Manteca City Council
October 4, 2022

RFP: WQCF CAPACITY IMPROVEMENTS

City of Manteca
WQCF Improvements Project
Request for Proposals
Issued: August 18, 2022
Electronic Proposals are Due: September 6, 2022 at 5:00 PM PST ATTACHMENT 2
RFP: WQCF CAPACITY IMPROVEMENTS

Contents
1  Introduction .......................................................................................................................................... 4

1.1  Time is of the Essence ................................................................................................................... 4 2  Background ........................................................................................................................................... 5 3  Proposal Submission and Format ......................................................................................................... 7

3.1  Inquiries and Addenda .................................................................................................................. 7

3.2  Work Proposal ............................................................................................................................... 8

3.3  Organization Credentials, Background ......................................................................................... 8

3.4  Experience ..................................................................................................................................... 8

3.5  Project Team ................................................................................................................................. 9

3.5.1  Lead Firm ............................................................................................................................... 9

3.5.2  Project Manager .................................................................................................................... 9

3.5.3  Project Team ......................................................................................................................... 9

3.6  Project Understanding and Approach......................................................................................... 10

3.7  Schedule of Work ........................................................................................................................ 10

3.8  Exceptions to Professional Services Agreement ......................................................................... 10 4  Scope of Services ................................................................................................................................ 10

4.1  Task 1 – Project Management .................................................................................................... 10

4.2  Task 2 – Construction Documents .............................................................................................. 11

4.3  Final Project Report to the California Energy Commission ......................................................... 11

4.3.1  Background ......................................................................................................................... 11

4.3.2  Project Description .............................................................................................................. 11

4.4  WQCF Capacity Studies Technical Memorandum (TM) .............................................................. 12

4.5  Replace Internal Mixed Liquor Recycle (IMLR) Pumps ............................................................... 12

4.5.1  Background ......................................................................................................................... 12

4.5.2  Project Description .............................................................................................................. 12

4.6  Fix Flow Split to The North Plant Aeration Basins ....................................................................... 13

4.6.1  Background ......................................................................................................................... 13

4.6.2  Project Description .............................................................................................................. 14

4.7  Add New Independent Mixing System to Zone B ....................................................................... 14

4.8  Add Process Aeration Control to Improve Monitoring and Control of Denitrification ............... 14

4.8.1  Background ......................................................................................................................... 14

4.8.2  Project Description .............................................................................................................. 14 ATTACHMENT 2
RFP: WQCF CAPACITY IMPROVEMENTS

4.9 Assist City Staff in Construction Bidding and Contractor Selection ............................................. 14

4.10 Assistance and Coordination During Construction ...................................................................... 15

4.11  Operations & Maintenance Manuals .......................................................................................... 15

4.12  Document Submittals ................................................................................................................. 15

4.13  Deliverables ................................................................................................................................. 16

4.13.1  Draft copies ......................................................................................................................... 16

4.13.2  Final document ................................................................................................................... 16

4.13.3  Project Schedule ................................................................................................................. 16 5  Cost Proposal ...................................................................................................................................... 16 6  Proposal Evaluation ............................................................................................................................ 16 7  Acceptance or Rejection of Proposal .................................................................................................. 17 8  Agreement for Professional Services .................................................................................................. 17 9  Insurance Requirements ..................................................................................................................... 17 List of Tables
Table 1  RFP Deadlines
Table 2  Links to Reference Documents and City Resources Table 3  RFP Contact Information
List of Appendices
Appendix A  California Energy Commission Report Template Appendix B  Project Cost Estimates
Appendix C  Professional Services Agreement
Appendix D  Insurance Requirements for Professional Services Appendix E  Sample O&M Chapter 7
Appendix F  Naming Standards and Asset Hierarchy
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RFP: WQCF CAPACITY IMPROVEMENTS

1 Introduction
Notice is hereby given that the City of Manteca (City) is inviting ELECTRONIC REQUEST FOR PROPOSALS (RFPs)  from  professional  consulting  firms  to  prepare  the Wastewater  Quality  Control  Facility  (WQCF) Capacity Improvements Project (Project). Table 1 lists RFP deadlines.

The  City  is  requesting  proposals  from  qualified  consultants  to  provide  professional  services  for  the following:

1. Final Project Report to the California Energy Commission a. Report template is provided in Appendix A

2. WQCF Capacity Improvements Technical Memorandum (TM) Design and Construction Services:

Cost estimates for the projects listed below are included in Appendix B.

3. Replace Internal Mixed Liquor Recycle (IMLR) Pumps

4. Fix Flow Split to the North Plant Aeration Basins

5. Add New Independent Mixing System to Zone B

6. Add Process Aeration Control to Improve Monitoring and Control of Denitrification Firms  submitting  proposals  for  this  project  must  have  a  project  manager  licensed  as  a  Professional Engineer in the State of California and have experience in the field of wastewater treatment, operation, and maintenance of municipal wastewater systems. Innovation is encouraged  to provide  the City with comprehensive services in the most efficient, cost effective manner.

1.1 Time is of the Essence
Time is of the essence with respect to this contract. Please refer to Table 1 for deadlines. The successful proposer should be able to perform all required tasks set forth in the Scope of Services section.

Table 1: RFP Deadlines
Milestone  Deadline
RFP Issued  08/18/2022
Deadline for Clarifications/Inquiries  08/31/2022, 5:00 pm PST Deadline for Proposal Submittal  09/06/2022, 5:00 pm PST Interviews (tentative)  09/14/2022
Award of Contract (tentative)  10/04/2022
Notice to Proceed (tentative)  10/05/2022
PST: Pacific Standard Time
Proposals  received after  the  deadline  time and  date listed in Table  1 will  not  be  considered. The  City accepts  no  responsibility if  delivery is made  to another electronic mail address  or  other  technological issues that cause a submittal to be late or not received by the deadline. An evaluation team will review submitted proposals and select the best proposal based on the evaluation criteria outlined in the RFP. The selected  consultant  will  then  be  recommended  to  the  City  Council  for  entering  into  a  contractual ATTACHMENT 2
RFP: WQCF CAPACITY IMPROVEMENTS

agreement for services. A free electronic copy of the RFP can be obtained by going to the City’s website via the link below.

Link to this RFP: https://www.ci.manteca.ca.us/Pages/RequestForProposal.aspx 2 Background
The City provides sewer collection service to residents and businesses within the City limits and provides treatment at the City’s Wastewater Quality Control Facility (WQCF). The City is located approximately 15 miles north of Modesto and 10 miles south of Stockton. The Union Pacific Railroad runs diagonally from southeast  to  northwest  through  the  City.    Highway  120  crosses  the  southern  portion  of  the  City  and provides access to Interstate 5, located about four miles to the west of the City, and Highway 99 along the eastern boundary of the City.

The City’s current sewer service area coincides with the current City boundary.  In 2020 the estimated population of the City was 84,400, according to population data published by the California Department of Finance (DOF).

The WQCF is located southwest of downtown Manteca on 22‐acres owned by the City. The WQCF treats municipal wastewater collected from the City of Manteca and the City of Lathrop, and seasonally accepts industrial food processing waste effluent from Eckert Cold Storage. Per contractual agreement, 8.42 mgd of plant capacity is allocated to the City of Manteca and 1.45 mgd is allocated to the City of Lathrop.

The City’s current National Pollution Discharge Elimination System (NPDES) Permit, which regulates the wastewater effluent quantity and quality, was issued by the Central Valley Regional Water Quality Control Board and is Order R5‐2021‐0003 NPDES No. CA0081558.

The WQCF treats an average dry weather flow (ADWF) of about 7.6 mgd and has an average dry weather flow (ADWF) capacity of 9.87 mgd. However, historic water use reductions in the community combined with population growth have increased the biological oxygen demand (BOD) and total Kjeldahl nitrogen (TKN)  concentration  in  the  influent  wastewater.  The  higher  strength  wastewater,  results  in  increased biochemical oxygen demand (BOD) and nitrogen loading on the plant.

The  City’s  sewer  service  area  is  divided  into  north,  south  and  central  sewer  sheds.  The  municipal wastewater collection system includes 242 miles of sewer mains and 19 pump stations. The collection system includes gravity flow pipes ranging from 6‐inch to 60‐inch diameter, and force mains from 6‐inch to 54‐inch diameter.

The  existing  collection  system  generally  serves  the  developed  portions  of  the  City,  with  major  trunk sewers located in the core of the City (the central sewer shed), approximately bounded by State Route 120 to the south, Austin Road to the east, Lathrop Road to the north, and Airport Way to the west.

Additional  information  about  the  WQCF,  including  the  NPDES  Permit  are  listed  below,  and  in  the appendices of this RFP. Please use the corresponding links to obtain copies of each document.

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RFP: WQCF CAPACITY IMPROVEMENTS

The Manteca WQCF began operation in 1959 with treatment consisting of a sole oxidation pond. Pond effluent was discharged to the surrounding land. In 1970, the first major upgrade to the plant occurred.

This upgrade included the construction of preliminary and primary treatment facilities and aerobic sludge digestion.  Effluent  continued  to  be  discharged  to  the  land  for  agricultural  applications.  Process  flow diagrams are included in the appendices of this RFP.

At  present,  the  WQCF  consists  of  the  North  Side  Facilities  (NSF)  and  South  Side  Facilities  (SSF).  The following provides additional detail of each phase.
‐ Phase I Expansion 1986‐1988: as part of the Clean Water Grant Program, a major expansion to the plant was constructed. This Phase I Expansion Project included the construction of secondary treatment facilities, anaerobic sludge digesters, sludge drying beds, a chlorine disinfection system, and an outfall to the San Joaquin River. Design capacity (average) of the plant following the Phase I project was 5.45 mgd.
‐ The Phase II Expansion 1992‐1993: added a primary sedimentation basin, secondary clarifier, and four sludge drying beds, increasing the average plant capacity to 6.95 mgd.

The majority of the northside facilities was constructed during the Phase I and II expansion projects at the plant and consists of two aerated grit tanks, three primary sedimentation basins, a biotower feed pump station,  two  biotowers,  five  ultra‐fine  bubble  activated  sludge  aeration  basins,  and  three  secondary clarifiers.
‐ Phase III Expansion Project 2002‐2008: construction of southside  facilities, which included  the following:

1. Increasing average treatment capacity from 6.95 mgd to 9.87 mgd.

2. Influent  pump  station  and  fine  screening  facilities  to  accommodate  future  collection system infrastructure plans and projected build‐out flows for the service area.

3. Septage receiving station

4. Odor control
Support facilities (laboratory, locker room building, shop/maintenance building)

5. Wastewater fine screening
Table 2: Links to Reference Documents and City Resources Document / Resource  Link
0 ‐ RFP (this document & appendices)
1 ‐ NPDES Permit  https://www.ci.manteca.ca.us/Pages/RequestForProposal.aspx 2 ‐ WQCF Phase III Expansion
GIS Online Access  https://data‐
manteca.opendata.arcgis.com/datasets/3478489d53204631b7909d7d1e65c504_9 General Plan Update  https://manteca.generalplan.org/
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RFP: WQCF CAPACITY IMPROVEMENTS

6. Influent pumping (screw centrifugal pumps)

7. Aerated grit removal

8. Primary sedimentation
BOD reduction, nitrification, and denitrification in aeration basins

9. Secondary clarification

10. Secondary effluent equalization/storage

11. Chemical addition, rapid mixing, and flocculation

12. Filtration with cloth‐disk filters (CDFs)

13. Wastewater disinfection with UV light

14. Effluent pumping

15. Wastewater disposal by land application

16. Sludge pumping (primary and waste activated)

17. Sludge thickening through dissolved air flotation

18. Anaerobic digestion of thickened sludge

19. Digested sludge dewatering with high‐solids centrifuges

20. Recycled water pumping and storage
3 Proposal Submission and Format
Proposers must submit a Work Proposal and Cost Proposal via email  (refer to Table 3).   All responses must be completed as required, signed by an officer of the firm who is authorized to enter into a binding agreement with the City on behalf of the company (proof of signature authority must be attached), and must be received in the place and time designated in Table 1.

Table 3: RFP Contact Information
Submit  questions,  RFIs,  and  proposal  packages  to  the  contact  information  below.  Questions  and answers will be posted to the City’s RFP website.

Contact: Kyzen Nicolas, Assistant Engineer
Email: [email protected]
Subject Line: WQCF Capacity Improvements RFP
Notes:

1. Submittals or inquiries sent to other emails will not be accepted.

2. Deadline  to  ask  questions:  refer  to  Table  1  of  this  RFP  for  applicable  deadlines.  Questions and/or inquiries via phone and to other city personnel will not be answered.

3. Questions and answers will be posted to the City’s RFP website.

Proposals shall be concise, well‐organized and demonstrate the consultant’s qualifications and experience relating to the proposed project. At minimum, proposals shall include the information in the  following sections.

3.1 Inquiries and Addenda
All inquiries and questions shall be submitted in writing via email. Refer to city contact identified in Section 3 of this RFP. Inquiries received after the due date to ask questions will be disregarded.  Please include ATTACHMENT 2
RFP: WQCF CAPACITY IMPROVEMENTS

the following in the subject line of the email: “WQCF Capacity Improvements RFP.” Telephonic inquiries will not be taken. Questions and answers will be posted on the City’s website.

The City will
issue any revisions to this RFP as addenda.  The City will post questions, answers and addenda on the City’s website.   Proposers are  responsible  for  receipt  of all addenda.  The  City’s issuance  of a written addendum  is  the  only  official  method  whereby  the  City  will  interpret,  clarify,  or  provide  additional information concerning this RFP.  No oral revision to any provision in the RFP shall be binding.

3.2 Work Proposal
All proposals shall have a 15‐page (one‐sided page) limit. The proposal, resumes, and project schedule shall all be included within the 15‐page limit. The cover letter shall consist of maximum two (2) pages and include the following:
a. The proposer’s legal name, address,  telephone number, email address, and contact person  for the remainder of the selection process;
b. Any qualifying statements or comments  regarding  the proposer’s submittal, including proof of proposer’s capabilities  to prepare design drawings, design specifications, and  technical reports related to pumping and wastewater treatment processes;
c. Statement  indicating  the  validity  of  the  proposal  for  a  minimum  period  of  120  calendar  days subsequent to the proposal due date; and
d. Resumes provided for each staff member shall be one page long at most. Resumes shall indicate college education, degrees earned, year licensing was obtained, and relevant project experience.

3.3 Organization Credentials, Background
a. Number  of  years  in  business  working  in  wastewater  industry  preparing  retrofits  to  activated sludge processes;
b. Type of organization (partnership, corporation, etc.); c. Location of the office that will support your project team and perform the work. The individuals identified in the proposal shall be the same individuals that must complete the project work and meet/communicate with City staff on an on‐going, consistent, and regular basis. The City shall be notified in writing of any change in staff members at minimum 30‐days in advance. Changes is staff will need to be approved in writing by the City. This applies to all staff including staff from other firms; and
d. Count and description of personnel resources within the  firm, including, but not limited to, in‐ house professional disciplines of the firm.

3.4 Experience
Relevant  experience  with  the  preparation  of  wastewater  treatment  systems  including  retrofits  to activated  sludge  processes,  pump  design  and  sizing,  pipeline  systems,  hydraulic  design,  and  technical writing.

A minimum of three (3) references of existing and past water agency clients with emphasis given to work completed within the last five years. Please provide the following:
a. Project name/location
b. Project Manager name
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c. Completion date or current status
d. Client name and client representative with telephone number and e‐mail address e. Description of project
f. Original project budget and final cost
g. Original project duration and final project duration h. If project team includes a prime consultant and sub‐consultants, provide detail regarding the role of the consultant and sub‐consultants.

3.5 Project Team

3.5.1 Lead Firm
Clearly identify the lead firm noting the following items:

A. The lead firm shall oversee the project, be responsible for the successful completion of the work, and coordinate the work of all its sub‐consultants.

B. The lead firm must provide information that demonstrates its experience as a prime or major sub‐ consultant on projects of similar type, size, and complexity as the project under consideration.

C. The  Lead  Firm  shall  possess  all  permits,  licenses,  and  professional  credentials  necessary  to perform services as specified under this RFP.

3.5.2 Project Manager
Identify  the Project Manager, which will be  the primary client contact,  that will be responsible  for  the management of the project (through the duration of the entire project), and for ensuring that the project performs  within  the  agreed‐upon  scope,  schedule,  and  budget.  Information  regarding  the  Project Manager’s qualifications and experience (both technical and managerial) shall be provided as indicated below.

A. Project Manager shall conduct presentation during interview by City staff.

B. The  Project  Manager  must  have  demonstrated  strong  project  management  and  organization skills, contract management abilities, and effective communication and interpersonal skills.

C. The Project Manager must meet the minimum qualifications, as follows:
i. An employee of the lead firm; and
ii. A minimum of 10 years of relevant experience with the preparation of similar projects.

3.5.3 Project Team
Only personnel that will work on the project (through the duration of the project) shall be identified in the proposal. Changes to the project team shall be approved by the City. a. The project  team may consist of staff  from  the lead  firm and  from other consulting  firms with expertise in specific areas (sub‐consultants).
b. The  proposal  should  clearly  identify  key  personnel  and  Subject Matter  Experts  with  workload information and commitments of availability to work on the project to ensure that all prescribed deadlines are met.
c. List of proposed team members with titles that are expected to be involved throughout the life of the project, including prime consultants and sub‐consultants; d. Provide an organization chart of the proposed project staffing; and ATTACHMENT 2
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e. Provide resumes (one‐page maximum per team member) and related experience of each member that will be involved.  Emphasis should be given to work completed for comparable municipalities within the last three years.

3.6 Project Understanding and Approach
This section should demonstrate the proposer’s understanding of the Project and the services required under this RFP, how the work will be organized, and anticipated key issues to be addressed. This section should include:
a. Description  of  the  proposer’s  overall  approach  to  the  services  required  under  the  Scope  of Services,  such as an  outline  of a work  plan  that  describes  how the  proposer will  organize  the services;
b. Description of those areas that the proposer is most likely to have challenges, and discuss means to resolve those conflicts or avoid them altogether;
c. Identify what the proposer feels are the key components to making the project successful; and d. Other information that will assist City in selecting the most qualified consultant.

3.7 Schedule of Work
The  proposal  shall  include  a  schedule  of  work  items  on  a  task‐by‐task  basis,  including  an  estimated completion date for each task.

3.8 Exceptions to Professional Services Agreement
Exceptions shall be submitted in writing with justification clearly stated. Any consultant with exceptions to terms contained in the City’s Agreement for Professional Services (see Appendix C) must advise the City of such and requested modifications as part of its proposal. Failure of a proposer to accept the terms of the City’s Agreement for Professional Services may result in the rejection of the proposal. It shall be the responsibility  of  the  prospective  consultants  to  review  all  sections  and  exhibits  of  the  Agreement  for Professional Services, including insurance requirements included as Appendix D.

If no exceptions are noted, the City will assume the proposer is able to and will enter into the Agreement for Professional Services and  fulfill  the  terms and  requirements  set  therein. The City may  recover any damages accruing to the City as a result of the successful consultant’s failure or refusal to execute the City’s Agreement for Professional Services.
4 Scope of Services
The Scope of Services is comprised of the tasks detailed in the following sections.

4.1 Task 1 – Project Management
The consultant shall attend a project kick‐off conference call with the use of screen sharing capability with City staff to discuss project parameters, scheduling constraints, and other relevant information regarding services  required  by  this  RFP  to  prepare  the  Project,  and  additional  documents  as  outlined  below.

Consultant shall maintain a project schedule, which shall be updated, and submitted to the City at least ATTACHMENT 2
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once per month. Project update meetings shall take place once per month at minimum or more frequently as required by project needs.

If in‐person meetings or gatherings are needed, considerations for enhancing protection of individuals and preventing spread of coronavirus disease 2019 (COVID‐19) will need to be implemented. City staff and consultant will coordinate and determine, whether and how to implement these considerations,  and make the necessary adjustments to meet the needs and circumstances of the local community. ZOOM or similar remote meeting applications may be used if remote meetings are needed. City staff and consultant will coordinate the best use of remote meeting applications to encourage public participation. In‐person meetings will be held as needed for the project.

The  consultant  shall  prepare a  detailed  schedule  of  the  project and identify  completion  dates  for key milestones. The consultant is responsible for reviewing and becoming familiar with all pertinent data and requirements for completion of the project.

4.2 Task 2 – Construction Documents
The selected firm will develop two sets of detailed design drawings and construction specifications for this project.

Construction  documents  shall  incorporate  City  Engineering  Standards  and  General  Conditions  as appropriate. Plans and specifications shall be submitted to the City for review at the 75%, and 100% design stages.  The  75%,  and  100%  submittals  shall  drawings,  specifications,  supporting  documents,  and engineer's cost estimate for review. A technical review meeting shall be held after the 75% submittals to discuss the City's comments. One reproducible set and PDF fi sets of drawings and specifications along with the final engineer's cost estimate shall be provided as the Final submittal. Specifications shall also be provided electronically in both PDF and Microsoft Word (Word 2010) formats.

4.3 Final Project Report to the California Energy Commission

4.3.1 Background
The City of Manteca’s Waste to Fuel Program will be the first example of a new approach to demonstrate cost effective methods to comply with AB1826 legislation which affects solid waste by utilizing synergies available  to  municipalities  at  their  local  wastewater  treatment  plant.  The  project  was  completed  on December 2019.

The project produces vehicle fuel from co‐digested food waste and sewage sludge to generate digester gas that will be processed into transportation fuel for the City of Manteca Solid Waste and other vehicle fleets.  Intercepting landfill bound food waste reduces greenhouse gases in two ways.  First, it reduces fugitive emissions of methane at landfills.  Second, methane produced from co‐digestion of the food waste with  sewage  sludge  is  used  to  offset  diesel  usage  in  the  solid  waste  collection  and  other  City  fleets, creating a renewable low carbon fuel source for the community.

4.3.2 Project Description
Prepare the final report using the CA Energy Commission template (included as Appendix A).

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a. Project Number: ARV‐16‐027 (Amendment 03)
b. Please use the template included at the end of the RFP c. Final Outline of Final Report: September 30, 2022
d. Draft Final Report: November 15, 2022
e. Final Report to CA Energy Commission due: December 20, 2022

4.4 WQCF Capacity Studies Technical Memorandum (TM)
Prepare  technical memorandum detailing all of  the projects included in  this RFP. The TM shall include detailed design information including, but not limited to, pump sizing, design layouts, and other design information needed for future reference. The TM shall be submitted once all design has been completed to ensure the final design information is accurate.

The WQCF needs to maintain normal operation at all times during the construction phase. The following projects  need  to  be  designed  and  constructed  in  a  way  that  minimizes  downtime  and  maintains operation of the WQCF.

4.5 Replace Internal Mixed Liquor Recycle (IMLR) Pumps

4.5.1 Background
The North and South Plants each include five aeration basins. The aeration basins, secondary clarifiers, and return activated sludge/waste activated sludge pump stations are often collectively referred to as the secondary treatment or the activated sludge process. Operation of these facilities requires a significant degree of monitoring and adjustments to ensure that the process is performing well.

The purpose of the aeration basins is to remove BOD, Nitrogen and remaining settleable solids also known as Total Suspended Solids (TSS) from the liquid stream. Efficient operation of the activated sludge process should produce a final effluent that complies with the BOD, TSS, and nitrogen requirements of the NPDES permit.

The northside aeration basins are designated as Aeration Basin Nos. 1‐5. Aeration Basin Nos. 1‐3 were constructed  in  1986.  Aeration  Basin  Nos.  4  and  5  were  constructed  in  2002  as  part  of  the  Phase  III Expansion, Schedule A Project. The Phase III Expansion Project included replacing the aeration panels in the existing basins and modifications to enable full nitrification and denitrification. The northside aeration basins include the following components: concrete basins, blowers, diffuser panels, air distribution piping, effluent channel gates, effluent channel telescopic valves, recirculation pumps, and mixers.

The southside aeration basins, designated as Aeration Basin Nos. 6‐10, were constructed in 2003‐2005 as part of the Phase III Expansion, Schedule B Project. The southside aeration basins include the following components: concrete basins, blowers, diffuser panels, air distribution piping, recirculation pumps, and mixers. The components are described below.

4.5.2 Project Description
This project entails replacing the IMLR pumps in all ten aeration basins in both North and South Plants to attain a capacity of at least 2.8 Mgal/d per basin in the North Plant and 3.6 Mgal/d per basin in the South Plant (even higher capacity would provide more flexibility). Existing recirculation pump capacity is about ATTACHMENT 2
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2 Mgal/d per basin in both plants. In addition to replacing the pumps, provide variable frequency drives, IMLR flow meters, and related controls so that IMLR flows can be automatically controlled in proportion to plant flow rates. Additionally, provide all the analyzers required for proper nitrification/denitrification process  control  in  each  Zone.  Improvements  to  the  supervisory  control  and  data  acquisition  (SCADA) features to track flow information may be required.

This project requires draining one aeration basin at a time (10 existing aeration basins). The City is looking for recommendation on project sequencing  that keeps  the WQCF in operation while at  the same  time completing this project.
a. North Plant ‐ Replace the existing (5) IMLR pumps with new (5) wall pumps rated at 3.0 Mgal/d at 2.3 feet, 4.9 hp each.
b. South Plant ‐ Replace the existing (5) IMLR pumps with new (5) wall pumps rated at 4.0 Mgal/d  at  2.0  feet,  6.5  hp  each.  Replace  12”  stainless  steel  IMLR  pipe  with  new  14” stainless steel IMLR pipe.
c. Provide  (5) 10 hp wall‐mount VFDs at each plant. Provide support with  the RWQCB in coordinating  plant  operations  during  construction.  This  includes  putting  together documentation and meetings with the RWQCB.
d. Provide concrete bases, SCADA programming, P&ID drawings of new pumps, equipment numbering  per  the  City’s  Equipment  Naming  Convention  (see  Appendix  F), instrumentation, and required electrical work.

4.6 Fix Flow Split to The North Plant Aeration Basins

4.6.1 Background
The  primary  sedimentation  basins  are  rectangular  concrete  units  with  concurrent  scum  and  sludge removal. Each sedimentation basin has two inlet openings, each fitted with a stop gate frame (G07‐03 through G07‐08),  for  flow  distribution  control and  shutdown  of the  basin. Spray  nozzles are mounted across the inlet end of each basin. The spray nozzles direct a fine spray of 2W water at the wastewater surface and consequently push the floating materials out of the inlet end of the basin into the return path of the longitudinal sludge collecting flights which push the floating materials to the basin scum skimmer.

In each  basin,  a  PVC  ball  valve  in  the  spray  header/2W  water  connection  provides  for  shutdown  and throttling of the spray water flow.

In each basin, the settled wastewater is collected by three effluent launder troughs with V‐notch overflow weirs. The outlet of each effluent launder is  fitted with a stop gate  for isolation. The effluent launders discharge the collected wastewater into the primary effluent channel. Refer to appendices for additional information.

The original design was to have 44% of the total flow treated by the North Plant and 56% of the total flow treated by the South Plant.  However, staff have encountered Nitrogen removal when 44% of the total flow is sent to the North Plant.  The North Plant is known to have poor flow split between the aeration basins which is suspected to contribute to the poor treatment performance.

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4.6.2 Project Description
This project entails investigating the root cause and determine what is preventing the North Plant from handling 44% of the total flow. At a minimum, this project will need to address the unequal flow splitting between the aeration basins. Refer to appendices for additional information. Improvements to the SCADA features to track the flow split between each aeration basin should be considered and coordinated with the operation staff.

4.7 Add New Independent Mixing System to Zone B
Provide improved aeration instrumentation and controls and additional mixing facilities to allow all Zone Bs to operate with less airflow and at a lower DO concentrations. The mixing facilities are needed to keep the solids in Zone B suspended when air flows needed to attain low DO concentrations are lower than air flows required to keep the zones mixed. Improvements to the SCADA features to track total air deliveries to each zone in each basin will be required to assist with process troubleshooting and optimization.

4.8 Add Process Aeration Control to Improve Monitoring and Control of Denitrification

4.8.1 Background
The existing aeration control system monitors and does a good job of controlling Dissolved Oxygen (DO) in each aerobic  zone  of  the aeration  basins. However,  oxidation  reduction  potential  (ORP), ammonia, nitrite, and nitrate are not monitored. Plant staff have installed  temporary ORP, ammonia, and nitrate probes in a few basins to help diagnose issues with meeting nitrate+nitrite limits. The monitoring of DO, ORP, ammonia, nitrite, and nitrate in each zone is critical to optimizing the performance of each aeration basin and quickly identifying operational issues with the basins.

4.8.2 Project Description
This  project  entails  working  with  WQCF  staff  to  determine  what  additional  analyzers  are  needed  to monitor and  optimize  performance  of  the all aeration  basins.  This  project  will  install at a minimum a permanent monitoring system in all ten (10) aeration basins to monitor:
 oxidation reduction potential (ORP)
 ammonia
 nitrite
 nitrate
In addition to the process control instrumentation, finetuning the air flow control requires replacing the existing 4‐in air flow control valves for Zone B.
 Evaluate different options for the monitoring system with WQCF staff that include costs, probe types,  etc.  that  will  best  meet  the  needs  of  the  treatment  process  and  can  be  efficiently maintained. The evaluation and final selection of the monitoring system will need to be submitted in a technical memorandum.

4.9 Assist City Staff in Construction Bidding and Contractor Selection Provide  assistance  during  contractor  selection  processes.  The  City  will  require  assistance  with  the following tasks:

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 Coordinate and  conduct  pre‐bid meetings,  prepare  and  distribute  pre‐bid meeting minutes as necessary
 Prepare responses to bidder's inquiries during bid period (RFI’s)  Prepare and distribute bid addenda
 Review  construction  bids  received  and  prepare  a  recommendation  to  the  City  regarding  bid completeness/responsiveness, bidder capabilities, and contract award  Prepare conformed sets of specifications and drawings as directed by City staff

4.10 Assistance and Coordination During Construction
The selected firm will provide engineering services during construction including the following:
 Coordinate and conduct weekly meetings, prepare and distribute meeting minutes as necessary  Prepare responses to bidder's inquiries i.e. RFI’s
 Prepare as‐builts sets of specifications and drawings as directed by City staff  Review contractor submittals for conformance with the design drawings and specifications, and provide  responses  to  contractor.  Consultant  shall  submit  the  necessary  templates  for  the following: RFI  responses,  submittal  responses, etc.  to  provide support  during  the  construction phase of the project
 Coordinate with City on change order requests
 Provide services needed during construction
 Coordinate WQCF shut downs, and sequencing between City and construction staff

4.11 Operations & Maintenance Manuals
Consultant  shall update  the City’s Operations and Maintenance Manual  (O&M Manual)  to include  the projects in this RFP (excludes the CA Energy Commission Report and TM). The O&M Manual shall follow the format of the sample O&M chapter included as Appendix E, and include:
‐ Table of Contents
‐ Introductory sections i.e. purpose and process summary ‐ Figures
‐ Association with other treatment systems and equipment ‐ Descriptions and specifications
‐ Relevant formulas and calculations
‐ Descriptions of control strategies, instrumentation, alarms, etc. ‐ Problems and troubleshooting guide(s)

4.12 Document Submittals
The  following  document  submittal  guidelines  shall  apply,  except  where  noted,  for  each  document identified for each task.
 Draft version of each document for internal review
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4.13 Deliverables
The Consultant shall provide to the City the following products and services as part of this project and others the consultant deems necessary to provide a complete Project.

Note: this applies to technical documents like the TMs and the CA Energy Commission Final Report.

4.13.1 Draft copies
 One (1) PDF copy
 One (1) electronic version of the complete document in Word 2010 file format  One (1) electronic version in PowerPoint file format (applies to presentations)  One (1) AutoCAD version of figures and exhibits, where needed

4.13.2 Final document
 One (1) PDF copy
 One (1) electronic version of the complete document in Word 2010 file format  One (1) electronic version of the complete document in AutoCAD  One (1) electronic version in PowerPoint file format (applies to presentations)

4.13.3 Project Schedule
Given  the  complexity  and  number  of  documents  required  in  the  Scope  of Work,  the  consultant  shall update the project schedule on a monthly basis. Please submit PDF copy and a copy in Microsoft Project format.
5 Cost Proposal
The proposer must submit a detailed cost proposal for all services and materials anticipated to complete the  Scope  of  Services  with  a  “not‐to‐exceed”  fixed  fee,  which  shall  be  the  sum  of  all  tasks.  The  cost proposal shall be submitted as a separate PDF  file. The  file name shall  follow  this naming convention:
“WQCF  Capacity  Improvements  RFP.pdf”.  Provide  a  fixed  dollar  amount  for  each  of  the  services  and materials as described in the Scope of Services.

Include an hourly rate table for typical planning and engineering classifications that may be requested for separate tasks not included in this RFP.

Consultant  shall  submit  monthly  invoices  listing  work  completed.  Invoices  shall  list  summarize  work broken down hourly rate, position, and material fees
Innovation  is  encouraged  and  expected  to  provide  the  City  with  comprehensive  services  in  the  most efficient and cost effective manner.
6  Proposal Evaluation
City staff will evaluate each proposal for completeness and content. Each proposal will be evaluated based upon the relevant qualifications and experience of the proposer. Staff may choose to interview two or more closely ranked firms, allowing 30 minutes for a presentation of the short‐listed firms and another 30  minutes  for  a  questions/answer  session.    License  status  and references  will  also  be  verified.  The proposal review will focus on the following criteria:

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a. Project  Management  (15  points).  Components  of  project  management  that  demonstrate capability  in  management  of  projects  of  this  scope.  Include  a  sample  monthly  report.  Please include a project schedule that accounts for the Scope of Services. b. Project Understanding/Project Approach (40 points). The proposal adequately demonstrates an understanding  and  experience  in  preparing  similar  potable  water  projects  for  municipalities.

Innovative approaches for alternative solutions and recommendations are preferred. c. Experience  (40  points).  The  firm’s  expertise  and  professional  qualifications  with  similar  work.

Qualifications of the firm and individuals assigned to perform the work. d. Project schedule (5 points). Thoroughness of the project schedule, ability to complete the project within the selected timeframe.
7 Acceptance or Rejection of Proposal
The City reserves the right to accept or reject any and all proposals.  The City also reserves the right to waive any informality or irregularity in any proposal or in the bidding as deemed to be in its best interest.

Additionally, the City may, for any reason, decide not to award an agreement as a result of this RFP or cancel  the RFP process.  The City shall not be obligated  to respond  to any proposal submitted, nor be legally bound in any manner by the submission of the proposal.  The City reserves the right to negotiate Project deliverables and associated costs.

The  City  may  require  selected  consultant  to  submit  additional  data  or  information  the  City  deems necessary  to  substantiate  the  costs  presented  by  the  proposer.    The  City  may  also  require  selected consultant to revise one or more elements of its proposal in accordance with contract negotiations. 8 Agreement for Professional Services
Refer to Appendix C for the City’s Agreement for Professional Services. 9 Insurance Requirements
Additionally,  the successful proposer shall also secure all insurance  required under  the Agreement  for Professional Services and provide any necessary documentation to the City as part of the Agreement for Professional Services. Refer to Appendix D for details.

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APPENDIX A
Clean Transportation Program

FINAL PROJECT REPORT
Title of Report, in Title Case
With Capitalized Words
Except for Some Small
Words Like a, the, and, for
Subtitle of Report, If Used
Prepared for: California Energy Commission
Prepared by: Name of Recipient
Month 202X | CEC-600-202X-XXX
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APPENDIX A
California Energy Commission
Author(s) Names Go Here
One Name per Line
Primary Author(s)
XYZ Company, Inc.
123 Main Street
Anywhere, CA 95814
(916) XXX-XXXX (optional)
Company Website (www.companywebsite.com) (optional)
Agreement (or Contract) Number: XXX-XXXX-XXX
Name Goes Here
Commission Agreement Manager
Name Goes Here
Office Manager

OFFICE NAME GOES HERE
Hannon Rasool
Deputy Director

FUELS AND TRANSPORTATION
Drew Bohan
Executive Director

DISCLAIMER
This report was prepared as the result of work sponsored by the California Energy Commission (CEC). It does not necessarily represent the views of the CEC, its employees, or the State of California. The CEC, the State of California, its employees, contractors, and subcontractors make no warrant, express or implied, and assume no legal liability for the information in this report; nor does any party represent that the use of this information will not infringe upon privately owned rights. This report has not been approved or disapproved by the CEC nor has the CEC passed upon the accuracy or adequacy of the information in this report.

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APPENDIX A
i

ACKNOWLEDGEMENTS
Acknowledgement text goes here.

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APPENDIX A
ii

PREFACE
Assembly Bill 118 (Núñez, Chapter 750, Statutes of 2007) created the Clean Transportation Program. The statute authorizes the California Energy Commission (CEC) to develop and deploy alternative and renewable fuels and advanced transportation technologies to help attain the state’s climate change policies. Assembly Bill 8 (Perea, Chapter 401, Statutes of 2013) reauthorizes the Clean Transportation Program through January 1, 2024, and specifies that the CEC allocate up to $20 million per year (or up to 20 percent of each fiscal year’s funds) in funding for hydrogen station development until at least 100 stations are operational.

The Clean Transportation Program has an annual budget of about $100 million and provides financial support for projects that:
• Reduce California’s use and dependence on petroleum transportation fuels and increase the use of alternative and renewable fuels and advanced vehicle technologies. • Produce sustainable alternative and renewable low-carbon fuels in California. • Expand alternative fueling infrastructure and fueling stations. • Improve the efficiency, performance and market viability of alternative light-, medium-, and heavy-duty vehicle technologies.
• Retrofit medium- and heavy-duty on-road and nonroad vehicle fleets to alternative technologies or fuel use.
• Expand the alternative fueling infrastructure available to existing fleets, public transit, and transportation corridors.
• Establish workforce-training programs and conduct public outreach on the benefits of alternative transportation fuels and vehicle technologies.

To be eligible for funding under the Clean Transportation Program, a project must be consistent with the CEC’s annual Clean Transportation Program Investment Plan Update. The CEC issued solicitation number, or agreement number if not via competitive solicitation to describe purpose of solicitation/agreement. In response to solicitation number, the recipient submitted an application which was proposed for funding in the CEC’s notice of proposed awards date of NOPA and the agreement was executed as agreement number on date of execution.

Note: If needed, insert a blank page so that the Abstract begins on the left side in two-page electronic view (same side as the cover page).

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APPENDIX A
iii

ABSTRACT
Abstract text goes here.

Keywords: (Required for all Commission Reports/Papers)
Citation is required for all reports/papers.

If there is no Acknowledgements page, the citation goes at the bottom of the Preface page; if there is no Preface, the citation goes on the reverse side of the credits page.

Please use the following citation for this report:

Author(s) Last Name, First Name, subsequent author(s) are First Name Last Name. 202X. Title of Report. California Energy Commission. Publication Number: CEC-600-202X-XXX.

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APPENDIX A
iv
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APPENDIX A
v

TABLE OF CONTENTS
Page
Acknowledgements (Optional) .............................................................................................. i Preface...............................................................................................................................ii Abstract (Required for all Commission Reports/Papers) ........................................................ iii Table of Contents................................................................................................................ v List of Figures ..................................................................................................................... v List of Tables ...................................................................................................................... v Executive Summary............................................................................................................. 1 Executive Summary Subheading........................................................................................ 1 Executive Summary Sub-subheading, If You Absolutely Need It (But Don’t Push It.) ......... 1 CHAPTER 1: Why Is This Paper Important............................................................................ 2 Heading 3: Please Read This Paper ................................................................................... 3 Heading 4: This Is a Good Paper.................................................................................... 3 Glossary ............................................................................................................................. 5 APPENDIX A: Name of Appendix ..................................................................................... A-1 Appendix Subheading................................................................................................... A-1 Appendix Sub-subheading.......................................................................................... A-1

LIST OF FIGURES
Page
Figure 1: Text Goes Here in Title Case .................................................................................3

LIST OF TABLES
Page
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APPENDIX A
vi
Note: If needed, insert a blank page so that Executive Summary begins on the left side in twopage electronic view (same side as the cover page).

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APPENDIX A
1 EXECUTIVE SUMMARY
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Executive Summary Subheading
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Executive Summary Sub-subheading, If You Absolutely Need It (But Don’t Push It.)
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APPENDIX A
2 Note: If needed, insert a blank page so that Chapter 1 begins on the left side in two-page electronic view (same side as the cover page).

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APPENDIX A
3 CHAPTER 1:

Why Is This Paper Important
Heading 3: Please Read This Paper
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Heading 4: This Is a Good Paper
Type here as well.

Heading 5: Are You Interested Yet?
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Heading 6: Use Only If Necessary1
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Figure 1: Text Goes Here in Title Case
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1 ATTACHMENT 2
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APPENDIX A
4 Source: text goes here
Table 1: Text Goes Here in Title Case
Header row 1 Header row 2 Header row3 Header row 4 Header row 5 Data 1 Data 2 Data 3 Data 4 Data 5
Source: California Energy Commission staff
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APPENDIX A
5 GLOSSARY
(These are typical glossary entries. modify this section based on the contents of your report) ALTERNATING CURRENT (AC)—Flow of electricity that constantly changes direction between positive and negative sides. Almost all power produced by electric utilities in the United States moves in current that shifts direction at a rate of 60 times per second. (Entries found in the the CEC glossary web page,
https://www.energy.ca.gov/resources/energy-glossary, do not require footnote citations) BATTERY ELECTRIC VEHICLE (BEV)—Also known as an “All-electric” vehicle (AEV), BEVs utilize energy that is stored in rechargeable battery packs. BEVs sustain their power through the batteries and therefore must be plugged into an external electricity source in order to recharge.

CALIFORNIA DEPARTMENT OF TRANSPORTATION (Caltrans)—Responsible for the design, construction, maintenance, and operation of the California State Highway System, as well as that portion of the Interstate Highway System within the state's boundaries.2 (Entries that aren’t listed in the CEC online glossary use footnotes, like the one above, to cite the most credible source available)
CALIFORNIA ENERGY COMMISSION (CEC)—The state agency established by the WarrenAlquist State Energy Resources Conservation and Development Act in 1974 (Public Resources Code, Sections 25000 et seq.) responsible for energy policy. The Energy Commission's five major areas of responsibilities are:

1. Forecasting future statewide energy needs

2. Licensing power plants sufficient to meet those needs

3. Promoting energy conservation and efficiency measures

4. Developing renewable and alternative energy resources, including providing assistance to develop clean transportation fuels

5. Planning for and directing state response to energy emergencies.

COMPRESSED NATURAL GAS (CNG)—Natural gas that has been compressed under high pressure, typically between 2,000 and 3,600 pounds per square inch, held in a container. The gas expands when released for use as a fuel.

DIRECT CURRENT (DC)—A charge of electricity that flows in one direction and is the type of power that comes from a battery.

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APPENDIX A
A-1
APPENDIX A:

Name of Appendix
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Appendix Subheading
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Appendix Sub-subheading
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Appendix Sub-sub-subheading
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Appendix Sub-sub-sub-subheading
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APPENDIX A
Instructions:

Determine if the final project report you are working on is considered a backlog report which would use the Abbreviated Publishing Procedure Routing Log. (The abbreviated process is to be discontinued when the backlog project is finished) If not, continue with the Publishing Procedure Routing Log and add the name of the appropriate supervisor. (for projects “active” in PIMS on 4/1/2019 and later) After selecting a log, delete these instructions and the unnecessary version of the routing log. Turn on tracked changes and create a comment tied to the “ROUTING LOG” below. Then continue to follow the E-routing instructions.

ROUTING LOG
Abbreviated Publishing Procedure Routing Log
Publication Approval Chain @Mention:

Supervisor Wendell Krell (for supervisor)
Office Manager N/A
Media Office N/A
Legal N/A
Deputy/Small Office Director Melanie Vail
OGA (if report is legislatively mandated) N/A
Executive Office N/A
Lead Commissioner N/A
Route to Spencer Kelley and Wendell Krell after John Butler approves the report for publication.

Publishing Procedure Routing Log
Publication Approval Chain @Mention:

Supervisor List FTD Supervisor Here
Office Manager N/A
Media Office Carol Robinson, Lana McAllister
Legal N/A
Deputy/Small Office Director Melanie Vail
OGA (if report is legislatively mandated) N/A
Executive Office Gaylene Cooper
Lead Commissioner N/A
Route to Spencer Kelley after the Executive Office approves the report for publication.

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APPENDIX A
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APPENDIX B

1. REPLACE INTERNAL MIXED LIQUOR RECYCLE (IMLR) PUMPS
The internal mixed liquor recycle (IMLR) pumps are used to transfer mixed liquor from the downstream end of each aeration basin back to the anoxic zone at the upstream end of the aeration basin. Process modeling shows the existing pumps are too small and the removal of additional nitrogen from the system requires returning more flow to the front of the aeration basins. Currently, there are no provisions for monitoring or control of the IMLR flow. To optimize nitrogen removal, the IMLR pumps must be flow paced in proportion to the influent flow to the basins. This will be achieved by adding a VFD drive and submersible magnetic flow meter for each pump and integrating the pump controls into the plant Supervisory Control and Data Acquisition (SCADA) system. The flow increase for the South Plant requires replacing the 12” IMLR pipe with a 14” IMLR pipe to keep the head condition on the lowhead propeller pumps within a reasonable range.

There is no space in the existing MCCs at either plant to accommodate VFD drives for the IMLR pumps.

In the North plant, the VFDs will be located on the wall opposite MCC-05-01 in the lower blower gallery.

In the South Plant, the VFDs will be located on the wall opposite MCC-06-01, even though this space was intended for the future Phase IV Expansion. Like the RAS pumps, the immediate need is a higher priority than the possible future need in the Phase IV Expansion, which will be re-evaluated as part of the next wastewater master plan.

Replacing the IMLR pumps for each plant would consist of the following:
• North Plant - Replace the existing (5) IMLR pumps with new (5) wall pumps rated at 3.0 Mgal/d at

2.3 feet, 4.9 hp each.
• South Plant - Replace the existing (5) IMLR pumps with new (5) wall pumps rated at 4.0 Mgal/d at

2.0 feet, 6.5 hp each. Replace 12” stainless steel IMLR pipe with new 14” stainless steel IMLR pipe. • Provide (5) 10 hp wall-mount VFDs at each plant.
• Miscellaneous piping, instrumentation, SCADA, and electrical work.

Project costs for the for replacement of the IMLR pumps at the North and South Plants are presented in Table A-3.

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APPENDIX B
Table A-3 Project Costs for Replacement of IMLR Pumps at Both Plants Description Cost
IMLR Pump Systems $ 1,101,000
Subtotal $ 1,101,000
Bonds/Mobilization/Demobilization 6%
Bonds/Mobilization/Demobilization $ 66,000
Subtotal $ 1,167,000
Contingency 20%
Contingency $ 233,000
Total $ 1,400,000
Engineering Design
6% 84,000 $
Manteca Staff Costs
6% 84,000 $
Engineering Services During Construction
6% 84,000 $
Construction Management and Inspection
15% 211,000 $
Total Project Cost $ 1,863,000
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APPENDIX B

2. FIX FLOW SPLIT TO THE NORTH PLANT AERATION BASINS
WQCF staff have reported poor performance when sending the desired 44% of the total influent flow to the North plant. As a result, plant staff sends less flow to the North Plant, which puts more stress on the South Plant. The North plant is known to have a poor flow split between the aeration basins and this is thought to be the primary cause of the poor performance; however, there may be other contributing factors that have not been identified. The flow split for the North Plant is accomplished with downward opening weir gates on the side of the aeration basin influent channel. Because the basins were constructed at different times and were a retrofit of the original primary clarifiers, the influent channel has a 24” step in the bottom of the channel where the old Parshall Flume was installed and the outlet gates vary in size from 3 feet wide to 6 feet wide. Evenly splitting flow under variable flow conditions with this arrangement is impossible.

The proposed fix is to install a fiber reinforced plastic (FRP or fiberglass) box and weir around each gate inside the aeration basin. The same weir length would be provided for all aeration basins and all weirs would be at the same elevation.

Project costs for the for installation of the FRP weir boxes to fix the flow split for the North Plant are presented in Table A-4.

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APPENDIX B
Table A-4 Project Costs for Fixing Flow Split in North Plant Description Cost
Flow Splitter Boxes $ 157,000
Subtotal $ 157,000
Bonds/Mobilization/Demobilization 6%
Bonds/Mobilization/Demobilization $ 9,000
Subtotal $ 166,000
Contingency 20%
Contingency $ 33,000
Total $ 199,000
Engineering Design (1)
25% 50,000 $
Manteca Staff Costs
6% 12,000 $
Engineering Services During Construction
6% 12,000 $
Construction Management and Inspection
16% 31,000 $
Total Project Cost $ 304,000
Notes: 1) Design cost is higher in proportion to construction cost because of extensive hydraulic modeling required for this alternative.

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APPENDIX B

3. ADD NEW INDEPENDENT MIXING SYSTEM TO ZONE B
Section 3 recommends lowering the air flow to Zone B of each aeration basin even further than currently practiced to reduce the dissolved oxygen (DO) level in the zone and thereby improve denitrification. Currently, when the air is turned down to its lowest level, there is not enough mixing in the zone and the mixed liquor solids begin to settle. To counter this, a separate mixing system for Zone B that is independent of the air flow to the zone is needed. The new mixing system must be compatible with the existing fine bubble diffuser system. Propeller mixers, such as used for Zone A would damage the diffuser system and will, therefore, not work in Zone B.

The proposed mixing system for Zone B that is compatible with the existing diffusers is an intermittent coarse bubble compressed gas mixing system. This system uses high pressure air with nozzles and valves to create large bubbles that mix the tank. The mixing is controlled independent of the aeration air flow. A separate system with control panel for each plant would be provided.

Installing a separate mixing system for Zone B of each aeration basin would consist of the following:
• Coarse bubble mixing system in each plant.
• Miscellaneous small diameter high pressure air piping. • Miscellaneous instrumentation, SCADA, and electrical work.

Project costs for the for installation of the Zone B mixing systems are presented in Table A-5.

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APPENDIX B
Table A-5 Project Costs for Zone B Mixing System in All Aeration Basins Description Cost
Zone B Mixing $ 1,213,000
Subtotal $ 1,213,000
Bonds/Mobilization/Demobilization 6%
Bonds/Mobilization/Demobilization $ 73,000
Subtotal $ 1,286,000
Contingency 20%
Contingency $ 257,000
Total $ 1,543,000
Engineering Design
6% 93,000 $
Manteca Staff Costs
6% 93,000 $
Engineering Services During Construction
6% 93,000 $
Construction Management and Inspection
15% 230,000 $
Total Project Cost $ 2,052,000
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APPENDIX B

4. ADD PROCESS AERATION CONTROL TO IMPROVE MONITORING AND

CONTROL OF DENITRIFICATION
The existing aeration control system monitors and does a good job of controlling Dissolved Oxygen (DO) in each aerobic zone of the aeration basins. However, oxidation reduction potential (ORP), ammonia, and nitrate are not monitored. WQCF plant staff have installed temporary ORP, ammonia, and nitrate probes in a few basins to help diagnose issues with meeting nitrate limits. The monitoring of ORP, ammonia, and nitrate in each basin is critical to optimizing the performance of each aeration basin and quickly identifying operational issues with the basins. The temporary monitoring program set up by WQCF staff needs to be expanded to permanent installations in all 10 basins. Because the South Plant was recently retrofitted with new HACH 1000 controllers, probes only and no new controllers are needed for the South Plant. The North Plant will require new probes and HACH 4500 controllers.

The ORP signal from Zone B would be used to control the air flow to Zone B. The ammonia and nitrate probes will be used to monitor nitrogen removal through the process.

In addition to the process control instrumentation, properly controlling the air flow to very low levels requires replacing the existing 4” air flow control valves for Zone B with 2” or 3” air flow control valves.

Adding additional process control and monitoring of each aeration basin would consist of the following:
• Replace 4” air flow control valves with 2” air flow control valves (10) total. • North Plant – install (5) SC4500 controllers, (5) ORP probes in Zone B, (5) Nitrate/NH4 probes in Zone B.
• South Plant – install (5) ORP probes in Zone B, (5) Nitrate/NH4 probes in Zone B. • Miscellaneous piping, instrumentation, SCADA, and electrical work.

Project costs for the for installation of additional process aeration control and monitoring are presented in Table A-6.

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APPENDIX B
Table A-6 Project Costs for Additional Process Aeration Control and Monitoring Description Cost
Process Aeration Control $ 537,000
Subtotal $ 537,000
Bonds/Mobilization/Demobilization 6%
Bonds/Mobilization/Demobilization $ 32,000
Subtotal $ 569,000
Contingency 20%
Contingency $ 114,000
Total $ 683,000
Engineering Design
6% 41,000 $
Manteca Staff Costs
6% 41,000 $
Engineering Services During Construction
6% 41,000 $
Construction Management and Inspection
15% 102,000 $
Total Project Cost $ 908,000
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EXHIBIT 1
Insurance Requirements for Professional Services

INSURANCE REQUIREMENTS
Consultants shall procure and maintain for the duration of the contract insurance against claims for injuries to persons or damages to property which may arise from or in connection with the performance of the work hereunder by the Consultant, his agents, representatives, employees or subcontractors.

Minimum Limits of Insurance: Coverage shall be at least as broad as:

Commercial General Liability
 Commercial General Liability Insurance with $2,000,000 minimum limit per occurrence.  If a general aggregate limit applies, either the general aggregate limit shall apply separately to this project/location or the general aggregate limit shall be twice the required occurrence limit.  Commercial General Liability Additional Insured Endorsement naming the following as insured on 2001 or earlier issued endorsement forms:
“City of Manteca, its officers, officials, employees, agents, and volunteers”.

Automobile Liability
If the vehicles are brought onto city facilities, covering any auto, or of Contractor has no owned autos, hired, and non-owned autos, the Contractor shall maintain automobile liability with limits no less than:
 Automobile Liability Insurance with $1,000,000 minimum limit per accident for bodily injury and property damage.
 Automobile Liability Additional Insured Endorsement naming the following as additional insured:
“City of Manteca, its officers, officials, employees, agents, and volunteers”.

Worker’s Compensation
As required by the State of California, with Statutory Limits, and Employer’s Liability Insurance with limit of no less than $1,000,000 per accident for bodily injury or disease.

Professional Liability (Errors and Omissions)
Insurance appropriates to the Contractor’s profession, with limit no less than $2,000,000 per occurrence or claim, $2,000,000 aggregate
Other Insurance Provisions:

The insurance policies are to contain, or be endorsed to contain, the following provisions:

1. The City of Manteca, its officers, officials, employees, agents and volunteers are to be covered as insured’s as respect to: liability arising out of work or operations performed by or on behalf of the Consultant including materials, parts, or equipment furnished in connection with such work operations. General liability coverage can be provided in the form of an endorsement to the Consultant’s insurance at least as broad as CG 20 10 and CG 20 37 if completed operations coverage is required.

2. For any claims related to this contract, the Consultant’s insurance coverage shall be primary insurance as respects the City, its officers, officials, employees, agents and volunteers. Any insurance or self-insurance maintained by the City, its officers, officials, employees, agents or volunteers, shall be excess of the Consultant’s insurance and shall not contribute with it.

RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX D
ATTACHMENT 2
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3. The applicant’s insurance shall apply separately to each insured against whom claim is made or suit is brought, except with respect to the limits of the insurer’s liability.

4. Each insurance policy required by this clause shall be endorsed to state that coverage shall not be suspended, voided, canceled by either party, reduced in coverage or in limits except after thirty (30) days prior written notice by certified mail, return receipt requested, has been given to the City of Manteca.

Verification of Coverage
Consultant shall furnish the City with original certificates and amendatory endorsements or copies of the applicable policy language effecting coverage required by this clause. All certificates and endorsements are to be received and approved by the Entity before work commences. However, failure to obtain the required documents prior to the work beginning shall not waive the Consultant’s obligation to provide them. The City of Manteca reserves the right to require complete, certified copes of all required insurance policies, including endorsements required by these specifications, at any time.

Notice of Cancellation
Each insurance policy required above shall provide that coverage shall not be canceled, except with notice to the Entity.

Acceptability of Insurers
Insurance is to be placed with insurers with a current A.M. Best’s rating of no less than A:VII, unless otherwise acceptable to the City of Manteca
Waiver of Subrogation
Consultant hereby grants to The City of Manteca a waiver of any right to subrogation which any insurer of said Consultant may acquire against the Entity by virtue of the payment of any loss under such insurance.

Consultant agrees to obtain any endorsement that may be necessary to affect this waiver of subrogation, but this provision applies regardless of whether or not the Entity has received a waiver of subrogation endorsement from the insurer.

Subcontractors
Consultant shall require and verify that all subcontractors maintain insurance meeting all the requirements stated herein, and Contractor shall ensure that The City of Manteca is an additional insured on insurance required from subcontractors.

SPECIAL RISKS OR CIRCUMSTANCES
The City of Manteca reserves the right to modify these requirements based on the nature of the risk, prior events, insurance coverage, or other special circumstances.

RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX D
ATTACHMENT 2
Stantec Consulting Services Inc. 7.i
Manteca WWTP O&M Manual
Chapter 7
Secondary Clarifiers
Table of Contents
PURPOSE ..................................................................................................................... 3 PROCESS DESCRIPTION ............................................................................................. 4 RELATIONSHIP TO OTHER EQUIPMENT .................................................................... 10 OPERATION AND DESCRIPTION .............................................................................. 11 Center Feed Column ........................................................................................ 12 Drive Unit ............................................................................................................ 12 Energy Dissipation Inlet (EDI) ............................................................................ 12 Feedwell ............................................................................................................. 12 Sludge Rake Arms ............................................................................................. 12 Ducking Skimmer ............................................................................................... 12 Rotating Scum Pipe........................................................................................... 13 Effluent Weir ....................................................................................................... 13 Effluent Launder ................................................................................................ 13 Pressure Relief Valves ........................................................................................ 13 Secondary Clarifier Specifications .................................................................. 14 Power Distribution .............................................................................................. 15 Operational Parameters ................................................................................... 16 Design Criteria ................................................................................................... 20 Operational Considerations and Process Control ......................................... 21 CONTROLS AND INSTRUMENTATION ...................................................................... 22 Clarifier Drive Control Description ................................................................... 22 Clarifier Drive Status and Alarms ...................................................................... 23 Rotating Scum Pipe........................................................................................... 23 MONITORING AND MAINTENANCE ....................................................................... 26 Safety .................................................................................................................. 26 SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Table of Contents
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Manteca WQCF O&M Manual
Routine Operations ........................................................................................... 27 Preventative Maintenance .............................................................................. 28 STARTUP/SHUTDOWN PROCEDURES ...................................................................... 29 General Procedures .......................................................................................... 29 Pre-Startup Procedures ..................................................................................... 29 Startup Procedures ........................................................................................... 30 Shutdown Procedures....................................................................................... 32 POTENTIAL PROBLEMS AND TROUBLESHOOTING .................................................. 35 Process Troubleshooting ................................................................................... 35 Mechanical Troubleshooting ........................................................................... 35 Tables
Table 7-1 Northside Secondary Clarifiers Specifications ................................... 14 Table 7-2 Southside Secondary Clarifiers Specifications ................................... 14 Table 7-3 Northside Facility Power Distribution Information .............................. 15 Table 7-4 Southside Facility Power Distribution Information .............................. 16 Table 7-5 Northside Secondary Clarifiers Design Criteria .................................. 20 Table 7-6 Southside Secondary Clarifiers Design Criteria ................................. 20 Table 7-7 Clarifier Drive Unit Control Summary .................................................. 22 Table 7-8 Clarifier Drive Unit Status and Alarm Summary ................................. 23 Table 7-9 Rotating Scum Pipe Control Summary .............................................. 23 Table 7-10 Clarifier Routine Operation Tasks ....................................................... 27 Table 7-11 Clarifier Preventative Maintenance Schedules ............................... 28 Table 7-12 Troubleshooting Guide ........................................................................ 35 Figures
Figure 7-1 Northside Secondary Clarifiers Plan View ........................................... 5 Figure 7-2 Southside Secondary Clarifiers Plan View ........................................... 6 Figure 7-3 Secondary Typical Section View .......................................................... 7 Figure 7-4 Southside Clarifier Splitter Box Plan and Section View ....................... 8 Figure 7-5 Secondary Clarifier Process Flow Schematic ...................................... 9 Figure 7-6 Northside Facility Secondary Clarifier Rotating Scum Pipe LCP ..... 24 Figure 7-7 Southside Facility Secondary Clarifier Rotating Scum Pipe LCP ..... 24 SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Purpose
Stantec Consulting Services Inc. 7.3
Manteca WWTP O&M Manual

PURPOSE
The purpose of the secondary clarifiers is to separate settleable solids from aeration basin effluent, also known as mixed liquor, leaving a high-quality secondary effluent. Suspended solids in the mixed liquor settle to the bottom while the clarified effluent overtops a weir into a collection trough for conveyance to downstream processes. Effective operation of the secondary clarifiers is critical for the WQCF to produce effluent that complies with BOD, TSS, and nitrogen requirements of the NPDES permit.

The secondary clarifiers are one component of the secondary treatment process, also known as the Activated Sludge process. Other major systems include the Aeration Basins and RAS/WAS Pump Stations.

Operation of these systems require a significant degree of monitoring and adjustment to ensure that the overall Activated Sludge process is performing well. This chapter provides detail regarding proper operation of the secondary clarifiers. Refer to the following chapters for information on other secondary treatment facilities:
 Chapter 6 – Aeration Basins
 Chapter 8 – RAS/WAS Pump Stations
 Chapter 9 – Secondary Process Control
A process flow diagram illustrating how these systems interact with one another is presented in Chapter 9 – Secondary Process Control.

SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Relationship to Other Equipment
Stantec Consulting Services Inc. 7.4
Manteca WWTP O&M Manual

PROCESS DESCRIPTION
There are five total secondary clarifiers at the Manteca WQCF: three at the Northside Facility (ME0901, ME0902, and ME0903) and two at the Southside Facility (CLAR-07-01 and CLAR-07-02).

All the clarifiers are similar in configuration and operation.

The secondary clarifiers are circular concrete tanks with a center drive mechanism supported on a stationary center-feed influent column. Mixed liquor influent from the aeration basins enters the secondary clarifiers through the influent column in the center of each unit where energy dissipation occurs. Suspended solids in the mixed liquor settle to the bottom while the clarified effluent overtops a peripheral weir into an effluent launder for conveyance downstream. Sludge and scum collection systems remove settable and floatable solids.

At the Northside Facility, mixed liquor is fed directly from the effluent channel for Aeration Basins 1-5 to the clarifiers. At the aeration basins, Secondary Clarifier No.1 and No. 3 have isolation gate valves and Secondary Clarifier No.2 has two isolation stop gates (STPG-05-01 and -02). See Chapter 06 for additional information.

At the Southside Facility, mixed liquor from Aeration Basins 6-10 flows through the Southside Secondary Clarifiers Splitter Box prior to entering the clarifiers. The splitter box is a 25-foot-square concrete structure equipped with four weir gates (WIRG-07-01 through -04) that is designed to promote even splitting of the flow to each of the two active clarifiers and two future clarifiers. A layout of the splitter box is presented in Figure 7-4.

NOTE: Refer to Figure 7-1 Northside Secondary Clarifiers Plan, Figure 7-2 Southside Secondary Clarifiers Plan, Figure 7-3 Secondary Clarifiers Typical Section, Figure 7-4 Southside Secondary Clarifier Splitter Box Plan and Section, Figure 7-5 Secondary Clarifiers Process Flow Schematic.

SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX E
ATTACHMENT 2

SECONDARY
CLARIFIER NO. 1

SECONDARY
CLARIFIER NO. 2

SECONDARY
CLARIFIER NO. 3
6” D 6” D
6” D
30” ML 30” ML
30” ML
14” RAS
14” RAS
48” SE
14” RAS
36” SE 36” SE 36” SE
A
FIG 7-3
A
FIG 7-3

RAS PUMP STATION
0 5 10 15 20 25

APPROXIMATE SCALE IN FEET
LEGEND

MIXED LIQUOR (ML)

SECONDARY EFFLUENT (SE)

RETURN ACTIVATED SLUDGE (RAS)

DRAIN (D)

STRUCTURE
Figure 7-1
Northside Secondary Clarifier Plan View
V:\1840\active\184031483\drawing\graphics\__________.ai mlm 03-03-2022 City of Manteca

WASTEWATER QUALITY CONTROL FACILITY

OPERATIONS AND MAINTENANCE MANUAL DRAFT
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APPENDIX E
ATTACHMENT 2

SECONDARY
CLARIFIER NO. 5

SECONDARY
CLARIFIER NO. 4

RAS PUMP STATION
SEE CHAPTER 8

SPLITTER BOX

SEE DETAIL
1 FIG 7-4 0 5 10 15 20 25

APPROXIMATE SCALE IN FEET
A
FIG 7-3 SIM
A
FIG 7-3 SIM
LEGEND

MIXED LIQUOR (ML)

SECONDARY EFFLUENT (SE)

RETURN ACTIVATED SLUDGE (RAS)

SCUM SC
RECYCLED WATER (3W)

STRUCTURE
Figure 7-2
Southside Secondary Clarifier Plan View
V:\1840\active\184031483\drawing\graphics\__________.ai mlm 03-03-2022 City of Manteca

WASTEWATER QUALITY CONTROL FACILITY

OPERATIONS AND MAINTENANCE MANUAL DRAFT
SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX E
ATTACHMENT 2

SLUDGE RAKE ARM

SLUDGE WITHDRAWAL RING

CENTER CAGE

ENERGY DISSIPATING INLET
14” RAS 30” ML 6” D

FEED WELL

LAUNDER
COVER
EL. 31.99
EL. 30.79
EL. 30.49 to 29.49
EL. 18.81
A
-

SECTION
NOTE:

SECONDARY CLARIFIER No. 3 IS SHOWN IN THE
TYPICAL SECTION. SECONDARY CLARIFIERS No.1,
No.2, No. 4 AND No. 5 ARE SIMILAR.

LEGEND

MIXED LIQUOR (ML)

SECONDARY EFFLUENT (SE)

RETURN ACTIVATED SLUDGE (RAS)

DRAIN (D)

STRUCTURE
Figure 7-3
Secondary Clarifiers Typical Section View
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WASTEWATER QUALITY CONTROL FACILITY

OPERATIONS AND MAINTENANCE MANUAL DRAFT
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APPENDIX E
ATTACHMENT 2

SECONDARY
CLARIFIER NO. 4

SECONDARY
CLARIFIER NO. 5

SECONDARY
CLARIFIER NO. 4

SECONDARY
CLARIFIER NO. 5
1 -
DETAIL
A
-

SECTION

SECONDARY
CLARIFIER NO.5

SECONDARY
CLARIFIER NO.4
0 2 4 6 8 10

APPROXIMATE SCALE IN FEET
A
-
A
-
LEGEND

MIXED LIQUOR (ML)

SECONDARY EFFLUENT (SE)
RECYCLED WATER (3W)

STRUCTURE
Figure 7-4
Southside Clarifier Splitter Box Plan and Section View
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WASTEWATER QUALITY CONTROL FACILITY

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APPENDIX E
ATTACHMENT 2
ML FROM AERATION BASINS NO.1 - NO.5

ML FROM AERATION
BASINS NO.6 - NO.10

RAS TO AERATION
BASINS NO.6 - NO.10
WAS TO DAF NO.1
WAS TO DAF NO.2
RAS TO AERATION BASINS NO.1 - NO.5

SE TO IRRIGATION

PUMP STATION

SE TO SECONDA

MOTORIZED

BUTTERFLY VALVE

MOTORIZED

BUTTERFLY
VALVE

MOTORIZED
GATE

MOTORIZED

BUTTERFLY
VALVE
RY

EFFLUENT STORAGE POND
SE TO

SECONDARY

EFFLUENT

EQUALIZATION
POND

SE TO FILTER FEED

PUMP STATION
RAS
WAS
WAS
SE
SE
SE
SE
SEC

CLARIFIER
NO.4
SPLIT
BOX
SEC

CLARIFIER
NO.5

CLARIFIER
NO.3
RAS
SE
SE
SE
SE
SE
SE
SE

SOUTHSIDE FACILITIES
ML FROM AERATION BASINS NO.1 - NO.5
ML FROM AERATION BASINS NO.1 - NO.5

ML FROM AERATION
BASINS NO.6 - NO.10
WAS TO DAF NO.1
WAS TO DAF NO.2
ML FROM AERATION BASINS NO.1 - NO.5
RAS TO AERATION BASINS NO.1 - NO.5

MOTORIZED

BUTTERFLY
VALVE

MOTORIZED
GATE

MOTORIZED

BUTTERFLY
VALVE
SE TO

SECONDARY

SE TO FILTER FEED

PUMP STATION
RAS
WAS
SE
SE
SE
RAS
WAS

RAS/WAS PUMP STATION SEC

CLARIFIER
NO.1
SEC

CLARIFIER
NO.4
SPLIT
BOX
SEC

CLARIFIER
NO.5
SEC

CLARIFIER
NO.2
SEC

CLARIFIER
NO.3
RAS
RAS
SE
SE
SE
SE
SE
SE
SE

NORTHSIDE FACILITIES

NORTHSIDE FACILITIES

SOUTHSIDE FACILITIES
LEGEND

MIXED LIQUOR (ML)

SECONDARY EFFLUENT (SE)

RETURN ACTIVATED SLUDGE (RAS)

WASTE ACTIVATED SLUDGE (WAS

STRUCTURE
Figure 7-5
Secondary Clarifiers Schematic
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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Relationship to Other Equipment
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RELATIONSHIP TO OTHER EQUIPMENT
Inflow to the Northside Secondary Clarifiers No. 1, No. 2, and No. 3 includes:
 Mixed liquor effluent from Aeration Basin 1-5 effluent channel that is delivered to each clarifier by gravity.

Outflow from the Northside Secondary Clarifiers No. 1, No. 2, and No. 3 includes  Secondary clarifier effluent that is delivered to the Filter Feed Pump Station and/or Secondary Effluent Equalization Pond by gravity.
 Sludge that is delivered to the RAS/WAS Pump Station by gravity.  Floating solids (scum) that are delivered to the plant sewer system by gravity.

Inflow to the Southside Secondary Clarifiers No.4 and No.5 includes:
 Mixed liquor effluent from Aeration Basin 6-10 effluent channel that is routed through the Southside Secondary Clarifiers Splitter Box to each clarifier by gravity.

Outflow from the Southside Secondary Clarifiers No.4 and No.5 includes:
 Secondary clarifier effluent that is delivered to the Filter Feed Pump Station and/or Secondary Effluent Equalization Pond by gravity.
 Sludge that is delivered to the RAS Pump Station by gravity.  Floating solids (scum) that are delivered to the plant sewer system by gravity.

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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Operation and Description
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OPERATION AND DESCRIPTION
This section describes the primary components of the secondary clarifiers that are listed below.  Center Feed Column
 Drive Unit
 Energy Dissipation Inlet (EDI)
 Feedwell
 Sludge Rake Arms
 Ducking Skimmer
 Rotating Scum Pipe
 Effluent Weir
 Launder
 Pressure Relief Valves
NOTE: The “Clarifier Mechanism” refers to the collective rotating assembly consisting of the drive unit, EDI, feedwell, sludge rake arms, and ducking skimmer.

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ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Operation and Description
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CENTER FEED COLUMN
The center feed column is a structural pipe that supports the rotating clarifier mechanism. Mixed liquor influent enters the secondary clarifier through the bottom and is discharged into the EDI through openings near the dop of the column

DRIVE UNIT
The drive unit is a large turntable-type gear unit that is powered by a constant speed motor through a speed reducer and shear pin coupling. The drive unit has a manually adjustable VFD for the motor.

The drive unit is mounted to the top of the center feed column. A center cage that is hung from the unit provides structural support for the EDI, feedwell, sludge rake arms, and ducking skimmer.

ENERGY DISSIPATION INLET (EDI)
The energy dissipation inlet (EDI) is a cylindrical drum with a sealed bottom designed to disperse high velocity mixed liquor inflow from the center feed column in a low velocity, tangential direction into the feedwell. This promotes maximum flocculation and gentle mixing without disturbing the settled solids at the floor of the clarifier basin.

FEEDWELL
The feedwell is a larger diameter circular FRP drum surrounding the center feed column and EDI. Mixed liquor swirls slowly through the feedwell and eventually exits from the open bottom into the remainder of the clarifier without disturbance or formation of velocity currents. Baffled openings located near the water surface allow scum to exit the feedwell.

SLUDGE RAKE ARMS
Clarifiers are equipped with sludge rake arms with spiral shaped blades and adjustable squeegees. The spiral blades rotate and are designed to push settled sludge to a sludge withdrawal ring located in the center of the clarifier. An effluent pipe removes collected sludge from the sludge withdrawal ring.

DUCKING SKIMMER
The ducking skimmer is a flat plate surface skimmer connected to the sludge rake arms. As the clarifier mechanism rotates, the skimmer collects floating solids and directs them into a rotating scum pipe located at the water surface. The skimmer has a hinged arm that allows it to “duck” under the rotating scum pipe during each revolution of the clarifier mechanism.

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ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Operation and Description
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ROTATING SCUM PIPE
The rotating scum pipe is a slotted pipe near the water surface that extends radially from the clarifier feedwell to the inner wall of the concrete tank. Scum is directed into the slots by the ducking skimmer.

A drive motor rotates the pipe, which allows the slots to modulate between completely unsubmerged to partially submerged depending on the amount of scum that needs to be collected.

Scum that enters the rotating pipe flows by gravity to an effluent line that discharges into the plant sewer system.

EFFLUENT WEIR
A V-notch weir is mounted around the periphery of the clarifier tank at the water surface. Incoming mixed liquor forces the clarified effluent to overtop the weir and flow into the effluent launder.

EFFLUENT LAUNDER
A rectangular cross-section concrete effluent launder is built into the inside perimeter of the concrete tank. The launder is sloped to a collection box for collection and discharge of the flow through the secondary effluent pipe.

PRESSURE RELIEF VALVES
Hydrostatic pressure relief valves in recessed pockets in the clarifier floor protect the clarifier structure from damaged caused by “floating” when the clarifier is empty and groundwater levels are high.

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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Operation and Description
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SECONDARY CLARIFIER SPECIFICATIONS
Details and specifications for the secondary clarifiers are presented in Table 7-1 and Table 7-2.

Table 7-1 Northside Secondary Clarifiers Specifications Description Specifications
Secondary Clarifier No.1, No.2, and No.3 (ME0901, ME0902, and ME0903) Diameter, ft 85
Side Water Depth, ft 12
Surface Area, ft2 5,675
Volume, ft3 68,090
Type Center Feed, Peripheral Overflow
Clarifier Drive Manufacturer, Model Westech, Model XXX
Clarifier Drive Motor Size 1 HP
Rotating Scum Pipe Manufacturer, Model Eimco, Model XXX Rotating Scum Pipe Motor Size 1 HP
Mixed Liquor Influent Pipe Diameter, in 30
Secondary Effluent Pipe Diameter, in 36
Sludge Effluent Pipe Diameter, in 14
Scum Effluent Pipe Diameter, in 4
Table 7-2 Southside Secondary Clarifiers Specifications Description Specifications
Secondary Clarifiers No.4 and No.5 (CLAR-07-01 and CLAR-07-02) Diameter, ft 110
Side Water Depth, ft 16
Surface Area, ft2 9,503
Volume, ft3 152,053
Type Center Feed, Peripheral Overflow
Clarifier Drive Manufacturer, Model WesTech, Model XXX
Clarifier Drive Motor 1 HP
Rotating Scum Pipe Manufacturer, Model Westech, Model XXX Rotating Scum Pipe Motor Size 1 HP
Mixed Liquor Influent Pipe Diameter, in 42
Secondary Effluent Pipe Diameter, in 24
Sludge Effluent Pipe Diameter, in 16
Scum Effluent Pipe Diameter, in 4
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ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Operation and Description
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POWER DISTRIBUTION
Secondary clarifier drive unit motors and rotating scum pipe motors receive 480-volt, 3-phase power from a motor control center (MCC). The MCC receives emergency power from an automatic transfer switch (ATS) located in a distribution switchboard (DSB).

Lighting and receptacles located at each secondary clarifier receive 120-volt, 1- phase power from a panel located in an MCC. The power for the panel is supplied through a step-down transformer (e.g. 480-volts to 120-volts) in the MCC.

Table 7-3 and Table 7-4 present power distribution information for clarifier motors and lighting.

Table 7-3 Northside Facility Power Distribution Information Parameter Value
Secondary Clarifier No.1, No.2, and No.3 (ME0901, ME0902, and ME0903) Motors (Drive Unit and Rotating Scum Pipe)
Power Supply 480-Volt, 3-Phase
MCC Name MCC-F
MCC Location RAS/WAS Building
ATS Name ATS-12-01
DSB Name DSB-12-01
ATS/DSB Location Administration/Laboratory Building
Lighting
Power Supply 120-Volt, 1-Phase
Panel Name LPF
MCC Name MCC-F
MCC Location
SAMPLE
RAS/WAS Building
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ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Operation and Description
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Manteca WQCF O&M Manual
Table 7-4 Southside Facility Power Distribution Information Parameter Value
Secondary Clarifiers No.4 and No.5 (CLAR-07-01 and CLAR-07-02) Motors (Drive Unit and Rotating Scum Pipe)
Power Supply 480-Volt, 3-Phase
MCC Name MCC-07-01
MCC Location Southside MCC/Generator Building
ATS Name ATS-06-01
DSB Name DSBE-06-01
ATS/DSB Location Southside MCC/Generator Building
Lighting
Power Supply 120-Volt, 1-Phase
Panel Name DPNL-06-01
MCC Name MCC-06-01
MCC Location Southside MCC/Generator Building

OPERATIONAL PARAMETERS
Performance of the secondary clarifiers can be affected by monitoring and/or adjusting the following parameters:

1. Hydraulic Retention Time (HRT)

2. Solids Loading Rate (SLR)

3. Surface Overflow Rate (SOR)
These parameters are affected by the influent mixed liquor flow rate and RAS/WAS flow rates. Refer to Chapter 8 – RAS/WAS Pump Stations and Chapter 9 – Secondary Process Control for a complete discussion on the amount of sludge to be returned or wasted and for applicable calculation sheets for the determination of RAS and WAS flow.

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Chapter 7: Secondary Clarifiers
Operation and Description
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Hydraulic Retention Time (HRT)
The hydraulic retention time (HRT) represents the time a particle remains in the clarifier and is typically measured in hours. Excessive retention times can lead to septic conditions for the settled sludge.

HRT is a function of clarifier volume and influent flow rate, and is calculated using the following formula:

HRT (hrs) = [A (ft2) x D (ft) x 7.48 (gal/ft3)] x [Units] x [24 (hrs/day)] [QML (gal/day)]

where:

A = Clarifier Surface Area (ft2)
D = Sidewater Depth (ft)
Units = Number of Clarifier Units in Operation (-)
QML = Influent Mixed Liquor Flow Rate (gal/day)
Because the secondary clarifiers at the Northside and Southside Facilities have different dimensions, their HRTs need to be calculated and evaluated independently.

The following presents an example calculation for the HRT at the Northside Facility when the influent flow is 4.785 mgd (9.75 mgd peak flow split evenly between the Northside and Southside Facilities) and all three Northside Facility clarifiers are operating.

HRT = [5,675 ft2 x 12 ft x 7.48 gal/ft3] x [3 Units] x [24 hrs/day] [4,785,000 gal/day]

HRT = 7.7 hours
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Chapter 7: Secondary Clarifiers
Operation and Description
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Solids Loading Rate (SLR)
The solids loading rate (SLR) is a function of the mass of solids entering the clarifier and the clarifier surface area, and is calculated using the following formula:

SLR (lb/ft2 /day) = [Q (mgd) + QRAS (mgd)] x [MLSS (mg/L)] x [8.34 (lb/gal)] [A (ft2)] x [Units]

where:

Qi = Influent Mixed Liquor Flow Rate (mgd)
QRAS = RAS Flow Rate (mgd)
MLSS = Mixed Liquor Suspended Solids Concentration (mg/L) A = Clarifier Surface Area (ft2)
Units = Number of Clarifier Units in Operation (-)
Because the secondary clarifiers at the Northside and Southside Facilities have different dimensions, their SLRs need to be calculated and evaluated independently.

The following presents an example calculation for the SLR at the Northside Facility when the influent flow is 4.785 mgd (9.75 mgd peak flow split evenly between the Northside and Southside Facilities), a RAS flow rate is 50% of influent flow, MLSS concentration is 3000 mg/L, and all three Northside Facility clarifiers are operating.

SLR = [4.875 mgd + 2.3925 mgd] x [3,000 mg/L] x [8.34 (lb/gal)] [5,675 ft2] x [3 Units]

SLR = 10.5 lb/ft2 – day
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ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Operation and Description
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Surface Overflow Rate (SOR)
The surface overflow rate (SOR) is a function of the clarifier effluent flow rate and the clarifier surface area, and is calculated using the following formula:

SOR (gal/ft2 - day) = [QE (gal/day)
[A (ft2)] x [Units]

where:

QE = Clarifier Effluent Flow Rate (gal/day)
A = Clarifier Surface Area (ft2)
Units = Number of Clarifier Units in Operation (-)
Because the secondary clarifiers at the Northside and Southside Facilities have different dimensions, their SORs need to be calculated and evaluated independently. The following presents an example calculation for the SOR at the Northside Facility when the influent flow is 4.785 mgd (9.57 mgd peak flow split evenly between the Northside and Southside Facilities) and all three Northside Facility clarifiers are operating.

SOR = [4,785,000 gal/day]
[5,675 ft2] x [3 Units]

SOR = 281 gal/ft2 - day
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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Operation and Description
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DESIGN CRITERIA
The design for secondary clarifiers is typically based on hydraulic overflow rates and solids loading rates. Recommended and design overflow rates and solids loading rates for the secondary clarifiers are presented in Table 7-5 and Table 7-6.

Table 7-5 Northside Secondary Clarifiers Design Criteria Condition Surface Overflow
Rate (gal/ft2-day)
Solids Loading
Rate (lb/ft2-day)a
Secondary Clarifier No.1, No.2, and No.3 (ME0901, ME0902, and ME0903) Average Flow (4.94 mgd)
Recommended value 400 to 600 14 to 24
Design value with one unit out of service 435 17
Peak Flow (9.57 mgd)
Recommended value 800 to 1,000 38
Design value 560 22
Design value with one unit out of service 840 31
Table 7-6 Southside Secondary Clarifiers Design Criteria Condition Surface Overflow
Rate (gal/ft2-day)
Solids Loading
Rate (lb/ft2-day)a
Secondary Clarifiers No.4 and No.5 (CLAR-07-01 and CLAR-07-02) Average Flow (4.94 mgd)
Recommended value 400 to 600 14 to 24
Design value with one unit out of service 520 17
Peak Flow (9.57 mgd)
Recommended value 800 to 1,000 38
Design value 505 19
Design value with one unit out of service 1,010 38
The solids loading rates presented in these tables assume an MLSS concentration of 3,000 mg/L and a recycle ratio of 50% of influent flow. Refer to Chapter 9 – Secondary Process Control for additional information on MLSS and recycle ratio.

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ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Operation and Description
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OPERATIONAL CONSIDERATIONS AND PROCESS CONTROL
The Operator should control the RAS flow rate to maintain a sludge blanket at an average depth of 1 to 2 feet to prevent anaerobic conditions. Refer to Chapter 9 – Secondary Process Control for details on controlling the RAS flow rate.

The sludge blanket is monitored using a “Sludge Judge” by doing the following:

1. Slowly lower the Sludge Judge to the bottom of the clarifier tank. The float valve opens, allowing liquid to enter the column.

2. When the Sludge Judge touches the bottom and the column has been filled to the surface level, tug slightly on the rope as the unit is raised. This sets the check valve, trapping the liquid inside.

3. After the unit has been raised clear of clarifier water surface, the amount of solids in the sample can be read using the 1-foot (0.31-meter) increments marked on the column sections.

4. To release the material in the unit, touch the pin extending from the bottom section against a hard surface. This opens the check valve to drain the sample.

IMPORTANT: Measure the sludge blanket depth at approximately the same time each shift to account for daily variations in influent flow rate. The sludge blanket depth will change as the influent flow rate changes.

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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Controls and Instrumentation
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Manteca WWTP O&M Manual

CONTROLS AND INSTRUMENTATION
This section describes the general configuration and logic for secondary clarifier power, mechanical controls, and instrumentation. Refer to the drawings and literature furnished by equipment manufacturers for additional details.

CLARIFIER DRIVE CONTROL DESCRIPTION
Controls for each clarifier drive unit are identical. Operation of the drive unit is done manually by local control panels (LCPs) located adjacent to the drive unit motor (at the end of the clarifier bridge). There is no automatic or remote control functionality.

A clarifier runs continuously if turned on. The MCC serves as the main disconnect for power to the drive unit, but the clarifier cannot be started from the MCC or SCADA.

Each clarifier includes a torque-control system that protects the clarifier drive mechanism from an overload condition, such as an excessive amount of solids or debris in the tank. If a HIGH TORQUE condition (100% torque) is detected, an operator alarm is triggered. At a preset TORQUE OVERLOAD (120%), an interlock shuts down the drive unit to prevent damage.

Table 7-7 presents a summary of clarifier drive unit controls. Additional discussion is provided below.

Table 7-7 Clarifier Drive Unit Control Summary
Facility Location Control/Action
Northside
Secondary Clarifier No. 1 Drive Unit

LCP (XXXX)
Secondary Clarifier No. 2 Drive Unit

LCP (XXXX)
Secondary Clarifier No. 3 Drive Unit

LCP (XXXX)
START pushbutton
LOCKOUT-STOP pushbutton
RAS/WAS Building (MCC-07-01) Main disconnect
Southside
Secondary Clarifier No. 4 LCP (XXXX)
Secondary Clarifier No. 5 LCP (XXXX)
START pushbutton
LOCKOUT-STOP pushbutton
Southside MCC/Generator Building
(MCC-06-01) Main Disconnect
IMPORTANT: Do not start the drive with an excessive amount of solids in the tank. Do not attempt to continue running when a high-torque condition is detected: find the trouble and correct it. Do not operate if ice forms or builds-up on inside of tank wall.

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Chapter 7: Secondary Clarifiers
Controls and Instrumentation
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Clarifier Drive Control Narrative

1. When the START pushbutton is pressed, the clarifier runs continuously unless there is a TORQUE OVERLOAD (120% torque) condition. A HIGH TORQUE (100% torque) condition does not stop the clarifier.

2. When the LOCKOUT-STOP pushbutton is pressed, the clarifier stops.

CLARIFIER DRIVE STATUS AND ALARMS
The status and alarms for the secondary clarifiers is provided in the following table.

Table 7-8 Clarifier Drive Unit Status and Alarm Summary Facility Sensor Indication/Alarm
Northside
Secondary Clarifier No. 1 High Torque (XXXX)
Secondary Clarifier No. 2 High Torque (XXXX)
Secondary Clarifier No. 3 High Torque (XXXX)
SCADA alarm/display
Southside Secondary Clarifier No. 4 High Torque (XXXX)
Secondary Clarifier No. 5 High Torque (XXXX) SCADA alarm/display

ROTATING SCUM PIPE
Table 7-9 presents a summary of rotating scum pipe controls. Additional discussion is provided below.

Table 7-9 Rotating Scum Pipe Control Summary
Facility Location Control/Action
Northside
Secondary Clarifier No. 1 Rotating
Scum Pipe LCP (XXXX)
Secondary Clarifier No. 2 Rotating
Scum Pipe LCP (XXXX)
Secondary Clarifier No. 3 Rotating
Scum Pipe LCP (XXXX)
HOA switch
Timer
LOW, MIDDLE, HIGH switches
LOWER and RAISE pushbuttons
STOP pushbutton
COUNT RESET pushbutton
ON/OFF switch
RAS/WAS Building (MCC-07-01) Main disconnect
Southside
Secondary Clarifier No. 4 Rotating
Scum Pipe LCP (XXXX)
Secondary Clarifier No. 5 Rotating
Scum Pipe LCP (XXXX)
HOA switch
Timer
LOW, MIDDLE, HIGH switches
LOWER and RAISE pushbuttons
STOP pushbutton
COUNT RESET pushbutton
ON/OFF switch
Southside MCC/Generator Building
(MCC-06-01) Main Disconnect
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ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Controls and Instrumentation
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Rotating Scum Pipe Control Description
Controls for each rotating scum pipe are identical. Operation of the unit is done manually by local control panels (LCPs) located near the rotating scum pipe motor.

There is no remote control functionality. The MCC serves as the main disconnect for power to the rotating scum pipe, but the unit cannot be started from the MCC or SCADA.

At the Northside Facility, the LCPs are located on the side of the clarifier tank under the clarifier walkway. At the Southside Facility, the LCPs are located along the clarifier walkway. Figure 7-7 and Figure 7-8 present typical rotating scum pipe LCP configurations for the Northside and Southside Facilities.

Figure 7-6 Northside Facility Secondary Clarifier Rotating Scum Pipe LCP

Figure 7-7 Southside Facility Secondary Clarifier Rotating Scum Pipe LCP SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

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ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Controls and Instrumentation
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Rotating Scum Pipe Control Narrative

1. When the ON/OFF switch is ON, the panel receives power and the system runs as summarized below. When the ON/OFF switch is OFF, the panel does not receive power and the system does not run.

2. When the HOA switch is set to HAND, the LOWER and RAISE pushbuttons are used to rotate the scum pipe to a desired setting.

3. When the HOA switch is set to OFF, the scum pipe does not rotate.

4. When the HOA switch is set to AUTO, the scum pipe rotates automatically on a cycle based on the timer setting. The LOW, MIDDLE, HIGH switch is used to select how much the scum pipe rotates in each cycle. Pressing the STOP pushbutton stops the system.

5. Pressing the COUNT RESET pushbutton resets the cycle count to zero.

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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Monitoring and Maintenance
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MONITORING AND MAINTENANCE
The following sections contain step-by-step procedures for operation and maintenance of the secondary clarifiers.

IMPORTANT: Before attempting to operate the equipment in any mode, the operator should be thoroughly familiar with the purpose and descriptions of the process components, with control and instrumentation functionality, with all pertinent safety considerations, and with the respective equipment manufacturer’s operation and maintenance instructions.

For detailed instructions on procedures, repairs, or parts lists associated with operation and recommended maintenance items, refer to the manufacturer’s Operations and Maintenance manual.

SAFETY
The following are some of the fundamental safety precautions that should be observed when operating or maintaining the secondary clarifiers. As part of the plant’s safety program, the operators should develop a comprehensive list of safety procedures for the process based on appropriate reference materials and their own experience.

1. Be sure that all gratings, safety shields, or other guards are properly installed.

2. Position all local and motor starter control switches to OFF or STOP and perform proper lockout/tagout procedures when working on equipment.

3. Keep all water hoses and power cords rolled up and properly stored.

4. Anyone entering the area should be wearing adequate PPE for the work being performed. This includes, but is not limited, items such as safety glasses, safety shoes, or hard hats.

5. Locate “WARNING” signs to alert people of moving parts. Keep hands, clothing, and other items that may snag away from all moving parts.

6. Keep all flammable or explosive materials away from the equipment area at all times.

7. Report all potential safety hazards to the Operations Supervisor.

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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Monitoring and Maintenance
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Manteca WQCF O&M Manual

ROUTINE OPERATIONS
Table 7-10 presents recommended routine operation tasks and intervals.

Table 7-10 Clarifier Routine Operation Tasks
Interval Task
Daily 1. Check sludge blanket depths twice per day and record results on daily round sheet. Refer to “Process Control” section.

2. Perform secchi disc readings and record results in MSO (day shift only).

3. Check clarifier mechanism and rotating scum pipe for proper operation.

4. Spray down foam, as necessary.

5. Check automatic sampler for proper operation.

6. Keep the area clean and free from trash and debris.

7. Keep the cooling surfaces of electric motors clean.

8. Replace burned-out light bulbs or status lights.

9. Keep all gratings, access covers, and safety shields in place.

Weekly 1. Spray down effluent launder

2. Grease the main gear and bearing. Use recommended
lubricants.

3. Apply spray oil to torque box plunger (or as required).

4. Examine all wearing parts of clarifier mechanism for excessive wear.

5. Test limit switches on the torque control system of the clarifier mechanism.

6. Check that all bolts and nuts are tight, and that original alignments and adjustments are maintained.

Monthly 1. Grease Cyclo reducer, upper bearing, and lower bearing in clarifier mechanism. Use recommended lubricants.

2. Check the torque overload alarm.

3. Drain water trap.

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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Monitoring and Maintenance
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PREVENTATIVE MAINTENANCE
Secondary clarifiers require a certain amount of preventative maintenance. Table 7- 11 presents a quick-reference summary of recommended preventative maintenance intervals and maintenance items taken from the manufacturer’s O&M manual.

IMPORTANT: For detailed instructions on procedures, repairs, or parts lists associated with recommended maintenance items, refer to the manufacturer’s Operations and Maintenance manual.

Table 7-11 Clarifier Preventative Maintenance Schedules Maintenance
Interval
Recommended Inspection or Maintenance
Daily 1. Oil torque box plunger.

2. Check oil level in drive gear reducer.

3. Inspect and test torque box limit switches.

4. Clean motor vents and area around motor and drive.

5. Check for algae growth in the launders and wash as needed to remove buildup on launder walls and floor.

6. Check for grease and scum buildup in the clarifier and spray towards rotating scum pipe, as needed.

Monthly 1. Check for any loose fasteners or hardware.

2. Check drives for noise, unusual vibration or wear, and condensation. Drain-off any condensation and refill oil.

Quarterly 1. Check all mounting hardware.

2. Check all weirs and baffle piece hardware.

Yearly 1. Drain tank and perform a complete wash down.

2. Check all fasteners between the rake arms and cage.

3. Remove rust, or badly corroded steel members. Paint as required.

4. Check the squeegees for wear and damage.

5. Change oil in main drive unit and refill.

6. Inspect gears and bearings for wear if teardown is indicated.

7. Inspect condition of scum box connectors.

8. Grease motor bearings.

9. Check coating on clarifier mechanism and re-coat as
necessary.

As Required 1. Perform maintenance per equipment Manufacturer’s O&M Manual.

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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Shutdown/Startup Procedure
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Manteca WWTP O&M Manual

STARTUP/SHUTDOWN PROCEDURES
Secondary clarifiers may be added or removed from service to accommodate influent flow variations or required maintenance. However, certain steps must be taken to ensure proper operation of upstream and downstream processes. The following sections outline general startup and shutdown procedures but should not preclude using common sense or knowledge gained through experience.

IMPORTANT: ALWAYS lock-out and tag-out equipment before performing maintenance or repairs.

GENERAL PROCEDURES
The following procedures provide general guidance for startup or shutdown of a secondary clarifier:

1. Be alert and check for general safety hazards that could cause bodily injury or equipment damage as a result of performing process modifications.

Undertake any required corrective action before proceeding with work.

2. Determine how the startup or shutdown of a secondary clarifier will affect other parts of the process and any other process.

3. Prepare the equipment for startup according to instructions in the manufacturer’s O&M manuals.

PRE-STARTUP PROCEDURES
Pre-startup procedures for bringing a clarifier online are summarized below. However, operator experience and knowledge of the equipment being placed into service should prevail over these steps.

1. Check to ensure that all field and panel switches connected with the unit and its associated equipment are initially in the OFF position.

2. Check that mechanical equipment is properly lubricated and ready for operation. Refer to the manufacturer’s O&M manual.

3. Check drive alignment and belt tension.

4. Check 3-phase motors for proper rotation. If reverse operation can damage the unit, disconnect the drive linkage before bumping the motor.

5. Supply power to the MCC. See the “Operation and Description” section for location of the MCC and DSB for the Northside and Southside Facilities.

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a. At the MCC DSB, close the main breaker to the MSB.
b. At the MSB, close the MCC feeder breaker.
c. At the MCC, position the main breaker to ON.

STARTUP PROCEDURES
Startup procedures for bringing a clarifier online are summarized below.

1. Inspect the tank and mechanism path for any obstructions and close the clarifier drain valve.

2. Before allowing wastewater into the clarifier, start the drive unit and rotating weir pipe using the START pushbuttons at each respective LCP while the tank is still empty. Operate for several revolutions and monitor carefully for correct rotation and possible interferences.

3. Check the torque box alarm and shutdown settings for correct operation by pushing the hand plunger on the torque box. An alarm should occur at the HIGH TORQUE condition followed by a mechanism shutdown at the TORQUE OVERLOAD condition. Refer to the “Operation and Description” section for torque settings.

4. After the TORQUE OVERLOAD shutdown, press the RESET pushbutton on the drive mechanism LCP to restart the drive. The mechanism should not restart until this pushbutton is pressed. If the unit does not operate at the given settings, check the field wiring for correct installation.

5. Enable SCADA alarms associated with the clarifier.

IMPORTANT: Filling a secondary clarifier with secondary effluent may affect FFPS or irrigation flows. Check with the operator of the day before starting to fill the clarifier

6. Begin filling the secondary clarifier that is being placed online by closing the secondary effluent diversion gate and installing slide gates in the irrigation structure to back up secondary effluent.

IMPORTANT: While filling the clarifier, it is important to watch the water level in the feedwell carefully. To prevent the feedwell drum from bending, limit the fill rate, which may be achieved during low flow periods or by limiting the RAS flow rate. While the clarifier is filling, if the water level in the drum gets above half full, reduce the fill rate until the water level inside the feedwell recedes. Once the water level inside the clarifier reaches the bottom of the feedwell, it is safe to send water at design flow rates. Always follow manufacturer’s latest O&M procedures for startup requirements.

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ATTACHMENT 2
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Monitoring and Maintenance
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7. When the water in the secondary clarifier that is being placed online is approximately one foot from the effluent weir, reverse the actions taken in Step 5.

6. Direct flow from the aeration basins to the secondary clarifier by manually opening the appropriate isolation valve or gate:
a. Secondary Clarifier No. 1 – Open Valve XXX located near the Aeration Basin 1-5 effluent channel.
b. Secondary Clarifier No. 2 – Open Stop Gates STP-05-01 and -02 located in the Aeration Basin 1-5 effluent channel.
c. Secondary Clarifier No. 3 - Open Valve XXX located near the Aeration Basin 1-5 effluent channel.
d. Secondary Clarifier No. 4 – Open Gate (WIRG-07-01) located in the Southside Secondary Clarifiers Splitter Box.
e. Secondary Clarifier No. 5 – Open Gate (WIRG-07-02) located in the Southside Secondary Clarifiers Splitter Box.

7. Start the RAS pump for the secondary clarifier being brough online in MANUAL mode to verify they are operational and then place all switches in AUTO mode.

Check the RAS flow rate and adjust as needed. Reference Chapter 8 – RAS/WAS Pump Station for procedures on RAS pump startup.

IMPORTANT: Remember, proper start-up and operation depends on one major rule:
withdraw solids at the same rate that they are fed into the tank because clarifiers are not designed to store solids.

8. Monitor the development of the sludge blanket. As the solids start to settle, the underflow concentration will begin to increase. At this time, the sludge blanket should start to develop and then rise.

9. For reasonable clarifier performance, the sludge blanket should be 1 to 2 feet deep. Refer to the “Operational Procedures” section for instruction on monitoring the sludge blanket using a Sludge Judge.

10. If the blanket does not develop within a few hours, the underflow withdrawal rate (RAS pumping) is probably too high. Slow down the sludge withdrawal until the blanket starts to appear.

11. If the sludge blanket appears, but the depth continues to increase, then the sludge withdrawal rate must also be increased until a steady state is achieved.

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ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Monitoring and Maintenance
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12. At this steady state, the underflow solids mass should be equivalent to the incoming solids mass. If the sludge blanket continues to rise even at maximum sludge withdrawal rates, then the influent feed rate must be decreased (by putting more clarifiers online). Generally, clarifiers are conservatively designed, making this case unlikely.

Refer to Chapter 9 – Secondary Process Control for additional details on maintaining optimal clarifier performance.

SHUTDOWN PROCEDURES
Shutdown procedures for bringing a clarifier online are summarized below. Two different shutdown procedures are discussed: (1) shutdown without draining, and (2) shutdown with draining.

NOTE: Shutting down all secondary clarifiers at either the Northside or Southside Facility requires all flow to be diverted to the other Facility for treatment. This should only be attempted if absolutely required. When shutting down one or multiple clarifiers at a plant, careful consideration should be taken for appropriate plant flow splitting and mixed liquor transferring. Refer to Chapter 9 – Secondary Process Control for more information.

Shutdown Without Draining – Normally, routine preventative maintenance can be performed without draining the clarifier. In most cases, the drive unit can be left running. However, if power to the drive unit must be shut off, the mechanism should not be stopped for more than 30 minutes.

1. Stop flow from the aeration basins to the secondary clarifier by manually closing the appropriate isolation valve or gate:
a. Secondary Clarifier No. 1 – Close Valve XXX located near the Aeration Basin 1-5 effluent channel.
b. Secondary Clarifier No. 2 – Close Stop Gates STP-05-01 and -02 located in the Aeration Basin 1-5 effluent channel.
c. Secondary Clarifier No. 3 – Close Valve XXX located near the Aeration Basin 1-5 effluent channel.
d. Secondary Clarifier No. 4 – Close Gate (WIRG-07-01) located in the Southside Secondary Clarifiers Splitter Box.
e. Secondary Clarifier No. 5 – Close Gate (WIRG-07-02) located in the Southside Secondary Clarifiers Splitter Box.

SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX E
ATTACHMENT 2
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Monitoring and Maintenance
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2. Stop the drive unit by pressing the LOCKOUT-STOP pushbutton at the drive unit LCP. Stop the rotating weir pipe by placing the HOA switch at the LCP to OFF.

3. Disconnect power to the MCC. See the “Operation and Description” section for location of the MCC and DSB for the Northside and Southside Facilities. a. At the MCC, position the main breaker to OFF.
b. At the MSB, open the MCC feeder breaker.
c. At the MCC DSB, open the main breaker to the MSB.

4. Reverse Step 1 through Step 3 to place the clarifier back into service. Executing the comprehensive startup procedure is not necessary when performing a shutdown without draining.

Shutdown with Draining – This gives facility personnel an opportunity to inspect all parts of the mechanism, perform adjustments and maintenance to submerged components, touch-up paint, and remove uncollected solids in the tank.

CAUTION: If a small amount of liquid is allowed to remain in the tank, it may cover drains in the clarifier floor. Personnel working in the tank should be very careful to first locate and mark drains to avoid injury from accidentally falling or stepping in them.

Personnel working in the tank should follow approved Confined Space Entry procedures.

1. Stop flow from the aeration basins to the secondary clarifier by manually closing the appropriate isolation valve or gate:
a. Secondary Clarifier No. 1 – Close Valve XXX located near the Aeration Basin 1-5 effluent channel.
b. Secondary Clarifier No. 2 – Close Stop Gates STP-05-01 and -02 located in the Aeration Basin 1-5 effluent channel.
c. Secondary Clarifier No. 3 - Close Valve XXX located near the Aeration Basin 1-5 effluent channel.
d. Secondary Clarifier No. 4 – Close Gate (WIRG-07-01) located in the Southside Secondary Clarifiers Splitter Box.
e. Secondary Clarifier No. 5 – Close Gate (WIRG-07-02) located in the Southside Secondary Clarifiers Splitter Box.

2. Before proceeding with draining the secondary clarifiers, the groundwater table must be checked and dewatering accomplished as necessary to lower the groundwater elevation below the lowest point of the clarifier’s foundation. If tanks SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Monitoring and Maintenance
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are emptied without the groundwater being lowered, cracking of the existing slab is possible. Dewatering should be continued as required to keep the groundwater at a safe level the entire time that the clarifier is empty.

3. Place the associated RAS pump for the secondary clarifier that is being removed from service in MANUAL and continue to pump the sludge out of the secondary clarifier. Refer to Chapter 8 – RAS/WAS Pump Station related to operation of the RAS pumps.

4. When the water level in the clarifier is approximately three feet below the effluent weirs, stop the clarifier drive unit by pressing the LOCKOUT-STOP pushbutton at the LCP and stop the rotating weir pipe by placing the HOA switch to OFF at the LCP.

5. Disconnect power to the MCC. See the “Operation and Description” section for location of the MCC and DSB for the Northside and Southside Facilities. a. At the MCC, position the main breaker to OFF.
b. At the MSB, open the MCC feeder breaker.
c. At the MCC DSB, open the main breaker to the MSB.

6. When the secondary clarifier is nearly empty, place the associated CAS pump for the secondary clarifier that is being removed from service in OFF. Refer to Chapter 8 – RAS/WAS Pump Station for details related to operation and shutdown of the RAS pumps.

7. Open the clarifier drain valve and use a high-pressure hose to wash any remaining sludge from the tank and mechanism into the drain.

8. Perform equipment maintenance and return to service as soon as possible.

SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Potential Problems and Troubleshooting
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Manteca WWTP O&M Manual

POTENTIAL PROBLEMS AND TROUBLESHOOTING

PROCESS TROUBLESHOOTING
Refer to the troubleshooting guide in Chapter 9 – Secondary Process Control to address abnormal process operation associated with the secondary clarifiers such as bulking, rising, or floating sludge.

MECHANICAL TROUBLESHOOTING
Basic mechanical faults can typically be isolated, verified and corrected using common sense and a few basic procedures. The following table provides a list of potential problems, possible causes, and remedies to expedite any troubleshooting process.

Table 7-12 Troubleshooting Guide
Symptom Possible Cause Remedy
1) Overload
alarm sounds
or the drive
motor stops
1a) Excessive accumulation of solids in the
bottom of the tank resulting from
sludge being discharged at an
average rate less than the rate of
introduction of solids with the feed.
 Adjust rate of feed introduction.
 Immediately bypass the feed and open
the underflow line to eliminate the
accumulation of solids.
 Allow the mechanism to continue to
operate, if possible. If the overload is so
heavy that the cutout switch continues to
stop the drive, it will be necessary to drain
the tank and manually remove the solids.
1b) Interference with rake arm operation
may also be caused by a foreign
object (e.g. rocks, tools, etc.) being
dropped into the tank.
 Stop the mechanism and see if the object
can be removed. This may require use of
grappling hooks to "fish” the object out.
 If not successful within a short time, it will
be necessary to cut off the influent to
prevent too great an accumulation of
sludge.
 If the object cannot be removed with the
tank filled, it will be necessary to drain the
tank and remove it before operating the
mechanism.
 Check the rake arms for any damage or
deformation before resuming operations.
1c) A rake arm may be dragging on the
bottom of the tank. The arm could be
out of alignment or be subject to
structure failure.

The tank must be drained and the arm
adjusted or repaired.
1d) A skimmer arm may be dragging on
the tank wall
The arm must be adjusted to allow
unrestricted movement.

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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Potential Problems and Troubleshooting
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Manteca WQCF O&M Manual
Table 7-12 Troubleshooting Guide (Continued)
Symptom Possible Cause Remedy
2) Underflow
lines
becomes
plugged
2a) Too thick underflow. To clear the line, back flush with high-pressure water until the line is cleared.
2b) Foreign object in the line causing
plugging.
 Stop the mechanism and see if the object
can be removed. (This may have to be
done by means of grappling hooks or
"fishing the object out").
 If not successful within a short time, it will
be necessary to cut off the influent to
prevent too great an accumulation of
sludge.
 If the object cannot be removed with the
tank filled, it will be necessary to drain the
tank and remove it before operating the
mechanism.
 Check the rake arms for any damage or
deformation before resuming operations.
 Source of trouble must be located and
corrected before restarting mechanism.
3) Motor not
rotating
3a) Terminal wires are loose.
3b) Fuses have been blown
3c) Circuit breakers have tripped
3d) Burnt windings due to prolonged
overload.
3e) Excessive cold temperatures causing
lubricants to flow poorly.
3a) Check connections.
3b) Determine cause of overload and
replace fuses.
3c) Reset and check running amps.
3d) Check all that apply; remove cause and
replace motor.
3e) Provide temporary heat. Change to
lower viscosity lubricants, or make sure to
run continuously.
4) Motor
overheating
4a) Motor is overloaded
4b) Motor operating at wrong voltage
4a) Determine overload cause and remove.
4b) Check supply voltage and correct as
needed.
5) Motor
excessive
noise
5a) Coupling misaligned
5b) Coupling halves too close
5c) Worn bearings
5d) Broken fan
5e) Bent fan cover
5f) Loose fasteners
5a) Align coupling
5b) Correct gap per specifications
5c) Replace worn bearings
5d) Replace fan
5e) Repair or replace fan
5f) Tighten fasteners
6) Mechanism
not turning
6a) Shear pin broken (if provided)
6b) Coupling between motor and reducer
broken.
6c) Sheared or slipped key between drive
train components.
6a) Replace broken shear pin
6b) Replace broken couplings
6c) Replace sheared key
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APPENDIX E
ATTACHMENT 2
Chapter 7: Secondary Clarifiers
Potential Problems and Troubleshooting
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Table 7-12 Troubleshooting Guide (Continued)
Symptom Possible Cause Remedy
7) Torque
control
device not
operating
correctly
7a) Check adjustment of cams
7b) Check for bent, broken or bound-up
parts.
7c) Zeroing screw not set properly
7d) Torque Arm retaining screw bent or
broken.
7a) Contact the manufacturer for
assistance.
7b) Replace bent or broken parts
7c) Set zeroing screw properly per drawing.
7d) Remove or replace torque arm
8) Reducer or
drive running
with
excessive
noise or
vibration
8a) Lack of lubrication
8b) Loose fasteners
8c) Loose coupling
8a) Check and add grease/oil as required.
8b) Tighten fasteners
8c) Tighten coupling
9) Reducer
overheating
9a) Reducer is overloaded
9b) Incorrect lubricant or quantity
9a) Determine cause of overload
9b) Check for proper lubricant and level
10) Lubricant
leakage
from reducer
10a) Seal or shaft worn out
10b) Excessive lubricant
10c) Water contamination
10d) Loose reducer fasteners
10a) Repair or replace seal and shaft
10b) Reduce frequency of re-lubrication
10c) Find water contamination source and
correct it.
10d) Tighten fasteners
11) Main gear/
main
bearing
noise
Lack of lubricant Check gear teeth and add grease/oil as required.

SAMPLE RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX E
ATTACHMENT 2
Revision Description Date By

4.0 Modified Assets 8/8/2019 Public Works, Thomas Mannor

4.1 Modified Assets 11/4/2019 Public Works, Richard Ngo

4.2 Modified Assets 7/13/2020 Public Works, Thomas Mannor

4.3 Modified Assets 9/29/2021 Public Works, Thomas Mannor

4.4 Modified Assets 8/18/2022 Public Works, Thomas Mannor

NAMING STANDARDS AND

ASSET HIERARCHY
City of Manteca
Abstract
The objective of this document is to describe the City of Manteca equipment naming conventions for all of the equipment located at the Wastewater Quality Control Facility (WQCF), Water, Waste/Stormwater Collection, and for the Supervisory Control and Data Acquisition (SCADA) system. Updates to the standard are anticipated with most new Capital Improvement Projects (CIP) as new locations and equipment are added.

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APPENDIX F
ATTACHMENT 2
1 Naming Standards and Asset Hierarchy

1.1 Objective
The objective of this document is to describe the City of Manteca equipment naming conventions for all of the equipment located at the Wastewater Quality Control Facility (WQCF), Water, Waste/Stormwater Collection, and for the Supervisory Control and Data Acquisition (SCADA) system. The naming conventions shall be utilized for all upcoming project design drawings, SCADA, Piping and Instrumentation Diagrams (P&ID), Loop Diagrams and other documents used to identify equipment.

This standard is intended to be a living document. Updates to the standard are anticipated with most new Capital Improvement Projects (CIP) as new locations and equipment are added. This standard does not apply to instruments associated with fire alarm, security, and information technology systems, unless these systems are interfacing with the PLC or SCADA systems.

The location hierarchy for the WQCF, Water, and Waste/Stormwater Collection is shown on Figure 1 and Figure

2. This location hierarchy will be used for segments 1 and 2 of the standard equipment naming convention shown in Figure 3.

1.2 Engineering Submittals and Equipment Tags
All design drawings, including SCADA submittals shall follow the instructions listed in Table 1 for each submittal type.

Table 1 – Submittal Details
Submittal Type
(Format) Description Reference
Asset Database (Excel
2010 or comma delimited
file)
In addition to Design Drawings, the engineer shall submit an asset database listing all of the equipment/instruments included in the Design Drawings.

The City of Manteca will
provide Excel spreadsheet
template.

Design Drawings The Design Drawings shall only utilize segments 3 to 6 of the equipment naming convention identified in this document (see Figure 3). Tag numbers for instruments identified in P&IDs shall follow the instrumentation tag naming
convention identified in Figure 4.

Refer to Figure 3 and Figure

4. SCADA The Design Drawings shall only utilize segments 3 to 6 of the equipment naming convention identified in this document (see Figure 2).

Refer to Figure 3.

Equipment Name Plates The physical name plates for equipment shall only include equipment naming segments 3 to 6. The equipment name
plate shall be made of stainless steel. Fontshall be engraved or stamped on the name plate and shall be at minimum 16- point, Arial font.

Refer to Figure 3.

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APPENDIX F
ATTACHMENT 2
Figure 1 – Utilities Location Hierarchy

Public Works
Sewer
WQCF
Headworks
01 Primary Treatment
02 Biological Treatment
03 Secondary Treatment
04 Tertiary Treatment
05 Disinfection
06 Solids Treatment
07 Emergency Ponds
08 River Outfall
09 Recycled Water
10 Laboratory
11 Plant Water System
12 Power
13 Irrigation
14 Computer System
15 Wastewater
Collection
Wastewater Station
Storm
Stormwater
Collection
Stormwater
Station
Water
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APPENDIX F
ATTACHMENT 2
Figure 2 – Utilities Location Hierarchy
Public Works
Sewer
Storm
Water
Water Production
Water Distribution
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APPENDIX F
ATTACHMENT 2

1.3 Description of Standard
The naming standard for the WQCF, Water, and Waste/Stormwater Collection systems are detailed in this section. The equipment naming standard is segmented into six fields with a maximum of four characters per segment as shown in Figure 3. The naming standard will apply to facility equipment, process control, SCADA, and field instrumentation. There are some exceptions to the number of segments required, please refer to Table 1 at the beginning of this document.

Figure 3 – Naming Standard
AAAA - BBBB - CCCC - EEEE – FF - GGG
① ② ③ ④ ⑤ ⑥
Segment Key
① Facility Location ④ Asset Type
② System Location ⑤ System Code
③ Process Abbreviation ⑥ Sequential Number
The abbreviations for segments 1, 2, 3 and 5 are listed in Table A, B and C respectively, and are attached at the end of this document. The abbreviations for segment 4 (facility equipment Asset Type) are listed in Table D, also attached at the end of this document. Field instrumentation and process control abbreviations for segment 4 shall be based on ISA-5.1 Identification Letters, listed in Table E (attached at the end of this document). If the ISA-5.1 Identification Letters falls under “User’s Choice” the proposed identification letters shall be submitted to Public Works Engineering Department for approval.

The tag numbering for the instrument tags is shown in Figure 4 below. The tag numbering will be made up of three segments.

Figure 4 – General Instrumentation Symbol with Tag Number Segment Key
EE ISA 5.1 Identification Letter
FF System Code
GGG Sequential Number
EE
FF-GGG
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APPENDIX F
ATTACHMENT 2

1.4 Equipment Naming Examples
This section presents four equipment naming examples.

Example 1: Equipment name for a pump located in the solids treatment process area.

WQCF-SLDT-DIG-PMP-07-001

1. Wastewater Quality Control Facility

2. Solids Treatment

3. Digesters

4. Pump

5. Solids Treatment System Code

6. Facility Equipment number 1
Example 2: Equipment name for a temperature element located in the solids treatment process area.

WQCF-SLDT-DIG-TE-07-001

1. Wastewater Quality Control Facility

2. Solids Treatment

3. Digesters

4. Temperature Element

5. Solids Treatment System Code

6. Control Instrument number 1
Example 3: Equipment name for a pump located in the wastewater station area.

WWC-WW10-WW-PMP-10-001

1. Wastewater Collection

2. Wastewater Station 10

3. Wastewater

4. Pump

5. Wastewater Station System Code 10

6. Facility Equipment number 1
Example 4: Equipment name for a generator located in the stormwater station area.

SWC-SW21-SW-GEN-21-001

1. Stormwater Collection

2. Stormwater Station 21

3. Emergency Power

4. Generator

5. Stormwater Station System Code 21

6. Facility Equipment number 1
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APPENDIX F
ATTACHMENT 2
Table A - WQCF System Location and Abbreviations
①
Facility Location
②
Systems Location
Process/Sub-System
Description
③
Process/SubSystem
Abbreviation
④
Asset
Type
⑤
System
Code
WQCF Headworks(HWK)
Refer to Table D for asset type abbreviations
01 Foul Air Removal FAR
Influent Pumping Station IPS
Barscreens BSN
Septage Receiving SEP
Primary Treatment
(PT) 02
North & South Grit Removal NGR, SGR
Primary Sedimentation Basins NPSB, SPSB
Biological Treatment
(BIO) 03
Biotowers BIOT
North & South Aeration Basins NAB, SAB
Secondary Treatment
(ST) 04
North & South Secondary
Clarifiers NSC, SSC
North & South RAS NRAS, SRAS
Secondary Effluent Equalization
Pond SEEP
Tertiary Treatment
(TT) 05
Filter Feed Pump Station FFPS
Flocculation FLOC
Tertiary Filtration TF
Chemical Feed CHMF
Disinfection (DIS) 06
UV Disinfection UV
Effluent Pump Station EPS
Solids
Treatment (SLDT) 07

DAFT DAF
North & South WAS NWAS, SWAS
Digesters DIG
Sludge Blending SLB
Dewatering DEW
Gas Flare GFL
Centrifuge CENT
Centrifuge Polymer CPLY
Food Waste FWST
RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX F
ATTACHMENT 2
①
Facility Location
②
Systems Location
Process/Sub-System
Description
③
Process/SubSystem
Abbreviation
④
Asset
Type
⑤
System
Code
Fats Oils Greases FOG
Refer to Table D for asset type abbreviations
Compressed Natural Gas CNG
Biogas Handling BIOG
Digester Chemical Sys (Ferric) DCS
Emergency
Ponds (EPD) 08
Secondary Effluent Storage
Pond SESP
River Outfall (RIO) 09
River Outfall RIO
Recycled Water RW 10
Recycled Water Pump Station RWPS
RW Chlorine Contact Tank CCT
RW Disinfection RWDS
UV Recycled Water Pump
Station UVRW
Commercial and Residential
Recycled Fill Station System CRWS,RRWS
Laboratory (LAB) 11
Vacuum system VAC
Compressed Air system CAS
Deionized water system DI
metals analysis system MET
Anion analysis system IC
Ancillary Systems AS
Plant Water System
(PW) 12
1 Water (potable) 1W
2 Water (non-potable) 2W
3 Water Recycled Water 3W
Power (PWR) 13
Normal Power NP
Emergency Power EPW
Irrigation (IRR) IRR 14
Irrigation Pump Station IRPS
Industrial Pond (Eckerts) IDP
Agricultural Fields IAG
Computer System
(CPS) 15
Network NET

SCADA SCD
RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX F
ATTACHMENT 2
Table B – Collection System Location and Abbreviations
①
Facility Location
②
Systems Location
Process/Sub-System
Description
③
Process/SubSystem
Abbreviation
④
Asset
Type
⑤
System
Code
Wastewater
Collections
(WWC)
Refer to Table D for asset type abbreviations
Wastewater
Station Number
(WW##)*
Station
Number
Wastewater WW
Stormwater
Collections
(SWC)

Stormwater
Station Number
(SW##)*
Station
Number
* Number ## (SW21)* Stormwater “city owned” SW
* Letter ## (SWBB)* Stormwater “private owned” SW
Stormwater
Treatment
(SWT##)*
Stormwater Treatment SWT
*Note, consult with the Engineering Department for the station number (##).

RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX F
ATTACHMENT 2
Table C – Water System Location and Abbreviations
①
Facility Location
②
Systems
Location1
Process/Sub-System
Description
③
Process/Sub-System
Abbreviation
④
Asset
Type
⑤
System
Code
Water Production
(WATP)
Refer to Table D for asset type abbreviations
Water Tank
Number
(WTNK##)2
Tank
Number
Tank TNK
Basin BSN
Water Treatment TRT
Water Well
Number
(WWL##)2
Well
Number
Well Well
Water Treatment TRT
Water Pump Station WPS
Water Treatment
Number
(WTRT##)2
Water Treatment TRT
CATF## Water Treatment TRT

AMI (FUTURE)
Notes:

1. Naming convention for the Water Distribution assets was already identified in the Public Works GIS System.

2. Note, consult with the Engineering Department for the tank, well, treatment number (##).

RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX F
ATTACHMENT 2
Table D – WQCF and Collection Asset Type and Abbreviations (Segment 4 of the Naming Convention)

ID DESCRIPTION ID DESCRIPTION
ABS Air Blast System CNV Conveyor
ANC Acid Neutralization Chamber CONT Container
AC Air Conditioner CRD Chart Recorder
ACL Auto Clave CVLT Con Vault Fuel Tank
ACT Actuator CV Control Valve
ADL Auto Dialer CWR Clothes Washer
ADM Air Diffusion Module DF Disk Filter
AE Analyzing Element DIW Deionized Water
AFD Adjustable Frequency Drive DO Dissolved Oxygen
AHU Air Handling Unit DPIS Differential Pressure Ind Switch AIT Analyzing Ind Transmitter DPIT Differential Pressure Ind Trans AMO Ammonium DPR Dampener
ARV Air Release Valve DRY Dryer
ATS Automatic Transfer Switch DS Distribution Switch
AUX Auxiliary Supporting Equip DSBE Distribution Bus Electrical AWS Acid Wash Station DTRK Dump Truck
BAT Battery DVR Digital Video Recorder
BCG Bio CNG Unit DWR Dishwasher
BFP Backflow Preventer EPS Effluent Pump Station
BIN Cake Bins EQV Earthquake Valve
BKP Breaker Panel EWS Eye Wash Station
BLDG Building
BLR Blower EVAP Evaporative Cooler
BNK Bank EXH Exhaust
BOL Boiler FAN Fan
BRB Brown Bear Attachment FAR Flame Arrestor
BSC Box Scraper Attachment FD Flight Drive
BSN Bar Screen FEQ Field Equipment
BV Butterfly Valve FEX Flow Element Devices
CAM Camera FIB Flow Indication Beacon
CART Golf Cart FIT Flow Indicating Transmitter
CDT Condensate Trap FKL Forklift
CENT Centrifuge FLDR Front Loader
CFD Chemical Feeder FLR Flare
CGS Combustible Gas Sensor FLT Filter
CHLR Chiller FM Flow Meter
CHN Channel FMR Flail Mower Attachment
CHV Check Valve FRC Furnace
CLDR Case Loader FS Float Switch
CMP Compressor FSH Float Switch High Level
CNG Compressed Natural Gas Unit FSL Float switch Low Level RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX F
ATTACHMENT 2

ID DESCRIPTION ID DESCRIPTION
GAC Granular Activated Carbon PCMP Portable Air Compressor GBX Gearbox PDC Power Distribution Center
GDT Gas Detector PDS Pressure Differential Switch
GEN Generator PGEN Portable Generator
GFL Gas Flare PHR Portable Hose Reel
GOP Gate Operator Drive Unit PIT Pressure Indicating Transmitter GRD Grinder PLC Programmable Logic Controller
GV Gate Valve PLY Poly
HEX Heat Exchanger PMP Pump
ICE Ice Machine PMS Plasma Mass Spectroscopy
KV Knife Valve PND Pond
LAPT Laptop PNL Panel
LCP Local Control Panel PPL Pipeline
INC Incubator PPLG Portable 36" Pipe Plug
IV Isolation Valve PPMP Portable 3", 6" Pump
LDB Load Bank PRNT Printer
LDR Loader PRV Pressure Reducing Valve
LI Level Indicator PS Pressure Switch
LIT Level Indicating Transmitter PSV Pressure Safety Valve LKR Locker Room PV Pressure Valve
LNR Liner PVM Pinch Valve Manual
LS Level Switch PW Pressure Washer
LT Light REG Regulator
LUB Lubricator-Automatic, Pressure RVSS Reduced Voltage Soft Starter LVR Louver SBD Switch Board
MBA Mechanical Brush Aerator SCB Scrubber
MCC Motor Control Center SCG Security Gate
MEC Mechanism SCN Screen
MEM Membrane SCRT Spray Cart
MOV Motor Operated Valve SCV Screw Conveyor
MPS Module Power Supply SDS Storm Debris Separator
MTN Maintenance SE Speed Element
MTR Motor SFT Water Softener
MXR Mixer SKM Skimmer
NIT Nitrate SKS Skid Steer (BobCat)
NSW Network Switch SLG Slide Gate
OCU Odor Control Unit SMP Sampler
ORP Oxygen Reduction Potential SP Sump Pump
OVN 180 Solids oven SPD Surge Protection Device
PAT Pneumatic Air Tank SS Safety Shower
PC Personnel Computer STN Strainer
RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX F
ATTACHMENT 2

ID DESCRIPTION ID DESCRIPTION
SV Solenoid Valve VFD Variable Frequency Drive
SUMP Sump Pits VNT Ventilator
VS Vibration Switch
SWGR Switch Gear WAH Wet Well Access Hatch
SWP Sweeper Attachment WD Weight Differential
SYS System WE Weight Element
TE Temperature Element WIT Weight Indicating Transmitter TEK ISO Temperature Unit (Lab) WOSS Water Oil Sand Separator TIT Temp Indicating transmitter WRW Weir Washer
TNK Tank WTH Water Heater
TRK Truck VACU Vacuum Unit
TRKT Tractor VNT Ventilator
TS Temperature Switch XFMR Transformer
TSH Temp Switch High YLT Yard Lighting
TURB Turbidity Meter ZS Door Intrusion
TV Telescoping Valve ZSH Smoke Detector
TWSS Truck Wash Station Sump
UPS Uninterruptible Power Supply
UVW UV System Bulb Washer
VACT Vaccon Truck
VAL Valve
SWGR Switch Gear
RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX F
ATTACHMENT 2
Table E – ISA-5.1 Identification Letters (Segment 4, used for loop diagrams and P&IDs) First Letters Succeeding Letters
Measured/ Initiation
Variable Variable Modifier Readout/Passive Function
Output/Active
Function
Function
Modifier
A Analysis Alarm
B Burner, Combustion User's Choice User's Choice User's Choice C User's Choice Control Close
D User's Choice Difference, Differential Deviation
E Voltage Sensor, Primary Element
F Flow, Flow Rate Ratio
G User's Choice Glass, Gauge, Viewing
Device
H Hand High
I Current Indicate
J Power Scan
K Time, Schedule Time Rate of Change Control Station
L Level Light Low
M User's Choice Middle,
Intermediate
N User's Choice User's Choice User's Choice User's Choice O User's Choice Orifice, Restriction Open
P Pressure Point (Test Connection)
Q Quantity Integrate, Totalize Integrate, Totalize
R Radiation Record Run
S Speed, Frequency Safety Switch Stop
T Temperature Transmit
U Multivariable Multifunction Multifunction
V Vibration, Mechanical
Analysis
Valve, Damper,
Louver
W Weight, Force Well, Probe
X Unclassified X-axis Accessory Devices,
Unclassified Unclassified Unclassified
Y Event, State, Presence Y-axis Auxiliary Devices
Z Position, Dimension Z-axis, Safety
Instrumented System
Driver, Actuator,
Unclassified final
control element
RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX F
ATTACHMENT 2
Notes:

RFP: WQCF CAPACITY IMPROVEMENTS

APPENDIX F
ATTACHMENT 2