CITY OF SANTA MARIA
IMPLEMENTATION PROJECT 3
PHASE II WASTEWATER TREATMENT PLANT
MODIFICATION # 1
This Modification # 1 (“Mod1”) to the Work Order (as defined below), is entered into by City of Santa Maria , a California Municipal Corporation and charter city (“City”) and Pacific Gas and Electric Company (“PG&E”), and is effective on the last date of signature below (“Mod1 Effective Date”). The Work Order by and between City and PG&E executed on or about July 1, 2021 (“Work Order”) relates to the City of Santa M aria Implementation Project 3, Phase II - Wastewater Treatment Plant (“WWTP”). The Work Order is hereto attached as Exhibit 1 and incorporated herein by reference. City and PG&E are each herein referred to as “Party” and collectively the “Parties”.
This Mod1 amends the Work Order as follows:
1. SCOPE OF WORK
Section 1.1 – Scope of Work of the Work Oder is amended to reflect additional scope, as more fully described in the attached Exhibit 2-Mod1.
Accordingly, Exhibit 2 of the Work Order is hereby amended to include the attached Exhibit 2-Mod1, hereto attached and incorporated as part of Exhibit 2 of the Work Order.
Section 1.3 - Term of the Work Order is amended as follows:
This Work Order shall commence upon the Work Order Effective Date and shall continue until all of the Services (including the additional services described in Exhibit 2 -Mod1) are complete; unless sooner terminated or extended as permitted under the MSA (the “Work Order Term”). Contractor shall complete the Services as described in Exhibit 2 and Exhibit 2-Mod1.
2. CONTRACT VALUE
As a result of this Mod1, the Work Order value is increased by Two Hundred Sixty -Five Thousand One Hundred Twenty-Nine Dollars ($265,129), thereby increasing the total value of the Work Order from One Million Six Hundred Eighty Thousand Seven Hundred Forty-Three Dollars ($1,680,743) to One Million Nine Hundred Forty-Five Thousand Eight Hundred Seventy-Two Dollars ($1,945,872).
Accordingly, Section 6.1.1 - Payment of the Work Order is modified as follows:
6.1 City will pay PG&E for the Implementation Work as follows:
6.1.1 City shall pay PG&E a total amount of $1,945,872 (One Million Nine Hundred Forty-Five Thousand Eight Hundred Seventy -Two Dollars ) in return for the Implementation Work. PG&E will submit monthly invoices to City based upon an agreed upon percentage completion of each task line i tem in the Schedule of Values ("SOV"), attached hereto as Exhibit 4 and incorporated herein.
Exhibit 4-Mod1-Revised Schedule of Values is hereby attached to this Mod1 and replaces in its entirety Exhibit 4-Schedule of Values of the Work Order.
3. NOTIFICATIONS AND INTERFACE
Section 7 - Notifications and Interface is hereby amended as follows:
Parties shall contact and/or deliver written notices (email is allowed) to the business contacts below in the normal course of business, and in the event of any problems which may significantly affect the performance of this Work Order.
CITY REPRESENTATIVE PG&E REPRESENTATIVE
Name Shad Springer Name Nick Burke
Title Director of Utilities Title Manager, Energy Consulting Services
Address 2065 East Main Street Address 300 Lakeside Drive Santa Maria, CA 93454 Oakland, CA 94612
Telephone (805) 925-0951 ext. 7211 Telephone 415-973-5335 Email [email protected] Email [email protected]
4. ALL OTHER TERMS AND CONDITIONS OF THE WORK ORDER REMAIN THE SAME.
5. AUTHORITY
Each Party represents and warrants that the individual signing below, as well as any Modifications and approvals hereunder, has and shall have all requisite power and legal authority to bind the Party on whose behalf he/she is signing to that Party’s obligations hereunder.
SIGNATURE PAGE FOLLOWS
IN WITNESS THEREOF, the Parties agree to be bound by this Mod1 as of the Mod1 Effective Date. “PG&E” “City”
PACIFIC GAS AND ELECTRIC COMPANY
a California corporation
CITY OF SANTA MARIA
a political subdivision
of the State of California
By: By:
AARON AUGUST JASON STILWELL
VP, Utility and Partnerships Innovation City Manager
Date Signed: Date Signed:
ATTEST
By:
RHONDA M. WHITE, CMC
Chief Deputy City Clerk
APPROVED AS TO FORM
Risk Manager
City Attorney
APPROVED AS TO CONTENT
Director of Utilities
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EXHIBIT 1
CITY OF SANTA MARIA
WORK ORDER
IMPLEMENTATION 3 PHASE II WASTEWATER TREATMENT PLANT
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EXHIBIT 2-MOD1
SCOPE OF WORK
This Exhibit 2-Mod1 to the Work Order fully describes below the additional scope of work and associated costs thereto.
This Exhibit 2-Mod1 is incorporated into and forms part of the Exhibit 2 to Work Order.
Item 1 - Supplemental Engineering for Clarifier and Gravity Thickener Controls Standardization and Upgrade
The work in this Item 1 includes supplemental engineering work relating to ECM-03 of the Work Order.
The supplemental work includes field investigation and documentation of design, specification of the solution and provides a firm fixed price for the retrofit and standardization of the motor control systems for the WWTP’s five (5) existing clarifiers and two (2) existing gravity thickeners. The following table lists the included systems.
MCC ID SOW Item Equipment Description
MCC-B B15 Secondary Clarifier Drive No. 2
MCC-B B19 Secondary Clarifier Drive No. 1
MCC-B B22 Intermediate Clarifier Drive
MCC-B B25 Primary Clarifier Drive No.1
MCC-B B7 Primary Clarifier Drive No.2
MCC-D D1 Thickener Mech. Drive No. 1
MCC-D D18 Gravity Thickener Drive No. 2
Fees
PG&E’s price to provide the services described for this Item 1 is a fixed lump-sum amount of:
Item 1 ..................................................................................................................................... $22,525 Item 2 - Modification to ECM-03
As a result of Item 1 above, this Item 2 modifies ECM-03 of the Work Order to include the items below.
Item 2.1 – Install Standardized and Upgraded Controls for Clarifiers and Gravity Thickeners The work in this Item 2.1 is to implement standardized and upgraded controls for the WWTP’s five (5) existing clarifiers and two (2) existing gravity thickeners.
Overview
The WWTP has five (5) existing clarifiers and two (2) existing gravity thickeners (or sludge thickeners).
Each clarifier and thickener has a drive motor, torque control system (TCS), and hard -wired control and monitoring system including a combination starter in a MCC and a local control panel (LCP) at the motor/drive location. The original design drawings for the clarifier and thickener controls show the same,
or very similar design for all the clarifier and thickener controls. However, the installed systems are all different. In this project the control design for each system is standardized, with minor exceptions, so the control system in each MCC bucket and each LCP is the same. The work includes replacement of each LCP with a new LCP and integration of the LCP to the motor, TCS and MCC controls utilizing existing raceways and wiring (except where new raceways and wiring have been identified in the work descriptions).
The work will include the following.
1) Final engineering, material and equipment submittals, and construction documents. 2) Removal of the existing LCPs and demolition of existing systems as indicated in the detailed scope of work (Attachment A).
3) Furnish and install a new LCP for each clarifier and thickener (a total of seven (7)). Each LCP will be fabricated to a single, standard design. Integrate the new control panel with the existing drive motor and torque control system, and the new motor controls in the MCC (provided in the base scope of work for ECM-3).
4) Use of corrosion resistant materials.
a. Enclosures will be NEMA 4X, 316 stainless steel.
b. Rigid conduit and conduit fittings will be 316 stainless steel. c. Supports and hardware will be 316 stainless steel.
5) Furnish and install a stainless steel shield over each new LCP to discourage birds from perching on the LCPs and protect the LCPs from bird droppings.
6) Install new conduit and wire at the LCP and drive location as indicated in the detailed scope of work (Attachment A) including:
a. Conduit needed for segregation of intrinsically safe circuits from other power and control circuits.
b. Replacement of specific existing conduit found to have damage. c. Re-installation of conduit to Primary Clarifier No.1’s shear pin swit ch to connect the conduit directly to the switch housing. This will eliminate a path for clarifier gas and moisture to enter the conduit and migrate to connected devices such as the torque switch.
7) Startup and testing of each system including pre -installation shop testing, field checkout, functional testing in the live system, and documentation of the results. 8) As-built drawings for each clarifier and thickener control system.
Detailed Scope of Work
The detailed written scope of work and associated drawings is included in Attachment A titled “Local Control Panel Upgrade for Clarifiers and Thickeners (Extra Work for ECM-03)”. Attachment A is the primary work product from Item 1 and is attached to this Mod1.
Fees
PG&E’s price to provide the services described for this item is a fixed lump-sum amount of:
Item .2.1 ................................................................................................................................ $226,131 Item 2.2 - Credit for Four (4) MCC Buckets Not Requiring Replacement This Item 2.2 is a reduction in contract scope and a credit of cost to the City for four (4) MCC buckets that will not be replaced.
Forty-six (46) MCC buckets are identified for replacement as part of ECM-03 scope of work. However, it was determined from the detailed site investigation that four (4) of these buckets would not benefit from replacement with the upgrade to an electronic overload and communication interface to SCADA. As a result, the four (4) buckets shown in the following table will be removed from the ECM-03 scope of work and credit for their costs will be given to the City. The quantity of MCC buckets to be replaced under ECM 03 is reduced to forty-two (42) after this change.
Quantity of buckets to be replaced in each MCC after this change. 1) MCC-B
a) Twenty (20) new MCC buckets.
2) MCC-BB
a) Eight (8) new MCC buckets.
3) MCC-D
a) Fourteen (14) new MCC buckets.
MCC
ID Equipment Description
SOW
Item # Notes
MCC-B Secondary Pump Station Sump
Pump No. 2
[10/25/21: Pump was removed]
B14 10/25/21: Pump removed per WWTP. Need to
determine what to do with this bucket.
Bucket is LOTO
MCC-B Conveyer Belt B27 10/13/21: Only circuit breaker remains in this bucket. No work in this bucket.
MCC-D Digester House Air Compressor D2 10/13/21: Bucket is being used to provide power to a new air compressor. Only the CB is in use. All other
bucket devices are abandoned in place.
MCC-D Not Labeled and Locked Out D14 10/13/21: No load side conductors.
Fees
As a result of this reduction in services, the Work Order amount is reduced by the amount of:
Item 2.2 ................................................................................................................................ - $29,966 Item 2.3. Furnish and Install Power-over-Ethernet Splitters in Forty-Two (42) MCC Buckets This Item 2.3 results from a design change requested by the City to provide 24 Volt DC power to each new MCC bucket using a Power -over-Ethernet (PoE) splitter in each bucket instead of installing a centralized group of 24VDC power supplies and wiring from the power supplies to each bucket.
Item 2.3a - Remove Current Contract Scope of Work for 24 Volt DC Power (CREDIT) 1) MCC-B
a) MCC-B has an existing bucket with existing 24VDC power supplies. b) Install wiring for 24VDC power in MCC-B from the existing 24VDC power supplies to twenty-seven (27) buckets in MCC-B. Terminate the 24VDC wiring to the Ethernet module in each. 2) MCC-BB
a) Furnish and install an enclosure for three (3) 24VDC power supplies in the primary building electrical room near MCC-BB. Install the power supplies in the enclosure. b) The 24VDC power supplies will be furnished by the City. c) Install wiring for 120VAC from MCC-BB to the 24VDC power supplies. d) Install wiring for 24VDC power in MCC-BB from the 24VDC power supplies to eight (8) buckets in MCC-BB. Terminate the 24VDC wiring to the Ethernet module in each bucket. 3) MCC-D
a) Furnish and install an enclosure for five (5) 24VDC power supplies in the digester building electrical room adjacent to MCC-D. Install the power supplies in the enclosure. b) The 24VDC power supplies will be furnished by the City. c) Install wiring for 120VAC from MCC-D to the 24VDC power supplies. d) Install wiring for 24VDC power in MCC-D from the 24VDC power supplies to eighteen (18) buckets in MCC-D. Terminate the 24VDC wiring to the Ethernet module in each bucket.
Item 2.3b - New Work for PoE Splitters
1) Furnish forty-two (42) PoE splitters, one for each new MCC bucket installed in the SST project. The PoE splitters will be N-Tron, model 100-POE-SPL-24.
2) Furnish two (2) PoE splitters to be spares for the WWTP. The PoE splitters will be N-Tron, model 100- POE-SPL-24.
3) Furnish twenty-six (26) fuse terminal blocks with fuse and end cover for the 24VDC power supply to the Ethernet communication module (C441). Fuse terminal blocks will be Allen Bradley, part # 1492-H5 with blown fuse indicator LED. Note: The City provided this material for sixteen (16) of the buckets, hence the quantity does not match the quantity of buckets in the project. 4) Install a PoE splitter and fuse terminal block on the bucket manufacturer’s DIN rail in the bucket or install additional DIN rail if the manufacturer’s DIN rail does not have enough space. 5) Furnish and install wiring for 24VDC power from the PoE splitter to the Ethernet communication module (C441) in each bucket.
6) Furnish and install a shielded, 600 Volt rated Cat5e patch cable between the PoE splitter and Ethernet communication module (C441) in each bucket. Quantity of forty-two (42). 7) All installation will be performed prior to installation of the bucket into the MCC.
Fees
PG&E’s pricing for the new services described for this I tem 4 and the credit for the scope reduction are fixed lump-sum amounts of:
Item 2.3a, Credit for Original Scope of Work for 24VDC Power ........................................................ - $4,531 Item 2.3b, Price to Furnish and Install PoE Splitters .......................................................................... $28,939 Item 2.3 Total Price ................................................................................................................. $24,408 Item 2.4 – Install an Ethernet Cable to Seven (7) Existing MCC Buckets This Item 2.4 is a request from the City to install an Ethernet cable seven (7) existing buckets to enable integration into SCADA.
The work will apply to the following MCC buckets:
MCC-B
• Grit Chamber Sump Pump No. 1
• Grit Chamber Sump Pump No. 2
• Primary Pump Station Sump Pump No. 1
• Primary Pump Station Sump Pump No. 2
• Secondary Pump Station Sump Pump No. 1
MCC-D
• Plant Drainage Sump Pump No. 1
• Plant Drainage Sump Pump No. 2
The work includes:
Furnish and install a shielded, 600 Volt rated Cat5e patch cable from the City’s Ethernet switch in the MCC room to each bucket. The cable will be installed in the conduits already installed as part of the SST project.
Quantity of seven (7).
Fees
PG&E’s price to provide the services described for this Item 5 is a fixed lump-sum amount of:
Item 2.4 Price ............................................................................................................................ $4,223
Item 2.5 - Modify Seven (7) Existing MCC Buckets to be Consistent with the SST Project Buckets, and Install a PoE Splitter and Ethernet Cable for each
This Item 2.5 is a request from the City to modify seven (7) existing MCC buckets to make them consistent with th e buckets being provided under the W ork Order SOW which includes adding an overload trip indicating light, changing the lens on the run light from green to red, and installing wiring for 120V power status to the existing Ethernet communication module. Additionally, install a PoE splitter and wiring in each bucket to provide 24VDC power for the existing Ethernet communication module.
The work will apply to the following MCC buckets:
MCC-B
• Grit Chamber Sump Pump No. 1
• Grit Chamber Sump Pump No. 2
• Primary Pump Station Sump Pump No. 1
• Primary Pump Station Sump Pump No. 2
• Secondary Pump Station Sump Pump No. 1
MCC-D
• Plant Drainage Sump Pump No. 1
• Plant Drainage Sump Pump No. 2
The work includes:
1) Furnish seven (7) PoE splitters. The PoE splitters will be N-Tron, model 100-POE-SPL-24. 2) Furnish seven (7) fuse terminal blocks with fuse and end cover for the 24VDC power supply to the Ethernet communication module (C441). Fuse terminal blocks will be Allen Bradley, part # 1492 -H5 with blown fuse indicator LED.
3) Furnish seven (7) overload trip indicating lights with amber lens, LED lamp, push -to-test feature and label to match those in the SST project buckets. Eaton model 10250T221L. 4) Furnish seven (7) red indicating light lenses for the existing run lights. Lenses by Eaton. 5) Install new devices and wiring in each bucket.
a) Install a PoE splitter and fuse terminal block on the bucket manufacturer’s DIN rail in the bucket or install additional DIN rail if the manufacturer’s DIN rail does not have enough space. b) Install wiring for 24VDC power from the PoE splitter to the existing Ethernet communication module (C441) in each bucket.
c) Furnish and install a shielded, 600 Volt rated Cat5e patch cable between the PoE splitter and existing Ethernet communication module (C441) in each bucket. Quantity of seven (7). d) Install the new overload trip light on the bucket’s device panel and install wiring to 120V power and the overload relay in the bucket.
e) Remove the existing run light lens and install the new red lens. f) If needed to facilitate installation of the new devices and wiring, remove the bucket from the MCC. Reinstall removed buckets into the MCC.
6) This work will be performed when the Contractor is onsite for work in the base contract. A unique trip to the site for this work is not included.
Fees
PG&E’s price to provide the services described for this Item 6 is a fixed lump-sum amount of:
Item 2.5 Price .......................................................................................................................... $17,808
Construction Approach And Planning
The construction approach including communication, planning and safety remain unchanged from the executed Work Order for the ongoing WWTP work. Status updates and implementation planning for the work in this proposal will be integrated into the ongoing pro ject update meetings with the City for the WWTP.
Schedule For Clarifier And Thickener Control Upgrade (Item 2) The estimated duration to complete the work in cluded in Mod1 is 135 working days (approximately twenty-six (26) weeks) after receipt of the fully executed Mod1. The estimated project timeline for the Mod1 SOW is shown in the Gantt chart on the following page. The Mod1 SOW aligns delivery of the new clarifier and thickener control panels with delivery of the new MCC Buckets for these systems (Group -4) in late June 2023 as shown in the latest Project Schedule dated 10/11/2022 , which is attached to this Mod1 as Exhibit 3 - Revised Estimated Project Schedule. Exhibit 3 – Revised Estimated Project Schedule replaces and supersedes Exhibit 3 of the Work Order.
Gantt Chart – Clarifier And Thickener Controls Upgrade (Item 2)
General Assumptions and Clarifications
The following assumptions and clarifications apply to the scope and costs in this proposal and are in addition to those included in the Work Order.
• All demolished equipment will be removed from site and disposed of by the installing contractors.
Facility may retain any demolished equipment at its discretion. • The local control panel replacement work for a clarifier or thickener system will be performed at the same time as the MCC bucket replacement for that system. • Existing clarifier and thickener catwalks, platforms, structures and railings are in serviceable condition and suitable for mounting and support of the new equipment as proposed. • The City is responsible for completing the following prior to starting demolition work for the clarifier and thickener local control panel replacements:
o Installing and commissioning the new torque switches for Gravity Thickeners #1 and #2. o Determination and setting of the torque set-point for the Hi-Torque switch (WSH-1), the primary Hi-Hi Torque switch (WSHH- 1), and the back -up Hi-Hi Torque switch (WSHH- 2) for each system. Refer to schematic drawing E-109 in Attachment A. o Testing and adjustment of the torque switch for each system to validate proper operation of the Hi -Torque switch (WSH 1), the primary Hi -Hi Torque switch (WS HH-1), and the back-up Hi-Hi Torque switch (WSHH-2) for each system. Refer to schematic drawing E-109 in Attachment A.
• Each clarifier and thickener is allowed to be shut down for a maximum of forty -eight (48) continuous hours for execution of the local con trol panel demolition, installation and start -up work.
• The Contractor is responsible for preventing tools and hardware associated with the local control panel replacement from entering the clarifiers and thickeners. • The City is responsible for all SCADA re lated work including, but not limited to network configuration, programming, communication interface integration, and computer/HMI screens. • Permits and plan check are not required.
• The WWTP’s existing hazardous area classification drawings for the clarifiers and thickeners are valid.
o Drawing No. 10E01, Primary Clarifier – Power, Grounding and Lighting Plan, Record Drawing dated 03/02/10 (Wastewater Treatment Plant Expansion Phase II). o Drawing No. 10E07, Area Classifications, Record Drawing dated 03/ 02/10 (Wastewater Treatment Plant Expansion Phase II).
o Drawing No. E -6, Gravity Thickener Plan & Existing Headworks Demo Plan, As -Built Drawing dated 12/98.
Exclusions
The following items are excluded from PG&E’s scope of work and are in addition to those included in the Work Order:
• The Contractor is not responsible for proper operation of the torque switches and shear pin switches, nor any setting, set-point, adjustment, calibration or testing related to those devices. • The Contractor is not resp onsible for modification or replacement of existing conduit, raceways or wiring not identified in the SOW.
• Contractor will not be responsible for “unknown” site conditions. Any issues and related costs resulting from discovery of conditions not readily identifiable by visual site inspection of existing conditions without any special, extraordinary or destructive testing will be addressed upon discovery.
• Overtime labor and associated costs not identified in the proposal. • Painting of conduits.
• Upgrades to existing systems for code compliance.
• Hazardous material identification, testing or analysis. • Temporary controls or power.
• Permit fees and plan check costs.
• Any costs associated to testing, special PPE, schedule issues (including, but not limited to, delays, access issues, or allowed work hours/off- hours work), overtime hours or altered working conditions that arise (either directly or indirectly) as a result of the COVID-19 pandemic will entitle contractor to an equitable adjustment for time for performance and costs.
Attachment A to Exhibit 2
(Detailed Scope of Work) Local Control Panel Upgrade for Clarifiers and Thickeners (Extra Work for ECM-3), Rev. 2, 01/20/2023
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EXHIBIT 3-MOD1
REVISED ESTIMATED PROJECT SCHEDULE
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EXHIBIT 4-MOD1
REVISED SCHEDULE OF VALUES
ECM $ 0
ECM-02 Remove / Consolidate Old WWTP Telemetry $ 664,153 ECM-03 Upgrade Motor Control Center (MCCs) $ 1,016,590 • Credit for (4) MCC Buckets Not Requiring Replacement $ (29,966) • Credit for 24 Volt DC Power $ (4,531)
• Furnish and Install Power-over-Ethernet Splitters in (42) MCC Buckets $ 28,939 • Install Ethernet Cable to (7) Existing MCC Buckets $ 4,223 • Modify Seven (7) Existing MCC Buckets and Install a PoE Splitter for each $ 17,808 Standardized and Upgraded Controls for Clarifiers and Gravity Thickeners $ 226,131 • Supplemental Engineering for Clarifier and Gravity Thickener Controls Standardization and Upgrade
$ 22,525
Original Contract Amount $ 1,680,743
Change Order Amount $ 265,129
Revised Contract Amount $ 1,945,872