SECTION 02671

WATER WELL

PART	GENERAL

SECTION INCLUDES

Drilling and casing water well.

Pump and controller.

Water and system testing and certification.

RELATED SECTIONS

Section [______-____________]: Geotechnical report on subsoil conditions.

Section [02225 - Trenching] [02222 - Excavating]: Excavating for conduit and pipe from well head to building.

Section [02225 - Trenching] [02223 - Backfilling]: Backfilling for conduit and pipe from well head to building.

Section 02675 - Disinfection of Water Distribution Systems.

Section [______-____________]: Water storage tank.

Section 16111 - Conduit.

Section 16123 - Building Wire and cable.

UNIT PRICE - MEASUREMENT AND PAYMENT

Water Well:

Basis of Measurement (Base Bid): By the vertical [foot] [________] ([meter] [________]) of well depth identified in Contract Documents.

Basis of Measurement (Change in Well Depth): By the vertical [foot] [________] ([meter] [________]) of actual well depth change from Base Bid and recorded in Project record Documents.

Determination of Unit Measurement: [Identified by site measurements and verified by the [Architect/Engineer] [________________].

Basis of Payment: Includes drilling, casing, backfilling, pump test and water quantity tests.

Grouting:

Basis of Measurement: By the cubic foot (meter).

Basis of Payment: Includes materials and placement of grout.

Pump:

Basis of Measurement: By the unit.

Basis of Payment: Includes pump controller, fittings, sensor and accessories; conduit, wire, pipe and pipe fittings from well to building service line; accessories and pump.

REFERENCES

ANSI/ASME Sec. 8D - Pressure Vessels.

ANSI/AWWA A100 - Water Wells.

ANSI/AWWA C900 - Standard for Polyvinyl Chloride (PVC) Pressure Pipe, 4 inch through 12 inch, for Water.

ASTM A53 - Pipe, Steel, Black and Hot-Dipped, Zinc Coated Welded and Seamless.

ASTM A120 - Pipe, Steel, Black and Hot-Dipped, Zinc Coated (Galvanized) Welded and Seamless, for Ordinary Uses.

NEMA MG 1 - Motors and Generators.

SYSTEM DESCRIPTION

Water well with the following characteristics:

Upper Drill Hole:	[____] inch ([____] mm) diameter, [____] feet ([____] m) deep.

Lower Drill Hole:	[____] inch ([____] mm) diameter, [____] feet ([____] m) deep.

Casing Size:	[____] inch ([____] mm) outside diameter, [____] feet ([____] m) deep.

Grout Seal:	[____] feet ([____] m) deep.

Total Well Depth:	[____] feet ([____] m) deep.

Pump Depth:	[____] feet ([____] m) deep.

PERFORMANCE REQUIREMENTS

Water well capable of producing a minimum of [____] gallons ([____] l) of water per minute.

Maximum Sand Suspended in Delivered Water: [____] ppm.

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Product Data: Provide manufacturer's literature and data indicating rated capacities, weights, accessories, electrical nameplate data, and wiring diagrams.

Manufacturer's Installation Instructions: Indicate rigging, assembly, and installation instructions.

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700.] [________.]

Accurately record actual locations of well, depth, subsoil strata and drilling difficulties encountered.

Submit signed copy of driller's log book statements.

QUALITY ASSURANCE

Perform Work in accordance with ANSI/AWWA A100.

****** [OR] ******

Perform Work in accordance with [utility company.] [municipality.] [________.]

QUALIFICATIONS

Drilling Firm: Company specializing in performing the work of this Section with minimum [__________] years [documented] experience.

[Submit proof of [state] [________] license to perform this work.]

REGULATORY REQUIREMENTS

Conform to [[applicable] [___________] code] [state regulatory authority] or regulations for water well flow capabilities [and water quality].

Provide certificate of compliance from [authority having jurisdiction] [________________] indicating suitability of water for human consumption.

SEQUENCING

Sequence work under the provisions of Section [01010.] [________.]

Sequence Work to occur before placement of water service piping to building.

PART	PRODUCTS

MATERIALS

Well Casing (Steel): [ASTM A53] [ASTM A120] [________], [3 inch (75 mm)] [4 inch (100 mm)] [5 inch (125 mm)] [6 inch (150 mm)] internal diameter schedule [40] [80] galvanized pipe, with pitless adaptor and ventilated well cap.

****** [OR] ******

Well Casing (PVC): ANSI/AWWA C900 PVC, [3 inch (75 mm)] [4 inch (100 mm)] [5 inch (125 mm)] [6 inch (150 mm)] internal diameter pipe, with ventilated well cap.

Grout: Portland cement type, no admixtures.

PUMP

Manufacturers:

[_________________________________] Model [________].

[_________________________________] Model [________].

[_________________________________] Model [________].

Type: Vertical shaft, multiple stage, close coupled, for insertion in [3 inch (75 mm)] [4 inch (100 mm)] [6 inch (150 mm)] diameter pipe.

Casing: [Cast iron] [Bronze] casting with stainless steel housing and intake screen, check valve with stainless steel stem and valve seat with rubber seal built into discharge casting.

Impellers and Diffusers: [Bronze] [Glass reinforced thermoplastic with stainless steel wear rings] [_________________].

Shaft: Stainless steel with stainless steel shaft sleeve.

Motor: NEMA MG 1, submersible type:

Characteristics: [____] hp ([____] w); [[115] [230] volt, single phase 60 Hertz] [[200] [230] [460] [575] volt, three phase 60 Hertz].

Pump: Submersible type for deep well pump, [water lubricated] [oil filled]:

Operating Performance: [_____] gal/min ([_______] L/sec) flow capacity, [_____] feet ([______] kPa) total dynamic head, [_____] hp motor.

Pump Capacity (Base Bid Criteria): [[____] gpm ([____] l/s)] [[____] gph ([____] l/hr)]

Pump Controller: NEMA 250 Type [1] [3R] [____] enclosure with main disconnect interlocked with door, containing across-the-line electric motor starter with starting relay [and ambient compensate quick trip overloads in each phase with manual trip button and reset button]; circuit breaker, control transformer, hand-off-automatic selector switches, pilot light.

Disconnect: NEMA 250 Type [1] [3R] [____] enclosure.

Pressure Sensing Switch: Low voltage relay type, [fixed] [adjustable] settings to start at [20] [30] [___] psig ([140] [205] [____] kPa) and shut-off at [40] [50] [___] psig ([275] [345] [____] kPa) [and low pressure cutoff set at [20] [____] psig ([145] [____] kPa)]].

Control Voltage: [120 VAC.] [24 VDC.] [________.]

Pump Lift Cable: Stainless steel, multi-stranded aircraft cable, high tensile strength; cable ends fitted with closed loop fittings; length of cable equals depth of shaft plus [20] [____] feet ([6] [______] m).

Screens: [Stainless steel] [________] type.

TANK

Manufacturers:

[_________________________________] Model [________].

[_________________________________] Model [________].

[_________________________________] Model [________].

Tank: Galvanized steel, tested and stamped in accordance with ANSI/ASME Section 8D; pressurized [diaphragm] [________] type [for pipe mount] [with integral floor stand]; tapping for installation of piping and accessories:

Tank Volume: [_____] gallons ([_____] liters).

PART	EXECUTION

EXAMINATION

Verify site conditions under provisions of Section [01039.] [________.]

Verify that site conditions will support equipment for performing drilling operations [and testing].

PREPARATION

Protect structures near the well from damage.

DRILLING

Drill concentric well shaft to diameters and depths [indicated.] [required.]

Place well casing immediately after drilling. Set firmly in place.

Clean shaft bottom of loose material.

Allow inspection of casing prior to placement of grout.

Place grout tight to surrounding work in accordance with [regulatory requirements.] [________.]

Maintain well opening and casing free of contaminating materials.

Cut off shaft top [24] [____] inches ([600] [____] mm) above [grade] [________]. Do not permit metal cuttings to enter casing.

Disinfect well.

INSTALLATION - PUMP

Install pump and accessories in accordance with manufacturer's instructions.

Electrical Connections: Refer to Section [16180.] [________.]

TOLERANCES

Maximum Variation From Plumb: [In accordance with ANSI/AWWA A100] [[1/2] [____] inch ([12] [____] mm)] [not to exceed 2/3 of casing diameter per 100 feet (30 m) of well depth].

Maximum Offset From True Position: [1] [____] inch ([25] [____] mm).

PERFORMANCE TESTING

Notify [Architect/Engineer] [authority having jurisdiction] [________], [3] [____] days prior to flow rate testing.

Flow rate test and certify. Submit executed certification to [Architect/Engineer] [________].

Water Quality: [________].

Sand Content: [________].

CLEANING

Clean work under provisions of [01700.] [________.]

Clean piping in preparation for disinfection and testing.

END OF SECTION