J03 Georgeville WW Technical Specifications - Construction.pdf

GEORGEVILLE WASTEWATER IMPROVEMENTS

SECTION 00 31 32 – GEOTECHNICAL DATA PAGE 1 OF 1

SECTION 00 31 32

GEOTECHNICAL DATA

PART 1 - GENERAL

1.01 SUMMARY

A. Location of Work: Georgeville, Klickitat County, Washington.

1. A geotechnical report has been prepared for the proposed Georgeville Community Wastewater Improvement Site.

1.02 LIMITATIONS OF GEOTECHNICAL DATA

A. Soil logs represent the soils and water table at the location and time the logs were completed. Information may vary based on time of year and other environmental conditions.

1.03 ATTACHMENTS

A. Attachment A – Geohydrology Assessment, Georgeville, WA, July 27, 2017, White Shield, Inc.

END OF SECTION

ATTACHMENT A

SECTION 03 30 00 – CAST IN PLACE CONCRETE PAGE 1 OF 4

SECTION 03 30 00

CAST-IN-PLACE CONCRETE

A. This section includes provisions for cast-in-place concrete used for building foundations, tank anchorage, and other locations as identified on the plans.

1.02 RELATED WORK

A. Section 13 34 23 – Fiberglass Control Building B. Section 33 34 10 – Equalization Tank

1.03 REFERENCES

A. ASTM C33 – Standard Specification for Concrete Aggregates.

B. ASTM C94 – Standard Specification for Ready Mix Concrete.

C. ASTM C150 – Standard Specification for Portland Cement.

D. ASTM A185 – Welded Steel Wire Fabric, Plain for Concrete Reinforcement

E. ASTM A615 – Deformed and Plain Billet-Steel Bars for Concrete

Reinforcement

1.04 QUALITY ASSURANCE

A. Obtain cement and aggregate from the same source for all work.

PART 2 - PRODUCTS

2.01 CONCRETE MATERIALS

A. Cement: ASTM C150, Portland Cement Type – IA, Air Entrained.

B. Aggregates: ASTM C33.

1. Fine Aggregates:

a. Fine aggregates shall be clean, hard, tough, water sound and free of deleterious substances.

b. One hundred percent passing 3/8 inch sieve.

c. At least fifty percent passing No. 16 sieve.

SECTION 03 30 00 – CAST IN PLACE CONCRETE PAGE 2 OF 4

2. Coarse Aggregates

a. Coarse aggregates shall be clean, hard, tough, water sound and free of deleterious substances.

b. Maximum aggregate size for reinforced concrete shall not be larger than 1/5 of the narrowest dimension between forms, nor larger than 3/4 of the minimum clear spacing between reinforcing bars or between bars and forms.

c. Maximum aggregate size for unreinforced slabs shall not be larger than 1/3 the slab thickness or 2 inches, whichever is smaller.

C. Mixing Water

1. Use potable water unless approved by Project Engineer.

D. Material Storage

1. Store materials in such a manner as to prevent deterioration or intrusion of foreign matter.

E. Mix Design

1. Contractor shall submit concrete mix design for review prior to beginning concrete work. Unless otherwise noted, all Cast-in-Place concrete shall use a 4,000 psi mix design with 6.5% (+/-1.5%) air content.

2.02 METAL REINFORCEMENT

A. Rebar: Conforming to ASTM A615

B. Welded Wire Fabric: Conform to ASTM A185

2.03 CONTROLLED DENSITY FILL (CDF)

A. Controlled Density Fill shall be a flowable fill or cementitious slurry with a 28-day compressive strength of no less than 300 psi.

PART 3 - EXECUTION

3.01 PLACING CONCRETE

A. Concrete shall not be placed when atmospheric temperature is below 40 degrees Fahrenheit unless authorized in writing by the Project Engineer.

SECTION 03 30 00 – CAST IN PLACE CONCRETE PAGE 3 OF 4

B. Forms shall conform to shapes, lines and dimensions of members as called for on the plans and shall be sufficiently tight to prevent leakage of mortar.

1. Properly brace and tie forms together to maintain position and shape and prevent leakage.

C. Remove water from place of deposit before concrete is placed.

D. Moisten subgrade at the time the concrete is deposited.

E. Deliver and mix Ready-Mixed Concrete in accordance with ASTM C94.

F. Access to the mixing plant shall be provided to the Project Engineer.

G. Tickets indicating time of adding initial mixing water may be required by the

Project Engineer.

H. Place concrete in one continuous operation, once placing is started.

I. Remove supporting forms and shoring after members have acquired sufficient strength to support their weight and imposed loads safely.

J. If concrete placement is authorized for atmospheric temperatures at or below

40 degrees Fahrenheit, concrete temperature shall not be less than 45 degrees Fahrenheit at the time of placement.

1. Heating procedures that alter or prevent the entrainment of the required amount of air in the concrete will not be permitted.

2. Do not heat aggregates and water used for mixing to a temperature exceeding 120 degrees Fahrenheit.

K. Air temperatures surrounding concrete shall be maintained at a temperature of not less than 45 degrees Fahrenheit, nor more than 70 degrees Fahrenheit, for a period of four days.

1. Following the four-day period, the concrete shall be protected from air temperatures below 35 degrees Fahrenheit, for an additional four-day period.

L. Consolidate concrete with vibrators transmitting no less than 5,000 impulses per minute.

M. Chemical or other foreign material shall not be added to the concrete.

SECTION 03 30 00 – CAST IN PLACE CONCRETE PAGE 4 OF 4

3.02 FINISHING

A. Concrete slabwork shall be finished with a smooth troweled surface.

B. The building foundation pad shall incorporate either separately cast, or monolithic footings as detailed in the drawings.

3.03 PLACING CDF

A. At location identified in the drawings as CDF Trench Water Stop, CDF shall be placed around pipes in the trench as detailed in the drawings. CDF shall be tamped or settled to eliminate voids around the pipes.

3.04 FIELD QUALITY CONTROL

A. Concrete shall have a compressive strength of 4000 psi at 28 days.

B. Controlled Density Fill (CDF) shall have a compressive strength of 300 psi at 28 days.

C. The Project Engineer may require slump and compression tests.

SECTION 13 34 23 – FIBERGLASS CONTROL BUILDING PAGE 1 OF 5

SECTION 13 34 23

FIBERGLASS CONTROL BUILDING

A. This section includes furnishing and installing a prefabricated fiberglass building to house pumps, controls and other equipment. The building shall be a complete seamless, monolithically-molded, one-piece fiberglass structure with integral walls and roof.

A. Section 26 60 00 – General Electrical B. Section 40 23 10 – Process Piping

1.03 SUBMITTALS

A. Submit under provisions of Section 01300 - Administrative Requirements.

B. Product Data: Submit manufacturer's data sheets on each product to be used, including, but not limited to, the following:

1. Preparation instructions and recommendations.

2. Storage and handling requirements and recommendations.

3. Installation manual and operating guidelines.

C. Shop Drawings: Manufacturer shall submit the following for review and approval prior to fabrication of the building:

1. Detailed shop drawings of building complete with all accessories supplied by the manufacturer.

2. Detailed shipping, handling and installation instructions.

A. Installations in the United States:

1. Regulatory Requirements: Comply with applicable requirements of the laws, codes, ordinances, and regulations of Federal, State, and local authorities having jurisdiction.

1.05 DELIVERY, STORAGE, AND HANDLING

A. General: Comply with manufacturer's Installation and Operating Guidelines recommendations for delivery, storage, and handling.

1.06 WARRANTY

SECTION 13 34 23 – FIBERGLASS CONTROL BUILDING PAGE 2 OF 5

A. Warranty: The MANUFACTURER shall provide a ten (10) year limited warranty on materials and workmanship. Warranty term shall ensue after OWNER’S acceptance and system startup procedures are complete.

1.07 ENGINEER’S PRE-APPROVAL OF ALTERNATE EQUIPMENT

Manufacturer of alternate equipment shall submit a pre-approval package to Engineer at least ten (10) calendar days prior to bid date. Alternate manufacturer shall submit the following information and supporting documentation:

A. Drawings, specifications, catalog cut-sheets, and detailed descriptive material.

Drawings shall show all relevant details of the building.

B. Product specifications and a detailed description of how each product or component is “equal” to the specified product, system, or component. A side-by-side comparison is required.

C. Detailed installation drawings illustrating how the proposed building fits in the allocated space and how it shall be installed. The drawings shall include plan, elevation, and sectional views of the installation.

D. Equipment/system warranty along with exclusions

E. Performance claims, including, but not limited to: Insulation rating, wind load, and snow load capacities.

F. Reference list of installations of same and similar equipment showing at least 20 installations of the same type as specified.

G. Bill of materials for all equipment, showing dimensions and materials of construction of all components.

H. Manufacturers information, including the number of years the MANUFACTURER has been in business of manufacturing relevant products/systems, PART 2 – PRODUCTS

2.01 MANUFACTURERS:

A. Acceptable Manufacturer:

1. Orenco Composites, Orenco Systems, Inc.; DuraFiber Fiberglass Building

2. Pre-submitted and pre-approved Alternates

Manufacturers requesting to be selected as an approved equal shall submit documentation showing compliance with these specifications a minimum of ten

SECTION 13 34 23 – FIBERGLASS CONTROL BUILDING PAGE 3 OF 5

(10) calendar days prior to bid opening. Selected equipment manufacturers shall be added to the list of approved manufacturers.

Being a named manufacturer in no way assumes automatic compliance with the specification and that the product will be acceptable.

2.02 BUILDING REQUIREMENTS

A. The MANUFACTURER shall furnish a fiberglass building to house controls, filters, and other headworks piping. The building shall be a complete seamless, monolithically-molded, one-piece fiberglass structure with integral walls and roof. Wall thickness shall be no less than 3-inches thick with a minimum insulation value of R18. Walls shall incorporate recessed pockets for 1/2” anchor bolts. Building shall be capable of withstanding 160 mph wind load. The roof shall be capable of handling a 100 psf live load. Fiberglass Building shall be delivered fully assembled and ready to connect to incoming electrical service. Fiberglass building shall be set on a concrete slab per the contract drawings.

Fiberglass Building shall have nominal dimensions of 8-ft in width, 16-ft in length, and 8-ft in height.

B. Materials

1. Fiberglass Building shall be manufactured from fiberglass reinforced polyester resin, using grades of resin and fiberglass considered acceptable for use in water and wastewater environments. Insulation foam shall be a minimum 2 lb/ft3 polyurethane or polyisocyanurate. The inside surface shall be protected with a polyester gelcoat; the outside surface shall be protected with a high performance polyaspartic urethane for continuous outdoor exposure. Unless otherwise approved, the interior color shall be white, exterior color shall be tan. Building shall be free of any wood product.

C. Walls and Ceiling

1. Fiberglass Building shall be a seamless, molded, one-piece unit that is manufactured using a closed-molded RTM or vacuum-infusion process to ensure integral bonding of the foam core with the fiberglass laminates.

Walls and ceiling shall be a minimum 3 inches thick with a minimum insulation value of R18. The fiberglass laminate on either side of the foam core is a minimum of .17 inches. Spay-up type manufacturing process is not acceptable. An integral pocket flange is built into the bottom of the building wall for securing the building to a concrete slab.

D. Doors

SECTION 13 34 23 – FIBERGLASS CONTROL BUILDING PAGE 4 OF 5

1. Fiberglass Building shall be equipped with a fiberglass door. Door width and height dimensions are 48 inches and 80 inches, respectively.

2. Door shall be made with a 2” minimum polyurethane or polyisocyanurate foam core (minimum density of 2 lb/ft3).

3. Door shall be manufactured using a closed-molded RTM or vacuum-bagging process. Spay-up type manufacturing process is not acceptable.

E. Hardware

1. Door shall be hung on 4-inch × 4-inch (100-mm × 100-mm) stainless steel ball bearing hinges with non-removable pins. The hinges are bolted through the door jam with 304 stainless steel fasteners.

2. Door shall be equipped with grade 1 Korbin Ruswin lockset with Rhodes style handle, or equivalent.

3. The framing for the door shall be constructed of fiberglass that is manufactured using a closed-molded RTM or pultrusion process.

4. Door shall be equipped with door closer. Norton 8301H or equivalent.

Door closer shall be a full power range closer and shall have the hold open option.

F. Lift Points

1. Fiberglass Building shall be equipped with lifting brackets or eyebolts installed on the roof exterior to allow lifting of the building by crane, excavator, or similar equipment.

G. Concrete Foundation

1. A cast-in-place concrete foundation pad shall be placed prior to installation of the building. The pad shall incorporate either separately cast, or monolithic footings as detailed in the drawings.

H. Plumbing Vent

1. Fiberglass building shall be equipped with a leak-proof opening in the roof to accommodate a 2” plumbing vent pipe.

2.03 INSTALLED OPTIONS

A. The fiberglass building shall be equipped with the following installed options:

1. Load Center

a. Load Center shall be Eaton with BR series circuit breakers or approved equal.

b. Building manufacturer shall provide panel schedule of control building at time of submittal..

2. Lighting

a. Interior lighting shall be vapor tight fluorescent wrap around, model Lithonia DMW232M or approved equal.

SECTION 13 34 23 – FIBERGLASS CONTROL BUILDING PAGE 5 OF 5

b. Exterior lighting shall be compact fluorescent wall pak, model Lithonia TWS 42TRT 120PE L/LP, photocell or approved equal.

3. Heat, Ventilation and Air Conditioning

a. Heater shall be surface mount, adjustable wattage up to 4.5kW.

With integrated thermostat. Sized appropriately for building, King model SL1215 or King model LP2445. Or approved equal.

b. Ventilation fan shall be an inline centrifugal duct fan, 150 cfm at .2”SP. Model Fantech FR100 or FR150, sized for building. Or approved equal.

c. Intake vent shall be aluminum, in door with insect screen and rain cover. Dayton 5NKLO or approved equal

4. Electrical Outlets

a. Electrical outlets shall be Duplex 125V, 15A with ground fault circuit interruption.

B. All electrical equipment shall be surface mounted. All electrical equipment shall be installed and wired in conformity to the latest edition of the National Electric Code.

C. Additional equipment: the building shall be supplied with a free-standing work bench, having a 24-inch by 72-inch stainless steel working surface, approximately 34 inches in height, and a weight capacity of 500 pounds or greater.

3.01 INSTALLATION

A. All fiberglass building components shall be installed per the MANUFACTURER’S detailed instructions.

B. Building shall be mounted to a concrete foundation pad. Anchors shall not be fully tightened until concrete has cured to design strength.

3.02 SYSTEM COMMISSIONING AND FIELD TESTING

A. The fiberglass building and all installed equipment shall be inspected and tested by the CONTRACTOR prior to system startup.

SECTION 22 11 12 – FACILITY WATER SERVICE PAGE 1 OF 4

SECTION 22 11 12

FACILITY WATER SERVICE

A. This section includes the material and installation requirements for a water service line to serve the control building.

B. Section 22 42 50 – Plumbing Fixtures and Equipment C. Section 31 23 10 – Excavation, Trenching, & Backfill D. Section 40 23 10 – Process Piping

A. AWWA C800 – Underground Service Line Valves and Fittings

B. AWWA C901 – Polyethylene (PE) Pressure Pipe and Tubing, 1/2 Inch through

3 Inch, For Water Service.

1.04 SUBMITTALS

A. Water Service Line B. Fittings C. Curb Stop Valve D. Curb Stop Valve Box

1.05 ACCEPTANCE

A. Work covered by this section will not be accepted until satisfactory backfilling and testing is complete.

2.01 WATER SERVICE LINE AND APPURTENANCES

A. Polyethylene Service Pipe

1. Conform to AWWA C901

2. Minimum Pressure Rating: 200 psi.

SECTION 22 11 12 – FACILITY WATER SERVICE PAGE 2 OF 4

3. 1 inch IPS size PE: SDR 9.

4. Material: High density, ultra high molecular weight polyethylene pipe compound PE-3408 or 3406.

5. Stainless steel stiffeners for compression fittings.

B. Fittings

1. Material: Bronze Alloy

2. Acceptable PE Tubing Fittings:

a. compression type

b. stab type with internal grip-ring and O-ring seal

C. Curb Stops

1. Brass Minneapolis pattern curb stops.

2. IPS polyethylene service line: Mueller H – 15159, A.Y. McDonald 6104 –

33, Ford B66M or equal with conductive compression connections.

D. Curb Boxes with Stationary Rod

1. Cast iron Minneapolis pattern with stationary rod.

2. Mueller H – 10302, A.Y. McDonald 5622 or equal.

3. Curb box lids: Mueller No. 89980, A.Y. McDonald 5623L or equal.

2.02 ACCESSORIES

A. Pentagon Wrenches

1. Suitable for curb box and meter box lid furnished.

2. Equal to Mueller H–10323 or A.Y. McDonald 304K.

B. Combination keys

1. 36 inches long and suitable for the curb stop furnished.

2. Equal to Mueller H-10321 or A.Y. McDonald 304B.

3.01 WATER SERVICE LINE AND APPURTENANCES

A. Install water service line of the size and material indicated on the plans.

SECTION 22 11 12 – FACILITY WATER SERVICE PAGE 3 OF 4

B. Install at the locations shown on the drawings or as directed by the Project Engineer.

C. Refer to Section 31 23 10 for trenching, backfilling, compaction, and separation distances from other utilities.

D. Install service line:

1. From the existing service line to the Control Building.

a. Remove the existing yard hydrant and connect to the existing water service line. Provide fittings as needed to complete the connection.

Coordinate upstream valve closure, or water shutdown with the Project Engineer.

b. Install the new service line to the Control Building. Connect to the Curb Stop valve.

c. Install the Curb Stop valve, located approximately 2 feet outside the foundation perimeter of the control building.

d. Connect the outlet of the Curb Stop valve to the Control Building water stub-out, if available. If no stub-out is available, cap service line at Curb Stop and mark with stake.

2. Bury at depth of 48 inches, minimum.

3. Splices are not allowed in the service line without the written permission of the Project Engineer.

4. Use insert stiffeners with HDPE service line compression fittings.

5. Use insulated couplings when coupling to an existing galvanized steel or iron pipe to copper pipe or other fittings that would cause galvanic corrosion.

3.02 UTILITY CONFLICTS

A. Refer to Section 31 23 10.

3.04 TESTING

A. Turn on upstream valve and apply main pressure to the service line in the presence of the Project Engineer before backfilling.

B. Inspect each joint and fitting for visible leaks.

C. Repair all visible leaks and retest the line until test is successfully completed at no cost to the owner.

3.05 INTERRUPTION OF SERVICE

A. Notify homeowners 24-hours in advance of interrupting their water service.

SECTION 22 11 12 – FACILITY WATER SERVICE PAGE 4 OF 4

B. Do not leave water shut off overnight.

3.06 AS-BUILTS

A. Provide as-built information on each system in accordance with General Requirements.

SECTION 22 42 50 – PLUMBING FIXTURES AND EQUIPMENT PAGE 1 OF 4

SECTION 22 42 50

PLUMBING FIXTURES AND EQUIPMENT

A. This section includes the furnishing and installation of plumbing fixtures, drain piping, and yard hydrant.

B. Section 22 11 12 – Facility Water Service C. Section 31 23 10 – Excavation, Trenching, & Backfill D. Section 40 23 10 – Process Piping

A. Drain Piping

1. ABS Schedule 40 Pipe and Fittings

B. Plumbing Fixtures

1. Interior pipe, Schedule 80 PVC

2. RPZ Backflow Preventer

3. Ball valves

4. Utility Sink

5. Faucet with Eye-Wash Station

6. Frost Free Yard Hydrant

2.01 UTIILTY FAUCET WITH EMERGENCY EYE WASH STATION

A. Eye Wash Station

1. Faucet mount eye wash station.

2. Meets ANSI Z358.1

3. Twin eyewash heads with protective covers and diverter valve

4. Bradley S19-200B or equivalent

B. Utility Faucet

1. 4 inch valve, deck mount

SECTION 22 42 50 – PLUMBING FIXTURES AND EQUIPMENT PAGE 2 OF 4

2. Goose-neck spout

3. Brass body

4. Polished chrome finish

5. Compatible with Eye Wash Station

2.02 DRAIN WASTE VENT PIPING

1. 2-inch Sch 40 ABS Pipe

2. 4-inch Sch 40 ABS Pipe

2.03 WATER SUPPLY PLUMBING

A. Piping material entering building from Curb Stop, exiting building to Yard Hydrant

1. 1-inch IPS PE-3408, SDR 9.

2. Sleeve pipe under the foundation with 4-inch ABS as detailed in the drawings.

B. Piping material inside building

1. 1-inch Sch. 80 PVC pipe.

C. Backflow Preventer

1. 1-inch

2. Reduced Pressure Zone (RPZ) Backflow Preventer Valve

3. Equal to Watts 009 RPZ

D. Ball Valves

1. 1-inch

2. Tru-union

E. Hose bibbs

1. ¾-inch bronze threaded with backflow prevention devices.

2.04 UTILITY SINK

A. Freestanding Utility Sink

1. Fiberglass (FRP) basin

SECTION 22 42 50 – PLUMBING FIXTURES AND EQUIPMENT PAGE 3 OF 4

2. Fiberglass or steel support legs

3. Dimensions 24”L x 20”W x 34”H

4. Bowl Depth 12” Min.

2.05 YARD HYDRANT

A. Frost-free Yard Hydrant

1. 36-inch bury depth, 72-inch overall length

2. Cast iron head, spout, and handle

3. Brass operating valve

4. Galvanized riser pipe

5. Easy valve adjustment above grade

6. Self-draining when handle is closed

7. Woodford Manufacturing Y34-3 or equal

8. Install with at least 1 cubic foot of coarse gravel around the valve weep hole.

2.06 FLOOR TRENCH DRAIN

A. Floor trench drain

1. FRP or similar corrosion resistant construction

2. 4-inch internal width, 144-inch overall length

3. 0.5% internal slope

4. Stainless steel cover grate

5. Central drain connection to 4-inch ABS P-trap

3.01 PIPE AND PLUMBING FIXTURE INSTALLATION

A. Install pipe and plumbing fixtures at the locations shown on the plans.

B. Assemble all piping and fixtures in accordance with manufacturers recommendations.

3.02 PRESSURE TEST PIPE AND PLUMBING FIXTURES

A. Turn on Curb Stop valve and apply main pressure to the interior pipe and fixtures in the presence of the Project Engineer.

B. Inspect each joint and fitting for visible leaks.

C. Repair all visible leaks and retest until test is successfully completed at no cost to the owner.

SECTION 22 42 50 – PLUMBING FIXTURES AND EQUIPMENT PAGE 4 OF 4

3.03 DRAIN PIPING

A. Install drains and piping at locations shown on the plans.

B. Assemble all piping in accordance with manufacturers recommendations

C. Piping from the building shall have a minimum slope of 2%.

3.04 PRESSURE TEST DWV

A. Pressure test all drainage piping installed.

B. Plug all openings

C. Pressurize line to 5 psi.

D. Hold pressure for 15 minutes

a. If pressure holds test passes.

b. If pressure drops, repair pipe and retest.

E. If piping fails the pressure test, repair or replace piping at no cost to the owner.

3.05 WATER SUPPLY LINE INSTALLATION

A. See Section 22 11 12 – Facility Water Service

SECTION 31 05 15 – BASIC SITE SOILS AND AGGREGATES PAGE 1 OF 5

SECTION 31 05 15

BASIC SITE SOILS AND AGGREGATES

A. This section describes the basic soil and aggregate materials for the job and lists their general uses.

A. Section 31 11 00 – Clearing and Grubbing

B. Section 31 23 10 – Excavation, Trenching, and Backfill

A. Supplier and gradation for the following materials:

1. Top Soil

2. Crushed Surfacing Top Course

3. Ballast

4. Quarry Spalls

5. Pipe Embedment

6. Drainage Sand

2.01 Native Materials

A. Top Soil

1. Produced in accordance with WSDOT specification for Topsoil Type B

a. WSDOT reference 9-14.1(2)

2. Organic material overlying the construction site.

3. Used on areas temporarily or permanently stabilized by seeding.

B. Native Fill

SECTION 31 05 15 – BASIC SITE SOILS AND AGGREGATES PAGE 2 OF 5

1. Material generated from construction site excavations

a. General soil types:

(1) Sandy Silt

(2) Silty Clay w/ Sand

2. Used to bring the site to its finished subgrade

3. Not used in the following areas:

a. Fill placed beneath the building and tank.

4. Waste excess native fill in designated “embankment” areas and stabilize, or haul to approved disposal area.

2.02 Imported Materials and Aggregates

A. Top Soil

1. Produced in accordance with WSDOT specification for Topsoil Type C

a. WSDOT reference 9-14.1(3)

2. Organic material imported from a source provided by the Contractor.

3. Used to cover the Drip Drainfield areas and to be permanently stabilized by seeding.

B. Crushed Surfacing Top Course (CSTC)

1. Meets WSDOT Specification 9-03.9(3)

2. Basic Gradation:

Sieve Size

% Passing

3/4” Square 99-100

1/2” Square 80-100

U.S. No. 4 46-66

U.S. No. 40 8-24

U.S. No. 200 10.0 max

3. General Uses

a. Surface stabilization (roads and staging areas)

SECTION 31 05 15 – BASIC SITE SOILS AND AGGREGATES PAGE 3 OF 5

b. Compacted fill beneath major structures (building and tank)

C. Ballast

1. Meets WSDOT Specification 9-03.9(1)

2 ½ ” Square 100

2” Square 65-100

1” Square 50-85

U.S. No. 4 22-100

U.S. No. 40 16 max

U.S. No. 200 9.0 max

a. Fill beneath major structures (building and tank)

b. Soft areas that need additional foundation before receiving native fill

D. Quarry Spalls

1. Meets WSDOT Specification 9-13.6

8” Square 100

3” Square 40 max

¾” Square 10 max

a. Construction entrance

b. Erosion control at water discharge points

SECTION 31 05 15 – BASIC SITE SOILS AND AGGREGATES PAGE 4 OF 5

E. Pipe Embedment

1. Meets WSDOT Specification 9-03.12(3)

1 ½ ” Square 99-100

1” Square 75-100

5/8” Square 50-100

U.S. No. 4 20-80

U.S. No. 40 3-24

U.S. No. 200 10.0 max

a. Fill in the pipe embedment zone

b. Bedding for small structures (ie. manholes and vaults)

F. Drain Rock

1. Meets WSDOT Specification 9-03.12(5)

1 ½ ” Square 100

1” Square 80-100

¾” Square 0-20

3/8” Square 0-2

U.S. No. 200 0-1.5

3. General Uses:

a. Backfill at trench water stop

G. Drainage Sand

1. Meets ASTM C33 with additional gradation requirement

SECTION 31 05 15 – BASIC SITE SOILS AND AGGREGATES PAGE 5 OF 5

3/8” Square 100

U.S. No. 4 95-100

U.S. No. 8 80-100

U.S. No. 16 50-85

U.S. No. 30 25-60

U.S. No. 50 5-30

U.S. No. 100 0-10

U.S. No. 200 0-3*

Pan 0

*No. 200 value must be obtained by washing

a. Drip Drainfield imported fill

PART 3 – EXECUTION

3.01 Crushed Surfacing Top Course (CSTC)

A. Access Road: After completion of final site grading, CSTC shall be spread to provide an access road extending from the access gate to the control building, an approximate length of 140 linear feet. CSTC shall be spread to provide a 12-foot wide driving surface, and a depth of 4-inches. CSTC shall be graded smooth and compacted to 90% of the maximum density.

B. Structural Backfill: CSTC as backfill beneath structures shall be placed as described in Section 31 23 15 – Structural Excavation and Fill

3.02 Imported Top Soil

A. Imported topsoil shall be placed on the drip disposal field as described in

Section 33 34 50 – Drip Drainfield Construction.

3.03 Imported Drainage Sand

A. Imported Drainage Sand shall be placed on the drip disposal field as described in Section 33 34 50 – Drip Drainfield Construction.

3.04 Drain Rock

A. At locations identified for CDF Trench Water Stop, 0.5 cubic yards of Drain

Rock will be placed around pipes, upgradient of the CDF in the trench as shown on the drawings.

SECTION 31 11 00 – CLEARING AND GRUBBING PAGE 1 OF 2

SECTION 31 11 00

CLEARING AND GRUBBING

A. This section describes the clearing, grubbing and other removal of vegetative material requirements.

PART 2 – PRODUCTS (NOT APPLICABLE)

3.01 CLEARING AND GRUBBING

A. Contractor shall clear, grub, and clean up the areas where excavation will occur, and within the project limits.

a. WSDOT reference 2-01.

B. Clear and Grub to limits shown on plans, or as described below:

a. 5 feet on either side of excavated pipe trenches

b. 15 feet from the edge of structural excavation

c. 15 feet from the edge of the drip disposal area.

C. Clearing shall include removing and disposing of all unwanted material from the surface including trees, brush, down timber, and other natural material.

D. Fell trees only within the area to be cleared.

E. Vegetation over the drip disposal area shall be mowed to a height of 6 inches or less, then graded to a depth of approximately 3 inches to remove vegetation and root zone material.

F. Grub shall include removal of all stumps, large roots, buried logs, and other woody material.

G. Old growth stumps may be encountered within clearing and grubbing area. No additional payment will be made for clearing, grubbing and removal of old growth stumps.

3.02 DISPOSAL METHODS

SECTION 31 11 00 – CLEARING AND GRUBBING PAGE 2 OF 2

A. Disposal Method #1: Open Burning

1. Obtain permission and appropriate permits from the Tribe before initiating burning activities.

2. Stack wooden materials in a ventilated pile.

3. Remove soil from stumps prior to placing on the pile.

4. Maintain and monitor the burn pile with a clamshell excavator or similar equipment.

5. Have a water container equipped with a functional water pump available for extinguishing and/or containing fires.

B. Disposal Method #2: The Contractor may elect to haul woody vegetative material to a waste site obtained by the Contractor or at a site explicitly identified by the contract documents.

C. Disposal Method #3: Chipping

1. Chip into pieces no larger than 6 square inches and ½” thickness.

2. Spread chipped wood evenly across the site.

SECTION 31 22 10 – SITE GRADING PAGE 1 OF 1

SECTION 31 22 10

SITE GRADING

A. This section includes rough and finished site grading of all areas disturbed during construction.

A. Section 31 23 10 – Excavation, Trenching and Backfill B. Section 31 25 00 – Erosion and Sediment Control C. Section 32 90 20 – Topsoiling, Seeding, Fertilizing and Mulching

PART 2 – PRODUCTS (Not applicable)

3.01 ROUGH GRADING

A. Grade the area in the vicinity of the excavation to prevent surface water from flowing into the excavation.

B. Excavate and grade a ditch on the uphill side of the drip disposal areas to divert surface water away from the drip disposal areas.

3.02 FINISH GRADING

A. Grade site to true grades and contours as specified on the plans after all structures and piping have been installed.

B. Grade sites for effective drainage away from structures.

C. Dress and trim all slopes.

D. Round off the tops of slopes and toes of slopes.

E. Place topsoil on drip disposal areas and reseed as soon as possible in accordance with Section 32 90 20 – Topsoiling, Seeding, Fertilizing and Mulching.

SECTION 31 23 10 – EXCAVATION, TRENCHING AND BACKFILL PAGE 1 OF 9

SECTION 31 23 10

EXCAVATION, TRENCHING AND BACKFILL

A. This section includes excavation, trenching and backfill necessary for the construction of the facilities as indicated on the plans including, but not limited to sewer force mains, water service lines, site piping, trench water stop drains, and drip supply and return lines.

A. Section 31 22 10 – Site Grading B. Section 31 23 17 – Rock Excavation C. Section 31 25 00 – Erosion And Sediment Control D. Section 33 31 25 – Wastewater Force Main Piping

A. ASTM D698 – Test Methods for Moisture Density Relations of Soils and Soil- Aggregate Mixtures Using 5.5 lb. Rammer and 12-in. Drop [Standard Proctor Test].

B. ASTM D1556 – Test Method for Density of Soil in Place by the Sand-Cone Method

C. ASTM D2216 – Test Method for Laboratory Determination of Water Content of Soil, Rock and Soil-Aggregate Mixtures

D. ASTM D2487 – Classification of Soils for Engineering Purposes [Unified Soil Classification System].

E. ASTM D2774 – Underground Installation of Thermoplastic Pressure Piping F. ASTM D2922 – Test Method for Density of Soil and Soil Aggregate and Rock in Place by Nuclear Methods (Shallow Depth) G. ASTM D3017 – Test Method for Water Content of Soil and Rock in Place by

Nuclear Methods (Shallow Depth) H. OSHA 1926 – Occupational Safety and Health Standards for the Construction

Industry I. Washington DOT – Standard Specifications for Road, Bridge and Municipal

Construction, 2000, English Units

1.04 DEFINITIONS

A. Bedding, Haunching and Initial Backfill zones as defined herein and on the standard thermoplastic pipe trench detailed drawing below.

SECTION 31 23 10 – EXCAVATION, TRENCHING AND BACKFILL PAGE 2 OF 9

B. Native, Import and Select Material Definitions:

1. Native Material: Soils excavated from the trench in the immediate vicinity of current pipe installation activities.

2. Import Material: Soils transported from a soil pit stockpile at a location other than the location where trench excavation is taking place.

C. Soil Materials as summarized in the table below and further defined in ASTM D2487:

USCS Group Description

GW Well-Graded Gravel, with less than 5% fines

GP Poorly-Graded Gravel, with less than 5% fines

SW Well-Graded Sands, with less than 5% fines

SP Poorly-Graded Sands, with less than 5% fines

GW-GM or GW-GC Well-Graded Gravel, with 5-12% fines

GP-GM or GP-GC Poorly-Graded Gravel, with 5-12% fines

SW-SM or SW-SC Well Graded Sands with 5-12% fines

SP-SM or SP-SC Poorly Graded Sands with 5-12% fines

1.05 SUBMITTALS

A. Submit the result of standard proctors, including proctor curve, for each soil type encountered and used on the job.

B. Submit all compaction test results in writing within 5 days of being performed.

1.06 QUALITY ASSURANCE

SECTION 31 23 10 – EXCAVATION, TRENCHING AND BACKFILL PAGE 3 OF 9

A. Compaction Testing Qualifications: Tests must be performed by a firm or professional regularly engaged in soil testing for engineering purposes. The individual on site shall be certified to operate nuclear density equipment.

B. Locations: Provide compaction test results at locations as designated by the

Project Engineer.

1. Frequency:

a. Excavation, Trenching and Backfilling outside of an Established, Traveled Roadway: once per 1000-feet along the pipeline.

2. At locations where structures, roadway shoulders, or driveways will be constructed or reconstructed over the trench, the backfill shall be spread in layers and be compacted by mechanical tampers. In such cases, the backfill material shall be placed in successive layers not exceeding 6 inches in loose thickness, and each layer shall be compacted with mechanical tampers to the density specified herein. Mechanical tampers shall be of the impact type as approved by the Engineer.

3. At each location, provide enough tests to demonstrate compliance with the compaction requirements for both the pipe embedment zone and the final backfill zone.

4. If testing reveals inadequate compaction, retest at that location after remedying the non-compliance with the specifications.

2.01 BEDDING, HAUNCHING AND INITIAL BACKFILL MATERIAL

A. Imported Bedding, Haunching and Initial Backfill Materials: Use one of the following materials.

1. Crushed, processed or naturally occurring aggregates that meet

Washington DOT specification 9.03.12(3), “Gravel Backfill for Pipe Zone Bedding”:

2. USCS (ASTM D2487) soil types GP, GW, SP, SW (coarse grained soils with less than 5% fines) and GP-GM, GP-GC, GW-GM, GW-GC, SP-SM, SP-SC, SW-SM, SW-SC, with maximum particle sizes limited to 1-inch, utilized as stipulated in Part 3 - Execution.

B. Native bedding, native haunching and native initial backfill material:

SECTION 31 23 10 – EXCAVATION, TRENCHING AND BACKFILL PAGE 4 OF 9

1. Use in accordance with the restrictions of Part 3 – Execution.

2. Free from particles greater than 1-inch in dimension.

2.02 FINAL BACKFILL MATERIAL

A. General:

1. Free from soil chunks larger than 4-inches in dimension.

2. Free from stones or rocks larger than 4-inches in dimension.

3. Free from organic materials.

4. Free from frost chunks.

B. Imported Final Backfill for Wet Conditions:

1. Types GW, GP, SW, SP (coarse grained soils with less than 5% fines) or

GW-GC/GM, GP-GC/GM, SW-SC/SM, SP-SC/SM (coarse grained soils with 5-12% fines).

2. Otherwise meeting the general requirements of Article 2.02 Paragraph A.

3.01 GENERAL

A. Conform to applicable safety laws, including, but not limited to, OSHA 29 CFR Part 1926.

B. Obtain all permits from the appropriate road agencies for construction within road right of way.

C. Repair damage resulting from settlement, slides, cave-ins, water pressure, and other causes.

D. Provide traffic control and other temporary provisions as needed.

3.02 EXCAVATION

A. Remove brush, trees and stumps from excavation and site.

B. Strip and stockpile existing topsoil.

C. Maintain surface drainage away from trenching or excavation.

D. If existing soil cannot provide uniform and stable bearing support along the length of the pipe, or if the existing soil contains stones greater than 1-inch in dimension, then over-excavate 4-inches below bottom of pipe.

3.03 TRENCHING

SECTION 31 23 10 – EXCAVATION, TRENCHING AND BACKFILL PAGE 5 OF 9

A. Total Bottom Width:

1. Minimum: Pipe diameter plus 8-inches.

2. Maximum: Pipe diameter plus 12-inches.

3. Multiple lines in a common trench shall be installed as detailed in the project drawings.

B. Depth: Provide minimum cover as specified, or depths shown on plans.

C. Top Width: As needed to meet safety requirements, but minimize the width where possible.

D. Trench Walls: Keep trench walls vertical in the pipe embedment zone.

E. Length of Open Trench:

1. Unless authorized by the Project Engineer in writing, the length of trench excavation in advance of pipe being laid shall not exceed 300-feet during active construction.

2. All trenches must be backfilled during non-work hours, or alternately, up to

20-feet of trench can be left open during non-work hours if the trench is completely barricaded and fenced.

3. If open trenches in excess of this specification result in the wetting of moisture-sensitive stockpiled materials, such that the moisture content makes it impossible to meet compaction requirements, the contractor shall provide imported material that complies with these specifications and haul away the wet materials at no expense to the project or the Owner.

3.04 BEDDING

1. Where over excavation is necessary, install 4-inches of Imported Bedding.

2. Level and form the bottom of the trench to provide uniform bearing support along the length of the pipe.

B. Compaction of Imported Bedding: Meet the following density requirements based on standard proctor (ASTM D698):

Location

Percent of Max.Dry Density Required

SECTION 31 23 10 – EXCAVATION, TRENCHING AND BACKFILL PAGE 6 OF 9

Areas of Recent Fill or Embankment 95%

Areas Traveled By Vehicular Traffic, Rights-of-Way 90%

Unimproved Surfaces or Fields 80%

3.05 HAUNCHING AND INITIAL BACKFILL

A. General

1. Provide complete and uniform bearing and support for the pipe, including allowance for bell holes.

2. Work material under the pipe haunches and around the pipe to ensure full pipe support.

3. Place material in lifts no greater than 6-inches thickness in loose measure.

4. Install initial backfill to a depth of 6-inches over the crown of the pipe.

B. Material Usage:

1. Plastic Pipe: Imported Material

C. Compaction of Haunching and Initial Backfill:

1. Compact haunching material and initial backfill using walk-behind vibratory plate compactor or manual hand-tamping tools

2. Ensure no contact between compacting equipment and the pipe.

3. Prohibited Compaction Equipment for Haunching and Initial Backfill:

a. hoe-pack

b. hydrohammer

c. rammer-tamper

d. vibratory rollers

4. Prevent movement of the pipe during placement or compaction of material.

5. Meet the following density requirements based on standard proctor (ASTM D698):

Location

Percent of Max. Dry Density Required

Areas of Recent Fill or Embankment 95%

Areas Traveled By Vehicular Traffic, Rights-of-Way 90%

Unimproved Surfaces or Fields 80%

SECTION 31 23 10 – EXCAVATION, TRENCHING AND BACKFILL PAGE 7 OF 9

3.06 FINAL BACKFILL

1. If moisture content of the native soil results in the inability to meet compaction requirements (due to fines), use imported material that meets Article 2.02 B.

2. Waste or haul away material not meeting the requirements.

3. Repair any trenches improperly backfilled or where settlement occurs, then refill and compact.

B. Compaction:

1. Install 2-feet of total fill over the pipe crown before subjecting the trench to hydrohammers, hoe-packs, or vehicular traffic.

2. Backfill in lifts to meet compaction requirements throughout the full depth of backfilled trench.

3. Compact to the following requirements (Densities as a percent of Standard Proctor):

Location Maximum Lift

Percent of Max. Dry Density Required

Under Roadways or Surfaces Traveled by Vehicular Traffic 12-inches 95%

Areas of Recent Fill or Embankment 12-inches 90%

Rights-of-Way 12-inches 90%

Unimproved Surfaces or Fields 24-inches 70%

4. Use smaller lifts if necessary to meet the in-place density requirements.

3.07 REMOVAL OF NUISANCE WATER

A. Control site drainage, springs and runoff, and prevent water from adversely affecting trenching locations.

B. Remove nuisance water entering the trenches. Water that can be removed through the use of sump or trash pumps will not be considered dewatering.

SECTION 31 23 10 – EXCAVATION, TRENCHING AND BACKFILL PAGE 8 OF 9

C. Keep trenches free from standing water until the facilities are in place, the end plugged against the entrance of water, and backfill has been placed and compacted.

3.08 LOCATE EXISTING UTILITIES

A. Field locate all existing underground utilities.

1. Utilize state “utility locate” hotlines.

2. Contact all other utility owners not covered by the state “Utility Locate” hotlines.

B. Contact tribal water and sewer officials 48-hours in advance of work in areas needing utility location service.

3.09 UTILITY CONFLICTS

A. Protect existing utilities from damage during excavation and backfilling operations.

B. Provide temporary support for existing water, gas, telephone, power, or other utility services that cross the trench until backfilling of trench is complete.

1. Compact backfill to 95% of maximum density under disturbed utilities.

2. Coordinate the repair of existing utilities, regardless of whether they were properly located.

a. Damage to existing utilities properly located through “Utility Locate” programs will be the responsibility of the Contractor to repair, at no cost to the Owner or Government.

b. Damage to existing utilities improperly located by “Utility Locate” programs shall be at the expense of the “Utility Locate” service or the owner of the damaged utilities.

c. Fair compensation will be negotiated for repairs to tribal water and sewer utilities that were improperly located. However, if the Contractor neglects to request a Tribal utility locate in accordance with the Contract requirements, no compensation will be made to the Contractor.

C. Water and sewer parallel and perpendicular crossings:

1. Maintain a 10-foot horizontal separation (O.D. to O.D.) for parallel mains.

SECTION 31 23 10 – EXCAVATION, TRENCHING AND BACKFILL PAGE 9 OF 9

2. Upon approval by the Engineer, water and sewer mains may be installed in parallel as close as 5-feet, provided all of the following conditions:

a. Vertical separation is 18 inches (O.D. to O.D.)

b. Water main is above the sewer main.

c. Sewer pipe is constructed to withstand 150 psi static pressure without leaking.

3. Maintain a minimum 18-inch vertical separation (O.D. to O.D.) for perpendicularly crossing mains.

a. Place water pipe over sewer pipe.

b. Lay pipe with joints equidistant from the point of crossing.

4. If it is impossible to meet any of the above separation distances and deviations, and specific provisions are not indicated on the plans, bring the matter to the attention of the Project Engineer for resolution.

SECTION 31 23 15 – STRUCTURAL EXCAVATION AND FILL PAGE 1 OF 5

SECTION 31 23 15

STRUCTURAL EXCAVATION AND FILL

A. This section addresses the material requirements and requirements for excavation, placement of materials, and compaction for structures.

B. This section addresses excavation and structural fill for tanks, utility vaults, footings and other structures, structure removal, and exploratory excavation.

1.02 REFERENCES

A. ASTM C136 – Method for Sieve Analysis of Fine and Coarse Aggregates

B. ASTM D698 – Test Method for Laboratory Compaction Characteristics of Soil

Using Standard Effort (12,400 ft-lbf / ft3)

C. ASTM D1556 – Test Method for Density of Soil in Place by the Sand-Cone

Method

D. ASTM D2216 – Test Method for Laboratory Determination of Water Content of

Soil, Rock and Soil-Aggregate Mixtures

E. ASTM D2922 – Test Method for Density of Soil and Soil Aggregate and Rock in Place by Nuclear Methods (Shallow Depth)

F. ASTM D3017 – Test Method for Water Content of Soil and Rock in Place by

Nuclear Methods (Shallow Depth)

G. Washington Department of Transportation Standard Specifications for Road, Bridge, and Municipal Construction: 2000 Edition, English Units

1.03 SUBMITTALS

A. 13 lb Sample and gradation of imported fill materials.

B. Proctor curve with maximum density and optimum moisture content indicated.

C. Field density and moisture test results.

SECTION 31 23 15 – STRUCTURAL EXCAVATION AND FILL PAGE 2 OF 5

1.04 DEFINITIONS

A. Structural Excavation: Excavation for structures including, but not limited to;

foundations, tanks, footings, and slabs. Structural excavation is exclusive of trench excavation.

B. Structural Fill: Fill underneath structures including, but not limited to;

foundations, tanks, footings, and slabs.

2.01 STRUCTURAL FILL

A. Crushed Material meeting WSDOT 9-03.9(3)

Percent Passing (by weight) Sieve Size Base Course Material Top Course Material 1¼ “ Square 100 --- 5/8” Square 50 – 80 100 ¼“ Square 30 – 50 55 – 75 U.S. No. 40 3 – 18 8 – 24 U.S. No. 200 0 – 7.5 0 – 10 Percent Fracture 75 minimum 75 minimum

B. “Ballast” meeting WSDOT 9-03.9(1)

Sieve Size Percent Passing 2 ½“ Square 99 – 100 2” Square 65 – 100 1” Square 50 – 85 U.S. No. 4 26 – 44 U.S. No. 40 16 max U.S. No. 200 9.0 max Sand Equivalent 35 min

3.01 PREPARATION

A. Identify required lines, levels, contours, and datum.

B. Locate, identify, and protect utilities that remain, from damage.

C. Notify utility company to remove and relocate utilities.

D. Protect benchmarks, existing structures, and fences, from excavation equipment and vehicular traffic.

SECTION 31 23 15 – STRUCTURAL EXCAVATION AND FILL PAGE 3 OF 5

E. Verify fill materials to be used are acceptable.

F. Dewater as necessary.

G. Compact subgrade to density requirements for subsequent backfill materials.

Scarify, wet and recompact, if necessary, to achieve densities.

H. Cut out soft areas of subgrade not capable of insitu compaction. Backfill with Ballast as necessary and compact to density equal to or greater than requirements for subsequent backfill material.

I. Prior to placement of any fill material, compact subgrade to 95% of its maximum dry density.

J. Strip and stockpile topsoil and/or organic material.

K. Notify the engineer of any unanticipated soil conditions that might compromise the support for the proposed structure.

L. The site contains abandoned structures, pipes, and appurtenances that may or may not be shown on the plans. Excavation and removal of abandoned facilities shall be incidental to other work. Notify the engineer of any unanticipated abandoned facilities that might compromise the support for the proposed structure.

3.02 EXCAVATION FOR STRUCTURE

A. Description.

1. Provide excavation and disposal of all materials required for the construction of structures and unless otherwise specified include all necessary drainage, pumping, bailing, sheeting, shoring; the construction of cribs and cofferdams and their subsequent removal; removing old structures or parts thereof as required.

B. Construction Requirements

1. Remove unstable foundation material as directed below the designed elevation. Use suitable surplus excavated material in the construction of embankments, and unsuitable material will be wasted.

2. Excavate 6-inches deeper than the bottom of the proposed structure, unless the plans indicate a specific structural fill thickness.

3. Where rock, boulders, or other unyielding material is encountered, and meets the definition of Rock Excavation, remove the unyielding material in accordance with Section 31 23 17 Rock Excavation. Rock Excavation will be measured separately.

4. Grade top perimeter of excavation to prevent surface water from draining into excavation

SECTION 31 23 15 – STRUCTURAL EXCAVATION AND FILL PAGE 4 OF 5

5. All other backfill shall consist of materials described in Part 2 of this section uniformly distributed in layers of not more than 8 inches and compacted to the required density before successive layers are placed.

6. Where the structure is to rest on material other than rock or boulders, take special care not to destroy the bearing value of the foundation material.

7. Notify Engineer of unexpected subsurface conditions and discontinue affected work in area until notified to resume work. Proceed with unaffected work.

8. Correct areas over-excavated by error in accordance with Structural Fill as identified in this section, at no cost to the Owner.

9. Excess and unsuitable fill material shall be hauled to an off-site disposal area to be secured by the Contractor.

3.03 BACKFILL FOR STRUCTURES

A. Description: Compacting backfill includes the work of placing backfill material, compacting, sloping and cleaning up the sites. Replace material removed below design elevation with approved material

B. Provide a minimum of 6-inches of imported structural fill underneath structures, unless otherwise indicated on the plans.

C. Within 3-inches of the structure, use 1¼-inch minus material or smaller.

D. When filling alongside structures, exercise care to protect the structure, and cease use of vibratory or power compaction equipment if necessary to protect the integrity of the structure.

E. Required Densities:

1. Top 2-feet of Fill: 95% of Maximum Density

2. Below the Top 2-feet of Fill: 90% of the Maximum Density

E. Moisture Content Limitations:

1. Maximum: 3% in excess of the optimum determined by laboratory moisture-density tests (i.e. proctor tests), unless the material is free draining gravel or sand with less than 5% fines (passing No. 200 sieve) or if the moisture will not impair the embankment’s integrity and soil density.

2. Minimum: As necessary to meet the required density.

3. Moistening, drying or protecting the moisture content shall be incidental to the work, and the cost of such activity shall be included in the bids.

SECTION 31 23 15 – STRUCTURAL EXCAVATION AND FILL PAGE 5 OF 5

3.04 REMOVAL OF STRUCTURES

A. Description: Removal of structures includes the work of excavating, removing, hauling, and disposing of existing structures as identified in the project drawings.

B. Existing septic tanks shall be pumped out by a certified septic pumper prior to…