Attach_Y.Amend_0002.Spec_22_13_53_Facility_Septic_System.pdf

FACILITY SEPTIC SYSTEM

Section 22 13 53 - Page 1

Daniel Consultants Inc.

SECTION 22 13 53

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

F. Drawings and general provisions of the Contract, and other Division 01 Special Provisions, apply to this Special Provision

G. Related Sections: The following sections in this document contain requirements that relate to this section:

1. Special Provision 33 31 00 “Sanitary Sewerage Utilities."

2. Special Provision 33 34 00 “Pressure Sewer."

3. Special Provision 31 23 33 “Trenching and Backfilling.”

4. Special Provision 03 40 00 “Precast Concrete”

5. Sanitary Pump Station electrical work shall be in accordance with Division 26.

1.2 DESCRIPTION

A. The work to be performed under this section includes all material, labor, tools, equipment, and services necessary for and incidental to the construction of a sanitary pump station including dosing tank as shown on the Drawings and specified herein.

B. The work shall include, but is not limited to:

1. Installation of a sanitary pump station complete with concrete dosing tank, duplex submersible sewage sewage pumps and controls, magnetic flowmeter, valves, piping, electrical conduits, and temporary power for testing pumps, controls, and alarms.

2. All necessary excavation, backfilling; sheeting and shoring; dewatering; testing;

and all incidentals necessary to complete the work

1.3 PUMP PERFORMANCE REQUIREMENTS

A. Pump Pressure Ratings: At least equal to maximum pump-operating pressure.

1.4 SUBMITTALS

A. General: Submit the following according to the Conditions of the Contract and Division 01 Specification Sections.

1. Product data for pipe and fittings, valves, sewage flow meter with remote readout and accessories.

2. Product data for pumps including certified performance curves, weights (shipping, installed, and operating), pump control panel and alarms, conduits, electrical junction boxes, furnished specialties, and accessories. Include startup instructions.

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3. Shop drawings showing layout and connections for pumps. Include setting drawings with templates, directions for installation of foundation and anchor bolts, and other anchorages.

4. Wiring diagrams detailing wiring for power, signal, alarm and control systems differentiating between manufacturer-installed wiring and field-installed wiring.

5. Product certificates signed by pump manufacturers certifying accuracies under specified operating conditions and compliance with specified requirements.

6. Maintenance data for each type and size of valve, meter and pump specified.

7. Pump Accessories: Pump guide rail assembly including intermediate supports, float and pump controls, alarm, valves, and all accessories.

8. Structures: Dosing tank showing dimensions, reinforcing steel, wall sleeves, manhole steps, and piping layout. Also, dosing tank access covers.

9. Performance Tests: Demonstrate that the duplex submersible sewage effluent pumps can operate as specified, installed, and as submitted. Tests shall be performed in the presence of the pump manufacturer's representative during lift station start up.

10. Final Certification: Upon completion of the project and before final acceptance, the Contractor shall deliver to the Engineer a statement signed by the principal officer of the contracting firm stating that the sanitary lift station, and related piping installation is satisfactory and in complete accordance with the contract plans, specifications, and the manufacturer's prescribed procedures and has been found to be tight and in compliance with all State and local codes covering such installations.

1.5 QUALITY ASSURANCE

A. Regulatory Requirements: Comply with provisions of the following:

1. UL 778 "Standard for Motor Operated Water Pumps" for construction requirements. Include UL labeling.

2. NEMA MG 1 "Standard for Motors and Generators" for electric motors.

Include NEMA listing and labeling.

3. NFPA 70 "National Electrical Code" for electrical components and installation.

B. Regulations, Code Requirements, and Permits

1. All work shall be accomplished in accordance with the laws, ordinances, and codes of the State of Maryland and any other local, county, or state governing body having jurisdiction.

C. Single Source Responsibility: Obtain same type of pumps and controls from a single manufacturer with pumps, components, and accessories from a single source. Include responsibility and accountability to answer and resolve problems regarding compatibility, installation, performance, and acceptance of pumps.

D. Design Criteria: Drawings indicate sizes, profiles, connections, and dimensional requirements of pumps and are based on specific manufacturer types and models indicated. Pumps having equal performance characteristics by other manufacturers may be considered provided that deviations in dimensions and profiles do not change the design concept or intended performance as judged by the Engineer. The burden of proof for equality of pumps is on the proposer.

1.6 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Store pump, valves, flow meter, and electrical equipment in a clean, dry location.

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B. Retain shipping flange protective covers and protective coatings during storage.

C. Protect bearings and couplings against damage from sand, grit, and other foreign matter.

D. Comply with pump manufacturer's rigging instructions for handling.

E. The Contractor shall coordinate the delivery and receipt of equipment and materials at the project site so that installation is made in proper sequence and with a minimum loss of time.

F. Equipment and materials shall be stored in a secure temporarily fenced-in area designated by the Engineer.

G. From the commencement of the work until its completion and acceptance by the Owner, the Contractor shall be solely responsible for the storage and care of all equipment and materials and all injury or damage to the same, from whatever cause, shall be repaired by him at his own expense, before the final estimate is made. He shall provide suitable means of protection for all materials intended to be used in the work in progress, as well as for completed work.

1.7 JOB CONDITIONS

A. Visit to Site: All Contractors submitting proposals for installation of a sanitary lift station shall first examine the site of the work and all conditions thereon. The Contractor's attention is directed to the General Provisions.

PART 2 - PRODUCTS

1.2 MATERIALS

A. Pressure Pipe

1. General

a. Polyvinyl chloride (PVC) pressure pipe for low-pressure sewer systems shall be manufactured from PVC compounds meeting the requirements of ASTM D 1784, Class 12454B. Pipe joints shall be as specified herein and elsewhere in the Contract Documents for various locations within piping systems.

b. Solvent-cemented pipe joints at gravity sewage pumps stubs, and where shown on the Plans shall meet the materials and workmanship requirements of ASTM D 2672. Schedule 80 pipe fittings shall have solvent-cemented joints meeting the materials, workmanship and dimensional requirements of ASTM D 2466. Primer shall meet the materials requirements of ASTM F 656. Solvent cement shall meet the materials requirements of ASTM D 2564.

c. Rubber gaskets for gasketed joints shall meet the materials requirements of ASTM D 477. Gaskets and lubricants shall be made

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Section 22 13 53 - Page 4 from materials that are compatible with the pipe material and will not support bacterial growth.

2. Pressure sewer pipe shall be pressure rated SDR 21 pipe meeting materials, design, test, certification, and marking requirements of ASTM D 1785 or Schedule 80 pipe meeting the materials, design, test, certification, and marking requirements of ASTM D 1785. Pressure sewer mains 1 ½inch diameter and larger, unless otherwise shown in the Contract Documents shall have gasketed joints in accordance with ASTM D 3139. Sewage sewage pump discharge pipe smaller than 1 ½-inch diameter shall have solvent-cemented joints. Threaded connections to schedule 80 pipe shall only be made using solvent-by-threaded adapters.

3. Pressure sewer fittings shall be Schedule 80 IPS fittings conforming to the materials, design, test, certification and marking requirements of ASTM D 1785.

4. Threaded pipe and fittings shall be Schedule 80 Physical dimensions and tolerances of PVC Schedule 80 pipe shall conform to ASTM D 1785. Threaded Schedule 80 fittings shall conform to ASTM D 2464.

5. Valve/Meter Accessories:

a. Plug Valves: Sewage pump isolation valves shall be eccentric plug type rated for 175 psi with cast iron body, bonnet and plug, flanged ends, stainless steel bearings and lever operator. The plug valves shall be Series 100 by Dezurik or approved equal.

b. Ball Valves: Class 150, 600 psi CWP, ASTM B 584 bronze body and bonnet, 2-piece construction, chrome-plated brass ball, conventional port, blowout-proof, bronze stem, Teflon seals and seats, and soldered connections. The valve shall have a vinyl-covered steel level handle.

c. Check Valves: PVC Schedule 40 Spring Check Valve

d. Magnetic Flowmeter: 2-inch flange in-line type magnetic flowmeter with remote readout equal to Omega FMG600 series. Magmeter shall be designed for use with low pressure pumped wastewater (35 gpm @ 29 TDH) system. Magmeter shall not have any moving parts and shall be PTFE lined.

e. Pipe and Fittings: Piping inside tank shall be Schedule 80 PVC with flanged fittings as shown on the Drawings.

B. Concrete Tank:

1. A 1,000-gallon (minimum capacity) dosing tank in accordance with ASTM C1227.

2. The dosing tank be in conformance with 03 40 00- Precast Concrete and shall consist of a precast reinforced concrete tank constructed to the dimensions shown on the plans.

3. Openings through wall for inlet and outlet pipes shall be constructed as detailed on the plans. The tank shall be capable of supporting a HS-20 vehicle load.

Dosing tank access shall as detailed on the plans. Installation shall be in accordance with manufacturer's instructions.

4. Mechanical Type Link Seals: For all wall penetrations, provide mechanical type link seals where indicated on the plans. Provide seal material of EPDM with stainless steel nuts and bolts.

C. Drain Field:

1. Polyvinyl chloride (PVC) pipe, ASTM D 2729, perforated

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2. Clean stone, gravel, slag, or similar material acceptable to Administrative Authority , varying in size from 3/4" to 2-1/2".

3. Untreated building paper, straw, hay, pine needles, or similar porous material to prevent closure of voids with earth backfill..

D. Pump:

1. General. Contractor shall furnish all labor, materials, equipment, and incidentals required to provide a duplex pumping system specified herein. The system shall be the same manufacturer as supplying the pump and motor control panel so as to insure suitability and assurance of experience in matching the equipment together and to insure single source responsibility for the equipment. System shall consist of two sewage effluent pumps, level control switches, discharge plumbing with hydraulically sealed discharge flange, pump mounting plates with bottom and upper rail supports, lifting chain, pedestal mount and cord sealing plate for NEMA 4 junction box; to be installed in dosing tank. A NEMA 4X weatherproof control box shall be supplied for mounting above the lift station as shown on the Drawings.

Each pump shall be lowered into position or raised for inspection on two vertical stainless steel pipe rails without the need to enter the dosing tank or disconnect piping or electrical connections.

A. Duplex Submersible Sewage Effluent Pumps:

a. Each pump shall be rated 2.0 H.P., 230 volts, single phase, 3450 RPM, and shall produce 130 U.S. GPM at 23.7 feet TDH. Each pump shall be effluent submersible type including seal failure sensor probe. Pumps shall be Model WE2012H as manufactured by Gould or approved equal.

b. The pump volute, motor, and seal housing shall be high quality gray cast iron, ASTM A 48, Class 30. All external mating parts shall be machined and Buna N Rubber 0-ring sealed on a beveled edge. Gaskets shall not be acceptable. Shaft shall be stainless steel. All fasteners exposed to the pumped liquids shall be 300 series stainless steel. Furnish pump with 30’ power cord consisting of conductors with PVC jacket.

B. Pump Accessories:

a. Dosing tank Level Controls: Float switches shall be supplied to control dosing tank level and alarm signal. The switches shall be sealed in a solid polypropylene float for corrosion and shock resistance. The support wire shall have a heavy neoprene jacket. A weight shall be attached to cord above the float to hold switch in place in sump and efficiently prevent sharp bends in the cord when the float operates. A quantity of three floats shall be provided to control level. An additional switch shall be provided with high level alarm. Provide stainless steel support float guide pipe to hold float switches at the required height.

b. Operation of Duplex Pump System: On dosing tank level rise, lower switch shall be energized, then upper level switch shall next energize and start lead pump. With lead pump operating, sump level shall lower to low switch turn-off setting and pump shall stop. Alternating relay shall index on stopping of pump so that lag pump will start first on next operation and become lead pump. If dosing tank level continues to rise when lag pump is operating, override switch shall energize alarm switch and signal high level alarm. If level continues to rise, both lead and lag pump shall operate together until low level switch turns off both pumps. If

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Section 22 13 53 - Page 6 one pump should fail for any reason, the second pump shall operate on the override control and if level rises above override control, alarm shall signal.

c. Pump Discharge Piping: The discharge piping shall be stainless steel pipe and shall include hydraulically sealed discharge flange for each pump. Discharge pipes from pump station valve/meter tank shall be fitted with stainless steel by PVC pipe connections.

G. Electrical Equipment

1. Motor Control Panel: Contractor shall furnish all labor, materials, equipment, and incidentals required to provide duplex motor control panel as specified herein.

The motor control panel shall be assembled and tested by a shop meeting UL Standard 508 for industrial controls. The motor and control panel shall be assembled and tested by the same manufacturer supplying the pump so as to insure suitability and assurance and experience in matching controls to motors and to insure single source responsibility for the equipment. The controls for the pumps shall be contained in a non-corrosive enclosure meeting NEMA 4X requirements and shall be stainless steel and include an external alarm light and horn activated by pump failure or high water level in dosing tank. The control panel shall also include a main non-fused disconnect and phase failure protection. Motor control panel shall be the NOVUS Series 2000 as manufactured by Hydromatic or approved equal.

a) Run lights and hand-off-auto switches shall be provided and mounted on an electroplated bright zinc with clear chromate finish steel bracket. The run lights and hand-off-auto switches shall be properly labeled as to function.

b) Each sewage pump shall be served by a 120/240 volt, single phase, 3 wire sub-panel The incoming power shall be 230 volts, 1 phase, 60 hertz service.

c) Circuit breakers shall be used to protect from line faults and to disconnect the pumps from the incoming power. Circuit breakers shall be thermal magnetic and sized to meet NEC requirements for motor controls. Service entrance circuit breaker shall be 2 wire, solid-neutral, 30 ampere, 120/240 volt circuit breaker, UL listed for service entrance, mounted in a NEMA 3R raintight enclosure. Raintight hubs for conduit entrances shall be provided. The enclosure shall contain neutral and equipment ground bars or studs. The cover or door of the enclosure shall have provision for padlocking. The circuit breaker shall be as manufactured by Square D Company, Cutler-Hammer or Owner approved equal. The breaker shall be furnished with a handle locking device. Circuit Breakers: One 2 pole, 20 ampere unit; one single pole, 15 ampere unit; and one single pole, 15 ampere ground fault interrupter G.F.I. breaker

d) A duplex pump controller shall be provided for control logic. Pump controller shall be solid state utilizing a printed circuit board to avoid conventional wiring. The printed circuit board of the pump controller shall be made of UL listed materials.

e) Alarm lights and horn with silencer button for indication of pump failure and high/low water alarms shall be mounted external to control panel and shall be weatherproof. The alarm relay shall have a 120 volt, 60 hertz operating coil and one normally-open and one normally-

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Section 22 13 53 - Page 7 closed contact. Relay shall be Magnecraft W388ACQX4. A 100 decibel, 120 bolt AC horn, Edwards No. 123A

f) Control panel shall be mounted on existing electrical panel supports adjacent to the dosing tank.

g) A 2 pole, 2 wire, 15 amp, 120 volt, NEMA 5-20 R GFI Receptacle;

Arrowhart GF5242-X1

h) Single conductors shall be stranded copper with type THWN insulation. Cables installed underground shall be type UF. Conductor size shall be as noted on the Approved Installation Details or Plans.

Grounding electrode conductors shall be insulated. Equipment grounding conductors shall be insulated. Insulated equipment grounding conductors shall have green-colored insulation

2. Conduit: Except as otherwise noted, conduit and fittings shall be Schedule 40 polyvinyl chloride, conforming to UL Standard 651 and manufactured by Carlon, Hatfield Wire and Cable, or Owner approved equal. Rigid galvanized electrical metallic tubing shall conform to ANSI Standard C80.3 and shall be manufactured by Republic Steel Corporation, Triangle PWC Incorporated, or Owner approved equal. Fittings shall be watertight, compression type, manufactured by Thomas and Betts, OZ/Gedney Company, or Owner approved equal.

G. Nuts, bolts, screws, etc. shall be Type 304 stainless steel.

H. Metal detection tape shall be a printed polyethylene tape with a metallic core. The tape shall be furnished with an appropriate message imprinted on a colored background warning of buried sewer or electric line.

PART 3 - EXECUTION

1.3 SITE PREPARATION

A. Site preparation shall be done in accordance with 31 10 00 for Site Clearing

1.4 EARTHWORK

A. All earthwork required shall be done in accordance with 31 23 33 Trenching and Backfilling.

1.5 INSTALLATION

A. General:

1. The Contractor shall furnish all materials, perform all excavation and backfill, construct all necessary joints and connections, construct all appurtenances, dispose of all surplus excavation and discard materials as may be necessary to complete the dosing tank station. all materials and equipment shall be installed complete in a first class manner and in accordance with modern methods and practice. Any material or equipment installed which does not present an orderly and reasonably neat or workmanlike appearance shall be removed and replaced when directed by the Engineer. The removal and replacement of this work shall be done at the Contractor's expense.

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2. Removal of Water: The Contractor shall at all times during construction provide proper and satisfactory means and devices for the removal of all water entering the excavated area, and he shall remove all such water as fast as it may collect to avoid interference with the prosecution of the work of the proper placing of pipe, masonry, or other materials.

3. Delivery, Handling, and Storage of Materials: Inspect materials delivered to site for damage. Unload materials with minimum handling and store on site in enclosures or under protective covering. Do not store materials directly on the ground. Keep inside of pipes and fittings free of dirt and debris. Handle pipe, fittings, valves, and other accessories in such manner as to ensure delivery to the trench in sound undamaged condition. Take special care to avoid injury to coatings and linings on pipe and fittings; make satisfactory repairs if coatings or linings are damaged. Carry pipe to the trench; do not drag it.

B. Excavation:

1. The Contractor shall excavate, protect, and backfill all excavation that may be necessary for completing the work under the contract. Sheeting, shoring, and hand excavation shall be done as may be necessary for the protection of the work and for the safety of personnel in accordance with local, State, and Federal regulations including OSHA.

2. 2. All sheeting in excavations shall be withdrawn as the backfilling is being done.

The Contractor shall cut off any sheeting left in place. at least 18 inches below finished grade and shall remove the material cut off without compensation therefore.

3. All excavations must be kept free of water below the subgrade of the work while work is in progress. This may be accomplished by ordinary pumping methods, use of underdrains, or by well points, whichever will produce the required results.

C. FIELD QUALITY CONTROL

1. Testing:

a. General: All testing must be done in the presence of a representative of the Owner’ representative and local and State inspectors having authority.

Notice of applying such tests shall be given a minimum of three (3) days in advance. Contractor shall provide temporary power, if required, by means by standby generator or other approved methods. If any imperfections or leaks are detected by the tests, they shall be corrected by repair or replacement of defective materials as directed by the Engineer and then retested.

b. Hydrostatic Testing: The pump discharge pipe lines shall be filled with water, supplied by the Contractor, as directed by the Engineer and the pressure raised to obtain a minimum test pressure of 50 psi for sanitary force main. This test pressure shall be maintained for 30 minutes. Should this test show or cause any defects, such defects shall be remedied by the Contractor and the pipe shall be retested by him. This procedure shall be repeated until the test requirements have been met. The Contractor shall make any and all repairs that may be necessary until the leakage test requirements have been met.

c. Pump Testing:

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1) The pumps shall be tested at start-up by a qualified representative of the manufacturer. A start-up report as provided by the manufacturer shall be completed before final acceptance of the pumps.

2) The pumps shall be visually inspected to confirm conformance with the specification as to HP, voltage, phase, and hertz.

3) The motor and seal housing chambers shall be hipotted to test for moisture content and/or insulation defects.

4) Pumps shall be allowed to run dry to check for proper rotation.

5) Discharge piping shall be attached, the pump submerged in water and amp readings shall be taken in each leg to check for an imbalanced stator winding. If there is a significant difference in readings, the stator windings shall be checked with a bridge to determine if an unbalanced resistance exists. If so, the stator will be replaced.

6) Test safety shutdowns in the presence of the Engineer and manufacturer's representative.

d. Dosing tank Water Tightness Test:

1) Test the dosing tank for leakage as follows:

(a.) Fill structure with water and watch for any drop for 24 hours.

(b.) Refill as necessary and watch for any drop in 60 minutes.

e. All testing of the entire dosing tank station and connecting piping system must be completed and accepted prior to making final connections and placing pump station into service.

D. Placement of Pipe:

1. Solvent-Cemented Polyvinyl Chloride (PVC) Pipe Joints: Solvent-cemented polyvinyl chloride (PVC) pipe joints shall be assembled only by personnel knowledgeable and experienced in properly making solvent type joints in accordance with the solvent cement manufacturer's recommendations, as specified in ASTM D 2855, and as detailed herein.

a. Ends shall be cut square with the pipe axis using a fine-tooth hand or power saw. Pipe cutters not specifically designed for cutting plastic pipe or that raise a burr or ridge at the cut end of the pipe shall not be used.

Cut ends shall be chamfered and deburred prior to joint assembly.

b. Surfaces to be joined shall be cleaned and free of dirt, moisture, oil and other foreign material. Cleaning shall be accomplished by wiping with a clean dry cloth, a chemical cleaner, or mechanical means. The surface temperature of the mating surfaces shall not exceed 110 F at the time of assembly. Pipe and fittings shall be shaded from direct exposure to the sun prior to assembling the joints if required.

c. The inside socket surfaces and the male end of the pipe shall be softened by application of one or more coats of primer. After the surfaces have been softened, and while still wet with primer, cement shall be applied to both surfaces in a uniform and even manner, taking care to keep excess cement out of the socket. Immediately after applying the last coat of cement to the pipe, and while both the inside socket surface and the outside surface of the male end of the pipe are soft and wet with solvent cement, forcefully bottom the male end of the pipe in the socket.

Turn the pipe or fitting one-quarter turn during assembly to distribute the

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Section 22 13 53 - Page 10 cement evenly. Hold the joints firmly together until the cement has received its initial set.

d. Handle newly assembled joints carefully until the cement has gone through the set period. Set time shall be in accordance with the manufacturer's recommendations or the following, whichever is longer:

Minimum Time Ambient Temperature

30 minutes 60 to 100 F

1 hour 40 to 60 F

2 hours 20 to 40 F

4 hours 0 to 20 F

Pressure testing shall not be conducted until at least 24 hours after solvent cement joints have been assembled.

e. After the set period, the pipe shall be carefully placed in the trench

2. Threaded Polyvinyl Chloride (PVC) Joints: When threaded polyvinyl chloride (PVC) joints are called for in the Contract Documents, the following procedures shall be followed:

a. Male and female threaded areas shall be clean and free of sand and dirt.

b. Joints shall be lubricated and sealed with non-hardening pipe dope or

Teflon (R) tape.

c. Special care shall be taken when starting threads to prevent cross threading.

d. Hand tighten joint first, then wrench tighten only enough to produce a leak-free joint.

3. Place according to manufacturer's literature and 31 23 33 Trenching and Backfilling.

B. Dosing Tank:

1. General: Install as indicated, and in accordance with manufacturer’s installation instructions

2. Excavate in accordance with 31 23 33 Trenching and Backfilling for work of this

Section. Hand trim excavation for accurate placement of tank to elevations indicated.

3. Place bedding material level in one continuous layer not exceeding 6 inches compacted depth, compact to 95 percent.

4. Backfill around sides of tank, tamped in place and compacted to 95 percent.

5. Maintain optimum moisture content of bedding material to attain required compaction density.

6. Install dosing tank and related components on bedding.

7. Tests: Fill septic tank with water and let stand overnight. If water level recedes, locate and repair leaks, and retest

C. Seepage System:

1. Drainage Piping: Lay drainage piping solidly bedded in filtering material.

Provide full bearing for each pipe section throughout its length, to true grades and alignment, and continuous slope in direction of flow.

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a. Lay perforated pipe with perforations down and joints tightly closed in accordance with pipe manufacturer’s recommendations. Provide collars and couplings as required.

b. After drainage lines have been installed, place additional filtering material around sides and top to compacted depth as indicated or, if not indicated, to compacted depth of 8" above top of pipe.

2. Testing Drainage Lines: Test and check lines before backfilling to assure free flow. Remove obstructions, replace damaged components, and retest system until satisfactory.

3. Filter Mat: Prior to back-filling, place filter mat over filter material.

4. Backfilling: Immediately backfill trench with excavated soil, mounding but not compacting soil above original grade. Do not permit construction equipment on backfilled trenches.

1.3 CLEANING

A. General: Clean all parts of the system before final acceptance.

END OF SECTION 221353

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