A-6.1 Specification.pdf

SECTION 01 51 01

MOBILIZATION

1.01 SUMMARY

A. This work consists of moving personnel, equipment, material, and incidentals to the project and performing all work necessary before beginning work at the project site. Mobilization includes the obtaining of permits, insurance, and bonds.

1.02 MEASUREMENT

A. Mobilization will be measured by lump sum. Item 01505 (01) Mobilization.

1.03 PAYMENT

A. The accepted quantity, measured as provided above, will be paid at the contract price per unit of measurement for the pay item listed below that is shown in the schedule of item. Payment will be full compensation for the work prescribed in this Section.

The mobilization lump sum quantity (LSQ) will be paid for the job as follows:

a) Bond premium will be reimbursed after receipt of the evidence of payment.

b) 50% of the lump sum, not to exceed 5% of the original contract amount, will be paid following completion of 5% of the original contract amount not including mobilization and bond premiums.

c) Payment of the remaining portion of the lump sum, up to 10% of the original contract amount, will be paid following completion of 10% of the original contract amount not including mobilization and bond premiums.

d) Any portion of the lump sum in excess of 10% of the original contract amount will be paid after final acceptance.

END OF SECTION

SECTION 01 54 50

WATER TANK & APPURTENANCES

PART 1 ‐ GENERAL

The work of this section shall consist of furnishing and installing and/or repairing each mentioned water tank and its corresponding plumbing connections and appurtenances including but not limited to inlets, overflows, vents, drains, bypasses, valves, valve boxes and testing spigots.

Connection to water supply and water distribution system is included. Where applicable, this also include all materials and labor for the installation of a concrete base pad.

1.02 DEFINITIONS

A. GSP: Galvanized Steel Pipe.

B. P.E.: Polyethylene C. COR: Contracting Officer’s Representative.

1.03 SUBMITTALS

A. Manufacturer’s data for the water tank.

1.04 QUALITY ASSURANCE

A. All work is to be completed according to applicable Federal, State and Local codes. This work includes, but is not limited to, materials, installation, testing and disinfection

B. NSF Compliance: Comply with NSF 14 for plastic potable water service piping. Include marking “NSF‐pw” on the tank.

1.05 MINIMUM REQUIREMENTS

A. Tank shall have a minimum capacity of 1000 gallons or current tank capacity shall be maintained, whichever is greater.

PART 2 ‐ PRODUCTS

2.01 WATER TANK

A. Water tank shall be manufactured by ProTank, American Tank, Norwesco, or other approved manufacturer to meet these specifications.

B. Tank shall be a flat bottom, vertical design C. Minimum capacity shall be 1000 gallons. Tank shall be constructed of black or dark green polyethylene to prevent sunlight penetration.

D. Tank shall comply with NSF 14 for plastic potable water service piping. Include marking

“NSF‐pw” on the tank.

E. Tank shall have 3 separate, reinforced bungs, one at floor level (outlet), one at the level of full capacity (overflow) and one at 6 inches above overflow (inlet).

F. Tank shall be self‐venting with screened, weather‐proof openings.

G. Tank shall have lockable lid.

PART 3 ‐ EXECUTION

3.01 TANK INSTALLATION

Note: Only E is necessary where tank is being replaced rather than newly installed.

A. For systems where no tank was previously installed, contractor shall determine and stake proposed tank location two weeks prior to any installation. Location shall be approved by Forest Service representative.

B. Prepare a level pad for tank placement where necessary. Excavated material shall be used to fill low areas of the pad.

C. Remove all exposed rocks from the bottom of the pad. Compact the fill material with several passes of the excavation equipment. Bed the surface of the pad with a 3‐inch layer of ¾” minus road base.

D. Place a berm of ¾” minus road base around the perimeter of the tank, as shown on the drawings.

E. Prepare 4 tiedowns by driving 4 steel T‐bar fence posts to 3‐foot depth. Locate posts to align with hold down locations provided on the tank.

F. Install the tank on the pad. Use 3/16” steel cable and steel turnbuckles to secure to hold down locations provided on the tank

G. Construct lean‐to over tank if specified in Statement of Work. Design and materials of lean‐to shall be at discretion of contractor. Lean‐to shall be structurally sound and able to resist winter conditions including weight of snow. It must prevent snow from accumulating on top of tank and must divert snow such that it does not push against sides of tank. Lean‐to must not interfere with the functionality of or access to the water system. Design shall be approved by Forest Service representative before construction.

3.02 WATER LINE INSTALLATION

A. All pipe installed from the well head to the tank shall conform to Section 015460.

B. Connect water line to the tank according to all manufacturer’s recommendations.

3.03 PLUMBING AND APPURTENANCES

A. Overflow pipe, vent, drain and all other appurtenances shall be installed according to provided plans.

B. All tanks and appurtenances shall follow applicable state and national standards.

C. All tanks shall use the same basic plumbing design as shown in drawings. Slight variations to allow for difference in source type, source flow rate, expected usage, etc.

may be necessary, however basic design and placement of appurtenances shall remain the same across all systems.

D. All tanks shall use the same basic plumbing design as shown in drawings. Slight variations to allow for difference in source type, source flow rate, expected usage, etc.

may be necessary, however basic design and placement of appurtenances shall remain the same across all systems.

E. All tanks shall have a vent placed within the top 6 inches of the tank and a minimum distance of 6 inches above the maximum fill level. Vent shall have a minimum 12‐inch air gap and shall use in an inverted U design. Vent shall be properly covered in mesh to prevent entry of animals or debris.

F. All tanks must have an overflow line. Line must be placed to allow maximum filling capacity while maintaining a minimum of 6 inches between the vent and maximum fill line. Overflow shall connect to drain as per attached drawings or to water trough as per current system design. Water overflow line must be sized to facilitate source flow rate at all times and prevent tank from overfilling.

G. All tanks must include a drain and drain valve allowing tank to be emptied without opening distribution system. Drain shall be constructed according to the provided plans.

Drain valves shall be located inside valve boxes.

H. All tanks must include a bypass including proper valve installations in valve boxes.

Bypass shall allow water to pass directly from the water supply to the drain and ensure the ability to stop flow into the tank.

I. All tanks must include a shutoff valve to the distribution system as per the provided drawings. Valve must be installed in a valve box.

J. All tanks must have a testing spigot according to attached drawings. Spigot shall have a minimum 4‐inch air gap.

K. Additional appurtenances such as vacuum breakers not in plans shall be left on tanks and remain functional unless otherwise specified.

L. Upon completion of work, fill water storage tanks to water operating level to ensure structural integrity and freedom from leaks. Hold water level for two hours with no drop in water level.

M. Upon completion of work, contractor shall complete system disinfection using chorine.

Concentration must be a minimum of 10 mg/l in the tank and distribution system. Allow 24 hours set time, dechlorinate, flush, sample and test for presence of total Coliform and E. Coli. Repeat as necessary until results indicate the absence of bacteria.

a. Sampling and testing shall be in accordance with California Code of Regulations, Title 22 Social Security, Division 4 Environmental Health. Water sampling and testing laboratory shall be certified by the State of California for public water systems.

SECTION 01 54 60

WATER DISTRIBUTION SYSTEMS

PART 1 – GENERAL

1.01 SUMMARY

A. The work of this section shall consist of furnishing and installing and/or repairing of potable water distribution pipe and fittings, drains and faucets.

B. Section includes any necessary trenching, fittings, identification tape, bedding material, backfill, GSP risers, vacuum breakers, faucets, 4”x4” treated timber post and brackets, drain rock, transitions, reducers, valve boxes, valve stem outlets, etc.

C. Removal and disposal of any materials no longer needed off National Forest lands is included.

D. This section shall also include the flushing, testing and disinfection of waterlines.

Note: Contractor may choose to reuse materials of sections of current systems, however, all construction must meet pressure test and other requirements. Contractor will be held responsible for properly functioning system regardless of their choice to replace all sections or not.

1.02 DEFINITIONS

A. GSP: Galvanized Steel Pipe.

B. P.E.: Polyethylene

C. COR: Contracting Officer’s Representative.

1.03 SUBMITTALS

A. Product Data: For the following:

a. Pipe and fittings.

b. Drain and vent screens.

c. Faucets.

d. Valves.

1.04 QUALITY ASSURANCE

A. All work is to be completed according to applicable Federal, State and Local codes. This

B. Piping materials shall bear label, stamp, or other markings of specified testing agency.

C. NSF Compliance:

a. Comply with NSF 14 for plastic potable‐water‐service piping. Include marking "NSF‐pw" on piping.

b. Comply with NSF 61 for materials for water‐service piping and specialties for domestic water.

1.05 MINIMUM SYSTEM REQUIREMENTS

A. Unless otherwise noted, the minimum working pressure for piping and specialties shall be 160 psig.

1.06 DELIVERY, STORAGE AND HANDLING

A. Deliver piping with factory‐applied end caps. Maintain end caps through shipping, storage, and handling to prevent pipe‐end damage and to prevent entrance of dirt, debris, and moisture.

B. Protect stored piping from moisture and dirt. Elevate above grade.

C. Protect flanges, fittings, and specialties from moisture and dirt.

D. Store plastic piping protected from direct sunlight. Support to prevent sagging and bending.

2.01 GENERAL

A. All waterlines, pipes, and fittings shall be new and unused, of the type, pressure rating or class, and size necessary for proper system functioning.

2.02 PIPES AND FITTINGS

A. Polyethylene (PE):

a. Minimum Pressure Rating: 160 psig

b. Fittings: Plastic mechanical type as manufactured by Central Plastics or equal;

barb and hose clamp systems will not be allowed.

B. Galvanized Steel Pipe (GSP): ASTM A53, Schedule 40, threaded ends meeting ASME

B1.20.1.

a. Fittings: Threaded, ASTM A 338.

C. Valves.

a. Gate valves of California approved brass, manufactured by Hammond or approved equal.

b. Valve box – concrete, approved by Forest Service Representative

c. Valve stem riser of 6” PVC schedule 40.

D. Drains.

a. Suction Strainer

i. Design: Galvanized (zinc plated), cold rolled, 16‐gage steel strainer with threaded end to fit GSP drain pipe size.

ii. Model: “SSS” Series, Round Hole Strainer, as manufactured by Campbell Manufacturing Inc., or an approved equal.

b. Riprap

i. The stones be obtained from on‐site excavated material or a borrow source designated by the Contracting Officer. Stones used shall be such that not more than 10 percent of the individual stones shall have a perimeter less than 12 inches in the smallest section. All stones shall have a volume less than a 1/2 cubic foot.

ii. The stones shall be sound, hard, durable and free from laminations, fractures, or other structural defects. They shall be of such quality that they will not disintegrate on exposure to water or weathering.

2.03 FAUCETS

A. Durable frost‐free faucet, lockable, approved by Forest Service representative B. Vacuum breaker shall be Watts Regulator 288A or approved equal.

C. Risers shall be made of ¾” GSP schedule 80.

D. Posts shall be made of treated 4”x4” lumber.

2.04 BACKFILL

A. Bedding material shall be clean sand 95% passing ¼” sieve. Native material may be used after passing a ¾” mechanical sieve on site.

B. General backfill shall be native material, free of roots and other organic material.

PART 3 ‐ EXECUTION

3.01 PIPING INSTALLATION

A. Construct the water system to the lines and grades shown or established in the field.

B. Any new waterline location shall be staked two weeks prior to construction and shall be approved by Forest Service representative before any excavation begins.

C. All water line shall be graded to drain. Remove existing water faucet risers to the first elbow below grade.

D. Bed with 6‐inch layer of sand or screened native material. See 3.2 below.

E. All pipe, fittings, and appurtenances shall be handled and installed in strict conformance to the manufacturer’s recommendations.

F. Drains, valves, and other regulating and controlling devices shall be installed in the line where called for on the drawings.

G. The interior of all pipe, fittings, and other accessories shall be kept as free as possible from dirt and foreign matter at all times. Each piece of line as it is laid shall be cleaned of all debris. When the pipeline has become dirty on the inside during shipment or storage, it shall be swabbed out by drawing a damp swab through the line before placing in trench. Care shall be exercised to keep all joining surfaces clean. Any pipe with contaminated or damaged joining surfaces, which cannot be satisfactorily cleaned or repaired, shall be discarded. Under no circumstances shall pipe be installed in water, and no pipe shall be installed when trench conditions or the weather is unsuitable for such work. At all times when work is not in progress, all open ends of the pipe and fittings shall be securely closed to the satisfaction of the Contracting Officer so that no trench water, rodents, earth, or other substance will enter the pipe or fittings.

H. Laying Pipe

a. No pipe shall be placed in the trench until the COR has approved the trench and bedding.

b. Pipes shall be placed true to the lines and grades shown on the Drawings and as specified. Complete water system shall be constructed to drain by gravity to drains for seasonal shutdown. Waterlines shall be constructed to drain at a minimum grade of 1%. Water lines not meeting this requirement shall be removed by the Contactor and replaced at no cost to the Government.

c. Each section of the pipe shall rest upon the pipe bed for the full length of its barrel.

d. Within 24 hours after installation, bed the pipe with sand or screened native material to 3 inches over the top of the pipe for the full width of the trench.

Backfill the pipe, leaving the joints and one foot of pipe on each side of each joint exposed until testing is complete.

e. When work is not in progress, securely close open ends of pipe and fittings.

f. Thermal fused joints shall be initially cut smooth and square. Follow all manufacturer’s recommendations for cutting, heating, fusing and cooling of all joints. Provide adequate clearance around joints for fusing equipment while maintaining true alignment of pipe.

g. Use proper fittings in order to follow the required line and grades and to avoid excessive curvature. Deflections from a straight line or grade, as required by vertical curves, horizontal curves, or offsets, shall not exceed the manufacturer's recommended maximum joint deflection or curvature for their pipe.

h. Bends that result in joint tension or permanent pipe deformation are prohibited.

i. Pipelines may be relocated slightly, if necessary, to avoid existing obstacles.

However, the required slopes must be maintained.

I. Branch Connections

a. Branch connections to the main shall be made with tees.

b. Horizontal tees for waterline laterals shall not be permitted. The branch side of tees shall be up when drainage is toward the tee, and down when drainage is away from the tee.

J. Pipe Joints

a. Joints shall be made, using jointing materials and applied with the proper accessories, in accordance with the manufacturer's instructions. Completed joints shall be watertight, and capable of passing the required hydrostatic testing. If pipe and fittings are assembled with a lubricant, it must be nontoxic.

b. Dissimilar Joints: Connections between two dissimilar pipes or fittings shall be installed in manner recommended by the pipe manufacturer and approved by the Contracting Officer. Use adapters compatible with both piping materials, outer diameters and system working pressure.

c. Threaded Metal Joints:

i. Thread pipes with tapered pipe threads according to ASME B1.20.1, apply tape or joint compound, and apply wrench to fitting and valve ends into which pipes are being threaded.

ii. Exposed threaded pipe joints on galvanized steel pipe shall be painted with mastic following the manufacturer’s application procedures.

iii. Field cut ends shall be squared off by grinding or filing; ends shall be reamed with all chips and flakes removed.

iv. Field cut threads or machined joints shall be made with sharp tools to sharp finished ends.

3.02 FINAL BACKFILL AND GRADING

A. See 3.1.H.4 above for bedding of pipe and initial backfill.

B. Use detectable warning tape over piping and at outside edges of underground structures at a depth from 6 to 12 inches C. Native material shall be placed in the trench and tamped with the trenching equipment. The trench line shall be crowned up to 6 inches. Excess material shall be uniformly sloped from the top of the crown. All disturbed ground shall be raked smooth and organic debris removed from the trench line.

D. Gravel road and camping spur crossings shall be backfilled with care for compaction.

Lifts shall not exceed 6 inches and shall be tamped with equipment or hand operated vibratory equipment. Gravel segregated at initial trenching shall be placed as the top lift and crowned up to 3 inches.

3.03 DRAINS

A. Transition from water system piping to galvanized steel pipe 10‐feet from atmospheric outlet of daylight drain.

B. Install suction strainer on the atmospheric outlet of daylight drains.

C. Minimum grade of slope of drain shall be 2%.

D. Place riprap securely around outlet with a minimum 12” air gap.

3.04 HYDROSTATIC TESTING

A. General

a. The Contractor shall conduct pressure and leakage tests on all newly constructed portions of the water system, including water mains, service lines, fittings, valves, and hydrants. New waterlines that are extensions or modifications of an existing water system shall be tested at the test pressure specified here unless the Contracting Officer specifies another pressure. Pneumatic testing will not be allowed.

b. The contractor shall ensure that any appurtenance attached to the pipeline at the time of testing is rated to withstand the pressures that will exist during testing.

c. Conduct piping tests before joints are covered and after thrust blocks, if required, have hardened sufficiently. Joints shall remain uncovered until testing is completed satisfactorily.

d. The Contractor shall furnish the pump, pipe, gauge, measuring device, connections, and all other necessary equipment, and shall furnish the necessary personnel to conduct the tests. All equipment, gauges, and attachments shall be subject to approval by the Contracting Officer.

e. The Contracting Officer shall be present during the testing period.

f. Waterlines shall be tested in sections not to exceed 2,000 ft in length or a maximum pressure differential of 30 psi in the test section.

g. No paints, asphalts, tars, enamels, or other types of pipe compounds shall be used to eliminate leaks.

B. Pressure and Leakage Test

a. The test pressure shall:

i. Equal at least 100 psig at the highest elevation of the test but not exceed 125 psi at any point being tested.

ii. Not exceed the thrust restraint design pressures.

iii. Not vary by more than +/‐ 5 psi from the established test pressure.

iv. Not exceed twice the rated pressure of valves when the test section includes closed valves.

b. Pressure Test Procedure

i. Equipment: The test pressure shall be applied by means of a pump connected to the pipe in a manner satisfactory to the Contracting Officer.

ii. Preparation: Fill pipeline 24 hours before testing. Use only potable water. Each valved section of pipeline shall be slowly filled with water and all air shall be expelled from the pipeline.

Apply test pressure to stabilize system.

iii. Pressurization:

1. Increase pressure in 50‐psig increments and inspect each joint between increments.

2. Hold at test pressure for 1 hour.

3. Decrease to 0 psig.

4. Slowly increase again to test pressure and hold for 1 more hour. If the test pressure cannot be sustained within +/‐ 5 psi during this time, then the system will be determined to have leakage.

5. Leakage shall be verified by the Contractor and the Contracting Officer.

6. Locate and repair leaking joints with new materials and repeat test until leakage is within allowed limits. All visible leaks are to be repaired regardless of the amount of leakage.

iv. Examination: All exposed pipe, fittings, valves, and joints shall be carefully examined. Any cracked or defective pipe, fitting, or valve discovered shall be repaired or replaced by the Contractor at his own expense with new material and the test repeated until satisfactory to the Contracting Officer.

c. Results

i. The Contractor shall furnish a written report to the Contracting

Officer describing the results of each test. The report must identify the specific portions of the pipeline tested, the pressure, the duration of the tests, and the amount of leakage.

3.05 CLEANING AND DISINFECTION

A. Clean and disinfect water‐distribution piping as follows:

a. Purge new water‐distribution piping systems and parts of existing systems that have been altered, extended, or repaired before use.

b. Use purging and disinfecting procedure prescribed by authorities having jurisdiction or, if method is not prescribed by authorities having jurisdiction, use procedure described in AWWA C651 or as described below:

i. Flushing Pipelines

1. After the pressure and leakage testing has been completed, all water pipes shall be thoroughly flushed.

2. Flushing shall remove all debris from the pipeline, including HDPE pipe shavings, gravel and any other material that may have accidentally entered the pipeline during construction.

3. Remove all self‐closing faucets and drinking fountains from hydrants before flushing lines. Failure to do so will likely clog the internal parts of the faucet.

4. If no hydrants or other outlets are installed at the end of the waterline, an outlet at the end of each lateral shall be provided.

Outlets shall be large enough to develop a velocity in the waterlines of at least 2.5 feet per second (see Table l for necessary flows). If necessary, use a booster pump or other method to obtain the necessary flows.

5. Minimum velocities must be obtained in all mainlines, laterals and drain lines.

6. Ensure flushing outlets have adequate drainage and no damage or erosion will occur from the flushing process. Install hoses and/or pipe extensions if necessary.

TABLE 1

Required Flow in Gallons per Minute (GPM) to provide 2.5 feet per second

Flushing Velocity

Type of Pipe

Nominal Pipe Size (inches)

HDPE

(SDR 11)

PVC

(160 psi)

Galv. Steel (Schedule 40)

1 7 9 7

1 ¼ 11 15 12

1 ½ 14 19 16

2 22 30 27

2 ½ ‐ 44 38

3 49 64 58

3 ½ ‐ 84 77

4 81 106 100

5 ‐ 162 156

6 175 229 225

8 274 388 390

10 461 603 615

12 648 848 872

c. Requirement of Chlorination

i. Pipelines: After flushing, all new waterlines and repaired portions of, or extensions to, existing waterlines shall be disinfected by chlorination.

Chlorination shall provide a minimum of 25 mg/l residual after 24 hours contact in the system. This may be expected with an application of 50 mg/l, although some conditions may require more. The entire system including the storage tank or spring box shall be filled with the disinfecting solution.

All taps, hydrants, and other outlets shall be opened and left open until chlorine is noticeable by odor or testing in the water coming from each.

Immediately close taps, hydrants, and other outlets. The chlorinated water shall be retained in the waterlines for at least 24 hours. An alternative of introducing a chlorine solution of 300 mg/l for a period of 3 hours is also approved.

ii. Reservoirs Only: For large reservoirs where water is not going to be reused to disinfect connecting distribution lines, or where it is not economical to treat the entire contents with 50 mg/l of chlorine, disinfection can be accomplished by swabbing or spraying the walls, floor, and ceiling with a chlorine solution containing 300 mg/l of available chlorine. A minimum of 3 hours shall elapse before the structure is flushed and returned to service.

iii. Preparation of Disinfecting Mixture: Chlorine‐bearing compounds used for disinfection shall comply with ANSI/NSF 60.

iv. Calcium hypochlorite must be prepared as a water mixture for introduction into the waterlines. The powder should first be made into a paste and then thinned to either a 1 percent or 5.25 percent chlorine solution.

v. Sodium hypochlorite is already a water mixture.

vi. Table 2 gives the amount of chlorine‐bearing compound to mix to obtain either a 1 percent or 5.25 percent solution.

vii. Table 3 gives the amount of a 1 percent or 5.25 percent solution required to obtain a 50 mg/l solution for various volumes.

viii. Table 4 gives the volume of water contained in each 100 feet of pipe of various sizes.

TABLE 2

Amount of Chlorine‐bearing Compound to Mix to Obtain a 1% or 5.25% Solution

Product 1% Solution 5.25% Solution

Amount of Compound

Gallons of Water

Amount of Compound

Gallons of Water

Calcium Hypochlorite (65% Cl)

1 pound 7.67 1 pound 1.36

Sodium Hypochlorite (5.25% Cl)

1 gallon 4.25 1 gallon 0

TABLE 3

Amount of Chlorine‐Water Solution Required to make 50 mg/l Chlorine Solution for Various Volumes

Volume (Gallons)

5.25% Solution

1.00% Solution

100 1.52 cup 0.50 gal.

500 0.48 gal. 2.50 gal.

1,000 0.95 gal. 5.00 gal.

5,000 4.76 gal. 25.0 gal.

10,000 9.52 gal. 50.0 gal.

50,000 47.6 gal. 250 gal.

100,000 95.2 gal. 500 gal.

TABLE 4

Volume in Gallons per 100 feet of Pipe

Type of Pipe

Nominal Pipe Size (inches)

HDPE

(SDR 11)

PVC

(160 psi)

Galv. Steel (Schedule 40)

1 4.6 5.8 4.5

1 1/4 7.3 9.6 7.8

1 1/2 9.6 12.6 10.6

2 15.0 19.6 17.4

2 1/2 ‐ 28.8 24.9

3 32.6 42.6 38.4

3 1/2 ‐ 55.6 51.4

4 53.8 70.4 66.1

5 ‐ 107.5 103.9

6 116.7 152.6 150.1

8 182.8 258.6 259.9

10 307.2 401.8 409.6

12 432.2 565.2 581.4

d. Method of Chlorine Application: The preferred method is to fill the storage tank

(for a distribution system) or the spring head box (for a supply system) with chlorinated water of the proper strength. The water shall then be released through the outlet lines to the remainder of the system and retained there for the required period of time. If either of these points of application is unavailable, chlorinated water of the proper strength may be added to the beginning of the pipeline extension, or to any valved section of the extension, through a corporation stop installed by the Contractor in the top of the pipe.

Other methods may be approved by the Contracting Officer.

e. Testing of Chlorine Residual: To ascertain the concentration, the chlorine residual shall be measured by the Contracting Officer in accordance with the procedures described in the current edition of “Standard Methods for the Examination of Water and Wastewater,” or AWWA M12, or by using an appropriate high‐range chlorine test kit

f. Final Flushing and Testing: Following the retention period, as specified in this Section, all heavily chlorinated water shall be thoroughly flushed from the pipeline until the chlorine concentration in the water leaving any part of the line is no higher than 1 mg/1.

g. Disposal:

i. Heavily chlorinated water shall not be drained directly into streams, rivers, lakes or drainage ditches which lead to surface water.

ii. When emptying the lines or tank after the 24‐hour period, whether the system has passed or failed, the chlorine solution shall be neutralized before being discharged. Neutralize system by adding sodium thiosulfate to the storage tank in accordance with Table 5 below. Let the sodium thiosulfate sit in the storage tank for 24‐hours and then release the water from the tank and flush the system. Residual chlorine at the outlets shall be minimal.

TABLE 5

Amounts of Chemical Required to Neutralize Various Residual Chlorine Concentrations in

1,000 gallons of Water

Residual Chlorine Concentration mg/L

Pounds of Sodium Thiosulfate (Na2 S2 O3 –5H2O)

1 0.012

2 0.024

10 0.12

50 0.60

h. Bacteriological Examination: After the system has been disinfected as specified, but before the new water piping is put to use or connected to existing piping, the Contractor shall test the water for bacteriological contamination from representative points in the system as approved by the Contracting Officer. The coliform organisms shall be tested for presence/absence in accordance with State drinking water regulations. If coliform bacteria are present, testing shall be repeated in accordance with State drinking water regulations. If the report of this examination is unsatisfactory, the system shall be flushed and the disinfection procedure repeated until the results of bacteriological examinations are satisfactory.

SECTION 01 54 70

SPRING BOX

A. This Section shall consist of removing, disposing of and replacing the spring boxes at the specified sites.

1.02 QUALITY ASSURANCE

A. All work is to be completed according to applicable Federal, State and Local codes. This work includes, but is not limited to, materials, installation, testing and disinfection

PART 2 ‐ PRODUCTS

2.01 ASSUMED PARAMETERS GOVERNING SELECTION OF PRODUCTS

A. Suggested design may be used, or contractor may propose an alternate design. All materials and methods must be in compliance with applicable drinking water codes.

3.01 SPRING BOX INSTALLATION

A. Spring box shall have an operable and lockable cover that is closed tightly against animals, rain, leakage and is secure against tampering.

B. Spring box shall have an overflow pipe exiting at a suitable height through on of the spring box walls and shall direct water away from the spring box and to a location where spillage will not cause erosion around the spring box walls and water will not be able to re‐enter the spring box.

C. Surface water runoff shall be diverted away from spring box with the installation of a diversion ditch or swale roughly 8 meters up‐slope form the spring.

SECTION 01 54 80

SOLAR PUMP SYSTEM

B. This Section shall consist of furnishing and installing the following:

a. Submersible solar pump

b. Photovoltaic panel array

c. System controller unit with float switch in storage tank

d. Pole mounting system

C. This Section shall also include the flushing, testing and disinfection of waterlines.

1.02 QUALITY ASSURANCE

B. All work is to be completed according to applicable Federal, State and Local codes. This

2.01 ASSUMED PARAMETERS GOVERNING SELECTION OF PRODUCTS

B. Size pump selection based on total elevation head of 100 feet and delivery pipe of 1‐ inch polyethylene up to 50 feet in length. Minimum output shall be 3 gallons per minute. Acceptable brands are Grundfoss, Dankoff, and Conergy.

C. Solar panel array selection shall be sized to operate the pump selected in 2.1.A.

Performance from the months of June through August shall be capable of 1,000 gallons per day, with reduced performance through October. Latitude is 41 degree north, and solar output may be based on data from Reno, NV.

D. System controller selection shall be based on the pump selected in 2.1.A. System electrical output to the pump shall remain D.C. current. Controls shall include float switch on/off operation and dry pump override/shut off protection. The float switch shall be capable of maintaining a 6‐inch range of water levels with on/off operation.

Housing shall be weatherproof.

E. Pole mounting system shall be specifically designed for and supplied by the solar panel array manufacturer. The pole shall be a minimum of 3” diameter galvanized schedule 40 steel pipe, and compatible with the manufacturer’s system.

F. Drop pipe for the pump shall be Schedule 120 PVC, diameter to be compatible with pump selected in 2.1.A, three lengths of 21 feet each.

3.01 PUMP INSTALLATION

A. Pump shall be set in well at a depth below static water level and drawdown, or using three full lengths of 21‐foot drop pipe, whichever is greater

3.02 SOLAR PANEL INSTALLATION

D. Pole mounting system shall be completed according to all manufacturer’s recommendations

E. Galvanized steel pipe (GSP) pole shall be set at 8 feet above grade and 5 feet below grade.

F. GSP pole shall be set in a bored hole 4 inches in diameter greater than the GSP pole.

The annular space around the pole shall be filled with concrete or grout to the full depth of 5 feet.

G. Location of GSP pole shall be within 15 feet of the well. Control wire to the storage tank and power cable to the well pump shall be buried in the trench with the water piping from the well to the storage tank.

3.03 CONTROLS INSTALLATION

A. Controller shall be securely mounted to the GSP pole at a height of 5 feet.

B. Cable to the pump shall be sized and installed according to all manufacturer’s recommendations. Bury cables in common trench with water piping. Cover cables with detectable warning tape in trench.

C. The float switch shall be installed such that it is bypassed to allow the pump to run continuously during hours of sunlight.