1240LU24Q0046 Attachment 3 Specifications Lift station Buffalo Gap CG and Septic DPG.pdf

mmsandall Stamp

Replace all inner workings of the lift station.

Remove existing floats and attachments and install with new, fully functional system.

Clean and remove all foreign debris from tank

Lift station must be tested and work correctly at completion

Replace concrete lid and metal door:

Install new concrete cap with an equal sized aluminum door that allows identical or improved access to the system. New lid can be designed to accommodate the new pumps, controls, and control box.

EFFLUENT PUMPING SYSTEM 15351-1

SECTION 15351 - EFFLUENT PUMPING SYSTEM

PART I - GENERAL

1.1 RELATED WORK SPECIFIED ELSEWHERE

A. Precast Concrete Wet Wells - Section 03424.

B. Electrical Work for Effluent Dosing Station - Section 16440.

1.2 SCOPE

Work under this section includes the installation of two (2) sewage effluent pumps with lift-out double guide rail system, duplex pump control panel, and float controls in a 72-in. diameter concrete wet well.

PART 2 - PRODUCTS

2.1 SEWAGE EFFLUENT PUMPS

A. Submersible sewage double seal effluent pumps capable of passing 3/4 inch spherical solids, 1/2 horsepower, 208 VAC, single phase, 60 Hz, 3450 rpm motor.

1. Existing pumps are Meyers, ME50D-21 – or equivalent pumping 68 gpm at a TDH of 30’.

B. Capable of operating over the full range of the performance curve without overloading the motor.

Motor shall have an overload element attached to the motor winding to protect the motor against overcurrent and overheating conditions. The overload element shall automatically reset when the motor cools.

C. Shaft Seal: Motor shall be protected by two rotating mechanical shaft seals mounted in tandem with an oil-filled chamber separating the seals. Seals shall have carbon and ceramic seal faces. Metal parts and springs of seals shall be stainless steel. The motor shall have two bearings to support the rotor; an upper ball bearing to accommodate radial loads and a lower ball bearing to take thrust and radial loads. Ball bearings shall be designed for a B-10 life of 50,000 hours.

D. Pumps shall be equipped with seal leak probes to detect water leakage past the lower seal. The sensing probes shall be connected to a warning light in the duplex control panel. The warning light shall serve to indicate a seal leak condition and shall not stop the pump.

E. The power cord shall be single length, without splices or junction box, between the pump motor and the duplex control panel. Individual wires shall be potted into a connector with epoxy and the jacket on the power cord shall be sealed with a compression coupling at the motor.

F. Two vane, enclosed type impeller, bronze construction, threaded onto a stainless steel pump/motor shaft.

G. Corrosion resistant pump construction such as painted cast iron volute and motor housing. Two inch NPT discharge fitting. All exposed fasteners to be stainless steel.

H. Pump shall be capable of pumping 67 gallons per minute against a total pumping head of 19 feet of water.

I. Pump shall be Myers ME50D-21 double seal effluent pump or approved equal.

EFFLUENT PUMPING SYSTEM 15351-2

2.2 LIFT-OUT RAIL SYSTEMS

A. Shall be dual guide rail lift-out rail system with lift-out ball check valve, positive machine fit with BUNA-N o-ring seal on disconnect fitting to allow removal of effluent pump without disassembling piping. Two inch NPT inlet and outlet.

B. Painted cast iron mounting base, pump carrier, sealing plate, and elbow. Corrosion resistant construction with stainless steel components including lifting chain, 3/4 in. Schedule 40 stainless steel guide pipes, top rail mounting bracket, pump guide plate, and fasteners.

C. Myers SRA-200-CV lift-out rail system with specified options or approved equal.

2.3 DUPLEX PUMP CONTROL PANEL

A. Shall be furnished by the manufacturer of the sewage effluent pump.

B. Pump control panel to have the following features:

1. NEMA 4X fiberglass enclosure with aluminum back panel.

2. Full inner door.

3. IEC contactor, silver cadmium oxide contacts rated at over 1 million cycles.

4. Main circuit breaker.

5. Control circuit fuse.

6. Alarm circuit fuse.

7. Hand-Off-Auto switch, momentary in-hand position.

8. Alarm light, nominal 3 in. high by 3 in. diameter red globe with 40 watt bulb, solid state thermal flasher. Mounted on top of enclosure.

9. Acknowledge alarm circuit, includes alarm bell and exterior alarm silence and acknowledge button.

10. Pump run light, amber.

11. Seal leak light, red.

12. Terminal blocks for pump and float connections.

13. Ground lug.

14. Alarm light - nameplate mounted through enclosure front.

15. Alarm buzzer, 90 db at 10 feet.

16. Elapsed time meter, non-resettable 6 digit, displays hours and tenths.

17. Cycle counter, non-resettable 6 digit, displays pump starts.

18. Lightning arrestor.

19. Auxiliary contacts for remote alarm light

C. Shall be Myers duplex electrical control panel CMEP(SL)-21SW with specified options or approved equal.

2.4 REMOTE ALARM LIGHT

1. NEMA 4X enclosure for exterior mounting, weather-proof red globe with 40 watt bulb, solid state thermal flasher. Shall be Myers RA-11W alarm light with add-on thermal flasher.

2. To be installed on top of enclosure

2.5 PUMP CONTROL PANEL MOUNT

Provide factory manufactured control panel mounting stand for mounting duplex pump control panel on concrete cover of effluent lift station. Minimum two inch diameter galvanized steel pipe support stand with 3/8 inch thick mounting plate mounts to concrete cover with four 3/8 in. diameter stainless steel bolt anchors. 54 to 60 inches to top of support. Includes two steel angle supports and stainless

EFFLUENT PUMPING SYSTEM 15351-3

steel hardware. Support stand and angle supports shall be coated with baked-on epoxy paint. Grass green color. Myers MS-X or equal.

2.6 LIQUID LEVEL CONTROLS

A. Mercury switch encased in polyproplylene float ball, complete with cord weight to hold control at desired level, designed for immersion in liquid sewage effluent. Normally open or normally closed as required, suitable for alarm or pilot duty.

B. Factory installed conductors shall be of sufficient length to run splice-free from float ball to control box.

C. Stainless steel support bracket with adjustable cord snubbers for controls in wet well, bracket CSB4-SS as manufactured by Myers or equal.

D. Liquid level controls shall be Myers Mini-float, 25 foot cable, type S-M or approved equal.

2.7 PVC PIPING IN LIFT STATION WET WELLS

A. Schedule 80 Polyvinyl Chloride (PVC) pipe meeting latest version of ASTM D 1785.

B. Schedule 80 Polyvinyl Chloride (PVC) threaded pipe fittings meeting latest version of ASTM D 2464.

C. Schedule 80 Polyvinyl Chloride (PVC) tapered socket pipe fittings meeting latest version of ASTM D

2467.

2.8 SOLVENT CEMENT AND PRIMER

A. Primer for use in solvent cement joints of PVC plastic pipe and fittings, pigmented, meeting latest version of ASTM F 656.

B. Solvent cement for PVC plastic pipe and fittings, meeting latest version of ASTM D 2564.

PART 3 - EXECUTION

3.1 SEWAGE EFFLUENT PUMP AND LIFT-OUT RAIL SYSTEMS

A. Install sewage effluent pump and lift-out rail system in accordance with the manufacturer's recommendations and the contract drawings.

B. Verify location of lift-out rail system to ensure that pump can easily be removed through the aluminum access door on the precast concrete lift station covers.

C. Mount lift-out rail system on 30 inch x 48 inch opening in precast concrete cover of wet well with stainless steel stud-style anchors, minimum size and number as recommended by the manufacturer.

3.2 WET WELL PIPING WITH SOLVENT CEMENTED JOINTS

A. Install schedule 80 PVC piping in wet well as shown on the drawings.

B. Cut pipe square using miter box or plastic pipe cutting tool.

C. Remove all burrs from end of cut pipe.

D. Prime mating surfaces of pipe and fitting to soften PVC material.

EFFLUENT PUMPING SYSTEM 15351-4

E. Apply liberal coat of cement rapidly with a brush or roller pipe to the mating surfaces of the pipe or fitting. Avoid excess cement inside the fitting and don’t put cement beyond the shoulder of the fitting.

F. Assemble parts quickly while cement is still fluid. Push pipe fully into fitting with a turning motion until it bottoms out in socket. Hold parts together for a minute and wipe off excess cement.

3.3 DUPLEX PUMP CONTROL PANEL MOUNTING

A. Install new duplex pump control panel on structure. Mount panels level with number of anchors as recommended by panel manufacturer.

B. Install new branch circuits and control circuits in raceway as specified in Section 16440 – Division 16.

3.4 LIQUID LEVEL CONTROLS

Install stainless steel mounting brackets in 30 inch x 48 inch openings in concrete covers of wet wells with stainless steel stud-style anchors as shown on the drawings to support the level control float switches and the pump power cords. The mounting brackets shall be equipped with adjustable cord snubbers.

3.5 OPERATIONAL SEQUENCE

A. Duplex operation of the single effluent pump.

B. Two level control switches plus high water alarm switch. Lower switch is "Pump Off." Next switch is

"Pump On." Highest switch is "High Water Alarm”.

C. High water alarm will activate alarm light and bell at pump control panel.

D. Provide a control scheme that allows switching the lead/lag pump. Upon installation, pump schedule should be set to alternate lead/lag pumps.

3.6 OPERATIONAL TEST

After installation is complete, an operational test of the effluent dosing station and controls shall be conducted in the presence of the CO. Verify that all equipment and controls operate as intended.

Complete adjustments as required.

END OF SECTION 15351

EXIST. FUSED 1 DISCONNECT L-,--✓-

Ven!

I�- ---------------------------------J --------------J

INSTALL PUMP CONTROL PANEL

WITH PEDESTAL PANEL

MOUNTING.

_INSTALL BRACKET FOR

FLOAT SWITCHES. LOCATE

SO FLOAT OPERATION IS NOT

IMPACTED BY INFLUENT

THROUGH INTAKE PIPE.

--H�-----::-INSTALL TWO 1/2 HP SEWAGE EFFLUENT

PUMPS WITH LIFT-OUT DOUBLE GUIDE

RAIL SYSTEMS, FLOAT CONTROLS, AND

DUPLEX PUMP CONTROL PANEL. SEE

PAGE 6 FOR PLUMBING SCHEMATIC.

EXIST. FUSED"

DISCONNECT �

CEMENT GROUT AROUND

PIPE THROUGH EXIST.4"

DRAIN LINE OPENING IN

72" RCP WALL.

ALA..'tlM LEVEL

2 PUMPS ON LEVEL

1 PUMP ON LEVEL

BY

i'.,..� I I I I I

PLAN

EXIST.

LINE

ELECTRICAL

�I ,·;

\ ,, -: � INSTALL PUMP CONTROL PANEL

WITH PEDESTAL PANEL

MOUNTING.

__--3 0" UNLESS OTHERWISE

RECOMMENDED BY PUMP

MANUFACTURER.

EXIST. ACCESS FRAME

WITH DOUBLE DOORS

1/2 HP SEWAGE EFFLUENT PUMP

WITH LIFTOUT DOUBLE GUIDE

RAIL SYSTEM (2)

-EXIST. 72" CONCRETE

PIPE WET WELL

-ADAPT 2" GALV. STEEL

TO 2" PE OR PVC EFFLUENT

FORCE MAIN.

SIDE SECTION'

SCALE 3/8" = 1'-0"

SCALE 3/8" = l'-0"

ApprO-.,.illla - --------- --------

U.S. DEPARTMENT OF AGRICUl TU Rf

FOREST SERVICE

NORTHERN REGION

EFFLUENT PUMP

STATION

This is a reference drawing - actual dimensions and conditions may differ in the field

333219-1

SECTION 333219

SEWER LIFT STATION VAULT STRUCTURE

PART 1 GENERAL

1.1 SCOPE

A. This section covers the construction and installation of the pre-cast concrete lift station lid.

PART 2 MATERIALS

2.1 LIFT STATION VAULT

A. The lift station vault shall consist of a 6-foot (72-inch) diameter pre-cast concrete manhole barrel sections as shown on the drawings and details. Replace the concrete lid and access hatch.

2.2 FLEXIBLE COUPLING

A. N/A

2.3 ACCESS HATCH

A. The access hatch shall be fabricated from welded aluminum sections. A hinged aluminum door shall be provided for the pumps.

The hinged door shall be fabricated from 1/4" thick aluminum with non-skid diamond tread on upper surface. All hardware on access assembly shall be stainless steel with a flush upper surface without protrusions. For safety, the door shall have a 625 lbs/sq. ft. rating and be fitted with a recessed staple for padlock. Door shall be furnished with a flush aluminum drop handle and automatic hold open arm. Access door shall be a Halliday Products Series F1R3042 aluminum door or approved equal.

1.2

B. All work necessary for a complete and usable system

SCOPE

333219-2

2.4 LIFT STATION VAULT VENT

A. Maintain existing vent

2.5 INTERIOR SURFACE FINISH

A. White, water-proof, Cementitious Coating. Interior lift station vault walls and floor shall receive a cementitious coating. The material shall meet Federal Specification TT-T-21 Type 2B and NSF Standards. The material shall be applied as per the manufacturer’s recommendation for ordinary walls. A material that conforms to this “Cementitious Coating” is “Eucoseal” as manufactured by the Euclid Company, Cleveland, Ohio. An acrylic latex-bonding admixture mixed with 3 parts of water and used in place of mixing water shall be used to bond the Cementitious Coating to the dense concrete. Coating shall be cured as per manufacturer’s specifications. If coating is applied with a brush, then it shall be finished to give a uniform-looking surface with vertical brush marks.

PART 3 WORKMANSHIP

3.1 GENERAL

A. All items shall be installed per drawings and specifications.

Excavation, backfill, pipe embedment, surface replacement, and appurtenant work shall be in accordance with pertinent sections of the specifications, Section 312316.16 – Structure Excavation and Compaction for Minor Structures, Section 312333 – Trenching and Backfilling and Section 333220 – Lift Station Effluent Pumping System.

B. The Contractor shall be responsible for setting the lift station vault to proper elevation. The inlet pipe elevation is shown on the plans, and shall be used to set the lift station vault to proper elevation.

C. OSHA regulations regarding proper excavation procedures shall be followed.

D. Curing compounds shall not be used on the interior walls and floor of the lift station vault.

E. The pre-cast concrete lift station vault structure shall be installed as

333219-3 shown on the drawings and specified herein. The lift station vault shall be installed on a level base of bedding material at the thickness shown on the drawings. The bedding material base shall be installed on undisturbed original subsoil. All unauthorized excavation below the bedding material shall be replaced with 2 ½ inch minus drain rock. The lift station vault bedding material shall be compacted to 95% of theoretical maximum proctor density as determined by AASHTO T-99, except when greater density is recommended by the lift station vault manufacturer.

3.2 LEAKAGE TESTS

A. The lift station vault shall be subject to field leakage tests as specified herein. The CO shall be provided 48 hours notice of field leakage test times. All field leakage tests shall be witnessed by the CO. If the lift station vault fails the leakage test, it may be rejected by the CO. When leakage occurs, if the lift station vault is not rejected by the CO, an additional water test for a minimum of two

(2) hours shall be made on the lift station vault after repairs have been completed. Water for testing shall be furnished by the Contractor.

Leak test shall be 1 gallon per foot of height per 24 hours

B. After the lift station vault has been set, water filling may commence.

The lift station vault shall be filled with water to the top of the lift station vault access hatch. The Contractor shall allow adequate time for lift station vault walls to absorb water. The lift station vault shall then be tested for exfiltration over a two (2) hour period. Any water loss will not be acceptable. No domestic sewage effluent shall be allowed in the lift station vault until after the start-up procedure has been performed and approved in the presence of the CO.

3.3 LIFT STATION VAULT BACKFILL

A. N/A

333219-4

3.4 COMPRESSION COUPLINGS

A. N/A

3.5 PAINTING

A. N/A

PART 4 MEASUREMENT AND PAYMENT

4.1 Payment will be made under:

Pay Item Description Pay Unit

A Lump sum lid replacment and control panel and alarms.

333219(01)A - The 72” diameter precast lift station shall be measured by lump sum. Payment shall include furnishing the concrete materials, piping, hatch, guide rail system and appurtenances, testing the tank, lid, provide power to lift station from power source with explosion proof fittings or seal offs, control panel and alarms, and connection to the inflow gravity piping and outflow gravity or pressurized piping as required on the plans and specificaiton for Schedule A – Base bid by the contractor.

END OF SECTION

3.2b – Install Risers – Buffalo Gap CG and Septic

Description of work

Part 2)

b) Locate, fully pump, and inspect four (4) existing septic tanks Report findings of inspection, including pictures and measurements to CO

c) Install grade rings on existing tank access holes.

Locate the access lids on the existing septic tanks and install grade ring inserts and grade rings to extend risers above grade with a cover secured with vandal resistant screws. Complete work for both Comfort Stations in the Campground. One Comfort Station is located in Loop A, and one is located in Loop B. There are two 1,250 gallon tanks at each location.

Locate both access holes (solid and liquid) to the septic tanks (2 -1,250 gal tanks) associated with the comfort stations shown below.

• Depth is anticipated to be less than 5’

• Install adequate rings to bring risers above grade

• Slope ground away from risers.

• See drawing on next page. Drawing is assumed to represent existing tanks, but may not be totally accurate.

• Use caution when digging to locate tank access holes. Electric line may be located in the area of the septic tanks.

3.2b – Install Risers – Buffalo Gap CG and Septic

Previous design image, actual conditions may vary.

Install Grade ring insert and grade rings to extend riser above ground surface. Acceptable product is Orenco 18” GR, GRI or approved equal. Use 2-part epoxy adhesive, Locktite PL Premium Construction Adhesive, or product recommended by manufacturer to bond concrete to grade ring insert and to riser pipe.

Lid shall be 18” HDPE or similar, secured with vandal resistant screws, Typ., Polylok 3007-HDC or approved equal.

Slope ground away from riser

EXISTING SEPTIC TANK DETAIL

NO SCALE