HomeMy WebLinkAbout JC Constructors, Inc WRRF Liquid Stream Capacity Change Order #8E ID
Public IDAHO
Works Department
Moyor Tommy de Weerd
Clty Ccrrndl llcrnbcrtr
Keith Bird
loe Borton
Luhe Cquener
Genesis Milom
Anne Little Roberts
Ty Folmer
TO Keith Watts
FROM:Dan Berthe, PE
Staff Engineer II
DATE:06n9n8
SUBJECT: WRRF LIQUID STREAM CAPACITY EXPANSION CHANGE ORDER #8
WITH JC CONSTRUCTORS INC. (JC) rOR A NOT TO EXCEED
AMOUNT OF $105,572.33.
I. DEPARTMENT CONTACT PERSONS
Dan Berthe, Staff Engineer II
Clint Dolsby, Assistant City Engineer
Warren Stewart, City Engineer
Dale Bolthouse, PW Director
II. DESCRIPTION
B.
489-0356
489-034t
489-0350
98s-1257
A.Background
Council approved the construction phase of the Liquid Stream Capacity
Expansion project in January of 2017. The project will allow the WRRF to meet
future capacity demands as the City continues to grow, as well as complete part of
the first phase of upgrades required to meet the new regulations set forth in our
NPDES permit.
Proposed Changes to Project
Construction of the Liquid Stream Capacity Expansion project is currently
underway. Additional funds are necessary to complete specified items. The
additional work includes the coating of the fire sprinkler lines that will be located
within the Chemical Building. Being that the fire sprinkler system is located
within an area where they will be exposed to the acetic acid vapors, in order to
help prolong the life of the material and reduce the maintenance costs in the
future, JCC was asked for pricing to coat the sprinkler system lines. This cost is
seen as an enhancement to the project.
Page I of3
(
Meridian City Council Meeting Agenda November 7, 2018 – Page 271 of 520
The second component in the proposed change order is work associated with the
layout, coordination and installation of seven variable frequency drives (VFDs)
for the chemical feed pumps. The project design was based on the metering of
pumps with integral speed controllers built into the pump units. The supplier
submitted metering pumps with VFD speed control to the pump units in a
separate, wall mounted panel enclosure. This separate panel was not rated for the
space classification requirements of the chemical building pump room, so
Watson-Marlow was required to resubmit with a pump that met the requirements.
Their revised submittal, which met the classification requirements, included a
$200,000 higher cost than the initial submittal. Numerous coordination efforts
were conducted by all parties involved (COM, B&C, JCC, Challenger) to better
identify an altemative that met design requirements, Operations requests/needs,
and financial constraints of the project. Ultimately, JCC, Challenger, and WETCO
(Challenger's panel builder/fabricator) arrived at a lower cost altemative which
inlcluded mounting the VFDs in a modified PLC cabinet. The bulk of the CPR is
for additional costs associated with the coordination and communication needed
to resolve the issues regarding the VFD's, ultimately taking almost a year to
complete.
The third part of this proposed change is the installation of a coarse bubble
diffuser within the secondary splitter box, as well as the installation of an
additional eight diffusers on each drop leg within the mixed liquor channel.
During the submittal process Sanitaire recommended eight additional diffusers
per drop leg. This enhancement will allow Operations to reduce the amount of
phosphorus, within the channel, via additional mixing.
The fourth component of this change order work is for a change in material for
the 20-inch internal mixed liquor return piping. The bid specifications allowed for
numerous material options for this segment of work . JCC initially submitted shop
drawings for the use of an epoxy lined and coated carbon steel pipe. City
Operations staff had concerns over this due to the need for recoating every 7-10
years. Due to building constraints, the only viable options were to utilize the
carbon steel or use a stainless steel material. After review of coating prices, it was
estimated that the cost to recoat the carbon steel would end up higher than paying
to change to the stainless steel pipe.
The final component of the proposed change work includes the lowering of the
overflow pipe within the stainless steel methanol tank.
III. IMPACT
A. Fiscal Impacts
The project is under the WRRF Capacity Upgrades enhancement. The enhancement
value is currently $44,479,699.00 for FY 15, 16, 17, 18, and 19. The enhancement
value for FYl8 is $20,400,000.
B. Project Costs:
Fiscal Year 2017
Construction Contract
Account Code / Codes
60-3590-961 s I
Costs
$10,750,000.00
Page 2 of 3Meridian City Council Meeting Agenda November 7, 2018 – Page 272 of 520
co #1
co #2
co #3
Fiscal Year 2018
Construction Contract
co #4
co #5
co #6
co #7
co #8
Fiscal Year 20T9
Construction Contract
C. Available Project Funding
Fiscal Year
FY]5
FY]6
FYI7
FYI8
FYI 9
60-3590-96151
60-3590-96151
60-3590-961 5 1
Total
60-3590-961 5 1
60-3590-961 s 1
60-3590-961 s I
60-3590-96 I 5 I
60-3s90-9615r
60-3590-961s1
Total
60-3s90-96 1 5 I $6,315,000.00
$6,315,000.00Total
Total Construction Contract Cost $36,305,776.29
-$42,465.04
-$61,466.77
s94,514.57
$10,740,582.76
$18,500,000.00
$23,485.75
$57,707.03
$63,31 1.1 1
$500,117.31
$ 105,572.33
$19,250,193.53
Account Code / Codes
60-3590-96 I 5 1
60-3s90-96 I 5 1
60-3590-96 1 5 1
60-3590-96151
60-3s90-96 1 5 1
Total Funding
$444,699.00
$2,900,000.00
$12,385,000.00
$20,400,000.00
$7,200,000.00
$43,329,699.00
D. Time Constraints
In order to meet the requirements listed within the current NDPES permit, the
Expansion Project must continue to move forward to meet the projected
completion date. A delay in may alter that projected schedule.
Departmental Approval
Page 3 of 3
Meridian City Council Meeting Agenda November 7, 2018 – Page 273 of 520
?){,,IAN CITY OF MERIDIAN
Purchasing Department
33 E BROADWAY AVE, STE 106
MERIDIAN, ID 83642
TEL: (208) 489-0417
FAX: (208) 887-4813
@
CITY OF MERIDIAN
Public Works Department
\'UULiEt, rEU T--_-
VENDOR JC Constructors
6t19t2018
IS BUDGET AMENDMENT REQUIRED?
No
CASE MANAGEMENT TICKET NO.
DATE OF
REQUEST
AVAILABLE BUDGET AMOUNT
$t .00
Purchase Requisition
PURCHASE ORDER NUMBER MUST APPEAR ON ALL INVOICES. PACKING
SLIPS CARTONS AND CORRESPONDENCE RELATED TO THIS ORDER
PROJECT MANAGER
Clint Dolsby/Dan Berthe
TERMS
NET
FREIGHTTERMS
PREPAID TIONDESTINA Dan Berthe
PROJECT NAME: WRRF-Liquid Stream Capacitv Expansion-Construction P roiect CO #8
WRRF-Liquid Stream Capacity Expansion-Construction Proiect 1 $ 105,572.33 60 3590 96151 10601.D $ 105,572.33
$
$
$
$
$
$
$
$
$
AUTHORIZED COUNCIL SIcNATURE (if rcquired)
NOTES: CouncilApprovalDate:
$1 572.33
PART NUMBER / DESCRIPTION / COMMITMENT NAME /
TASK ORDER / CONTRACT / PROJECT DESCR]PTION
DEPT EXPENSE OR PRoJECT/
CODE GL ACCOUNT # COMMITMENT #FUND
ACCOUNTING CODES
QTY UNIT UNIT PRICE TOTAL AMOUNT
Descri n of Purchase
IDAHO
ll
Meridian City Council Meeting Agenda November 7, 2018 – Page 274 of 520
IAN
CITY OF MERIDIAN
33 EAST BROADWAY
IUERIDIAN, tD 83642
CHANGE ORDER
CHANGE ORDER NO.8
PROJECT NO.10601.D
CHANGE ORDER DATE:6t19t2018
EFFECTIVE DATE:
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 City E Contractor
WHY IS THE CHANGE NECESSARY
Check all that apply
tr Unforeseen / Hidden Conditions E Scope Change
E Other - descibe belowf1 Error with the Plans and/or Specifications
Explanation:
This change order includes Change Proposal Requests (CPR) 48, 61 ,62,68, and 70. Please see attached 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.
E 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
D Emergency Work to correct unsafe conditions.
tr Other - describe below
ExplanatiOn: (attached additional pages if needed)
Page 1 of 2
lllAkt)
Meridian City Council Meeting Agenda November 7, 2018 – Page 275 of 520
CHANGE IN CONTRACT PRICE:
CHANGE IN CONTRACT TIMES:
Original Contract Price: $35,665,000.00
Original Contract Times: 896
days
Net changes from previous Change Orders
Net changes form previous Change Orders (calendar days)
No. 1 to No. 7
No. 1 to No. 7
Nota charge «der rgmtam here $635,203.96
Nola change artier nueben hm 77
days
Net Increase.(decrease} of this Change Owd'er:` .
Net Increase (decrease) of this Change Order:
..
�at.nara�)
,1;Q5572:33
.0.
days .
Total Change (Increase /decrease) to date:
Total Days (Increase /decrease) to date:
(calendardays)
$740,776.29
77
days
New Contract Price with all Approved Change Orders:
New Contract Times with all Approved Change Orders:
(calendar days)
$36,305,776.29
973
days
PROVED: (City Purchasing Manager)
ACCEPTED: (Contractor)
?P-tM �[� y�J -----
By. Kelth Watts
By.
Date:
Date:
RECOMMENDED: (City Prole Manager)
DATE APPROVED BY COUNCIL (If requked
By: C)ry � ,J
NO SIGNATURE REQUIRED
Date: Y�`�tJ�llg
DATE:
METHOD OF COST DETERMINATION ! COST ANALYSIS OR VERIFICATION:
Please see attached sheet
Purchasing
BudgetAvzd-W)le (Attach Report)
Budget Information: Budget FY Ati�ettdment
Date Submitted tD.Clerk for Agenda: Appmv4Date:
Purchase Order No. Date Issued:
Page 2 of 2
Change Proposal Requests (CPR) and Field Orderc
CPR #48 Chemical Building - Fire Sprinkler Coating
Description Summary:
Work includes coating the fire sprinkler system pipe located within the Chemical Building. The coating will
be Seaguard 6000. This coating is necessary to help prevent acetic acid vapors from oxidizing the pipe
during tank filling.
Reason for change:
JCC raised a concern about coating the fire sprinkler lines in the Chemical Feed Building in RFI #202.
Even though the acetic acid tank is fully vented to the atmosphere, external to the building, there is some
potential over time that corrosion could occur on the fire sprinkler lines. This coating will help prevent
against this.
Cost Negotiation Process:
JCC submitted CPR 48 to the City PM, City inspector, and B&C for their review and comment. Labor cost
breakdowns and estimates on the coating provided to the reviewers. The proposed cost was found to be
appropriate for the scope of work. The CPR was recommended by B&C and the costs were approved.
Final Costs $5,493.79Days= 0
CPR #61 Chemical Metering Pumps VFD Panels
Description Summary:
Work includes the layout, coordination and installation of seven VFD panels for the chemical metering
pumps. The VFD panel pricing was already included in the original project scope. This change covers the
costs associated with labor spent by JCC and their subcontractor, Challenger, in coordinating the change
in VFD classification and the assembly of the components in the field.
Reason for change:
The Watson-Marlow submittal for the chemical metering pumps differed from the design concept in that
these pumps included separate VFD's for speed control instead of these being integral to the pump
design. The VFD's are required to be located outside of the classified (Class I Div ll explosion proof
requirements) space in the pump room or in an intrinsically safe enclosure. After the submittal came in,
Brown & Caldwell researched other pump vendors, but were unable to find a style that met the flow
demand requirements. BC also asked for a price from Watson Marlow to add an intrinsically safe
enclosure to their scope and received a quote for more than $200,000 to include them. Following these
initial inquiries, BC had several meetings with JCC and Operations to come up with other options
including locating them on the building exterior and in the electrical room. Operations was not favorable
to the building exterior option and there were space constraint challenges in the electrical room.
Ultimately, Challenger and WETCO c€rme up with a solution to house the VFDs in their own panel, with
the VFD HIM modules mounted on the PLC panel door. This was accepted by operations. Watson-
Marlow is shipping this equipment loose and Challenger will assemble the components in the field per
their plan with WETCO's supplied PLC.
Cost Negotiation Process:
JCC submitted CPR 61 to the City PM, City inspector, and B&C for their review and comment. Backup
documentation was provided to the reviewers, that lays out the time and effort tied into coordinating the
change in planned panel layouUdesign. The proposed cost was found to be appropriate for the scope of
work and was recommened by BC. The CPR cost was approved.
Final Cost= $27,433.36Days= 0
Meridian City Council Meeting Agenda November 7, 2018 – Page 277 of 520
CPR #62 - Secondary Splitter Box Coarse Bubble Diffuser
Description Summary:
lnstallation of a coarse bubble diffuser within the secondary splitter box immediately upstream of the
baffle wall. Work also includes the installation of eight additional diffusers on each dropleg for a total of
24 additional diffusers.
Reason for change:
As part of the submittal, Sanitaire (diffuser and drop leg vendor) suggested adding an additional drop leg
and more diffusers heads in the mixed liquor collection and secondary splitter box structures. Brown &
Caldwell evaluated this from a process perspective and determined that it would be beneficial for channel
mixing and preventing phosphorus release in the mixed liquor.
Cost Negotiation Process:
JCC submitted CPR 62 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 costs was approved.
Final Cost= $17,748.17
Days= 0
CPR #68 - 2O-inch ML Pipe Materials
Description Summary:
Work includes the construction of the 2O-inch Mixed liquor pipe, located within the Aeration Basins, in a
304L stainless steel schedule 55 pipe in lieu of the originally planned HDPE pipe.
Reason for change:
The original design included HPDE internal mixed liquor return piping in the aeration basins, however
other pipe materials were listed as acceptable in the pipe specification. JCC bid an epoxy lined and
coated carbon steel pipe material. There were concerns raised by operations and maintenance staff of
having to re-coat this pipe (Brown & Caldwell estimated this would need to occur every 7-10 years). BC
suggested going back to HDPE, however HDPE pipe prices have been a continuous problem on this
project as they have increased dramatically since bid date and the pipe is difficult to get due to the
Houston hurricane last summer impacting the resin production across the country. Also, the original
design called for 20-inch DIPS HDPE (21.6-inch outer diameter), which would not fit in the 21-inch
diameter holes JCC constructed in the basin baffle walls. BC agreed to entertain other pipe material
options for these lines and looked at PVC (Cg0O/Schedule 4O/Schedule 80) and stainless steel.
Unfortunately, the internal diameter of the PVC pipe options did not meet the flow hydraulics needed for
these lines. Left with the coated carbon steel and stainless steel options, the preference was to go with
stainless steel. The thought is that one re-coating of this pipe would likely be more than the incremental
cost increase to change to stainless steel. JCC credited back the original bid price of the carbon steel
pipe.
Cost Negotiation Process:
JCC submitted CPR 68 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 costs was approved.
Final Cost= $50,855.04
Davs=0
Meridian City Council Meeting Agenda November 7, 2018 – Page 278 of 520
CPR #70 - Stainless Stee! Methano! Tank Overflow Modifications
Description Summary:
Work includes lowering the overflow pipe within the Stainless Steel Methanol tank as the overflow pipe
was in conflict with the floating roof.
Reason for change:
The methanol tank submittal had two original submittals - one for the tank and one for the internal
floating cover (separate vendors). The initial internal floating cover submittal was rejected as it was not
an acceptable material meeting the specification. The second submittal for the internal floating cover was
approved, however at this point the tank had already been fabricated. When the floating cover arrived at
the tank supplier for final fabrication, they realized the overflow pipe was in conflict with the floating
cover. JCC was concerned about moving the overflow, as it reduced the volume of the tank. Brown &
Caldwell evaluated the impact on tank filling requirements and determined the volume decrease was very
minimal even at ultimate build-out conditions. Operations staff was acceptable to the change in volume
as well.
Cost Negotiation Process:
JCC submitted CPR 70 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 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 costs was approved.
Final Cost= $4,040.97Days= 0
Meridian City Council Meeting Agenda November 7, 2018 – Page 279 of 520
co #{
CPR #2
CPR #3
CPR #4
CPR #5
CPR #6
cPR #1 1
cPR #13
cPR #16
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
$2,787.O1
$3,958.16
$0.00
$967.50
$3,1 02.90
-$58,290.00
-$750.00
$5,759.39
co#2
CPR #7
CPR #9
cPR#27
cPR #19
co #4
CPR #29A
cPR #37
cPR #38
CPR #41C
co #3
CPR #8
CPR #1OA
CPR #124
cPR #24
cPR #28
Total= -$42,465.04
-$68,860.58
$0.00
$7,393.81
$0.00
Total=
Total additional days=
Total=
CO Total Cost=
Total=
CO Total Cost=
Total=
CO Total Cost=
Total=
CO Total Cost=
-$61,466.77
36
Cost
$17,281 .30
$47,822.97
$9,706.79
$16,824.36
$2,879.1 5
Days
AMS
Fire Alarm Panel
Gas Detector
Galvanizing
Screening Additional Week
RASMAS Duct Bank
Contaminated Soil
Value Engineering
Secondary Clarifier #7 Dewatering and SG Repair
7
10
3
$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 Curlcs
Chemical Building Float Switches
Blower VFDs
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
$3,578.46
$889.25
$27,107.94
$7,577.84
$1 I ,010.80
$7,542.74
Days
$57,707.03
$71,77s.54
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
$63,311.1 1
$135,086.65
0
Meridian City Council Meeting Agenda November 7, 2018 – Page 280 of 520
co#7
cPR #30
cPR #46
cPR #58
co #8
cPR #48
cPR #61
cPR #62
cPR #68
cPR #70
Cost
$57,432.3s
$22,684.96
$420,000.00
Days
66-inch SE Modifications
DO Probeffransmitter 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
21
Total
CO Total Cost =
Total
CO Total Cost =
$500,117.3'l 21
$635,203.96
Cost
$5,493.79
$27,433.36
$17,748.17
$50,856.04
$4,040.97
Days
$r05,572.33
$740,776.29
0
Meridian City Council Meeting Agenda November 7, 2018 – Page 281 of 520