HomeMy WebLinkAbout143-84 RESOLUTION7
RESOWTI ND. 143-84
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A RESOLUTION AUTHORIZING THE MAYOR AND CITY CLERK
TO EXECUTE AMENDED TASK ORDER NO. 3 TO THE CITY'S
BASIC AGREEMENT WITH CH2M HILL SOUTHEAST, INC.,
DATED JULY 20, 1983, FOR IMPROVEMENTS TO THE CITY'S
WASTEWATER TREATMENT PLANT TO PROVIDE NECESSARY
ENGINEERING SERVICES ON THE PILOT PLANT STUDY
REQUIRED BY THE UNITED STATES ENVIRONMENTAL PROTECTION
AGENCY.
BE IT RESOLVED BY TBE BOARD OF DIRECTORS OF TBE CITY OF FAYE11EVIUE,
ARKANSAS:
That the Mayor and City Clerk are hereby authorized and directed
to execute Amended Task Order No. 3 to the City's basic agreement
with CH2M Hill Southeast, Inc., dated July 20, 1983, for improvements
to the City's Wastewater Treatment Plant to provide necessary engineering
services on the pilot plant study required by the United States Environ-
mental Protection Agency. A copy of Amended Task Order No. 3 authorized
for execution hereby is attached hereto marked Exhibit "A" and made
a part hereof.
PASSED AND APPROVED this 7th day of December , 1984.
4.
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AMENDED TASK ORDER NUMBER 3
PILOT PLANT SERVICES
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Task Order Number 3 amends the basic agreement executed
between CH2M HILL SOUTHEAST, INC. (Engineer), and the CITY
OF FAYETTEVILLE, ARKANSAS (Owner), on the 20th day of July,
1983.
ARTICLE 1
In response to a requirement of EPA and the ADPC&E, a pilot
plant study will be conducted to verify performance not
sufficiently tested and assess the operational
characteristics of the A/O process for Fayetteville. The
results of this study will be used to modify the design
basis, if required.
The study will be designed to begin operation in the winter
of 1985 with at least six months of operation. Two
operating periods are anticipated from January through April
and from July through August of 1985. .Actual operation will
depend on climatic conditions. More specifically the
schedule of milestones to be reached from the date of
project authorization is as follows:
o Draft Work Plan Submittal
o Equipment Delivery
o Initial Plant Start-up
o Pilot Plant Operation
o Final Report
October 1, 1984
November 1, 1984
December 1, 1984
January 1, 1985
February, 1, 1986
This project will be divided into five phases: Planning
Phase, Installation Phase, Startup and Acclimation Phase,
Operation Phase, and Report Phase.
The Engineer will be assisted by McClelland Consulting
Engineers and Air Products. Additionally, a nationally
recognized expert in biological treatment will be retained
to provide an independent overview report directly to the
Owner.
The size of the pilot plant will be dictated by the
availability of equipment and the rigorous schedule imposed
on the study. The anticipated flow rate is 1 to 2 gpm of
waste flow.
The scope of work is more fully described in Appendix A,
attached.
ARTICLE 2
As consideration for providing the services enumerated in
Article 1 above, the Owner shall pay the Engineer a lump sum
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FAHIBA
•
amount of_$393-,`-402: If work beyond the scope of work de-
scribed in Appendix A is required, the work scope shall be
amended in writing and payment made on the basis of payroll
cost plus 162% of payroll cost plus direct project expenses
plus 15% for profit.
ARTICLE 3
Payment to the Engineer for services provided as described in
Article 1 is due to be made within 30 days after date of
billing.
ARTICLE 4
The provisions of EPA 40 CFR 33.1030, which is attached as
Appendix B to this Agreement, are hereby made a part of this
Agreement.
ARTICLE 5
IN WITNESS WHEREOF, the parties hereto each herewith sub-
scribe the same in triplicate.
FON" CITY
By
l�iJ
(Name)
Attest:
jd/CGT2/027
ea
YETTEVILLE„ ARKANSAS
F S
le)
FOR CH2M HILL SOUTHEAST, INC. /�
By: ; ..4.„...._(//�fi (7
( e (Title)
Dated this -��� day of11'"� , 1984
-2-
14
C
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Engineers
® Planners
Economists
® Scientists
November 30, 1984
MG18761.A0.06
Mr. Larry Wilson
Arkansas Department of Pollution
Control and Ecology
8001 National
Little Rock, Arkansas 77209
Re: Wastewater Treatment Facilities - Pilot Plant
Study Fayetteville, Arkansas C-050366-11-0
Dear Mr. Wilson:
4
Enclosed is a copy of our Work Plan and contract for the
Fayetteville, Arkansas Pilot Study. These items reflect
comments by ADPC&E and EPA in the meeting held Thursday,
November 29.
The pilot plant is now in the acclimation phase. We intend
to have Dr. Joh Kang at the plant next Thursday for his
initial review of the facility. If any of your staff desires
to look at the facility, we will be at the plant Thursday
afternoon at 2:00 p.m.
If there are questions on this matter, please do not hesitate
to call.
Very truly yours,
Stephen R. Gelman, P.E.
Project Manager
jd/SRGI/035
Enclosure
cc: Ancil Jones/U.S. EPA Region VI (w/enclosure)
Vernon Rowe/tMcClelland iW enclosure -)n
Ed Barth/U.S. EPA Merl Cincinnati (w/enclosure)
Bob Franzmeier/City of Fayetteville (w/enclosure)
Mike Laurence/City of Fayetteville (w/enclosure)
Glen Daigger/CH2M HILL (w/enclosure)
CH2M HILL, INC. Montgomery Office 807 S. McDonough Street Montgomery, Alabama 36104 205.834.2870
i.
APPENDIX A
WORK SCOPE AND BUDGET
FAYETTEVILLE PILOT PLANT STUDY
INTRODUCTION
Background
This work plan outlines a proposed pilot plant program for the
Fayetteville, Arkansas, Wastewater Treatment Plant (WWTP).
The pilot plant is requested by the EPA on the basis that the
treatment process selected has limited operational data
available to verify performance and includes enough risk to
warrant a pilot plant to demonstrate that the selected
treatment process will work under anticipated'environmental
conditions. The selected treatment process includes
biological nitrification and phosphorus removal in a single
activated sludge system using a variation of the A/O process
currently marketed by Air Products and Chemicals, Inc. (APCI),
Allentown, Pennsylvania.
Communications with the EPA and State of Arkansas Department
of Pollution Control and Ecology (ADPCE) officials indicate
the following list of potential objectives for the pilot plant
study:
1. To demonstrate the ability to obtain simultaneous
nitrification and biological phosphorus removal
during wintertime (cold temperature) operation.
2. To demonstrate the impact of nitrified mixed liquor
from the oxic to anoxic stage for denitrification
with special emphasis on optimizing the effects of
alkalinity.
3 To determine the impact of all side streams from the
solids processing area on process performance.
4. To determine chemical requirements to remove the
remaining phosphorus in the biological process
effluent and the impacts of these chemical additions
on the operation of the tertiary filters and sludge
disposal, as well as the impact of sludge recycle to
the anaerobic basin.
Alternatives
Two alternatives were investigated to accomplish the four
potential objectives listed above:
1. Construction of a specially designed 15-gpm pilot
plant and operation for a 12 -month period. Both
A-1
cl
4y
cold -weather operation and warm -weather operation
would be simulated. A 4-ft2 pilot filter would
also be operated periodically to assess the perfor-
mance and impacts of filter operation.
2. Use of a one-gpm mobile pilot plant which can be
modified to be available from APCI for a period of
12 months to simulate both cold -weather and
warm -weather operating conditions. Jar testing
would be used to estimate the chemical requirements
for polishing the effluent phosphorus concentration
and to evaluate the need for a continuous
pilot -scale filter and, if found to be required,
determine the effects of sludge recycle to the
anaerobic basin.
These two alternatives were reviewed internally and a deci-
sion was made to use the one-gpm mobile pilot plant. Reasons
for this selection include:
1. The 15-gpm specially designed pilot plant would
take longer to design and construct than the time
required to modify, move in, and set up the one-gpm
mobile unit. Since construction of the full-scale
plant will be occurring concurrently with this
pilot plant study, it is crucial that data be
collected during the cold weather in the 1984-1985
winter season. The longer time required for the
15-gpm unit could jeopardize the possibility of
obtaining cold -weather data during the winter of
1984-1985.
2. Examination of the design of the full-scale plant
indicates that recycle streams should have only a
negligible impact on the biological treatment
process. The principle recycles include gravity
thickener (primary sludge only) overflow, dissolved
air flotation thickener (waste activate sludge
only) subnatant, and effluent filter backwash. Of
these, gravity thickener overflow and dissolved air
flotation subnatant are not expected to contain any
more soluble BOD or phosphorus than primary efflu-
ent, and consequently, should not adversely affect
the biological system. Effluent filter backwash
will be returned ahead of primary treatment, where
some of the solids will be removed in the primary
clarifiers for discharge directly to the aerobic
digesters. The aerobic digesters will not be
decanted, and all digested sludge will be
land -applied.
3. Discussions with EPA Cincinnati indicated that the
EPA is primarily concerned about Objectives 1 and 2
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listed above and that the one-gpm pilot plant should
be adequate to address these primary objectives.
4. The 15-gpm alternative is estimated to cost about
$210,000 more than the cost of the one-gpm
alternative.
OBJECTIVES
Based on the considerations listed above, the following
specific pilot plant study objectives are:
1. To operate a one-gpm pilot plant in a fashion which
simulates the design loading and operating conditions
for the Fayetteville variation of the A/O process to
determine the effluent ammonia, soluble and total
phosphorus, BOD, and CBOD concentrations which can
be achieved.
2. To demonstrate the feasibility of nitrified mixed
liquor recycle (for denitrification and alkalinity
recapture) and its impact on nitrification.
3. To conduct jar tests to determine the supplemental
chemical requirements and to select the best
chemical injection point to polish the biological
process effluent to meet effluent total phosphorus
standards (Table 1). Pilot -scale filtration may be
conducted based on future requirements of ADPC&E
following data review. Filtration studies are not
included in this work scope and budget.
4 If pilot -scale filtration studies are conducted,
recycle stream will be piloted and a determination
made on all aspects of the process.
APPROACH
Perspective
The new Fayetteville WWTP will have a design capacity of 17
mgd (11,800 gpm), while the pilot plant will have a design
capacity of about one gpm for a scale -down factor about
12,000:1. The number of stages per train will be identical.
Description
A listing of the unit sizes and design factors for the
full-scale facilities is shown in Table 2. Unit sizes and
design factors for the pilot plant are shown in Appendix C.
simplified flow diagram showing the number of process units,
their arrangement, and recycle streams is shown in Figure 1.
A-3
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Parameter
:7
Table 1
EFFLUENT STANDARDS
(Dec. to March) (April to Nov.)
(mg/L) (mg/L)
30 -Day Average TSS 5 5
30 -Day Average BOD 5 5
30 -Day Average NH3-N 10 2
30 -Day Average TP -P 1 1
Dissolved Oxygen 10.2 7.8
3h/SR I/d.102
Full -Scale WWTP Item
FLOW, mgd
PRIMARY CLARIFIERS
HOR, gpd/sf
HRT, hr
BIOLOGICAL TREATMENT
BASINS
Anaerobic
HRT,hr
Anoxic
HRT, hr
w/o recycle
w/recycle
(100-300%)
Table 2
FULL-SCALE DESIGN FACTORS
Number and Size
2 @ 100' dia x 14' SWD
Volume
2 x 0.82 x lg6
= 1.64 x 10 gal
3-4/train @ 6 x 102,700
30' x 30' x 15.25' SWD = 616,200 gal
3-2/train @
30' x 30' x 15.25' SWD
Oxic 4/train @
56' x 112' x 15.7' SWD
HRT, hr
SRT, days
MLSS, mg/L
RAS, mgd
SECONDARY CLARIFIERS
HRT, hr
SLR, lb/ft2/d
HOR, gpd/ft2
jh/SRGI/d.102
4 @ 100' dia x 14' SWD
6 x 102,700
= 616,200 gal
8 x 737,500
= 5.9 x 106 gal
4 x 0.82 x 1g6
= 3.28 x 10 gal
Design Conditions
Peak
Week
Annual Average
Average Day
11.4
725
3.5
1.3
1.3
0.7-0.3
17.0
1,080
2.3
0.9
0.9
0.4-0.2
W S W S
12.4 1:274- 8.3
10 5 10 5
2,530 1,520 3,500 2,070
5.8 3.5 11.9 7.0
6.9 6.9
11.4 6.0
363 363
4.6
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Procedures
The pilot plant will be operated continuously during the
start-up, acclimation, and demonstration operation period.
Seed sludge will be added to the system from an operation AO
plant pilot to speed up the acclimation.
The feed to the pilot plant will be full-scale primary
clarifier effluent with existing recycle streams diverted
downstream of the take -off point. Recycle stream flows have
been accounted for in the pilot plant design and operation.
AP personnel will be involved in pilot plant start-up and
acclimation. During the actual operation period the pilot
plant will be attended 5 days a week by CH2M HILL and
McClelland Engineers staff. The planned staffing is for 40
hours a week by CH2M HILL's process engineers and 20 hours a
week by McClelland's technician. Weekend coverage will be
the minimum necessary to ensure continued operation of the
facilities.
Composite samples will be collected at selected sample points
with 24-hour composite samplers and will be collected on a
preselected flow proportional basis (to simulate actual
diurnal loadings). Additional information on the sampling,
testing, and influent flow rate variation is included in
Appendix B, Experimental Work Plan.
CH2M HILL will analyze data as it is collected and will make
process adjustment determinations. An independent consultant
will be retained by the City of Fayetteville to visit the
pilot plant and to provide an independent review of the
operating data and the pilot plant summary report. The
independent consultant will be retained during the start-up
period to advise on QA/QC procedures and to review planned
operations.
PROJECT ORGANIZATION
All services required for the pilot plant studies shall be
coordinated by Robert Franzmeier, Project Director. CH2M
HILL (Engineer) and its subcontractors Air Products (AP) and
McClelland Consulting Engineers (subcontractor) shall provide
the necessary engineering services. Escom Laboratories shall,
provide analytical services under a direct contract with the
City of Fayetteville (City). Joh Kang (Consultant) of
McNamee, Porter, and Seeley shall provide a separate overview
role to be more fully described in the work scope.
The pilot plant is provided by APCI. All refurbishing,
installation, mechanical start-up, and biological acclimation
shall be their primary responsibility. Following biological
acclimation AP shall be responsible only for mayor pilot
A-4
•
plant maintenance and consulting on an as -requested basis.
AP will not maintain full-time presence during the operation
and later phases of the project.
The Subcontractor will provide cost effective local support
during pilot plant installation and operation, and will
assist in writing the final report.
Coordination of all services will be the responsibility of
the Project Director, acting for the City.
The organization chart for the project is shown on the
following page.
Project Responsibilities
A brief narrative follows describing the responsibilities of
each member of the project team.
Project Director
The responsibility of the Project Director is to provide
overall project coordination, provide communication between
the City, Engineer, Consultant, Escom Labs, and the Regu-
latory Agencies.
Independent Project Consultant
The Independent Project Consultant will provide general
oversight through review of the work plan, monthly and final
reports, and will make three site visits. The Consultant
will also be responsible for over sight for the QC/QA
program. A final report will be prepared and presented to
the City.
Escom Laboratories will provide to the project direct as well
as QC laboratory services to specifically QC the field
analyses in accordance with the following schedule:
Analytical Test Program
Tests Per Week
Parameter Operation Interim QC
TKN 4 2
NH3 12 6
NO3 14 7
TSS
TP 14 7
Ortho P 16 8
BOD 28 14
MLSS/MLVSS --
VSS --
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Coordination of samples and data reporting will be the
responsibility of the Engineer.
Engineer
The Engineer shall have overall technical responsibility for
the project. This responsibility will be carried out by the
following as follows:
Principal -in -Charge. Responsible to make sure that the
resources of CH2M HILL are made available to the project
in a timely and efficient manner. Responsible for
seeing that the overall objectives of the project are
met.
Project Manager. Responsible for developing and execut-
ing the project plan. The project manager shall be
responsible for coordination of all Subcontract and APCI
services and coordinating with the Project Director on
all project matters.
Process Consultant. Responsible to see that the pilot
plant is operated in accordance with the WWTP design
basis, interpret results, assist in pilot plant op-
erations, and to provide general technical assistance to
the project manager.
Process Engineer. Responsible for day-to-day services
during the operations phases.
Subconsultant
The subconsultant was chosen to provide services because of
the ability to provide timely and cost effective local
assistance. The Subconsultant will provide staff to the
Engineer in the following areas:
Subconsultant Coordinator - Responsible for coordination
of all local activities and will attend project meetings
and assist in writing the final report. He will be
responsible to see that the resources of the Subconsul-
tant are made available to the project in a timely and
cost-effective manner.
Lead Engineer - Responsible for local engineering
principally during the start-up, acclimation and opera-
tional phases. During the interim operational phase
will be responsible for the pilot plant operation.
Technician - Responsible for onsite assistance on a
day-to-day basis during the installation, acclimation,
and operations phases. He will assist on a daily basis
during the interim operations period.
A-6
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PROJECT PHASES
The project is divided into the following five phases;
planning, installation, acclimation, operation, and final
report. Each of these phases is discussed below.
Planning Phase
The initial project phase is a planning phase in which
project scope and activities are defined. Tasks in this work
phase include:
1. Development for project work plan
2. Development of project budget as scheduled
3. Provision for local pilot plant arrangements
including electrical and plumbing service
4. Development of subcontractor working agreements
5. Attendance of client, EPA, and ADPC&E meetings to
review and further define work scope and project
work plan
6. Development of independent consultant procurement
7. Development of lab procedures and protocols
Installation and Acclimation Phase
APIC will have primary responsibility to install the pilot
plant at the Fayetteville Wastewater Treatment Plant (WWTP).
It is anticipated that this effort will take 14-21 days after
the pilot plant arrives onsite.
The pilot plant will receive primary clarifier effluent from
the existing facility. Vacuum filter filtrate will be
removed from the primary effluent so that this waste stream
will be compatible with the proposed full-scale primary
effluent stream. Modification to remove the filtrate line
and replacement of the filtrate pumps will be undertaken
during this phase of the work.
Specific tasks to be completed under this phase include:
1. Rerouting of vacuum filter filtrate line
2. Electrical hookup to pilot trailer
3. Field hookup of pilot components including inter-
connecting piping, unit leveling, electrical
4. Instrumentation calibration and checkout
5. Hydraulic testing of units
6. Sampler setup
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Acclimation Phase
Following hydraulic chedkout of the pilot plant, approximate-
ly one-month acclimation period will begin. The purpose of
this phase is to develop microorganisms suited for biological
removal of nitrogen and phosphorus and to begin to adjust
plant operation to goal conditions (solids retention time,
hydraulic retention time, aeration requirements, solids
recycle rates, etc.). Approximately 2-3 sludge ages are
required to acclimate the plant to the point where useable
data can be taken.
Activities planned for this work phase include:
1. Introduction of primary clarifier effluent to
system
2. Establish flows, recycled rates, solids wasting
rate
Establish sampling procedures
II 4. Initial data collection to assess progress of
acclimation
5. Training of operators
APCI will have a technician/operator onsite full-time during
the acclimation period. This period is critical to the
establishment of a biomass to accomplish phosphate and
nitrogen removal. APCI's familiarity with the process. and
their equipment will greatly facilitate this process.
Active biological solids from an operating A/O system will be
used to seed the pilot plant to expedite acclimation.
The Engineer's and Subcontractor's personnel will also be
involved in this phase. Their primary tasks will be to
become familiar with pilot plant equipment, process op-
erations, and control systems and to assist APCI staff in the
pilot plant operation.
Operation Phase
This phase of the project will begin following biological
acclimation, hopefully prior to January 1, 1985. The Engi-
neer will be fully responsible for this phase of the project,
assisted by the Subcontractor.
A total of six months of pilot plant operations are budgeted
and planned for. The anticipated schedule is as follows:
Winter Operation January 1 - May 1
A-8
Interim Operation
Summer Operation
Interim Operation
May 1 - July 1
July 1 - September 1
September 1 -.December 31 (by
City forces)
The pilot plant will be operated by a process engineer and
technician during the operation phase. Each will work a five
day, 40 hour week with schedules developed to maximize
coverage of the pilot plant during the week, based on
operational requirements.
During the interim operation period, May 1 through July 1, the
pilot plant will be operated to maintain biological activity
with reduced sampling with only the technician working 1/2
time, assisted by WWTP staff as needed. City forces will
operate the pilot plant in a similar manner during the second
interim operation period, September 1 through December 31.
Sampling during this period is anticipated to be reduced 50%
from the operational period schedule.
Monthly summary reports and data review will be prepared
during the course of the study. These will allow ongoing
process evaluation and assist in establishing process
modifications required for further study.
Report Phase
Two interim reports are planned. The first report will be
mid-May after approximately 4 months of operation. The second
summary report will be presented in mid-September 1985
summarizing the second period of operation (2 months) . A
final report will be presented by January 30, 1986,
summarizing the entire pilot study.
General Project Tasks
Over the course of the project study, several tasks will
occur. These include project management, senior process
review, client, EPA, and ADPC&E meetings, and data management.
jd/CGT2/027
A-9
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PROJECT BUDGET
The total budget planned for the work
$475,000 divided as follows:
Independent
Escom Lab
Engineer
A detail of each of
Consultant
Labor Category
Class 9
Class 8
Class 4
Consultant
these follows:
Hours
16
245
260
Overhead - 134%
Total Overhead and Labor
Expenses
5 air fares @ 670
5 car rentals @ 45
5 days @ 21.25/day
Total Expense
Profit
Total
Escom Labs
Parameter
TIN
NH3
NO3
TSS
TP
Ortho P
BOD
MLSS/MLVSS
VSS
scope described is
$ 30,000
51,598
393,402
Hourly Rate
31.83
22.13
14.15
Lab Costs
Unit Price Tests
15.00
15.00
7.50
8.00
15.00
12.50
15.00
16.00
16.00
Assume 15% additional test on a non-
scheduled basis
A-10
Total
130
390
455
195
455
520
910
160
160
Cost
509
5,422
3,679
9,610
12,878
$22,488
$ 3,350
225
106
$ 3,681
3,831
$30,000
Cost($)
$ 1,950
5,850
3,413
1,560
6,825
6,500
13,650
2,560
2,560
$44,868
$ 6,730
$51,598
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Engineer
The cost for the Engineer includes Subcontractor and APCI
costs and is broken down by phases as follows:
PLANNING PHASE
Engineer Man Days $/Man Day $
E-4 Project Manager 31 149 4,619
E-7 Project Administrator 7 225 1,575
E-5 Project Consultant 18 171 3,078
0 - Office 3 66 198
TE -2 Technician 4 84 336
9,806
Subconsultant Man Days $/Man Day $
Subconsultant Coordinator 12 226 2,712
Lead Engineer 7 142 994
Technician 2 109 218
3,924
Labor Escalation
None - All activity in 1984
Overhead
Engineer - 9,806 x 1.62 = 15,885
McClelland - 3,924 x 1.10 = 4,316
Total Labor this Phase $33,931
INSTALLATION AND ACCLIMATION PHASE
Engineer Man Days $/Man Day $
E-4 Project Manager 21 149 3,129
E-7 Project Administrator 6 225 1,350
E-5 Project Consultant 6 171 1,026
E-2 Process Engineer 15 118 1,770
7,275
Subconsultant Man Days $/Man Day $
Subconsultant Coordinator 2 226 452
Lead Engineer 7 142 994
Technician 21 109 2,289
3,735
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Labor Escalation
None - All activity in
1984
Overhead
Engineer - 7,275 x 1.62 = 11,785
McClelland - 3,735 x 1.10 = 4,109
AP
Transport, hook-up, and installation
Acclimation
Engineer
Total this Phase
OPERATIONS PHASE
Man Days
$/Man Day
y
•
13,050
16,171
29,221
$56,125
E-4 Project Manager
E-2 Process Engineer
E-7 Project Administrator
E-5 Project Consultant
Subconsultant
59
140
15
25
Man Days
149
118
225
171
$/Man Day
8,791
16,520
3,375
4,275
32,961
Subconsultant
Lead Engineer
Technician
Coordinator 13
26
176
Labor Escalation
Engineer
McClelland
Overhead
Engineer
McClelland
AP
- 32,961 x 1.04 = 34,279
- 25,814 x 1.04 = 26,846
- 34,279 x 1.62 = 55,532
- 26,846 x 1.10 = 29,531
Maintenance
Tear down & shipping
Total
$15,000
6,000
$21,000
226
142
109
2,938
3,692
19,184
25,814
this Phase $167,188
A-12