PROJECT STATEMENT OF WORK Boeing BCA Everett Plant Powder Mill Gulch Downgradient Plume Interim Action, Phase 1 Boeing Environment, Health and Safety (EHS) Remediation Group Seattle, WA

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Nov 25, 2013 (3 years and 11 months ago)

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PROJECT
STATEMENT OF WORK


Boeing

BCA

Everett Plant

Powder Mill Gulch Downgradient Plume Interim Action, Phase 1


Boeing

Environment, Health and

Safety (EHS)
Remediation Group

Seattle, WA





CONTENTS












I.

Project Background

II.

General Project Requirements

II
I
.

General

Tasks, Requirements, and Submittals

I
V
.

Scope of Work

V.

Technical Specifications


A
ttachment 1



Project Plans


Statement of Work


i


PMG Phase 1 Interim Action




PROJECT
CONTACTS



Boeing (Owner)


Boeing
Project Manager:


Nick Garson


425
-
269
-
7866





nick.garson@boeing.com


Boeing
Everett Plant Contact:

Alan Sugino


425
-
717
-
6117





alan.k.sugino@boeing.com



Boeing Field Manager


Dan McCormack


206
-
290
-
6558



daniel.c.mccormack@boeing.com


Contract Management/

Procurement Agent:

Meredith Plumb



425
-
237
-
4865





Meredith.G.Plumb@boeing.com



Landau Associates (Owner’s Representative)






Engineer

(
Landau
Associate
s
):


Piper Roelen
, P.E.

425
-
778
-
0907



425
-
503
-
6784 mobile


proelen@landauinc.com



Biologist (
Landau Associate
s
):


Steve
n

Quarterman

425
-
778
-
0907



squarterman@landauinc.com




Environmental
Project Manager

(
Landau Associates
)
:

Jerry Ninteman
, P.E.

425
-
778
-
0907



206
-
850
-
4503 mobile


jninteman@landauinc.com









Statement of Work

I
-

1


PMG Phase 1 Interim Action


I. PROJECT BACKGROUND



The Boeing Commercial Airplanes (BCA) plant in Everett, Washington is used for the
manufacture of 747, 767,
777
,

and 7
8
7 aircraft. Primary construction began in 196
8
and was completed in 1969.
Additional building and facilities have been constructed
since then.
The head of Powder Mill Gulch (PMG) is located on the northern end of the
Everett Plant property.


Tricholoroethylene (
TCE
)

was first detected in PMG groundwater in March 2003 with
the installation and sampling of monitoring well EGW075. A phased remedial
investigation has been conducted to characterize the nature and extent of the
groundwater plume
and discharge of contaminated groundwater to surface water in
Powder Mill Creek.


Based on initial site characterization activities, the TCE source area was identified as an
approximately 14,000 square foot (ft
2
) area centered below the deepest portion of
a
detention basin at the head of PMG. TCE concentrations in the source area were
historically
measured as high as 31,000

micrograms per liter (μg/L). An
interim action
(
IA
)

was completed in 2008 within the source area using
in situ

electrical resistance
heating (ERH) to reduce TCE concentrations in the source area.

The objective of the
source area IA was to reduce concentrations
of TCE in groundwater
to below an
established remediation level of 500
μg/L
. The objective was achieved through most,
but not
all of the source area through the ERH application. More recent application of
contingent and focused bioremediation appears to have successfully achieved the IA
objective throughout the source area.


The TCE groundwater plume in PMG extends
north
-
northeast from the stormwater
detention basin. A portion of the plume discharges to Powder Mill Creek approximately
500

ft north of the detention basin where Powder Mill Creek becomes a perennial
gaining stream. The plume continues northward beneat
h Seaway Boulevard

(which
bounds the northern edge of Boeing property)
;

onto City of Everett Lot 9, Intermec, and
CRISTA Ministries properties
;

and
,

ultimately
,

discharges to Powder Mill Creek at the
toe of the plume, beginning approximately 1,000 ft north
-
northeast of Seaway
Boulevard
.


The plume, defined by TCE concentrations in groundwater greater than the
project screening level of 0.49 μg/L, is approximately 2,850 ft in length. TCE has been
measured in groundwater at concentrations as high
as
2,000 μg
/L at wells near Seaway
Boulevard, and 1,900 μg/L north of Seaway Boulevard.


The plume is present primarily in the upper portion of the Esperance Sand Aquifer, at
depths of 4

to 75 ft below ground surface (BGS). A 4
-
ft
-
thick silt layer within the
Esperan
ce Sand Aquifer is relatively continuous over the length of the plume and
serves as a barrier to deeper vertical migration of TCE in the source zone and over
most of the downgradient dissolved
-
phase plume. A relatively impermeable Lawton
Clay unit is pres
ent approximately 30 ft below the silt.


Sampling in Powder Mill Creek and from seeps on the banks and hillsides above the
creek have identified concentrations of TCE in Powder Mill Creek up to 38 µg/L (south
of Seaway Boulevard)

and in seeps up to 530 µg/L (near the toe of the plume).

Statement of Work

I
-
2


PMG Phase 1 Interim Action





Boeing has agreed to perform a downgradient plume IA

to address various elements of
contamination in groundwater and surface water
.
This IA is being performed under the
authority and conditions of

Amendment No. 5 to Agreed Order No. DE96HS
-
N274
(Order
; Exhibit A1 in
Attachment 1



Project Plans
) between The Boeing Company and
the Washington State Department of Ecology (Ecology).
The downgradient plume IA
will include two phases of work
: the first

on Boeing property,
referred to as the
“PMG
Downgradient Plume Phase 1 IA” (
Phase 1 IA)
; and

the second off Boeing property
referred to as the
“PMG Downgradient Plume Phase 2 IA” (
Phase 2 IA).


This SOW pertains solely to the Phase 1 IA being conducted
on Boeing property.
This

Phase 1

IA is being conducted to prevent further migration of TCE off of Boeing
property and reduce discharge of TCE into Powder Mill Creek through construction and
operation of a groundwater extraction and treatment (GET) system. The GET system
involves pumping

groundwater from extraction wells to create a capture zone to control
the migration of TCE
-
contaminated groundwater, treating the groundwater through air
stripping of aqueous
-
phase volatile organic compounds (VOCs), and discharging
treated groundwater to
the
c
ity of Everett (City) sanitary sewer system
.
Vapor
-
phase
TCE discharged from the air stripper will be treated through granular activated carbon
(GAC).



Statement of Work

II
-

1


PMG Phase 1 Interim Action


II
.
GENERAL PROJECT REQUIREMENTS



Upon award of this work, the Contractor shall enter into a binding agreement (Contract)
with Boeing (Owner) which shall specify the terms and conditions upon which
performance of the Work, specified herein, shall

be performed
.

This section provides general
project r
equirements that shall be observed by the
Contractor during performance of work for the duration of the Contract.


AGREED ORDER

Upon award of this contract, a copy of the Order and Amendment No. 5 will

be provided
to the Contractor.

Contractor is required to provide copies of the Agreed Order to
subcontractors
,

and
to
provide documentation of this
to

Owner
.



CONDUCT OF WORK

Coordination

B
efore starting Work,

Contractor shall identify

to
Owner

and Engineer

an authorized
representative who shall have complete authority to represent and to act for Contractor.
The authorized representative shall be present at
the work site at all times while w
ork is
actually in progress or shall have designated an

alternate
when not present
.

The
authorized representative shall not be removed from the project without
notification to
Owner

and Engineer
.

Coordination with facility staff
, site tenants, property owner representatives
, and other
on
site contractors shall

be made by Contractor through
Owner
’s onsite representative to
assist Contractor with performance of the work with a minimum of interference and
inconvenience.


Work Hours

Standard work
hours are 6:30 a
.
m
.

to
5:00

p
.
m
.
, Monday

through Friday. Contractor
may propose alternative work schedules
;

however,
the

proposed work schedule may
not be approved if
Owner
’s
r
epresent
ative is not available to be on
site during the
proposed work hours.


Regulatory Requirements

Contractor is
responsible for determining requirements and complying with local, state,
and federal laws, regulations
,

and permits
that

govern the Work.


The Contractor shall
be
aware of applicable or relevant and appropriate requirements for the Work, shall
determine t
he relevance of the regulations to executing the Work in this Contract, and
shall comply with all applicable requirements of the regulations in performing the Work.





Statement of Work

II
-

2


PMG Phase 1 Interim Action




Sustainable Remediation Practices

The Boeing
Company is committed to

identify
ing

clean
up pro
ject

opportunities to use
natural resources and energy efficiently, reduce negative impacts to the environment,
minimize or eliminate pollution at its source, reduce waste to the greatest extent
possible and stay abreast of policy, technology and ind
ustry standards associated with
sustainable practices. This concept of
sustainable remediation (SR) can be
defined as
a remedy or combination of remedies whose net benefit on human health and the
environment is maximized through the judicious use of limit
ed resources
.

SR
incorporates sustainable environmental practices into remediation of contaminated sites
to increase the environmental, economic and social benefits of a cleanup.
This
commitment includes

using the contracting process to select suppliers who share
Boeing’s

commitment to SR principles
so that

remediation work
can be performed
in a
way that reduces

adverse

impacts to the

environment.


The following
summar
izes

SR principles

that
the
Contracto
r shall consider and
incorporate as reasonably
feasible and
applicable
during performance of
the SOW
described herein.

Where appropriate, these principals are incorporated into the design
plans and technical specifications.


Summary of SR
P
rinciples and
O
bjectives


Contractor

will consider the “triple bottom line”
for performance of this SOW
, including
incorporation of

efficient, low
-
impact
work practices, procedures, and
operations
; and
use of
sustainable materials and products
. It is the goal of
Boeing’s sustainable
remediation program to implement the following objectives in each project to the
greatest extent possible:


Environmental

-

Consider environmental effects of remedy implementation and
incorporate options to minimize the environmental f
ootprints of a cleanup and conserve
natural resources
.


Economic

-

Integrate sustainable practices throughout a remediation project’s life cycle,
evaluate return on investment
.


Social

-


Partner with Boeing business units, regulatory agencies, the public
and other
stakeholders to identify environmental, land use, health and safety aspects, and
economic goals in all phases of remediation projects to develop sustainable remedial
alternatives and select final remedies
.



Core Elements


Sustainable practices
emphasize the need to more closely evaluate core elements of a
cleanup project; compare the site
-
specific value of conservation benefits gained by
different SR strategies; and weigh the environmental trade
-
offs of potential strategies.
Sustainable Remedia
tion addresses five core elements:


Energy



Promote efficiency and renewable sources
.


Statement of Work

II
-

3


PMG Phase 1 Interim Action




Air



Reduce air emissions
.


Water



Reduce, reuse and protect
.


Land and Ecosystems




Minimize harm, protect and foster return to ecological,
economic, social or othe
r uses
.


Materials and Waste



Reduce, reuse, recycle; use environmentally responsible
products
.



GENERAL ACCESS REQUIREMENTS

The project site
area is within
Boeing property but outside
the
secur
ity

fence

of the

main

facility, and Boeing
-
provided badges are required for access. The project site area is
periodically patrolled by Boeing’s security details and security

personnel may query
personnel working at the site and ask for identification issued by Boeing. The si
te is
fenced

with a locked gate at Seaway Boulevard. Contractor shall provide a padlock to
be daisy
-
chained with Boeing locks
.

Contractor shall ensure that the gate is locked at
the end of each work day.


Irregular or Non
-
Routine Access

Access on an irre
gular basis and during other than established working hours will
require prior approval by
Owner
.


Maintenance of Access

Contractor shall not obstruct or interfere with access by others to existing facilities
adjacent to the project site during the work
under this Contract.



Vehicle Parking
/Idling

Contractor’s vehicles shall only park in approved areas.

Idling of vehicles and heavy
equipment will be limited to 10 minutes or less, excluding daily initial equipment
startup/warm up.



COORDINATION AND COO
PERATION WITH OTHER CONTRACTORS

Work by others may be performed in the vicinity of or adjacent to the project site in
concurrence with the scheduled performance of the Work under this SOW. Contractor
shall coordinate construction work with those other con
tractors to minimize conflicts and
to maintain a cooperative effort in completion of the Work.



CONSTRUCTION SCHEDULE REQUIREMENTS

Work Flow

The work shall be planned, scheduled, and performed to complete the Work within the
requirements of this SOW.

Contractor shall prepare and maintain a construction
Statement of Work

II
-

4


PMG Phase 1 Interim Action




schedule.

System startup and full scale operation (i.e., after completion of system
testing) shall be on or before August 1, 2012. Work shall be substantially completed by
October 30, 2012.

Owner

may

choose to extend this deadline due to circumstances
such as weather

or extended Ecology or City review periods
.


Schedule Constraints

The following special constraints have been identified as having an impact on the
performance of the work. It is not
intended to be a comprehensive list of constraints
that will result from the execution of the work, but as an aid to Contractor in
development of schedules and in executing the work. Additional constraints may exist
or develop as a result of required work

execution or Contractor’s proposed work
methods or sequence. In any event, Contractor is responsible for compliance with the
requirements of the various specification sections and the work procedures and
protection requirements contained therein, and est
ablishing all constraints associated
with the work execution and incorporating them into work schedules and proposed
construction activities.

Weather events may prevent the Contractor from performing work on certain days
because of water
entering trench

or

difficulty controlling surface water flows
, or erosion
to wetlands or surface water bodies
.

At the end of work, Contractor’s too
ls and equipment must remain on
site until
Owner/Engineer

performs final inspection and
gives approval for Contractor to
demob
ilize.



PROTECTION OF PROPERTY

Contractor shall protect all property within or in the vicinity of the work site.


Contractor
shall ensure that it is not removed, damaged, destroyed, or prevented from its normal
use unless so designated in the SOW. All property adjacent to the work shall be
protected including, but not be limited to, protecti
on from construction
-
gene
rated dust,
debris, water, and vibration. Property includes land, utilities, landscaping, markers and
monuments, monitoring wells, buildings, structures, site and drainage improvements,
and other improvements, whether shown on the Drawings or not. No wor
k sha
ll be
conducted in any wetlands or wetland buffer zone, or in the creek or creek buffer zone

(
shown on the
Construction
Drawings
)

unless
specifically identified in the Construction
Drawings or this scope of work
.


No work, including the staging of equ
ipment or supplies
or any land disturbing activity, shall occur outside the limits shown in the Construction
Drawings.

No work shall be conducted in

restricted areas

of the site unless coordinated
and approved by
Owner
.

Contractor shall perform a utility
locate at least 48 hours prior to any below grade
excavation work.

Contractor shall be responsible for any damages to existing utilities
that are damaged by the Contractor’s work, whether or not those utilities are identified
on the Drawings.

All utiliti
es that are damaged shall be repaired and restored to their
original operation at expense of Contractor.


Statement of Work

II
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PMG Phase 1 Interim Action





SPILLS

AND HAZARDOUS MATERIALS

In the event of a spill or release of a hazardous substance (as designated in 40 CFR
302), pollutant, contaminant, or

oil (as governed by the Oil Pollution Act [OPA], 33 USC
2701 et

seq.), Contractor shall notify Boeing immediately
.

Immediate containment
actions shall be taken to minimize the effect of any spills or leaks. Cleanup shall be in
accordance with applicable

federal, state, and local regulations. As directed by Boeing,
additional sampling and testing shall be performed to verify
that
spills have been
cleaned up. Spill cleanup and testing shall be done at no additional cost to Boeing.


The project shall not use mercury, crystalline silica, lead, cadmium, asbestos, chromium
or radioactive material without prior written approval from the Owner. Please note that
products labeled as “non
-
asbestos” may contain asbestos as a minor ingredient
and are
not allowed in this project.




RESPONSIBILITIES

In addition to the requirements previously or subsequently indicated in this document,
the Contractor is responsible for the following:




Completion of the project per the
construction schedule
.
System startup and full
scale operation shall be on or before August 1, 2012.

Substantial completion of
construction is required by no later than October 30, 2012
.



Providing all labor, equipment, materials, personnel transportation, supervision,
and mana
gement required to complete the scope of work, including field office,
temporary facilities (e.g., portable toilet, lighting),
environmental protection,
site
control and traffic control, grading, trenching, e
xcavation,
utility installation, soil
handling a
nd dewatering on
site,
erosion and sediment control,
hauling and
disposal of non
-
contaminated soil and
clearing/grubbing

debris to designated

disposal/recycling facilities, outfall construction, and general system construction.



Providing qualified and appro
priately trained personnel to complete the scope
and comply with the requirements described herein and/or required by law.
A
ll
site workers
that may come in contact with hazardous materials contained in site
groundwater
must have current 40
-
hour HAZWOPER
training in order to work
onsite and the requirement that a HAZWOPER supervisor be available at all
times when work is occurring at the site.



Providing appropriate personal protective equipment (PPE) for all employees.
Contact with contaminated media is n
ot anticipated during construction; however,
contaminated groundwater is present beneath the site; therefore, f
or bidding
purposes, assume modified Level “D” PPE (including gloves, Tyveks, and
booties)
may be necessary
for persons
performing dewatering tas
ks or
entering
excavations
that come in contact with groundwater
.



Appropriatel
y managing storm
water flows,
impl
ementing
Best Management
Practices (
BMPs
)

for environmental and sediment and erosion control
protection,
and performing

associated

monitoring.

Statement of Work

II
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PMG Phase 1 Interim Action






M
aintaining all equipment in good working order.



Installing appropriate traffic control measures and barricades around work areas
accessible to the public
including signs.


If necessary, develop traffic control plan
for submission to the City, or other appropriate agency.



Cooperating with and supporting
Owner
’s site representative
s
.



Maintain spill clean
-
up supplies such as absorbent pads and booms in
appropriate quantities a
nd at appropriate locations in the work site.




Maintaining records and noting deviations from the Construction Drawings to aid
and assist with preparation of post
-
construction as
-
built drawings.

Owner

will be responsible for the following:



Obtaining enviro
nmentally related permits as indicated
below
.



Providing access to the work site (and escorts
,

as necessary) during normal
working hours.



Providing construction oversight to ensure compliance with construction
provisions and monitoring for potentially hazar
dous conditions related to site
contamination.



Preparation of reports for submittal to Ecology.



Installation of extraction wells per Washington well installation regulations
(borings and well casings completed to ground surface only; i.e., well vaults,
pumps, etc. are Contractor’s responsibility)
.

Statement of Work

III
-

1


PMG Phase 1 Interim Action


II
I
.
GENERAL

TASKS, REQUIREMENTS, AND SUBMITTALS


The following required elements of the project shall be followed or completed prior to
performance of field activities:



PERMITTING

For this work,
Owner

is obtaining a

sanitary sewer discharge authorization

from
the
City

and a Critical Areas Work Authorization from the City.


Contractor shall be responsible
for
complying with applicable permit conditions associated with this scope of work.

Contractor shall
apply for and obtain all other necessary
and applicable
loc
al, state, and
federal
permits for completion of the
work

described herein (e.g., building permit, public
works permit
,

side sewer permit,

right
-
of
-
way permit
) including associated submittals.


Contractor shall d
etermine what permits are required, apply fo
r permits in a timely
manner, diligently pursue securing permits, and comply with any stipulations in the
permits.

Contractor may request assistance, as necessary, from the Owner or
Engineer, but
,

in all cases
,

shall be responsible for obtaining permits.

Verbally notify the
Engineer as soon as possible and provide immediate written notification to the Engineer
in the event that a permit cannot be obtained or will likely be obtained with agency
stipulations that significantly affect the performance and cos
t of the work.



UTILITY CONNECTIONS

Contractor shall be responsible for arranging and coordinating with the local power
,

telecommunications
, and sewer

companies
/utilities district

for

appropriate connections

and supplying certain

applicable

equipment and services

to allow for hookup of such as
needed for the treatment system
.


Electrical

-


Contractor shall be responsible for supplying and install
ing

all electrical
conduit

and

junction boxes

from

the electrical tap point north of Seaway Boul
evard
(including horizontal boring beneath Seaway Boulevard to tap point) as indicated in the
Construction Drawings and Utility Company Drawings and Designs. Snohomish County
PUD will provide and install
the primary metering cabinet, two transformers, and
electrical cable into Contractor install
ed

conduit from

tap point to the primary metering
cabinet south of Seaway Boulevard

and from the primary metering cabinet to the
transformers
. Contractor shall be responsible for supplying wiring/cable beyond the
transformers.


Telecommunication

-

Contractor shall coordinate with local telecommunications
company to provide appropriate connection point at the entry to the site along Seaway
Boulevard. T
elecommunications connection shall be made
at
the identified con
nection
point

along Seaway Boulevard
and as indicated in the Construction Drawings

or Utility
Company Drawings and Designs

.

Contractor shall install all communication line
conduit and wiring from the connection point to the treatment system building and
associated equipment and control systems per the Construction Drawings.


Statement of Work

lII
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PMG Phase 1 Interim Action




Sewer

-

Side sewer connection shall be made at and from the identified connection
points along the City sanitary sewer line
,

including
appropriate connections
, piping,

and
structures
,

as indicated in the Construction Drawings
,

to allow for hookup of such
,

as
,

to
and from
the treatment system.



EROSION AND SEDIMENT CONTROL

C
overage under the Washington Construction Stormwater General Permit
is
not
required for this project

due to the
l
imited area of land that will be disturbed during
construction
. However
, the project is located adjacent to sensitive
areas (i.e., Powder
Mill Creek
,

designated jurisdictional wetland
,

and associated
creek and wetland
buffer
zone
s
)
.


Therefore,
Contracto
r shall implement and maintain
appropriate
Temporary
Erosion and Sediment Control
(TESC)
measures

and best management practices
, as
prescribed in the Stormwater Management Manual for Western Washington (2005)
, the
City of Everett Stormwater Management
Manual,

and

as shown on
Drawing

C
-
3

in all
areas disturbed by construction activities
.
Contractor shall also take
appropriate

measures to
prevent trackout of dirt onto public roads
, including construction of a
suitable construction entrance at the
site

en
trance at Seaway Boulevard and street
cleaning
,

as needed
. All loads of
soil

or aggregate shall be covered for transport to or
from the site.


HEALTH AND SAFETY

Site w
ork
shall

be performed in accordance
applicable state and federal occupational
health and safety regulations. Contractor shall prepare and comply
with a health a
safety plan that is at least as stringent as the project health and safety plan (Landau
Associates 2005).



SUBMITTALS

Submittal

Requirements

Two copies of each submittal will be provided by Contractor.
All submittals furnished
formally shall bear a Contractor’s approval stamp or a certification.

The stamp or
certification shall be signed by an authorized representative of the Co
ntractor.

The
Contractor’s stamp or certification on any submittals shall constitute a representation to
the Owner and the Engineer that the Contractor has either determined and verified all
quantities, dimensions, field construction criteria, materials,
catalog numbers and similar
data, or that it assumes full responsibility for doing so, and that it has reviewed or
coordinated each submittal with the requirements of the Contract Documents.

Each submittal shall be accompanied by a transmittal letter
that

describes the items
submitted.

The transmittal letter shall be clearly labeled “
Phase 1 IA



Boeing
/
PMG

Site” and shall have a submittal number.

The first submittal shall have submittal number
001, and subsequent submittals shall be consecutively numbere
d.

The initial version of
the submittal shall be identified as “Revision 0,” and subsequent submittals shall be
numbered consecutively starting with “Revision 1.”

All submittals shall be addressed to the Engineer at the following address:

Statement of Work

lII
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PMG Phase 1 Interim Action




Landau Associates

130 2nd Avenue South

Edmonds, WA 98020

Attention: Mr.
Piper Roelen
, P.E.,
Associate
.

Electronic submittals may b
e sent via electronic mail to:

proelen@landauinc.com





Submittal Review

Af
ter review of each of Contractor’s submittals, the material will be returned to
Contractor marked as follows:

1.

“No Exceptions Taken.”


Accepted subject to its compatibility with future
submittals and additional partial submittals for portions of Work not co
vered in
this submittal.

Does not constitute approval or deletion of specified or required
items not shown in the partial submittal.

2.

“Make Corrections Noted” (No Resubmittals Required).

Same as Item 1, except
that minor corrections as noted shall be made

by Contractor.

3.

“Amend and Resubmit.”

Rejected because of major inconsistencies or errors.
Resolve or correct before next submittal.

4.

“Rejected
-
Resubmit.”

Submitted material does not conform to the Contract
Documents in a major respect (i.e., wrong size,
model, capacity, or material).

Within 5 days of receipt of Shop Drawings or manufacturer’s data, the Engineer will
return one copy of each drawing and/or data sheet marked to indicate the result of the
Engineer’s review.

Copies marked “No Exceptions Taken”

or “Make Corrections Noted” authorize the
Contractor to proceed with construction covered by those Drawings or data sheets with
corrections, if any, incorporated.

No revision in any way shall be made after a Drawing
has been marked “No Exceptions Taken”
without resubmitting the Drawing for review.

When prints of Drawings have been marked “Amend and Resubmit” or “Rejected
-
Resubmit,” the Contractor shall make the necessary corrections and submit required
copies.


Every revision shall be shown by number, dat
e,
and subject in a revision block

and
,

in addition, each revised Drawing shall have its latest revision numbers and items
clearly indicated by clouding around the revised areas on the Drawing.

Drawings
submitted without these indications will be consider
ed nonconforming and will be
returned to the Contractor without review.

The applicable parts of the requirements specified above for Drawings shall apply
equally to design data, catalog cuts, illustrations, printed specifications, draft reports, or
any oth
er submittal furnished for review.


Specific Project Submittals

The following shall be submitted prior to commencement of construction:


Statement of Work

lII
-

4


PMG Phase 1 Interim Action




Health and Safety Plan

Within 10 calendar days following notice to proceed, Contractor shall submit a worker
Health and

Safety Plan

conforming to the requirements indicated above
.



Schedule

Contractor shall submit the construction schedule within 10 calendar days following
notice to proceed.


Sequencing/
Phasing Plan

Within 10 calendar days following notice to proceed,
Contractor shall submit a plan
presenting a sequencing and phasing plan for
preliminary tasks and submittals,

clearing
and grubbing
,
grading,
utility connections, utility equipment installation,
utility

conduit
/piping

trench
excavation
,
sewer connection,
utility

conduit
/piping
/wiring

installation, treatment system building construction, extraction and treatment system
construction
, and restoration that optimizes use of the available land area on the
property, expedites the work, and minimizes
disturbance o
f land
.


Changes to sequencing of work presented in Contractor’s approved plan shall only be
made with the concurrence of the
Engineer
.


Equipment/Materials List

Before beginning onsite work and within 20 days
following notice to proceed
, Contractor
shall submit a list of materials to Engineer for review.

The list shall include all items of
equipment and material, and the names of the manufacturers and suppliers with whom
purchase orders have been placed.

Provide sufficient data to prec
isely identify
materials and equipment Contractor proposes to furnish.

The list shall include Drawing
or Specification references.

Engineer will attempt to approve or disapprove of proposed
materials/equipment with 3 working days of the submittal.


Contr
actor shall resubmit the
above requested information for any equipment or materials that are rejected by the
Engineer.


Manuals, Instructions,
a
nd Certificates

Prior to final inspection, Contractor shall s
ubmit

four (
4
)

complete sets of all

manufacturer’s
specifications, cut sheets
(including major valves and other materials)
,
operations and maintenance
manuals, instructions, and certificates to Engineer
covering mechanical, electrical, instrumentation, piping items, and other material and
e
quipment provided by the Contractor, as noted in the
Drawings and
Specifications.
These materials shall be provided in
3
-
ring binder(s) with
cover
(
s
)

with printed title
“Operations and Maintenance
Materials
,” title of project, and subject matter of binder
if
multiple binders are required.

Place same information on
binder spine

so as to be
legible when standing upright on a bookshelf.


Internally subdivide the binder contents
with permanent page dividers logically organized; with tab titling clearly printed

under
reinforced laminated plastic tabs.

Include a table of contents for the manual.

Provide a
directory listing names
,

addresses, and telephone numbers of Contractor,
Subcontractors, and equipment suppliers and manufacturer’s representatives nearest to

Statement of Work

lII
-

5


PMG Phase 1 Interim Action




the job site for each major product in the manual.

Materials shall be bound
in 8
-
1/2 inch
by 11 text pages.

Larger sheets shall be folded to 8
-
1/2 inch by 11 inch size and
enclosed in transparent, top entry protective plastic folders.


Record Drawings

During the progress of the Work, maintain at the site a detailed record of all changes
from the layouts and lines and grades, details, or other information shown on the
Drawings and on Contractor
-
furnished drawings and data.


Enter the changes on the
record drawings promptly, but no later than on a weekly basis, using red, erasable
pencil.

Have on file current working record drawings showing all changes, associated
construction dates, documentation of the Owner’s approval for

changes, and
documentation of Contractor authorization to execute changes.

Contractor shall p
repare and submit final mark
-
up of the Drawings indicating as
-
built
dimensions and any other as
-
built changes to Drawings.


The set of Drawings shall be
clean exc
ept for red pencil used to indicate the as
-
built changes.


Record drawings shall
be submitted within 14 days of completion of the work.


Permit Applications

Permit applications for the permits identified under “Permitting” subheading above shall
be prepare
d and submitted to the appropriate permitting authority in a timely manner
and per the project schedule, allowing sufficient lead time for agency review and
approval.


Extensions

If Contractor is unable to meet the submittal deadlines identified above

for any reason
,
Contractor shall request and extension from the Engineer

at least 2 working days prior
to, and

as far in advance of
,

the deadline as practicable
. The request shall identify the
reason why an extension is needed and a proposed revised dead
line.



PROJECT CLOSEOUT

The Contractor warrants the Work delivered under the contract to be free from defects
in material or workmanship, and against damage caused prior to final inspection.

Unless otherwise specified, this warranty extends for a period
of one (1) year from the
date of final acceptance.

The Contractor shall promptly repair or replace all defective or damaged products or
materials delivered under the contract.

Prior to requesting final inspection, the Contractor shall submit to Owner and E
ngineer
written certification that the work has been thoroughly inspected by Contractor and is
complete in accordance with the Contract Documents.

A project closeout punchlist may
be used by Contractor, Engineer, and Owner.

Statement of Work

IV
-

1


PMG Phase 1 Interim Action


I
V
. SCOPE OF WORK


Contractor shall

construct the groundwater extraction

and treatment system
as
shown in
the Construction Drawings (Exhibit A
2

in
Attachment 1



Project Plans)
.
In the event
that discrepancies between this SOW and the Construction Drawings are identified, the
Construction Drawings shall take precedence. The discrepancy shall also be identifi
ed

to the Engineer

and/or clarification requested as needed
.

A summary of the Scope of
W
ork is presented below.



SUMMARY

The work will consist of
constructing all elements of the groundwater extraction system,
conveyance system, treatment system and building, and
treated water
discharge/sewer
connection
, including all auxiliary electrical and communications systems from the utility
connections at
Se
away Boulevard and to and from the system components.


Contractor
shall provide all materials and equipment that are not provided by Owner
,

as necessary
,

to produce a fully functional system in accordance with the
Construction
Drawings and
these specificat
ions.

The materials that will be provided by the Owner include
the low
-
profile air stripper and associated blower
.

T
he major equipment and materials to be
provided by Owner

and the Contractor

for the Work

is provided in schedules on the
Drawings
.

Contra
ctor shall be responsible for installing all equipment, including that
equipment provided by Owner.

Extraction wells
EGW
175,
EGW
182, and
EGW
183
will
be installed by
Owner
, but all wellhead structures and equipment will be
provided and
installed by the
Contractor.

The major elements of the work
include, but
are

not limited to, the following items:



Provision and installation of one new well vault
, submersible pump,

and
associated wellhead equipment
at well
EGW
175




Provision and installation of one new we
ll vault
, submersible pump,

and
associated wellhead equipment
at well
EGW
182



Provision and installation of one new well vault
, submersible pump,

and
associated wellhead equipment
at well
EGW
183




Provision and installation of groundwater conveyance piping
from extraction wells
E
GW
175,
EGW
182, and
EGW
183

to the new treatment system
building
location



Install a side sewer connection to the City sewer line

and associated structures



Provision and installation of
treated
groundwater conveyance piping from the
new treatment system
building
location
to the
side sewer connection to the City
sewer line
, including associated structures



Provide and construct
a treatment system building with

electrical power,

communications (telephone/internet),
lighting
,

heating, a below grade sump



Provide
,

install
, and test

the following treatment system equipment:


o

Owner
-
supplied
air stripper

o

Owner
-
supplied blower

Statement of Work

IV
-

2


PMG Phase 1 Interim Action




o

Moisture separator

o

Duct heater

o

Granular activated carbon (GAC

vessels) and associated manifold

o

Bridge crane

o

Temporary water supply

o

Double
-
walled temporary holding tank (outside building)



Provision and installation
of a
exterior concrete pad outside treatment system
building for temporary holding tank




Provision and installation of weather
-
proof
control panel enclosures at EGW175
and EGW
182



Provision and installation of system electrical
equipment and
wiring to all
equipment and instrumentation including, but not limited to, below ground
electrical condu
it and cables
junction boxes and vaults
;

and

associated breakers
and panels



Provision and installation of system communication lines including, but not limited
to, aboveground communications cables and poles; below ground
communications conduit

and cables;
and control panels



Provision and installation of all interconnecting piping and piping supports



Provision and installation of
interconnecting
electrical power wiring and

communications wiring

all

equipment and instrumentation.



Trenching
(and horizontal boring as necessary)
for pipe conveyance
, electrical
conduit, and communication line conduit
, and restoration
of natural areas and

gravel surfacing along roads



Off
-
site disposal of excess trench spoil



Site work including
grubbing and clea
ring,
excavation, grading and leveling,
subgrade preparation and compaction



P
ressure testing of lines



Startup and
testing of systems to ensure proper operation



S
urveying to determine slopes and elevations as specified



P
reparation of record drawings to
r
eflect the "as
-
built" condition.


The Work to be accomplished is organized into

the general areas listed below:


1.

Groundwater Extraction System.


Furnish (all materials not provided by Owner),
install, startup, and test submersible groundwater extraction p
ump
s

for extraction
well
s

E
GW
175,
EGW
182, and
EGW
183
.


Owner will furnish a 6
-
inch nominal
diameter open
-
hole drilled well
s
.

Contractor shall install
well head vault and
2
-
inch stain
less
-
steel riser piping for well
s

and shall install
valves and fittings
for
the well head
.

Statement of Work

IV
-

3


PMG Phase 1 Interim Action




2.

Groundwater Conveyance Piping.

Supply, install, and test the groundwater
conveyance piping.

New conveyance piping shall consist of
2
-

and 4
-
inch
diameter
conveyance

pipe joined to form continuous conveyance of groundwater
between indi
vidual well vaults (and existing steel piping) and the new treatment
system.

New groundwater piping shall be constructed of
butt
-
welded high
density polyethylene (HDPE
) and shall be compatible with TCE and other
chlorinated VOCs.

Electrical conduit
and
c
ommunication

line conduit
shall also be routed to the well
in the same trench as the conveyance conduit.

The Contractor shall supply and
install the electrical
and communications
conduit

and cable
.

C
onduit and cable
to the extraction wells shall be of th
e size specified on the electrical drawings and
specifications.



3.

Building.

P
repare site, p
rovide materials
,

and construct

a cement
masonry

unit
(CMU)

building

with a steel truss roofing system

to house the treatment system
.

The building interior
dimensions will be approximately 3
8

ft long, 20 ft wide, and
1
3

ft high
. Concrete floor to be sloped toward a blind sump with steel grated
cover
.


Building will be provided with heater to keep the building at or above
40°F. Building penetrations required
for
treatment system components

shall be
sealed in an aesthetic and water
-
tight manner.

4.

Treatment System.


Supply (those materials not provided by Owner), install, and
test the treatment system.

Contractor will be responsible for coordinating will all ut
ility providers to establish
necessary s
ervices (i.e., power, telephone
).

Owner will pay those fees to utilities
that are required for provision of new service connections.

Contractor will be
responsible for connection of services from the point of servi
ce provided by the
utility companies to the equipment of this Work.

Extracted groundwater shall be pumped to the treatment system

building

and
then to the inlet of the air stripper.

After treatment in the air stripper, water shall
flow by gravity to a
polyvinyl chloride (PVC)

line, as shown on the Drawings.

The
Contractor shall connect the air stripper effluent line to

piping that allows
operation under several configurations
as

shown on the Drawings:

a)
to a
discharge pump that pumps

to

the
4
-
inch HD
PE discharge line routed to the
sanitary sewer
outfall
,

b) to a discharge pump that pumps to a temporary ho
lding
tank outside the building,

or c) from the temporary holding tank and returned to
the air stripper (via
a transfer

pump) for additional
treatm
ent
.

Water purposefully or
inadvertently

discharged to the building sump shall be
pumped through 2
-
inch
PVC
piping, via a sump pump, to the temporary holding
tank.

Air exhausted from the air stripper shall be conveyed through a
n

8
-
inch steel duct
to a
moisture separator, duct heater, GAC treatment vessels, and a

10
-
inch
discharge

stack
through the roof of the new treatment system building.

The top
of stack shall be at a minimum height of
1
9

ft above ground surface elevation in
the area.

Statement of Work

IV
-

4


PMG Phase 1 Interim Action




5.

Discharge/
Outf
all

to Sewer
.
Install side sewer connection and associated
manhole structure for treated groundwater discharge to sanitary sewer.
Supply,
install, and test the treated
water conveyance piping. New conveyance piping
shall consist of 4
-
inch diameter conve
yance pipe joined to form continuous
conveyance of
treated
water between the new treatment system

and the

manhole structure, and 6
-
inch diameter pipe from the manhole structure to the

sanitary sewer outfall
. New piping shall be constructed of butt
-
welded
HDPE and
shall be compatible with TCE and other chlorinated VOCs.
.


6.

Instrumentation, Control, and Monitoring (ICM) System.

Supply, i
nstall, and test
a fully
programmed and
functional ICM system for the treatment equipment and
extraction systems,
consisting of

a Programmable Logic Controllers (PLC),

flow
meters, pressure indicators, pressure switches, level switches, level alarms, and
other miscellaneous elements, as noted on the Drawings.
ICM system
components to be provided are
shown

on

the

Drawi
ng
s

and described in

t
he

Technical Specifications
.

Contractor shall provide and install all required
aboveground and
underground
communications

conduit
, junction boxes,

and
wiring to the treatment building,
between the well
control panels,

and the
treatment system
components.

7.

Electrical. Contractor shall provide and install all required
aboveground and
underground electrical conduit
, junction boxes,
vaults
, and wiring

to the treatment
building
,
well vaults
, and treatment system components
.


Statement of Work

V
-

1


PMG Phase 1 Interim Action


V
.
TECHNICAL SPECIFICATIONS

The following sections provide technical specifications
for applicable elements of work
that supplement or augment the specifications provided in the Drawings
.



This part includes the following Sections:


Section
0
2200

Site Preparation and Earthwork

Section
0
2605

Vaults

and Manholes

Section
0
2900

Planting

Section
0
2950

Site Restoration and Rehabilitation

Section
0
3300

Cast
-
In
-
Place Concrete

Section
0
4
2
20

Concrete Unit Masonry

Section
05310

Steel Decking

Section
05400

Cold
-
Formed Steel Framing

Section
05530

Metal Gratings

Section
07410

Metal Roof Panels

Section
08110

H
ollow Metal Doors
a
nd Frames

Section
08330

Overhead Coiling Doors

Section
08630

Metal
-
Framed Skylights

Section
08710

Door Hardware

Section
08900

Louvers
a
nd Vents

Section
10520

Fire Extinguishers

Section 14630

Wall Supported Steel Bridg
e Crane

Section 15060

Pipe, Fittings, Valves,
a
nd Support

Section 15160

Well Equipment

Section 15400

Treatment Equipment

Section 17000

General Instrumentation, Control,
a
nd Monitoring Requirements

Section 17700


System Operating Description




Statement of Work

V
-

2


PMG Phase 1 Interim Action

Site Preparation and Earthwork


Section 02
200



SECTION 02
2
00



SITE PREPARATION

AND EARTHWORK

PART 1 GENERAL

1.
1

DESCRIPTION

A.

Provide
grubbing and clearing,
grading, excavating, backfilling,
compaction, removal and disposal of surplus excavated material, and
other work associated with meeting
established lines and grades, and
installation of buried and supported equipment and structures.

1.2

RELATED SECTIONS

A.

Division 2:
Site

W
ork



all sections.

1.3

REFERENCES

A.

ASTM D 422


Particle Size Analysis of Soil

B.

ASTM D 2922


Test Method for Density
of Soil and Soil
-
Aggregate in
Place by Nuclear Methods

C.

ASTM D 3017


Test Methods for Moisture Content of Soil and Soil
-
Aggregate Mixtures

D.

OSHA

E.

WSDOT
Standard Specifications for Road, Bridge, and Municipal
Construction 2010 M 41
-
10
G

F.

ASTM D 2488


Practice
for Description and Identification of Soils (Visual
-
Manual Procedure)

G.

ASTM D 2487


Classification of Soils for Engineering Purposes

H.

Landau Associates
.

Foundation Design

Memorandum.
April 27, 2010

I.

Western
Washington

Stormwater Management Manual

J.

City of
Everett Stormwater Management Manual

1.
4

SUBMITTALS

A.

Submit name of supplier and sample of each type of imported fill for
examination by Engineer.

Provide materials from same source throughout
the work.

Statement of Work

V
-

3


PMG Phase 1 Interim Action

Site Preparation and Earthwork


Section 02
200



1.
5

DELIVERY, STORAGE, AND HANDLING

A.

Pile delivered
and excavated material onsite in a manner that will not
endanger the work and that will not obstruct driveways or interfere with
facility operations. Take measures to prevent stormwater pollution,
including, but not limited to,
coir logs

surrounding the st
ockpiles, fabric
covers over catch basins, and temporary covers on the piles.

Material
piles shall
only
be located in
areas

specified by the Engineer or Owner.

B.

E
xcavated material suitable for use as backfill shall be piled in an orderly
manner separately
from unsuitable material, at a sufficient distance from
the edge of the trench to prevent material from sloughing or sliding back
into the trench.

C.

Excess excavated soils and m
aterials unsuitable for use as backfill shall
be
placed onsite as directed by the

Engineer or Owner.


D.

Contractor shall, to the maximum extent practicable, transfer excess
excavated soil directly into trucks.

E.

Conduct work in a manner that will cause the least interruption to local
business operations. Where local business operations
will be impacted by
the work being performed, the Contractor shall follow sequence of
construction so that local business operations are maintained.

1.
6

COORDINATION

A.

Notify Engineer at least 5 days before starting excavation. Excavation
shall not proceed
until Engineer has agreed to same.

B.

Provide the services of a competent buried utility locating service to
identify the location of existing buried utilities within the project site prior to
commencing excavation. Mark locations of existing buried utilities

and
planned location of buried utilities, equipment, and extents of excavation
prior to commencing excavation.

C.

Protect existing pipes, conduits, poles, wires, well casings, or other
apparatus that may affect the work, and protect the same, under, over,
al
ong or across said work. In case any of said pipes, conduits, poles,
wires, or apparatus should be damaged, they shall be repaired by
Contractor to the satisfaction of the Engineer, and the expense of such
repairs shall be borne by the Contractor.

Any dam
age to existing wells
shall be corrected by repair or replacement, by a
Washington

state
licensed well driller approved by Engineer.

Contractor shall bear all
expenses reasonably related to the repair or replacement of wells,
including, but not limited to
,

the well drillers services and materials,
professional oversight and documentation, and sampling and analysis (if
necessary).

Statement of Work

V
-

4


PMG Phase 1 Interim Action

Site Preparation and Earthwork


Section 02
200



PART 2 PRODUCTS

2.
1

STRUCTURAL FILL

A.

Structural fill is defined as fill used to obtain final
grade elevation for
footings,
earth

supported floor slabs, and paved or surfaced areas.
Structural fill shall consist of any suitable material that is nonorganic,
nonplastic, granular soil corresponding to soil types GW, GP, SW, or SP
soils, as designated by Unified Soil Classification Syst
em (U.S.C.S.) per
ASTM D 2488 and ASTM

D 2487.

To minimize the quantity of waste soil
generated, native soil shall be used as structural fill provided it
meets the
above requirements and
is free of topsoil, organic material, and debris.
CDF, as specified
in Paragraph 2.03 B of this Section, may be used as
structural fill.

Recycled material such as crushed concrete is not allowed.

2.
2

NATIVE MATERIAL

A.

Native excavated material free of topsoil or organic matter and any large
boulders, rocks, or chunks of
consolidated earth that might damage the
pipe or structure or present a compaction problem shall be used as backfill
material to the extent possible. Rocks larger than 3 inches measured in
any direction shall not be used as backfill material.

2.
3

BEDDING
MATERIAL

A.

Gravel:
Pipe zone b
edding material shall
consist of crushed, processed, or
naturally occurring granular material
s that
conform with
WSDOT

9
-
03.12(3)
.

B.

Controlled Density Fill (CDF): CDF may be substituted for gravel bedding
material in areas with limited access, such as at crossings of existing utility
pipes or
conduit
.

CDF shall
conform with WSDOT
9
-
01.2(4)
.

2.3

G
RAVEL SURFACING

A.

Gravel surfacing material for the final cover shall be
manufactured from
ledge rock, talus, or gravel, shall be uniform in quality
,
and substantially
free from wood, roots, bark, and other extraneous material
.

The material
shall conform to the requirement
s
WSDOT
9
-
03.9(3)
.

B.

Contractor may, at its option, utilize an imported, clean, gravel surfacing
material with different gradation and quality characteristics than specified
above if such material is suitable for its intended use, satisfies the general
requi
rements and intent of this Contract, and is acceptable to the
Engineer.

C.

Material when placed shall also allow ease of foot traffic and small vehicle
traffic such as a forklift.

Statement of Work

V
-

5


PMG Phase 1 Interim Action

Site Preparation and Earthwork


Section 02
200



PART 3 EXECUTION

3.
1


CLEARING
,

GRUBBING, AND GRADING

A.

Prior to

clearing,
grubbing, and grading,
wetland buffer and
waterway
buffer will be flagged or fenced within 50 feet of the project area(s).

B.

Contractor, in coordination with the Biologist or Engineer, will flag and
inventory diameter at breast height and species of trees to

be removed.
Any trees to be removed are to be replaced at a ratio of 2:1 following
completion of construction.
The Contractor shall notify the Biologist
or
Engineer
a minimum of five (5) working days in advance of

tree inventory.

C.

P
erform clearing, grubb
ing, and disposal of trees, snags, logs, brush,
stumps, shrubs, and rubbish from the designated work areas.

Clearing
and grubbing shall only be performed where necessary to safely and
effectively perform site grading, trenching, and construction. The limits of
the areas to be cleared and grubbed will be marked
with high visibility
fencing, silt fencing,

flags,
stakes, tree markings
and/
or other suitable
method
s
.

The limits of clearing and grading shall be verified by the
Engineer or Biologist prior to ground disturbance.

D.

Trees or other materials to be retained
or used

as habitat features will be
flagged and ide
ntified by the Engineer or Biologist.
The Contractor shall
notify the Biologist a minimum of five (5) working days in advance of
clearing the site.
Trees and other vegetation to be removed will be
designated with a different color flag, ribbon or stake.

E.

Trees
, shrubs, and other vegetation designated to remain undisturbed
shall be protected from damage throughout the construction period.

The
Contractor shall be responsible for the repair or replacement of vegetation
damaged by the Contractor’s operations.

Any superficial damage such as
cuts, skins, scrapes or bruises to the bark of protected vegetation shall be
carefully trimmed and treat
ed using locally acceptable procedures.

1.

Limbs or branches, one half (½

) inches or greater, which are broken
or otherwise severed during construction, shall be cut flush at the base
of the limb/branch.

2.

Roots, one inch (1

) or greater, which are broken
or otherwise severed
during construction, shall have their ends cut smoothly and
perpendicular to the root.

3.

Roots exposed during excavation or other operations shall be covered
with moist soil
to match the previous grades
as soon as possible.

F.

Materials removed during the clearing and grubbing operations will be
disposed of offsite as solid waste or recycled/composted. The Contractor
is responsible for complying with all applicable local, state or federal
regulations when the contract specifies

offsite

disposal of the materials.

Statement of Work

V
-

6


PMG Phase 1 Interim Action

Site Preparation and Earthwork


Section 02
200



G.

Site grading shall be performed as shown
on the Drawings
.
Structural fill
shall be imported, placed,
and compacted
as specified in paragraph
s

3.03,

3.04, and 3.05

of this section.

H.

Before and during soil disturbance activities, Contractor shall implement
the temporary erosion and stormwater control measures shown on
the
Drawings
and
the
best management practices.

I.

Contractor shall recycle construction, demolition, or land clearing (
CDL)
debris where practical. And report quantities to the Engineer and Owner.
These reports must include:

1.

A description of all recyclables, non
-
hazardous waste, and CDL debris
removed from the site.

2.

The quantity of recyclables and non
-
hazardous waste

remo
ved from
the site by weight, for that period.

3.

Classification of the recyclables according to the following categories:

a.

Concrete, asphalt and masonry,

b.

Clean soil and gravel,

c.

Metals,

d.

Stumps and brush,

e.

Recyclables sorted off

site by a
third

party provider.

f.


3.
2

EXCAVATION

A.

The working area of the site shall be cleared of all debris.

The clearing
limits
shall be as marked in the field and
shall be kept to the minimum
extent needed to accomplish the work.

B.

Excavation for trenches shall conform to the limits show
n on the Drawings.
The Contractor shall also prevent surface water from entering the trench.

C.

Width and Depth: The excavation shall be of such width to permit
workmen to satisfactorily install buried structures, and to provide safe
working conditions in
accordance with federal, state, and local laws and
regulations.

Trench safety is the sole responsibility of the Contractor, but
compliance with OSHA and other applicable regulations is mandatory.

Where required to prevent caving of the trench, or by any s
afety law or
regulation such as OSHA, the Contractor shall furnish and install bracing
and/or sheeting to protect the excavation.

This bracing and/or sheeting
shall be removed as trench backfill progresses.

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D.

Excavations for vaults and similar structures shall be large enough to
provide proper working room.

Any over depth excavation shall be
backfilled with compacted gravel or other approved material at the
Contractor's expense.

E.

Excavate to bring the required cut areas to rough grade or subgrade in
accordance with the

drawings within plus or minus
0.10 feet.

F.

The Contractor shall remove and dispose of all water entering the
excavation.

Disposal of water shall be done in a manner t
o prevent
erosion or sediment from entering adjacent wetlands or surface water, and
in accordance with all applicable laws and regulations.

Pumps shall be
adequate to maintain a dry trench during the bedding, pipe installation,
and initial backfill to an
elevation at least one foot above the top of pipe.
No backfill may be placed in standing water under any circumstances.

G.

Dust and storm water control shall be maintained during construction.

H.

Barricade open excavations

to prevent access during nights and
we
ekends and when excavations are not actively being worked.

I.

Schedule activities to minimize period during which excavations remain
open.

No excavation shall remain open for a period longer than 5
calendar days without written approval of the Engineer.

3.
3


BACKFILLING

A.

Compact subgrade to density requirements specified in paragraph 3.0
4
, of
this section.

B.

Remove loose, soft, or wet subgrade soil that cannot be compacted to the
specified density.

Backfill with structural fill and compact as specified in
parag
raph 3.0
4

of this section.

C.

Employ a placement method that does not disturb or damage existing
features or other work.

D.

Bedding shall be placed in conformance with the details shown on the
Drawings

to uniformly support the buried structures throughout their
length
. Before placing any bedding material, the bottom of the trench shall
be hand raked ahead of the pipe laying operation to remove stones and
lumps which will interfere with smooth and complete bedding of the pipe.
After the pipe has been laid and appr
oved for covering,
the

specified
bedding material shall then be placed in layer(s) the full width of the
trench, and compacted as indicated in the Drawings and paragraph 3.04
of this section.

E.

Trenches shall be backfilled above the bedding material, as show
n in the
Drawings, with suitable material saved from trench excavation.

If there is
Statement of Work

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Site Preparation and Earthwork


Section 02
200



not sufficient suitable material from the excavation, the backfilling of the
trench shall be completed utilizing imported backfill. The backfill and/or
imported backfill s
hall be compacted as indicated as indicated in the
Drawings and paragraph 3.04 of this section.

F.

Excavations in existing roadways shall be resurfaced to match pre
-
existing
conditions.

G.

In freezing weather, prior to terminating the work for the day, loose
pro
tective material shall be placed on top of the backfill to prevent freezing
and shall be removed prior to subsequent work. Backfill shall not be
placed on snow, ice or frozen soil.

3.
4


COMPACTING METHODS

A.

The fill material shall be compacted at a moisture

content within 2% of
optimum moisture content.

Structural fill and bedding shall be compacted
to a firm, unyielding condition within the limits of any pipe trench where the
depth of fill over the pipe is less than 12 inches.

In areas where
subsurface ut
ilities are covered by at least 12 inches of fill and under
structures such as
the treatment building,
catch basins and vaults,
compact structural fill to finish paving elevation to at least 95 percent
maximum density, as determined by ASTM D 1557.

Engine
er may have
testing done to verify that the requirement for minimum 95% compaction
has been achieved.

Contractor shall be responsible for any recompaction
and re
-
testing required due to failed compaction testing.

B.

Field Densities shall be determined by the

Sand Cone Method, ASTM D
1556, or the Nuclear Method, ASTM D 2922.

At the time of compaction
the moisture content of that portion of the backfill material passing a U.S.
No. 4 sieve shall be not more than 3 percent above the optimum moisture
content as d
etermined by the laboratory tests.

C.

Place
bedding material

in layers not exceeding
6

inches loose depth.
Place backfill in layers not exceeding
12

inches loose depth.

Hand
compact bedding material to a distance of 3 inches above the top of pipes
prior to u
sing mechanical compacting equipment.

D.

Avoid contacting any pipe or buried conduit with mechanical compacting
equipment.

Do not use mechanically
-
powered compaction equipment
directly over pipe or conduits until sufficient backfill has been placed to
preven
t damage to, or displacement of, the pipe or conduits.

3.
5


TREATMENT SYSTEM AREA

A.

If necessary following grading and leveling, structural fill shall be placed to
raise the treatment system area to the proper elevation indicated on the
Drawings.

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Section 02
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B.

Structural fill used for the treatment system area base shall be in
accordance with paragraph 2.01A.

CDF shall not be substituted for
structural fill in the treatment system area.

C.

Gravel Surfacing: The top layer of gravel surfacing shall be placed in one
lift at the treatment system area to provide a minimum of 3 inches depth.
This top layer shall be provided to prevent a muddy or dusty ground
surface.

1.

Moisture condition the gravel surfacing material to or near its optimum
moisture content, as determined b
y ASTM D 1557. Place, grade, and
compact gravel surfacing to elevation

on the Drawings.

Compact
granular surfacing to at least 92 percent of its maximum dry density
(ASTM D 1557).

3.
6


DISPOSAL OF EXCAVATED MATERIAL

A.

All excavated soil and debris

not used
as backfill shall be
placed onsite as
directed by the
Engineer

or Owner
.

B.

Asphalt and concrete removed under this Contract shall be transported
offsite to a facility licensed to receive the material for either recycling or
disposal.

C.

Submit copies of receip
ts, weigh tickets, and other documentation
verifying that disposal of soils, asphalt, concrete, and other wastes was
completed in accordance with this paragraph.

3.
7


FIELD QUALITY CONTROL

A.

Field inspection and testing will be performed by the Contractor to

the
satisfaction of the Engineer during the Work.

B.

Perform compaction testing in accordance with ASTM D 1557, ASTM D
1556, and ASTM D 3017 at two locations, selected by the Engineer, within
the limits of the area where the new treatment system concrete pad

and
building is to be constructed.


Compaction testing shall also be conducted
along the run of each trench, at locations selected by the Engineer, at no
more than 400 ft between testing locations.

Compaction testing will not be
required in areas where C
DF is used as backfill.

C.

If tests indicate work does not meet specified requirements, remove work,
replace, compact, and retest.

END OF SECTION





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PMG Phase 1 Interim Action

Vaults and Manholes


Section 02
605


SECTION 02605



VAULTS

AND MANHOLES


PART 1 GENERAL


1.1

DESCRIPTION

A.

The Work of this section includes supply and installation of
five

underground, precast, concrete vaults

and manholes
, as shown on the
Drawings.


1.
2


RELATED SECTIONS

A.

Section 02200: Earthwork

B.

Section 15060: Pipes, Fittings, Valves, and Supports

C.

Section 15160
:

Well Equipmen
t


1.
3


SUBMITTALS

A.

Provide shop drawings for t
he

vaults and all appurtenances
. Drawings
shall indicate exact dimensions and weight of each unit; dimensions and
locations of vault penetrations; design capacities for lifting lugs; and
fabrication, handling, and installation procedures.


PART 2 PRODUCTS


2
.1


PRECAST CONCRETE VAULTS

A.

Precast concrete vaults for extraction well
s

EGW175, EGW18
2
, and
EGW183
, and for the discharge pipe junction,

shall be
as specified in the
Drawings and m
odified
as necessary to accommodate the well vault
equipment
.

Concrete
vaults shall include vault accessories, including lids

as specified in the Drawings
.

Precast concrete vault
s

shall conform to the
following:

1.

Vault covers shall be water tight and
lock
able (with padlock)
, and
frames shall be manufactured to withstand AASHT
O H
-
20 loading.

2.

Factory Modifications: 10” diameter bottom penetration for well casing,
24” diameter bottom penetration for sump.

3.

Open bottom for discharge
electrical

junction vault

B.

Precast concrete
manhole for the discharge structure adjacent to the side
sewer connection

shall be as specified in the Drawings.

Manhole

shall
include
standard manhole lid
.

Statement of Work

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PMG Phase 1 Interim Action

Vaults and Manholes


Section 02
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C.

Well control panel enclosures for extraction wells EGW175 and EGW182
as specified in the Drawings.



2.2


GROUT

A.

Non
-
shrink grout shall be equivalent to “
Masterflow 928” manufactured by
Masterbuilders
,

Inc.


PART 3 EXECUTION


3.1


INSTALLATION

A.

Contractor shall install vaults

and manholes

per specifications in
Drawings
.

B.

The final location of the associated well control panel enclosures shall be
flagged by
the Contractor and confirmed by the Engineer prior to
installation.

C.

Contractor shall have sole responsibility for coordination of other trades,
subcontractors, delivery, off
-
loading, and all necessary incidental material
to accomplish and accurately instal
l vaults

and manholes

in a timely
manner to prevent delay of job progress.

D.

Contractor shall have sole responsibility for providing adequate equipment
and trained personnel to accomplish safe placement of vaults

and
manholes

and ancillary equipment
, includi
ng the control panel enclosures
.

E.

Vault penetrations for well conduit and drains shall be factory
-
drilled, saw
cut, bored, or cast
-
in during fabrication or saw cut in the field.

Chiseled or
jack
-
hammered penetrations are not acceptable.

Final vault pipe
p
enetrations shall be completely filled and patched with non
-
shrinking
cement grout.

A trowel or other instrument shall be used to create a
finished surface surrounding all pipe penetrations that is smooth and flush
with the interior surface of the vault.
Seal grout as recommended by the
grout manufacturer.

Link
-
Seal® Modular Seals may be substituted for
seal grout.

F.

Special care must be exercised to prevent damage to groundwater
extraction well casings or existing utility conduits during excavation for,
an
d setting of, well vaults.

Contractor shall repair all damage to well
casings and utilities at Contractor’s expense.

Any damage to existing
wells shall only be corrected

by repair or replacement by a Washington
state
-
licensed well driller approved by
Engineer
.

Contractor shall bear all
expenses reasonably related to the repair or replacement of wells,
including, but not limited to, the well driller’s services and materials,
professional oversight and documentation, and sampling and analysis (if
necess
ary).

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Vaults and Manholes


Section 02
605


G.

Contractor shall have sole responsibility for setting vaults as shown on the
Drawings to provide adequate clearance for the installation of pumps, and
other ancillary equipment within the vault.

Install vaults to elevations
indicated on the Drawings
.

H.

Backfilling around vault shall be accomplished in a uniform and even
manner to prevent shifting or misalignment after setting vault. Backfill and
compaction shall conform with Section 022
0
0.

The completed vault
installation shall result in a vault that
is level and plumb.

I.

Install cast iron frame on vault lid by placing a minimum 1/2
-
inch thick
layer

of non
-
shrink grout on the lid within the footprint of the frame.

Trowel
the grout bed level.

Place frame on grout bed and apply firm pressure to
seat the
frame in the grout.

Grout shall completely fill
space

between the
lid and the frame base plate to a thickness of not less than 1/8 inch.
Frame shall be accurately centered over the cast opening in the lid.
Remove excess grout in the frame/lid opening.

Pr
otect frame and lid from
damage or movement until grout has initially cured.

Place structural fill
around and above vault lid and frame and compact using manual
compaction equipment.


END OF SECTION













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PMG Phase 1 Interim Action

Planting


Section 02
900



SECTION 02
900


PLANTING