HomeMy WebLinkAboutJC Constructors Change Order No. 11 WRRF Liquid Stream Capacity ExpansionM
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IAN
CITY OF MERIDIAN
33 EAST BROADWAY
MERIDIAN,ID 83642
CHANGE ORDER
CHANGE ORDER NO.11
PROJECT NO.10601.D
CHANGE ORDER DATE:9t23t2019
EFFECTIVE DATE:9t23t2019
CONTRACTOR JC Constructors lnc.
PROJECT: WRRF Liquid Stream Capacity Expansion
The Contractor is hereby directed to make the following changes from the Contract Documents and Plans.
Description of additional work; (attach additional pages if needed)
Please see attached sheet.
WHO REQUESTED THE CHANGE E CitY E Contractor
WHY IS THE CHANGE NECESSARY
Ch*k all that apply
E Unforeseen / Hidden Conditions E Scope Change
g Other - descibe belowE Error with the Plans and/or Specifications
Explanation:
This change order includes Change Proposal Requests (CPR) 26,63, 87,92A, 93A, 94, 95A, 96, 97A, 99, 100, 101,1O2,103, 104,
106, 107, 108, and 109. Please see the attached explanation sheet.
REASON FOR CHANGE ORDER VS. BIDDING ADDITIONAL WORK
Check all that apply
E The work is in the area of the original contract and a conflict with the on-site contractor is probable and
would make coordination of work difficult and bidding unreasonable.
El Time is of the essence and bidding would require the contractor to stop work and the City would face
costly standby fees therefore making bidding disadvantageous
E Emergency Work to correct unsafe conditions.
E Other - describe below
ExplanatiOnl (attached additional pages if needed)
See Attached Change Order Summary
Page 1 of2
IDAH()
Meridian City Council Meeting Agenda November 6, 2019 – Page 500 of 610
CHANGE IN @NTRACT PRICE:
Original Contrac{ Prie:$35,565,000.0q
CHANGE IN CONTRACT TITIES:
days896Odginal Contraci Timeg:
Net changes from prwirrs ClrarEB mcrs
$1,156,560.46@
No. 1 to No.
Net changes furm previous Change Oders (calcnderda:p)
No. 1 to No. 10
Nddlie.od..m5mLr 147 days
Net lncrcage (deooasef of thls Change Orden
$441,997.03
EE abllr lluri d ura cnllroc ordar
l{otlncrurce (dccrl.ce} of thlr Ghangs Onbc
(cdondrrd.Fl
1@ dayr
Total Change (lncrease / decrease) to dde:
$1,598,557.49
TotalDays (lncrease /deqeas€) to date:
(cahrxlBrday3)
255 days
ilew Conhact Tlmc wltfi all Approrrcd Changc Onders:
(c.hndrr dtlt)
'l{51 daya
New Contract Price wtth 3ll lpprcved Ctrngp Ordens:
$37,163,557.49
(City Pudrsshg iran{q}
Keith Watts
(Contrector)/ul-
lo
7,"liA4
RECOMMENDED: (CiUProfr:ctManagcr) *.q lonre nppnoveD BY couNctL (rf ruqulrcd)
I
INo SIGNATURE REoUIRED
loott,oau: 1177/11
By:U i4\-
Date lssued:
FY
Submitted to Clerk br{genda:
Order No.
Amendment:
Approval
Avallable (Attach Report)
lnformatlon: Budget
Page2of 2
TIETHOD OF COST DETERTINANOil
'
COST ANALYSIS OR VERIFIGATION:
Please see attached sheet.
Meridian City Council Meeting Agenda November 6, 2019 – Page 501 of 610
Change Proposal Requests (CPR) and Field Orders
CPR #26 - Multi-Parameter Analyzer Analog Signals
Description Summary:
Work includes the replacement of an ethernet connection multi-parameter analyzer with a 4-20 mA analog
signal multi-parameter analyzer.
Why is Change Necessary:
This change is a Scope Change to the Contract, as the original design included the use of an ethernet
connection with a pro-soft converter for the multi-parameter analyzers, but was changed to an analog
signalduring shop drawing review.
Reason for change:
Within the RASMAS Station 2 UV Disinfection area, the multi-parameter analyzers were designed to
communicate with the CoM PLCs via an ethernet connection with a pro-soft convertor. Due to the
convertors requiring separate set-up and programming, that can be very difficult and costly, Jacobs
suggested switching to a hardwired analog signal that would be similar to what is currently existing at the
plant, as well as being more cost efficient over the life of the instrument.
Cost Negotiation Process:
JCC initially submitted CPR 26 to the City PM, City inspector, and B&C for their review and comment.
Labor cost breakdowns and material costs were provided to the reviewers. The proposed costs were
found to be appropriate for the scope of work. The CPR was recommended by B&C and the costs were
approved.
Final Cost=
DaYs=
$6,685.98
0
Meridian City Council Meeting Agenda November 6, 2019 – Page 502 of 610
CPR #63 - ML Collection Ghannel Pipe Supports
Description Summary:
Work includes the fabrication and installation of seven Mixed Liquor Collection Channel and Aeration
Basin Air piping supports.
Why is Change Necessary:
This change is an Error/Omission and Scope Change. The structuraldrawings included and clearly
showed the pipe support details for the aeration basin air piping supports along the east side of the
basins, however, the location and number of pipe supports were not clearly shown on the plan view. JCC
raised the question and was provided in answer via RFI #209, atwhich point JCC indicated that they did
not include these supports within their bid pricing. lf this would have been apparent at time of bidding, the
City would have paid for these costs and as such are accepting of paying for the requested change.
Reason for change:
The air piping supports are necessary to provide the structural support necessary for the air piping located
within the Aeration Basins and the Mixed Liquor Collection Channel. The air piping is going over the top of
the Aeration Basins to allow for foot and vehicle traffic to occur along the Basin walkways and driveway for
necessary maintenance and daily operation duties. Revisions to the structural pipe support detail allowed
for the supports to be fabricated out of stainless steel (at or near water surface) and coated carbon steel
(above water surface) to minimize the costs of material (versus using all stainless steel). This change also
includes adding an epoxy coating to the galvanized bottom 4' of the galvanized pipe bridge structure
where it is located at or near the water surface. The addition of four stainless steel backing plates on the
pipe supports for the air piping located within the ML collection channelwas also incorporated. These
plates add necessary stiffness to the pipe support system, allowing for thermal expansion and contraction
in the air piping. These plates were chosen over an anchoring system, which would have required
anchoring the pipe supports to the channelwall, opening up the potentialfor leaks to occur in the future.
Cost Negotiation Process:
JCC submitted CPR 63 to the City PM, City inspector, and B&C for their review and comment. Labor cost
breakdowns and material costs were provided to the reviewers. The proposed material costs were found
to be consistent and appropriate for the work being requested. The CPR was recommended by B&C and
the costs were approved by the CoM.
FinalCost= $115,195.52Days= 30
Meridian City Council Meeting Agenda November 6, 2019 – Page 503 of 610
CPR #87 - Conduit for Aeration Basins 9-12
Description Summary:
Work includes the procurement and installation of electrical conduit within the future Aeration Basin 9-12
channel walls. Conduits will be located within the walls and walkway of the future channel walls and will be
capped and plugged at the end of each wall segment.
Why is Change Necessary:
This change is a Scope Change/Owner Directed. JCC was asked to initially price allassociated conduit
extensions, handholes, and vaults from the new Blower Building to the Future Aeration Basins 9-12. The
price came in higher than anticipated, so the City rejected this Change. JCC was asked to modify their
pricing to only reflect the installation of conduit within the channel walls. This significantly reduced the cost
of the Change and allowed for future electrical installation to be much smoother and avoids having to use
a more costly rigid PVC coated galvanized conduit for installation along the exterior basin walls.
Reason for change:
By adding the additionalelectrical conduit into the future Aeration Basin 9-12 walls, the City is provided a
better product as opposed to installing a galvanized coated conduit on the exterior Basin/Channelwalls.
The embedded conduit is better protected and better suited considering the off gasing of the process
stream. lt was more cost effective to have the conduit embedded now, under the current JCC Contract,
versus trying to manage the installation of the conduit in the future.
Cost Negotiation Process:
JCC initially submitted CPR 60 to the City PM, City inspector, and B&C for their review and comment. This
CPR was priced at about $153,000. CPR #60 was rejected and JCC was asked to revise the pricing to
reflect only conduit installation. JCC resumbmitted under CPR #87. The pricing came in over $100,000
less than the initial pricing. Backup documentation was provided to the reviewers. The proposed cost was
found to be appropriate for the scope of work and materials/equipment being provided, thus being
recommended by BC. Challenger's pricing was reflective of the same scope of work they completed for
Aeration Basins 5-8, which was going to be mirrored for the scope of work for Aeration Basins 9-12. The
CPR cost was approved.
FinalGost= $46,452.93Days= 0
Meridian City Council Meeting Agenda November 6, 2019 – Page 504 of 610
CPR #92A - Relocation of 8-inch PW east of 36-inch RAS
Description Summary:
This change includes the Relocation of the existing 8-inch Potable Water line by installing City Owned 10-
inch HDPE pipe approximately 1S-feet east of the newly installed 36-inch RAS line, on the east side of the
New Blower Building. Changes also included installation of additional isolation valves, provided by the
City, as well as the extension of the designed Reuse Water line south, beyond the concrete pad of the
Chemical Feed Building.
Why is Change Necessary:
This is an Unforseen/Hidden Conditions Change. The Construction plans showed the Existing PW line on
the east side of the designed 36-inch RAS line. Upon construction activities in the area, JCC potholed in
the area and field verified that the 8-inch PW line, which parallels the 36-inch inch RAS line, was located
on the west side of the 36-inch RAS line. Because of the close proximity of the 36-inch RAS line (Non-pot
line) and the 8-inch PW line (potable line) the PW line needed to be relocated.
Reason for change:
Based on the field location verification completed by JCC, the City found that the location of the existing 8-
inch PW line, in relation with the location of the 36-inch RAS line, did not meet the necessary vertical and
horizontal seperation requirements put in place by DEQ. The City identified that the best course of action
was to relocate the existing 8-inch PW to the east side of the 36-inch RAS line, in the originally assumed
location (approximately 15 feet away from RAS line location). At this time, the City also identified that the
1O-inch HDPE pipe, on site at the WRRF, could be utilized to help keep materialcost down. Additional
isolation valves were installed to provide additional operation flexibility to the system. The additional Reuse
Water line to be extended will allow for future tie-ins to this infrastructure to be done in a more cost
effective manner, as the need to expose the line under the chemical feed concrete pad will be avoided.
Cost Negotiation Process:
JCC submitted CPR 92 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The City identified the ability to save
on materialcosts by utilizing existing 1O-inch HDPE already on site and owned by the City. The additional
isolation valves were also already City owned, offering the additional operaiton flexibility at a reduced cost.
The proposed time and costs were reviewed and are considered to be in line with the standard for this
type of work. The proposed cost was found to be appropriate and was recommended for approval by BC.
The CPR cost was approved.
FinalCost= $45,763.61
Meridian City Council Meeting Agenda November 6, 2019 – Page 505 of 610
CPR #93A - Relocate Existing PW line at 66-inch SE Grossing
Description Summary:
This Change Request is for the relocation (vertically) of the existing 8-inch potable water line at the 66-
inch secondary effluent crossing by using four 4S-degree bends. This relocation will provide +18-inches of
vertical seperation between the potable water line and the 66-inch secondary effluent line, to meet DEQ
requirements and standards.
Why is Change Necessary:
This is an Unforseen/Hidden Conditions Change. The construction plans had called out the existing 8-inch
potable line at an elevation (t.o.p - 2545.3' invert - -2544.63') however, field verification showed that the
potable water line was actually at an invert elevation of 2542.9' (t.o.p - -2543.57'). Because of the actual
location, it was decided that the more cost effective solution, to avoid the conflict, was to lower the water
line to run underneath the 66-inch secondary effluent line.
Reason for change:
The 66-inch secondary effluent pipe was a fixed elevation pipe due to manhole connection points on the
upstream/downstream segments of the pipe. Due to the potable water line being at a lower elevation than
initially thought during design, the two lines did not meet the necessary vertical (18-inches) seperation
requirements per DEQ. ln order for JCC to move forward with installation of the 66-inch SE pipeline, they
needed to lower the 8-inch potable line to run underneath the 66-inch to meet DEQ seperation
requirements, as well as provide enough cover over the top of the water line.
Cost Negotiation Process:
JCC submitted CPR 93 to the City PM, City inspector, and B&C for their review and comment. Material
costs were provided and were consistent with previous utility conflict pricing we have seen, from JCC, on
the project. The proposed pricing was found to be appropriate and was recommended for approval by BC.
The CPR cost was approved.
FinalCost= $20,254.24
4
Meridian City Council Meeting Agenda November 6, 2019 – Page 506 of 610
CPR #94 - SSTL Stilling Wellwithin Secondary Scum Pump Station
Description Summary:
Work includes the fabrication and installation of a 6-inch SSTL stilling well within the Secondary Scum
Pump Station. A credit was provided for the PVC materials that were not utilized.
Why is Change Necessary
This is a Scope change to the Contract. The standard detail for the stilling well did not specify a specific
material to be utilized. JCC planned to utilize a Schedule 80 PVC, which was specified for similar
instrumentation details on the project. Due to the nature of the scum, B&C recommended the use of
Stainless Steel in lieu of the PVC.
Reason for change:
JCC had initially suggested using a PVC pipe stilling well and mounting the radar level transmitter to the
top of the scump pump station vault. BC had concerns with achieving level accuracy with that approach.
Also, the structural mounting and durability of that configuration was less than ideal. BC recommended the
use of a stainless steel pipe for the stilling well and attaching the radar level transmitter directly to the
stilling well. The change in material and change in location of the level transmitter will provide an improved
installation.
Cost Negotiation Process:
JCC submitted CPR 94 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed time and costs were
reviewed and are considered to be in line with the standard for this type of work. The proposed cost was
found to be appropriate and was recommended for approval by BC. The CPR cost was approved.
FinalGost= $4,213.08Days= 0
Meridian City Council Meeting Agenda November 6, 2019 – Page 507 of 610
CPR #95A - 48-inch SE and 36-inch RAS Conflict
Description Summary:
Work includes the procurement and installation of a 48-inch SRPE vertical bend on the 48-inch secondary
effluent line as it was connected to the 144-inch manhole structure east of the RAS Transfer Station and
downstream of the new Secondary Clarifiers. Additional work included modifications to the slope of the 48-
inch SE line as it was installed towards the manhole structure.
Why is Change Necessary:
This change falls under the "Other" category for classification of the change. The change request was the
result of a pipe conflict, between the 36-inch RAS and 48-inch Secondary Effluent line, that JCC identified
during the installation of the 48-inch Secondary Effluent line. The 36-inch RAS line was installed during the
summer of 2018 and the 48-inch SE was installed during the Spring of 2019. JCC indicated they had no
means (per plans) of identifying they were supposed to install the 36-inch RAS at an elevation that was
lower than the 48-inch SE line.
Reason for change:
JCC installed the 36-inch RAS line (leaving RAS Transfer heading towards the RASM/AS Station 2) in the
Summer of 2018. They installed the 48-inch Secondary Effluent line in the Spring ot 2019. JCC identified
that they had a elevation conflict between the two lines as they were nearing the proposed location of the
144-inch manhole structure. BC provided point elevations for the 36-inch RAS line showing a flat profile
from point 26 (C-100-0021) to the RAS Transfer Station, as wellas a profile showing the RAS line to be
installed under the 48-inch SE. JCC argued that they missed the elevation profile, but would have caught
the conflict had they been provided point elevations for this crossing, similar in nature to other
horizontal/vertical bend locations on the plan sheets. As the 36-inch RAS line was already fully installed,
the only identifiable solution was for JCC to install the 48-inch SE at a flatter slope and to install a drop
fitting on the 48-inch to avoid the pipe conflcit and continue the tie-in to the 144-inch manhole at the
designed elevation.
Cost Negotiation Process
JCC initially submitted CPR 95 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are consistent with pricing received on this project previously for similar work. A
meeting was held between the CoM, BC, and JCC to discuss why the conflict wasnt identified early in the
project. JCC commented that had they been provided elevation points, they would have known that a
vertical drop would have been required (or an adjustment to the slope of either line). BC commented that
the profile sheet took the place of the point elevation needs. The CoM and JC negotiated a reduced price,
which is relfected in the CPR 95A on the basis that the fitting and labor associated with the connection of
the fitting would be paid for as the CoM would have paid for that type of material/fitting at time of bidding
as well as the complexity of this type and size of project JCC reduced the CPR by 50% while also
providing air release/relief valves on the 48-inch SE to allow the expelling of air from the line to counter act
that high point created with the drop fitting. The City accepted the reduced costs of the change.
FinalGost=
Days=
${2,350.00
5
Meridian City Council Meeting Agenda November 6, 2019 – Page 508 of 610
CPR #96 - Non Potable Water Gate Valves
Description Summary:
Work includes the procurement and installation of an additional six, 6-inch and four, 8-inch gate valves on
the non-potable system.
Why is Change Necessary:
This is a Scope Change/Owner Directed Change. During a progress meeting, JC asked about the
potential for additional valve installations along the non-pot system. City discussed and agreed that for the
cost it would be beneficial to have additional valves on the system.
Reason for change:
The additionalgate valves were seen as a benefit to the system as they provide additional isolation points
on the system allowing for greater operational flexibility with the system as segments may need to be shut
down, at various times, for future tie-ins or needs.
Cost Negotiation Process:
JCC submitted CPR 96 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work and are comparable to
prices we have seen on similar work previously done on the project. The proposed cost was found to be
appropriate and was recommended for approval by BC. The CPR cost was approved.
FinalGost= $13,149.27Days= 0
Meridian City Council Meeting Agenda November 6, 2019 – Page 509 of 610
CPR #97A - Secondary Scum Pump Station Modifications
Description Summary;
Work includes the lowering of the Secondary Scum Pump Station Vault and adding an additional vault
riser section.
Why is Change Necessary:
This work is a Scope Change to the Contract. During the precast submittal review, it was identified that
the elevations provided would not allow for proper gravity flow of the scum from the Secondary Clarifiers
into the Scump Pump Station Vault. As a result, the vault was lowered to provide the necessary change in
elevation to allow scum to gravity flow. ln conjunction with this, grading adjustments were made, requiring
additional vault sections to be created to bring the vault to finished grade.
Reason for change:
Under Work Change Directive No. 5 JCC was instructed to modify the original grading between the
Aeration Basins and Blower Buildings, along the Mixed Liquor Collection Channel. Additional grading
adjustments were also made around the new Secondary Clarifiers to allow better drainage throughout the
area. lt was also noted during construction of the Scum Pump Station that the elevation of the 6-inch
scum line, as it leaves the Secondary Clarifiers was at a slightly higher elevation than that of which the line
entered the Scump Pump Station. ln order to maintain gravity flow capabilities, the Scum Pump Station
Vault was lowered. Due to the grading adjustments and the lowering of the vault, an additinoal riser
section was necessary to bring the top of the vault to finished grade elevation, preventing runoff from
entering and potentially flooding the vault.
Cost Negotiation Process:
JCC submitted CPR 97 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work. The proposed cost was
found to be appropriate and was recommended for approval by BC. The CPR cost was approved.
Final Cost=
-P-ey-s-=----------
$7,049.93
0
Meridian City Council Meeting Agenda November 6, 2019 – Page 510 of 610
CPR #99 - Non-Potable Waterline Crossing the MLCC
Description Summary:
Work includes the procurement and installation of 6-inch stainless steel piping across the Mixed Liquor
Collection Channel (MLCC) for the non-potable water, in two separate locations.
Why is Change Necessary:
This work is a Scope Change to the Contract. The design drawings did not specify a specific material for
the non-potable water line crossing of the MLCC, so based matching of the upstream piping material
(PVC in this application), the change to SSTL is considered a change to the scope. Had the material been
included originally in the project bid, the CoM would have paid for this cost increase during that timeframe.
Reason for change:
Due to the off gasing that could occur from the process water flowing through the MLCC, the durability of
utilizing PVC piping comes into question. JCC recommended the change to a SSTL materialto increase
the durability of the non-potable piping as it spans across the MLCC. Another factor that the CoM
considered was that due in part to the importance of the MLCC process flow, the ability to shut the
channel down to maintain the non-pot line, if PVC was utilized, would be extremly difficult and most likely
costly (bypass pumping and piping to transport water around the MLCC and into the Secondary Splitter
Box), which played an important role in deciding on the change in material.
Cost Negotiation Process:
JCC submitted CPR 99 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work. The proposed cost was
found to be appropriate and was recommended for approval by BC. The CPR cost was approved by the
CoM due to the increase in durability of the pipe material, as well as the difficuty in shutting down the
MLCC for maintenance purposes.
FinalCost= $8,647.11Days= 0
Meridian City Council Meeting Agenda November 6, 2019 – Page 511 of 610
CPR #100 - Waterline Sleeves
Description Summary:
Work includes the following segments of work: 1. Lowering of the existing 8-inch potable waterline where
it crosses the 3, 36-inch ML lines, utilizing four 4S-degree bends. 2. lnstalling the lowered 8-inch PW line
within a steel sleeve where it crosses the 3, 36-inch ML lines. 3. lnstallthe 8-inch PW line, where it
crosses the 48-inch SE pipe downstream of SC 7, within a steelsleeve.
Why is Change Necessary:
This work is considered to be Unforseen/Hidden Conditions. JCC has encountered the existing 8-inch PW
line on previous work and all stakeholders identified that the 8-inch line was going to be in conflict with
new proposed utilities. Due to the depth of the 8-inch PW line being deeper than what was identified
during project design, it has been in conflict throughout the project.
Reason for change:
As JCC has encountered the 8-inch PW line on previous conflicts that have been unforseen, CoM and
B&C evaluated the idea of lowering the three 36-inch ML lines and leave the 8-inch line at existing depth,
but this would create additional conflicts with the 36-inch RAS lines that were previously installed in the
Summer of 2018 (line running from the RAS Transfer Station to RASMAS Station 2), as well as fittings
for the 36-inch lines being substantially higher, in price, than 8-inch fittings. Due to this, it was determined
that the lowering of the 8-inch PW was the best option to avoid the conflicts with the new pipe. The steel
sleeves are required to be installed on any PW lines, per CoM Standards, when appropriate separation
between water class and non-water class pipe is less than 18-inches. (Standard Details SW1 and SW2
and Meridian Supplemental Spec Section 310)
Cost Negotiation Process:
JCC submitted CPR 100 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work. The proposed cost was
found to be appropriate and was recommended for approval by BC. The CPR cost was approved by the
CoM on the basis of the lowering of the 8-inch PW line being more economical to the lowering of the 36-
inch ML lines.
FinalGost= $28,485.05Davs= 0
Meridian City Council Meeting Agenda November 6, 2019 – Page 512 of 610
CPR #10{ - 144-inch Manhole Future Bulkhead Frame
Description Summary:
Work includes the procurement and installation of Stainless Steel angle bar within the newly constructed
144-inch Manhole.
Why is Change Necessary:
This work is a Scope Change to the Contract. This work was considered after project construction began
and is added work to the Contractor's Scope.
Reason for Change:
The 144-inch manhole, under the current plan, will receive secondary effluent flow from Secondary
Clarifier #6 and #7 and will flow east towards the Secondary Effluent Box, where it will converge with
Secondary Effluent flows from Secondary Clarifier #5. The '144-inch manhole also has a stub of 66-in
Secondary Effluent pipe that leads to the west, which will receive flows from Future Secondary Clarifiers.
This Change Request includes the installation of a Stainless Steel bulkhead which will allow tie-ins to this
existing 66-inch SE stub, in the future, without the need to shut down Secondary Clarifier #6 and #7 for the
tie-in.
Cost Negotiation Process:
JCC submitted CPR 101 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work and is comparable to work,
of similar nature, already conducted on the project. The proposed cost was found to be appropriate and
was recommended for approval by BC. The CPR cost was approved.
FinalCost=
Days=
$4,850.21
0
Meridian City Council Meeting Agenda November 6, 2019 – Page 513 of 610
CPR #102 - RAS/WAS 6-inch Air Connection
Description Summary:
Work includes the procurement of materials and connection to the existing air pipe stub out on the
northeast corner of the existing blower building with 6-inch stainless steel piping. This air pipe is the air
supply for the classifying selector of the new RASMAS Station 2.
Why is Change Necessary:
This work is a Scope Change to the Contract. This proposed change is a modification to the original
design, which had the Contractor tying into the main aeration pipe header feeding Aeration Basins (ABs) 1-
4. The modifications require additionalwork beyond the original Scope.
Reason for Change:
During design of the project, the RASMAS Station 2 Classifying Selector air supply was planned to tie
directly into the main air feed header for ABs 14 as this connection location would not interfere with the
replacement of the existing Blower Building under a future retrofit project for ABs 1-4. Discussions with
JCC, in regards to the duration of the tie-in, occurred during progress meetings, in which JCC identified an
approximate window of 4-8 hours. This time frame would have an impact on the operations of the plant,
as there would be a lack of air supply to ABs 1-4 for this time frame. BC looked into options for alternate
connection locations and determined a connection could be made on the NE corner of the existing Blower
Building at an isolation valve. This location would not have any impact on the air supply to ABs 1-4, thus
making it an ideal solution.
Cost Negotiation Process:
JCC submitted CPR 102to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work. The proposed cost was
found to be appropriate and was recommended for approval by BC. The CPR cost was approved.
FinalCost= $31,714.45
Days= 25
Meridian City Council Meeting Agenda November 6, 2019 – Page 514 of 610
CPR #103 - Unsuitable Material Removal
Description Summary:
Work includes the removal of saturated lean clay material and construction debris from the bottom of the
3-36-inch Mixed Liquor line trench excavation to competent native materials as directed by MTl.
Why is Change Necessary:
This work is an Unforseen/Hidden Condition. Excavation in this area had not previously been conducted
and the Contractor did not have any way of knowing or the ability to avoid these unsuitable materials due
to the necessary location of the ML lines.
Reason for Change:
The Contractor encountered the unsuitable materials and immediately notifed the City lnspector and PM
identifying the issue at hand and inquiring about the ability to reach out to MTI (City materials inspection
consultant) to get them onsite to inspect the materials and provide a solution to the issue. MTI provided
the City with a written report that indicated the materials were a saturated lean clay and were not suitable
for bedding and backfilling material. JCC brought in suitable native material from the site to utilize as the
backfill. Based on the specification requirements when dealing with unsuitable materials (1. Notify City ;2
Obtain recommendation for the dealing with unsuitable material ; 3. prepare price based on
recommendation; 4. implement fix) the CoM feels JCC followed the proper procedures for this change.
Cost Negotiation Process:
JCC submitted CPR 103 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work. The proposed cost was
found to be appropriate and was recommended for approval by BC. The CPR cost was approved.FinalCost= $5,0#.38Days= 0
Meridian City Council Meeting Agenda November 6, 2019 – Page 515 of 610
CPR #104 - RAS/WAS Slylight Upsizing
Description Summary:
Work includes the upsizing of the opening and skylights, located within the RAS pump room of the
RASM/AS Station 2, from a 4'x4'to a 5'x5' clear opening. The deletion of the east-west structural steel
(spanned between the roof girders) as there is not sufficient room when the opening is increased by 1'
square.
Why is Change Necessary:
This work is an Error/Omission. The base plate on the RAS pumps would not fit through the deisgned
4'x4' opening and as such, the openings needed to be resized to allow the pumps to be dropped into the
building. Brown and Caldwell will be reimbursing the City for the cost of the change.
Reason for Change:
The manufacturer data that was received, by B&C for the RAS pumps during design, indicated that a 4'x4'
opening would be sufficient for the skylights, which was subsequently shown on the drawings. During the
submittal phase, the larger RAS pump submittal included a 52"x52" pump base plate, which is larger than
the designed 4'x4'opening. Approximately 3 months after the RAS pump submittal was reviewed, JCC
submitted the skylights shop drawings based on the design drawings al4'x4'. Neither BC or JCC
recognized the size increase associated with the RAS Pump submittal, allowing JCC to order the 4'x4'
skylights and have them delievered to the site. The undersized opening was not realized until after the roof
framing for the RAS Pump room was complete. Re-work (cutting of easUwest girders and cutting 1'
square opening in skylight opening) associated with the roof framing modifications and ordering of new
skylights was necessary because the skylight manufacturer would not re-stock the original skylights. BC is
reimbursing the City for the cost of this change.
Cost Negotiation Process:
JCC submitted CPR '104 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work and is comparable to work,
of similar nature, already conducted on the project. The proposed cost was found to be appropriate and
was recommended for approval by BC. The CPR cost was approved by the CoM.
FinalCost= $15,752.139qys= o
Meridian City Council Meeting Agenda November 6, 2019 – Page 516 of 610
CPR #106 - Chemical Piping Reroute Around Retaining Wall
Description Summary:
Work includes the reroute of the chemical pipe from the chemical building to the south end of the retaining
wall (between new Aeration Basins and new blower and chemical feed buildings) then west to the aeration
basins.
Why is Change Necessary:
This work is a Scope Change to the Contract. This work was considered after project construction began
and is added work to the Contractor's Scope. The work associated with this CPR is a reroute to the
originally designed chemical piping in the area.
Reason for Change:
The lnitial design layout had the chemical piping leaving the chem feed building, heading straight west
towards the east wall of the Mixed Liquor Collection Channel and then running north along the east face.
The design intended for the routing to travel at a sufficient depth for cover, as well as providing enough
cover underneath the transformer bank, providing power to the blower building. JC had installed the
chemical lines per plan and after seeing the lines installed in the field, but prior to pressure testing, it made
more sense to change the routing due to the close proximity to the transformers. lf there was ever an
issue with the carrier or casing pipe (double contianment system) it would be extremly difficult to repair as
the lines were directly under the 3 transformers. ln discussing with JC, it made sense to reroute the piping,
which allowed for them to clear the area and allow Challenger to complete their conduit installation without
hindering the construction schedule significantly.
Cost Negotiation Process:
Discussions occured in the field between JCC and the City, identifying the most efficient and cost effective
solution. An estimated price was provided, by JCC, which was in line with what the expectations were for
the associated work, as well as what we have seen on the project previously. JCC submitted CPR 106 to
the City PM, City inspector, and B&C for their review and comment. Breakdowns of labor costs, as well as
material costs were provided. The proposed labor and material costs were reviewed and are considered
to be appropriate for this type of work. The CPR pricing came in under the intially discussed, estimated,
price. The proposed cost was found to be appropriate and was recommended for approval by BC. The
CPR cost was approved.
FinalGost= $4,509.26Days= 10
Meridian City Council Meeting Agenda November 6, 2019 – Page 517 of 610
CPR #107 - Knife Gate Valve Goating and SSTL Bearings
Description Summary:
Work includes the coating of the knife gate valve pedestal supports to meet the specification requirements
found in Section 9 90 00 - Painting and Coating. Work also includes the installation of SSTL bearings on
the top and bottom of the yoke to allow the stem on the top and the brass on the bottom to operate the
valve as necessary.
Why is Change Necessary:
This work is a Scope Change to the Contract. The manufacturer did not include the requested changes of
the CPR, in the intial CPR (CPR #59) that incorporated the knife gate valve stem extensions into the
project. The UV coating and SSTL bearings are required for the operation of the equipment as well as for
meeting the Contract Specification requirements.
Reason for Change:
The knife gate stem extensions were initially provided and paid for under CPR #59. The manufacturer
failed to include the appropriate coating as required per the Contract Specifications. ln order to have a
coating system that provided UV protection for the equipment found above the water surface, the stem
extensions were sent back to the manufacturer for them to recoat with the correct coating. JCC identifed
that this error was caused by the manufacturer and as such is only passing through a portion of the full
cost associated with the correct coating. The supplier and JCC are incurring the remaining costs. Had the
correct coating been applied to the initial CPR (CPR #59) the CoM would have paid for those costs at that
time. The required bearings, for complete operation of the equipment, were not initially provided within the
costs associated wuth CPR #59, but are necessary for operation. Had the bearings been included intially,
the CoM would have approved payment for the bearings under CPR #59. The costs the CoM has agreed
to, under this CPR, are for the SSTL bearing material.
Cost Negotiation Process:
JCC submitted CPR 107 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work. The proposed cost was
found to be appropriate and was recommended for approval by BC. The CPR cost was approved.
FinalCost= $14,352.96Days= 0
Meridian City Council Meeting Agenda November 6, 2019 – Page 518 of 610
CPR #108 - RAS/WAS Station 2 Existing Switchgear
Description Summary:
Work includes the Demo of the existing switchgear pad (south of Centrifuge Building), while protecting the
existing 480v wire and existing 12.47kv circuit and raceways feeding the existing transformer. Provide a
new pre-cast gear pad, remove existing terminating switchgear and installing the new transformer on new
gear pad. lnstallation of new underground power to provide adequate wire length from existing overhead
pole to new transformer. Set up of City owned spare Transformer and wiring to provide temporary power
service to Centrifuge building while Change Request work is completed (requires a two week shutdown
for new equipment switchover).
Why is Change Necessary:
This work is a Scope Change to the Contract. The existing switchgear pad was thicker (+24-inches) than
originally anticipated, requiring Challenger to identify alternative solutions on providing a termination point
for the new power from RASMAS 2 and the existing Centrifuge Building.
Reason for Change:
The existing switchgear and existing transformer were to be removed, under the Contract, and replaced
with a new transformer and terminating box to handle the new power feeds coming from the RASA//AS
Station 2, all while protecting and utilizing the power feeds from the existing overhead pole and the
Centrifuge Building. The original design plan called for Challenger to undermine the existing switchgear
pad and daylight the new power conduits and conductor through the pad and then set a new terminating
box. As the existing gear pad was thicker than anticipated, the ability to undermine and daylight the
conduit became extremly difficult. Alternative solutions were identified under RFI #412, however this
proposed change became the most cost effective and efficient alternative. Challenger was informed that
power needed to remain to the Centrifuge Building during the proposed change and subsequent electrical
cutover. By utilizing a CoM spare Transformer, Challenger was able to provide temporary power to the
Centrifuge Building without any impact to the daily operational needs.
Cost Negotiation Process:
JCC submitted CPR 108A to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work and is comparable to work,
of similar nature, already conducted on the project. The CoM discussed alternative options, but the
proposed was the most cost effective and efficient, allowing JCC and their Subs to continue towards
Commissioning. The proposed cost was found to be appropriate and was recommended for approval by
BC. The CPR cost was approved.FinalCost= $50,843.99
-P-?v-s-:----- ------l!-.
Meridian City Council Meeting Agenda November 6, 2019 – Page 519 of 610
CPR #109 - Davit Crane Handrail Opening
Description Summary:
Work includes the installation of chain within openings in the handrail at each of the eight mixer locations
located in the Mixed Liquor Distribution Channel (MLDC).
Why is Change Necessary:
This work is under the "Other" category as a change to the Contract. During the bidding process, the
Mixer manufacturer included the davit crane bases as part of their package. The crane bases were not
initially designed into the project as the mixers were intended to be pulled using CoM equipment. The
davit cranes will be a benefit as they will allow easier access to the mixers for Maintenance staff. As the
distribution channelwalls need to house overhead lights, electrical panels, and the handrail, the openings
for access to the cranes is crucial and in order to provide necessary safety requirements, the chains were
identified as a cost effective solution to allow easy access to the crane bases, as well as providing security
from an Operator or Mechanic from falling into the basins.
Reason for Change:
The Davit Cranes will be utilized to lift the mixers out of the MLDC and brought to the top of the grating to
allow for any maintenance repairs or replacement needs. Without the opening in the handrail, the davit
cranes would not be able to be set in their bases (which are bolted to the distribution channel walls) and
then would be unable to be operated to lift the mixers out of the channel. The CoM had safety concerns
with leaving the gap within the handrail opening. JCC proposed the installation of horizontalchains that
lock to the handrail, creating a safer work environment, while still allowing the full operation of the Davit
Cranes.
Cost Negotiation Process:
JCC submitted CPR 109 to the City PM, City inspector, and B&C for their review and comment.
Breakdowns of labor costs, as well as material costs were provided. The proposed labor and material
costs were reviewed and are considered to be appropriate for this type of work The proposed cost was
found to be appropriate and was recommended for approval by BC. The CPR cost was approved.FinalCost= $6,682.93Days= 0
Meridian City Council Meeting Agenda November 6, 2019 – Page 520 of 610
co #1
CPR #2
CPR #3
CPR #4
CPR #5
CPR #6
cPR #1 1
cPR #13
cPR #16
Cost
$2,787.01
$3,958.16
$0.00
$967.50
$3,1 02.90
-$58,290.00
-$7s0.00
$5,759.39
Days
Dewatering Pipe Damage-Flood
Chemical Building Roof Drain
Lighting Change
Vehicle Grounding
350 HP Aeration Blower Conduit
66" Dia. Pipe Material Credit
AFFF Concentrate Line Material
Screen to separate >3" cobble
Eliminate Sub-Slab Waterproofing or Vapor Barrier / Dampproofing Water Bearing Tanks
Discharge Elevation of Blower Building Drain Line
Cap and Bulkhead for 66" SE Pipe for Future Tertiary Project
Weather Delay
Total=-$42,46s.04
Cost
-$68,860.58
$0.00
$7,393.81
$0.00
Days
0
36
co#2
CPR #7
CPR #9
cPR#27
cPR #19
co #3
CPR #8
CPR #1OA
CPR #12A
cPR#24
cPR #28
Total= -$61,466.77 36
AMS
Fire Alarm Panel
Gas Detector
Galvanizing
Screening Additional Week
RASM/AS Duct Bank
Contaminated Soil
Value Engineering
Secondary Clarilier #7 Dewatering and SG Repair
Cost
$17,281 .30
$47,822.97
$9,706.79
$16,824.36
$2,879.1s
Days
7
10
3
co #4
CPR #29A
cPR #37
cPR #38
cPR #41C
Total=
CO Total Cost=
Total=
CO Total Cost=
Total=
CO Total Cost=
Total=
CO Total Cost=
$94,514.57 20
-$9,417.24
Cost
$55,384.97
$22,923.13
-$83,600.00
$28,777.65
Days
co #5
cPR #17
cPR #21
cPR#22
CPR#4.2
cPR #50
cPR #52
Primary Sludge Hatch Roof Curbs
Chemical Building Float Switches
BlowerVFDs
RAS Transfer Subgrade Repair
Drain Pump Guide Rail Assembly
Rotameter
Upgrade to Existing Non-Potable Water Lines
SC7 Subgrade Delay
Chemical Building Vapor Barrier
Secondary Clarifier 6 Subgrade Repair
RAS Transfer Station CMU Height
$23,485.75 0
$14,068.51
Cost
$3,s78.46
$889.25
$27,107.94
$7,577.84
$1 1 ,010.80
$7,542.74
Days
$57,707.03
$71,775.s4
Cost
$31,128.22
$12,726.31
$0.00
$13,446.38
$6,010.20
0
co #6
cPR #14
CPR #43E
cPR #45
cPR #56
cPR #57
Days
$63,311 .11
$135,086.65
0
Meridian City Council Meeting Agenda November 6, 2019 – Page 521 of 610
co#7
cPR #30
cPR #46
cPR #58
co #8
cPR #48
cPR #61
cPR #62
cPR #68
cPR #70
Cost
$57,432.35
$22,684.96
$420,000.00
Days
66-inch SE Modifications
DO Probe/Transmitter lnstalltion within Aeration Basins #6 and #8
Primary Power lmprovements
Chemical Building - Fire Sprinkler Coating
Chemical Metering Pumps VFD Panels
Secondary Splitter Box Coarse Bubble Diffuser
20-inch ML Pipe Materials
Stainless Steel Methanol Tank Overflow Modifications
Retaining Wall Changes
Convenience Outlets
Knife Gate Stem and Gear Box Extension
PSPS Electrical Elevation Modifications
Blower Building Electrical Elevation Modifications
RAS Transfer Electrical Elevation Modifi cations
Coarse Bubble Diffuser in AB 9-12 (Droplegs)
Electrical Support Racks
Secondary Clarifier Weir Wash Pumps
Blower Building - Electrical Room Double Door Modifications
RAS Transfer HDPE Manifold Modificaitons
RASMAS HDPE Manifold Modifications
AMS Location and Electrical Wire Length
WAS Floor Gate Pipe Modifications
TSS Probe Style Modifications
Blower Building - NW Drainage Modifications
Axial Pump VFD Credit
IMLR Pump Rail Support
Mixer Support
RASMAS Station 2 - Concrete Modifications
Additional Conduit to Blower and Chem Feed Buildings
36-inch RAS/Existing water Conflict near Blower Building
Multi Parameter Analyzer Analog Signals
ML Collection Channel Pipe Support
Conduit for AB 9-12
Relocate 8-inch PW East of 36-inch RAS
Relocate Existing PW at 66-inch Crossing (Sta 3+50 66-inch SE)
SSTL Stilling Well - Sec. Scum Pump Station
48-inch SE and 36-inch RAS Conflict
NPW Gate Valves
Secondary Scum PS Modifications
Non-Pot Waterline crossing ML Collection Channel
21
Total
CO Total Cost =
Total
Overall CO Total Cost =
Total
Overall CO Total Cost =
Total
Overall CO Total Cost =
$500,117.31 21
$635,203.96
Cost
$s,493.79
$27,433.36
$17.748.17
$s0,8s6.04
$4,040.97
Days
$10s,572.33
$740,776.29
0
Days
60
co #9
CPR #25B
cPR #54
CPR #59A
cPR #64
cPR #65
cPR #66
cPR #69
cPR #71
cPR#72
cPR #73
cPR #76
cPR #80
co #10
cPR #47
cPR #77
cPR #78
cPR #82
cPR #83
cPR #84
cPR #85
cPR #86
cPR #89
cPR #90
co #11
cPR #26
cPR #63
cPR #87
cPR #92
cPR #93
cPR #94
cPR #95
cPR #96
CPR #97
cPR #99
Gost
$99,955.50
$13,376.99
$66,s76.79
$7,494.27
$36,604.84
$13,809.89
$23,592.92
$15,398.09
$3,711.39
$4,201.77
$12,462.O4
$29,953.42
$327,137.g',i.60
$1,067,914.20
Cost
$22,383.40
$6,165.71
$4,342.21
$14,633.38
-$21,491.42
$7,067.68
$7,414.50
$17,597.40
$7,182.46
$23,350.94
Days
10
$88,646.26 10
$1,156,560.46
Cost
$6,685.98
$1 1 5,1 95.s2
$46,452.93
$45,763.61
$20,254.24
$4,213.08
$12,350.00
$13,149.27
$7,049.93
$8,647.11
Days
30
20
4
5
Meridian City Council Meeting Agenda November 6, 2019 – Page 522 of 610
cPR #100
cPR #101
cPR #102
cPR #'t03
cPR #104
cPR #106
cPR #107
cPR #108
cPR #109
Waterline Sleeves
144-inch Manhole Future Bulkhead Frame
RASM/AS 6-inch Air Connection
Unsuitable Material Removal
RASM/AS Skylight Upsizing
Chemical Piping Reroute Around Retaining Wall
Knife Gate Valve Coating and SSTL Bearings
RASMAS Existing Switchgear
Davit Crane Handrail Opening
$28,48s.05
$4,850.21
$31,714.45
$5,044.38
$15,752.13
$4,509.26
$14,352.96
$50,843.99
$6,682.93
25
10
't4
Total
Overall CO Total Cost =
$441,997.03
$1,598,557.49
108
Meridian City Council Meeting Agenda November 6, 2019 – Page 523 of 610