HomeMy WebLinkAboutResolution - 2012-R0457 - Change Order To Contract - Archer Western Contractors Ltd.- Plant Digesters - 11_29_2012Resolution No. 2012-RO457
November 29, 2012
Item No. 5.9
RESOLUTION
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK:
THAT the Mayor of the City of Lubbock is hereby authorized and directed to
execute for and on behalf of the City of Lubbock, Change Order No. 2 to that certain
Contract No. 9835 by and between the City of Lubbock and Archer Western Contractors
Ltd., for the Southeast Water Reclamation Plant Digesters 8 and 9 Improvements Project,
and related documents. Said Change Order No. 2 is attached hereto and incorporated in
this resolution as if fully set forth herein and shall be included in the minutes of the City
Council.
Passed by the City Council on November 29, 2012
GLE OB TSON, MAYOR
I ATTEST:
Pebec a Garza, City Secreta
APPROVED AS TO CONTENT:
B Aia, �&
arsha eed, P.E., Chief Operating O ficer
APPROVED AS TO FORM:
Chad Weaver, Assistant City Attorney
vw:ccdocs/RES.Chg0rd#2-Archer Western Contractors, Ltd.
November 12, 2012
City of Lubbock, TX
Capital Project
Project Cost Detail
November 29, 2012
Capital Project Number: 92177
Capital Project Name: SEWRP Improvements Phase III Solids Handling
Encumbered/Expended
Carollo Engineers PC - Solids Engineering Study $
Carollo Engineers PC - Digester 8 & 9 Design
City of Lubbock Staff Time as of 11 / 12/ 12
Bid Cost
Carollo Engineers PC - Amendment No. 1
Archer Western Contractors, Ltd. Construction Contract
Change Order No. 1 with Archer Wester Contractors
Agenda Item September 13, 2012
Change Order No. 2 with Archer Western Contractors
Encumbered/Expended To Date
Estimated Costs for Remaining Appropriation
Remaining Appropriation
Total Appropriation
Budget
685,210
948,000
44,046
3,776
1,299,229
13,886,000
162,829
608,633
17,637,723
712,277
$ 18,350,000
CITY OF LUBBOCK
CHANGE ORDER
Change Order #: 2
Contractor:
Archer Western Contractors, LTD
Date:
November 9, 2012
BID/ITB/RFP #:
RFP #11-9835-MA
Contract #:
92177
Project Name:
Southeast Water Reclamation Plant
Digesters 8 and 9 Improvements Project
"Change Order" means a written order to a Contractor executed by the Owner in accordance with the contract authorizing an addition to,
deletion from, or adjustment or revision of the requirements of the contract documents, or an adjustment to the compensation payable to
Contractor, or to the time for performance of the contract and completion of the Project, or a combination thereof, which does not alter the
nature of the thing to be constructed and is an integral part of the project objective All work that biters the nature of the thin to to be
constructed or that is not an integral part of the oroiect objective must be let out for public bid. Description of change (alteration,
deviation, addition, or deletion) caused by conditions encountered during construction not covered by the specifications and
drawings of the project (attach additional pages ifnemsary):
Per attached backup material this Change Order #2 includes the following items: Item 1) Time Delays Resulting from Phase I Shut Down
Requests at no cost and 15 additional days. Item 2) Assist City with Sludge Flood Clean Up at a cost of $25,557.65 and 5 additional
days. Item 3) Additional Sludge Removal at Digester 8 at a cost of $583,075.19 and 45 additional days.
Where the Change Order is negotiated, the Change Order must be fully documented and itemized as to costs, including material quantities,
material costs, taxes, insurance, employee benefits, other related costs, profit and overhead. Where certain unit prices are contained in the
initial contract, no deviations are allowed in computing negotiated change order costs.
ITEMIZED COSTS MUST BE FULLY DOCUMENTED AND ATTACHED TO THIS FORM.
ITEM
DESCRIPTION
AMOUNT
A.
ORIGINAL CONTRACT VALUE:
$13,886,000
B.
AMOUNT OF THIS CHANGE ORDER: Cmated approval required ijover S25.000
$608,632.84
C.
PERCENT OF CONTRACT VALUE THIS CHANGE ORDER (B/A):
4.38%
D.
AMOUNT OF PREVIOUS CHANGE ORDERS:
$162,828.86
E.
TOTAL AMOUNT OF ALL CHANGE ORDERS (B+D):
$771,461.70
F.
PERCENT OF CONTRACT OF ALL CHANGE ORDERS (E/A): 25%Maximum
5.56%
G.
NEW CONTRACT AMOUNT (A+E):
$14,657,461.70
It is mutually agreed that the above dollar amount and the time extension, as applicable, as set forth in this Change Order constitutes full
compensation to the Contractor for all costs, expenses and damages to the Contractor, whether direct, consequential or otherwise, in anyway
incident to, or arising out of or resulting directly or indirectly; from the work performed or modified by the Contractor under this Change Order.
This ChangS Order is not valid without the following signatures Wease sign In order and return 3 orhdnals with Contract Cover Sheet to
Purchasing and CongractAfanagement Deaartment):
rrP W2, tt/2o/z
(1)CO RACTOR ate (2)PROJECTkRCHITECT/ENGINEER Date
Approved as to Conte Ap
(3)(PWNER'S R�F�SEWrjkTIVE �/ D (4) TrIY A
It /�„
(5) CAPITAL P OJECTS MANAGER Date (AC
Change Orders over 5,000 C ct Cover Sheet and the following signatures:
CTTYOFL , 1' /%,4�i�1 �.d..
(7) � yy ' �' r Hate (S) CiT�EeCe,RETARY
Cou Date: /Z" 7 ! Agenda item #: � , l
it «�Z
M
Da�
MANAGER Date
AM17-
7—
PWC-045 (Rev 01I08)
CITY OF LUBBOCK
CHANGE ORDER
Change (Eder #:
2 Contractor:
Archer Western Contractors, LTD
Date:
November 9, 2012
BID/ITB/RFP #:
RFP #11-9835-MA
Contract #:
92177
Project Name:
Southeast Water Reclamation Plant
Digesters 8 and 9 improvements Project
"Change Order" means a written order to a Contractor executed by the Owner in accordance with the contract authorizing an addition to,
deletion from, or adjustment or revision of the requirements of the contract documents, or an adjustment to the compensation payable to
Contractor, or to the time for performance of the contract and completion of the Project, or a combination thereof, which does not alter the
nature of the thing to be constructed and is an integral part of the project objective All work that alters the nature of the thin to o be
constructed or that is not wi integ awl part of the proiect objective must be let out for public bid. Description of change (alteration,
deviation, addition, or deletion) caused by conditions encountered during construction not covered by the specifications and
drawings of the project (aaach additional pages ifnecessary):
Per attached backup material this Change Order #2 includes the following items: Item 1) Time Delays Resulting from Phase I Shut Down
Requests at no cost and 15 additional days. Item 2) Assist City with Sludge Flood Ciean Up at a cost of $25,557.65 and 5 additional
days. Item 3) Additional Sludge Removal at Digester 8 at a cost of $583,075.19 and 45 additional days.
Where the Change Order is negotiated, the Change Order roust be fully documented and itemized as to costs, including material quantities,
material costs, taxes, insurance, employee benefits, other related costs, profit and overhead. Where certain unit prices are contained in the
initial contract, no deviations are allowed in computing negotiated change order costs.
ITEMIZED COSTS MUST BE FULLY DOCUMENTED AND ATTACHED TO THIS FORM,
ITEM
DESCRIPTION
AMOUNT
A.
ORIGINAL CONTRACT VALUE:
$13,886,000
B.
AMOUNT OF THIS CHANGE ORDER: Council aMroval required fover$25,000
$608,632.94
C.
PERCENT OF CONTRACT VALUE THIS CHANGE ORDER (B/A):
4.38%
D.
AMOUNT OF PREVIOUS CHANGE ORDERS:
$162,828.96
E.
TOTAL AMOUNT OF ALL CHANGE ORDERS (B+I)):
$771,461.70
F.
PERCENT OF CONTRACT OF ALL CHANGE ORDERS (E/A): 2541. Maximum
5.56%
G.
NEW CONTRACT AMOUNT (A+E):
$14,657,461.70
It is mutually agreed that the above dollar amount and the time extension, as applicable, as set forth in this Change Order constitutes full
compensation to the Contractor for all costs, expenses and damages to the Contractor, whether direct, consequential or otherwise, in anyway
incident to, or arising out of or resulting directly or indirectly; from the work performed or modified by the Contractor under this Change Order.
This Change Order is not valid without the following signatures fniease sten in ardor and return 3 originals whk Contrad Cover Sheet to
Purchasing and Contract Management De rtment ::
(i ON' CT R to (2) PROJECT ARCHrMCT/ENGiNEER Date
Appro ed as to Content: Appro 0
L J �0!( !3 Z_
WNER'S RES T1YE Da (4) Y A OR Y Da
(5) CAPITAL ROJFCTS MANAGER Date (6} P CHASI G D CONT CT MANAGER Date
Change Orders aver $25,00q1egyirg a Conydet Cover Sheet and the foJUVing signatures:
C1TY OF LUBBOCK
(7) MAYOR Date (8) CrrY S CRETARY j Date
Council l)gte: �' _ Agenda Item #; �5 . — Resolution #: 701Z eo
PWC-045 (Rev 01108)
CITY OF LUBBOCK
CHANGE ORDER
Change Order #: 2
Contractor:
Archer Western Contractors, LTD
Date:
November 9, 2012
BID/ITB/RFP #:
RFP #11-9835-MA
Contract #:
92177
Project Name:
Southeast Water Reclamation Plant
Digesters 8 and 9 Improvements Project
"Change Order" means a written order to a Contractor executed by the Owner in accordance with the contract authorizing an addition to,
deletion from, or adjustment or revision of the requirements of the contract documents, or an adjustment to the compensation payable to
Contractor, or to the time for performance of the contract and completion of the Project, or a combination thereof, which does not alter the
nature of the thing to be constructed and is an integral part of the project objective All work that alters the nature of the thing to be
construct d or that is not an integrml Dart of the project objective must be let out for public bid. Description of change (alteration,
deviation, addition, or deletion) caused by conditions encountered during construction not covered by the specifications and
drawings of the project (attach additional pages if necessary):
Per attached backup material this Change Order #2 includes the following items: Item 1) Time Delays Resulting from Phase I Shut Down
Requests at no cost and 15 additional days. Item 2) Assist City with Sludge Flood Clean Up at a cost of $25,557.65 and 5 additional
days. Item 3) Additional Sludgc Removal at Digester 8 at a cost of $583,075.19 and 45 additional days.
Where the Change Order is negotiated, the Change Order must be fully documented and itemized as to costs, including material quantities,
material costs, taxes, insurance, employee benefits, other related costs, profit and overhead. Where certain unit prices are contained in the
initial contract, no deviations are allowed in computing negotiated change order costs.
ITEMIZED COSTS MUST BE FULLY DOCUMENTED AND ATTACHED TO THIS FORM.
ITEM
DESCRIPTION
AMOUNT
A.
ORIGINAL CONTRACT VALUE:
$13,886,000
B.
AMOUNT OF THIS CHANGE ORDER: Couwu approval required f over $25,000
$608,632.84
C.
PERCENT OF CONTRACT VALUE THIS CHANGE ORDER (B/A):
4.38%
D.
AMOUNT OF PREVIOUS CHANGE ORDERS:
$162,828.86
E.
TOTAL AMOUNT OF ALL CHANGE ORDERS (B+D):
$771,461.70
F.
PERCENT OF CONTRACT OF ALL CHANGE ORDERS (F./A): 25%Maximum
5.56%
G.
NEW CONTRACT AMOUNT (A+E):
$14,657,461.70
It is mutually agreed that the above dollar amount and the time extension, as applicable, as set forth in this Change Order constitutes full
compensation to the Contractor for all costs, expenses and damages to the Contractor, whether direct, consequential or otherwise, in anyway
incident to, or arising out of or resulting directly or indirectly; from the work performed or modified by the Contractor under this Change Order.
This Chwge Order is not valid without the following signatures &hwe Amin order and ream 3 adeinak with Contracr Cover Sheet to
Purchasin and on d Mattagement Department): f J,4
(!) CO CT R ate (2) PROJECT A ARCHri'ECT/ENGINEER Date
Approved 0 to Content: Approvd! w/J%Fomt: f
( ER'S SE ' ATNE Date('(4) Y A ORN Date
11110a I
(5) CAPITAL PROJECTS MANAGER Date (6) IiASI D RACT MANAGER ate
Change Orders over $25,000 require a ct Cover Sheet and the following signatures.
CITY OF LUBBOCK t i A E :
Z CIT d rr 2.
(7) MAYOR j Date (8 S1 CRETARY
Council Date: Z, Agenda Item # , Resolution #: Z.OP lZ $S' }
PWC-045 (Rev 01I08)
Engineers... Working Wonders With Water'
November 13, 2012
Mr. Zoltan Fekete, P.E.
Senior Engineer
City of Lubbock, Texas
1625 13th Street
Lubbock, TX 79457
Subject: Southeast Water Reclamation Plant Digesters 8 and 9 Improvements Project
Change Order #2
Dear Zoltan:
Attached with this letter is documentation for Change Order #2.
Time
Item
Description
Cost Impact
Impact
Status
Time Delays Resulting from Phase I Shut Down
No Cast
+15 days
Recommended by
Requests
Carollo
2
Assist City with Sludge Flood Clean Up
$25,557.66
+5 days
Recommended by
Carollo
3
Additional Sludge Removal at Digester 8
$583,075.19
+45 days
Recommended by
Carollo
Total Contract Impacts from CO #2 Items:
+$608,632.84
1 +65 days
Items recommended for inclusion with Change Order #2 are described in more detail as follows:
Item 1
Archer Western is requesting a 15-calendar day time extension as a result of delays incurred in
the process of obtaining approval for the first Phase I demolition shut down. Archer Western
submitted its outage plan outlining the shutdown procedure for the digesters on July 12, 2011.
The plan was reviewed and approved. Archer Western submitted a shutdown request on July
18, for shutdown to occur on July 26. The request was resubmitted on July 19, but was not
approved due to plant operational concerns. The plan was revised as requested by the City, and
a third shutdown request was made on July 26. On August 1, 2011 the City informed Archer
Western that the demolition sequence from the Contract Documents was not acceptable. The
Engineer provided a revised sequence for which Archer Western was to provide a revised cost.
Since the City concerns were with sequencing that would occur in a later phase of the project,
the demolition sequence was re -affirmed, and Archer Western made a third shutdown request
on August 2. The first shutdown occurred on August 10, 2011. Archer Western has stated there
will be no additional cost associated with this time extension. The Engineer recommended
acceptance of the proposal.
8151A.301 Fekete005.docx 8911 Capital of Texas Highway North, Suite 2200, Austin, Texas 78759
P. 512,453.5183 F 512.453 0101
carollo.com
Mr. Zoltan Fekete, P.E.
Senior Engineer
City of Lubbock, Texas
November 13, 2012
Page 2
The following documents are attached to support Item 1:
1. Letter dated August 31, 2011 from Wayne Pursley of Archer Western Construction
Company with the delay timeline.
2. Letter dated October 31, 2011 from Han! Michel of Carollo Engineers with the Engineer's
response,to the proposal.
Item 2
Between July 22 and July 27, 2012, Archer Western assisted the City with cleanup of a large
amount of sludge that had overflowed from Digester 8 on two separate occasions. In both
cases, the overflow was the result of the Digester 8 overflow line being plugged with rags, a
condition that was of no fault of the Contractor or the City. The first overflow occurred on July 22
at 9:30 pm, resulting in flooding of the sludge recirculation pump pit. The second overflow
occurred on July 23, again at approximately 9:30 pm, resulting in lifting of the digester dome
(damaging all 24 hold-down connections in the process), and sludge spilling over the top and
into the plant road to the northeast. The cleanup response required as many as 18 personnel
per day between laborers, equipment operators, and management, and Archer Western spent a
total of 465 labor hours in the cleanup response. Archer Western provided a proposal for
reimbursement of $25,557.56 for labor, equipment, and pump rental, and five additional days for
the time and cost associated with the cleanup assistance. The Engineer recommended
acceptance of the proposal,
The following documents are attached to support Item 2:
1. Letter dated October 2, 2012 from David Teel of Archer Western Construction Company
with the proposal for reimbursement.
2. Proposal backup information.
3. Letter dated November 9, 2012 from Hani Michel of Carollo Engineers with the
Engineer's response to the proposal.
Item 3
Archer Western is requesting $583,057.19, and 45 additional calendar days as a result of the
additional costs and time associated with encountering a sludge in Digester 8 with much higher
solids content than assumed at bid (specifications state 10 percent solids would be the
maximum expected in a poorly -mixed anaerobic digester). The actual percent solids by weight
varied from 11 percent to 43 percent, indicating that no mixing had occurred for an extended
period of time. The work included processing 50 percent more volume from Digester 8 as a
result of the higher solids content. The Engineer recommended acceptance of the proposal. The
timeline of sludge removal efforts is summarized as follows:
8151A30 I Fekete005,docx.
carollo.com
Mr. Zoltan Fekete, P.E.
Senior Engineer
City of Lubbock, Texas
November 13, 2012
Page 3
August 22 —Archer Western began pumping sludge from Digester 8 to Digester 9.
• September 4 — The sludge had become too thick to pump to Digester 9.
• September 11 — Liquid Waste Management began pumping and dewatering sludge at a
level 10 feet above the cone.
• October 8 — Archer Western placed a small excavator in Digester 8, and began to
supplement sludge removal through the use of a skip pan and crane, hauling the
material to the existing SEWRP sludge drying beds for detention before hauling to
disposal.
• October 11 — The sludge level had reached 5 feet above the cone.
• October 23 — The sludge level had reached the top of the cone.
• November 2 — Liquid Waste Management stopped pressing, as there was too much grit
in the sludge. Archer Western continued to remove material with the skip pan.
• November 6 — Archer Western reaches the bottom of the cone.
The following documents are attached to support Item 3:
1. Letter dated November 9, 2012 from Wayne Pursley of Archer Western Construction
Company with the proposal for the work.
2. Proposal backup information.
3. Letter dated November 9, 2012 from Hani Michel of Carollo Engineers with the
Engineer's response to the proposal.
The change in contract price associated with Items 1 through 3 is summarized below:
• Original contract price : $13,886,000
• Net increase in price of this change order: +$608,632.84
• Contract price with all approved change orders: $14,657,461.70
• Original contract time: 510 Days to Final Completion
• Net increase of time with this change order: +65 days
• Contract time with all approved change orders: 613 days to Final Completion
8151A30 I Fekete005.docx
carollo.com
Mr. Zoltan Fekete, P.E.
Senior Engineer
City of Lubbock, Texas
November 13, 2012
Page 4
Please contact, Jason Anderson, or myself with any questions.
Thank you for the opportunity to provide construction phase services for the City of Lubbock
We look forward to continuing to work with you and City staff on this project through its
successful completion.
Sincerely,
CAROLLO ENGINEERS, INC.
Hani E. Michel, P.E.
Project Manager
JEA:ckt
cc: John Turpin, P.E.
Mary Gonzales
Gary Wheelwright
Jason Anderson, P. E.
8151A30 I Fekete005.uu;x
caroffo.com
Archer Western Construction Company
A Member of the Walsh Group
August 31, 2011
Carollo Engineers
8911 Capital of Texas Hwy North, Suite 2200
Austin, Texas 78759
Attn: Mr. Hani Michel, P.E.
Lubbock SEWRP Time Impacts
Mr. Michel,
Archer Western Construction is requesting a Fifteen (15) Day Contract Time Extension
Change Order be issued for delays incurred while attempting to schedule the initial Phase I
Demolition shutdown. Our claim is for lost time commencing July 26, 2011, ending on
August 9, 2011.
The timeline of events is as follows:
7/12/11- AWC submits its Initial Outage Plan outlining the first shut -down procedure
(Submittal #19).
7/15/11- Carollo returned Submittal #19 with no comments.
7/18/11- AWC requests a shut -down for 7/26/11. AWC was told that the submitted request
was not in the proper format. AWC revised the shut -down request in the desired
format.
7/19/11- AWC re -requests a shut -down for 7/26/11. The Carollo RE and AWC
Superintendent meet with the City. They are told the shut -down would not occur
as outlined in Submittal 19.
7/20 through 7/22- The AWC Superintendent and Carollo RE research the specified
requirements for Phase I shut -down and revise the shut -down work sequence in
accordance with the City wishes.
7/26/11- With the window of opportunity missed for any shut -downs in this week, AWC
makes its third shut -down request; now scheduled for 8/3/11.
8/1/11- AWC receives notice that the Demolition Sequencing in 01140 is not acceptable to
the City and the 8/3/11 shut -down is denied. Carollo revises the sequencing and
provides to AWC for pricing.
8/2/11- AWC receives notice that the revised shut -down as submitted was acceptable after
all. The concerns are centered around demolition sequencing that occurs later
than the immediate Phase I shut -down work. Again, the window of opportunity for
a shut -down in this week has been missed.
8/2/11- AWC makes its fourth shut -down request; now scheduled for 8/10/11.
8/10/11- The first, Phase I demolition shut -down occurs.
2121 Avenue "J" Suite 103
Arlington, Texas 76006
817-640-3898 (fax) 817-640-8734
An Equal Opportunity Employer
August 31, 2011
page2
This initial shutdown was critical path and its completion opened up many more areas of
work. The majority of Archer Western's field employees were loaned to other projects in the
area in an attempt to mitigate cost impacts incurred as a result of this lost time.
If you have any questions or require additional information, do not hesitate to contact our
office.
Sincerely
2tl t yn e- Auk
Wayne Pursley
Project Manager
Archer Western Construction Co.
DWTldwt
Cc: Jason Anderson, P.E.
Gary Wheelwright P.E.
Mary Clybum, P.E., B.C.E.E.
Zoltan Fekete, P.E.
David Argumaniz
David Teel
File
2121 Avenue V Suite 103
Arlington, Texas 76006
817-640-3898 (fax) 817-640-8734
An Equal Opportunity Employer
C Ca,.,., 110%
Engineers... Working Wonders With Wafer'
October 31, 2011
Wayne Pursley, Project Manager
Archer Westem Construction, LLC
3603 Guava Avenue
Archer Western Construction Trailer
Lubbock,TX 79404
Subject: Southeast Water Reclamation Plant Digesters 8 and 9 Improvements
PCM #1 — Time Delays Resulting from Phase I Shut Down Requests
Dear Wayne:
Archer Western is requesting a fifteen (15)-calendar day time extension be added to the
Contract between Archer Western and the City of Lubbock as a result of time delays incurred in
the process of obtaining approval for the first Phase I demolition shut down. Archer Western has
stated there will be no additional cost associated with this time extension. Carollo has reviewed
the request and generally agrees with the events described in the timeline presented in PCM
#1, and hereby recommends this PCM be included in a future Change Order to the Contract.
However, be informed that future conflicts on scheduling for shut -down must be brought
immediately to the attention of ENGINEER for prompt resolution to avoid unwarranted delays.
Sincerely,
CAROLLO ENGINEERS, INC.
Hani E. Michel, P.E.
Project Manager
JEA:ckt
cc: John Turpin, F.E.
Zoltan Fekete, P.E.
Mary Gonzales
Mary Clybum, P.E.
Jason Anderson, P.E.
8161AA 1 PwWr1 01.d=(
8911 Capital of Texas Highway North, Suite 2200, Austin, Texas 78759
P. 512.453.5383 F. 512.453.0101
carotlo.com
Archer Western Construction Company
A Member of the Walsh Group
October 2, 2012
Carollo Engineers
8911 Capital of Texas Hwy North, Suite 2200
Austin, Texas 78759
Attn: Mr. Hani Michel, RE
Lubbock SEWRP PCM #15- Clean Up Sludge Flood
Mr. Michel,
The Contractor respectfully submits the following cost proposal associated with the labor,
equipment and material costs incurred assisting the City in the clean up of the sludge floods
at Digester #8. These costs are: Twenty-five thousand, five hundred fifty-seven dollars and
Fifty-six cents ($25,557.56). An additional five (5) calendar days are requested in
association with this work.
If you have any questions or require additional information, please do not hesitate to contact
our office.
Sincerely
Vavid 7eee
David Teel
Project Engineer
Archer Western Construction Co.
DWT/dwt
Cc: Jason Anderson, P.E.
Gary Wheelwright P.E.
Mary Clyburn, P.E., B.C.E.E.
Zoltan Fekete, P.E.
David Argumaniz
Wayne Pursley
2121 Avenue "Jn Suite 103
Arlington, Texas 76006
817-640-3898 (fax) 817-640-8734
An Equal Opportunity Employer
C CarAA'19'%
Engineers... Working Wonders With Water'
November 9, 2012
Wayne Pursley, Project Manager
Archer Western Construction, LLC
3603 Guava Avenue
Archer Western Construction Trailer
Lubbock, TX 79404
Subject: Southeast Water Reclamation Plant Digesters 8 and 9 Improvements
PCM #15 — Assist City with Sludge Flood Clean Up
Dear Wayne:
Between July 22 and July 27, 2012, Archer Western assisted the City with cleanup of a large
amount of sludge that had overflowed from Digester 8 on two separate occasions. In both
cases, the overflow was the result of a plugged overflow line from Digester 8, a condition that
was of no fault of the Contractor or the City. The Contractor submitted PCM #15 on October 2,
2012 seeking to be reimbursed for the time and cost associated with the cleanup assistance.
Archer Western provided a proposal, with a cover letter, backup information and the
spreadsheet used to determine the price of $25,557.56, and five additional days for PCM #15.
The Engineer has reviewed the information provided with the proposal, and finds the cost and
time for the additional work to be reasonable, and hereby recommends this PCM be included in
a future Change Order to the Contract between Archer Western and the City of Lubbock.
Sincerely,
CAROLLO ENGINEERS, INC.
Hani E. Michel, P.E.
Project Manager
JEA: ckt
cc: John Turpin, P.E.
Zoltan Fekete, P.E.
Mary Gonzales
Mary Clyburn, P.E.
Jason Anderson, P.E.
Gary Wheelwright
David Teel
0151A.30JPWky019.daat 8911 Capital of Texas Highway North, Suite 2200, Austin, Texas 78759
P. 512.453.5383 F. 512.453.0101
carollo.com
141-k
S
w17T
ARCHER WESTERN CONTRACTORS
A, MEMBER OF THE WALSIA GROUP
November 9, 2012
Hani Michel, P.E.
Carollo Engineers
8911 Capital of Texas Hwy North, Suite 2200
Austin, Texas 78759
Ref: Lubbock SWWRP
Digesters 8 & 9 Improvements Project
Subject: Digester 8 Sludge Removal
Dear Hani;
Attached find our revised pricing for the additional costs associated with the increased
sludge solids content encountered in Digester 8. This cost proposal includes the costs
associated with removing the additional 5 feet in the Digester 8; and the additional costs for
sludge removal, sludge processing, sludge hauling and tipping fees for the portion of the
sludge above 10 percent solids. During the removal process, we encountered sludge solids
contents ranging from 11.4 percent up to 43.1 percent. These elevated sludge
concentration levels increased the total amount of dewatered sludge that had to be hauled
to the landfill. In addition since sludge contents above 10 percent could not be pumped from
the tank, more costly methods had to be utilized to remove the sludge from the digester.
The cost for this additional work is $583,075.19. These costs are broken out in the attached
spreadsheets. Along with the additional costs, we are requesting an additional 45 calendar
days for Substantial and Final Completion. If you have any questions regarding this
proposal, please let me know.
Sincerely,
W41teP=64
Wayne Pursley
Archer Western Contractors, Ltd.
Project Manager
CC: File
2121 Avenue "J" Suite 103
Arlington, Texas 76006
817-640-3898 (fax) 817-640-8734
An Equal Opportunity Employer
DIGESTER 8 SLUDGE REMOVAL COST PROPOSAL
111712012
OWNER: CITY OF LUBBOCK
Project RFP 11-8835-MA
ENGINEER: CAROLLO ENGINEERS
CONTRACTOR: ARCHER WESTERN CONSTRUCTION
2121 AVENUE J, SUITE #103
ARLINGTON, TEXAS 76006
COST SUMMARY
Description
Qly
Unit
Unit/Price
Totals
Actual Cost for Sludge Removal, Dewatering, Disposal and Digester Cleaning
Average solids concentration in Digester 18.6%
1,167,770
Gallons
$ 0.65
$761,817.11
Deduct Original Bid Sludge Removal, Dewatering, Disposal and Digester Cleaning
Solids Concentration not to Exceed 10% per Contact Requirements
744,758
Gallons
$ (0.24)
($178,741.92)
Total This Change
1 $583,075.19
45 Additional Days Requested for Substantial and Final Completion
SEWRP DIGESTERS 8 & 9 IMPROVEMENTS PROJECT
CONTRACT NO. 9835
OWNER_ CITY OF LUBBOCK
ENGINEER: CAROLLO ENGINEERS
CONTRACTOR: ARCHER WESTERN CONSTRUCTION
2121 AVENUE d, SUITE #103
ARLINGTON, TEXAS 76006
Descri tion
Qty
1.00
Unit
LS
$
UnittPrice
151,130.59
$
AW Total
151,130.59
Subcontractor
$
Totals
151,130.59
�` °
Sludge Removal Costs to Drying Beds(Sludge not pumpable over 10% solids)
Landfill Tipping Fees
3.000,00
TN
$
25.14
$
75,420.00
$
75,420.00
Flex Base (Placed in Digester for Backhoe)
160.00
TN
$
14.00
$
2,240.00
$
2,240.00
Load Remaining Sludge at Drying Beds and Clean Up (reference Sht #4)
1.00
LS
$
5,225.83
$
5,225.83
$
5,225.83
Extended Overhead Costs
31.00
Days
$
1,793.75
$
55,606.25
$
55,606.25
Waste Management Additional Hauling (20 Tons1 Load)
150.00
Loads
$
57&00
$
85,500.00
$
85,500.00
.Liquid
Liquid Waste Management Belt Press Processing Costs (Labor,Equi ment,etc)
650,000.00
Gallons
$
0.39
$
253,500.00
$
253,500.00
Liquid Waste Management OH&P (15%)
1.00
LS
$
50.850.00
S
50,850.00
S
-
$
-
TOTAL DIRECT COSTS:
OH&P @ 15% on AW Work (Less Extended Overhead Portion)
OH&P @ 10% on AW Work (Extended Overhead Portion)
OH&P @ 5% on Subcontractor Work
Subtotal:
Insurance 3%
$
289,622.67
$
389,850.00
$
679,472.67
$
35,102.46
$
5,560.63
$
19,492.50
$
739,628.26
$
22,18&85
TOTAL AMOUNT THIS COST PROPOSAL SUMMARY ...............................
$
761,817.11
SLUDGE REMOVAL COSTS TO DRYING BEDS
-These cast are actual costs for removing the sludge from the digester and transporting them to the drying beds. This was required
due to the Increased solids concentration in the digester. Solids concentrations above 10% could not be pumped from the
Digester as originally anticipated.
-The method used was placing a small excavator inside the digester on a flex base pad and usingthe excavatorto load skip pans
which were flown out with the crane and then transported to the drying beds with a rubber tire loader. The skip pans were emptied
into the drying beds. The sludge was then loaded into haul trucks and transported to the landfill in Canyon, Texas.
REMOVAL TO DRYING BEDS
TOTAL # of Hours 302
Total q of flays 31 10/5/12 Thru 11/9
LABOR
Hourly Rate
Hours
Total
Labor Burden 55%
Total
Crane Operator
$ 34.66
302
$ 10,465.86
$ 5,756.22
$ 16,222.09
Loader Operator
$ 2039
302
$ 6,279.52
$ 3,453.73
$ 9,733.25
Excavator Operator
$ 23.10
302
$ 6,977.24
$ 3,837.48
$ 10,814.72
Bobcat/Broom Operator
$ 23.10
302
$ 6,977.24
$ 3,837.48
$ 10,814.72
Foreman/Crane Flagger
$ 23.10
302
$ 6,977.24
$ 3,837.48
$ 10,814.72
Ground Hand
$ 18.48
302
$ 5,581.79
$ 3,069.99
$ 8,651.78
Subtotal Labor $ 67,051.29
EQUIPMENT
Daily Rate
Days
SubTotal
Operating Expense (50% for fuel
and equipment maintenance)
Total
Crane Linkbelt L5218
$ 766.67
31
$ 23,766.67
$ 11,883.33
$ 35,650.00
Loader Volvo L90
$ 366.67
31
$ 11,366,67
$ 5,683.33
$ 17,050.00
Excavator Kubota KX71
$ 154.87
31
$ 4,800.87
$ 2,400.43
$ 7,201.30
Bobcat
$ 146.67
31
$ 4,546.67
$ 2,273.33
$ 6,820.00
Steet Broom
$ 120.00
31
$ 3,720.00
$ 1,860.00
$ 5,590.00
Subtotal Equipment $ 72,301.30
DIRECT EXPENSES
Subsistance at $2.5/MH
$ 4,530.00
Small Tools at $2/MH
$ 3,624.00
Safety Supplies at $2/MH
$ 3,624.00
Total
$ 11,778.00
TnTAIC
Labor
$ 67,051.29
Equipment
$ 72,301.30
Indirect Expenses
$ 11,778.00
TOTAL
$ 151,130,59
EXTENDED OVERHEAD COSTS (COMBINATION SLUDGE DRYING BEDS AND BFP)
Extended Overhead Labor
Monthly Rate
Labor Burden 55%
Total Per Month
Months
Total
Project Supt
$
7,900.00
$
4,345.00
$
12,245.00
1.0
$
12,472.30
Project Engineer
$
7,100.00
$
3,905.00
$
11,005.00
1.0
$
11,209.28
Field Engineer
$
6,000.00
$
3,300.00
$
9,300.00
0.0
$
-
Project Manager
$
10,000.00
$
5,500.00
$
15,500.00
1.0
$
15,500.00
Secretary
$
3,800.D0
$
2,090.00
$
S,890.00
I _1.01
$
5,999.33
Total Labor
$
45,180.91
Overhead Expenses
Monthly Rate
Months
Total
Project Supt Job Truck
$
850.00
1.0
$
865.78
Project Engineer Job Truck
$
850.00
1.0
$
865.78
Project Manager Job Truck
$
850.00
1.0
$
850.00
Truck Fuel
$
2,350.00
Office Trailer Carollo
$
350.00
1.0
$
356.50
Office Trailer AW
$
350.00
1.0
$
356,50
Subsistance $4/MH
$
1,943.76
1.0
$
1,979.84
Phones 3 at $100/Month
$
300.00
1.0
$
305.57
Internet
$
600.00
1.0
$
611.14
Temporary Toilets
$
250.00
1.0
$
254.64
Office Supplies
$
250.00
1.0
$
254.64
Rubbish Boxes
$
750.00
1.0
$
763.92
Internet
$
600.00
1.0
$
611.14
TOTALS
$
10,425.44
TOTAL LABOR
$
45,180.91
TOTAL OTHER
$
10,425.44
TOTAL EXTENDED OVERHEAD
$
55,606.35
Average Cost per Day $ 1,819.77
LOAD REMAINING SLUDGE @ DRYING BEDS AND CLEAN UP
These are costs associated with loading the remaining sludge in the drying beds after the removal from the digester was completed. Costs for
pressure washing and cleaning the construction equipment are also included.
LABOR
Hourly Rate
Hours
Total
Labor Burden 55
Total
Loader Operator
$ 20.79
33
$ 686.17
$ 377.39
$ 1,063.57
Bobcat/Broom Operator
$ 23.10
16
$ 369.66
$ 203.31
$ 572.97
Clean Equipment/Drying Beds
$ 14.00
24
$ 336.00
$ 184.80
$ 520.80
TOTAL
$ 2,157.33
EQUIPMENT
Daily Rate
bays
SubTotal
Operating
Expense (50%)
Total
Loader Volvo L90
$ 366.67
3
$ 1,100.00
$ 550.00
$ 1,650.00
Bobcat
$ 146.67
5
$ 733.33
$ 366.67
$ 1,100.00
TOTAL
I $ 2,750.00
DIRECT EXPENSES
Subsistance at $2.5/MH
$
122.50
Small Tools at $2/MH
$
98.00
Safety Supplies at $2/MH
$
98.00
Total
$
318.50
TOTALS
Labor
$
2,157.33
Equipment
$
2,750.00
Indirect Expenses
$
318.50
TOTAL
$
S,225.83
Estimate 9-12 days of hauling sludge after digester is empty
CALCULATION OF ADDITIONAL DAYS (BFP and Drying Beds)
DIGESTER 9 EXPERIENCE
Volume Removed
3,285,240
Gallons
Time for Removal (Start 9/26 - Complete 1/13) 109 days less 10 days
(holidays/Weather)
99
Calendar Days
Volume Removed per Day
33,184
Gal/Calendar Day
DIGESTER 8 ORIGINAL
Volume (5' above cone plus cone)
744,758
Gallons
Anticipated Volume to Remove per Day
33,184
Gal/Calendar Day
Anticipated Days
22.44
Calendar Days
Volume Added for Additional 5 Feet
Added Volume (Additional 5 feet)
423,012
Gallons
Days to Transfer Volume to Digester 9
2
Days
TOTAL ORIGINAL DAYS 24.44
DIGESTER 8 ACTUAL
START DATE
9/12/2012
Anticipated Completion Date
11/6/2012
Subtotal Days
55
TOTAL Additional Days for Extended Overhead
31
Additional Days for Time Spent Transfering to Digester 9
14
TOTAL Days Requested
45
All Testing by Advanced Analysis, Inc
Test Method: EPA 600/4-79-020 SM2540 B
Samples taken directly from tank or from skip pan as it was removed from tank
Sample Date
Percent Solids by Weight
9/25/2012
11.4
10/1/2012
13.4
10/1/2012
11.0
10/1/2012
14.0
10/3/2012
14.6
10/3/2012
8.9
10/3/2012
10.5
10/18/2012
13.3
10/19/2012
13.4
10/22/2012
15.8
10/23/2012
18.3
10/24/2012
21.4
10/25/2012
22.6
10/26/2012
23.3
10/29/2012
20.5
10/31/2012
25.6
11/1/2012
24.4
11/2/2012
27.3
11/5/2012
43.1
Average Reading 18.57
Engineers... Working Wonders With Water'
November 9, 2012
Wayne Pursley, Project Manager
Archer Western Construction, LLC
3603 Guava Avenue
Archer Western Construction Trailer
Lubbock, TX 79404
Subject: Southeast Water Reclamation Plant Digesters 8 and 9 Improvements
PCM #18 — Additional Sludge Removal at Digester 8
Dear Wayne:
The Archer Western Construction bid for project Item No. 4 (sludge removal, dewatering and
disposal, and digester cleaning) was based on a specified solids content in the digesters of up
to 10 percent; corresponding with what is typically expected to be encountered in a poorly -
mixed anaerobic digester. The solids content of Digester 9 was below 10 percent, and the
Contractor was able to remove, dewater, and dispose of the solids from Digester 9.
Once improvements to Digester 9 were complete, it was planned that the Contractor would
transfer sludge from Digester 8 to the newly -refurbished Digester 9, with sludge transferred from
Digester 8 until reaching a level five feet above the cone of the digester. However, upon
commencing transfer, the sludge in Digester 8 was found to be much thicker than that
encountered in Digester 9, resulting in both a limit of how much material could be transferred to
Digester 9, and an increased effort to transfer the material that could be pumped. Once the
limits of transfer were reached, sludge still remained in Digester 8 to a level 10 feet above the
cone, not 5 feet above the cone; This fact alone meant that there would be approximately 50
percent more volume to be removed from Digester 8 and dewatered than assumed at bid time.
In addition to the sludge volume, it was determined that the solids content of the sludge in
Digester 8 was consistently above 10 percent, and ranged from 11 percent solids near the top,
to as high as 43 percent solids near the bottom in the cone of the digester. Higher percent solids
result in a larger amount of solids that must be hauled to the landfill. To put it in perspective, a
sludge at 20 percent solids contains twice as much solid material as sludge at 10 percent solids,
and therefore requires double the number of truck loads to be hauled to the landfill. The higher
percent solids are indicative of an anaerobic digester with no mixing, likely for an extended
period of time.
The time and effort required to remove, dewater, and dispose of the sludge from Digester 8 was
well in excess of what was anticipated in the bid. The Contractor submitted PCM #18 on
November 9, 2012 seeking to be reimbursed for the time and cost associated with the additional
solids removed from Digester 8.
8151A.3Ui PumleyO&docx 8911 Capital of Texas Highway North, Suite 2200, Austin, Texas 78759
P. 512.453.5383 F. 512,453.0101
carollo.com
Wayne Pursley, Project Manager
Archer Western Construction, LLC
November 9, 2012
Page 2
The Contractor provided a proposal, backup information, and the spreadsheet used to
determine the additional cost of $583,075.19, and 45 additional days to complete the work
(PCM #18). The Engineer has reviewed the information provided with the proposal, and finds
the cost and time for the additional work to be reasonable based on the unforeseen conditions
encountered in Digester 8, and hereby recommends this PCM be included in a future Change
Order to the Contract between Archer Western and the City of Lubbock.
Sincerely,
CAROLLO ENGINEERS, INC.
j1
� V.
v
Hani E. Michel, P.E.
Project Manager
JEA:ckt
cc: John Turpin, P.E.
Zoltan Fekete, RE.
Mary Gonzales
Mary Ciyburn, P.E.
Jason Anderson, P.E.
Gary Wheelwright
David Teel
8151A.30 I Pursfey020.docx
carol I O.com