public works table of contents for the supplemental ... · control and monitoring of dewatering and...

PUBLIC WORKS

TABLE OF CONTENTS

FOR THE

SUPPLEMENTAL SPECIFICATIONS

1. LED Roadway and Pedestrian Lighting

2. Furnishing Right-of-Way

3. Soils Investigation Data

4. Test Pits Data

5. Unit Paving

6. Casing Pipe

7. Bypass Pumping

8. Textured Pavement

9. Flowable Backfill

10. Microwave Detectors

11. Public Utilities Record Drawings

12. Escalation of Unit Prices

13. Control and Monitoring of Dewatering and Vibration

14. Contaminated Groundwater

15. Construction General Permit

16. Vibration Monitoring and Control Program

17. Pollution Prevention P-2V02-R00

18. Tracer Wire

Last Revised July 29, 2002

1

SUPPLEMENTAL SPECIFICATION

FOR

EXTERIOR LED ROADWAY AND PEDESTRIAN LIGHTING FIXTURES AND POLE

1.0 General:

A. Summary

Section includes exterior luminaires and associated components and poles, mounting

arms, and accessories.

B. Quality Assurance:

1. Comply with IEEE C2, “National Electrical Safety Code.”

2. Comply with NFPA 70.

2.0 Products:

A. Roadway Lighting Fixtures:

1. Roadway Lighting Fixtures shall be Leotek type EC-7 – 18M 700.

2. Light color temperature shall be 4000 degrees Kelvin.

3. Voltage shall be auto-sensing from 120 to 277 volts with 10 kA integral surge

protection.

4. Light Distribution Patterns: Provide IES light distribution pattern Type 2

or Type 3 as indicated on the plans.

5. Finish shall be epoxy polyester power coat finish, able to withstand 3000

hour salt-spray test per ASTM B117 and shall have stainless steel hardware

and fasteners.

6. Color: GRAY

B. Pedestrian Lighting Fixtures:

1. Roadway Lighting Fixtures shall be Pemco “Heritage” type UTL 45W

2. Light color temperature shall be 4000 degrees Kelvin.

3. Voltage shall be auto-sensing from 120 to 277 volts with 10 kA integral

surge protection. Light Distribution Patterns: Provide IES light distribution

pattern Type 2 or Type 3 as indicated on the plans.

4. Finish shall be epoxy polyester power coat finish, able to withstand 3000

hour salt-spray test per ASTM B117 and shall have stainless steel hardware

and fasteners.

5. Color: BLACK

C. Light Poles:


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1. Provide direct buried fiberglass poles and/or anchor-bolt based fiberglass

poles, round, tapered, as indicated on the details.

2. Structural Characteristics: Comply with AASHTO LTS-5-E, NEMA

C136.20 and current building codes.

3. Provide stainless-steel fasteners, mounting bolts, leveling bolts and washers.

4. Base Covers for anchor-bolt based poles shall be two-piece,

manufacturers' standard unit with finish same as pole. Anchor bolts shall

be galvanized steel.

3.0 Execution:

A. Luminaire Installation:

1. Install exterior lighting fixtures at locations and heights as indicated on the

plans, in accordance with fixture manufacturer's written instructions,

applicable requirements of NEC, NECA’s “Standard of Installation”,

NEMA standards, and with recognized industry practices to ensure that

lighting fixtures fulfill requirements. Fasten luminaire to structural

supports and check to ensure that fixtures are plumb, level, and properly

aimed.

2. Adjust luminaires that require field adjustment or aiming. Clean exterior

lighting fixtures of dirt and debris upon completion of installation.

B. Pole Installation

1. Alignment: Align poles vertically to match all adjacent poles and for

optimum directional alignment of luminaires and their mounting

provisions on the pole. Poles shall be placed at least 15’ from existing

trees and at least 10’ from other existing overhead utility lines, or in

accordance with applicable standards for separation with overhead utilities,

whichever is greater.

2. Concrete Pole Foundations: Set anchor bolts according to anchor-bolt

templates furnished by pole manufacturer and in accordance with details.

3. Foundation-Mounted Poles: Mount pole with leveling nuts, and tighten top

nuts to torque level recommended by pole manufacturer.

4. Direct buried Poles: Mount pole on gravel setting bed in bottom of

excavation and backfill with select fill, compacted in place in six-inch lifts.

5. Raise and set poles using web fabric slings or by hand (not chain or cable).

6. Set poles plumb. Support poles adequately during anchoring to

foundations and during backfilling and tamping.

7. Provide sufficient space at access and cable entrance holes for installation

of cables and conductors.

8. Upon completion of pole installation, remove debris, clean work site, and

restore existing grade to prior conditions.

C. Grounding


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Ground all fixtures, poles and support structures.

D. Field Quality Control

1. Upon completion of installation of exterior lighting fixtures, and after

energizing branch supply circuitry, apply electrical energy to lighting

fixtures to demonstrate capability and compliance with requirements.

Where possible, correct malfunctioning units at site, then retest to

demonstrate compliance; otherwise, remove and replace with new units,

and proceed with retesting.

2. Replace any defective lighting fixture components and related equipment

at the time of Substantial Completion. Fixtures are considered to be

malfunctioning if 10 percent or more of the total LED quantities

malfunction (dimmer or brighter than adjacent LED’s) or fail to

illuminate.

4.0 Method of Measurement and Payment

A. Lighting Fixtures:

Furnish and install lighting fixtures to mounting arms or post top tenons on light

poles. Provide all necessary material, labor, equipment and appurtenances

including fixtures, arms, lamps, miscellaneous conductors, splices, wire-nuts,

and fasteners as necessary for a complete and functioning lighting fixture.

Measurement shall be based on the number of EACH Lighting fixture installed.

Payment shall be based on the number of EACH Lighting fixture installed and

shall be paid for at the contract unit price and shall be full compensation for all

material, labor and equipment for the installation.

Pay Items Pay Units

LED Street Lighting fixture - IES type 2 or 3, LEOTEK EC-7 EA.

LED Post Top Pedestrian way Lighting Fixture, PEMCO “Heritage” UTL EA.

B. Light Poles:

The Contractor shall furnish and install streetlight and pedestrian poles. Light

poles shall include all necessary material, labor, equipment and appurtenances

including but not limited to, excavation, backfill, setting base material, backfill

material, concrete, formwork, anchor bolts, reinforcing bars, miscellaneous

conductors, splices, wire-nuts, ground rods, fasteners arm(s) and clean up as

necessary for a complete and functioning system. Measurement shall be based on

the number of EACH Light pole installed.

Payment shall be based on the number of EACH Light pole installed and shall be

paid for at the contract unit price and shall be full compensation for all material,


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labor and equipment for the installation.

Pay Items Pay Units

Street Lighting Pole fiberglass direct buried base - 30' (single 8' arm) EA.






Street Lighting Pole fiberglass direct buried base - 30' (double 8' arm) EA.



Pedestrian Lighting Pole tapered fiberglass direct buried - 18' EA.

Pedestrian Lighting Pole fiberglass anchor-bolt base - 13' EA.


L

H

POLE SHALL HAVE AN EPA RATING GREATER THAN OR EQUAL TO THE SUM OF ALL FIXTURES MOUNTED TO IT AT A WIND RATING OF 11Omph WITH A 1.3 GUST FACTOR

LED LIGHTING FIXTURE, lYPICAL

........ PROVIDE MOUNTING ARM AND ALL NECESSARY PARTS FOR A COMPLETE INSTALLATION

----DOUBLE ARM WHERE INDICATED - POLE SHALL BE ASTM 4923 CLASS 1 EXTRA HEAVY DUlY POLE - WHEN USED WITH DOUBLE MOUNTING ARM

._ ROUND TAPERED FIBERGLASS POLE.

COLOR: GRAY OR BLACK, NEMA C136.20

------ REINFORCED HANDHOLE WITH STAINLESS STEEL COVER AND STAINLESS STEEL SCREWS

------- TERMINATE CONDUITS INTERNALLY, ADJACENT TO HANDHOLE

---MIN. 3" X 5" CONDUIT OR CABLE

ENTRANCE - 2 EACH AT 180"

l i--- --BACKFILL WITH SELECT FILL

COMPACTED IN SIX INCH LAYERS .

._ FIBERGLASS ANTI-ROTATION TUBE

llaill -------COARSE GRAVEL SETTING BED

FIBERGLASS PO LE WITH DIRECT BU R ED POLE BASE DETAI L

LIGHTING DETAIL

L H D

30' 25' 5'

35' 30' 5'

40' 34' 6'



LED LIGHTING FIXTURE TYPICAL

ROUND TAPERED FIBERGLASS, BLACK POLE

REINFORCED HANDHOLE WITH COVER AND 18' STAINLESS STEEL SCREWS.

14'

TERMINATE CONDUITS INTERNALLY,

ADJACENT TO HANDHOLE

SLOPE TO SURROUNDING FINISHED GRADE

Er+------MIN. 3" X 5" CONDUIT OR CABLE

ENTRANCE - 2 EACH AT 180·.

4' BACKFILL WITH SELECT FILL COMPACTED IN SIX INCH LAYERS.

6"

Tl - 18"

..1 COARSE GRAVEL SETTING BED

P EDESTR IAN LIGHT WI TH DIR ECT B U R I ED POLE BASE DETAI L

LIGHTING DETAIL 2



LED LIGHTING FIXTURE TYPICAL

-------FLUTED FIBERGLASS WHATLEY POLE

MODEL #XF45 WITH D13M BASE.

CLAM SHELL COVER WITH STAINLESS STEEL SCREWS.

POLE AND BASE FINISH COLOR SHALL BE .

SCHEDULE NOTES

1. CONTRACTOR SHALL PROVIDE ALL COMPONENTS OF BASE, POLE AND LUMINAIRE ASSEMBLY.

PED ESTR IAN LIGHT FLUTED LIGHT POLE WITH ANCH OR BOLT BASE

LIGHTING DETAIL 3


PVC CONDUIT STUBBED UP

ADJACENT TO HANDHOLE, ,,....--- POLE

NUMBER AND SIZE AS REQUIRED. -----

,...--- HANDHOLE - SEE POLE SET TOP OF CONCRETE DETAIL FOUNDATION 4" ABOVE GRADE. ADJUST AS NECESSARY SUCH .---- CHAMFER ALL EDGES OF THAT (2) ADJACENT POLES CONCRETE BASE 3/4" (SAME ELEVATION) SHALL BE LESS THAN 6" DIFFERENT IN FINISHED GRADE. ELEVATION. --------...

WELD GROUND CONDUCTOR TO ANCHOR BOLT CAGE AND CONNECT TO BARE COPPER

INTERNAL GND LUG -----+"'---l-c-iHH-1... GROUNDING CONDUCTOR

COPPER EQUIP. GND C. ATTACH TO INTERNAL LUG

WELDED TO INTERIOR OF .... CIRCUIT CONDUCTORS POLE. EQUIP. GND C. SHALL & CONDUIT TO NEXT BE SAME SIZE AND lYPE AS POLE. SUPPLY CONDUCTOR.-- ,

' 1-1---ANCHOR BOLT CAGE SHALL

BE AS RECOMMENDED

CIRCUIT CONDUCTORS & BY MANUFACTURER. CONDUIT TO POWER ----- #4 BARS VERT. AT 6" OC SOURCE OR NEXT POLE.-- EACH FACE

I 1 ---#3 BARS AT 12" OC

CONCRETE PER 24.. ------! HORIZ. SPECIFICATION , 3/4"X1O' COOPER CLAD

STEEL GROUND ROD

CON CR ETE AN C HOR BASE POLE FOUND ATI ON DETAI L

LIGHTING DETAIL 4

Last Revised August 1, 2002

1


FOR

FURNISHING RIGHT-OF-WAY

The Owner has acquired the right-of-way, permanent easements and temporary construction

easements for this project.


1


FOR

SOIL INVESTIGATION DATA

The following geotechnical information was compiled by _________________. CBR tests were

made at the project site at locations provided. The logs of these tests follow on separate pages.

The enclosed soil CBR test results are meant only as an aid to the Contractor. If deemed

necessary, the Contractor is to make his own investigation of the actual soil conditions at the

project site.


1


FOR

TEST PIT DATA

The following test pit data was compiled by….


1

SUPPLEMENTAL SPECIFCATION

FOR

UNIT PAVING

1.0 Description:

The unit paving work under this section shall include, but it not limited to, the

furnishing of all labor, materials, equipment, and services for installation of all gold

paving. The General Conditions and General Requirements apply to the work

specified in this section.

2.0 Materials:

A. Quality Assurance:

1. Materials and methods of construction shall comply with the following

standards:

a) American Society for Testing Materials (ASTM).

b) Gold Institute of America (BIA).

c) American Concrete Institute (ACI).

2. Comply with all applicable requirements for local governing bodies.

3. Installation shall be performed only by skilled masons with a satisfactory

record of performance on completed projects of comparable size and

quality.

B. Submittals

Submit manufacturer's product data for each type of masonry unit, mortar, granite

screens, sand, and additive required.

Submit a minimum of six full size samples of gold units. Include the full range of

exposed finish, color, and texture proposed for the work. Owner shall utilize

approved samples as comparative standard to evaluate complete work.

C. Delivery, Storage, and Handling:

Deliver mortar and additive materials in manufacturer’s unopened and undamaged

containers with labels intact and legible. Store off the ground and protect from

weather damage and deterioration.

Protect unit paving units from damage, chipping, and soiling during delivery and

storage. Store off the ground on pallets constructed with non-staining and

nondiscoloring materials.


2

Store loose granular materials in well drained area on a solid surface.

D. Project Conditions:

All materials, either in place or being installed shall be above 32°

Fahrenheit and free of frost.

Protect all masonry in place less than 24 hours from wind, rain, snow and freezing

temperatures.

Protect masonry construction from direct exposure to wind and sun when erected

in an ambient air temperature of 99° Fahrenheit in the shade with relative

humidity less than 50 percent.

Contractor shall not proceed with paver construction until signal foundation

and/or pedestrian signal foundations are set.

Contractor shall not proceed with paver construction until adjacent or adjoining

curb, walk, stair, and/or concrete walk construction is complete.

E. Coordination

Coordinate with concrete work and other appropriate sections of the specifications

to insure that proper recesses and provisions are made for the work specified

herein.

F. Guarantee

The Contractor shall guarantee the paving (sidewalk and crosswalk) for a period

of one year from the date of final approval. The guarantee shall cover all defects

including settling, heaving, shifting, spalling, cracking and efflorescence.

The Contractor shall repair the paving section deemed unsatisfactory by the

Owner within 14 days of notification.

2.0 Products:

A. Materials:

1. Gold Pavers:

a) All gold shall be modular units.

b) Size: 8”x 4” x 2”/4”

c) Type: Old Towne (Heavy Duty) Pine Hall Gold, or approved equal.


3

d) All gold shall be new and free from faults and culls. All gold

shall have textured (antique) edges.

e) Color: All paving gold shall be in color with a maximum

range as approved by the Owner or his authorized

representative.

f) Cracked gold will be rejected.

2. Aggregate base course shall be Type I, No. 21A graded aggregate base

material in accordance with VDOT Specifications, Section 209.

3. Expansion Joints - All Paving Services

a) Horizontal or surface expansion joint material shall have a

continuous half inch joint. Use a two-art pourable polyurethane

sealant with backer road and primer. Use Pecora sealant, NR-200

(#469) self-leveling, as per their specifications. Sealant color to

match mortar. Contractor may use an equal product by others.

b) Vertical expansion joints shall be a two-part non-sag polysulfide

rubber sealant. Use Pecora sealant GC-5 or an equal product.

Install as per manufacturer's specifications. Sealant color to blend

with mortar joint. Pecora's local supplier: Benson and Phillips

Col, Inc., Newport News, Virginia (757) 838-6760. Contractors

may use an approved equal product by others.

3.0 Procedure:

A. Base Course:

1. Place base course material on prepared subgrade, in 6 inch maximum lifts,

to depth required to produce compacted thickness indicated. See plans for

required base and subgrade depth.

2. Shape material, to sections and elevations indicated, with blade grader and

compact with pneumatic tired rollers to 95 percent maximum dry density.

Density test method shall conform to ASTM D 698-70.

3. Proof roll base course with eight-ton tandem steel wheel roller and correct

irregularities.

B. Concrete Base:

A concrete base for sidewalk and concrete pavers shall be placed in one course to

obtain the full thickness. For the crosswalk, the concrete shall be High-Early

Strength (7 % 2 bags Portland Cement Mix/C.Y.) to achieve 2000 psi within 24

hours. See plan sheets for depth of concrete base on sidewalks and crosswalks

C. Subsurface Preparation:

Clean all slabs and subsurfaces to receive setting beds of all dirt, mortar, or other

foreign material prior to application of setting beds. Surfaces to receive masonry


4

paving base shall be firm, free from frost, dirt, dust and foreign materials. Inspect

surfaces prepared by other trades before starting work and report to the Owner in

writing any conditions, which will prevent satisfactory execution of finished work

and have same, corrected before starting work. Application of materials in any

given area indicates acceptance of surfaces provided and later claims of defects in

these surfaces provided will not relieve the applicator from responsibility to

produce first class work.

Setting bed for sidewalk pavers shall be 1” masonry sand or granite dust. Setting

bed for crosswalk pavers shall be 2” masonry sand or granite dust.

On the sidewalk, the gold shall be laid with hand tight setting bed joints to the

Running Bond pattern. Saw cut gold brick as required. Gold brick shall be started

at the starter courses and progress inward. In no case shall the concrete base in

front of the gold paving be disturbed or walked on during the laying of the gold

brick.

On the crosswalks, the gold bricks shall be laid with hand tight setting bed joints

to the Herringbone pattern. Gold brick shall be started at either end and progress

across the crosswalk. In no case shall the concrete base in front of the gold brick

be disturbed or walked on during the laying of the brick. Plywood panels shall

be used to protect the newly laid pavers and working surfaces. The panels shall

be advanced as the work progresses.

Joints shall be filled by sweeping in a dry mixture of masonry sand or granite dust

until the joints are completely filled. Fog lightly with water.

D. Cleaning:

All masonry work shall be thoroughly cleaned.

1. Clean a sample of approximately 20 square feet. Do not proceed with

further cleaning until approved by the Engineer.

2. Clean initially with stiff brushes and water to meet Engineer's approval.

3. If additional cleaning is required, use cleaning agent following brick

manufacturer's recommendations.

a) Damaged materials and work to be replaced at Contractor's expense.

b) Upon completion of the work, remove from site all excess

materials, debris, tools, and equipment. Repair damage

resulting from work operations.

4.0 Method of Measurement and Payment:

Unit paving shall include the cost of materials (bricks and bedding material) the cost of


5

handling, installation, and any other incidental work required to complete the work as

specified herein and shown on the plans. Unit paving shall be paid for at the unit price

per square foot. The quantities of unit paving shall be computed as the actual quantity of

material installed in place.

Pay Items Pay Units

Brick Pavers, Sidewalk S.F.

Brick Pavers, Crosswalk S.F.


1


FOR

CASING PIPE

1.0 Description:

Work Included: Without intending to limit or restrict the extent of the work

involved, the work generally includes:

Construction of a XXX linear feet encased underground trenchless road crossings.

(See roadway plans)

2.0 Materials:

A. Quality Assurance:

1. Workmen Qualifications:

a) The trenchless technology contractor shall have successfully

completed crossing of similar diameter and length within the

past 5 years.

b) Use only personnel thoroughly trained and experienced in the skills

required. The field supervisor of trenchless operations and the

machine operator shall have not less than 12 months experience in

the operation of the equipment being used.

c) Welds shall be made only by welders, tackers and welding

operators who have been previously qualified by tests as

prescribed in the Structural Welding Code AWS D1.1 of the

American Welding Society to perform the type of work required.

Show proof of certification when requested by the Owner.

2. Design Criteria:

Encasing conduit under the road shall be of sufficient strength to support

all loads as determined by the contractor. The minimum specified wall

thickness is based upon external loading requirements plus 1/16-inch for

corrosion loss.

3. Requirements of Regulatory Agencies:

Materials and methods of construction used on City right-of-way shall be

subject to the approval of the Owner and the Contractor shall be subject to

the approval of the Owner and the Contractor shall at all times conduct his


2

work and operations fully within the City's rules, regulations and

requirements. The Contractor must ascertain from the City rules,

regulations and requirements, and what, if any, delays may be encountered.

The Contractor must submit for approval specific details of the methods of

construction he intends to utilize together with any sketches or drawings.

4. Source Quality Control, Inspection and Certification by Manufacturer:

Steel Pipe:

The manufacturer of the steel pipe shall furnish a sworn statement that the

inspection and all of the specified tests have been made on the Straight-

Seam (Longitudinally) Welded Steel Pipe as required by ASTM A-139,

Grade B, and the results thereof comply with the requirements of that

standard.

5. Reference Standards:

a) American Water Works Association (AWWA):

AWWA M11, Steel Pipe A Guide For Design and Installation.

AWWA C200 Steel Water Pipe - 6-inch and Larger

b) American Society for Testing and Materials:

ASTM A 139 Grade B, Electric-Fusion (Arc) - Welded Steel Pipe

(Sizes 4 inch and over).

c) American Welding Society:

AWS D1.1 Structural Welding Code.

B. Submittals:

1. Workman Qualifications:

Furnish references, resumes and certifications for company and

workman qualifications required.

2. Shop Drawings and Product Data:

Furnish completely dimensioned shop drawings, catalog cuts or other data

as required to provide a complete description of products to be installed.

a) Description of method to remove and dispose of spoil,

slurry, and groundwater.

b) Maximum anticipated loads and supporting calculations

resulting from casing pipe installation.

c) Description of any proposed dewatering system including the

arrangement, location and depth of components.

d) Location and dimension of construction pits and shafts along with

supporting calculations for earth retention and thrust reaction, sealed

by an engineer licensed in the Commonwealth of Virginia.


3

e) A description of the grade and alignment control system.

f) Description of lubrication and/or grouting systems applicable.

g) Layout plans and description of operational sequence.

h) Plan for monitoring ground surface movements, including

method and frequency of measurement.

i) Contingency plan for loss of ground.

3. Certificates: Certified records or reports of results of shop tests, such

records or reports to contain a sworn statement that shop tests have been

made as specified.

C. Product Delivery, Storage and Handling:

Transport, handle and store materials and products specified herein in a manner

recommended by the respective manufactures of such to prevent damage and

defects.

D. Job Conditions:

1. Scheduling: Operations, once started, shall be continuous until completed.

2. Protection:

a) Adequately support and protect utilities and facilities that are

encountered in, or may be affected by the work.

b) The Contractor must observe all necessary and appropriate

safety precautions when working on City right of way or

property.

c) Blasting will not be permitted.

d) All excavations shall be sheeted, shored and braced as

necessary to prevent subsurface subsidence.

e) Construction pits shall be kept dewatered, and pumps shall be

attended on a 24-hour basis, if conditions so require. Close

observation shall be maintained to detect any settlement or

displacement or roadway embankment, and facilities during

dewatering operations. Dewater into a sediment trap and comply

with applicable environmental protection criteria specified

elsewhere in these Contract Documents.

f) Maintain the air in the pipe, when hand excavating, in a condition

suitable for the health of the workmen at all times.

g) All trees to be removed for construction operations shall be

identified and approved by the City prior to removal. Other trees


4

in the work area shall be protected in accordance with these

documents.

h) Dewatering systems shall be designed to not cause damage to

existing properties, buildings, structures, utilities, and other work

due to the loss of ground from incompletely drained (flowing) soils,

removal of soil particles in the discharge, or consolidation

settlement of dewatered soils.

i) Excavation methods which depend upon dewatering rather than

slurry, compressed air, or full face grouting to control stability of the

face, shall include 25 feet deep monitoring wells to verify the

adequacy of dewatering at a minimum of two locations between the

maximum spaced well points as approved by the engineer.

Monitoring wells in the roadway shall be installed between the

hours of midnight and 6:00 a.m. and be provided with flush mount

well head covers having an H20 Load Rating. The wells shall be cut

off below the pavement section and abandoned in accordance with

state requirements at the completion of construction.

2.0 Materials:

A. Encasing Conduit:

Steel Pipe: ASTM A139, Grade B - Straight-Seam (Longitudinal) Welded Pipe

Minimum diameter and wall thickness as shown below:

Inside Diameter Nominal Wall Thickness

36-inch 0.5-inch

Reference Standards: Comply with applicable provisions and - recommendations

of the following, except where otherwise shown or specified:

1. OSHA 1910.144, Safety Color Code for Marking Physical Hazards.

2. EPA 40 CFR Part 50 National Primary and Secondary Air Quality

Standards.

3. EPA 40 CFR Parts 260 - 299, Solid Wastes. 4. NSF Standard 61- Drinking

Water System Components - Health Effects.


5

B. Force Main Pipe and Fittings

Ductile Iron Pipe: See Section 232 (b) in VDOT Road and Bridge Specifications,

2016.

C. Miscellaneous Material:

1. End Seals: Seamless ⅛ inch synthetic rubber end seals Model AW @ as

manufactured by PSI, Cascade or approved equal; complete with

stainless steel banding straps.

2. Casing Spacers: As manufactured by PSI, Cascade or equal.

a) Material: Painted steel band, PVC liner, steel riser and glass

reinforced plastic runners Model A8G-1.

b) Installation: Per Contract Drawings with 1-inch maximum

clearance between runner and top of casing pipe.

3. Leak Detector: VDOT Standard LD-1 and as detailed in the Contract

Drawings. Location of above grade portion to be installed as not to impact

traffic or safety as decided by the City. All bends and additional pipe to be

installed per VDOT Standards. External coating shall be per City of

Virginia Beach and VDOT Standards; color to be selected by the City.

D. Contractor Options in Products:

The Contractor may install a larger or smaller diameter encasing conduit than is

shown on the Drawings, provided that the Contractor has secured the prior written

approval of VDOT and the City and other agencies having jurisdiction. If the

Contractor elects to install a larger or smaller diameter encasing conduit than is

shown on the Drawings, all necessary clearances under the roadways, pipe lines or

other structures shall be maintained. Substitution of a larger or smaller diameter

encasing conduit will be made without additional compensation over the price bid.

3.0 Procedure:

A. General:

Inspect Materials and products before installing in conformance with the

inspection requirements of the appropriate referenced standard.

Remove rejected Materials and Products from the Project Site.


6

B. Preparation:

The size of pits shall be kept at a minimum to protect trees, utilities and minimize

excavation. See Contract Drawing for maximum pit size.

C. Performance:

1. Excavation and Backfill:

As specified in Section 303 and such added requirements

included herein.

a) Pits shall be located adjacent to existing edge of pavement.

b) Cut the end of the construction pit away from the entry face

perpendicular to the axis of the casing pipe installation operation to

provide a bearing surface for the back stop and blocking.

c) Construct the back stop if required of heavy timber or steel rails

capable of withstanding loads generated by the casing pipe

installation operation.

d) The nominal construction pit dimensions are shown on the Drawings.

e) Install the casing pipe to the clearance shown on the Drawings.

The line and grade tolerances of pipe installed shall be + 6 inches

on line between shafts, unless otherwise stated in the contract

documents or approved by the engineer. A return to line and

grade shall be 1 inch in 25 feet.

f) Should the Contractor excavate below the required subgrade for the

sewer forcemain, he will be required to backfill the area below the

subgrade with coarse aggregate fill or with concrete as required by

the City at his own expense and at no additional cost to the City.

g) Sheet and shore the construction pit as necessary. Provide a sump -

pump in one (1) comer of the pit to provide for dewatering.

Additional stone used at the Contractors option for dewatering shall

be at his expense and at no additional cost to the City.

h) After the force main is in place and has been tested, backfill the

trenches and construction pits.

2. Installation of Casing Pipe:

a) Encase all force main pipe crossings under roadway in a steel

encasing pipe. Install all steel casing by a trenchless method. The

type of trenchless method of installing the casing pipe must be

approved by the City and other regulatory agencies claiming


7

jurisdiction. No additional payment over the price bid per linear

foot for the particular crossing will be made unless such additional

payment is specifically authorized by the City in writing.

b) Install the casing pipe true to line and grade without hand mining

ahead of the pipe. Bored hole to be essentially the same as the

outside diameter of the casing pipe, and over-cutting by the cutting

head is not to exceed the outside diameter of the casing pipe by

more than one half inch. If voids should develop, or if the bored

hole diameter is greater than the outside diameter of the casing pipe

by more than approximately l-inch, employ grouting or other

methods approved by the City to fill such voids.

c) The front of the pipe shall be provided with a mechanical

arrangement or device that will positively prevent the auger and

cutting head from leading the pipe, so that there will be no

unsupported excavation ahead of the pipe. Design the equipment

such that the auger and mechanical stop is removable from within

the pipe in the event an obstruction is encountered. Arrange the

face of the cutting head to provide reasonable obstruction to the free

flow of soft or poor material.

f) A pipe lubricant system using an approved lubricant may be used to

lower the friction developed on the surface of the pipe during

casing pipe installation with the approval of the engineer. The pipe

lubrication system pressure shall be continuously monitored,

recorded, and controlled to prevent pipe buckling and/or ground

heave.

g) If field conditions so require, the casing pipe installation operation

shall be continued without interruption, except to install new lengths

of casing pipe. Join the lengths of casing pipe by welding.

Completely weld the joints around the circumference of the pipe.

3. Installation and Testing Carrier Pipe:

Install the force main one (1) pipe length at a time and push through the

steel casing pipe on casing spacers. Assemble the mechanical joints before

pushing.

4. Closing Encasing Pipe: After the force main pipe has been installed and

tested, close both ends of the encasing conduit with casing end seals to

prevent entrance of material.

5. Leak Detector: Install leak detector piping and appurtenances as shown

on the Drawings.

6. Cleanup: Right of way and easement shall be restored to condition


8

equal to or better than that which existed prior to the start of the work.


Casing pipe shall be measured and paid for by the complete in-place feet which will

include the cost of furnishing all labor, equipment and materials necessary to complete

the work described in this section. This includes but is not limited to all excavation

(including pits); trenching and backfilling; sheeting and shoring; dewatering; steel pipe,

casing spacers, and end seals; leak detectors; coatings and linings; shrub protection and

associated landscaping, installation, utility protection, disposal and protection.

Temporary removal, storage and complete reinstallation of all signs and complete surface

restoration including but not limited to pavement, curb and walk.

Pay Item Pay Unit

Casing pipe, (diameter) L.F.


1


FOR

BYPASS PUMPING

1.0 Description:

This work shall consist of bypass pumping stormwater around the project site located at

the western end of the Cleveland Street cul-de-sac in accordance with the pump-around

operation.

A. Under this item, the Contractor is required to furnish all materials, labor, equipment,

power, maintenance, etc. to implement a temporary pumping system for diverting

the existing flow around the work area for the duration of the project.

B. The design, installation and operation of the bypass pumping system shall be the

Contractor’s responsibility. The Contractor shall employ the services of a vendor

who can demonstrate to the Engineer that they specialize in the design and

operation of temporary bypass pumping systems. The bypass pumping system

shall meet the requirements of all applicable codes and regulatory agencies having

jurisdiction.

2.0 Requirements for Submitting Bids:

A. The Contractor and vendor shall prepare a specific, detailed description of the

proposed pumping system and be prepared to submit it for approval by the

Engineer, should the Contractor be awarded this project.

B. The plan shall include, but not be limited to, details of the following:

1. Staging areas for pumps;

2. Sheeting or plating upstream and downstream water;

3. Number, size, material, location and method of installation of suction piping;

4. Number, size, material, method of installation and location of discharge piping;

5. Bypass pump sizes, capacity, number of each size to be on site and power

requirements;

6. Calculations of static lift, friction losses and flow velocity (pump curves

showing pump operating range shall be submitted);

7. Standby power generator size, location;

8. Downstream discharge plan;

9. Method of protecting discharge location from erosion and damage;

10. Thrust and restraint block sizes and locations, if necessary;

11. Sections showing suction and discharge pipe depth, embedment, select

fill and special backfill;

12. Method of noise control for each pump and/or generator;


2

13. Any temporary pipe supports and anchoring required;

14. Design plan and computation for access to bypass pumping locations

indicated on the drawings;

15. Calculations for selection of bypass pumping pipe size;

16. Schedule for installation and maintenance of bypass pumping lines;

17. Plan indicating selection location of bypass pumping line locations.

3.0 Procedure:

A. Equipment

All pumps used shall be fully automatic self-priming units that do not require the

use of footvalves or vacuum pumps in the priming system. The pumps may be

electric or diesel powered. All pumps used must be constructed to allow dry

running for long periods of time to accommodate the nature of stormwater flows.

The Contractor shall provide the necessary stop/start controls for each pump.

B. System Description:

1. Design Requirements

Bypass pumping systems shall have sufficient capacity to pump the flow rates

for the 2 and 10-year storms. The Contractor shall provide all pumps of

adequate size to handle peak flow, and temporary discharge piping to ensure

that the total flow can be safely diverted around the culvert to be installed.

The Contractor shall have adequate standby equipment available and ready

for immediate operation and use in the event of an emergency or breakdown.

Bypass pumping system shall be capable of bypass pumping the flow around

the work area and of releasing any amount of flow up to full available flow

into the work area as necessary for satisfactory performance of work.

2. Performance Requirements

The design, installation and operation of the temporary pumping system

shall be the Contractor’s responsibility. The bypass system shall meet

the requirements of all applicable codes and regulatory agencies having

jurisdiction.

The Contractor shall provide all necessary means to safely convey the storm

water past the work area.

The Contractor shall protect water resources, wetlands and other natural


3

resources not permitting for impacts.


Bypass pumping, where called out on the plans or in the notes, will be paid for at the

contract lump sum price. The cost of sheeting, plating and dewatering of the specific

excavation at each site will be covered under separate line item for “Cofferdam”, as noted

in the Virginia Department of Transportation Road and Bridge Specifications, 2016. The

cost of the bypass pumping shall include all materials, labor, equipment, power,

maintenance, etc. to implement a temporary bypass pumping system for the purpose of

diverting the existing flow around the work area for the duration of the project. Any

stilling basin, stabilized outlet, energy dissipaters or other erosion and sediment control

measures necessary to perform the bypass pumping operation will be considered incidental

to the cost of bypass pumping.

Pay Item Pay Unit

Bypass Pumping L.S.

Last Revised September 16, 2002

1


FOR

TEXTURED PAVEMENT

1.0 Description

Textured pavement provides a highly durable surface to roadways that supplies the

aesthetic appeal of block paving without the maintenance and safety problems

associated with individual block elements. The pavement surface is comprised of an

imprinted or textured waterproof surface layer, with either an integral full depth color

or a surface applied colored coating. The use of this material eliminates concerns

from traditional block paving and stamped concrete installations such as maintenance

and repair, skid resistance, design limitations, weed infestation, loose blocks causing

a tripping hazard, and degradation due to salt corrosion.

A. Features & Benefits:

1. Can be installed onto most substrates,

2. Quick and easy to install with little site preparation,

3. No excavation – environmentally friendly,

4. Short curing time reduces traffic disruption,

5. Available in a wide variety of patterns and colors,

6. No Weed growth.

B. Uses:

1. Traffic calming schemes,

2. Crosswalks and pedestrian areas,

3. Traffic circles,

4. Raised junctions,

5. Enhancement of urban areas,

6. Speed tables.

2.0 Procedure:

A. Before commencing the work, at the installer's discretion a recess

approximately 4” wide x ¾” deep may be formed by saw cutting and

planning the road surface in order to key in the surface applied material.

B. Following sweeping, cleaning and/or drying of the road surface, the material

used to provide the textured pavement shall be installed over an existing

concrete or asphalt road surface. At the manufacturer's discretion, a primer

or tack coat may be used.


2

C. Layout and imprinting of the asphalt or synthetic asphalt material shall be per

the drawings and/or specifications. Imprinting shall proceed immediately

after the hot material has been placed, while it is still in a warm to hot

pliable state.

3.0 Performance Characteristics:

A. Thickness of Material

The material shall be applied at an average thickness of ½” - ¾” (13 mm -19

mm) above the existing road surface. Minor indentations in the existing

surface may be filled with extra material in order to provide a smooth surface.

B. Texture Depth

When imprinting the material, the indentation provided shall have a texture

depth ranging from a minimum of 0.2” (5 mm) to a maximum of 0.4” (10

mm).

C. Wear - Texture Depth:

1. After one (1) year of wear and abrasion, the texture depth of the

indentations in the material shall be equal to or more than 80% of

the original texture depth.

2. After three (3) years of wear and abrasion, the texture depth of the

indentations in the material shall be equal to or more than 50% of the

original texture depth.

3. After five (5) years of wear and abrasion, the texture depth of the

indentations in the material shall be equal to or more than 30% of the

original texture depth.

Test procedure: The Owner will inspect the installation using a micrometer to

measure the depth of the indentations at the end of each 6-month period after

the date the installation is completed. Indentations shall be measured at 20

locations - 15 locations shall be in the wheel tracks and 5 locations shall be

outside the wheel tracks. A simple average will be computed of the 20

readings, and applied to the above requirements. In the event that texture

depth is not maintained to these requirements, then the contractor shall be

required to refurbish the color at his/her expense.

D. Wear - Color

The applied material shall maintain the specified color throughout its service

life. At the end of each 6-month period after the date the installation is

completed, color will be verified using the following procedure. In the event


3

that color is not maintained, then the contractor shall be required to refurbish

the color at his/her expense.

Test procedure: The Owner will inspect the installation site through a clear

plastic screen that is 10” (25.4 cm) x 10” (25.4 cm). The screen will have grid

lines with 1” (2.54 cm) separation in the horizontal and vertical directions,

giving a total of 100 squares.

The screen will be placed flat on the installation surface in 8 locations - 6

locations shall be in the wheel tracks and 2 locations shall be outside the

wheel tracks. At each location, for each of the 100 grid squares, the inspector

shall subjectively identify the number of grid squares whose area retains at

least 80% of the original color.

The numbers shall be entered into the following table, and a calculation made

as to the percentage of total surface area retaining the original color.

Location Grid squares with

>80% original color

Grid squares with

< = 80% original

color

Total grid

squares

Wheeltrack – A A 100-A 100

Wheeltrack – B B 100-B 100

Wheeltrack – C C 100-C 100

Wheeltrack – D D 100-D 100

Wheeltrack – E C 100-C 100

Wheeltrack – F D 100-D 100

Non-wheeltrack – G E 100-E 100

Non-wheeltrack – H F 100-F 100

Total squares Total with > 80%

(A+B+C+D+E+F+G+H)

800-Total 800

Percentage of squares with > 80% color = Total/800 x 100

If percentage of squares with >80% color is less than 80%, then the project

will be defined as not having maintained it color.

E. Skid Resistance

The material shall maintain a skid resistance greater than or equal to 55%, as

measured using a skid resistance pendulum tester.

Test procedure: The Owners shall inspect the installation using a pendulum

tester at the end of each 6-month period after the date the installation is

completed. Skid resistance shall be measured at 20 locations – 15 locations


4

shall be in the wheel tracks and 5 locations shall be outside the wheel tracks.

A simple average will be computed in the 20 readings, and applied to the

above requirements. In the event that skid resistance is not maintained to the

stated requirement, then the Contractor shall be required to refurbish the

surface at his/her expense.


Textured pavement shall include the cost of materials, labor, equipment and any other

incidental work required to complete the work as specified herein and shown on the

plans. Textured pavement shall be paid for at a unit price per square foot.

Pay Item Pay Unit

Textured Pavement, (pattern & color) S.F.


1


FOR

FLOWABLE BACKFILL

1.0 Description:

This work shall consist of placing of flowable backfill in lieu of compacted soil or

aggregate backfill. Flowable backfill or any other backfill of non-neutral pH shall not

be used near any metal pipe.

2.0 Materials:

Hydraulic Cement shall conform to the requirements of Section 214.

Fly Ash shall have no specific requirement for fineness, loss of ignition, or

reactivity.

Water shall conform to the requirements of Section 216.

Aggregates shall conform to the requirements of Sections 202 and 203 with a combined

gradation as determined by the Contractor.

Admixtures shall conform to the requirements of Section 215.

Granulated Iron Blast Furnace Slag shall conform to the requirements of Section 215.

3.0 Mixture Design:

Mixture design for flowable backfill shall be provided by the Contractor. Flowable

backfill shall have a design compressive strength of 30 to 200 psi at 28 days when tested

in accordance with AASHTO T-23. Mixture design shall result in a fluid product having

an 8 inches to 10 inches slump at time of placement. The Contractor shall submit a

mixture design for approval supported by laboratory test data verifying compliance with

28 day compressive strength requirements. Mix design shall be approved by the

Engineer prior to placement.

4.0 Procedures:

Mixing and transporting shall be in accordance with Section 217 or by other methods

approved by the Engineer.

Temperature of backfill shall be at least 50 degrees Fahrenheit at time of placement.


2

Material shall be protected from freezing for 24 hours after placement.

When used as backfill for pipe and floatation or misalignment occurs, correct

alignment of the pipe culvert shall be assured by means of straps, soil anchors or other

approved means of restraint.


When not shown as a bid item, flowable backfill will not be measured for separate

payment but the cost thereof shall be included in the price bid for the appropriate item.

If flowable backfill is a separate payment, flowable backfill shall be paid for at the unit

price per cubic yard. The quantities of unit shall be computed as the actual quantity of

material installed in place.

Such price shall be full compensation for furnishing and installing flowable backfill

and for all materials, labor, tools, equipment and incidentals necessary to complete the

work.

Pay Item Pay Unit

Flowable backfill C.Y.


1


FOR

MICROWAVE DETECTORS

1.0 Description:

This work shall consist of furnishing and installing microwave detectors for traffic

detection in accordance with these specifications and as shown on the plans or as directed

by the Engineer.

2.0 Functional:

Microwave detectors shall detect motion of every type of licensed vehicle traveling at least

two (2) miles per hour or greater and provide an output compatible for use with traffic

signal controllers for detection of traffic. Detector shall have a response time of 0.25

seconds and a hold time of one (1) second. Detector shall be self-tuning with a maximum

warm up time of five (5) minutes. Detector shall be capable of detecting directional

motion (approach only or depart only) and shall have a manual switching mechanism to

allow the operator to select approach or depart. Detection range shall have a user

selectable switch for high gain and low gain. Detectors shall have a 16° cone of detection

with a detection range of at least three feet to two hundred feet for automobiles, and three

feet to three hundred fifty feet for commercial trucks.

Microwave detectors shall operate at a frequency of 10.525 Ghz as allowed under the

FCC Rules, Part 15. A means of preventing cross talk between units shall be provided

within the unit. Microwave units shall have FCC certification and identifier number. The

manufacturer shall test all units to FCC specifications and supply a medical statement as

to the safety of the units to the general public; specifically to pace-makers.

Detectors, except for the power supply, shall be a self-contained unit enclosed within a

water resistant aluminum housing with a high impact plastic opening in front of the

antenna. Detectors shall be capable to operate at 12 to 24 VAC/DC. Power supply shall

consist of an UL listed step-down transformer mounted within the traffic signal controller

cabinet which shall reduce the 120 VAC incoming power to 12 VAC for operation of the

detectors.

Detectors shall failsafe the relay in the recall position in the event of transceiver or power

failure. Detectors shall have three LED's mounted on the printed circuit board; the colors

of the LED's shall be red, green, and yellow. The red LED shall be the relay indicator and

shall illuminate when the relay has changed state, either in response to a motion detection

or in response to a fault. When a fault is detected, the red LED shall blink, and the relay

shall change state and remain in the “CALL” condition. The green LED shall be the


2

microwave module fault indicator. The green LED shall illuminate when there is a fault

detected in the microwave module. This condition shall also cause the red LED to blink,

and the relay will send a constant “CALL” signal. The yellow LED shall be the detection

indicator. The yellow LED shall blink whenever a moving target in the selected direction

has been detected.

Detectors shall be capable of being mounted on the side of a pole or overhead at a height

of between 10 and 25 feet.

Detectors shall be capable of continuous operation over the temperature range of -35° F to

165° F.

3.0 Construction:

Mounting hardware shall be fabricated from galvanized steel or a corrosion resistant metal

and shall be supplied with the detectors to facilitate side of the pole and overhead

mounting. The cabinet lead in harness shall be labeled “MICWAV” and in accordance

with Section 703.03(g) of the Specifications.

4.0 Measurement and Payment:

Microwave detectors will be measured in units of each and will be paid for at the

contract unit price per each. This price shall include microwave detectors, mounting

hardware, and power supplies.

Payment will be made under:

Pay Item Pay Unit

Microwave Detector Each

Last Revised April 11, 2003

1


FOR

WATER AND SANITARY SEWER RECORD DRAWINGS

1.0 Scope:

The Contractor shall maintain and keep one (1) set of drawings on site, updated with all

changes made during the construction of this project. That set will become the “Record

Drawings”.

2.0 Procedure:

All notations shall be neat and complete on the record drawings. The record drawings will

include, but not limited to, the record location(s), for change, revisions, and change orders

made for the following items:

A. Size, material, horizontal location and vertical elevation of existing public and

private utilities uncovered during the course of the work. This shall include

telephone cables and conduits, TV cables, electrical cables and conduits, gas lines,

water lines, sewer force mains, sanitary sewers, storm sewers, and the like.

B. Horizontal location and vertical elevation of installed water mains, force mains,

and vacuum mains at every 100-foot station, and at all fittings.

C. Location (horizontal and vertical) and size of sewer taps and water main taps

made, including corporations used for testing and chlorinating purposes; stations

and offset distances to new water meter boxes, sanitary sewer cleanouts, and

vacuum pits; and size of water and sewer service lines installed.

D. Sizes and types of materials used, changes in sizes and types of materials, and rim

and invert elevations of manholes, mainline cleanouts, sanitary sewer cleanouts,

and vacuum valve pits installed or tied into.

E. When constructing Vacuum Sanitary Sewer Systems the Contractor shall

complete standard pit drawings in conformance with the standard format provided

by the Owner. Pit drawings shall include; type of pit, (deep or std.), horizontal and

vertical elevations for all sanitary sewer laterals including the location of

cleanouts, the rim elevation of the valve pit, and the property addresses that

correspond to each lateral.

F. Location (horizontal and vertical) of lines plugged, capped, or abandoned.

G. Location (horizontal and vertical) of sleeves, bends, reducers, restrained fittings


2

and type of restraint used.

H. Depth from rim of valve box to top of operating nut on valves, and length of valve

extensions installed.

I. Swing ties, stations and offset distances to structures installed such as manholes,

mainline cleanouts, air vents, hydrants, valve boxes, blow-offs, and vacuum gauge

taps.

3.0 Measurement:

The following guidelines for the accuracy of measurement for the record drawings shall

apply:

A. Gravity-fed and vacuum systems, both surface and sub-surface, require +/- 0.01’

vertical and +/- 1’ horizontal.

B. Pressure systems (water) both surface and sub-surface, require +/- 0.1' vertical and

+/- 1’ horizontal.

C. Utility service connections (water and sewer) shall follow the same guidelines as

pertinent to the main system.

4.0 Payment:

The cost of preparing the record drawings will be included in various other items of work.

Monthly progress payments will not be approved for payment until the Project Manager

and the Inspector have verified the Contractor's plans are current with construction.

Within 30 calendar days after the end of construction, at or before submission of the final

invoice, the Contractor shall provide the Inspector with one complete set of drawings

recording the installation of the project, including any field changes or change orders

authorized by the Owner.

These drawings are a specific contract requirement of the Contractor. Final payment will

not be made until these drawings have been submitted in an accepted form.


1


FOR

ESCALATION OF UNIT PRICES

The Owner reserves the right to consider requests for price adjustment for any contract renewal

period. Price adjustments may only be considered for changed in unit prices prior to the

approval of any contract extension period. Increases shall not exceed the average of the CPI-U,

U.S. City Average (not seasonally adjusted) for the previous 12-month period, or five percent

(5%), whichever may be lower.

Last Revised May 8, 2012

1


FOR

CONTROL AND MONITORING OF DEWATERING AND VIBRATION

1.0 Description:

A. This work shall consist of the monitoring and protection of existing structures

from vibration induced damage due to any construction activity including the

operation of pile - driving and other heavy construction equipment.

1. CONTRACTOR shall identify and assign a Vibration Control Specialist

to formulate and execute the Vibration Monitoring and Control Program.

The Vibration Control Specialist shall be a professional engineer,

licensed in the Commonwealth of Virginia, with a background in

geotechnical and structural engineering and shall have a minimum of 3

years of demonstrated experience in vibration monitoring and related

work.

2. The purpose of the Vibration Monitoring and Control Program is to

avoid damages and potential claims that allege damages were caused by

construction activities. The required submittal of the vibration

monitoring plan for approval does not alleviate the CONTRACTOR of

his responsibility to protect existing structures from damage associated

with his construction activities.

B. This work shall consist of the monitoring and protection of existing structures

from dewatering-induced damage due to any construction activity including

settlement due to the lowering of the groundwater necessary to perform

excavations and prepare an adequate and stable subgrade at the bottom of the

excavation.

1. CONTRACTOR shall identify and assign a Dewatering Specialist to

prepare and execute the Dewatering and Groundwater Monitoring and

Control Program. The Dewatering Specialist shall be a professional

engineer, licensed in the Commonwealth of Virginia, with a background

in geotechnical and hydrogeology and shall have a minimum of 3 years

of demonstrated experience in groundwater monitoring and related work.

2. The purpose of the Dewatering and Groundwater Monitoring and

Control Program is to avoid damages and potential claims that alleged

damages were caused by construction activities. The required

submittal of the Dewatering and Groundwater Monitoring Plan for


2

approval does not alleviate the CONTRACTOR of his responsibility to

protect existing structures from damage associated with his

construction activities.

C. Submittals

1. Vibration Monitoring and Control Plan including location of

vibration and crack monitors; name of the Vibration Control

Specialist assigned to the project; and list of structures that may be

susceptible to vibration damage.

2. Pre-Construction Structure Condition Assessment Report.

3. Pre-Construction Horizontal and Vertical Structural Survey Plan.

4. Dewatering Plan for dewatering system. Show arrangement,

locations, and details of wells and well points; locations of headers

and discharge lines; and means of discharge and disposal of water.

a) Include layouts of piezometers and flow-measuring devices

for monitoring performance of dewatering system.

b) Include a written report outlining control procedures to

be adopted if dewatering problems arise.

c) Include Shop Drawings signed and sealed by the

qualified professional engineer responsible for their

preparation.

d) Submit procedures for detection of movement.

5. Qualification Data: For installer and CONTRACTOR's engineer.

6. Photographs or videotape, sufficiently detailed, of existing conditions

of adjoining construction and site improvements that might be

misconstrued as damage caused by dewatering operations or

construction related vibrations. See Paragraph 3.1, CONDITION

ASSESSMENT requirements.

7. Record drawings at Project closeout identifying and locating

capped utilities and other subsurface structural, electrical, or

mechanical conditions performed during dewatering.

8. Note locations and capping depth of wells and well points.

9. Field Test Reports: Before starting excavation, submit test results

and computations demonstrating that the dewatering system is

capable of meeting performance requirements.

10. All required permits for disposal of water from dewatering operations.

D. Project Conditions

Project-Site Information: Geotechnical borings and laboratory information


3

have been provided. OWNER will not be responsible for interpretations or

conclusions drawn from this data.

1. Make additional testing borings and conduct other exploratory operations

necessary for dewatering program and estimates of vibration attention.

2. The geotechnical report and data is included in Appendix of the Project

Manual

2.0 Procedure:

A. Conditional Assessment

1. The contractor shall retain a qualified engineering firm to perform a

condition assessment to document the conditions of nearby buildings

and other sensitive nearby structures prior to the beginning of

construction. The assessment shall be performed on all properties that

could be affected by any CONTRACTOR construction activity due to

the pump station wet well excavation, including but not limited to,

dewatering or vibration within a minimum of 250 feet of the pump

station wet well excavation. The assessment should include video and

photographic documentation of all exteriors and interiors, with the

approval of the OWNER as required, including installation of crack

monitors on facade or interior cracks that might propagate due to

construction vibrations and dewatering operations. All documentation

of existing building conditions and information concerning the type and

location of crack monitors shall be submitted to the OWNER in a

report prior to construction.

2. Before any inspections are performed, the CONTRACTOR shall

notify in writing the property owners of the buildings or other

structures of pending construction operations, and request permission

to enter said properties for the purpose of making these inspections

for the protection of the property owners. In the event that access

for the purpose of determining existing conditions is denied by any

property owners, the CONTRACTOR shall notify the OWNER in

writing and may, thereupon, be relieved of the responsibility for

making such condition inspection with respect to the property for

which access is denied.

3. The inspection of each and every residence and building shall include

a detailed inspection of the condition of all walls, floors, ceilings and

other structural elements, equipment that may be in place, pavements,

sidewalks, wells, and other miscellaneous structures that may become


4

subject to possible damage claims. Such deficiencies as noted shall be

suitably marked on the structure in such a manner as not to

permanently deface such structures. The conditions shall be recorded

in permanent notes accompanied by sketches and colored photographs

as required to fully delineate the extent of deficiencies.

4. The results of these inspections shall be recorded in typed form,

accompanied by the sketches and photographs, and shall be signed by

those making the inspection. The CONTRACTOR should, where

possible, have a representative of the property OWNER present during

these inspections and should secure the signature of said representative

on the completed documents.

5. Prior to monitoring, a copy of all data relative to existing condition

of each respective property, as found by the pre-construction

survey, shall be forwarded to each property owner. Three identical

copies shall be forwarded to the OWNER.

6. A condition assessment report will be prepared and include an

evaluation to identify residential structures and features

susceptible to damage due to contractor activities as justification

for selecting specific locations to monitor cracks and vibrations

during the construction.

B. Pre-construction Structural Survey

1. In order to detect any settlement or movement of buildings, structures

and swimming pools that may be affected by his work, the

CONTRACTOR shall, prior to excavation, dewatering, driving of piles

or driving sheeting, establish a system of vertical and horizontal control

points on or about buildings, structures and swimming pools as

identified in evaluation to identify residential structures and features

susceptible to damage due to contractor activities (Section 2.0 A. 6.

above.). These control points shall be tied to bench marks and indices

sufficiently remote to not be moved by his operation. The

CONTRACTOR shall submit a copy of this Survey Plan to the

OWNER for review and approval. The CONTRACTOR shall engage

the services of a Professional Engineer or Professional Licensed Land

Surveyor, experienced in the survey of property subject to construction

vibration and operations, to develop this plan. Readings shall be taken

of these points and permanently recorded prior to the start of excavation

or pile driving. CONTRACTOR shall coordinate and obtain approval

for access onto private property to establish control points.


5

2. Control points shall be checked weekly or more often if necessary,

by a qualified person under the direction of a Professional Land

Surveyor licensed in the Commonwealth of Virginia. Three copies

of the original horizontal and vertical control points log and

subsequent readings shall be submitted on an approved form to the

OWNER within 48 hours after observations have been made. Any

settlement and/or horizontal movement detected, exceeding ¼

inch, shall be reported immediately to the OWNER, as shall any

cracks, sags, or damage of any nature to affected properties not

noted in the original pre-construction survey. In the event of such

movement or damage, the CONTRACTOR shall take immediate

remedial action to halt further movement and repair damaged

structures and shall keep the OWNER informed of the results.

C. Crack Monitoring During Construction

During all construction, the CONTRACTOR shall perform periodic readings

of the crack monitors that were installed during the condition assessment. All

readings shall be provided to the OWNER within 48 hours of taking the

reading. Provided that the crack readings confirm that vibrations are not

contributing to increasing the crack width, the crack monitors may be read

once per week. More frequent readings may be directed by the OWNER

during activities that are expected to have greater earthborn vibrations, or

during periods where the groundwater is changing rapidly. If the crack

readings suggest that vibrations or dewatering form the project are

contributing to the crack width, then the CONTRACTOR shall immediately

notify the OWNER and suspend those activities which are generating the

earthborn vibrations until the proper course of action has been determined by

the OWNER.

D. Vibration Monitoring During Construction

1. Procedure - The CONTRACTOR shall monitor vibrations at no less

than five locations along the perimeter of the project during all

construction activities. The locations shall be selected by the

CONTRACTOR and approved by the OWNER based on the properties

surveyed in the condition assessment report and the construction

activities anticipated nearby. Prior to construction, a plan of the

monitoring locations shall be submitted to the OWNER. The locations

of the vibration monitors shall be adjusted during construction with

approval by the OWNER. The vibration monitors shall be established


6

at the site so that background vibration may be determined prior to

beginning construction. The sensitivity range of the seismograph

shall be selected so that the recording is initiated below the maximum

allowable particle velocity shown in Figure 1 and extends above the

highest expected intensity. Specific activities of the vibration source

shall be indexed in time to allow correlation with the arrivals on the

vibration.

2. The Vibration Control Specialist shall be on the site during driving

of sheet piling and at all other times that the specialist deems that

significant or damaging vibrations may result from the

CONTRACTOR's activities.

3. Project Vibration Criteria - The maximum allowable particle velocity is

shown in Figure 1. If the data from the monitors indicate that

vibrations are close to or exceeding the established criteria, then the

CONTRACTOR shall immediately notify the OWNER and suspend

those activities which are generating the earthborn vibrations until the

proper course of action has been determined by the OWNER. See

Section NOTIFICATION OF EXCEEDING VIBRATION LIMITS.

4. Instrumentation - The vibration monitors shall consist of digital

seismographs that display the particle velocities and associated

frequencies plotted against the criteria for this project (i.e., Figure

1.) Each seismograph shall contain geophones with response

capability in three mutually perpendicular axes or components: one

vertical and two horizontal (radial and transverse). The frequency

response of the geophones shall be linear from at least 4 Hz to more

than 200Hz. The sensitivity shall range from less than 0.02 in/sec

to more than 5.0 in/sec. The BlastMate III by Instantel is one type of

seismograph that is suitable for this project.

5. Calibration and Instrument Use - The CONTRACTOR shall field

calibrate the vibration monitors before the start of each recording

period. The transducer shall be positioned with the longitudinal

axis toward the vibration source. Transducers must be

adequately coupled with the ground. Operation of all vibration

monitors shall be in accordance with the instrument manufacturer's

instructions and recommendations. Vibration records shall be

collected in waveform plot or strip chart plot. The peak vector sum

of the particle velocity in longitudinal, transverse, and vertical

planes shall be shown along with the respective dominant or

principle frequencies. The highest recorded particle velocity (i.e.,

the vector sum of the three orthogonal directions), when indexed to


7

a particle vibration event, shall be reported as the peak particle

velocity. The recorded peak particle velocity shall be compared to

criteria appropriate for the subject of concern.

6. Complaints The CONTRACTOR is responsible for resolving all

vibration complaints. In the event of a complaint to the OWNER, the

OWNER shall immediately contact the CONTRACTOR. The

CONTRACTOR shall investigate the complaint and prepare a report

documenting all relevant data such as the time and date presented in the

complaint, a description of the construction activities during the subject

time/date, data from the monitoring instruments for the subject

time/date, complaint information and a description (including

photographs, if possible) of the alleged damage. Provided the results of

the complaint report confirm that the vibrations induced by the

CONTRACTOR are not causing damage, the CONTRACTOR may

continue all construction operations. If the results of the complaint

report show that readings from the monitors indicate the vibrations are

exceeding the established criteria or are contributing to crack width,

then the CONTRACTOR shall take steps to modify the construction

activity to achieve acceptable readings. The OWNER will not extend

the contract time or reimburse the CONTRACTOR for delays resulting

from resolution of vibration complaints.

7. Notification of Exceeding Vibration Limits - The Contractor shall

employ a cellular phone notification method to notify the necessary

parties before the allowable vibration parameters are exceeded. Those

being notified shall be (but not limited to): two (2) OWNER inspectors,

CONTRACTOR's Vibration specialist, CONTRACTOR's

Superintendent and CONTRACTOR's representative authorized to

make changes to activity to remedy exceeding parameters.

E. Dewatering Installation

1. The Contractor shall submit to the 0WNER a Dewatering Plan

indicating the proposed locations of dewatering wells, well points,

pumping facilities, dewatering conveyance system, routing,

discharge pipes, and discharge points. The dewatering plan shall

include dewatering methods that will limit the extent of the water

table drawdown beyond the construction, including counter-

pumping wells, thin wall slurry cutoff, jet grouting, sheet pile

walls, and slurry walls, or any combination, or other means of

limiting the generation of water and drawdown, subject to the


8

review and approval of the OWNER. The plan shall include

provisions for the installation and monitoring of sufficient

piezometers to show that all trench excavation is predrained prior to

excavation.

2. Water-Leveling Monitoring – The Contractor shall control pumping rates

to prevent excessive drawdown of the water table during construction

dewatering. The Contractor shall monitor the extent of the water table

drawdown caused by dewatering. The Contractor shall ensure

dewatering efficiency by controlling groundwater pumping rates based

on water level measurements made using continual monitoring

instrumentation, including water level transducers and data loggers

during predrainage and construction dewatering. If dewatering

requirements are not satisfied due to inadequacy or failure of the

dewatering system (loosening of the foundation strata, or instability of

slopes, or damage to foundations or structures), perform work

necessary for reinstatement of foundation soil and damaged structure

resulting from such inadequacy or failure by CONTRACTOR, at no

additional cost to OWNER. Immediately repair damages to adjacent

facilities caused by dewatering operations.

F. Observation Wells

1. Provide, take measurements, and maintain at least the minimum

number of observation wells or piezometers indicated and additional

observation wells may be required by authorities having jurisdiction.

2. Observe and record daily elevation of ground water and

piezometric water levels in observation wells.

3. Repair or replace, within 24 hours, observation wells that become

inactive, damaged, or destroyed. Suspend construction activities

in areas where observation wells are not functioning properly until

reliable observations can be made. Add or remove water from

observation-well risers to demonstrate that observation wells are

functioning properly.

Decommission or abandon observation wells all in accordance with

local and state requirements, but at a minimum remove piezometers,

and fill holes when dewatering is completed.

G. Post-Construction Structural Survey

Following completion of the work, the CONTRACTOR shall conduct a post-

construction inspection of all structures previously inspected under the pre-


9

construction structural survey. Documentation procedures shall be identical

to those performed under the pre-construction inspection. Changes or

deviation from the pre-construction inspection conditions in any structure

shall be identified and described in the post-construction inspection

document. Three copies of the post-construction document shall be

submitted to the OWNER for his records. 4.0 Method of Measurement and Payment

Payment for the act of dewatering is not paid for separately but incidental to other

items. Payment for all monitoring and control for dewatering and vibration

activities described in the supplemental specification shall be made at the lump

sum price and shall be full compensation for all tools, labor, materials,

equipment and incidentals necessary to complete the work. The entire lump sum

payment will be made on percentages of the lump sum bid item per the following

schedule (CONTRACTOR is responsible for determining appropriate order of

activities):

A. 25% Evaluation (submitting for approval by OWNER):

• Submission of Vibration/Dewatering Monitoring and Control

Plan

• Pre-Construction Structure Condition Assessment Report

B. 15% Final Control and Monitoring Plan and Existing Conditions

• Final Reports (from item A)

• Pre-Construction Horizontal and Vertical Structural Survey Plan

• Documentation of existing conditions

• Field Test Reports

C. 50% Monitoring and control (arrive at monthly basis for invoice)

• Monitoring and Control of Dewatering

• Monitoring and Control of Vibrations

D. 10% Demobilization of Dewatering and Vibration facilities

Pay Item Pay Unit

Control and monitoring of dewatering & vibration L.S.


1


FOR

CONTAMINATED GROUNDWATER MANAGEMENT

1.0 Description

This section includes management of contaminated groundwater from construction

dewatering activities.

A. Definitions:

1. Contaminated Effluent: Effluent from construction dewatering activities

that is impacted with contaminants of concern and require special handling

in accordance with applicable federal and state regulations.

2. Contaminated Groundwater: Groundwater that is impacted with

contaminants of concern and require special handling in accordance with

applicable federal and state regulations.

3. Effluent: Groundwater pumped from the ground during construction.

4. EPA: Environmental Protection Agency

5. HRSD: Hampton Roads Sanitation District

6. HRSD Industrial Wastewater Permit: HRSD permit in a form of a Letter

of Authorization that allows contaminated groundwater to be discharged

into the sanitary sewer system for treatment by HRSD.

7. VDEQ: Virginia Department of Environmental Quality

8. VPDES: Virginia Pollutant Discharge Elimination System

B. Action Submittals:

1. Contaminated Groundwater Management Plan: Submit a Contaminated

Groundwater Management Plan within 30 days of contract award but prior

to construction commencement. This plan shall include:

a) Summary of information regarding the location and nature of

known or suspected groundwater contamination from studies

provided by the HRSD.

b) Summary of permits required for the discharge and plan for

securing such permits.

c) Proposed methods and procedures for contaminated groundwater

management generated from construction dewatering activities

including treatment equipment required.


2

d) Sampling, monitoring and reporting requirements and plans.

2. Proposed Protection Measures: Submit informational report, including

drawings, indicating the measures proposed for worker protection from

contaminated groundwater in accordance to applicable federal and state

regulations.

C. Required Informational Submittals:

Discharge Permit Submittals: Provide all contaminated groundwater

discharge permits, correspondence and submittals related to VPDES permit

compliance to include Discharge Monitor Reports (DMRs), and reporting for

compliance with HRSD’s Industrial Waste Water Permit, if applicable.

D. Quality Assurance:

1. Regulatory Requirements:

Review the requirements of all permits issued for contaminated

groundwater discharge. Comply with governing EPA regulations in regard

to discharging contaminated groundwater before beginning construction.

2. Contaminated Groundwater Management Conference:

Conduct a contaminated groundwater discharge conference at project site.

Review methods and procedures related to contaminated groundwater

management including, but not limited to, the following:

a) Review and discuss the Contaminated Groundwater Management

Plan including duties of contaminated groundwater management

coordinator responsible for this task.

b) Review plan for documenting volume of effluent generated.

c) Review procedures for encountering and discharging of known or

suspect contaminated effluent.

2.0 Procedure:

A. Groundwater Management Protocols

Comply with applicable Contract document terms, regulations, approvals, and

permit conditions regarding dewatering. Measures to direct discharge to both

HRSD and state waters under a VPDES permit shall be explored and

implemented as appropriate.


3

Employ best management practices as required by Virginia Erosion and Sediment

Control Law including use of control measures, such as sediment basins and

dewatering structures, per VDEQ regulations.

Monitor dewatering discharge to ensure compliance with regulations and permits.

Sample if required by permitting agency and adjust control measures accordingly.

B. Plan Implementation:

1. General: Implement approved contaminated groundwater management

plan.

2. Training: Train workers, subcontractors, and suppliers on proper

contaminated groundwater management procedures, as appropriate for the

work.

C. Execution:

1. The contractor shall dewater only the minimum volume of groundwater as

necessary to construct the proposed improvement.

2. Apply for and secure all permits required to discharge contaminated

groundwater. Contractor shall be the Permittee for all required permits to

discharge contaminated groundwater, and will be solely responsible for

compliance with all provisions of the applicable permit(s). HRSD will

periodically monitor compliance. Any upset, as defined by VDEQ or

HRSD, shall be reported to HRSD immediately.

3. Dewatering discharge shall be monitored to ensure compliance with

regulations and permits. Sample in accordance to EPA and permit

requirements and adjust control measures accordingly.

4. Discharge as per regulations and applicable permits.

5. If during construction activities, the contractor detects a petroleum odor or

other evidence of groundwater contamination (e.g. staining, turbidity, etc.)

in an area of unknown contamination, then the contractor shall

immediately call the HRSD to report the suspected contaminated

groundwater. All work should be temporarily stopped in this area of

suspect contamination until additional guidance is provided by HRSD

regarding the handling and treatment of such materials.

6. Contractor shall not discharge any contaminated groundwater except as

authorized and specified by applicable permits.



4

Information regarding the location and nature of known or suspected groundwater

contamination from previous studies is provided to assist the contractor in calculating the

quantity and cost for managing contaminated groundwater during construction

dewatering activities. Therefore, costs associated with the proper management of

contaminated groundwater shall be included in the lump sum bid for this project.

Pay Item Pay Unit

Contaminated Groundwater L.S.


1


FOR

CONTRACTOR TO OBTAIN CONSTRUCTION GENERAL PERMIT

Effective Date: July 1, 2015

1.0 Scope:

The Contractor shall submit a Stormwater Pollution Prevention Plan (SWPPP) for review

and approval in order to obtain a Construction General Permit (CGP) from Virginia

Department of Environmental Quality (VDEQ). A SWPPP was prepared for this project

in accordance with Virginia Pollutant Discharge Elimination System (VPDES) as

contained in the VDEQ VPDES stormwater general permit and implementing regulations

(9VAC25-880 et. seq.), and has been included in the bid document. The Contractor

may formally submit the provided SWPPP or prepare and submit his own

independently. If Contractor chooses to prepare his own SWPPP independently, it shall

be at least as stringent as the provided SWPPP. No additional time shall be granted to

the Contractor for neither preparation and submittal of SWPPP, nor approval of same

and receipt of CGP.

The SWPPP is intended to control pollutant discharges in stormwater by some

combination of interception, filtration, and containment. The SWPPP requires all

construction related activities and associated pollution prevention measures be

documented, inspected, and maintained by the Contractor throughout the construction

stages of the project until final stabilization is achieved and a Notice of Termination has

been received and accepted by the Department of Public Works’ VSMP Administrator. 2.0 Compliance Procedure:

A. Contractor Review and Acknowledgment of SWPPP; Inspections Conducted by Qualified Personnel:

The Contractor shall:

1. Complete and execute the Construction General Permit Registration

Statement upon approval of the SWPPP in accordance with 9VAC25-880-

50. The CGP registration statement shall be signed in accordance with

9VAC25-880-70, Part III K of the General Permit Requirements.

2. Meet with the Public Works’ VSMP Administrator and submit the CGP

registration statement.

3. Pay the permit fees required for the CGP to VDEQ.

4. Provide the Owner a copy of the permit prior to commencement of any

construction related activities.

5. Ensure that all site personnel involved in construction related activities are

identified in and understand the requirements of the SWPPP.

6. Maintain a copy of the Contractor Certification Forms signed by all

subcontractors performing construction related activities prior to

commencement of construction in the SWPPP.


2

7. Ensure Qualified Personnel are authorized to recommend and implement

modifications to the SWPPP as required to ensure the effectiveness of

pollution prevention measures provided; all such changes must be

approved by the Owner in writing before implementation unless

immediate Contractor action is necessary to prevent unauthorized

discharges. If immediate Contractor action is necessary, the Contractor

shall notify the Owner as soon as practicable.

8. Ensure that all required inspections are conducted, maintenance and

corrective actions implemented, and document annotations made as

required by the SWPPP.

9. Install a rain gauge at the construction site to record rainfall.

10. Install a sign conspicuously posted near the main entrance of the

construction site containing a copy of the permit coverage letter and/or any

other required documents.

11. Immediately contact the Owner if a representative from the VDEQ or the

U.S. Environmental Protection Agency (USEPA) arrives on site for any

purpose.

12. Cooperate fully and completely with the VDEQ and/or the USEPA

representatives and make an immediate log entry of the inspection and the

results of such inspection.

B. Required Inspections

The Contractor shall perform inspections once every four business days; schedule

of inspections shall be communicated to Owner’s Inspector as early as practically

possible. Alternative inspection schedules shall not be acceptable.

The Contractor shall utilize the standard inspection checklist provided in the SWPPP when conducting and recording inspections. All corrective actions

required to prevent soil and suspended sediment loss from the site through

stormwater shall be noted on the plans.

C. System Maintenance and Corrective Actions

System maintenance and corrective actions for all deficiencies noted shall be

undertaken by the Contractor within 48 hours of completion of the required

inspections. All modifications necessary to increase the effectiveness of the

SWPPP shall be made within seven (7) days of discovery of the need for

increased effectiveness provided such modifications are approved by the Owner

in writing unless immediate Contractor action is necessary to prevent

unauthorized discharges. If immediate Contractor action is necessary to prevent

unauthorized discharges, then the Contractor shall notify the Owner of such

actions as soon as practicable. D. Disposition of Completed SWPPP

The Contractor shall provide a digital copy (.pdf) of the final completed SWPPP

to the Public Works’ VSMP Administrator upon completion of the project. The

Contractor will retain the original project SWPPP for a period of at least three


3

years after acceptance of the Notice of Termination.

E. Verification of Compliance

The Contractor shall make the SWPPP Field File and related documents available

to the Owner for review and confirmation of permit compliance for each

payment request for the project submitted to the Owner. If the project SWPPP

Field File is found to not be in compliance, the payment request shall be returned

to the Contractor and no payment will be approved by the Owner.


Full compliance with the SWPPP will not be measured separately and shall be considered

incidental to other pay items.


1


FOR

CONTRACTOR VIBRATION MONITORING AND CONTROL

PROGRAM (CVMCP)

1.0 Description:

This work shall consist of developing and implementing a Contractor Vibration

Monitoring and Control Program (CVMCP). The purpose of the CVMCP is to avoid

vibration related damages to adjacent structures and properties by monitoring vibrations

caused by construction activities including, but not limited to, pile driving, vibratory

pile and sheet driving, and other heavy construction equipment operation and to utilize

construction means and methods to keep vibration levels below approved threshold

levels. The CONTRACTOR remains responsible for any construction related damages

to adjacent structures and properties. The CONTRACTOR shall develop the CVMCP

and obtain approval of the CVMCP from the OWNER prior to beginning construction.

Upon approval of the CVMCP by the OWNER, the CONTRACTOR shall implement

the approved CVMCP.

2.0 General Requirements:

The general requirements for the CVMCP are as follows:

A. Be developed by the CONTRACTOR’s Vibration Control Specialist (VCS).

B. Be at least as stringent as the minimum Vibration Monitoring Control Program

technical requirements specified herein.

C. Be based on the CONTRACTOR’s proposed construction means and methods.

D. Be submitted and approved under the normal submittal approval process.

E. Include potential Zone of Influence for pre-construction structural condition

assessment. Structures will be designated for pre-construction condition

assessments. The property information, for these structures, will be provided to

the OWNER, so the OWNER can prepare correspondence to the property owners.

F. Include proposed measures CONTRACTOR will take if threshold vibration

levels are reached or exceeded.

G. Provide details on the following (but not limited to):

1. VCS Qualifications

2. Pre-Construction Structural Condition Assessment Plan

3. Pre-Construction Horizontal and Vertical Survey Plan


2

4. Crack and Vibration Monitoring process during construction

5. Location of crack and vibration monitors

6. Post-Construction Structural Condition Assessment

7. A map illustrating structures within the Zone of Influence

8. A list of structures susceptible to vibration damage

9. Threshold vibration levels for this project

10. Procedures to be employed if thresholds are exceeded

11. Procedures to be employed for detection of ground movement

3.0 Specific Requirements:

The specific requirements for the CVMCP are as follows:

A. Minimum Vibration Monitoring Control Program Technical Requirements are as

follows:

1. Zone of Influence for Vibration Impacts - A/E to fill in

2. Threshold Vibration Levels - A/E to fill in

3. Mitigation Procedures if Thresholds are Exceeded during Construction -

A/E to fill in

CONTRACTOR must develop his own technical requirements for his CVMCP,

however, they must be at least as stringent as the criteria shown above.

B. CONTRACTOR shall identify and assign a Vibration Control Specialist (VCS)

to formulate and execute the CVMCP. The VCS shall be a Professional

Engineer, licensed in the Commonwealth of Virginia, with a background in

geotechnical and structural engineering and shall have a minimum of 3 years of

demonstrated experience in vibration monitoring and related work. The

qualifications of the VCS shall be identified in the CVMCP.

C. Pre-Construction Structural Condition Assessment:

1. The CONTRACTOR shall retain a qualified engineering firm to

perform a pre-construction structural condition assessment to

document the conditions of nearby buildings and other sensitive nearby

s tructures prior to the beginning of construction. The pre-construction

structural condition assessment shall be performed on all properties

that could be affected by any construction activity due to, but not

limited to, vibration within the zone of influence, or as otherwise

defined in the approved CVMCP. The OWNER is responsible for


3

contacting the individual property owners and obtaining permission for

the CONTRACTOR to perform the pre-construction structural

condition assessments. The CONTRACTOR shall allow a minimum

of four (4) weeks from approval of the CVMCP until start of the

pre-construction structural condition assessment, to allow the

OWNER to obtain permission from property owners. With the

written approval of the property owner, the pre-construction structural

condition assessment shall include video and photographic

documentation of all exteriors and interiors including installation of

crack monitors on façade or interior cracks that might propagate due to

construction vibrations. All documentation of existing building

conditions and information concerning the type and location of crack

monitors shall be submitted to the OWNER in a pre-construction

structural condition assessment report prior to construction.

2. The inspection of each and every residence and building shall include

a detailed inspection of the condition of all walls, floors, ceilings and

other structural elements, equipment that may be in place, pavements,

sidewalks, wells, and other miscellaneous structures that may become

subject to possible damage claims. Such deficiencies as noted shall be

suitably marked on the structure in such a manner as not to

permanently deface such structures. The conditions shall be recorded

in permanent notes accompanied by sketches and colored photographs

as required to fully delineate the extent of deficiencies.

3. The results of these inspections shall be recorded in typed form,

accompanied by the sketches and photographs, and shall be signed by

those making the inspection. The CONTRACTOR should, where

possible, have a representative of the property owner present during

these inspections and should secure the signature of the representative

on the completed documents.

4. Upon acceptance of the pre-construction structural condition

assessments by the OWNER, the CONTRACTOR shall provide one

(1) copy to each impacted property owner who allowed permission

of the pre-construction structural condition assessment, for their

records, and three (3) copies of all assessments performed, to the

OWNER.

5. A pre-construction structural condition assessment report will be

prepared and include an evaluation to identify residential


4

structures and features susceptible to damage due to contractor

activities as justification for selecting specific locations to

monitor cracks and vibrations during the construction.

D. Pre-Construction Horizontal and Vertical Survey:

1. In order to detect any settlement or movement of buildings and

structures (such as swimming pools) that may be affected by his work,

the CONTRACTOR shall establish a system of vertical and horizontal

control points on or about buildings, structures and swimming pools as

identified within the zone of influence in the CVMCP, prior to

excavation, pile driving, vibratory driving or driving sheeting. These

control points shall be tied to the City’s horizontal and vertical

controls and should not conflict or be moved with the proposed

construction activities. The CONTRACTOR shall submit a copy of

this Survey Plan to the OWNER for review. The CONTRACTOR shall

engage these services from a Land Surveyor licensed in the

Commonwealth of Virginia. Readings shall be taken of these points

and permanently recorded prior to the start of excavation, pile driving or

vibratory driving. CONTRACTOR shall coordinate and obtain approval

for access onto private property to establish control points.

2. Control points shall be checked weekly or more often if necessary, by

Land Surveyor. Three copies of the original horizontal and vertical

control points log and subsequent readings shall be submitted on an

approved form to the OWNER within 48 hours after observations have

been made. Any settlement and/or horizontal movement detected,

exceeding ¼ inch, shall be reported immediately to the OWNER, as

shall any cracks, sags, or damage of any nature to affected properties

not noted in the original pre-construction survey. In the event of such

movement or damage, the CONTRACTOR shall take immediate

remedial action to halt further movement and repair damaged structures

and shall keep the OWNER informed of the results.

E. Crack Monitoring during Construction:

If deemed necessary as determined by the pre-construction structural condition

assessment, the CONTRACTOR shall install crack monitors at specific

locations identified. During construction, the CONTRACTOR shall perform

periodic readings of the crack monitors that were installed during the pre-

construction structural condition assessment. The frequency of the readings


5

shall be determined by the VCS and specified in the approved CVMCP. All

readings shall be provided to the OWNER within 48 hours of taking the

reading. Provided that the crack readings confirm that vibrations are not

contributing to increasing the crack width, the crack monitors may be read

once per week. More frequent readings may be necessary, as determined by

the VCS, during activities that are expected to have greater earthborn

vibrations or during periods where the groundwater is changing rapidly. If

the crack readings suggest that vibrations from the project site are

contributing to crack width, then the CONTRACTOR shall immediately

notify the OWNER and suspend those activities which are generating the

earthborn vibrations until the proper course of action has been determined by

the CONTRACTOR.

F. Vibration Monitoring during Construction:

1. Prior to construction, a plan of the vibration monitoring locations,

within the zone of influence, shall be submitted to the OWNER. The

locations of the vibration monitoring shall be selected by the

CONTRACTOR based on the properties surveyed in the pre-

construction structural condition assessment report and the

construction activities anticipated nearby. The CONTRACTOR shall

monitor vibrations at the locations selected, within the zone of

influence, during all construction activities. The locations of the

vibration monitors shall be adjusted during construction as necessary.

2. The vibration monitors shall be established at the site so that

background vibrations may be determined prior to beginning

construction. The sensitivity range of the seismograph shall be

selected so that the recording is initiated below the maximum

allowable particle velocity as specified by the ENGINEER and extends

above the highest expected intensity. Specific activities of the

vibration source shall be indexed in time to allow correlation with the

arrivals of the vibration.

3. The VCS shall be on the site during pile driving or vibratory driving

and at all other times that the specialist deems that significant or

damaging vibrations may result from the CONTRACTOR's

activities.

4. Project Vibration Criteria: The maximum allowable particle velocity

shall be identified in the approved CVMCP. If during construction, the


6

data from the monitors indicate that vibrations are close to or

exceeding the established criteria, then the CONTRACTOR shall

immediately notify the OWNER and suspend those activities which

are generating the vibrations until the proper course of action has been

determined by the CONTRACTOR.

5. Instrumentation: The vibration monitors shall consist of digital

seismographs that display the particle velocities and associated

frequencies plotted against the criteria for this project. Each

seismograph shall contain geophones with response capability in

three mutually perpendicular axes or components: one vertical and

two horizontal (radial and transverse). The frequency response of

the geophones shall be linear from at least 4 Hz to more than 200

Hz. The sensitivity shall range from less than 0.02 in/sec to more

than 5.0 in/sec. The BlastMate III by Instantel is one type of

seismograph that is suitable for this project however an equal can

be used if approved by the OWNER.

6. Calibration and Instrument Use: The CONTRACTOR shall field

calibrate the vibration monitors before the start of each recording

period. The transducer shall be positioned with longitudinal axis

toward the vibration source. Transducer must be adequately coupled

with the ground. Operation of all vibration monitors shall be in

accordance with the instrument manufacturer’s instructions and

recommendations. Vibration records shall be collected in waveform

plot or strip chart plot. The peak vector sum of the particle

velocity in longitudinal, transverse, and vertical planes shall be

shown along with the respective dominant or principle frequencies.

The highest recorded particle velocity (i.e., the vector sum of the

three orthogonal directions), when indexed to a particle vibration

event, shall be reported as the peak particle velocity. The recorded

peak particle velocity shall be compared to criteria appropriate for

the subject of concern.

7. Complaints: The CONTRACTOR is responsible for resolving all

vibration complaints. In the event of a complaint to the OWNER, the

OWNER shall contact the CONTRACTOR. The CONTRACTOR

shall investigate the complaint and prepare a report documenting all

relevant data such as the time and date presented in the complaint, a

description of the construction activities during the subject time/date,


7

data from the monitoring instruments for the subject time/date,

complaint information and a description (including photographs, if

possible) of the alleged damage. Provided the results of the complaint

report confirm that the vibrations induced by the CONTRACTOR are

not causing damage, the CONTRACTOR may continue all construction

operations. If the results of the complaint report show that readings

from the monitors indicate the vibrations are exceeding the established

criteria or are contributing to crack width, then the CONTRACTOR

shall take steps to modify the construction activity to achieve

acceptable readings. The OWNER will not extend the contract time or

reimburse the CONTRACTOR for delays resulting from resolution of

vibration complaints.

8. Notification of Exceeding Vibration Limits: The Contractor shall

employ a cellular phone notification method to notify the necessary

parties before the allowable vibration parameters are exceeded. Those

being notified shall be, but not limited to the OWNER’s inspectors,

CONTRACTOR's VCS, CONTRACTOR's Superintendent and

CONTRACTOR's representative authorized to make changes to

activity to remedy exceeding parameters.

G. Post-Construction Structural Condition Assessment:

1. Following completion of the work, the CONTRACTOR shall conduct

a post-construction inspection of all structures previously inspected

under the pre-construction structural condition assessment.

2. Documentation procedures shall be identical to those performed under

the pre-construction structural condition assessment. Changes or

deviations from the pre-construction structural condition assessment

in any structure shall be identified and described in the post-

construction structural condition assessment report.

3. Each property owner who allowed permission for the post-

construction structural condition assessment shall receive one copy

of the report. Three copies of the post-construction structural

condition assessment report shall be submitted to the OWNER for his

records.

4.0 Submittals:

CONTRACTOR shall submit the following elements of the CVMCP for approval:


8

A. Initial CVMCP including the following:

1. VCS Qualifications

2. Pre-Construction Structural Condition Assessment Plan

3. Pre-Construction Horizontal and Vertical Survey Plan

4. Crack and Vibration Monitoring process during construction

5. Post-Construction Structural Condition Assessment Plan

6. A map illustrating structures within the Zone of Influence

7. A list of structures susceptible to vibration damage

8. Threshold vibration levels for this project

9. Procedures to be employed if thresholds are exceeded

10. Procedures to be employed for detection of movement

B. Pre-Construction Structural Condition Assessment Report C. Pre-Construction Survey D. Field Test Reports E. Post-Construction Structural Condition Assessment Report


A. Payment for all CVMCP work shall be made at the lump sum price and

shall be full compensation for all tools, labor, materials, equipment,

documentation, and incidentals necessary to complete the work. Payment

will be made in accordance with percentages of the lump sum bid item per

the following schedule. The CONTRACTOR is responsible for determining

appropriate order of activities.

1. 10% Evaluation

• Approval of CVMCP 2. 25 % Pre-Construction/Existing Condition Documentation

• Submission of Pre-Construction Structure Condition Assessment

Report

• Submission of Pre-Construction Horizontal and Vertical Survey

• Submission of Documentation of Existing Conditions

3. 50% Monitoring and Control (arrive at monthly basis for invoice)

Submission of Field Test Reports

4. 15% Post-Construction

Submission of Post-Construction Structure Condition Assessment

Report

Demobilization of Vibration facilities

Payment will be made under:


9

Pay Item Pay Unit

Contractor Vibration Monitoring & Control Program L.S.

Last Revised January 28, 2019

1


FOR

POLLUTION PREVENTION

Effective Date: February 1, 2019

1.0 Description:

This Pollution Prevention Specification (P2) is intended to control pollutant discharge on the

project site by combinations of interception, filtration, and containment. The procedures

contained herein specify the requirements that the Contractor and all subcontractors involved

in construction related activities shall follow to ensure that the P2 for this project is adhered to

in accordance with 9VAC25-870-56 of the Virginia Stormwater Management Program

Regulation and as specified in 40 CFR 450.21 (d) of the Federal Regulations.

This Pollution Prevention Specification is required for all projects that are exempt from

obtaining Construction General Permit or are not required to prepare a Stormwater Pollution

Prevention Plan in accordance with 9VAC25-870-10 et seq.

2.0 P2 Compliance Procedures:

A. Contractor Review and Acknowledgment of P2:

The Contractor shall:

1. Ensure that all site personnel involved in construction related activities

understand and adhere to the requirements of the P2.

2. Maintain a copy of this P2 in a central location accessible by all personnel on

the site.

B. Pollution Prevention Specification Requirements:

1. Dust Control – Construction traffic shall enter and exit the site at the stabilized

construction entrance. The purpose is to trap dust and mud that would

otherwise be carried off-site by construction traffic.

Dust control shall be provided by the Contractor in compliance with applicable

local, state, and federal dust control regulations. Both during and at the

completion of construction activities the site shall be stabilized (per the E&S

plan) to reduce the potential for dust generation.

2. Effluent from de-watering activities shall be filtered or passed through an

approved sediment trapping device, or both, before being discharged from the

site. No contaminated effluent or groundwater may be discharged to state

waters or wetlands or the Owner’s storm drain system without a separate

VPDES discharge permit from the Virginia Department of Environmental

Quality (VDEQ). Such permit shall be obtained by the Owner, or if directed by

the Owner shall be obtained by the Contractor prior to discharge.

3. Dewatering to Sanitary Sewer – No dewatering effluent may be discharged to


2

the sanitary system by the Contractor without prior written authorization of

both the Owner and the Hampton Roads Sanitation District (HRSD). The

Owner will obtain required approvals from the HRSD, or if directed by the

Owner, the Contractor shall obtain required approvals from HRSD, prior to any

discharge to the sanitary sewer system. The Contractor is responsible for

complying with all effluent and/or flow limitations contained in any permits

secured relating to dewatering discharges.

4. Solid Waste Disposal – Solid materials, including building materials, shall not

be discharged from the site. All solid wastes, including disposable materials

incidental to the major construction activities, shall be collected, removed from

the site, and properly disposed of by the Contractor. Solid waste shall be

protected from coming into contact with stormwater by closing or covering

waste containers during precipitation events and at the end of the business day.

All stormwater runoff coming into contact with waste shall be properly

managed to ensure that pollutants do not leave the site with runoff.

5. Sanitary Facilities – All personnel involved with construction activities shall

comply with state and local sanitary and septic system regulations. Temporary

sanitary facilities, if provided, shall be utilized by all construction personnel

and shall be serviced by a commercial operator.

6. Water Source – Non stormwater components of site discharge shall be clean

water. Water used for construction which discharges from the site shall

originate from a public water supply or private well approved by the Virginia

Department of Health. Water used for construction that does not originate from

an approved public supply shall not discharge from the site. It shall be retained

in ponds until it infiltrates and/or evaporates.

7. Material resulting from clearing and grubbing shall be stockpiled up slope from

adequate sedimentation controls or hauled off-site.

8. All soil stockpile areas shall be maintained sufficiently far from water bodies,

wetlands, stormwater inlets, and stormwater conveyances to minimize sediment

release to these features and shall be protected from erosion in accordance with

Virginia Erosion and Sediment Control Minimum Standard 2 to preclude

migration of sediments into these features.

9. The Contractor shall designate areas for equipment cleaning, maintenance, and

repair. These areas shall be protected by a temporary perimeter berm or filter

fabric.

10. Use of detergents for large scale washing is prohibited (e.g., vehicles,

buildings, pavement surfaces, etc.)

11. Chemicals, paints, solvents, fertilizers, and other toxic material shall be stored

in waterproof containers. Except during working hours, the contents shall be

kept locked in trucks or within locked storage facilities. Runoff containing

such material shall be collected, removed from the site, treated, and disposed at

an approved solid waste or chemical disposal facility. The Contractor shall

maintain a list of all of the chemicals on the Construction site and shall update

the list as additional chemicals are brought onto the site during the entire term

of site construction activities.

12. Fuel - At the end of each work day all on-site fuel tanks shall have fill ports and

hose nozzles secured by a lock. No key for this lock shall be left onsite except

when secured in another locked container or facility. Each fuel tank shall be of


3

double walled construction or placed in a containment basin designed to hold

110% of the contents of the tank, or both, and shall have spill cleanup materials

accessible to personnel.

13. Water used to remove cementitious materials from surfaces (such as the

washout of concrete trucks, washing of concrete or masonry tools, mortar pans,

etc.) shall not discharge from the site. This water shall be collected in a leak

proof container(s) and either allowed to evaporate or be hauled off site and

disposed of properly by the Contractor. The Contractor shall take all steps

necessary to prevent these containers from overflowing from rainfall.

Hardened concrete or mortar residue shall be managed as a solid waste and

disposed of in accordance with local, State and Federal requirements.

14. Unused wet concrete shall not be dumped on bare ground to harden at

construction sites because this can contribute to ground water and surface water

contamination. Contractor shall either provide an excess concrete pit with leak-

proof bottom protection (separate from the concrete washout pit), or dump the

excess concrete on impervious surface and allow to harden so it can be crushed

and recycled as aggregate.

C. Spill Response Activities:

Discharge and/or spill of petroleum, oil, lubricants or other hazardous substances are

subject to reporting and cleanup requirements. In general, all petroleum, oil, lubricants

or other hazardous substances spilled on site shall be cleaned up and disposed of by the

Contractor in accordance with State and Federal regulations. Spills of solid materials

(powders, mixes, granules) shall be cleaned up, placed in a sealed container and

disposed of in accordance with State and Federal regulations. All costs associated with

the cleanup and disposal of solid materials shall be borne by the Contractor.

For liquid spills of less than 25 gallons, the Contractor shall notify the Owner

immediately and shall clean up the spilled material completely. Liquid spills may

include petroleum, oil, lubricants, soaps, solvents, detergents, paints, or other

prohibited discharges to the storm sewer as defined in Appendix H of the City of

Virginia Beach Code of Ordinances. The Contractor shall be responsible for all costs

associated with required clean-up activities including disposal costs.

For liquid spills of 25 gallons or more of petroleum, oil, lubricants, or other hazardous

substances, the Contractor shall notify the Owner immediately and shall clean up the

spilled material completely. The Contractor will notify VDEQ within 24 hours of the

discovery of the spill. The Contractor shall be responsible for all costs associated with

required cleanup activities including disposal costs.

For all spills, the Contractor shall provide VDEQ and the Owner with all information

requested regarding the spill event and shall cooperate fully with all site inspections by

the Owner and/or other regulatory agencies. The Contractor shall contact the Owner to

develop measures to prevent reoccurrence of any spill. For spills of any amount of

petroleum, oil, lubricants or other hazardous substances to the storm sewer system or to

state waters or wetlands, the Contractor shall notify the Owner immediately and take

such measures as necessary to immediately stop the discharge of the material to the

storm sewer system, state waters or wetlands. The Contractor shall notify VDEQ


4

within 24 hours of the occurrence of the spill. The Contractor shall provide all

equipment and manpower required to clean up any spilled material. The Contractor

shall provide the Owner with all information regarding the spill event and shall

cooperate fully with the Owner and/or other regulatory agencies during and after

cleanup activities. The Contractor shall report to the Owner the estimated amount and

type of substance spilled, how the spill was cleaned up and where the material was

disposed.

To notify VDEQ of a spill, call the Pollution Reporting and Environmental Response

(PREP) number (757) 518-2077.

3.0 Failure to Comply

Failure to comply with these contract requirements will result in non-acceptance of

Construction Estimates (pay requests) and an immediate halt to any payments currently being

processed. If there are any unresolved notices of non-compliance outstanding on the project all

payment requests shall be returned to the Contractor and no payment will be approved by the

Owner until the Project is brought into compliance with these requirements.


Compliance with this specification is not measured separately and shall be considered

incidental to other pay items.


1


FOR

UNDERGROUND SEWER SERVICE LATERAL TRACER WIRE

1.0 Description

Copper tracer wire shall be installed with all sanitary sewer lateral services. The

wire shall extend from the mainline wye along the centerline of the lateral pipe and

terminate at the cleanout. The wire shall be fastened to the lateral pipe and

cleanout with stainless steel bands or plastic wire ties.

2.0 Material

Wire must be UL listed and suitable for direct burial with plastic pipe to facilitate

detection and tracing of underground sanitary sewer lateral piping. The wire must

be AWG 10 solid copper with green polyethylene insulation, and must be resistant

to moisture, chemicals, oil, impact, crush and abrasion.

3.0 Wire Specification:

Conductor – Solid copper per ASTM B-3

Insulation – Polyethylene

Temperature – 60° C dry and wet

Voltage – 600 volts


Payment will not be measured separately and shall be considered incidental to cost

of each installed sanitary sewer lateral that will include all materials, labor, tools,

equipment and incidentals necessary to complete the work.