full compensation for furnishing all labor, equipment, materials and incidentals required to complete the connection including but not limited to excavation, service interruption, *bypass sewer pumping, installation of fittings, grouting, repair and or reformation of inverts, backfilling, resumption of service, as-builts, and final cleanup.

* sewage bypass pumping efforts shall not be automatically included in the contract price. Inclusion of the sewage bypass pumping efforts shall be collaboratively determined by the Contractor and Engineer per pre-bid submission correspondence.

L. Rip-Rap (Erosion Control): Payment for application of rip-rap to the exterior berm embankments shall be made per square yard laid as established on the bid schedule. This price shall be full compensation for furnishing all labor, equipment, materials and incidentals for placing the rip-rap, including but not limited to, embankment preparation, fabrication and placement of geotextile and rip-rap, as-builts, and clean-up.

STP 7.0 Pertaining to SECTION 42 – SEWAGE LIFT STATION

TP-42.02 MATERIALS

TP-42.02.05.F. shall be replaced with the following:

A dual-channel ultrasonic flow meter shall be installed in the existing valve pit as shown in the construction drawings. The ultrasonic flow meter unit shall consist of a Graphic LCD display, one set of transducers that are to be mounted, in-parallel on the pressurized lateral pipe, and all necessary cables and clamping appurtenances to be fully operable.

Each flow meter shall be fully operable operate with two transducers (flow sensors) clamped externally on the sewer force main in the valve vault. Each transducer set shall be capable of acoustically communicating (generating and receiving ultrasonic signals) to measure the velocity, volumetric, and totalized flows of clean liquids or liquids with small amounts of entrained solids (effluent). The flow meter shall measure and indicate flow rates from -40 to +40 ft/sec with ±0.1% reading accuracy. The ultrasonic flow meter shall be AquaTrans AT600 Panametrics Ultrasonic Flow Meter as manufactured by GE, or equal.

ELECTRICAL: The necessary electrical controls shall be implemented to achieve the complete installation of the specified flow meter.

The Contractor shall provide the utility operators with a comprehensive training and instructions on the operation, maintenance, troubleshooting, repair, and use of the equipment. The Contractor shall provide one (1) digital and two (2) hard copies of the O&M Manual for the ultrasonic flow meters to the Utility department, as well as O&M training with the flow meter equipment.

TP-42.02 MATERIALS

TP 42.03 shall include the following:

TP-42.03.07 Flow Meter Removal: The existing flow meter shall be removed from the meter vault as indicated on the construction drawings. In the place of the removed flow meter, the Contractor shall install a new section of ductile iron pipe of the diameter compatible (equal) to the existing force main, to effectively connect the existing upstream and downstream segments of the force main. The pipe material, required fittings, and installation methods shall meet the details of TP-43

– Sewer Force Mains.

TP-42.13 METHOD OF MEASUREMENT AND BASIS FOR PAYMENT

TP 42.13 shall include the following:

C. Flow Meter: Installation of a dual-channel flow meter in the existing valve vault shall be measured on a lump sum basis. Payment shall be at contract price established on the Bid Schedule, which shall be full compensation for furnishing all labor, equipment, site preparation, installation, training, and incidentals required for a complete installation, including the implementation of necessary electrical controls.

D. Meter Removal: Removal of the existing flow meter from the meter vault shall be measured on a lump sum basis. Payment shall be at the contract price established on the Bid Schedule, which shall be full compensation for furnishing all labor, tools, equipment, materials, and incidentals to complete the dismantling and disposal of the existing flow meter and the installation of a the new connective force main piping.

STP 8.0 Pertaining to SECTION 60 – CHAIN LINK FENCING

TP-6005 CLEANUP:

TP-6005 shall include the following:

Fence Removal and Disposal - The Contractor shall remove and dispose of the sections of existing wire fencing as indicated on the construction drawings. All components of the existing fence shall be removed, including but not limited to any concrete used to anchor fence posts, bracing, wiring (barbed, wired mesh, etc.), posts, and/or gates. The resulting waste material shall be disposed of an at appropriate disposal site off of the Zuni Indian Reservation land. The Contractor is responsible for procuring the waste site.

TP-6007 MEASUREMENT AND PAYMENT:

TP-6007 shall include the following:

C. Payment for removal and disposal of existing fence shall be made at the lump sum indicated on the accepted bid schedule. Such payment shall include full compensation for furnishing all labor, materials, tools, equipment, haulage, disposal and incidentals required to remove and dispose of the existing fencing.

The estimated length of fence that must be removed and disposed of is indicated in the construction drawings. The reported value is only intended for estimating purposes and the Contractor is responsible for satisfying himself/herself as to the actual required quantity. The fence removal and disposal shall be executed at the lump sum bid price regardless of the actual quantity demolished.

SECTION 65 – STOP LOGS

TP – 6501 SCOPE:

The contractor shall furnish and install heavy duty stop logs and guides for the outlet structure as detailed on the drawings. Stop logs shall be fabricated, assembled and placed in proper operating condition in accordance with installation instructions and recommendations of the equipment manufacturer. Equipment shall be the latest product design of a manufacturer regularly engaged in the production of equipment of this type.

TP – 6502 DESIGN CRITERIA:

A. Stop Logs: Each log shall be molded individually to the exact dimensions required to achieve the stop log stack dimensions specified in construction drawings. The stop logs shall be fabricated by means of vacuum infusion to achieve a monolithic (seamless) fiberglass reinforced plastic (FRP) covering that totally encapsulates the internal structural matrix to ensure protection from moisture infiltration or chemical deterioration. The front and back facings of each stop log shall have a minimum (FRP) thickness of ¼ inch (6mm); remaining perimeters shall feature a minimum FRP thickness of ¾ inch (19mm). Seams or joints that may allow water intrusion will not be accepted. The maximum fiber stress (ultimate or yield, whichever applies) of the stop logs shall exceed 2.5 times the working stress.

Stop logs shall be manufactured of reinforced thermoset copolymer resin containing ultraviolet absorbers. The surface shall be resin-rich (comprised of 95% resin) to a depth of 0.010 inches (2.5mm) to 0.020 inches (5mm) and shall be free of exposed reinforcing fibers.

The core FRP shall consist of copolymer composite and reinforcing fibers formed to achieve the mechanical requirements.

Internal steel reinforcing structure shall be welded per AWS standards, sandblasted, and coated with epoxy vinyl ester resin to ensure thorough bonding with the copolymer composite. Core materials shall be 100% resistant to fungal and bacterial decay and hydrocarbon effects.

All stop logs shall be level and flat.

Deflection: Maximum allowable deflection of each stop log shall be less than L/360 of the channel width or 1/4", whichever is less at the maximum operating head.

B. Seals: Stop logs shall be equipped with bottom seals to seal between the between the stacked logs. Vertical seals shall be mounted to the end of the stop log panels to achieve a sealed contact with the guide railing. Seals shall consist of molded EPDM with hardness of 55 to 65 Shore A Durometer, conforming to ASTM D-2000, with a maximum compression set of 25%, and low temperature brittleness to meet suffix F-17 (40°F). Closed cell elastomers and hard plastic surfaces will not be acceptable.

C. Lifting Pins: Stop logs shall be supplied with two permanently embedded 1-1/2" diameter stainless steel lifting pins that shall pass completely through the log. The lifting pins shall be sufficiently fastened to the log to within stand the lifting force.

The lifting pin holes that pass through the logs shall not make contact with the internal steel reinforcement.

D. Guide Frames: Guide frames shall be designed for embedment / in-channel and shall have a slot suitable for mating with the stop log panels. The embedded guide frame can be fastened to the structure by either: (1.) inserting and grouting the guide frame into an established block-out, or (2.) casting the concrete structure with the embedded guide frame fixed in place.

E. Head Pressure: The stop log system shall be designed for a maximum head pressure as per gate schedule.

F. Lifting Beam: The lifting beam shall be compatible with the stop log system, and shall be capable of lifting the each stop log by automatically latching to the 1-1/2” diameter lifting pins of the upper stacked log.

TP – 6503 MATERIALS:

A. Guides: Guide frames shall be manufactured of T-316 stainless steel or reinforced copolymer.

B. Stop Logs: Stops logs shall be engineered composite fiberglass reinforced plastic

(FRP) completely encapsulating an internal steel reinforcing structure. The stop logs shall be infusion molded to create a seamless corrosion barrier impervious to moisture. The FRP resin shall be polyester. The internal steel reinforcement shall be carbon steel.

C. Stop Logs Seals and Embedded / In-Channel Seals: All seals shall be molded

EPDM.

D. Lifting Pins: Shall be made of T-316 stainless steel.

E. Anchor Bolts: Shall be made of T-316 stainless steel.

F. Lifting Beam: Shall be made of T-304 or T-316 stainless steel.

G. Heavy duty stop logs and guides shall be as manufactured by Plasti-Fab, Inc., P.

O. Box 100, Tualatin, Oregon 97062, or approved equal.

TP – 6504 INSTALLATION:

All stop logs shall be installed in accordance with:

A. The plans and specifications.

B. The recommendations of the equipment manufacturer.

TP – 6505 WARRANTY:

Manufacturer must provide a warranty for 25 years against failure due to corrosion.

TP – 6506 MANUFACTURER REQUIREMETS:

Manufacturer must have documented experience in the design and manufacture of stop logs and accessories. Experience and qualifications documents shall be submitted to the Engineer whom will determine the satisfactoriness of reported credentials.

TP – 6507 DELIVERTY, STORAGE AND HANDLING:

The Contractor shall be responsible for ensuring that all stop log system materials scheduled for installation are free from defects. Any materials featuring damages or defects will be rejected and must be replace at the cost to the Contractor.

TP – 6508 SUBMITTALS:

A. Stop log product information, showing:

1. All critical dimensions

2. Principal parts and materials

B. Installation instructions

TP – 6509 MEASUREMENT AND PAYMENT:

Stop logs shall be considered incidental to the construction of the outlet structure.

SECTION 93 – OPERATION AND MAINTENANCE EQUIPMENT FOR

FACULATATIVE LAGOON

TP - 9301 SCOPE:

The work covered under this section consists of furnishing all efforts necessary for the complete provision of the specified O&M equipment.

TP - 9302 GENERAL:

The Contractor shall procure and provide the following equipment to the Zuni Utility Department (ZUD):

- Portable pH and Dissolved portable multi meter environmental monitoring kit, equal to the Hach HQ40D, Product No. HQ40D53115315. The portable monitoring kit shall be capable of simultaneously measuring pH and DO and shall feature a rugged pH electrode, a rugged LDO probe, and a 5 meter cable.

TP – 9303 SUBMITTALS:

The Contractor shall provide product information for all intended equipment to be accepted by the Engineer.

TP – 9304 MEASUREMENT & PAYMENT:

The Contractor shall be paid the lump sum price indicated on the Bid Schedule for the provision of the specified O&M equipment. This price shall be full compensation for all labor, equipment, and incidentals necessary to furnish the equipment to the ZUD.

V. ATTACHED MAP

See attached Construction Drawings

VI. SCHEDULE OF WORK

The Contractor shall complete the work in a two-phase construction process to facilitate the continuous operation of the wastewater treatment facility. The Contractor will be responsible for working with the Zuni Utility Department and Engineer to coordinate the drying of the existing treatment cells with the scheduled construction activities.

VII. COMMENCING OF WORK & TIME OF COMPLETION

The Contractor shall begin work no later than one month upon contract award.

All said work outlined shall be completed within 240 calendar days upon issuance of Notice to Proceed.

VIII. WORK HOURS

The majority of the work shall be performed within the normal five (5) day work week observed by occupants of the site(s), federal and Zuni Tribal holidays excluded. All Tribal holiday periods which will prohibit construction activities will be communicated to the Contractor by the COR in at least one week in advance.

Any work performed outside of normal working hours shall be done at no additional cost and shall commence only after prior approval for such work has been obtained from the COR.

IX. WORK CONDITIONS

Contractor Responsibility: The Contractor shall assume full responsibility and liability for compliance with all applicable regulations, including Occupational Safety and Health Administration (OSHA), pertaining to the health and safety of personnel during the execution of work, and shall hold the Government harmless for any action on the part of its employees or subcontractors.

X. INTERFERENCE RESULTING FROM WORK

Conduct operations to ensure minimum interference with roads, streets, walks, and other adjacent occupied or used facilities. Do not close or obstruct streets, walks, or other occupied or used facilities without permission from the COR or authorities having jurisdiction.

Storage of Materials and Equipment: The Contractor shall not store equipment nor stockpile material on-site without prior approval from the COR.

Ownership and Purchase of Materials: The Contractor shall purchase and deliver materials to be installed as part of this contract. Installation materials are subject to inspection and acceptance by the COR. Materials shall be of quality and type as specified. Materials once installed, becomes the property of the Government.

XI. PROTECTION

All necessary precautions, including the use of appropriate warning signs and barricades, shall be taken to prevent personal injury, damage to property (including existing landscape materials, surfaces, and structures), and/or damage to the environment when conducting operations.

The Contractor will be responsible for replacing or restoring damaged landscape materials, landscape surfaces, or structures caused by normal operations and/or as a result of the Contractor’s negligence as acceptable to the Government or parties having jurisdiction, at no additional cost.

XII. WORK COMPLETION

Work shall not be considered completed until

1. Final Inspection is conducted. The Final inspection is to be scheduled by the COR. Required participants include the Contractor, the Engineer, and a Tribal Representative.

2. The Contractor has completed all punch list items identified during the

Final Inspection.

3. All completed work is formally accepted by the COR.

4. The Contractor has removed from the premises all trash, debris, litter, etc., accumulated during the performance of work. Containers for handling this material shall be furnished by the Contractor.

IV. DELIVERABLES

The following items, limited to, shall be received by IHS after final acceptance.

1. Electronic As-Built Drawings

2. User manuals for the individual systems installed

V. SCHEDULE

Construction 240 days

Total Project 240 days

VI. CORRESPONDENCE

All correspondence shall be addressed to the COR and Project Engineer. Each letter, document, etc., shall contain the following information:

1) Date

2) Project Number

IHS Point of Contacts:

Brad Sherer, COR, OEHE/ASU

(505) 248-7624 Bradley.Sherer@ihs.gov

Genna Slape, Project Engineer, OEHE/ASU

(505) 206-2794 Genna.Slape@ihs.gov