Attach_03_Project_Specifications.pdf

PINECREST DAY USE AREA

SEWER SYSTEM REFURBISHMENT

Stanislaus National Forest

Project Specifications

02300 Earth Moving 02532 Sewer Lift Station 07160 Manhole Sealing 07900 Caulking and Sealants

PINECREST DAY USE AREA SEWER SYSTEM REFURBISHMENT

EARTH MOVING 31 20 00-1

SECTION 02300 - EARTHWORK

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. None.

1.2 WORK INCLUDED

A. Scarifying, excavation, backfilling, and surfacing contained in the Specifications.

B. Excavate and Backfill, complete, as shown and as specified.

1.3 RELATED WORK

A. 02532 Sewer Lift Station

1.4 REFERENCES

A. American Society for Testing and Materials (ASTM).

B. Standard Specifications for Construction of Roads and Bridges on Federal Projects, FP-14.

1.5 QUALITY ASSURANCE

A. Adjust all work performed that does not meet technical or design requirements, but make no deviations from the Contract Documents without specific and written acceptance by the CO.

1.6 1.6 REQUIREMENTS OF REGULATORY AGENCIES

A. Federal, State, and local code requirements shall control all work.

B. Obtain and pay for inspections and certificates of inspection.

C. Comply with OSHA excavation requirements and permits.

1.7 1.8 SITE CONDITIONS

A. General: Clearing work shall not begin until temporary fences, barricades, warning signs and other pedestrian control devices are installed.

B. Existing Subsurface Utilities: Existing facilities are shown on the plans to help the Contractor avoid damage to essential utilities which must remain in service. The Contractor shall contact Underground Service Alert to ascertain location of all underground facilities prior to doing work that may damage such facilities. The Contractor shall retain the services of an underground locating company to

GROVELAND RANGER STATION SEWER SYSTEM REFURBISHMENT

EARTHWORK 02300-2

determine the location of all private facilities. If the Contractor discovers underground facilities not indicated on the plans or in a location different from what is indicated on the plans, the Contractor shall protect such facilities from damage and notify the CO immediately.

C. Protection

1. If existing live utilities are encountered, protect same from damage and notify the CO. Do not interrupt service except as directed by the CO.

Allow sufficient time for utility company to arrange for continuation of required services. Record locations on As-Built Drawings.

2. Do not allow equipment to pass over existing streets or other public and private property without ample protection. Any such property which is damaged as a result of operations under this Section shall be restored to original condition with duplicate materials.

3. Protect open excavations, trenches, and the like with fences, barricades, covers, and railings as required to maintain safe pedestrian and vehicular traffic passage. Prevent erosion of freshly graded areas during construction and until such time as permanent drainage measures have been installed.

Assume liability for all claims related to windblown dust and dirt or downstream siltation of waterways due to on-site erosion due to construction.

4. Every precaution shall be taken to prevent spillage when hauling on or adjacent to any Public Street or highway. If spillage occurs, all such spillage shall be removed and the streets and highways shall be swept, washed, or otherwise cleaned as required by local City and County authorities and/or the State of California.

5. All precautions shall be taken as needed to prevent dust nuisance to adjacent or other public and private properties and to prevent erosion and transportation of soil to downstream properties due to work under this Section. Any damage so caused shall be corrected or repaired as part of the work under this Section at no additional cost to USFS.

6. If precautions, corrections, or repairs required under this Section are not undertaken promptly, the CO may take such steps as it may deem necessary and deduct the cost of same from the monies due under the Contract. Any such action or failure to act on the part of the CO shall in no way alter or relieve the Contractor from complete responsi-bility for the proper protection of the work and all public and private properties and activities which may be affected thereby.

7. All portions of the Work shall be kept free of standing water at all times.

Maintain uniform grades, construct ditches and/or provide and operate pumps to prevent erosion, softening of compacted surfaces and formation of mud in trenches and excavations. Ditches shall be constructed, tamped and maintained in a neat, uniform shape. Do not under any circumstances conduct or pump water or allow water to be diverted or flow toward other

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areas of the site which may be damaged thereby. Protect inlets from siltation.

1.8 DEFINITIONS

A. Fill: Soils or soil-rock material placed to raise the existing grade of the site or to backfill excavations.

B. On-Site Material: Material obtained from the site including aggregate base or asphalt. Asphalt shall be no larger than 1 inch.

C. Borrow: Material required for earthwork construction in excess of the quantity of suitable material available from the required grading, cuts and excavations.

Borrow may be necessary even though not shown on Drawings.

D. Select Material: Material meeting the requirements as indicated under Part 2 – Products.

E. Embankment: The portion of a fill section situated between the natural ground or exposed excavation surface and the finished surface, excluding any material placed under another Section of these Specifications.

F. Relative Compaction: The ratio of the in-place dry density of constructed fill to the maximum dry density, as expressed as a percentage.

G. The following test procedures will be utilized by the Geotechnical Engineer to determine compliance of materials and placement and compaction methods with these specifications:

1. Test Procedures or Designation Purpose:

a. ASTM Designation: D422 Grain-Size Analysis ASTM Designation: D2216 Moisture Content ASTM Designation: D4318 Plasticity Index.

b. ASTM Designation: D1557 Maximum Dry Density ASTM Designation: D1556-64 In-Place Density ASTM Designation:

D6938-08 In-Place Density ASTM Designation: D3017-88 In- Place Moisture Content ASTM Designation: D4254-83 Relative Density.

H. Subgrade: The soil prepared and compacted to support a structure or a pavement system.

I. Imported Material: Material hauled in from off-site borrow areas.

J. Engineered Fill: Embankment that has been constructed to specifications requirements, in the opinion of Geotechnical Engineer.

K. Standard Specifications: Standard Specifications of Caltrans, latest edition.

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L. Bridging Material is a course, angular material used for stabilizing soft subgrade conditions.

M. Materials Manual is that of the State of California, Department of Public Works, Division of Highways, latest edition.

PART 2 – PRODUCTS

2.1 MATERIALS

A. Requirements for General Fill Materials: All fill material shall be approved by the COR. The material shall be a soil or soil-rock mixture which is free from organic matter or other deleterious substances. The fill material shall not contain rocks or lumps over 4 inches in greatest dimension, and with not more than 15 percent larger than 2-1/2 inches.

B. Requirements for Select Material: In addition to the above requirements for general fill material, select non-expansive material shall be a low plasticity soil having a Plasticity Index of 7 (seven) or less, and be approved by the soils engineer.

C. Site Material: Structural fill shall consist of a predominately granular material such as a creek run or pit run clayey sand and gravel, uniform soil classification GM, GC, SM, or SC.

D. Provide inorganic soil materials that have a plastic index less than 7 (seven) and an Expansion Index no greater than 20 (twenty) and that meet the following gradation criteria:

Sieve Opening Percent Passing by Weight 4-inch square 100 3/4-inch square 70 minimum U.S. No.4 60 minimum

Native backfill shall consist of native materials excavated at the project site during construction.

E. Imported Materials: All fill materials shall be approved in advance by the CO prior to placement.

F. Excess Material: Excess material is material deemed not suitable for use on the site. Excess material shall be disposed of only in lawfully designated areas.

G. Mounding Material: On-site soil containing organic matter considered unsuitable for fill material or topsoil may be used to construct landscape mounds and berms which do not support paving, steps or other structures.

H. Soil materials used on this Project shall not contain asbestos.

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PART 3 – EXECUTION

3.1 FAMILIARIZATION

A. Prior to all work, the Contractor shall become thoroughly familiar with the site and subsurface conditions, and all portions of the work.

3.2 LINES AND LEVELS

A. Accurately lay out lines, grades, elevations and drain locations and set all necessary stakes required for the work.

B. Protect and maintain existing bench marks and control monuments and stakes and any new bench marks and control monuments and stakes that may be established.

C. Finished grades shown on Plans are given in feet and decimals of feet and are to be the top of graded or paved surfaces. Slope uniformly between given spot grades (minimum slope is 1 percent) unless otherwise indicated.

D. Transition between slopes and relatively flat areas shall be rounded and gradual.

E. Transition between changes in vertical gradient of walks and paving shall be smooth and gradual with no abrupt or sharp changes.

F. Horizontal curves and radii shall be laid out tangent to adjacent straight lines or adjacent compound curves. Curves shall be smooth and flowing.

3.3 DEWATERING

A. Prevent surface water and subsurface or ground water from flowing into excavations and from flooding project site and surrounding area. Do not allow water to be diverted onto adjacent properties.

B. Establish and maintain temporary drainage ditches and other diversions outside excavation limits to convey rainwater and water removed from excavations to collecting or runoff areas. Do not use trench excavations as temporary drainage ditches.

C. Do not allow water to accumulate in excavations. Remove water to prevent softening of foundation bottoms, undercutting of footings, and changes in soil detrimental to stability of sub-grades and foundations. Provide and maintain pumps, well points sumps, suction and discharge lines, and other dewatering system components necessary to convey water away from excavations.

D. The Contractor shall employ sediment and erosion control measures, as necessary, so that water which is to be discharged into the street, storm drainage system, stream, channel, etc., shall be predominately free of silt and other objectionable particulate matter.

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3.4 SITE PREPARATION AND EXCAVATION

A. Site shall be cleared of all organic material.

B. Excavation:

1. Excavation is unclassified and shall be done to the lines, grades and dimensions indicated on the Drawings regardless of the character of the materials encountered.

C. Unauthorized Excavation:

1. Unauthorized excavation consists of removal of materials beyond indicated subgrade elevations or dimensions without specific instruction from the CO.

2. Backfill and compact unauthorized excavations as specified for authorized excavations, unless otherwise directed by the CO.

D. Utility Removal:

1. Any abandoned buried utility pipes encountered on the site shall be capped, sealed and/or grouted closed.

E. Subgrade Compaction:

1. After the excavations have been approved by the Geotechnical Engineer, the exposed native soils shall be scarified, moisture-conditioned, and compacted to a minimum depth of 8 inches.

2. After the subgrade is compacted, fill can be placed to provide the desired finished grades.

F. Soft Subgrades:

1. Any areas where soft or pumping soils are encountered which will not allow proper com-paction should be excavated to firm soil. The areas may then be brought up to planned grade in compacted lifts not exceeding 8 inches in loose thickness. Soft Subgrades shall be prepared as directed by the soils engineer.

G. All excess clean site material not used as part of this project shall be stockpiled as directed by the CO.

3.5 PLACING AND COMPACTING FILL MATERIAL

A. All fill material shall be compacted as specified below or by other methods. The top 8 inches of subgrade shall be compacted to a minimum relative compaction of 95 percent in pavement areas.

B. Before compaction begins, the fill shall be moisture conditioned either by: (1) aerating the material if it is too wet; or (2) spraying the material with water if it is

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too dry. Each lift shall be thoroughly mixed before compaction to assure a uniform distribution of water content. It shall be the responsibility of the Grading Contractor to attain the proper moisture content during compaction. No fill shall be placed during the rain or when saturation will hinder proper compaction.

Jetting or flooding of the fill will not be permitted.

C. Place landscape embankment along walls and areas shown so as to prevent damage to the structure or drainage system.

D. Backfill excavations as promptly as progress of the work permits, but not until completion of the following:

1. Acceptance of construction below finish grade including, compaction and where applicable, damp proofing and waterproofing.

2. Inspecting, testing, approving and recording locations of underground utilities.

3. Removing trash and debris.

E. Compacting:

1. Control soil compaction during construction to provide the percentage of density specified for each area as determined according to ASTM D1557.

2. Provide not less than the following maximum density of soil material compacted at optimum moisture content for the actual density of each layer of soil material in place, and as approved by the CO.

a. Structures: 90 percent of maximum density.

b. Driveways and Parking Areas: 95 percent of maximum density

(top 6 inches).

F. Moisture Control:

1. Where subgrade or layer of soil material must be moisture conditioned before compacting, uniformly apply water to surface of subgrade or layer of soil material to prevent free water appearing on surface during or subsequent to compacting operations.

2. Remove and replace, or scarify and air dry, soil material that is too wet to permit compacting to the specified density.

3. Soil material that has been removed because it is too wet to permit compacting may be stockpiled or spread and allowed to dry. Assist drying by discing, harrowing, or pulverizing until moisture content Is reduced to a satisfactory value as determined by moisture density relation tests approved by the CO.

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3.6 TOLERANCES

A. The surface of the completed fill shall be finished true to line and grade and shall present a smooth, compacted, and unyielding surface. Depressions shall be filled and compacted and loose material shall be removed..

3.7 ADJUSTMENT OF EXISTING UTILITY STRUCTURES

A. Adjust tops of existing manholes, vaults, pull boxes, valve boxes, and cleanouts, to conform to new finish grades.

B. Tops of existing structures shall be adjusted to set flush with finished grades and shall conform with slope angles where possible.

C. Lids, covers, etc., shall be put into operable condition equal to the original installation.

3.8 TREATMENT AFTER COMPLETION OF GRADING

A. After grading is completed and the Geotechnical Engineer has finished his observation of the work, no further excavation or filling shall be done except with the approval of and under the observation of the Geotechnical Engineer. It shall be the responsibility of the Contractor to prevent erosion of freshly graded areas during construction and until such time as permanent drainage measures have been installed.

3.9 FIELD QUALITY CONTROL

A. Secure the CO’s inspection and approval of subgrades and fill layers before subsequent construction is permitted thereon.

3.10 MAINTENANCE

A. Protection of newly graded areas:

1. Protect newly graded areas from traffic and erosion, and keep free from trash and weeds.

2. Repair and reestablish grades in settled, eroded, and rutted areas to the specified tolerances.

B. Where completed compacted areas are disturbed by subsequent construction operations or adverse weather, scarify the surface, reshape and compact to the required density prior to further construction.

END OF SECTION

WASTEWATER UTILITY PUMPING STATION 02532-1

SECTION 02532 - WASTEWATER UTILITY PUMPING STATION

PART 1-GENERAL

1.1 SECTION INCLUDES

A. Site assembled and tested precast wastewater utility pumping station, including:

1. Precast concrete wet-well and valve vault refurbishment.

2. Pumps and mountings.

3. Control panels.

4. Internal Piping integral to pumping station.

5. Pumping station design services.

6. Odor control system.

1.2 ACTION SUBMITTALS

A. Product Data: Provide manufacturer's technical data including station capacities and operating characteristics.

B. Pump Performance Curves.

C. Shop Drawings: Show fabrication and installation details

1.3 INFORMATIONAL SUBMITTALS

A. Certificate: Signed by manufacturer, verifying pumping station performance testing.

1.4 CLOSEOUT SUBMITTALS

A. Field Reports: Provide quality-control test reports documenting station operation performance.

B. Warranty: Signed copy of manufacturer's warranty.

C. Operation and Maintenance Manual: Include approved submittals and schedule for maintenance requirements.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications: NPCA-certified plant, with experience and demonstrated capability to produce work specified in this Section

WASTEWATER UTILITY PUMPING STATION 02532-2

B. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use

1.6 WARRANTY

A. Manufacturer's Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of pumping stations that fail in materials or workmanship within specified warranty period.

1. Failures include, but are not limited to, the following:

a. Structural failures including precast concrete structures, hatches, and other accessories.

b. Faulty operation of pumps, controls, or pumping and piping system accessories.

c. Deterioration of metals, metal finishes, and other materials beyond normal use.

2. Warranty Period for Precast Concrete Structures: One year from date of Substantial Completion

3. Warranty Period for HOMA Pumps:

Intermittent Duty Months: 0-18 19-31 32-45 46-60 Continuous Duty Hours: 0-3000 3000-6000 6000-9000 9000-12,000

Warranty: 100% 75% 50% 25%

4. Warranty Period for Control Panel: Provided by Control Panel Manufacturer; Varies upon manufacturer specified by Engineer. TBD during bidding process.

1.7 MEASUREMENT

A. The quantity of 02532(1), Sewer Lift Station is to be measured at the unit bid price per each and shall be complete and in place, and in accordance with the project drawings and accepted practices.

1.8 PAYMENT

A. The Sewer Lift Station bid item shall include all materials, fittings, couplings and appurtenances equipment and labor necessary to complete these items.

Excavation, sub grade preparation, bedding, installation of wet well, valves, valve boxes, backfill, compaction and electrical service and controls are considered incidental to Sewer Lift Station installation and shall be included in the cost for installation of Sewer Lift Station. All testing of installed Sewer Lift Station systems are considered incidental to Sewer Lift Station installation and shall be

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included in the cost for installation of Sewer Lift Station. There will be no additional compensation to the Contractor for any item considered incidental to this item. All payments will be made in accordance with Section 01200, "Measurement and Payment."

Payment will be made under:

Pay Item Pay Unit 02532(1) Sewer Lift Station Each

PART 2-PRODUCTS

2.1 MANUFACTURER

A. Basis of Design: Provide site assembled precast wastewater utility pumping station, including specified controls, pumps, valves, internal piping, and precast concrete well and valve vault by manufactured and furnished by Jensen Precast, Sparks, NV, (800) 648-1134, info@jensenprecast.com, www.jensenprecast.com.

2.2 WASTEWATER PUMPING STATION DESIGN CRITERIA

A. Description: Site assembled and tested precast wastewater utility pumping station including controls, pumps, valves, internal piping, precast concrete well, and valve vault.

1. Pump Station Peak Design Flow: 60 gpm

2. Force Main: As shown on Drawings and specified in 02530.

3. Design Elevations: as shown on Drawings.

4. Wet Well: Precast concrete.

a. Capacities and Characteristics: Provide base, bane!, and flat top precast sections as follows to correspond to height of precast structures indicated:

1) Diameter or Dimensions: 60 inches.

2) Inlet Pipe Size: 6 inch NPS.

3) Discharge Pipe Size: 2 inch NPS.

2.3 PRECAST CONCRETE STRUCTURES

A. General: Size indicated, with provision for sealant at joints, meeting ASTM C 913, designed for incidental traffic.

B. Round Precast Concrete Wells: ASTM C 478, precast, reinforced concrete.

1. Top: 8.5 inch minimum thickness flat top.

2. Base Section: 8 inch minimum thickness for floor slab.

3. Walls: 6 inch minimum thickness for walls.

4. Joints: Bell or spigot, ASTM C 443

5. Flexible Resilient Pipe Connectors: ASTM C 923 http://www.jensenprecast.com/

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C. Precast Concrete Vaults: ASTM C 858, precast, reinforced concrete.

1. Base Section: 4.5 inch minimum thickness for floor slab.

2. Walls: 4.5 inch minimum thickness for walls.

3. Resilient Pipe Connectors: ASTM C 923, cast or fitted into walls for each pipe connection.

D. Joint Sealant: ASTM C 990, bitumen or butyl rubber.

2.4 PRECAST CONCRETE MATERIALS AND MIX DESIGN

A. General: Precast concrete according to ACI 318/318R.

B. Concrete Design Mix: 4,000 psi minimum with 0.45 maximum water/cementitious materials ratio.

2.5 ACCESS DOORS AND FRAMES

A. Access Door: Galvanized steel, spring assisted covers, rated for incidental traffic loading.

2.6 WET-WELL ACCESSORIES

A. Pipe Supports: Manufacturer’s standard.

B. Guide Rail Assembly: Guide rails, stainless steel, Type 316 with pump guide brackets configured to match requirements of HOMA pumps.

C. Flexible Resilient Pipe Connectors: Flexible connector, ASTM C 923.

D. Well Protective Liner: Chemical resistant, high tensile strength, puncture-resistant polymer membrane.

E. Ventilation: Ductile Iron piping

2.7 PUMPS

A. Wet-Well Wastewater Pumps: Non-clog submersible type centrifugal pump with auto coupling, designed to handle raw, unscreened sewage, with induction type electric motor assembled in a single body, watertight NEMA Type B Chamber.

1. Basis of Design Product: Provide HOMA Pump Technology Inc. GRP series Non-

Clog Pumps or equal as approved by the CO prior to bid.

2. Pumping System: Comply with NEC Class 1. Division 1, Group C & D hazardous locations.

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3. Pumping System Characteristics: As required to meet performance requirements.

a. Number of Pumps: Two

b. Capacity: 60 GPM

c. Motor Size: 2.4 hp

d. Total Head: Varies, see SOW.

4. Pump Materials of Construction

a. Major Castings: ASTM A48 Class 40B cast iron

b. Wear Ring: ASTM B144 bronze

c. Shaft: AISI 430 F stainless steel

d. Fasteners: AISI 304 stainless steel

e. O-Rings: Nitrile rubber

f. Shaft Seals: Silicon carbide/silicon carbide (impeller and motor side)

g. Cable Jacket: Neoprene

h. Cable Entry: Elastomer grommet, stainless steel washers

i. Protective Coating: High solids epoxy

B. Pumping Station Electrical Characteristics

1. Electrical Service:

a. Volts: 230 V

b. Phases: Single

c. Frequency: 60 Hz

2.8 PUMPING STATION CONTROLS

A. Control Sequence of Operation: Cycle each pump on and off automatically to maintain well wastewater level. Automatic control operates both pumps in parallel if well level rises above starting point of lag pump until shutoff is reached. Automatic alternator with manual disconnect switch shall change sequence of lead lag sewage pump at completion of each pumping cycle.

B. Motor Controllers: Magnetic, full voltage, nonreversing. Include undervoltage release, thermal overload heaters in each phase, manual reset buttons, and hand-automatic selector switches. Include circuit breakers to provide branch-circuit protection for each controller.

C. Install labels to identify switches and controls.

D. Control Panel: Complying with UL 508A provide weatherproof enclosure, covered compartments sized to accommodate controllers, circuit breakers, transformers, alternators, and programmable logic controller.

1. Basis of Design Product: Orenco Systems, Inc. MVP-DAX Series Duplex Control

Panels or equal as approved by the CO prior to bid.

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2. Enclosure: NEMA 250, type 4, powder coated steel.

E. Level Control System: Manufacturer’s standard control system of type indicated.

Senses variation of wastewater level in well. System includes high and low adjustments capable of operating on a 6 inch minimum differential of liquid level.

1. Control Type: Internally weighted non-mercury floats as follows:

a. Lag/Override: Turns on second pump and sounds alarm until off.

b. High water: Turns on primary pump in alternating sequence.

c. Off: Turns off primary pump

d. Low water: Shuts down pumping and sounds alarm until off.

2.9 INTERNAL PIPING

A. Schedule 40 PVC Pipe and Fittings:

1. Schedule 40 PVC pipe: ASTM D-1785 with bell and plain spigot welded joints.

2. Application: Buried service between well and vault.

B. Check Valves: Schedule 80 swing check valves suitable for use in raw wastewater.

C. Isolation Valves: Schedule 80 ball valves.

2.10 ODOR CONTROL SYSTEM

A. Dry Air Scrubber System: H2S air filtration system sized according to manufacturer’s recommendations based upon installation configuration.

1. Basis of Design Product: Wager Company sewer vent valves series 1800.

B. Piping: Ductile Iron Pipe with corrosion preventive coating.

2.11 FABRICATION

A. Precast Concrete Structures:

1. ASTM C 478 for precast wells.

2. ASTM C 478 for precast vaults.

3. Fabricate structures with continuous joints to provide watertight construction.

4. Prepare valve vaults with factory installed piping, valves, sleeves, and other devices as required.

B. Guide Rail Assembly: Custom configuration to allow pump lift-out assembly and pump to move from bottom of guide to top of guide without binding. Construct

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lift-out assembly to be easily removable from the top of the guide rail. Configure to match selected pump bracket and coupling.

C. Piping: Manufacturer’s standard piping layout including spools, bends, and tees.

PART 3 – EXECUTION

3.1 EARTHWORK

A. Refer to Section 02300 “Earthwork” for trench excavation and backfilling.

3.2 PRECAST CONCRETE STRUCTURES

A. Install precast concrete structures with sealants per ASTM C 891.

3.3 INTERNAL PIPING

A. Pressure Piping: Install internal pressure piping per pump station manufacturer’s specifications.

1. Install piping with restrained joints at tee fittings and changes in direction. Use corrosion-resistant rods or cast-in-place-concrete supports or anchors.

3.4 FIELD QUALITY CONTROL

A. Perform tests and inspections and prepare test reports.

1. Manufacturer’s Field Service: Engage a pump station manufacturer’s authorized service representative to assist in testing and startup.

B. Tests and inspections.

1. Test completed piping systems according to the requirements of authorities having jurisdiction. Submit reports.

2. After installing wastewater pumping stations and after electrical circuitry has been energized, test pumps and controls for compliance with requirements.

3. After electrical circuitry has been energized, start units to confirm the station can run at pre-specified design parameters.

4. Test piping for leaks and defects.

5. Test and adjust controls and safeties.

6. Force Main: Test pressure at not less than 1.5 times the maximum system operating pressure, but not less than 150 psig.

7. Contractor shall not backfill trench until inspected and approved by the CO or designated representative and instructed to do so.

C. Remove and replace components of the wastewater pumping stations that do not pass tests and inspections and retest as specified above.

07160-1

07160 – Manhole and Septic Tank Sealing

PART 1 - GENERAL

1.1 - Description This section specifies furnishing and installation of a coating system to seal the walls of existing Sanitary Sewer Manholes and Septic Tanks.

1.2 - Related Work Specified Elsewhere

07900 – Caulking and Sealants

1.3 - Approved Manufacturer and/or Installer This specification is based on a designated product and installer. Equivalent products and installers will be acceptable subject to conformity with the salient features of those specified.

(a) Specified Products: The Contractor will submit to the Contracting

Officer for approval: Manufacturers product data specifying compliance with the salient characteristics as provided in this section. Work on this item will not commence until the Contracting Officer has approved these submittals.

(b) Alternate Products: If the Contractor chooses to install an alternate product to those specified herein, the following will be submitted to the Contracting Officer for approval: Manufacturers product data specifying compliance with the salient characteristics as provided in this section.

Work on this item will not commence until the CO has approved these submittals.

1.4 - Measurement and Payment

No separate measurement and payment will be made for the work of this Section.

This work will be considered incidental to Section.

PART 2 - PRODUCTS

2.1 – Water Proof Mortar Coating Material SikaTop Seal 107® is a two-component, polymer-modified, cementious waterproofing and protective slurry mortar for concrete. It is slightly flexible to tolerate fire cracks and suitable in both interior and exterior applications. A minimum of two (2) coats will need to be applyed per manufacturer’s specifications to ensure waterprooffing is achived. Color will be “Grey”.

07160-2

2.2 - Physical Properties

Tensile strength 990 psi Bond Strength 180 psi

Watertightness under hydrostatic pressure (DIN 1048 mod.)

Water Pressure Penetrated Water Water Absorbtion Feet Bar Grains Grams grains (grams) Ft2 ▪ hours (m2▪hours) 16 (0.5) 0 (0) 0 (0) 33 (1) 15 (1) 3 (2) 99 (3) 31 (2) 10 (7)

VOC content None Toxicity None

2.3 – Top Coating Sealant SikaGard 62© is a 2-component, 100% solids, moisture-tolerant epoxy resin. It produces a high-build, protective, dampproofing and waterproofing vapor-barrier system. Sealant will be applied as a top coat for the SikaTop Seal 107©.

Contractor will allow the sealant to cure per manufactureers recomendations.

2.4 - Physical Properties

Tensile strength 5,400 psi Elongation at Break 2.7% Abrasion Resitance 51 liters/mil.

Adhesion Classification 4A Water Absorbtion 0.1% VOC content None when set Toxicity None when set

Color will be “Grey”.

07160-3

PART 3 - EXECUTION

3.1 - Application The Contractor will clean the sides and bottom of the Sanitary Sewer Manholes or Septic Tank of all loose mortar, dust, concrete, efflorescence, etc. prior to application of waterproof mortar.

SikaTop Seal 107© will be spray applied to the manhole or septic tank walls and floor. Application thickness will be a minimum of 40 mils per coat with a minimum of two (2) coats. Theoretical thickness on smooth substrate: 400 sq.

ft/gal. = 40 mils.

SikaTop Seal 107© will be applied by an experienced installer with correct equipment as recommended by the material manufacturer.

Once SikaTop Seal 107© has cured properly Contractor will apply SikaGard 62© to the tank interior floor and walls. Application will be a minimum of two (2) coats.

3.2 - Safety The contractor will apply all Sika® materials according the manufacturer’s safety requirments including any required resperator use.

***END OF SPECIFICATION 07160***

07900-1

07900 - Caulking and Sealants

PART 1 - GENERAL

1.1 - Scope Work Included: Perform all work necessary and required for construction of the project as indicated. Such work includes but is not limited to the following:

(1) Sealants

(2) Caulking

1.2 - Related Work Specified Elsewhere

07160 – Manhole and Septic Tank Sealing

1.3 - Product Handling

Delivery: Deliver sealants and related accessories to the job site in factory sealed, unopened containers bearing manufacturer's name and product designations.

Handling: Follow manufacturer's recommendations for handling products containing toxic materials. Keep flammable material away from heat, sparks, and open flame.

1.4 - Measurement and Payment

No separate measurement and payment will be made for the work of this Section.

This work will be considered incidental to Section.

PART 2 - PRODUCTS

2.1 - Materials

General: All sealants, primers, and accessories will be non-staining to adjacent exposed materials. Use gun consistency compounds unless otherwise required by job conditions. Colors willl be approved by the Contracting Officer.

Silicone Sealant: Use Dow Corning #790 or General Electric "SILPRUF" sealants, or approved equal.

Use General Electric "2400" silglaze or Dow Corning #732 for all other non-concrete sealant, or approved equal.

07900-2

PART 3 - EXECUTION

3.1 - Condition of Surfaces Inspect all surfaces to receive sealant material. Starting work implies acceptance of surfaces as satisfactory by Contracting Officer.

Verify that joints and spaces to be sealed are of proper width.

Apply no sealant materials in contact with surfaces contaminated with oil, grease, bituminous materials, form release agents, bond breakers, deleterious curing compounds, water repellents, and other special surface treatments.

3.2 - Preparation Thoroughly clean all joints, removing all foreign matter such as dirt, dust, moisture, frost, rust, mill scale, paint, lacquer, and protective coatings. Blow all joints free of loose particles.

Use no cleaning solvents which leave residue. Wipe joints free of solvent using clean, dry white cloths or white lintless paper. Do not permit solvent to air dry.

Follow manufacturer's directions for products and surfaces.

3.3 - Installation Unless otherwise required by these specifications, install materials in strict accordance with manufacturer's specifications and recommendations using approved equipment.

3.4 - Patching Patch or replace defective or damaged sealants as directed by the Contracting Officer. The Contractor will be responsible for damage to adjacent surfaces caused by sealant operations.

3.5 - Cleaning Clean adjacent surfaces soiled by sealing operations. Remove wet material before it "sets". Follow manufacturer's recommendations for cleaning procedures. Cleaning agents will not stain or be injurious to exposed surfaces nor will they be potentially dangerous to metal surfaces due to wash-off by rain.

***END OF SPECIFICATION 07900***

G. All excess clean site material not used as part of this project shall be stockpiled as directed by the CO.

B. Where completed compacted areas are disturbed by subsequent construction operations or adverse weather, scarify the surface, reshape and compact to the required density prior to further construction.