A-01_Technical_Specs_with_Drawings.pdf

IHS-BAO INDIVIDUAL HOMESITES

TECHNICAL SPECIFICATIONS

Reviewed by Todd Rydquist, PE Updated February, 2018

Indian Health Service, Billings Area Office

TRydquist

TR-PE1

CONTENTS

Part 1: General Conditions

01100 – SUMMARY OF WORK

01220 – UNIT PRICES

01350 – FACILITY DESIGN

01770 – CLOSEOUT

Part 2: Technical Specifications

03300 – CONCRETE

26050 – COMMON ELECTRICAL REQUIREMENTS

31200 – EARTHWORK

31250 – ASPHALT PATCHING

33060 – WATER DISTRIBUTION

33080 – SEWER COLLECTION

33801 – INDIVIDUAL WELLS

33802 – CISTERNS

33803 – SPRING DEVELOPMENT

33811 – INDIVIDUAL PRESSURE SYSTEMS

33812 – INDIVIDUAL WATER TREATMENT SYSTEMS

33851 – SEPTIC TANKS

33855 – DRAINFIELD SYSTEMS

33860 – INIDIVIDUAL EFFLUENT AND SEWER LIFT STATIONS

33871 – PUMPHOUSES AND UTILITY BUILDINGS

Part 3: Forms

F-01 – FACILITY TRANSFER CHECKLIST

F-02 - WELL LOG

F-03 - WELL YIELD TEST

Part 4: Standard Details

G-01 – TYPICAL AS-BUILT

G-01 – STANDARD TRENCH DETAIL

W-05 – THRUST BLOCK SETTING AND DIMENSIONS

W-10 – GATE VALVE

W-20 – FIRE HYDRANT

W-30 – WATER SERVICE CONNECTION

W-80 – TYPICAL WELL CONSTRUCTION

W-81 – WELL PUMP INSTALLATION

W-83 – CISTERN

W-84 – SPRING DEVELOPMENT

W-86 – PRESSURE TANK

W-87 – WELL PRESSURE SYSTEM

W-88 – INDIVIDUAL PRESSURE BOOSTER

W-90 – PUMPHOUSE

W-91 – PUMP VAULT

W-93 – YARD HYDRANT

S-01 – STANDARD MANHOLE

S-02 – ALTERNATIVE MANHOLES

S-10 – SEWER SERVICE CONNECTION

S-12 – SEWER CLEANOUT

S-80 – SEPTIC TANK

S-84 – STANDARD DRAINFIELD

S-85 – SAND MOUND

S-86 – ALTERNATIVE DRAINFIELDS

S-91 – DOSING CHAMBER

IHS-BAO INDIVIDUAL HOMESITES TECHNICAL SPECIFICATIONS

01100 – SUMMARY OF WORK 1

01100 – SUMMARY OF WORK

PART 1 - GENERAL

1.1 SUMMARY

A. This set of Specifications is intended to provide technical guidance for installation of individual water and sewer facilities installed under the Indian Health Service, Billings Area (IHS-BAO) housing program.

B. The set is intended to cover most items associated with individual home water and sewer facilities. Additional Sections may be added as necessary for specific situations.

1.2 DESCRIPTION OF SPECIFICATION SET

A. Documents provided in Specifications:

1. General administrative provisions are numbered 01000 – 01999.

2. Technical provisions are numbered 02000 and higher.

3. Standard forms required as closeout submittals.

4. Standard detail drawings.

B. General types of work covered by Specifications.

1. Earthwork, asphalt, and concrete patching.

2. Individual water facilities including wells, pumping systems, cisterns, spring development, individual water treatment, pressure boosting systems, and connection to existing community water distribution systems.

3. Individual wastewater facilities including septic tanks, gravity and pressurized drainfields, alternative systems, individual lift stations and dosing chambers, and connection to existing community wastewater collection systems.

4. Vaults, pumphouses, and other items required for installation of individual sanitary facilities.

C. This Specification set does not include Contracting Documents.

1.3 SAFETY

A. Comply with OSHA regulations regarding construction safety as published in Department of Labor "Safety and Health Regulations for Construction (29 CFR Parts 1910 and 1926)", including all additions and/or modifications thereto which are in effect during the construction of this project. If construction safety regulations are not observed the Project Engineer may issue a stop work order.

1.4 INSPECTION

A. Purpose: Inspection is to assure that workmanship is being performed in conformance with the plans and specifications;

however, inspection does not imply acceptance of the Work.

B. Availability: The Contractor is responsible for informing Inspectors of the availability of work for inspection. Payment may be denied if Inspectors are not given ample opportunity to inspect work.

1.5 SUBMITTALS

A. Submittals need to be approved by Engineer prior to installation.

B. Mark submittals with Project Name, applicable Section, and any other information required to describe the submittal.

C. Submittal process:

1. Provide two sets of each submittal to Engineer.

2. Allow ten working days for review and approval.

3. Submittal will be returned marked “approved”, “approved as noted”, or “not approved.”

4. Correct and resubmit “not approved” submittals.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION (Not Used)

END OF SECTION

01220 – UNIT PRICES 2

01220 – UNIT PRICES

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes unit prices for payment.

1.2 DEFINITIONS

A. Incidental Items: Incidental items are items not listed on a bid schedule which are considered to be a part of a contract bid item. No payment shall be made for incidental items. The following is a partial list of common incidental items. This is not intended to be an all-inclusive list of incidental items:

1. Construction Safety and compliance with all applicable regulations and accepted practices.

2. Excavation, backfill, and compaction.

3. Removal, transportation, and legal disposal of excess materials.

4. Site cleanup.

5. Delivery, freight, and storage.

6. Taxes, fees, overhead, profit, insurance, and all other general business expenses.

7. Thrust blocks and joint restraint for pipeline and valve installations.

8. Traffic control.

9. Well cleaning and disinfection.

10. Unless otherwise noted, all items shown on a standard detail drawing are incidental to the applicable line item.

11. Tribal Employment Rights Office (TERO) fees.

1.3 MEASUREMENT AND PAYMENT

A. All Work will be measured and confirmed by Engineer prior to acceptance of payment requests.

B. Payment is based on actual quantities installed. Quantities listed on bid sheets are estimated and there is no guarantee of quantities to be installed.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION

3.1 GENERAL

A. General units of measurement and abbreviations:

1. Each (EA): Payment per complete individual item installed.

2. Lump sum (LS): Payment of a single sum for completion of a set of items or activity in whole.

3. Linear feet (LF): Payment per foot, measured horizontally along the centerline.

4. Vertical linear feet (VLF): Payment per foot, measured vertically along the centerline.

5. Square feet (SF): Payment per area installed, measured along a flat plane of the item installed.

6. Square yard (SY): Payment per area installed, measured along a flat plane of the item installed.

7. Cubic yard (CY): Payment per loose cubic yard installed or excavated, unless otherwise noted.

8. Hour (HR): Payment per hour actively engaged in a specific activity or installation.

B. Section 3.2 provides clarification on common unit price items. Not all items on the Bid Sheet will be described in this Section. The general unit price items do not mention all possible incidental items.

3.2 GENERAL UNIT PRICE ITEMS

A. Mobilization: If Mobilization is not specifically listed as a line item on the Bid Sheet, it is incidental. Mobilization will be paid one time for each jobsite unless directed by Engineer to demobilize and remobilize to the same jobsite. Demobilization is incidental. Payment will not be made for mobilization onto unauthorized homesites.

B. Pipe: Measurement of pipe is through all incidental valves and fittings.

C. Electrical cable: Conduit, if required, is incidental.

D. Home utility hookup: This item is only for hookup within the walls of a home to existing home plumbing. Connections to existing stubouts outside the home walls are incidental to other items.

E. Pavement, curb, and sidewalk patching: Cutting, removal, transport, and legal disposal of waste material is incidental.

Payment will not be made for patches installed beyond what would reasonably be required.

01220 – UNIT PRICES 3

F. Rock excavation: Obtain approval from Engineer prior to performing rock excavation. No payment shall be made for rock excavation performed without approval.

G. Excess water removal: Excess water removal is defined as water removal requiring equipment rated in excess of 150 gallons per minute. Removal of lesser quantities is incidental. Conveying water to an approved location is incidental. Removal time is measured as time when equipment is actively pumping water at its rated capacity. Setup and takedown of pump is incidental.

H. Horizontal boring: Installed casing is incidental. Utility pipe installed within casing is paid as a separate line item.

I. General excavation: Excavation is normally considered incidental to other line items. Payment of general excavation shall be made only under exceptional circumstances and shall require approval from Engineer J. Well development, well yield testing, mechanical well renovation: Measurement is while that equipment is running and

Contractor is actively engaged in performing the Work. Mobilization, setup, recording, and idle time is incidental.

K. Water quality testing includes sampling, transport, testing, and reporting results.

L. Cistern: Includes cistern, inspection port, sand, overflow plug and gravel, fill pipe, covers, curb stop and box, waterline within cistern, low water alarm and floats. Does not include pumping system, which covered by “water pumping systems.”

M. Spring development: Includes steel basin, cover, pitless adapter, gravel, and plastic. Does not include pumping system, which is covered by “water pumping systems.”

N. Pumphouse: Includes concrete floor, drain gravel, walls, roof, insulation, heater, shelf, light fixture, breaker, receptacle, and electrical hookup.

O. Vault: Includes concrete sections, drain gravel, lid, steps, penetration, mounting board, light fixture, receptacle, heater and shelf, and electrical hookup.

P. Water pumping systems: Includes pump, check valve, pressure tank, tank tee, pump control, electrical hookup, pressure switch, pressure gauge, plumbing hookup, electrical hookup, torque arrestor, pump cradles, pump supports, safety rope, and all items shown on standard details.

Q. Water service connection: Includes main tapping, corporation stop, curb stop, and saddles as necessary.

R. Sewer service connection: Includes main tapping, saddles, wyes, concrete, and rebar.

S. Septic tanks: Risers and effluent filter are incidental. Unless listed as a separate line item, a cleanout between the home and septic tank is incidental.

T. Sand mound installation: Includes surface preparation, placement of sand, soil, and topsoil over the sand mound area, and preparation of sand mound area for drainfield installation.

U. Effluent dosing chambers and individual lift stations: Includes pumps, floats, controls, electrical hookups, disconnects, alarm system, and all items within the vault.

V. Drainfields: Measurement is along the centerline of the chamber or perforated pipe, as installed. Includes excavation, backfill, chambers, gravel, fabrics, and one observation port per drainfield leg. Imported fill and pressurized lateral pipes are paid separately.

W. Imported fill: Includes all cost associated with installation of fill, including transport, storage, and preparation of subgrade prior to install.

01350 – FACILITY DESIGN 4

01350 – FACILITY DESIGN

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes design requirements for individual homesite facilities.

1.2 IHS DESIGN REQUIREMENTS

A. IHS requires facility design to be reviewed and approved by Engineer. Engineer will provide appropriate mark of approval on design documents.

B. Design data provided to Contractor includes the following:

1. Individual site plans.

2. Equipment type and size.

3. Approximate location of water sources.

C. Do not install facilities without receipt and review of approved design documents. Facilities not installed in compliance with approved design documents may be replaced at Contractor’s expense.

PART 2 - PRODUCTS: NOT APPLICABLE

PART 3 - EXECUTION

3.1 SITE PLANS

A. Site plans include location of existing buildings, pavements, utilities, adjacent facilities, and other applicable items.

B. Site plans include location of proposed facilities to be installed.

C. Elevations shall be provided as necessary.

D. Additional details will be provided as necessary.

E. Do not significantly deviate from proposed locations without Engineer’s approval.

3.2 DESIGN DATA

A. Type, size, and configuration of proposed facilities will be provided.

B. Data may be provided on siteplan as appropriate.

C. Data will incorporate Contractor’s submittal data as appropriate.

3.3 STANDARD DETAILS

A. Conform to applicable standard details provided with this Specification set.

03300 – CONCRETE 5

01770 – CLOSEOUT

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes requirements for closeout procedures for completion of Work at an individual homesite.

B. Associated standard detail: G-01 – Typical As-Built.

1.2 CLOSEOUT SUBMITTALS

A. Facility Transfer Documents: Submit all materials required by Section 3.3.

PART 2 - PRODUCTS: NOT APPLICABLE

PART 3 - EXECUTION

3.1 COMPLETION OF THE WORK

A. Complete all approved additions, corrections, or other changes to the Work.

B. Grade disturbed earth to approximately match preconstruction contours and to divert drainage from installed facilities.

C. Remove debris and trash from site.

D. Neatly stack supplies, tools, and other items awaiting removal from the site.

E. Submit Facility Transfer Documents per Section 3.3 to Homeowner.

3.2 FINAL INSPECTION

A. Submit a request to Engineer for Final Inspection per procedures established at Preconstruction Conference.

B. Engineer will contact Contractor to schedule Final Inspection.

C. If incomplete items are noted, a punch list will be submitted to Contractor for completion.

D. Final payment will not be processed until Final Inspection and Punch List have been completed.

3.3 FACILITY TRANSFER DOCUMENTS

A. Contents:

1. Completed Facility Transfer Checklists.

2. As-built drawing:

a. Provide neat, legible, and easy to read drawing.

b. Include the home, driveway, roadway, and other applicable site improvements.

c. Include previously installed water and sewer facilities onsite and on adjacent property.

d. Note all facilities installed, locate from known stationary objects such as building corners and benchmarks.

e. The siteplan provided to the Contractor may be marked up with actual locations of facilities. Note deviations from initial design.

3. Well construction forms, including sketches, well logs, yield tests, and water quality tests.

4. Manufacturer’s Operation and Maintenance manuals: Provide all manufacturer’s installation, operation, and maintenance manuals to the Homeowner. Engineer’s copy of transfer documents does not need to include manuals.

B. Place documents in a secure binder.

C. Review documents with Homeowner.

D. Provide one copy to Homeowner and one copy to Engineer.

3.4 DEMOBILIZATION

A. Remove and legally dispose of all trash and debris onsite as a result of construction operations.

B. Remove unused materials, supplies, tools, and equipment from the site.

03300 – CONCRETE 6

03300 – CONCRETE

PART 1 - GENERAL

1.1 SUMMARY

A. This Section specifies cast-in-place concrete, precast concrete, and concrete patching.

1.2 DELIVERY, STORAGE, AND HANDLING

A. Steel Reinforcement: Deliver, store, and handle steel reinforcement to prevent bending and damage. Avoid damaging coatings on steel reinforcement.

B. Precast units: Support units during shipment and storage to prevent damage. Lift at designated points.

PART 2 - PRODUCTS

2.1 FORM-FACING MATERIALS

A. Form material: Plywood, lumber, metal, or other approved material.

B. Form-Release Agent: Agent that will not bond with or adversely affect concrete surfaces.

2.2 STEEL REINFORCEMENT AND ACCESSORIES

A. Reinforcing Bars: ASTM A 615/A 615M, Grade 60, deformed.

B. Wire fabric: ASTM A 185.

2.3 CONCRETE MATERIALS

A. Portland Cement: ASTM C 150, Type IA or IIIA unless otherwise noted.

B. Aggregates: ASTM C 33, maximum coarse aggregate size of ¾ inches. Free of alkali reactivity.

C. Mixture design:

1. Minimum compressive strength: F’c = 4,000 psi.

2. Water cement ratio: 0.5 maximum.

3. Air content: 5 – 7%.

4. Slump, cast-in-place concrete: 1 – 4”.

D. Admixtures: Provide admixtures certified to be compatible with other admixtures which do not contain calcium chloride.

E. Curing materials: Provide evaporation retarders, covers, or curing compound as necessary to properly cure concrete.

F. Mixing: Comply with ASTM C 94.

PART 3 - EXECUTION

3.1 FORMWORK

A. Design, erect, shore, brace, and maintain formwork to support all loads that might be applied until structure can support loads. Construct forms tight enough to prevent loss of concrete mortar. Fabricate forms for easy removal without hammering or prying against concrete surfaces.

B. Set edge forms for slabs to achieve required finished concrete surface elevations and slopes.

C. Clean forms and adjacent surfaces to receive concrete. Remove debris before placing concrete.

D. Tighten forms and bracing before placing concrete as required to prevent mortar leaks and maintain proper alignment.

E. Coat contact surfaces of forms with form-release agent before placing reinforcement.

F. Remove forms after curing at 50° F for 24 hours if concrete is hard enough not to be damaged.

G. Clean and repair surfaces of forms to be reused.

3.2 STEEL REINFORCEMENT

A. Clean reinforcement of loose rust, mill scale, earth, ice, and other materials that would reduce bond to concrete.

B. Accurately position, support, and secure reinforcement against displacement.

C. Install welded wire reinforcement in longest practicable lengths. Lap edges and ends of adjoining sheets at least one mesh spacing.

3.3 CONCRETE PLACEMENT

A. Verify that installation of formwork, reinforcement, and embedded items is complete.

B. Do not add water to concrete during delivery or placement unless approved by Engineer.

03300 – CONCRETE 7

C. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete will be placed on concrete that has hardened enough to cause seams or planes of weakness. Deposit concrete to avoid segregation.

D. Cold-Weather Placement:

1. Protect Work from frost, freezing actions, or low temperatures

2. When average high and low temperature is expected to fall below 40°F for three successive days, maintain a minimum concrete temperature of 40°F for a minimum of three days.

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

4. Do not use calcium chloride, salt, or other materials containing antifreeze agents or chemical accelerators unless otherwise noted or specified and approved.

E. Hot-Weather Placement:

1. Maintain maximum concrete temperature below 90°F at time of placement. Chilled mixing water or chopped ice may be used to control temperature, provided water equivalent of ice is calculated to total amount of mixing water.

2. Fog-spray forms, steel reinforcement, and subgrade just before placing concrete. Keep subgrade uniformly moist without standing water, soft spots, or dry areas.

3.4 FINISHING FLOORS AND SLABS

A. Float Finish: Consolidate surface with power-driven floats or by hand floating. Repeat until surface is left with a uniform, smooth, granular texture. Apply float finish to all floors and slabs.

3.5 CONCRETE PROTECTING AND CURING

A. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures.

B. Cure concrete by moisture curing, moisture retaining cover, or curing compound.

C. Apply evaporation retarder if hot, dry, or windy conditions exist before or during finishing.

3.6 CONCRETE SURFACE REPAIRS

A. Defective Concrete: Repair and patch defective areas when approved by Engineer. Remove and replace concrete that cannot be repaired and patched to Engineer's approval.

3.7 CONCRETE STRUCTURE PATCHING

A. Cut existing structures a minimum of 12” beyond the edge of the utility trench in a straight line, parallel to the edge of the excavation. Use a concrete saw, forming a rectangular patch.

B. Protect cut surfaces from damage.

C. Recut crooked or damaged surfaces.

D. Install new concrete to the same depth as existing depth or 4”, whichever is greater.

E. Install #4 rebar dowels between new and existing concrete. Embed dowels 12” into existing and new concrete and bond to existing concrete with an epoxy adhesive.

F. Stockpile demolished concrete in an area which will not block driveways, damage existing improvements, or disrupt vehicular traffic.

G. Remove demolished concrete from site and legally disposed of as soon as is practical.

26050 – COMMON ELECTRICAL REQUIREMENTS 8

26050 – COMMON ELECTRICAL REQUIREMENTS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Electrical penetrations.

2. Building wires and cables rated at 600V or less.

3. Electrical panels and load centers.

4. Motor starters and disconnects.

5. Common wiring devices, including switches, receptacles, and lights.

1.2 SUBMITTALS

A. Product Data: For each type of electrical panel, load center, motor starter, and disconnect provided. Include dimensions, electrical ratings and characteristics, and maintenance and operational data.

PART 2 - PRODUCTS

2.1 CONDUCTORS AND CABLES

A. General:

1. Comply with NEMA WC 70.

2. Use cable of sufficient size to limit overall voltage drop from electrical service to pumps to less than two percent.

3. Comply with recommendations of equipment manufacturers.

B. General wiring: Use nonmetallic sheathed cable, type NM.

C. Grounding conductors: Copper, green insulation if insulated.

D. Buried wire: Type UF.

E. Submersible cable: Minimum of 0.03” of moisture resisting rubber insulation and 0.03” neoprene jacket wall for mechanical protection.

2.2 CONNECTORS AND SPLICES

A. Description: Factory-fabricated connectors and splices of size, ampacity rating, material, type, and class for application and service indicated.

2.3 ENCLOSURES:

A. General: Contractor shall supply enclosures for all panels, starters, controls, and disconnects. Panels shall be supplied to meet the following requirements:

1. Indoor dry and clean locations: NEMA type 1.

2. Wet or damp indoor locations: NEMA type 4.

3. Outdoor locations: NEMA type 3R.

2.4 PANELBOARDS

A. Type: NEMA PB 1, lighting and appliance branch-circuit type.

B. Mains: Circuit breaker.

C. Branch Overcurrent Protective Devices: Plug-in or Bolt-on circuit breakers, replaceable without disturbing adjacent units.

2.5 DISCONNECT DEVICES

A. Molded-Case Circuit Breaker (MCCB): Comply with UL 489, with series-connected rating or interrupting capacity to meet available fault currents.

B. Fused Switch: NEMA KS 1, Type HD; clips to accommodate specified fuses; lockable handle.

2.6 MOTOR STARTERS AND CONTROLS

A. General: Provide full voltage motor starters integrated with contactor, overload relay, HOA, and start and stop buttons or switch.

B. Starter shall be within enclosure appropriate to anticipated conditions.

C. Overload relay shall be fitted with fixed bimetallic elements.

26050 – COMMON ELECTRICAL REQUIREMENTS 9

D. Trip current set via an infinitely adjustable dial designed for the motor’s current range.

E. Motor controls, if required, shall be mounted within same enclosure as starters.

2.7 MISC WIRING DEVICES:

A. Straight blade receptacles, 125V, 20A, UL 498.

B. GFCE receptacles: straight blade, 125V, 20A, UL 498, include indicator when device is tripped.

C. Incandescent lighting fixtures: UL 1598.

D. Exterior lighting fixtures: Listed and labeled for installation in wet locations.

PART 3 - EXECUTION

3.1 COMMON REQUIREMENTS FOR ELECTRICAL INSTALLATION

A. Comply with NECA 1.

B. Equipment: Install to facilitate service, maintenance, and repair or replacement of electrical equipment and other nearby installations. Connect to facilitate future disconnecting with minimum interference with other items in the vicinity.

C. Right of Way: Give to piping systems.

3.2 ELECTRICAL PENETRATIONS

A. Install all wiring through penetrations within electrical conduit. Conduit exposed to sunlight must be UV resistant.

B. Concrete and Masonry slabs and walls:

1. Install cast iron or galvanized steel pipe sleeves for penetrations unless drilled or formed openings are used.

2. Extend sleeves installed in floors 2 inches above finished floor level.

3. Size penetrations to provide ¼” annular space between sleeve and conduit.

4. Seal space inside and outside of penetration with grout.

C. Electrical penetrations through other materials:

1. Install manufactured seal intended for use in material which is receiving the electrical penetration.

2. Install per manufacturer’s written instructions to ensure a weather and water proof seal.

3.3 INSTALLATION OF CONDUCTORS AND CABLES

A. Conceal cables in finished walls, ceilings, and floors, unless otherwise indicated.

B. Use manufacturer-approved pulling compound or lubricant where necessary.

C. Use pulling means that will not damage cables.

D. Install exposed cables parallel and perpendicular to surfaces of exposed structural members, and follow surface contours where possible.

3.4 CONNECTIONS

A. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B.

B. Make splices and taps that are compatible with conductor material and that possess equivalent or better mechanical strength and insulation ratings than unspliced conductors.

3.5 PANELBOARDS, DISCONNECTS, MOTOR STARTERS

A. Mount enclosure plumb and rigid without distortion of box.

B. Install filler plates in unused spaces.

C. Arrange conductors in gutters into groups and bundle and wrap with wire ties.

D. Create a directory to indicate installed circuits.

3.6 FIELD QUALITY CONTROL

A. Perform tests and inspections to confirm proper operation of electrical installations.

B. Remove and replace malfunctioning units and retest.

31200 – EARTHWORK 10

31200 – EARTHWORK

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes excavation and backfill for utility trenches and structures, and directional boring.

B. Associated standard detail: G-02 – Typical Trench Excavation.

1.2 DEFINITIONS

A. Rock:

1. Solid Rock: Large masses of rock which cannot be excavated without drilling, blasting, or the use of rippers.

2. Loose rock: Boulders having an aggregate volume of one cubic yard or more excavated from a single location. Boulders are defined as rock with a diameter of one foot or larger. Separately excavated boulders are not loose rock.

1.3 SUBMITTALS

A. Compaction testing: Submit within 24 hours of receipt from laboratory.

1.4 EXISTING UTILITIES

A. Contact utility locator service for homesite area prior to excavation.

B. Do not interrupt existing utilities unless permitted in writing by Utility Manager in compliance with Utility requirements.

C. Notify Utility Manager and Engineer at least two days before proposed utility interruption.

D. Repair all damaged utility pipe and structures to the satisfaction of the Utility Manager.

PART 2 - PRODUCTS

2.1 SOIL MATERIALS

A. Utility Trench backfill materials:

1. Bedding Material: Well graded sand with particles no greater than 1/4-inch and with no more than five percent passing a number 200 sieve, free of organic matter, frozen material, debris and rubbish.

2. Initial backfill: Well graded material free of organic matter, frozen material, debris, rubbish and rocks greater than one inch.

3. Final backfill: Material free of frozen material, debris, and rubbish. Rocks larger than six inches are not permitted within six inches of the surface.

B. Structural backfill: Sand or gravel base soils with less than 50 percent passing a number 200 sieve, free of rock or gravel larger than 3 inches in any dimension. Free of debris, waste, frozen materials, or other deleterious material.

C. Subbase Material: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; with at least 90 percent passing a 1-1/2-inch sieve and not more than 12 percent passing a No. 200 sieve.

D. Base Material: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; with at least 95 percent passing a 1-1/2-inch sieve and not more than 8 percent passing a No. 200 sieve.

E. Stockpile soil materials without intermixing. Place, grade, and shape stockpiles to drain surface water. Stockpile materials away from edge of excavations. Do not store within drip line of trees.

PART 3 - EXECUTION

3.1 GENERAL

A. Protect structures from damage caused by settlement and other hazards created by earthwork operations.

B. Grade areas adjacent to excavation and prepared subgrades to prevent water from entering work areas.

C. Remove water from excavations and allow to dry prior to continuing work.

D. Place soil materials, fills, and backfills on subgrades free of mud, frost, snow, or ice.

E. Excavate surfaces under structures to indicated lines, cross sections, elevations, and subgrades.

3.2 EXCAVATION AND BACKFILL FOR UTILITY TRENCHES

A. Excavate trenches to indicated gradients, lines, depths, and elevations.

B. Excavate trenches to uniform widths to provide a minimum of 12 inches clearance on each side of pipe or conduit.

C. Excavate trenches 4 inches deeper than bottom of pipe elevation to allow for bedding material.

D. Place bedding material from 4 inches below bottom of pipe to horizontal midpoint of pipe.

31200 – EARTHWORK 11

E. Place initial backfill from top of bedding to 12 inches above top of pipe.

F. Place final backfill from top of initial backfill to top of trench for trenches not beneath structures.

G. For trenches beneath structures, use structural fill from the top of initial fill to subgrade.

H. Encase pipe less than 30 inches below top of roadways in 4 inches of concrete.

I. Place subbase and base material as directed by Engineer.

J. Plow or scarify sloped surfaces steeper than 4:1 to allow fill material to bond with existing material.

K. Uniformly moisten backfill layers to within 2 percent of optimum moisture prior to compaction. Remove and replace saturated soils to meet specified compaction.

3.3 COMPACTION

A. Place structural fill, subbase, and base materials in equal layers of 6” or less.

B. Place all other soil materials in layers not more than 12” inches in loose depth.

C. Place soil materials evenly and uniformly on all sides of structures.

D. Compaction areas under structures to 95 percent per ASTM D 698.

E. Undeveloped areas may be wheel rolled and mounded for compaction.

F. Compaction testing is required for all fill and backfill beneath structures at a frequency determined by Engineer. Contractor to engage a qualified testing agency to perform compaction testing where required.

G. When required compaction is not achieved, scarify, moisten and recompact, or remove and replace soils. Testing will be repeated at Contractor’s expense until requirements are met.

3.4 GRADING

A. General: Uniformly grade areas to a smooth surface, free of irregular surface changes. Provide a smooth transition between adjacent existing grades and new grades. Slope grades to direct water away from buildings and to prevent ponding.

3.5 DIRECTIONAL BORING

A. General: Conform to the requirements of the owner of the roadway or other structure above directional boring. If no requirements exist, comply with the following:

B. Place boring pits so that the distance from the edge of the structure to the edge of the pit is greater than the elevation difference between the edge of the structure and the bottom of the pit.

C. Install piping within casing for the full length of the directional bore.

D. Take soil chemistry and other local conditions into account when selecting casing material.

E. Perform directional boring to maintain required slopes and elevations.

F. Maintain the integrity of pipe joints while pulling pipe.

G. Pressure test pipe prior to filling excavation.

3.6 PROTECTION

A. Protect newly graded areas from traffic, freezing, and erosion. Keep free of trash and debris.

B. Repair and reestablish grades surfaces become eroded, rutted, settled, or lose compaction.

C. Where settling occurs before Project correction period elapses, remove finished surfacing, backfill with additional soil material, compact, and reconstruct surfacing.

3.7 DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. Disposal: Unless otherwise noted, transport surplus satisfactory soil to designated storage areas on Owner's property.

Stockpile or spread soil as directed by Engineer.

3.8 GENERAL EROSION AND SEDIMENT CONTROL PRACTICES:

A. Provide erosion control measures to ensure that rivers, streams, lakes, and other waterways are protected from contamination and deposit of silt and other materials. Inspect and maintain erosion control systems to ensure continued effectiveness.

31250 – ASPHALT PATCHING 12

31250 – ASPHALT PATCHING

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes patching asphalt pavement.

1.2 SUBMITTALS

A. Installer qualifications: Submit a statement of installer qualifications. Installer shall have successfully completed work similar to the Work described in this Section. Include a minimum of three successful installations in the statement.

B. Asphalt job mix design: Submit a copy of design proposed for the Work.

1.3 QUALITY ASSURANCE

A. Comply with “The Asphalt Handbook,” by the Asphalt Institute, unless otherwise noted.

B. Environmental limitations: Do not apply asphalt materials if substrate is wet, excessively damp, or if the following requirements are not met:

1. Prime and tack coats: Minimum surface temperature of 60°F.

2. Asphalt base course: Minimum surface temperature of 40°F and rising at time of placement.

3. Asphalt surface course: Minimum surface temperature of 60°F and rising at time of placement.

PART 2 - PRODUCTS

2.1 AGGREGATES

A. Coarse aggregate: ASTM D 692. Sound, angular crushed stone, crushed gravel, or properly cured blast furnace slag.

B. Fine aggregate: ASTM D 1073. Sharp edged, natural sand or sand prepared from stone, gravel, properly cured blast furnace slag, C. Mineral filler: ASTM D 242. Rock or slag dust, hydraulic cement, or other inert material.

2.2 COATINGS

A. Prime coat: ASTM D 2027. Medium curing cutback asphalt, or asphalt emulsion prime coating. Comply with state DOT requirements.

B. Tack coat: ASTM D 977 or D 2397. Emulsified asphalt or cationic emulsified asphalt, slow setting, factory diluted in water, of suitable grade and consistency for application.

2.3 ASPHALT BINDER MATERIAL

A. Recommended by the manufacturer for expected installation and service conditions.

2.4 COLD-MIX ASPHALT

A. Contractor may use asphalt cold mix if allowed by owner of asphalt roadway and approved by Project Engineer.

PART 3 - EXECUTION

3.1 PREPARATION

A. Cutting: Cut existing asphalt a minimum of 24 inches beyond the edge of utility trench. Cut in a straight line, parallel to the edge of the excavation. Use a saw or air hammer with spade shaped bit. Form a rectangular patch shape, as regular as practical. Damaged or crooked cuts will be recut prior to installation.

B. Place base material to a depth of 6” or the depth of adjacent base material, whichever is greater. Before paving, proof roll the base. Excavate, replace, and recompact areas that yield excessively or crack under loads.

C. Surface preparation: Assure the area is true to line and grade and dry. Clean the surface of all loose screenings and other loose or foreign material

3.2 COATINGS

A. Prime coat: Apply uniformly over surface of compacted base at a rate of 0.15 to 0.50 gal/sq. yd. Apply enough material to penetrate and seal, but not flood surface. Allow coat to cure per manufacturer’s instructions.

B. Tack coat: Apply uniformly to existing surfaces of previously constructed asphalt or Portland cement concrete paving, and to surfaces abutting new asphalt pavement. Apply at a rate of 0.05 to 0.15 gal/sq. yd. Allow tack coat to cure per manufacturer’s instructions.

31250 – ASPHALT PATCHING 13

3.3 PLACEMENT

A. The preferred method of spreading is by motor grader, however, in small areas, where mechanical finishing equipment is not practical, place and spread mix by hand.

B. Uniformly distribute material to avoid segregation of coarse and fine aggregate. Do not broadcast material.

C. During the spreading operation, loosen and uniformly distribute all material using lutes or covered rakes. Reject material that has formed into lumps and does not break down easily.

D. Following placing and before compacting, check the surface with templates and straightedges and correct all irregularities.

Meet the following tolerances:

1. Base course: Maximum variation 5/16” in 10 feet.

2. Surface course: Maximum variations ¼” in 10 feet.

3. Correct irregularities that may develop before completion of rolling by loosening the surface mix and removing or adding materials as required.

E. Compact paving as soon as placed hot-mix asphalt will bear weight. If allowed, compact cold-mix asphalt as soon a placed and leveled. Compact each course to a minimum of 92 percent of maximum theoretical density per ASTM D 2041. All minor surface projections, joints, and minor honeycombed surfaces must be rolled smooth to grade.

3.4 REPAIRS

A. Remove areas that are defective or contaminated with foreign materials, cutting existing surfaces per the requirements of this Section. Replace with new asphalt compacted to specified density and surface tolerances.

3.5 DEMOLISHED ASPHALT:

A. Demolished asphalt should be stockpiled in an area which will not block driveways, damage existing improvements, or disrupt vehicular traffic.

B. Remove and legally dispose of demolished asphalt as soon as is practical.

33060 – WATER DISTRIBUTION 14

33060 – WATER DISTRIBUTION

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes the following:

1. Water main pipe and appurtenances.

2. Water service pipe and appurtenances.

3. Well drop pipe.

B. Associated standard details:

1. W-05 – Thrust Block Setting and Dimensions

2. W-10 – Gate Valve.

3. W-20 – Fire Hydrant.

4. W-30 – Water Service Connection.

5. W-93 – Yard Hydrant.

1.2 SUBMITTALS

A. Product Data: Fire hydrants, valves, valve boxes, curb stops, corporation stops and specialties.

B. Pressure testing results.

1.3 QUALITY ASSURANCE

A. Comply with the requirements of the utility company supplying water and the authorities having jurisdiction.

B. Do not install used materials.

1.4 DELIVERY, STORAGE, AND HANDLING

A. Ensure that materials are dry and internally protected against rust and corrosion. Support off ground or pavement.

B. Protect materials against damage to threaded ends and flange faces.

C. Set valves closed to prevent rattling.

D. Do not remove end protectors until ready for construction.

E. Use sling to handle large valves and fire hydrants. Do not use handwheels or stems as lifting or rigging points.

F. Protect plastic pipe from direct sunlight. Support to prevent sagging and bending.

1.5 PROJECT CONDITIONS

A. Do not interrupt water service unless permitted in writing by Utility Manager. Notify Utility manager no fewer than seven days in advance of proposed interruption of service.

B. Coordinate all connections to existing water mains with Utility Manager.

PART 2 - MATERIALS

2.1 WATER MAIN PIPE AND APPURTENANCES

A. PVC Pipe:

1. Conform to AWWA C900, Class 150, with bell end with gasket, and with spigot end.

2. Do not install pipe with scratches, gouges, or grooves deeper than one tenth (0.10) inch.

3. Fittings and fitting materials:

a. PVC Fabricated Fittings: AWWA C900, Class 150.

b. PVC Molded Fittings: AWWA C907, Class 150.

c. Push-on- or Mechanical- Joint, Ductile-Iron Fittings: AWWA C110 or AWWA C153.

B. Gate valves: AWWA C-509; resilient seated; mechanical joints; 2-inch square operating nut opening counter-clockwise.

Provide Mueller A-2360-20 or approved equal. Provide telescoping valve box.

C. Fire Hydrants: AWWA C 502; 150 psi; freestanding; one 4 ½ inch outlet; two 2 ½ inch outlets; 5 ¼ inch main valve; cast iron body; interior coating per AWWA C 509; outlet threads per NFPA 1963.

2.2 WATER SERVICE PIPE AND APPURTENANCES

A. PE water service pipe: Ultra-high molecular weight polyethylene pipe, 200 psi, AWWA C 901. Compression or Insta-tite fittings.

B. Copper water service pipe: ASTM B 88 type K or L, water tube, annealed copper.

C. PEX water service pipe: AWWA C904 cross-linked polyethylene tubing with mechanical insert or crimp fittings.

33060 – WATER DISTRIBUTION 15

D. Service Saddles: Stainless steel, Smith Blair style 371,with CC thread or approved equal E. Corporation Stops: Mueller No. H-15009 or H-15005 “CC” thread, or approved equal.

F. Curb Stops: Mueller No. H-15159 or H-15156, or approved equal.

G. Curb Boxes: Mueller No. H-10300, extension type, or approved equal, Minneapolis pattern, 1-1/4 inches in diameter with stationary rod, extended length of 78 inches.

H. Service Couplings: Mueller No. 15404 or 15408 or approved equal.

I. Yard hydrants: Freezeless yard hydrants with a one-piece variable flow plunger, tamperproof lock, Teflon impregnated packing, drain below frost line, and a long life valve seat. Woodford model W34 or approved equal.

J. Freezeless water connector: ¾” NPT outlet head, 15 W portable insert heater, bonded polyurethane insulation, and sanitary tight-line design. Woodford Thermaline or approved equal.

K. Water meters and pits: Meet all requirements of the water utility.

2.3 DROP PIPE AND FITTINGS

A. General: Conform to manufacturer’s recommendations for maximum pump setting depth for all drop pipe materials.

B. PE pipe: Ultra-high molecular weight polyethylene pipe, ASTM D-2239, 160 psi. No fittings from pitless adapter to pump. Brass, extra-long insert fittings, with integral eye for installation of a safety rope.

C. PVC pipe: Schedule 80 PVC, ASTM D 1785. Threaded or locking splined fitting design. Provide for installation of a pump safety rope.

PART 3 - EXECUTION

3.1 GENERAL

A. Use pipe and fittings according to materials and sizes shown on plans.

B. Use transition couplings and special fittings with pressure ratings at least equal to piping pressure rating.

C. Do not use unions for underground piping.

D. Tap water main according to requirements of water utility company.

E. Comply with manufacturer’s installation recommendations.

3.2 WATER MAIN AND APPURTENANCES

A. General Installation:

1. Bury depth: 6’ minimum.

2. Clean interior of pipe of all foreign matter before joining.

3. Sewer main separation and crossings:

a. Install water mains at least 10 feet horizontally from any existing or proposed sewer pipe or appurtenance.

b. Provide a minimum vertical distance of 18 inches between crossing water and sewer pipe. Install to place sewer pipe joints as far as possible from the crossing.

4. Water-Main Connection: Arrange with utility company for connection.

B. PVC pipe installation:

1. Pipe: Install per AWWA C-605.

2. Joints: Construct with elastomeric seals and lubricant per AWWA C900.

C. Dissimilar materials joints: Use adapters compatible with both piping materials and system working pressure.

D. Thrust blocking: Install thrust blocks on gate valves, hydrants, fittings, and changes in direction in accordance with details.

Tie vertical fittings to thrust blocks with rebar. Alternative means of joint restraint may be used at upon approval by Engineer.

E. Valve installation: Comply with AWWA C600 and AWWA M44. Install each underground valve with stem pointing up and with valve box.

F. Fire hydrant installation:

1. Clean hydrant of all foreign matter prior to installation.

2. Install hydrant plumb with pumper nozzle pointing towards street a minimum of 18” above finish grade.

3. Pack base section with clean coarse pea gravel to 18” above and around the drain opening.

4. Install three barrier posts around each hydrant. Provide 4” concrete filled galvanized pipe posts set 30” into the ground, set in concrete.

3.3 WATER SERVICE AND APPURTENANCES

A. Install service lines at right angles from the water mains to the property lines.

B. Provide minimum cover of six feet over the top of the pipe and a minimum of ten feet separation from sewer service lines.

C. Seal service lines not connected to a home, backfill, and mark the termination with a 2 by 4 extended 2 feet above ground.

33060 – WATER DISTRIBUTION 16

D. Place corporation stops at an angle of thirty (30) degrees above the horizontal.

E. For expected flows under 12 gpm or pipe runs under 300’, install 1” IPS pipe. For larger flows or pipe runs, install 1 ¼”

IPS pipe or as directed by Engineer.

F. Yard hydrant: Install per manufacturer’s instructions. Provide a minimum bury depth of 6’.

G. Freezeless water connector: Install per manufacturer’s instructions. Provide at all trailer home locations.

H. Water meters and pits: Install per manufacturer’s written instructions and all applicable parts of AWWA C 700. Provide connectors compatible with meter and piping materials. Provide a polystyrene meter jacket for meters installed where subfreezing temperatures may be encounters. Install top of meter pit a minimum of 1 inch above final grade, grade area to drain water from pit.

3.4 FIELD QUALITY CONTROL

A. Hydrostatic Testing for Water Mains

1. Comply with applicable AWWA standards.

2. Contractor has the option of performing test before or after backfilling, however, pipe not meeting specifications may be removed at Contractor’s expense.

3. Subject water main to a hydrostatic pressure test at 50 psi above maximum normal operating pressure. Assume a maximum normal operating pressure of 100 psi if no value is provided. The test will last a minimum of one hour.

4. Allowable leakage in gallons per hour:

Nominal Pipe Size Allowable leakage per 1000 feet of pipe 150 psi 200 psi

4” .33 .38 6” .50 .57 8” .66 .76 10” .83 .96

B. Carefully examine exposed pipes, fittings, valves, hydrants, and joints for leakage during the test. Promptly repair any identified leaks. Replace cracked or defective pipes, fittings, valves, or hydrants. Repeat testing until section meets allowable requirements.

C. Water Service Lines: Test water service lines for leakage at maximum expected working pressure for a minimum of one hour. Promptly repair any identified leaks.

D. Prepare reports of testing activities.

3.5 CLEANING AND DISINFECTION

A. Cleaning pipe systems:

1. Purge new and altered, extended, or repaired water-distribution piping systems before use.

2. Purge per methods required by authorities having jurisdiction or NFPA 24 if no method is required.

3. Flush piping system with clean potable water until dirty water does not appear at outlet points.

B. Disinfection: 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. If any test fails required bacteriological testing, repeat disinfection procedures.

33080 – SEWER COLLECTION 17

33080 – SEWER COLLECTION

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes sewer main pipe, sewer service pipe, manholes, and appurtenances.

B. Associated standard details:

1. S-01 – Standard Manhole

2. S-02 – Alternative Manholes

3. S-10 – Sewer Service Connection.

4. S-12 – Sewer Cleanout.

1.2 SUBMITTALS

A. Product data for sewer service saddles.

B. Shop drawings for manholes.

PART 2 - MATERIALS

2.1 SEWER PIPE

A. PVC; SDR 35; ASTM D-3034.

B. Pipe joints: ASTM D-3212.

C. Make connections to existing sewer pipe using manufacturer's approved adapter coupling or collar.

2.2 SEWER SERVICE SADDLES

A. Solvent weld type with stainless steel clamps; ASTM D-3034.

B. Gasketed wye branches; ASTM D-3212.

2.3 SEWER MANHOLES

A. Manhole Types:

1. Standard manholes: Greater than seven feet in depth to invert. Provide eccentric cone top section.

2. Shallow manholes: Less than seven feet in depth. Use a vertical top section with a precast concrete cover.

B. Fabrication:

1. Precast concrete; ASTM C-478.

2. Floor: Provide a smooth floor with semi-circular invert channels conforming to the inside of the adjacent sewer section.

Construct changes in direction with as large a radius and the manhole will permit.

3. Cover and frame: Cast iron, ASTM A-48. Provide a vented 24” diameter cover with appropriate lifting lugs and the word SEWER cast in it. Total weight of cover and frame shall be at least 300 lb.

4. Steps: Eight inch wide aluminum, steel, or cast iron steps with a corrosion resistant coating. Project a minimum of 4 inches towards the center of the barrel. 400 lb minimum pullout resistance and 800 lb vertical resistance.

5. Pipe-manhole connection: Rubber boot sized for the sewer main secured internally to opening. Seal boot to pipe with a steel clamp.

6. Grout: Non shrink.

7. Sealant: Ram-Nek or equivalent.

8. Exterior sealant: Non-asbestos fiber coating.

PART 3 - EXECUTION

3.1 SEWER MAIN

A. Install sewer pipe to grade and alignment shown on plans with spigot ends pointing in the direction of flow.

B. Use lubricants in accordance with manufacturer’s recommendations.

C. Do not install pipe joints within manhole excavation.

3.2 MANHOLES

A. Install precast manhole sections per ASTM C 891.

B. Seal all barrel sections with Ram-Nek or equivalent.

C. Grout the exterior of manhole-pipe connections.

D. Apply exterior coating to manhole sections prior to backfill.

33080 – SEWER COLLECTION 18

E. Set tops of frames and covers flush with finished surface of manholes that occur in pavements. Set tops 2 inches above finished surface elsewhere, unless otherwise indicated

3.3 SEWER SERVICE PIPE

A. Install sewer pipe to grade and alignment shown on plans. If no slope is given, install with a minimum slope of 2%. If no alignment is given, install service pipe at a 90° angle to the sewer main. Maintain a constant slope to the sewer main.

B. Connect to sewer main using approved saddles with flow line installed at a 45° angle to the main pipe.

C. Avoid horizontal changes in direction. If a horizontal change is unavoidable, install a horizontal cleanout.

D. Install a cleanout on the service line within the homeowner’s property between the main and the home.

E. Service connections not connected to homes: Cap and mark with a two by four extending 2’ above ground.

3.4 CONNECTION TO EXISTING SEWER MAIN

A. Reroute sewer around the existing manhole to allow cleaning and connection.

B. New pipe shall enter existing manholes between 0.1 and 0.2 feet above the invert of the manhole.

C. Grout the junction inside the manhole to assure a smooth flow line.

D. Grout the exterior of the manhole to preclude leakage.

E. Allow concrete to cure for 12 hours prior to restoring flow to the manhole.

3.5 DEFLECTION TESTING

A. Engineer will inspect sewers to check for pipe deflection using artificial light or reflected…