Attachment 2 - Combined Specifications.pdf

01010 - 1

SUMMARY OF WORK

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

1.1 SUMMARY

A. This project consists of the construction of a new non-potable stock water well, installation of approximately 1,600 lineal feet of two (2) inch HDPE plastic main waterline pipe and appurtances, installation of two (2) – 2 inch diameter PVC supply waterlines and appurtances, and the installation of five (5) used rubber tire casing stock water tanks with appurtances.

B. Other work includes the construction of guard posts.

C. All work associated with the new well construction shall comply with the Nebraska Department of Health and Human Services (DHHS) 178 NAC 10 and 12 regulations for this type of work. The non-potable well casing shall be five (5) inches in diameter and estimated to be 350 feet deep. The Contractor shall be responsible for design of the solar pump size to meet the 5 gallons per minute requirement. A Grunfos pump is preferred.

1.2 LOCATION

A. This project is located at Pine Ridge Ranger District on the Nebraska National Forests and Grasslands, and is located approximately 21 miles southwest of Chadron, NE.

The area is located in the W1/2 SW ¼ of Section 21, T31N, R50W, Dawes County, NE. The site can be reached by using FSR 767 off East Ash Road. The new well, new waterline and new used rubber tire casing stock tanks shall be located by the Government.

1.3 GOVERNMENT FURNISHED PROPERTY

A. General: Escape ramps are located at the Chadron Work Center, 3 miles south of Chadron, NE., and will be provided to the Contractor as needed.

1.4 GENERAL

A. Confine storage of materials to areas as approved by the Contracting Officer.

B. Preservation of Natural Features: Confine all operations to work limits of the project.

Prevent damage to natural surroundings. Contractor shall minimize disturbance of all undisturbed areas.

C. Restore damaged areas, caused by construction equipment, at no additional expense to the Government.

01010 - 2

SUMMARY OF WORK

D. Existing Utilities: The Government is responsible for calling the appropriate underground utility hotline before conducting ground disturbing activities.

1.5 MEALS AND LODGING

A. Meals or lodging are available in Chadron or Crawford Nebraska, both within 25 miles of the work site.

1.6 FIELD VERIFICATION

A. The Contractor shall field verify all new and existing dimensions affecting the work of this contract before ordering products.

B. There is a deep drainage south of the proposed new well site that the new waterline will cross. The Contractor shall provide the Forest Service a plan of action on how they plan to cross this drainage.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION (NOT USED)

END OF SECTION 01010

01025-1

DEFINITION OF BID ITEMS &

MEASUREMENT AND PAYMENT

SECTION 01025

DEFINITION OF BID ITEMS

AND

MEASUREMENT AND PAYMENT

PART 1 - GENERAL

3.1 SUMMARY

A. The intent of this section is to explain, in general; what is and what is not included in a bid item; the limits or cut-off points where one bid item ends and another begins; and method of measurements and basis of payment for work items listed in the Bid Item Schedule.

B. Work:

1. Furnishing all labor, materials, and equipment necessary to successfully complete the project or any portion of it and carrying out all duties and obligations imposed by the contract on the Contractor.

C. Payment:

1. For each individual item listed here and in the Schedule of Items, payment shall be full compensation for all work related to the item in accordance with these specifications, as shown on the drawings, and as staked in the field.

2. Measurement and payment for contract work shall be made only for and under those pay items included in the Schedule of Items. All other work and materials shall be considered incidental or as included in the payment for items shown.

3.2 DETERMINATION OF QUANTITIES

A. Quantity Measurements:

1. The Contractor shall verify the measurements of the new construction and notify the Government of any variations.

B. The following measurements and calculations are used to determine contract quantities.

1. For items that are measured by the linear foot, such as pipeline, measurements shall be made parallel to the base or foundation upon which the structures are placed.

2. For standard manufactured items- such identifications shall be considered the nominal weights or dimensions. Unless controlled by tolerances in cited specifications, manufacturer's tolerances shall be accepted.

3.3 UNITS OF MEASUREMENT

A. Payment shall be by units defined and determined according to U.S. Standard measure and by the following:

01025-2

MEASUREMENT AND PAYMENT

1. Each: One complete unit, which may consist of one or more parts.

2. Linear Foot: Linear feet measured horizontally.

3. Lump Sum: Do not measure directly. The bid amount is complete payment for all work described in the contract and necessary to complete the work for that item.

3.4 DEFINITION OF BID ITEMS

A. Definition of Bid Item No. 1: East Ash Well Drilling

1. Description: New Well Drilling (Labor & Equipment). This work consists of the labor and equipment associated with drilling a new well and install required appurtenances.

a. Measurement and payment: Actual Quantity (AQ), Lineal Foot (LF).

2. Description: New Well Drilling (Materials). This bid item consists of the materials needed to drill a new well and install required appurtenances.

a. Measurement and Payment: Lump Sum Quantity (LSQ), Lump Sum (LS).

B. Definition Bid Item No. 2: East Ash Solar Pump

1. Description: New Solar Pump Installation (Labor). This work consists of the labor and associated with installing a solar pump on a new well.

a. Measurement and payment: Actual Quantity (AQ), Each (EA).

2. Description: New Solar Pump Installation (Materials). This bid item consists of the materials needed to install a new solar pump.

a. Measurement and Payment: Actual Quantity (AQ), Each (EA).

C. Definition of Bid Item No. 3: East Ash Pipeline

1. Description: Trenching & Pipeline Installation (Labor & Equipment). This work consists of the labor and equipment associated with trenching and installing new HDPE pipeline and appurtenances.

a. Measurement and payment: Actual Quantity (AQ), Lineal Foot (LF).

2. Description: Trenching & Pipeline Installation (Materials). This work consists of the materials associated with trenching and installing a new HDPE pipeline and appurtenances.

a. Measurement and Payment: Lump Sum Quantity (LSQ), Lump Sum (LS).

D. Definition of Bid Item No. 4: East Ash Tire Tanks

1. Description: Tire Tank Installation (Labor & Equipment). This work consists of the labor and equipment associated with installing 5 new tire tanks and appurtenances.

a. Measurement and payment: Actual Quantity (AQ), Each (EA).

2. Description: Tire Tank Installation (Materials). This work consists of the materials associated with installing 5 new tire tanks and appurtenances.

a. Measurement and Payment: Lump Sum Quantity (LSQ), Lump Sum (LS).

PART 2 - METHOD OF MEASUREMENT

4.1 GENERAL

01025-3

MEASUREMENT AND PAYMENT

A. One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item:

1. MATERIALS: ACTUAL QUANTITIES (AQ)

a. These quantities are determined from actual quantities of material for completed work.

2. LABOR: LINEAL FOOT (LF)

a. These lengths are determined from actual measurements of completed work.

3. LUMP SUM QUANTITY (LS)

a. These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job.

END OF SECTION 01025

SECTION 01550

GOVERNMENT FURNISHED MATERIALS (GFM)

PART 1 - GENERAL

1.1 1.1 SUMMARY

A. This applies to materials that shall be provided by the Government and installed by the Contractor.

1.2 INSPECTION

A. The Contractor shall notify the Contracting Officer (CO) at least 5 calendar days prior to picking up or returning Government-furnished materials.

1. The Contractor and the CO shall jointly inspect all materials during the

Contractor loading operation at the Chadron Work Center, 3 miles south of Chadron, NE.

1.3 LIABILITY

A. The Contractor's liability for Government-furnished material shall start at the time he accepts the materials at the storage area and shall terminate upon completion and final acceptance of the work.

1. It shall be implied that the Contractor has accepted Government-furnished material when he/she transports the material from the storage area to the worksite.

1.4 REPLACEMENT AND/OR SUPPLEMENTAL MATERIALS

A. Any defective materials discovered prior to the Contractor's acceptance of the materials shall be replaced by the Government.

B. If the quantity of Government-furnished material accepted by the Contractor is insufficient to complete the specified work, supplemental materials complying with these specifications shall be provided by the Government at no expense to the Contractor.

C. The Government shall not replace any materials that, in the opinion of the CO, are damaged or lost due to the Contractor's negligence after the Contractor accepts the materials. Such materials shall be replaced at the Contractor's expense.

1.5 SURPLUS MATERIAL

A. After completion and final acceptance of the work, surplus Government-furnished materials shall be returned to the specified storage area in the same mechanical and physical condition as originally accepted.

B. Damaged surplus materials shall be replaced at the Contractor's expense.

C. The Contractor's liability for surplus materials shall terminate upon unloading and storage at the storage area.

PART 2 – PRODUCTS

2.1 GOVERNMENT-FURNISHED MATERIALS

A. Government-furnished materials shall be limited to:

1. Escape Ramps for used rubber tire casing stock water tanks.

PART 3 – EXECUTION

3.1 GENERAL

A. Installation of Government-furnished materials shall comply with the applicable contract specifications and drawings covering work requiring the use of such materials.

END OF SECTION 01550

SECTION 02201A

TRENCHING, BEDDING, AND BACKFILL

PART I - GENERAL

1.01 This work shall consist of trenching and backfilling for the installation of a High Density

Polyethelene (HDPE) main water line and a Polyvinyl Chloride (PVC) supply pipeline, complete with fittings and appurtenances, as shown on the drawings.

A. The HDPE main line will run from the well source in a direction as flagged by the

Forest Service past one set of used rubber tire casing stock water tanks to the end of the project. It passes another set of used rubber tire casing stock water tanks to a shut-off valve, and on as a drain for the system.

B. The PVC supply line shall run from the main line to the two sets of used rubber tire casing stock water tanks, with the appurtenances as shown on the drawings. The PVC pipe may be replaced by the HDPE pipe as approved by the Contracting Officer

(CO).

1.02 Method of Measurement

A. There will be no separate measurement or payment for trenching or placing and compacting, backfill. Rather, trenching shall be considered to be included in the measurement of the pipelines contained within the trench. No separate measurement for special bedding and imported backfill (if needed) shall be measured.

B. Included in this measurement are the three (3) air relief valves with guard posts installations and the drain line shut-off valve with valve box and guard post installation.

PART II - PRODUCTS

2.01.1 Piping

A. HDPE plastic pipe and fittings shall conform to standards and recommendations of the manufacturer for this type of application.

B. PVC plastic pipe and fittings shall conform to standards and recommendations of the manufacturer for this type of application.

2.02 Joints and Connections

A. All joints and connections shall be made to operate without leakage and shall leave the inside of the line free of any obstruction that may tend to reduce its capacity below design requirements.

B. All fittings (valves, tee’s, etc.) shall be installed in accordance with the recommendatins of the pipe manufacturer.

C. Fittings and appurtenances made of metals subject to corrosion shall be adequately protected by wrapping with plastic tape or coating with high quality corrosion preventative qualitites. Where plastic tape is used for corrosion protection, all surfaces to be wrapped shall be thoroughly cleaned and then coated with a primer compatable with the tape prior to wrapping.

PART III -EXECUTION

3.01 Trench Excavation - All trench excavation shall conform, as near as possible, to the lines as shown on the drawings and as located on the ground by the Forest Service.

A. Classification of Excavation Material - Excavation will be unclassified as to materials and shall include all materials which are normally encountered in the Pine Ridge area of the Pine Ridge Ranger District. The Contractor shall be responsible for field pre-bid observations.

A. Unsatisfactory Material - During excavation, if material which does not meet the backfill requirements (such as structurally unstable material, solid rock, over-sized rock, angular or sharp rock, clods), as determined by the CO, is encountered at the grade line for the pipe, which will not permit proper bedding of the pipe,stop work and consult with the CO. Trenching shall be performed by any acceptable method, as permitted by the Contract General Provisions.

B. Trench Construction

a. The trench bottom shall be uniform so that the pipe will lay on the bottom without bridging. Minimum depth shall be 5 feet. Clods, rock, or uneven spots which could damage or cause non-uniform support to the pipe shall be removed. Where rocks, boulders, or any other material which might damage the pipe are encountered, the trecnh bottom shall be undercut a minimum of 4 inches below final grade and filled with bedding material consisting of sands or compacted fine grained soils.

b. Pipelines may be placed by “plow-in” equipment in lieu of conventional trenching if soils are suitable and rocks and boulders will not be detrimental to the pipe, as approved by the CO.

c. Safety, Shoring, and Protection - The Contractor shall meet the General Safety Orders of the State encompassing this project and the provisions of the Occupational Safety and Health Administration (OSHA): 29 CFR Part 1926.650-.652 Subpart P. Walls of trenches, 4 feet or more in depth, shall be supported by bracing, shoring, or other methods, unless the sides of the trench are sloped to a safe angle, from the bottom of the trench or from the top edge of a steel cage when same is used. If trenches are shored, the trench shall be of proper width to accommodate shoring and bracing, as required, to keep trench walls from caving, and to allow for proper installation of the work. All existing improvements, either on public or private property, will be fully protected from damage.

D. Placement – The pipe shall be placed in the trench as recommended by the manufacturer. The pipe shall be allowed to come to within a few degrees of the temperature that it will have after complete covering prior to any backfill and prior to connecting to other facilities.

a. Care shall be taken to prevent permanent distortion and pipe damage when handling during unusually warm or cold weather. The pipe shall be uniformly and continuously supported over its entire length on firm stable material.

E. Compacting. If required, compact the trench by running wheeled equipment over the trench. It there is more than a 12 inch ditch remaining after compacting, drag material from alongside the trench and place over trench and re-compact.

3.02 Thrust Blocks – Unless otherwise specified, provide thrust control as follows:

A. On pipelines greater than 1 ¼” diameter, thrust shall be controlled at all elbows greater than 45 degrees, all tee connections, and at any locations of potential thrust damage (as required by the CO). The method of thrust control shall be to fill the void between the pipe and the undisturbed trench wall with concrete for a distance of 12 inches along the pipe in each direction from the center of thrust.

3.03 Testing – The pipeline shall be thoroughly tested for leakage.

A. Before testing, every section of competed pipeline between successive valves or other closure shall be carefully flushed in order to remove all confined air or foreign matter.

After each section is flushed, the Contractor may test each separately to satisfy as to the integrity of the construction in each individual section of pipe. At the completion of the project, the Contractor shall test the entire system with the Contracting Officer’s Representative (COR) attending.

B. The line may be uncovered, partially backfilled, or completely backfilled prior to testing. If partially backfilled, all joints and connections shall be left uncovered for inspection, with only the body of the pipe sections covered.

C. If completely backfilled, or “plowed-in”, testing shall be done by pressure testing.

The pipeline shall be pressure tested at the working pressure for two (2) hours. The allowable hourly leakage rate shall not be greater than 0.3 gallons per diameter inch per mile. Should the test exceed this rate, the defect should be repaired until retests show leakage to be within the allowable limits, except that all visible leaks shall be repaired.

D. The above described test shall be made under the supervision of the COR who shall be notified 24 hours prior to testing.

3.04 Backfilling

A. On open trenches, the pipe shall be uniformly and continuously supported. Blocking or mounding shall not be used to bring the pipe to final grade.

B. Backfill should be done after the pipe reaches the same temperature as the soil. This can be done by leaving the trench open overnight before backfilling or any other approved method.

C. The initial backfill (the first six (6) inches) shall be selected material free from sharp edged rocks, stones or clods. Care shall be taken to avoid deformation or displacement of the pipe during initial backfilling operations.

D. The remainder of the backfill shall be placed and spread in approximately uniform layers in such a manner as to completely fill the trench so that there will be no unfilled spaces in the backfill. Mound the backfill soil to replace the soil removed from the trench.

E. All special requirements of the pipe manufacturer shall be strictly observed.

F. Installation and backfilling should be done in a workmanlike manner.

G. The Contractor shall provide and maintain, at all times during construction, ample means and devices with which to promptly remove and properly dispose of all water entering the excavations or other parts of the work without damage to adjacent property. All excavations shall be kept free from standing water. Any damage caused by water in the trench shall be repaired by the Contractor at his expense.

There will be no separate payment for this item.

H. Backfilling will be permitted only after all inspections of piping have been performed and tests completed, when required, and the work to be covered has been approved by the CO. Backfill, which has been improperly placed and/or compacted, shall be corrected, if directed by the CO, by reopening the trench to the depth required to obtain proper compaction. Then the trench shall be refilled and compacted according to specifications at the Contractor’s expense.

3.05 Waste Material Disposal - Any excess excavated material shall be used to mound over the trench.

3.06 Finishing and Cleanup - After the pipeline installation and backfill has been completed, the disturbed area along the pipeline shall be cleaned up by removing all debris and materials not utilized. Any stockpiled topsoil shall be smoothly distributed over disturbed areas and prepared for seeding if required on the drawings.

3.07 The Contractor shall be held liable for a period of one (1) year against defective workmanship and materials.

END OF SECTION

02525 - 1

WATER SUPPLY WELLS

SECTION 02525A

LIVESTOCK WATER WELLS

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes drilling a new operational non-potable well, installing an appro-priate sized solar pump, and installing a pitless adapter.

1. Work shall consist of drilling and developing an operational non-potable stock water well capable of providing a min. of five (5) gallons per minute with an ap-propriate-sized solar pump.

2. All work shall be in accordance to the Nebraska Department of Health and Human Services regulations, NAC 178, Chapters 10 and 12.

3. Additional work shall include casing the final well hole, disinfecting, gravel packing, grouting, and installation of all appurtenances to have an operational well.

4. The contractor is responsible for keeping an accurate drill log report and provide a copy to the Forest Service as well as filing the report with the appropriate agency per Nebraska Department of Health and Human Services regulations.

5. The Contractor shall furnish all materials, labor, equipment, tools, transporta-tion, and supplies necessary to complete the work.

6. See Section 15200 “Water Piping System” for water service piping.

1.2 DEFINITIONS

A. The following are industry abbreviations for plastic materials:

1. PVC: Polyvinyl chloride plastic pipe.

1.3 PERFORMANCE REQUIREMENTS

A. Minimum Tested Water Supply Well Performance Capacity: 5 gal/min.

1.4 UNIT PRICES

A. Unit-Price Amounts: For work performed as shown on the Schedule of Items.

B. Measurement Units for:

1. Well drilling, casings, and screen: Per linear foot of well depth.

a. Includes concrete, gravel pack, bentonite, disinfectant, grout, pitless adapter, and registration of well.

1.5 SUBMITTALS

02525 - 2

A. Product Data:

1. The Contractor shall design and submit certified performance curve and rated capacity of selected well pump and furnished specialties for size of well pump required to meet the 5 gallons per minute rate.

B. Project Record Documents: Record the following data for the non-potable water sup-ply well:

a. Casings: Material, diameter, thickness, weight per foot of length, and depth below grade.

b. Screen: Material, construction, diameter, and opening size.

c. Pitless adapter. Use a standard style of pitless adapter for this type of ap-plication.

d. Pumping Test: Static water level, maximum safe yield, and drawdown at maximum yield.

e. Log: Formation log indicating strata encountered.

f. Alignment: Certification that well is aligned and plumb within specified tolerances.

C. Field Quality-Control Reports: Describe substrata formations, water-bearing for-mations, water levels, well-screen analysis, and performance test data.

1.6 QUALITY ASSURANCE

A. Well Driller Qualifications: The Contractor must hold a current license and meet all applicable standards in the Nebraska Health and Human Services Regulation and Licensure, 178 NAC 10, TITLE 178-Environmental Health un-der Neb. Rev. Stat. 46-1241, known as the Water Well Standards and Contrac-tors’ Licensing Act. The Contractor must provide this license information pri-or to work beginning.

B. AWWA Compliance: Comply with AWWA A100 for livestock water wells.

1.7 PROJECT CONDITIONS

A. The well site and tank locations are located in the Pine Ridge area of northwest Ne-braska. The well location shall be determined by the Forest Service and shall be in the W1/2 SW ¼ of Section 21, T31N, R50W of Dawes County Nebraska (see maps). Access to the site shall be on FSR 767 off East Ash Road near the top of the hill. The pipeline and tanks shall be located south from the well site as shown on the maps. NOTE: the pipeline crosses a steep drainage that feed the south tanks.

B. Well depth is estimated to be approximately 350’ to get to required minimum of 5 gal-lons per minute water flow.

PRODUCTS

02525 - 3

2.1 MANUFACTURERS

A. The following requirements apply for product selection:

1. Available Manufacturers: Subject to compliance with requirements, manufac-turers offering products that may be incorporated into the Work include, but are not limited to, any manufacturers specified.

2.2 WELL CASINGS

A. PVC Casing:

1. Well casing type will be PVC, SDR-26, 160 psi., minimum diameter of five (5) inch (nominal) or industry standard for this type of terrain and depth of well, NSF approved, complying with ASTM F-480 in accordance with ASTM D- 1784.

2. See Nebraska Department of Health and Human Services, Title 178 NAC 12.005.02A.

B. Well Seals: Casing cap, with holes for piping and cables that fits into top of casing and is removable, waterproof, and vermin proof.

2.3 GROUT

A. See Nebraska Department of Health and Human Services Standards, 178 NAC 12, 120003.06 Grout.

2.4 WATER WELL SCREENS

A. Screen Material: Screen shall be of the same diameter, material, and grade as the well casing material. Horizontal slots shall be spaced at .25 inch with 43 slots per foot and a slot width of .025 inch (tolerance of 10% plus or minus). Well screen shall be for a minimum length of 20 feet or as needed to produce the minimum water flow.

1. Screen Couplings: Butt-type, stainless steel, coupling rings.

2. Screen Fittings: Screen with necessary fittings closes bottom and makes tight seal between top of screen and well casing.

3. Maximum Entering Velocity: 0.1 fps.

2.5 PACK MATERIALS

A. Gravel pack: Cheyenne River or North Platte River, clean granular material with a maximum size of ¼ inch. At least 95% of the material shall be retained on the No.

30 sieve.

2.6 DISINFECTANT

A. See State of Nebraska Department of Health and Human Services, Title 178 NAC 12, 12-004.03AC, Regulations Governing Public Water Supply Systems for de-

02525 - 4 contaminating the well. Disinfectant shall be delivered to the job site in its’ origi-nal closed container, bearing the original label indicating the percentage of available chlorine.

2.7 SUBMERSIBLE-TYPE SOLAR WELL PUMPS

A. Available Manufacturers:

1. American Turbine Pump Co.

2. Crane Deming Pumps.

3. Grundfos.

4. ITT Industries; Goulds Pumps.

5. Jacuzzi, Inc.; Jacuzzi Brothers.

6. Johnston Pump Company.

7. Pentair Pump Group; Layne/Verti-Line.

8. Pentair Pump Group; F. E. Myers.

9. Reda.

10. Sta-Rite Industries, Inc.; Water Systems Group.

11. Sterling Fluid Systems (USA), Inc.; Peerless Pump.

12. USFilter/EMU Products.

13. Weber Industries, Inc.

14. Weir Floway Pumps, Inc.

B. Description: Submersible-type, helical rotor well pump complying with HI 2.1-2.5 or AWWA E101, with the following features:

1. Motor: Capable of continuous operation under water, with protected submersi-ble power cable, and producing a minimum of 5 gallons per minute capacity.

2. Discharge: To match the new two (2) inch HDPE waterline.

3. Wiring shall be a minimum of 12/2 submersible and UF wire or as manufactur-er’s design, as approved by the Contracting Officer.

4. Pump shall be able to operate with a minimum of 190W solar panels or as rec-ommended by the manufacturer.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Construct well using rotary drilling method, or as approved by the Contracting Of-ficer. The drill hole will be a minimum size to accommodate the five (5) inch diam-eter casing and extend into clean, water-bearing sand or gravel. The drill hole shall terminate per Department of Health and Human Services requirements..

B. Alignment – Drill hole and well casing shall be vertically aligned to permit unob-structed passage of the five (5) inch (nominal) diameter by 20 foot long well casing pipe for the entire depth of the casing.

02525 - 5

C. Well Screen – Contractor shall install a well screen of the same diameter, material, and grade as the well casing, with the bottom end capped with an unslotted end cap.

The capped end shall rest upon the bottom of the hole.

D. Well Casing – There shall be a minimum clear-opening of two (2) inches around and for the entire length of the well casing before backfilling. The well casing shall ex-tend a minimum of 12 inches to a maximum of 30 inches above the finished ground surface. The earth surrounding the casing must slope away from the well and must be firmly compacted to prevent water from seeping down the casing.

1. Guard Post protection shall be installed around the well casing to protect it from livestock, wildlife, or vehicular damage. See Drawings for design.

E. Well Pipe and Sucker Rod. One inch well pipe shall be used in the well along with sucker rod that meets industry standards for this type of application. Gravel Packing

– Gravel pack material shall be of the type and begin and terminate per Nebraska Department of Health and Human Services requirements for this type of appli-cation.

F. Annular Space. Fill the annular space between the top of the primary aquifer seal to the bottom of the surface seal. See the Nebraska Department of Health and Hu-man Services Standards, 12-003.08B for materials.

G. Install permanent five (5) inch diameter PVC casing, pitless adapter, well screen, gravel pack, and grout. Install first section of casing using industry standard materi-als. Set pitless adapter outlet tying into existing five (5) inch PVC piping at the five

(5) foot depth. See the Nebraska Department of Health and Human Services NAC 178 Chapter 12 for any specific requirements for this type of application.

H. Set casing and liners round, plumb, and true to line.

I. Join casing pipe as follows:

1. Ream ends of pipe and remove burrs.

2. Remove debris from inside and outside casing before installation.

3. Cut bevel in ends of casing pipe and make threaded joints.

4. Clean and make solvent-cement joints.

J. Grout – see Nebraska Department of Health and Human Services Standards, 178 NAC 12, 12-003.07 for grout installation.

1. If grout is used for annular fill, place grout continuously from bottom to top sur-face, to ensure filling of annular space in one operation. Do not perform other operations in well within 72 hours after grouting of casing. When quick-setting cement is used, this period may be reduced to 24 hours.

K. Provide permanent casing with pitless adapter a minimum of 12 inches above finished grade.

02525 - 6

L. Develop wells to maximum yield per foot of drawdown.

1. Extract maximum practical quantity of sand, drill fluid, and other fine materials from water-bearing formation.

2. Avoid settlement and disturbance of strata above water-bearing formation.

3. Do not disturb sealing around well casings.

4. Continue developing well until water contains no more than 2 ppm of sand by weight when pumped at maximum testing rate.

3.2 JOINT CONSTRUCTION

A. Joint construction shall be as industry standard for this type of application.

3.3 CONNECTIONS

A. Piping installation standards shall be as industry standard for this type of application.

3.4 RECORDS AND REPORTS

A. General – The Contractor shall notify the Contracting Officer at least 24 hours in ad-vance of all drilling, installations, development, and testing activities that will be performed.

B. Records – The Contractor shall furnish a completed well log.

C. The Contractor shall furnish the required water well registration to the Nebraska De-partment of Water Resources and pay any associated fees. A draft copy of the regis-tration shall be provided to the Forest Service prior to submission. A copy of the fi-nal registration shall be provided to the Forest Service when submitted.

3.5 FIELD QUALITY CONTROL

A. Plumbness and Alignment Testing: Comply with AWWA A100, Section 8.

B. Samples, Records, and Reports: Take samples of substrata formation at 10-foot (3-m) intervals and at changes in formation throughout entire depth of each water supply well. Carefully preserve samples on-site in glass jars properly labeled for identifica-tion.

C. Furnish samples of water-bearing formation to testing laboratory and well-screen manufacturer for mechanical sieve analysis if required.

D. Prepare reports on static level of ground water, level of water for various pumping rates, and depth to water-bearing strata.

02525 - 7

E. Performance Testing: Conduct final pumping tests as required by the Nebraska Department of Health and Human Services.

1. Arrange to conduct tests, with seven days' advance notice, after test pump and auxiliary equipment have been installed. Note water-level elevations referred to for each assigned datum in well.

2. Provide discharge piping to conduct water to locations where disposal will not create a nuisance or endanger adjacent property. Comply with requirements of authorities having jurisdiction.

3. Provide and maintain equipment of adequate size and type for measuring flow of water, such as weir box, orifice, or water meter.

4. Measure elevation to water level in well.

5. Perform two bailer or air-ejection tests (or applicable tests) to determine ex-pected yield. Test at depths with sufficient quantity of water to satisfy desired yields.

6. Test Pump: Variable capacity test pump with capacity equal to maximum ex-pected yields at pressure equal to drawdown in wells, plus losses in pump col-umns and discharge pipes.

7. Start and adjust test pump and equipment to required pumping rates.

8. Record readings of water levels in wells and pumping rates at maximum in-tervals throughout 24-hour minimum period per Nebraska Department of Health and Human Services Standards.

9. Record maximum yields when drawdown at a depth above top of suction screens after designated times per Nebraska Department of Health and Human Services Standards.

10. Operate pumping unit continuously for eight hours after maximum drawdown is reached.

11. Record returning water levels in wells and plot curves of well recovery rates.

12. Remove sand, stones, and other foreign materials that may become deposited in wells after completing final tests.

F. Water Analysis Testing: The Contractor shall engage a qualified testing agency to perform bacteriological, physical, and chemical analyses of water from fin-ished well and report the results. Make analyses according to requirements of the Nebraska Department of Health and Human Services Standards.

G. Start well pump and adjust controls and pressure setting. Replace damaged and mal-functioning controls and equipment.

3.6 CLEANING

A. Follow water supply well disinfection procedures required by Nebraska Depart-ment of Health and Human Services before testing well pump.

B. Clean tested and developed water supply well of foreign substances. Swab casings us-ing alkalis, if necessary, to remove foreign substances.

02525 - 8

3.7 PROTECTION

A. Water Quality Protection: Prevent well contamination, including undesirable physical and chemical characteristics.

B. Ensure that mud pit will not leak or overflow. When well is accepted, remove mud and solids in mud pit from Project site and restore site to finished grade.

C. Provide casings, seals, sterilizing agents, and other materials to eliminate contamina-tion; shut off contaminated water.

D. Exercise care to prevent breakdown or collapse of strata overlaying that from which water is to be drawn.

E. Protect water supply wells to prevent tampering and introducing foreign matter. Re-tain temporary well cap until installation is complete.

END OF SECTION 02525

03300 - 1

CAST-IN-PLACE CONCRETE

SECTION 03300A

CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes cast-in-place concrete, “Sackcrete”, reinforcement, concrete materials, mix design, placement procedures, and finishes.

1.2 SUBMITTALS

A. Product Data: For each manufactured material and product indicated.

1.3 QUALITY ASSURANCE

A. The Contractor shall be responsible for the quality of concrete, be it commercially obtained or through the use of Sackrete or equal as approved by the Contracting Officer (CO).

PART 2 - PRODUCTS

2.1 MATERIALS

A. Concrete Materials: Commercial concrete shall be composed of cement, fine and course aggregates, and an air-entraining admixture. Other additives may be added only upon the written approval of the CO.

1. Portland Cement: ASTM C 150 or C175, Type II or IIA.

2. Normal-Weight Aggregate: ASTM C 33, uniformly graded, not exceeding 1-

1/2-inch (38-mm) nominal size.

3. Water: Complying with ASTM C 94.

4. Synthetic Fiber: Fibrillated or monofilament polypropylene fibers engineered and designed for use in concrete, complying with ASTM C 1116, Type III, ½ to 1 ½ inches long

5. Air-entraining admixtures shall conform to the requirements of ASTM Specification C 260.

B. Commercial pre-mixed sacks of “Sackcrete” as approved by the CO.

2.2 CONCRETE MIXES

A. Comply with ACI 301 requirements for concrete mixtures. A design mix from a commercial batch plant shall be furnished to the CO for approval prior to placement of the concrete.

03300 - 2

B. Prepare design mixes, proportioned according to ACI 301, for normal-weight concrete determined by either laboratory trial mix or field test data bases, as follows:

1. Compressive Strength (28 Days): 3500 psi

2. The mix shall contain at least 6 sacks of Portland cement per cubic yard of concrete.

3. The concrete shall have air-entrainment content (by volume) of between 4 and 7 percent.

4. Not more than 6 gallons of water shall be used per sack of cement.

C. Synthetic Fiber: Uniformly disperse in concrete mix at manufacturer's recommended rate.

D. Pre-mixed sacks of “Sackcrete” as approved by the CO.

2.3 CONCRETE MIXING

A. Ready-Mixed Concrete: Comply with ASTM C 9.

1. When air temperature is between 85 and 90 deg F (30 and 32 deg C), reduce mixing and delivery time from 1-1/2 hours to 75 minutes; when air temperature is above 90 deg F (32 deg C), reduce mixing and delivery time to 60 minutes.

2. Provide batch ticket for each batch discharged and used in the Work, indicating Project identification name and number, date, mix type, mix time, quantity, and amount of water added.

B. Project-Site Mixing: Measure, batch, and mix concrete materials and concrete using industry standards for this type of work. Mix concrete materials in appropriate drum-type batch machine mixer.

C. The concrete shall be uniform and thoroughly mixed prior to placement.

1. For mixer capacity of 1 cu. yd. (0.76 cu. m) or smaller, continue mixing at least 1-1/2 minutes, but not more than 5 minutes after ingredients are in mixer, before any part of batch is released.

2. For mixer capacity larger than 1 cu. yd. (0.76 cu. m), increase mixing time by 15 seconds for each additional 1 cu. yd. (0.76 cu. m).

3. If approved by the CO, pre-mixed sacks of “Sackcrete” may be applied on-site per manufacturer’s recommendations for this type of work.

EXECUTION

3.1 INSTALLATION, GENERAL

A. The maximum length of time between introduction of the cement to the mix and placement of the concrete in the forms shall not exceed 1 ½ hours for concrete

03300 - 3 temperatures below 85 degrees F. or 45 minutes for concrete temperature above 85 degrees F. Concrete shall not be dropped more than 5 feet vertically.

B. Concrete shall not be placed until the compacted bentonite subgrade has been inspected and approved.

C. Prior to placement of concrete, the bentonite subgrade shall be free of debris, water, ice, snow, or any other substances. The bentonite subgrade shall be firm and damp before placing the concrete. Placement of concrete on mud, dried earth, and uncompacted or frozen bentonite subgrade will not be permitted. Items to be embedded in concrete shall be positioned accurately and firmly anchored.

D. The forms (if needed) shall be wood, plywood, steel or any other approved material and shall be mortar tight. The forms and associated framework shall be substantial and unyielding and shall be constructed so that the finished concrete will conform o the specified dimensions and contours. Form work shall be smooth and free of holes, dents, sags or any other irregularities. Forms shall be coated with non-staining form oil before being set into place. Bolts and rods used for internal ties shall be so arranged that the metal will not be less than 1 inch from the surface when the forms are removed. Forms may not be embedded into the concrete. Wire ties are not permitted. Forms shall not be removed until approved by the CO.

E. Install joint-filler strips (if required) as shown on the drawings.

3.2 CONCRETE PLACEMENT

A. The CO shall be notified 48 hours before concrete is to be placed to allow time to inspect the site.

B. Do not add water to concrete during delivery, at Project site, or during placement unless approved by the CO.

C. Consolidate concrete with mechanical vibrating equipment or equal as approved by the CO.

D. Cold Weather Placing:

1. Protect concrete work from physical damage or reduced strength which could be caused by frost, freezing actions, or low temperatures, in compliance with ACI 306 and as herein specified.

2. Concrete shall not be mixed or placed when the daily minimum temperature is expected to be less than 40 degrees F., unless facilities are provided to prevent the concrete from freezing.

3. Do not use frozen materials or materials containing ice or snow. Do not place concrete on frozen subgrade or subgrade containing frozen materials.

E. Hot Weather Placing:

03300 - 4

1. When hot weather conditions exist that would seriously impair quality and strength of concrete, place concrete in compliance with ACI 305 and as herein specified.

2. Concrete surfaces exposed to the elements shall be kept continuously wet for the first 24 hours of the curing process.

F. Concrete that is honey-combed, damaged, or otherwise defective shall be removed and repaired as directed by the CO.

3.3 FINISHING FORMED SURFACES

A. Immediately after removal of the forms, all holes shall be patched by filling any cavities thoroughly with a patching mortar as approved by the CO.

3.4 FINISHING UNFORMED SURFACES

A. Finish unformed surfaced using industry standards for this type of application.

B. Trowel Finish: Apply a hard trowel finish to surfaces indicated and to floor and slab surfaces exposed to view.

3.5 CONCRETE PROTECTION AND CURING

A. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures using methods applicable to this type of work.

B. Begin curing after finishing concrete, but not before free water has disappeared from concrete surface.

C. Cure unformed concrete for at least seven days as follows:

1. Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for curing concrete, placed in widest practicable width, with sides and ends lapped at least 12 inches (300 mm), and sealed using industry standards for this type of work. Immediately repair any holes or tears during curing period using cover material.

2. The curing compound shall be thoroughly mixed immediately before applying at a uniform rate and be applied per manufacturer’s recommendations.

END OF 03300

SECTION 15200A

WATER PIPING SYSTEM

PART 1 - GENERAL

1.01 This item shall consist of a water system constructed in accordance with these specifications, details, and dimensions shown on the maps and to the lines established on the ground by the Forest Service.

A. The water system shall include all the pipe, trenching, fittings, thrust blocks, valves, connections, and all other incidentals necessary to complete the water system as shown on the drawings and maps and described in the specifications.

1. Other incidentals include the guard post protection installation for three

(3) air valve installations and drain valve guard post protection installation.

B. All items which are required for total completion of the system, beginning with the connection to the main supply waterline at the well and ending at the connection with the tire stock water tanks will be measured and paid for under this section.

C. There is a deep drainage south of the new well along the line the new pipeline will follow. The Contractor is responsible for providing the Forest Service a plan of action on how they will cross.

1.02 Related Work Specified Elsewhere

A. Section 02201—Trenching, Bedding, and Backfill

B. Section 03301—Concrete for Minor Structures

1.03 Method of Measurement: The quantities comprising a water piping system shall be measured as follows:

A. Pipeline: The lineal feet of pipeline shall be the measured slope distance along the centerline of the pipe installed in-place and accepted. The length shall include overflow and drain lines to their end. The length shall include all connections, valves, fittings, branches, and thrust blocks. The length shall include all trenching and backfilling.

B. Concrete Thrust Blocks: The number of concrete thrust blocks of each size installed in-place and accepted. These shall be included in the contract unit price for waterline.

C. No separate measurement or payment will be made for rodent proof drain outlets or for making connections to existing waterlines; rather, payment will be considered to be included in the contract unit price for waterline installation.

PART 2 - PRODUCTS

2.01 Pipe - General: All water lines (pipe and fittings) shall be new and unused, of the type, pressure rating or class, and size (nominal diameter) as shown below.

A. High Density Polyethylene (HDPE): 2 inch HDPE 4710 DR pipe shall be installed from the well source to the stock tanks. The pipe shall meet all ASTM specifications and Standards and must bear the logos showing type of pipe, size, and ASTM standard.

B. Pipe Sleeves (if required): Pipe sleeve material shall match the HDPE 4710 DR pipe material.

2.02 Concrete: Poured-in-place concrete or Sackcrete used for thrust blocks shall be typical for this type of application.

2.03 Gravel drain: Gravel shall be clean, well graded gravel ranging in size from 2 inches maximum to 1/4 inch minimum.

2.04 Rocks: Rocks to be used for outlet protection of the drain line shall be a min. of 2 inches maximum of 6 inches. Type and source may be a local source or as approved by the CO.

2.05 Guard Posts: Guard posts used to protect above ground appurtenances from livestock, animals, and vehicles shall be constructed using the materials and dimensions as shown on the drawings.

PART 3 - EXECUTION

3.01 Trenching, Bedding, and Backfill: Trenching, bedding, and backfill will be in accordance with Section 02201.

3.02 Installation of Pipelines, Fittings, and Accessories: All pipe, fittings, and accessories should be handled and laid in strict conformance to the manufacturer's recommendations.

A. Drains, control valves, and other regulating and controlling devices shall be installed in the main pipe line at locations where required for this type of installation.

1. General: The interior of all pipe, fittings, and other accessories shall be kept as free as possible from dirt and foreign matter at all times. When the pipeline has become dirty on the inside during shipment or storage, it shall be cleaned out using industry standards for this type of material, or as approved by the CO. 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 laid in water, and no pipe shall be laid when trench conditions or the weather is unsuitable for such work, except as approved by the CO. 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 CO, so that no trench water, rodents, earth, or other substance will enter the pipe or fittings.

a. Any section of pipe already laid and found to be defective shall be taken up and replaced with new pipe at the Contractor's expense.

2. Cutting and Handling Pipe: Cutting of pipe for closure pieces or for other reasons shall be done in a neat, workmanlike manner by methods which will not damage the pipe. The pipe and fittings shall be handled in such a manner as to insure delivery and final placement in good, undamaged condition. Particular care shall be exercised not to injure the pipe surfaces or coatings. Damaged pipe shall not be used in the work.

3. Laying Pipeline: Pipe shall be laid according to pipe manufacturer’s recommendations. Placement of pipe in the trench shall be governed by the following:

(1) No pipe shall be placed in the trench until the trench and bedding have been approved by the CO (if applicable);

(2) Pipes shall be laid along the lines as flagged by the Forest Service;

(3) The proper bends (if required) shall be used in order to follow the line as flagged;

(4) No permanent bends will be allowed in any pipe (bending such that the pipe would not return to a straight piece immediately upon release of pressure at the time of making the bend), as applicable;

(5) Bends resulting in tension on joints will not be allowed, if applicable;

(6) Each section of the pipe shall rest upon the pipe bed for the full length of its barrel, as applicable;

(7) The HDPE polyethylene plastic pipe may be weaved in the trench to provide horizontal slack in the line for expansion and contraction. The line under no condition shall be placed under tension.

(8) The pipe shall be cooled or allowed to cool to within 20° F of the shaded trench bottom temperature before backfilling, as applicable;

(9) Backfill with pipe zone material over the pipeline within 24 hours after installing the pipe in the trench, leaving the joints and one foot of pipe on each side of each joint exposed, if applicable;

4. Pipe Alignment and Grade: Pipelines may be relocated slightly, if necessary, to avoid existing obstacles; however, all lines will be installed to slope toward a drain valve.

a. 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. If the alignment requires curvature or deflections in excess of these limitations, the Contractor shall provide special bends or a sufficient number of shorter lengths of pipe to provide angular deflections at the joints within the limit set forth, as approved by the CO.

5. Pipe Joints: Joints shall be made, using similar jointing materials and applied with the proper accessories, in accordance with the manufacturer's instructions. If pipe and fittings are assembled with a lubricant, it must be non-toxic.

3.03 Thrust Blocks (as applicable): Concrete thrust blocks shall be placed at points along the line where the indicated thrust dictates the need for a thrust block. The sizes of thrust blocks shall be approximately 1/8 cubic yard of concrete.