AGENDA REGULAR MEETING BOARD OF DIRECTORS ORANGE COUNTY WATER DISTRICT 18700 Ward Street, Fountain Valley, CA (714) 378-3200 Wednesday, May 1, 2019 – 5:30 p.m. Teleconference Site: 300 No. Flower St., Room 788, Santa Ana, CA * Members of the public may attend and participate at both locations. PLEDGE OF ALLEGIANCE ROLL CALL 1. ORANGE COUNTY SCIENCE & ENGINEERING FAIR STUDENT WINNERS OF OCWD SPECIAL AWARDS ● EMPLOYEE OF THE QUARTER AWARD TO ERNEST NUNEZ, ENVIRONMENTAL SPECIALIST - DATA ANALYST ITEMS RECEIVED TOO LATE TO BE AGENDIZED RECOMMENDATION: Adopt resolution determining need to take immediate action on item(s) and that the need for action came to the attention of the District subsequent to the posting of the Agenda (requires two-thirds vote of the Board members present, or, if less than two-thirds of the members are present, a unanimous vote of those members present.) VISITOR PARTICIPATION Time has been reserved at this point in the agenda for persons wishing to comment for up to three minutes to the Board of Directors on any item that is not listed on the agenda, but within the subject matter jurisdiction of the District. By law, the Board of Directors is prohibited from taking action on such public comments. As appropriate, matters raised in these public comments will be referred to District staff or placed on the agenda of an upcoming Board meeting. At this time, members of the public may also offer public comment for up to three minutes on any item on the Consent Calendar. While members of the public may not remove an item from the Consent Calendar for separate discussion, a Director may do so at the request of a member of the public. CONSENT CALENDAR (ITEMS NO. 2 - 4) All matters on the Consent Calendar are to be approved by one motion, without separate discussion on these items, unless a Board member or District staff request that specific items be removed from the Consent Calendar for separate consideration. 2. APPROVAL OF CASH DISBURSEMENTS RECOMMENDATION: Ratify/authorize payment of bills 3. APPROVAL OF MINUTES OF BOARD OF DIRECTORS MEETINGS HELD APRIL 3, 2019 RECOMMENDATION: Approve minutes as presented
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AGENDA REGULAR MEETING BOARD OF DIRECTORS
ORANGE COUNTY WATER DISTRICT 18700 Ward Street, Fountain Valley, CA (714) 378-3200
Wednesday, May 1, 2019 – 5:30 p.m.
Teleconference Site: 300 No. Flower St., Room 788, Santa Ana, CA
* Members of the public may attend and participate at both locations.
PLEDGE OF ALLEGIANCE
ROLL CALL
1. ORANGE COUNTY SCIENCE & ENGINEERING FAIR STUDENT WINNERS OF OCWDSPECIAL AWARDS
● EMPLOYEE OF THE QUARTER AWARD TO ERNEST NUNEZ, ENVIRONMENTALSPECIALIST - DATA ANALYST
ITEMS RECEIVED TOO LATE TO BE AGENDIZED
RECOMMENDATION: Adopt resolution determining need to take immediate action on item(s) and that the need for action came to the attention of the District subsequent to the posting of the Agenda (requires two-thirds vote of the Board members present, or, if less than two-thirds of the members are present, a unanimous vote of those members present.)
VISITOR PARTICIPATION
Time has been reserved at this point in the agenda for persons wishing to comment for up to three minutes to the Board of Directors on any item that is not listed on the agenda, but within the subject matter jurisdiction of the District. By law, the Board of Directors is prohibited from taking action on such public comments. As appropriate, matters raised in these public comments will be referred to District staff or placed on the agenda of an upcoming Board meeting.
At this time, members of the public may also offer public comment for up to three minutes on any item on the Consent Calendar. While members of the public may not remove an item from the Consent Calendar for separate discussion, a Director may do so at the request of a member of the public.
CONSENT CALENDAR (ITEMS NO. 2 - 4)
All matters on the Consent Calendar are to be approved by one motion, without separate discussion on these items, unless a Board member or District staff request that specific items be removed from the Consent Calendar for separate consideration.
2. APPROVAL OF CASH DISBURSEMENTS
RECOMMENDATION: Ratify/authorize payment of bills
3. APPROVAL OF MINUTES OF BOARD OF DIRECTORS MEETINGS HELD APRIL 3, 2019
RECOMMENDATION: Approve minutes as presented
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4. EXTENSION OF CALIFORNIA DEPARTMENT OF TOXIC SUBSTANCES CONTROL (DTSC) OVERSIGHT AGREEMENT - NORTH BASIN
RECOMMENDATION: Authorize two-year extension of Agreement with the DTSC for
reimbursement of costs in an amount not to exceed $82,445 through calendar year 2020 to review documents prepared by the District for the North Basin RI/FS
END OF CONSENT CALENDAR
INFORMATIONAL ITEMS 5. UPDATE ON RESEARCH & DEVELOPMENT (R&D) ACTIVITIES 6. SANTA ANA WATERSHED PROJECT AUTHORITY ACTIVITIES 7. COMMITTEE/CONFERENCE/MEETING REPORTS ► April 24 - Joint Planning Committee (Chair Green) ► Reports on Committees/Conferences/Meetings Attended at District Expense 8. VERBAL REPORTS
PRESIDENT'S REPORT GENERAL MANAGER'S REPORT DIRECTORS’ REPORTS GENERAL COUNSEL REPORT
RECESS TO CLOSED SESSION ● CONFERENCE WITH LABOR NEGOTIATORS [Government Code Section 54957.6] OCWD designated representative: Stephanie Dosier ¤ Employee Organization: Orange County Employee Association: and ¤ Non-Represented Employees (Confidential and Management) RECONVENE IN OPEN SESSION ADJOURNMENT
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Agenda Posting: In accordance with the requirements of California Government Code Section 54954.2, this agenda has been posted in the main lobby of the Orange County Water District, 18700 Ward Street, Fountain Valley, CA and on the OCWD website: www.ocwd.com not less than 72 hours prior to the meeting date and time above. All written materials relating to each agenda item are available for public inspection in the office of the Assistant District Secretary. Backup material for the Agenda is available at the District offices for public review and can be viewed online at the District’s website: www.ocwd.com. Accommodations to the Disabled: Pursuant to the Americans with Disabilities Act, persons with a disability who require a disability-related modification or accommodation in order to participate in a meeting, including auxiliary aids or services, may request such modification or accommodation from the District Secretary at (714)378-3233, by email at [email protected] by fax at (714) 378-3373. Notification 24 hours prior to the meeting will enable District staff to make reasonable arrangements to assure accessibility to the meeting. Availability of Agenda Material: As a general rule, agenda reports or other written documentation that has been prepared or organized with respect to each item of business listed on the agenda can be reviewed at www.ocwd.com. Copies of these materials and other disclosable public records distributed to all or a majority of the members of the Board of Directors in connection with an open session agenda item are also on file with and available for inspection at the Office of the District Secretary, 18700 Ward Street, Fountain Valley, California, during regular business hours, 8:00 a.m. to 5:00 p.m., Monday through Friday. If such writings are distributed to members of the Board of Directors on the day of a Board meeting, the writings will be available at the entrance to the Board of Directors meeting room at the Orange County Water District office.
Subject: ORANGE COUNTY SCIENCE & ENGINEERING FAIR STUDENT WINNERS OF OCWD SPECIAL AWARDS
SUMMARY
The Orange County Water District (OCWD) recently honored Orange County Science & Engineering Fair students (OCSEF) in grades 6-12 for outstanding and innovative water-related projects. There were 10 winning teams. At the May 1 OCWD Board meeting, students will be in attendance to receive OCWD certificates and checks totaling $3,000.
The following students were chosen to receive 2019 OCWD Special Awards at the OCSEF:
Junior Division (grades 6-8)
• Minaret Academy student Jenna Darwish was awarded $100 for “UV WaterDisinfection.”
• Minaret Academy student Hunaina Hirji was awarded $100 for “Is it the Right Pipe?”
• Talbert Middle School student Kelsey Coppa was awarded $100 for “A HomemadeClosed Loop Shower System.”
• University Park Elementary School students Giselle Duregger and teammatesYousef Alsharif and Berra Ozgun were awarded $100 for “Desalination Device.”
• Venado Middle School student Akshit Gupta was awarded $100 for “Surface WaterCleaning Ro-Boat.”
• Venado Middle School student Swara Kulkarni and teammates Prakruthi Praveenand Poorvi Kheni were awarded $100 for “Deceiving Droplets: The Elucidation ofTap Water and Bottled Water Distinctions.”
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Senior Division (grades 9-12)
• Villa Park High School student Ryan Brown was awarded $200 for “We Never Knowthe Worth of Water Till the Well is Dry.”
• Cornelia Connelly High School students Allison Hernandez and Samie Baclig wereawarded $500 for “Going With the Flow: Using Flocculation to Determine Amount ofTotal Suspended Solids in Freshwater Samples.”
• Woodbridge High School student Joanmarie Hardcastle was awarded $700 for “TheEffect of Water Quality on Macroinvertebrate Colonization and Algae Growth.”
• University High School student Pranav Moudgalya was awarded $1,000 for“Assessment of Organic Waste Materials in Nitrate Filtration of Southern CaliforniaWaters.”
RECOMMENDATION
Informational
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AGENDA ITEM SUBMITTAL
Meeting Date: May 1, 2019 Budgeted: N/A Budgeted Amount: To: Board of Directors Cost Estimate $4,340,318.94 Funding Source: N/A Program/Line Item No. N/A From: Mike Markus General Counsel Approval: N/A Engineers/Feasibility Report: N/A Staff Contact: M. Ochoa CEQA Compliance: N/A Subject: APPROVAL OF CASH DISBURSEMENTS SUMMARY For the period of April 11, 2019 through April 24, 2019 including manual checks and wire transfers, staff is presenting cash disbursements totaling $4,340,318.94 disbursed for each period as follows.
Accounts Payable:
04/11/2019 to 04/17/2019 $ 1,665,017.59
04/18/2019 to 04/24/2019 $ 1,600,260.63
Payroll:
$ 1,075,040.72
Total Disbursements $ 4,340,318.94
RECOMMENDATION Ratify/Authorize payment of bills PRIOR RELEVANT BOARD ACTION(S) Semi-monthly
Check No. Vendor Name Invoice # Invoice Amount Check Amount
Accounts Payable Check Register Presented for Board Ratification and/or Approval
1Begin Date:
Check Register
Orange County Water District
Page:End Date: 04/17/201904/11/2019
Date FYTDPurpose
$55.00 Inv# MARCH 2019 CC BH#21 LVS/BH: CA-NV AWWA
certificati
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$18.81 Inv# MARCH 2019 CC BH#22 RLP/BH: name
plate/Dir.Zahra
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$200.00 Inv# MARCH 2019 CC BH#23 KL/BH: job post/Sr.I&E
technic
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$200.00 Inv# MARCH 2019 CC BH#24 KL/BH: job post/R&D Lab
Techni
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$19.98 Inv# MARCH 2019 CC BH#25 EL/BH: EIN labels/new
excavato
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$127.70 Inv# MARCH 2019 CC BH#26 RJO/BH: electric cart
parts
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$84.96 Inv# MARCH 2019 CC BH#27 MRM/BH: Register/FHQ
thru 6/12
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$350.35 Inv# MARCH 2019 CC BH#28 RSW/BH: syringe filtersU.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$100.00 Inv# MARCH 2019 CC BH#29 BCD/BH:Cloud user
4/22-4/21
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$133.76 Inv# MARCH 2019 CC BH#2B SD/BH: safety lens/HZRU.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$150.00 Inv# MARCH 2019 CC BH#3 JDB/BH: truck washesU.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$188.00 Inv# MARCH 2019 CC BH#30 DS/BH: CWEA
membership
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$772.27 Inv# MARCH 2019 CC BH#33 RSW/BH: supplies for
tour
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$293.90 Inv# MARCH 2019 CC BH#34 RSW/BH: chlorine test
strips
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$220.00 Inv# MARCH 2019 CC BH#35 PAB/BH: ASSP
membership
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$543.09 Inv# MARCH 2019 CC BH#36 JRS/BH: motorU.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$28.50 Inv# MARCH 2019 CC BH#37 JRS/BH: capU.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$115.60 Inv# MARCH 2019 CC BH#39 JRS/BH: valve ballU.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$731.10 Inv# MARCH 2019 CC BH#4 JRS/BH: telesteps laddersU.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
Check No. Vendor Name Invoice # Invoice Amount Check Amount
Accounts Payable Check Register Presented for Board Ratification and/or Approval
2Begin Date:
Check Register
Orange County Water District
Page:End Date: 04/17/201904/11/2019
Date FYTDPurpose
$667.80 Inv# MARCH 2019 CC BH#40 MVP/BH: painting/room
C4
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$111.96 Inv# MARCH 2019 CC BH#41 EHC/BH: purifier/tablet
glass
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$195.28 Inv# MARCH 2019 CC BH#5 PMD/BH: PCB switchU.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$25.07 Inv# MARCH 2019 CC BH#6 RSW/BH: CWEF
supplies-chalk
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$74.85 Inv# MARCH 2019 CC BH#9 MRM/BH: LA Times/F.V.
Thru 5/2
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$50.00 Inv# MARCH 2019 CC ET#1 CLN/ET: Facebook Drip
Drop ad
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$49.00 Inv# MARCH 2019 CC ET#2 CLN/ET: Slick Text
subscriptio
U.S. BANK CORPORATE PAYMENT
SYSTEM
91290 04/17/2019
$1,159.40 Inv# PATEL 2/24-3/1/19 TRAVEL5 2/24-3/1 New
MINUTES OF MEETING BOARD OF DIRECTORS, ORANGE COUNTY WATER DISTRICT
April 3, 2019, 5:30 p.m.
President Sarmiento called to order the April 3, 2019 regular meeting of the Orange County Water District Board of Directors at 5:30 p.m. in the Boardroom at the District office. Following the Pledge of Allegiance to the Flag, the District Secretary called the roll and reported a quorum as follows.
Directors Denis Bilodeau Jordan Brandman Cathy Green Dina Nguyen (absent) Kelly Rowe Vicente Sarmiento Stephen Sheldon (absent) Tri Ta Roger Yoh Ahmad Zahra
Staff Michael R. Markus, General Manager Joel Kuperberg, General Counsel Janice Durant, District Secretary
CONSENT CALENDAR
The Consent Calendar was approved upon motion by Director Green, seconded by Director Rowe and carried as follows [8-0], with Director Brandman abstaining on Item No. 1, Cash Disbursements-items relating to Butier Engineering, due to a prior business relationship, and Orange County Conservation Corps due to a current business relationship. Ayes: Bilodeau, Brandman, Green, Rowe, Sarmiento, Ta, Whitaker, Yoh Abstain: Brandman – partial abstention on Item No. 1 Absent: Nguyen, Sheldon
CONSENT CALENDAR
1. Approval of Cash Disbursements
MOTION NO. 19-49 APPROVING CASH DISBURSEMENTS
Payment of bills for the period March 14, 2019 through March 27, 2019 in the total amount of $11,445,037.03 is ratified and approved.
4/03/2019
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2. Approval of Minutes of Board Meeting
MOTION NO. 19-50 APPROVING MINUTES OF BOARD MEETING
The minutes of the Board of Directors meeting held March 6, 2019 are approved as presented. 3. 2019 Board Committee and Outside Agency Assignments
MOTION NO. 19-51 APPROVING 2019 COMMITTEE AND OUTSIDE AGENCY ASSIGNMENTS
The 2019 Committee and Outside Agency assignments as recommended by the Board President are hereby approved as presented. ITEMS RECOMMENDED FOR APPROVAL AT RETIREMENT COMMITTEE MEETING HELD MARCH 26, 2019 4. 457(B) Deferred Compensation Plan Red Flag Fund Review
MOTION NO. 19-52 APPROVING 457(B) DEFERRED COMPENSATION PLAN RED FLAG FUND REVIEW
The following actions in connection with the 457(B) Deferred Compensation Plan Red Flag Fund Review are hereby approved as follows:
INVESTMENT FUNDS SYMBOL ACTION 457 (B) Portfolio PGIM Jennison Health Sciences Z PHSZX Remove and Map to PRHSX Virtus Vontobel Emerging Markets Opps I HIEMX Remove and Map to JEMOX
INFORMATIONAL ITEMS 5. 2019 Children’s Water Education Festival Director of Public Affairs Eleanor Torres provided an update on the 2019 Children’s Water Education Festival held March 27-28, 2019 at the University of California, Irvine campus. She advised that 7,277 5th grade students from 91 schools attended the festival. The Directors noted that many of the elementary schools are on spring break during the Festival and requested that alternate dates and facilities be explored for future festivals.
4/03/2019
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6. Investigating Horizontal Collector Well for GWRS Recharge Recharge Planning Manager Adam Hutchinson advised that the District is investigating the potential for using a horizontal collector well to recharge GWRS water. With the upcoming GWR Final Expansion, he stated additional locations to recharge GWRS water will be useful to free up capacity in basins used to capture storm water and to provide operational flexibility. 7. Santa Ana Watershed Project Authority Activities General Manager Markus reported on the SAWPA Commission meeting held April 2, 2019, noting that SAWPA adopted its budget for 2020-21. 8. Committee/Conference/Meeting Reports Director Ta reported on the March 26 Retirement Committee. VERBAL REPORTS President Sarmiento reported that he provided testimony to the Subcommittee on Water, Oceans, and Wildlife in Washington DC on April 2, 2019. He also reported on his advocacy trip to Washington DC on March 25-26 to meet with the legislators. Directors Bilodeau, Rowe, and Zahra reported on their attendance at the SAWPA Conference at California State University, Fullerton. Director Bilodeau also reported on his attendance at the Orange County Science Fair on March 22. Director Green reported on her attendance at the ACWA Board meeting in Sacramento on March 29. General Manager Markus noted that the upcoming ACWA Spring Conference conflicts with the May Water Issues and Administration and Finance Issues Committee meetings. He suggested the Committees and the second Board meeting in May be moved back a week. The Board agreed to the following May calendar changes: May 15 – Water Issues Committee May 16 – Administration and Finance Issues Committee May 22 – Board of Directors meeting ADJOURNMENT There being no further business to come before the Board, the meeting was adjourned at 6:17 p.m. _____________________________________ Janice Durant, District Secretary
4/03/2019
4
________________________________ Vicente Sarmiento, President
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1
AGENDA ITEM SUBMITTAL Meeting Date: May 1, 2019
Budgeted: Yes (FY18-19) Budgeted Amount: $45,000
Cost Estimate: $82,445 (for two years) To: Board of Directors Funding Source: General Fund Program/ Line Item No.: 1075.51112.9985 From: Mike Markus General Counsel Approval: Yes Engineers/Feasibility Report: N/A Staff Contact: W. Hunt/R. Herndon/ D. Mark
CEQA Compliance: N/A
Subject: EXTENSION OF CALIFORNIA DEPARTMENT OF TOXIC SUBSTANCES
CONTROL (DTSC) OVERSIGHT AGREEMENT - NORTH BASIN SUMMARY District staff has negotiated and recommends Board approval of a two-year extension of the existing California Department of Toxic Substances Control (DTSC) reimbursement agreement for their review of documents prepared as part of the remedial investigation and feasibility study (RI/FS) in the North Basin. Attachment: • Agreement with DTSC
RECOMMENDATION Authorize two-year extension of Agreement with the DTSC for reimbursement of costs in an amount not to exceed $82,445 through calendar year 2020 to review documents prepared by the District for the North Basin RI/FS. BACKGROUND/ANALYSIS In 2014, the Board authorized staff to develop strategies to remediate groundwater contamination in the North Basin area consistent with the National Contingency Plan (NCP). The District initiated a RI/FS in cooperation with and under the direction of the U.S. Environmental Protection Agency (EPA) to address the groundwater contamination. For the RI/FS, the District’s consultants, AECOM and Intera, will be preparing several key documents, including an RI report, groundwater modeling reports, human health risk assessment, several technical memoranda, and an FS. The NCP requires State involvement during the RI/FS, including review of the key documents. State acceptance of the proposed remedy is considered by EPA in selecting the remedy. The Administrative Settlement Agreement between EPA and OCWD requires OCWD to submit the key RI/FS documents to the State, specifically the RWQCB and the Department of Toxic Substances Control (DTSC).
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In keeping with the District’s policy to implement the North Basin RI/FS in an NCP-compliant manner, staff recommends Board approval of the cost reimbursement agreement with DTSC and payments not to exceed $82,445 through calendar year 2020. Budgets for subsequent years will be brought to the Board for approval. The attached agreement was previously approved by the Board in December 2017.
DTSC Project Estimate for Two Years Oversight of North Basin RI/FS
PRIOR RELEVANT BOARD ACTIONS 12/6/17, 17-12-153 - Authorize execution of Agreement with the DTSC for reimbursement of costs in an amount not to exceed $70,706 through calendar year 2018 to review documents prepared by the District for the North Basin RI/FS. 4/19/17, 17-4-52 - Authorize execution of Agreement with the RWQCB for reimbursement of costs in an amount not to exceed $64,000 to review documents prepared by the District for the North Basin RI/FS and the District’s Proposition 1 grant applications for North Basin projects. 9/7/16, R16-9-115 - Approve and authorize execution of the revised Administrative Settlement Agreement with the USEPA to oversee the District’s performance of the RI/FS for groundwater contamination in the North Basin area. 7/20/16, R16-7-106 - Authorize General Manager to negotiate the final terms of the Administrative Settlement Agreement and execute, subject to approval as to form by legal counsel, committing the District to perform the RI/FS Statement of Work under USEPA oversight. 6/15/16, M16-89 - Direct staff to finalize the terms of the Administrative Settlement Agreement with the USEPA for the North Basin RI/FS, and return to the Board for approval of such Agreement.
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3/12/15, M15-50 - Authorize staff to negotiate a draft Agreement with the USEPA to establish the USEPA as the regulatory oversight agency for the District’s North Basin technical activities. 3/19/14, R14-3-00 - Direct staff to agendize the consideration of initiating the NCP process on the North Basin Groundwater Protection Project.
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ATTACHMENT 1
AGREEMENT BETWEEN OCWD AND THE CA DEPARTMENT OF TOXIC SUBSTANCES CONTROL
STATE OF CALIFORNIA - DEPARTMENT OF GENERAL SERVICES .--------------.--------------�
STANDARD AGREEMENT
STD 213 {Rev. 10/2018)
CONTRACTING AGENCY NAME
Department ofToxic Substances Control CONTRACTING AGENCY ADDRESS
1001 I Street, P.O. Box 806 PRINTED NAME OF PERSON SIGNING
CALIFORNIA DEPARTMENT OF GENERAL SERVICES APPROVAL
AGREEMENT NUMBER
18-T4608
STATE OF CALIFORNIA
PURCHASING AUTHORITY NUMBER {If Applicable)
CITY STATE ZIP
Sacramento JCA 95812 TITLE
Procurement & Contracting Officer DATE SIGNED
EXEMPTION {If Applicable)
DGS Exemption Letter 40.07
Paqe 2 of 2
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AGENDA ITEM SUBMITTAL
Meeting Date: May 1, 2019 Budgeted: N/A Budgeted Amount: N/A To: Board of Directors Cost Estimate: N/A Funding Source: N/A Program/ Line Item No. N/A From: Mike Markus General Counsel Approval: N/A Staff Contact: M. Plumlee/J. Dadakis
Subject: UPDATE ON RESEARCH & DEVELOPMENT (R&D) ACTIVITIES SUMMARY Applied research by the District is ongoing to evaluate closed circuit reverse osmosis (CCRO) for the treatment and recovery of the reverse osmosis concentrate (ROC) waste stream from the Groundwater Replenishment System (GWRS), which is currently discharged to the ocean via the Orange County Sanitation District (OCSD) outfall. Staff will provide an update on the CCRO pilot testing, funded by a grant from U.S. Bureau of Reclamation (USBR), as well as provide an update on a separate USBR-funded project testing novel methods for ensuring RO membrane integrity. Finally, two other new projects will briefly be highlighted. Attachments:
1) Presentation 2) R&D Project Update Report for Q1 2019 (22 April 2019)
RECOMMENDATION Informational
Board of Directors MeetingMay 1, 2019
Update on R&D Activities
2
Biannual R&D Summary Report
• 28 current projects / programs
• Publications (3)
– Environmental Sci.: Water Research & Tech.
– J. of Membrane Science
– WRF Report
3
Recent Outcomes (past 6 months)
• Conference Outreach (10)
– 6 presentations accepted for WateReuse CA Conf. (March)
• Wastewater Virus LRV Study [MWD grant + WRF grant]
5
CCRO Pilot Testing - Background
6
RO Concentrate
Stage 1 Stage 2 Stage 3RO Feed(MF effluent)
RO Permeate130 MGD
23 MGD153 MGD
85% Recovery
Final expansion:
concentrate disposal 23 MGD
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RO Concentrate
Stage 1 Stage 2 Stage 3RO Feed(MF effluent)
RO Permeate139 MGD
23 MGD153 MGD ~90-95%
Recovery(Overall)
Hypothetical:
concentrate disposal 14 MGD
9 MGD
CCRO
• Current status / progress:
– Treating plant RO concentrate as the feed water
– Recovery is 57-61% (corresponding to 91% overall)
– Successfully achieved ~ 2 mo. interval between cleanings. Using plant RO feed in side conduit.
– Two sampling events for comprehensive product water quality analysis
– Planning for additional USBR grant-required tasks (e.g., virus challenge)
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CCRO Pilot Testing
RO Membrane Integrity Study
9
• Objective: to evaluate novel methods for ensuring RO process integrity via online water quality monitoring – to achieve greater regulatory credit toward required virus removal
• Update: Data collected on ATP presented at WateReuse conference
GWRS RO Facility
LRV
Membrane Biocide Evaluation
10
• Objective: test a replacement for chlorine (used to control MF and RO membrane biofouling) to avoid undesirable byproducts in finished water
• USBR grant proposal is pending
• Status: “control” pilot underway (using chlorine)
Wastewater Virus LRV at OCSD
11
• Objective: establish degree of virus removal by OCSD treatment that precedes OCWD’s advanced purification, toward regulatory credit
• Status: Test plan under review by DDW
Photo: Field concentration of water sample by UF filter
Project: Evaluation of Peroxide Disinfectants as Biofouling Controls Agents in an MF/RO Treatment
System ................................................................................................................................................. 11
Date: 22 April 2019
To: All Departments
From: Megan Plumlee (R&D)
Subject: R&D PROJECT UPDATE REPORT – Q1 2019
R&D Project Update Report Q1 2019
Page 2
Program: Assessing and Ensuring Effective Antiscalant Treatment via Real Time Online Membrane
Project: Evaluating Post-Treatment Challenges for Potable Reuse Applications
R&D Staff Contacts: Megan Plumlee, Ken Ishida
Start Date/Expected Completion: Fall 2016 to Summer 2019
External Funding: Yes (WRF and partner utilities)
This study is funded by The Water Research Foundation (WRF), formerly the Water Environment &
Reuse Foundation (WE&RF) and investigated post-treatment optimization at the Advanced Water
Purification Facility (AWPF), to balance competing goals of 1) maintaining pipeline integrity from corrosion
while 2) minimizing NDMA reformation and 3) minimizing aquifer recharge metals mobilization. OCWD
has conducted research and data collection on each topic independently; this WRF project is an
opportunity to interpret these findings together and collect additional data to address knowledge gaps.
The project team consists of OCWD, Trussell Technologies, and Stanford University, together with
several participating utilities that contributed cash funding. With respect to the NDMA studies for this
project, previously R&D evaluated historical data on NDMA occurrence and treatment efficacy in AWPF,
initiated testing for possible NDMA contamination from lime addition post-UV/AOP, and measured NDMA
formation potential in post-UV/AOP water. For this project, R&D has built on previous work through
literature review and studies including 1) further evaluation of the lime addition step (impact of elevating
pH on NDMA formation); 2) NDMA formation potential testing of individual RO permeates from AWPF RO
membranes of different ages and manufacturers; 3) evaluation of impact of UV/AOP treatment on NDMA
formation potential; 4) evaluation of NDMA formation in GWRS pipeline, among other tasks.
Project Updates
Current
• The project completion deadline was extended to April 2019 to accommodate time for partners
Trussell Technologies and Stanford University to complete research tasks and the final report.
• R&D is completing final research tasks that were delayed while the HPLC-PR-CL was repaired
(used to analyze water samples for NDMA concentration).
• R&D staff monitoring of the Trussell Technologies pipe loop systems that were installed in the RO
building was completed and Trussell staff has taken back these systems due to their completion
of this task. These exposed samples of GWRS pipeline concrete mortar lining to RO permeate
and finished product water. R&D staff measured water quality and changed out the water as
much as weekly.
• The large project team is currently drafting the draft final report with expected delivery to WRF
and its PAC in April.
R&D Project Update Report Q1 2019
Page 4
Future
• Even though the WRF project will soon reach end of contract date and WRF report will be issued,
R&D staff intends to complete certain follow-up work (e.g., minor incomplete tasks and
confirmation tasks to verify findings) towards developing a high quality scientific publications. This
includes:
o R&D will complete a second UV pilot experiments to evaluate the benefits and drawbacks
of adding lime prior to UV/AOP rather than after (as is currently done at the AWPF). This
was delayed due to HPLC-PR-CL instrument being offline.
o R&D will evaluate the influence of pH on NDMA formation in AWPF water in benchtop
experiments. Plant UV/AOP product water will be collected and the pH will be increased
using both lime and NaOH to determine the extent of NDMA “rebound” (formation) at
various pH levels. Planning was completed, but task was delayed due to HPLC-PR-CL
instrument being offline.
• A draft manuscript was revised and re-submitted for journal publication; R&D staff will develop at
least one additional scientific publication from this project.
Project: Non-Targeted Analysis of NDMA Precursors Found in the AWPF
R&D Staff Contacts: Megan Plumlee, Ken Ishida
Start Date/Expected Completion: Spring 2016 to Winter 2018
External Funding: No
This is a collaborative project with Professor David Hanigan of University of Nevada, Reno (UNR) to
isolate NDMA precursors from AWPF water at multiple locations. NDMA is a key contaminant of concern
that is monitored by OCWD in the AWPF, and it forms from reaction of unidentified precursor compounds
with chloramines that are maintained as a biocide. NDMA precursors were extracted from water samples
using a previously developed method for isolating amine compounds. In partnership with collaborators at
University of Colorado (CU), Boulder who have expertise in non-targeted analysis, the extracts were
injected onto a high performance liquid chromatography (HPLC) time of flight (TOF) mass spectrometry
(MS) system to search for and identify NDMA precursors. In addition to potentially identifying unknown
precursors in AWPF source waters, another objective was to evaluate the hypothesis that aged RO
membranes may pass more NDMA precursors compared to newer membranes, and to assess whether
the UV/AOP treatment step may produce NDMA precursors.
Project Updates
Current
• A manuscript based on the work completed for this project was published in this period; this
project is now complete. R&D is continuing collaborating with the UNR and CU team on non-
targeted analysis through two ongoing grants (USBR and NSF) (below next two projects).
R&D Project Update Report Q1 2019
Page 5
Project: Understanding Formation of a Critical Disinfection Byproduct: NDMA and
Previously Unidentified NDMA Precursors in Advanced Potable Reuse Treatment
Plants
R&D Staff Contacts: Megan Plumlee, Ken Ishida
Start Date/Expected Completion: Jan 2018 to Mar 2020
External Funding: Yes (USBR DWPR)
The goal of this study is to determine the occurrence and fate of N-nitrosodimethylamine (NDMA) and NDMA precursors in the OCWD AWPF. NDMA and unknown precursors are present in the secondary effluent that feeds the plant. RO partially removes the NDMA while the UV/AOP effectively reduces the concentration below the 2 ng/L detection limit. However, a significant concern is that NDMA can form in the product water after UV/AOP treatment (i.e., NDMA reappears) likely due to the incomplete removal of NDMA precursors during advanced treatment. NDMA precursors are diverse and few are of known chemical composition. Therefore, in this study two non-targeted analytical techniques for the identification of unknown compounds will be used to identify new NDMA precursors. Non-targeted analysis tasks will be completed at University of Nevada, Reno, University of Colorado, Boulder and San Diego State University. The study will also investigate NDMA and NDMA precursors in permeate from different RO membrane ages and manufacturers, after membrane cleaning, and in product water after UV/AOP treatment using different oxidants. RO is the first line of defense for NDMA precursors and the effectiveness of this intervention is highly necessary to reduce NDMA formation post treatment. Finally, given the importance of NDMA as a disinfection byproduct of public health concern, and the industry interest in direct potable reuse, this study will assess the potential utility of developing a rapid online NDMA analyzer via high frequency sampling to assess diurnal trends in NDMA occurrence and treatment process reliability. These tasks will allow for a greater understanding of NDMA formation in advanced water treatment facilities and identify strategies for reducing the amount of NDMA formed post treatment.
Project Updates
Current
• Two quarterly progress reports were generated for USBR in the last period, shortly followed by
grant payments to OCWD from USBR.
• Coordination is ongoing to create an OCWD subcontract as part of the USBR grant with Shannon
Roback, formerly R&D Department Postdoctoral Research Associate and now professor at
California State University at Dominguez Hills, such that Dr. Roback can complete research tasks
and leadership for the project (as a Co-PI) and accordingly receive funding from the grant.
• Planning is ongoing for multiple research tasks that were delayed due to HPLC-PR-CL instrument
being offline for an extended period (used for NDMA analysis). It is now online again.
• An initial non target analysis data report was obtained from CU based on the first of two UV-AOP
pilot tests completed by R&D.
• UNR is completing analysis of various chemicals used for water treatment at the OCWD AWPF
for their potential contribution of NDMA precursors to the finished product water (e.g., membrane
cleaning chemicals). It is largely expected that this work will rule out this possible contribution.
• R&D staff is completing a literature review and summary to serve as the first chapter of the USBR
report, regarding NDMA precursors in potable water reuse.
R&D Project Update Report Q1 2019
Page 6
• An initial test of the effect of membrane cleaning on RO rejection of NDMA precursors was
completed (in the full-scale RO facility) with data analysis underway.
Future
• R&D will pursue a more aggressive task completion schedule to “catch up” on the grant schedule
given that the offline HPLC-PR-CL instrument is now available again. This includes conducting
high frequency NDMA and NDMA precursor sampling for four separate sampling events with
additional corresponding DBP analysis by USC laboratory partner.
• R&D will conduct the second major UV/AOP pilot testing event in summer, comparing alternative
AOP oxidants to hydrogen peroxide, for which samples are sent to partner labs (UNR/UC and
SDSU) for testing.
Project: Securing the Future of Direct and Indirect Potable Reuse: NDMA
Formation Pathways and Precursors
R&D Staff Contacts: Megan Plumlee
Start Date/Expected Completion: Jan 2018 to Sept 2019
External Funding: Yes (NSF GOALI / WRF)
Professor David Hanigan at the University of Nevada, Reno (UN Reno) together with District R&D
Department staff were awarded a grant from the National Science Foundation (NSF) to fund research
related to N-nitrosodimethylamine (NDMA) precursors at the Groundwater Replenishment System
(GWRS). The overall goal of the NSF study is to understand how NDMA formation occurs in advanced
treated, finished water from GWRS despite effective removal of NDMA and most of its precursors during
advanced treatment. Specific aims include 1) determine the reactivity of known precursors; 2) evaluate
whether chemical additions during advanced treatment may contribute to the formation of NDMA; 3)
identify whether the UV/advanced oxidation process may result in transformation products that are NDMA
precursors (i.e., conversion of unreactive organic nitrogen to reactive, NDMA precursors); 4) characterize
changes in bulk chemical characteristics of the NDMA precursor pool during advanced water treatment.
The aims will be investigated using novel mass spectrometric and separations techniques pioneered by
members of the research team. This work will be a continuation of a previous project collaboration
between Professor Hanigan and his students with OCWD R&D staff on NDMA.
Project Updates
Current
• UNR PI held kick-off project meeting (teleconference).
• Related to, but unique from, a similar USBR grant task described in the above project, UNR is
completing analysis of various chemicals used for water treatment at the OCWD AWPF for their
potential contribution of NDMA precursors to the finished product water. It is largely expected that
this work will rule out this possible contribution.
R&D Project Update Report Q1 2019
Page 7
• Coordination is ongoing to create an OCWD subcontract as part of the NSF grant with Shannon
Roback, formerly R&D Department Postdoctoral Research Associate and now professor at
California State University at Dominguez Hills, such that Dr. Roback can complete research tasks
and leadership for the project (as a Co-PI) and accordingly receive funding from the grant.
Future
• Current tasks are largely led by UNR and do not involve OCWD. OCWD is participating in
periodic team meetings led by the UNR PI. OCWD tasks are not expected until later in ~2020.
Project: Characterization of NDMA Precursors in an Advanced Water Treatment
Facility Using the Polarity Rapid Assessment Method (PRAM) and Ultrafiltration
R&D Staff Contacts: Megan Plumlee
Start Date/Expected Completion: Jan 2018 to Winter 2019
External Funding: No
The primary objective of this collaborative study with UCLA is to use a polarity rapid assessment method
(PRAM) and ultrafiltration (UF) method to characterize the polarity and molecular weight distribution of the
bulk NDMA precursors as they travel through the AWPF. The project will evaluate structural changes in
precursors of NDMA during advanced treatment for potable reuse. For example, polarity characterization
of NDMA precursors via PRAM may demonstrate an increase in the percent of precursors that are polar
after RO treatment, coinciding with the overall significant decrease in precursor concentration via RO.
This information will be useful to understanding the character and fate of precursors through treatment,
which may be helpful in the design of new treatment systems or development of new technologies. For
example, the type of membrane used in AWPF could be chosen based on its ability to remove chemicals
of a certain character that may be more likely to form NDMA (e.g. non-polar and/or positively charged)
chemicals. This work will be completed under the direction of Dr. Mel Suffet of UCLA with sampling,
oversight of the method, and results analysis by R&D staff.
Project Updates
Current
• One of two sampling events was completed in 2018 in which UCLA extracted samples using
specialized PRAM extraction cartridges. Sample analysis of extracts by R&D was delayed due to
HPLC-PR-CL being offline. Now that it is online, in this period the samples were analyzed
(despite their potential expiration).
• Project team met to review first event results. Much of the interpretation and coordination is being
led voluntarily by Prof. Shannon Roback of CSUDH who has experience working with UCLA
PRAM methods. Data suggests that expiration may not have been an issue, but nevertheless it is
important to confirm the results in a second sampling event.
R&D Project Update Report Q1 2019
Page 8
Future
• UCLA in coordination with R&D will collect AWPF samples for a second (final) PRAM extraction
event.
• A final report will be completed by UCLA.
• A publication will be authored describing the findings, pending results. Findings will be reviewed
to determine whether follow up work is worthwhile which has been considered as part of the
scope of the above described NSF grant led by UNR.
Pilot Treatment Studies – Product Evaluations
Project: Low-Pressure Membrane (MF and UF) Pilot Scale Product Evaluation for
AWPF
R&D Staff Contacts: Han Gu
Start Date/Expected Completion: 2015 to 2019
External Funding: No
This project evaluates alternative low-pressure membrane products (i.e., microfiltration [MF] and
ultrafiltration [UF] membranes) for the GWRS to support a product selection decision for the 30-mgd
GWRS Final Expansion (FE). GWRSFE engineering design began in Fall 2017. Long-term piloting
evaluations for UF products are currently underway at the OCWD Engineering Research Center (ERC) as
well as at OCSD Plant No.2. Testing at OCSD Plant No. 2 is necessary because effluent from this plant
will be a new water source for the AWPF as part of the GWRSFE. Manufacturers include Evoqua Water
Technologies, GE Water and Process Technologies, Toray Industries, Inc. and Scinor North America.
Identifying suitable products will provide staff with options for replacing existing AWPF membranes and
for the GWRS FE. Most evaluations have already been completed to meet the design schedule for
GWRSFE but additional confirmation and chemical optimization via pilot testing for certain products is
continuing in FY 2018-19 and FY 2019-20. Based on positive results of the R&D piloting, Scinor UF
membranes and later Evoqua UF membranes were installed in two full-scale MF cells (E04 and E03) at
AWPF for further evaluation led by the Engineering Department. Operational testing for Scinor
demonstration cell is underway and began Q3 2018. Operational testing for Evoqua demonstration cell is
underway and began Q1 2019.
Project Updates
Current
• Pilot product evaluations at OCSD Plant No. 2 this period included a polyvinylidene fluoride
(PVDF) UF membrane from Scinor and a “next generation” PVDF module from Evoqua (same
module length as current Evoqua MF membrane at AWPF).
o Virus and bacterial removal ability of the two UF products were characterized in a water
quality sampling campaign in Q4 2018 to Q1 2019.Product evaluations at the ERC this
period included the same next generation PVDF UF membrane from Evoqua that is being
tested at Plant No. 2 (installed on Evoqua MF pilot 1 and 2).
• Previously completed product evaluations at the ERC included UF (PVDF) membranes from
Evoqua, Toray, Scinor and GE. Previously completed product evaluations at OCSD Plant No. 2
included the Evoqua MF membrane currently used at AWPF (Evoqua polypropylene membrane),
R&D Project Update Report Q1 2019
Page 9
a longer module MF membrane from Evoqua (polypropylene), a longer module UF PVDF
membrane from Evoqua, and a Toray UF membrane.
Future
• Pilot testing of UF products will continue, for the Scinor UF membrane and the Evoqua (next
generation PVDF) UF membranes at Plant No. 2.
• Summary evaluation reports will be prepared for each product.
Program: RO Antiscalant Pilot Scale Product Evaluation for AWPF
R&D Staff Contacts: Han Gu
Start Date/Expected Completion: 2008 - ongoing
External Funding: No
The AWPF RO system requires chemical addition, antiscalant and acid, to the feed to prevent the
precipitation of sparingly soluble minerals which foul the membranes. Identifying the appropriate
antiscalant product, dosage and feed water pH through pilot testing is an ongoing program. R&D
continues to test newly available antiscalants, as well as operating conditions (dose and pH), to identify
preferred products and minimum required doses via pilot-scale testing at the ERC using RO pilots.
Antiscalant products found to be effective through these efforts are short-listed for bidding through the
District’s procurement process. This program has resulted in cost-savings totaling in excess of
$1,000,000 annually.
Project Updates
Current
• For monitoring purposes as a longer term test, the AWC A-108 trial (at a dose of 2.5 mg/L and pH
6.9) was extended past the typical six-month to 1 year antiscalant pilot evaluation period,
because the product was selected for usage in GWRS.
• The Avista Vitec 1500 trial (at a dose of 2.5 mg/L and pH 6.9) was concluded in October 2018.
Avista provided an autopsy for the lead and tail elements of the pilot.
Future
• R&D staff will complete an internal report for the parallel re-trial of the AWC A108 and Avista
Vitec 1500 antiscalant product trial results.
Program: RO Membrane Product Evaluations for AWPF (Satellite Vessels)
R&D Staff Contacts: Han Gu
Start Date/Expected Completion: 2009 - ongoing
External Funding: No
Commercial RO membrane products continue to be developed by manufacturers which have potential for
significant benefits in terms of enhanced permeability and rejection. Products for the AWPF are
continuously evaluated by R&D through conducting long-term testing (~12 months) using a series of eight
test vessels (satellite vessels) located in the AWPF RO facility. Products deemed successful are short-
R&D Project Update Report Q1 2019
Page 10
listed for future membrane procurements. The goal is to expand the list of pre-qualified products to
create a competitive environment within the District’s procurement process.
Project Updates
• Currently, products being evaluated include Toray TLF-400DG and Hydranautics ESPA4-LD.
• LG Chemical BW 400 was selected as RO Train A replacement membrane based on testing
performance and cost. R&D is continuing to operate this product in the satellite vessel to develop
a longer term dataset.
• Membrane cleaning and water sampling was completed for Hydranautics ESPA4-LD to evaluate
impacts of chemical cleaning.
Future
• The above evaluations will continue, and in some cases qualified products will be left in place to
collect longer-term data in the event there is no other product competing for that position/testing.
• A final report was prepared for LG Chemical BW 400 ES (Fall 2018).
Pilot Treatment Studies – Research & Optimization
Project: Improving MF Treatment and Energy Efficiency through Monitoring and
Removal of Colloidal Particle Foulants
R&D Staff Contacts: Jana Safarik
Start Date/Expected Completion: Summer 2015 to Spring 2019
External Funding: Yes (California Energy Commission)
OCWD is one of two demonstration sites for this $1.2 million study, led by Kennedy/Jenks Consultants and
funded by the California Energy Commission (CEC). The other demonstration site is West Basin Municipal
Water District. The objective of the project is to improve the energy efficiency of low pressure membrane
treatment (e.g., MF) of recycled water through on-line monitoring and removal of colloidal particles that
cause fouling. The colloidal particle monitoring is conducted using Malvern Instruments Nanosight NS500.
OCWD is being reimbursed up to $40,000 through the grant funding for equipment/supplies related costs.
R&D is providing project support via provision of Engineering Research Center pilot equipment and staff
time for pilot operational support, project experimental design, membrane autopsies, and other analysis.
Project Updates
Current
• The project was completed on 03/29/19. A draft final report was submitted to CEC for review.
Future
• A final report will be submitted to CEC.
• The project team will prepare manuscripts for journal publication.
R&D Project Update Report Q1 2019
Page 11
Project: Evaluation of Peroxide Disinfectants as Biofouling Controls Agents in an
MF/RO Treatment System
R&D Staff Contacts: Jana Safarik, Megan Plumlee
Start Date/Expected Completion: 2018 - 2020
External Funding: No (OCWD funding to Dr. Martin Reinhard)
This project is in collaboration with Dr. Martin Reinhard (Professor Emeritus of Stanford University).
GWRS feed water contains significant quantities of membrane fouling materials, including
nanoparticulates, bacteria, microbial detritus and dissolved organic matter impairing the performance of
the MF and RO systems. To mitigate RO biofouling, but also providing an oxidative benefit to MF,
monochloramine (MCA) is used as a biocide and antifouling agent in the District AWPF. In the AWPF,
MCA is formed by reacting sodium hypochlorite with ammonia in the secondary effluent (AWPF
feedwater, i.e., Q1 water). The use of MCA may be problematic because it can cause oxidative damage
to the polyamide separation layer of RO membranes, and forms nitrosodimethylamine (NDMA) and other
disinfection by-products (DBPs). To avoid membrane and environmental impacts caused by chlorine,
employing non-chlorine based disinfectants may prove to be beneficial. The goal of this project is to
assess the feasibility and potential benefits of using hydrogen peroxide (H2O2) alone or in combination
with paracetic acid (PAA) as a disinfectant and an antifouling agent for MF and RO. H2O2 and PAA are of
interest because they don’t produce toxic by-products, are relatively inexpensive and are available in
liquid form. This study will evaluate UF and RO performance, at pilot-scale, under the different
disinfectant regimes dosed to UF feed. The current AWPF sodium hypochlorite dosing regimen will also
be tested for comparison (as a control).
Project Updates
Current
• A potential supplier, PeroxyChem, of a PAA/ H2O2 product completed stability and disinfection
tests using Q1 feed water.
• AWC completed compatibility testing between their AWC A-108 antiscalant (used in GWRS) and
the PeroxyChem product. No compatibility issues were observed.
• Pilot control runs using sodium hypochlorite as a disinfectant (control) continued during this
quarter. The membranes used in the pilots are Evoqua S10N UF membranes and Hydranautics
ESPA2-LD RO membranes.
• Design of PAA/H2O2 UF-RO pilot system was completed.
Future
• R&D staff will complete the sodium hypochlorite pilot tests (control).
• The project team will begin H2O2 and PAA pilot tests.
R&D Project Update Report Q1 2019
Page 12
Program: Assessing and Ensuring Effective Antiscalant Treatment via Real Time
Online Membrane Monitoring (MeMo™)
R&D Staff Contacts: Han Gu, Megan Plumlee
Start Date/Expected Completion: 2018 - 2019
External Funding: No
The existing OCWD RO Pretreatment Chemical Program qualifies antiscalants to continuously identify
products that may improve the operation and cost effectiveness of mineral scaling suppression in the
AWPF RO units. The program involves evaluating candidate antiscalants using RO pilot systems at the
OCWD Engineering Research Center (ERC), operated to simulate the full-scale RO units in the GWRS.
The current program strategy is to test a given antiscalant type and dose over an extended period (at
least 6 months) to evaluate whether significant permeability decline occurs within that period. However,
permeability decline is an indirect measure of membrane scaling/fouling. It is possible that a significant
degree of mineral scaling/fouling may occur before permeability decline can be detected with sufficient
resolution. Early warning can be critical in plant operation for providing operators with enough time to
adjust operating conditions. The goal of this 12-month project is to test the application of Noria’s real-time
membrane monitor (MeMo™) to improve the existing OCWD RO Pretreatment Chemical Program.
MeMo™ uses online, direct membrane surface imaging to track surface coverage and permeate flux
changes. In this manner, MeMo™ can be used to quickly assess a range of antiscalant doses (i.e., within
a few weeks) and determine the minimum required dose for effective suppression of membrane mineral
scaling/fouling in pilot RO trials.
Project Updates
• A MeMo™ unit was installed on the concentrate line of RO pilot #2 at the ERC in late October
2018 where it serves to monitor tail-end element fouling.
• As part of the experimental plan (Phase I), the antiscalant dose to the pilot was reduced step wise
from 2.5 ppm to no antiscalant. Based on online determination of surface fouling coverage of the
membrane in MeMo™, no significant fouling was detected down to an antiscalant dose of
1.75 ppm. After reducing the antiscalant dose from 1.75 to 1.25 ppm, surface fouling coverage
began to increase above 5%, indicating the onset of progressive fouling. With antiscalant dosing
terminated, surface fouling coverage continued to increase rapidly. Based on the above results,
the minimum antiscalant dose appears to be in the range of 1.25-1.75 ppm. Ongoing testing is
being performed to repeat/confirm the findings.
Future
• Noria Water recommended the continuation of Phase 1 with antiscalant dose of 1.75 ppm. It is
recommended to operate at this condition for 1 month to confirm continuous effectiveness of
antiscalant fouling suppression.
R&D Project Update Report Q1 2019
Page 13
Project: Desalitech Closed Circuit Reverse Osmosis (CCRO) Pilot Study for Water
Recovery from RO Concentrate
R&D Staff Contacts: Han Gu
Start Date/Expected Completion: Fall 2016 to Fall 2019
External Funding: No
The District discharges 18 million gallons per day (MGD) of concentrated reject water from the AWPF RO
process to the OCSD ocean outfall, and this will increase to up to 23 MGD once the Final Expansion is
complete. With additional treatment, the RO concentrate waste stream represents a significant new
source of water for the District. Technologies with sufficient potential to warrant evaluation include closed
circuit reverse osmosis (CCRO; in previous reports referred to as closed circuit desalination, CCD),
forward osmosis, and conventional RO (as a fourth stage) or similar alternative such as high efficiency
RO (HERO). OCWD purchased a pilot CCRO system from Desalitech to evaluate the potential of CCRO
to treat RO concentrate for water recovery. CCRO is a newly developed, RO-based water treatment
process that is patented by Desalitech, Inc. It consists of standard RO membranes and equipment, but is
operated in a semi-batch mode, in which concentrate produced by the CCRO system is recirculated back
to the feed water side until the desired water production is reached, at which time the concentrate is
discharged from the system and replaced with feed water to begin again. Jacobs is providing technical
support for the study. The CCRO pilot unit is in the RO building.
Project Updates
Current
• Phase 2 of the pilot test began March 2018 and is still ongoing, extended to coincide with the
USBR funded project described next. The pilot is currently treating GWRS AWPF RO concentrate
while using GWRS AWPF RO feed as source water to refill the side conduit at the end of each
CCRO cycle. Two long term demonstration trials in ROC + ROF mode yielded about two months
of continuous run time between chemical cleanings, considered a significant improvement and
consistent with project/OCWD goals to conduct CIPs no more than monthly, or ideally, only every
other month, in the case of a full-scale CCRO implementation.
• Instead of running at a preset maximum recovery, the pilot is operated in a variable recovery
mode where the cycle-to-cycle recovery is controlled by both the maximum CCRO concentrate
conductivity set point (which is directly related to the feed conductivity and temperature) and
maximum recovery setpoint. To date, volume-based average overall permeate recovery of the
CCRO pilot is 90.6%.
Future
• Pilot operational feasibility and recovery optimization will continue in coordination with the USBR-
funded scope of work (described below). Since the USBR scope includes water quality sampling
over multiple events, the pilot will be operated in a consistent fashion (such that the events are
replicates), but further operational optimization could be considered following completion of the
USBR study.
• The project team will generate a final report in order to complete the Desalitech-Jacobs scope of
work, which was defined prior to obtaining a related USBR grant (below).
R&D Project Update Report Q1 2019
Page 14
Project: Porifera Forward Osmosis Pilot Study for Demonstration of dprShield
Technology in RO Concentrate Treatment
R&D Staff Contacts: Han Gu
Start Date/Expected Completion: Jan 2018 to ~Spring 2019
External Funding: No (CEC funding to Porifera)
As described above for the Desalitech CCRO pilot study, the RO concentrate waste stream represents a
significant new source of water for the District. The existing RO system removes most emerging
contaminants, which are concentrated in this ROC stream to higher concentrations than the RO feed
(ROF) stream. Therefore, robust treatment is important prior to potable reuse. The California Energy
Commission (CEC) has provided funding to test dprShield technology as part of the Porifera forward
osmosis (FO) technology demonstration at pilot scale at the GWRS with the intent to demonstrate
dprShield and FO as innovative technologies to use less energy and reuse more water during potable
reuse. dprShield is a new technology that combines FO and RO treatment processes with a type of real-
time integrity monitoring and rejection mechanism called Breach-Activated Barrier™. OCWD is a partner
site in the CEC funded project. The FO-RO pilot unit is in the RO building.
Project Updates
Current
• Porifera staff in collaboration with R&D staff are working to optimize system configuration. The
objective is to adjust and optimize pilot performance and to determine appropriate maintenance
requirements. The pilot commissioning was extended to Q3 2018 due to multiple issues including
off-spec membranes, leaking valves, etc. The RO membrane performance issue (low salt
rejection) previously thought related to the marker (dye) was due to a faulty permeate conductivity
probe. A new probe was installed on the pilot and the RO permeate conductivity was measured in
the normal range.
• The Porifera team in collaboration with Stanford University partners on their CEC grant conducted
water quality sampling in Q3 of 2018.
Future
• The cleaning frequency of both the FO and RO membranes is more frequent with the dye
present. Additional testing was performed at Porifera’s facility to determine if the dye alone is the
likely cause of membrane fouling during pilot testing. The fouling has not been repeatable on
synthetic feed solutions which indicate that it may be site specific. Samples from the fouled
membranes have been sent for lab testing to troubleshoot the issue.
• Long term operation of the pilot at 27% system recovery is ongoing to evaluate the FO-RO
system performance.
• The Porifera pilot will be evaluated as part of the USBR-funded scope of work (described below).
Project: Increasing Potable Water Recovery to >95%: Pilot Evaluation of Closed
Circuit Reverse Osmosis (CCRO) and Forward Osmosis (FO) Alternatives for
Concentrate Treatment
R&D Staff Contacts: Han Gu
Start Date/Expected Completion: Spring 2018 to Fall 2019
External Funding: Yes (USBR DWPR grant)
The R&D Department is evaluating closed circuit reverse osmosis (CCRO – Desalitech) and forward osmosis (FO - Porifera) at pilot-scale to further treat and reuse a portion of the OCWD RO concentrate (ROC) reject stream that is currently discharged to the ocean. This project builds on the CCRO and FO studies described above, and uses USBR grant funding to evaluate the water quality of the product water produced by each of these systems as well as to complete other tasks. Successful treatment and recovery of RO concentrate at advanced potable reuse facilities like GWRS will minimize the volume of the waste stream while generating more water, increasing overall facility water recovery (plant efficiency) from 85% to greater than 90 or even 95%. Using the pilot operational feasibility and optimization completed previously (see above project descriptions for each technology), this study will focus on pilot performance with respect to water quality, treatability, and acceptance for potable reuse. The study will include comprehensive water quality testing of the product water for chemical constituents and microorganisms, determination of virus log removal via seeding studies with MS2 coliphage, confirmation of suitability of the product waters for subsequent UV/AOP treatment, and cost analysis that will be completed by Carollo Engineers in collaboration with R&D staff.
Project Updates
Current
• The first comprehensive chemical water quality analysis of permeate from CCRO and FO pilots were completed in Q1 2019.Initial data review for the CCRO pilot indicates good permeate water quality; FO-RO data is not yet reviewed.
• Carollo team analysis is ongoing for CCRO and FO-RO cost/footprint estimate, which requires development of process flow diagrams and coordination with the technology providers.
Future
• The second and third comprehensive chemical water quality sampling events for permeate from CCRO and FO pilots will be completed in Q2 2019. A subset of the events will include pilot feed water characterization.
• Cost and physical footprint evaluation of each technology (CCRO and FO-RO) will be completed by Carollo.
• Assessment of technology virus removal will be completed via MS2 coliphage spiking (challenge test) into the pilot feed.
• UV/AOP pilot studies will be conducted to evaluate suitability of UV/AOP for treatment of CCRO and FO product water.
Project: Utility Validation of Alternative Method for NDMA Analysis
R&D Staff Contacts: Megan Plumlee, Ken Ishida
Start Date/Expected Completion: Fall 2017 to Spring 201p
External Funding: Yes (WRF)
This project is funded by WRF to validate a novel NDMA benchtop analysis method that requires less
time, cost, and sample volume, and has potential for online (real-time) use. The method was developed
by Professor Hitoshi Kodamatani (Kagoshima University, Japan) and has been adapted to recycled
waters (Professor Takahiro Fujioka, Nagasaki University, Japan). Professors Kodamatani and Fujioka are
advisors on the WE&RF study and have loaned OCWD the prototype detector. R&D staff obtained and
repurposed a high performance liquid chromatography (HPLC) instrument that was no longer needed by
the OCWD AWQAL. The method couples the HPLC with automated photochemical reaction (PR) and
chemiluminescence (CL) detection of NDMA and other nitrosamines. The HPLC-PR-CL method is able to
quantitate NDMA to approximately 2 ng/L. Through this study, the method will be tested for
reproducibility, detection limit, matrix interference, and will be compared to AWQAL split sample results.
Project Updates
Current
• The draft final report was reviewed by the PAC and returned to OCWD. R&D staff and
Dr. Shannon Roback addressed the PAC’s comments and made corrections to the report. The
final report was submitted to WRF for publication by WRF.
Future
• The WRF final report on the validation of the HPLC-PR-CL method for NDMA quantitation will be
made available to WRF subscribers and the water reuse industry.
• A manuscript will be drafted for journal publication to describe the overall method validation.
R&D Project Update Report Q1 2019
Page 17
Advanced Treatment Processes
Project: Determination of Enteric Virus Log Reduction Values (LRVs) from Orange
County Sanitation District Plant No. 1 and No. 2
R&D Staff Contacts: Jana Safarik, Julio Polanco
Start Date/Expected Completion: Spring 2018 – Winter 2020
External Funding: No
R&D will lead a study partnered with the Orange County Sanitation District (OCSD) to evaluate the
OCSD’s Plant No. 1 and Plant No. 2 facilities for enteric virus concentrations in raw wastewater and
secondary treated effluents, in order to determine log removal values (LRVs). LRV is a measure of the
percent removal, in this case for viruses during wastewater treatment. The study will provide information
and data for determining LRVs to be applied toward the pathogen control requirements for OCWD’s
GWRS facility, found in Groundwater Recharge Reuse Project (GRRP) regulations adopted into Title 22.
It will also provide valuable information on the concentration of human viruses in OCSD’s raw water. The
study objectives are to determine the concentration of enteric viruses and specific microbial indicators in
OCSD’s raw wastewater influent at both OCSD’s plants, to determine the concentration of the same
enteric viruses and microbial indicators in OCSD activated sludge effluents (Plant No. 1), trickling filter
effluent (Plant No. 1), and trickling filter/solids contact effluent (Plant No. 2), perform a final statistical
analysis to determine the LRV for each process, and finally to recommend an overall LRV “credit” to be
assigned to the wastewater treatment process that occurs upstream of the AWPF. With regulatory
approval, this could be applied toward the AWPF potable reuse requirements for virus removal (total of 12
logs of virus removal required from raw OCSD influent to AWPF finished product water).
Project Updates
Current
• Work is ongoing to revise the draft test plan, prepared for the State Water Resources Control
Board - Division of Drinking Water (DDW) and previously reviewed by the National Water
Research Institute (NWRI) GWRS Independent Advisory Panel, Microbiological Subcommittee, in
order to address two rounds of DDW comments that have been received.
• Michigan State University (MSU) provided ongoing support to R&D staff regarding edits to the
test plan. A significant addition was the expansion of analyses to include Droplet Digital PCR
(ddPCR).
• R&D staff were notified that two separate proposals for grant funding for this project were both
successful – these are grants from the Metropolitan Water District (MWD) Future Supply Actions
Program and WRF Subscriber Priority Program.
• R&D staff are completing ongoing preparation for the first sampling event (e.g., sampling site
visits, construction of support apparatus for sampling, ordering supplies) with support from Mark
Greening of Water Quality Department.
R&D Project Update Report Q1 2019
Page 18
Future
• R&D staff will finalize the test plan and submit to DDW, then begin a one-year long virus
monitoring program at OCSD Plant No. 1 and No. 2.
Project: Characterization of AWPF Feed Water
R&D Staff Contacts: Jana Safarik
Start Date/Expected Completion: 2017 - ongoing
External Funding: No
The feed water for the AWPF is a combination of trickling filter (TF) and activated sludge effluent (ASE) from the Orange County Sanitation District (OCSD) Plant No. 1, which possesses significant particulate loading and effluent organic matter (EfOM). The addition of SEFE tanks (secondary effluent flow equalization) into AWPF in 2015 may also have associated water quality issues for the feed water stream. The SEFE tanks at the AWPF are upstream of the introduction of TF effluent and thus contain only ASE. Both the SEFE volume and TF:ASE ratio are dependent on OCSD’s day to day operational parameters. These factors can contribute to rapid fouling of MF membranes with consequent loss of performance. Previous studies (Safarik, 2005, 2012) revealed that much of the material responsible for MF fouling appears to be biological debris. Carbohydrate, protein, and lipids were all identified on the surface and membrane matrices of fouled MF membranes. Much of the previous work was completed with ASE as the feed water. The aim of this project is to further elucidate and improve our understanding of the nanoparticulate and organic character of the foulants found in EfOM of AWPF feed water and their effect on MF fouling. Samples of ASE and TF from Plant No. 1 and the SEFE tanks will be characterized by three-dimensional excitation-emission matrix (EEM), nanoparticle size and distribution as well as other laboratory assays such as polysaccharide and protein. Project Updates Current
• Monthly AWPF feedwater grab samples were collected to measure fluorescence (EEM).
• Nanoparticle analysis was not performed due to lack of availability of a nanoparticle analyzer.
Future
• Monthly grab samples of AWPF feed water fractions will continue to be collected and analyzed for fluorescence (EEM).
Project: Cartridge Filter Performance Evaluation using Rapid ATP Assay
R&D Staff Contacts: Jana Safarik
Start Date/Expected Completion: 2015 - ongoing
External Funding: No
Begun in 2015 in collaboration with Water Production Department (WP), R&D will continue monitoring the AWPF cartridge filters (CF) water quality for levels of adenosine triphosphate (ATP) as a surrogate for microbial activity using the Rapid LuminUltra Technologies kit method. Increased ATP levels in the CF effluent (RO feed water) has been found to serve as a good indicator of RO biofouling potential. Bacterial growth in the CFs can result in decreased RO feed water quality, increased pressures in CF vessels, and decreased RO membrane performance. The results from this study helped to develop a Water Production
R&D Project Update Report Q1 2019
Page 19
(WP) Department SOP for CF maintenance. When CF differential pressures (dP) begin to rise, WP initiates individual CF vessel chlorine soaks and flushes. The purpose of the chlorine soaks is to reduce microbial activity inside the CF vessels. The CF vessels are flushed after a 2-hr chlorine soak to remove the inactivated microbial biomass. Based on this study, additionally staff developed and implemented new operational procedures to perform deadhead flushes of the CF system after plant shutdowns immediately prior to plant startups. The flushes move loose filter material (microbial biomass) out of the system to waste before bringing the plant online, preventing the material from reaching the RO membranes. R&D will continue measuring and providing this data to Operations staff.
Project Updates
Current
• No R&D activity for this period.
Future
• As needed, R&D will continue measuring and providing ATP data from CFs to Operations staff.
Project: Novel Online Surrogates to Monitor Reverse Osmosis Performance in
Reuse Applications
R&D Staff Contacts: Jana Safarik, Megan Plumlee
Start Date/Expected Completion: Spring 2018 to Winter 2020
External Funding: Yes (USBR DWPR grant)
Reverse osmosis (RO) is a widely accepted treatment technology in reuse scenarios, serving as a physical barrier to pathogens and most dissolved constituents. However, for potable reuse, pathogen removal credit for RO systems is dependent upon proving continuous integrity of the membranes, usually through online monitoring of a surrogate for virus rejection. Traditional surrogates, such as total dissolved solids and total organic carbon, demonstrate 1-2 logs of removal credit. These values are much lower than the 6 logs of virus removal demonstrated by RO in past studies. In order to obtain greater log removal credits, new surrogates are necessary. This project aims to identify better surrogates that can be measured with practical online monitors to enable continuous monitoring of RO performance for reuse scenarios, where demonstrating pathogen log removal is critical to public health. The proposed surrogates will be compared to the TOC and conductivity removals and ranked based by highest to lowest log removal by RO. The following surrogates will be tested: fluorescence of dissolved organic matter, ATP, nanoparticles, sulfate ion, and phosphate ion. These are already present in the RO feed water, thus spiking is not required. Surrogate monitoring will be done on a 5-MGD RO train in the AWPF RO facility. Online instrumentation will be installed on the feed and permeate sides.
Project Updates
Current
• One EZ-ATP instrument was installed on the RO feed water of a 5-MGD RO unit in the RO
facility. A second unit was installed on the RO permeate to allow paired free ATP monitoring for
calculation of continuous ATP removal by RO.
R&D Project Update Report Q1 2019
Page 20
• Preliminary tests showed a log removal value (LRV) of ≥2.5 could be achieved across the RO
based on free ATP monitored using one EZ-ATP instrument. The data also showed a diurnal
pattern where RO feed and permeate free ATP spiked between 10 am and 2 pm each day.
• Both AZ-ATP analyzers had to be returned to the manufacturer (Hach) due to Hach urgent
request, shortening the expected duration of sampling data desired for this study.
• Grab samples for sulfate and strontium were collected with enough frequency to determine
diurnal fluctuations and any corresponding changes in log removal, simulating the use of an
online monitoring system (i.e., for sulfate). Autosamplers were used to collect hourly grab
samples. Same-day laboratory analysis of paired RO feed and RO permeate demonstrated 2.5 –
3 logs of sulfate removal and 3 – 3.4 logs of strontium removal. Based on grab sampling, these
ions were identified as potential surrogates since they are present in the AWPF feedwater at high
enough to concentrations to quantify a relatively large removal across the RO membranes.
Future
• R&D staff will explore options with Hach to obtain another EZ-ATP analyzer, such as discounted
rental or purchase. Relatedly, R&D will work with Hach scientists to determine the feasibility of
using one ATP instrument to analyze both ROF and ROP measurements.
• R&D staff will schedule a weekend and midweek 24-hr sampling event for sulfate and phosphate
ions to further measure water quality diurnal and daily variations.
Project: UV/H2O2 Characterization and Optimization Studies
R&D Staff Contacts: Ken Ishida
Start Date/Expected Completion: 2008 - ongoing
External Funding: No
During UV/AOP treatment, UV irradiation and HO• radicals derived from hydrogen peroxide (H2O2) are
not solely responsible for bringing about oxidation; combined chlorine species (mono- and di-chloramine)
present in the UV/AOP feed water may also play a significant role. R&D continues to investigate removal
of 1,4-dioxane at varying H2O2 and combined chlorine levels utilizing the onsite UV/AOP pilot reactor
under conditions that simulate the operation of the full-scale UVPhox. Studies focus on identifying the
conditions for which optimal 1,4-dioxane removal occurs, based on past data suggesting synergistic
effects of chloramine and H2O2. This project overlaps significantly with ongoing partner studies with
University of California, Riverside (UCR) described below and CSULB and involves experiments
coordinated with the university partner studies.
Project Updates
Current
• Work over this period has been tied to R&D’s collaboration with Professor Haizhou Liu at UCR
and the study of UV/monochloramine AOP. Postdoctoral research Dr. Kiranmayi Mangalgiri, and
graduate students Sam Patton and Liang Wu, have conducted UV pilot reactor experiments with
assistance from R&D staff (see next project below.)
R&D Project Update Report Q1 2019
Page 21
Future
• R&D staff continue to conduct pilot experiments in collaboration with graduate students and post
doc from Dr. Liu’s research group at UCR tied to NSF and USBR research grants (see next
project below).
Project: Kinetics Modeling and Experimental Investigation of Chloramine
Photolysis in Ultraviolet-Driven Advanced Water Treatment
R&D collaborated with California State University, Long Beach (CSULB) to install a fiber optic distributed
temperature sensing (FODTS) system to monitor percolation rates at La Palma Basin. This basin was
constructed in the Fall of 2016 and is exclusively dedicated to the recharge of GWRS advanced treated
recycled water. The FODTS technology utilizes heat as a tracer of infiltration and provides improved
resolution of percolation rates throughout the study site compared to traditional water balance methods.
By tracking spatial and temporal variations of infiltration rates across the basin, FODTS can reveal
specific areas where clogging occurs and help optimize operations by improving cleaning strategies
which enhance long-term basin performance. R&D has evaluated the first year and a half of data and will
continue collecting data to help develop a long-term dataset, identify regions of higher or lower
percolation, and evaluate FODTS’s utility for improved basin management (e.g., cleaning). The project
will likely transition to a long-term study because the FODTS system has been permanently installed at La
Palma Basin, enabling continued evaluation of data over time.
Project Updates
Current
• OCWD staff analyzed data for the first two years of the La Palma basin operations. Results show
dynamic spatial-temporal changes in infiltration rates throughout the basin. Regions with
generally high infiltration rates and regions with generally low infiltration rates were identified.
Further data analysis is ongoing.
• Four autonomous temperature loggers (Onset HOBO loggers) were deployed and installed on the
south sub-basin to estimate infiltration alongside the surface cable, as a potential replacement to
the use of surface FODTS for measuring surface water temperature. Preliminary results
R&D Project Update Report Q1 2019
Page 28
suggested that two loggers on each basin does not offer enough spatial resolution to obtain
accurate infiltration rates to replace surface FODTS. Further evaluation is ongoing.
• In this period R&D conducted a basin-wide experiment to understand the effectiveness of
different cleaning strategies, as a demonstration / evaluation of one of the proposed potential
uses of FODTS for MAR applications. R&D and Recharge Operations staff worked to clean the
north sub-basin (west-side near the pumphouse and the northeast corner) by removing only the
top layer (algal/clay chips). The south sub-basin remained uncleaned. Data is currently being
evaluated to understand the effect different cleaning strategies have on the short- and long-term
infiltration rates of the basin.
• R&D staff presented the findings from the ‘Targeted Cleaning Experiment’ (described above) at
the WateReuse Annual California Conference held on March 17-19 in Garden Grove, CA.
Future
• R&D staff will evaluate the feasibility of using autonomous temperature loggers to replace the
surface cable. R&D staff will develop a method to incorporate data from multiple loggers into the
FODTS algorithm.
• R&D will continue collecting temperature data using paired fiber optic cables (subsurface-surface)
and autonomous temperature loggers. Data collection and analysis is ongoing. Staff will process
FODTS data to evaluate infiltration changes over long periods of time.
• The project team will prepare publications related to this project.
Reporting Period Publications
Shannon L. Roback, Imma Ferrer, E. Michael Thurman, Kenneth P. Ishida, Megan H. Plumlee, Andrew Poustie, Paul Westerhoff, and David Hanigan. Non-Target Mass Spectrometry Analysis of NDMA Precursors in Advanced Treatment for Potable Reuse. Environmental Science: Water Research & Technology, 4, 1944-55, 2018. Edwin A. Roehl, David A. Ladner, Ruby C. Daamen, John B. Cook, Jana Safarik, Donald W. Phipps and Peng Xie, 2018. Modeling Fouling in a large RO System with Artificial Neural Networks. Journal of Membrane Science 552, 95-106.
Reporting Period Conference Presentations/Posters
Jason Dadakis, Shannon Roback, Megan H. Plumlee, Hitoshi Kodamatani, Takahiro Fujuika. Rapid Low-Volume Method for N-Nitrosamine Analysis in Recycled Water for Benchtop or Online monitoring (Presentation). SETAC North America 39th Annual Meeting, Sacramento, California, November 4-8, 2018. Elizabeth D. McKenna, Shannon Roback, Imma Ferrer, E. Michael Thurman, Kenneth P. Ishida, Megan H. Plumlee, Andrew Poustie, Paul Westerhoff, David Hanigan. Non-target mass spectrometry analysis of NDMA precursors in advanced treatment for potable reuse (Poster). Nevada Water Environment Association Annual Conference, Reno, Nevada, January 29-30, 2019.
R&D Project Update Report Q1 2019
Page 29
Shannon Roback, Kenneth P. Ishida, Megan H. Plumlee, Yi-Hsueh Chuang, Zhong Zhang, William Mitch. Comparison of UV/hydrogen peroxide, UV/free chlorine and UV/monochloramine for the removal of NDMA and NDMA precursors (Presentation). 2019 IUVA World Congress, Sydney, Australia, February 10-13, 2019. Jana Safarik, Ganesh Rajagopalan, Megan H. Plumlee. Removal of Colloidal Particles Through Online Monitoring to Lower Microfiltration Membrane Fouling (Presentation). MTC19, New Orleans, LA. Feb. 25-28, 2019. Jana Safarik, Megan H. Plumlee, Eileen Y. Idica, Aleks Pisarenko, Rhodes Trussell, Shane Trussell, Rodrigo Tackaert. Adenosine Triphosphate as an Online Surrogate to Monitor Reverse Osmosis Performance and Integrity in Reuse Applications (Presentation). WateReuse California Annual Conference, Garden Grove, CA, March 17-19, 2019. Ganesh Rajagopalan, Jana Safarik, Megan H. Plumlee. Colloidal Particles Removal through Online Monitoring to Lower Membrane Fouling (Presentation). WateReuse California Annual Conference, Garden Grove, CA, March 17-19, 2019. Erik Desormeaux, Olgica Bakajim, Han Gu, Megan H. Plumlee, Yi-Hsueh (Brad) Chuang, William Mitch. DPRShield: Piloting a New Treatment Process to Increase Recovery at OCWD (Presentation). WateReuse California Annual Conference, Garden Grove, CA, March 17-19, 2019. Ricardo Medina, Christine Pham, Megan H. Plumlee, Matthew W. Becker, Patrick J. O’Connell. Use of Distributed Temperature Sensing to Evaluate Groundwater Recharge Basin Cleaning Strategies (Presentation). WateReuse California Annual Conference, Garden Grove, CA, March 17-19, 2019. Megan H. Plumlee, David Hokanson, William Mitch, Scott Fendorf, Jason Dadakis, Shane Trussell. Evaluating Post Treatment Challenges for Potable Reuse Applications (Presentation). WateReuse California Annual Conference, Garden Grove, CA, March 17-19, 2019. Shannon Roback, Kenneth P. Ishida, Megan H. Plumlee, Yi-Hsueh (Brad) Chuang, Zhong Zhang, William Mitch. Comparison of UV/AOP oxidants including free chlorine for the removal of DBPs, their precursors, and DBP-associated toxicity (Presentation). WateReuse California Annual Conference, Garden Grove, CA, March 17-19, 2019.
Participating Utility Projects
OCWD participates in collaborative research with universities and other partners, often facilitated by R&D
staff, in which OCWD provides water samples, data, operating history, and other support as an in-kind
contribution to a partner-led study. In this role, OCWD is referred to as a “participating utility”. Current
projects in which R&D or other District staff are coordinating OCWD participation include the following,
with the OCWD project representative listed:
Water Research Foundation (WRF)
• Building-Scale Treatment for Direct Potable Water Reuse & Intelligent Control for Real Time
Performance Monitoring, WRF 4691 (Megan Plumlee)
• Understanding the Impacts of Wastewater Treatment Performance on Advanced Water treatment
Processes and Finished Water Quality, WRF 17-05 (Mehul Patel and Megan Plumlee)
• DPR-4: Project Description for Treatment for Averaging Potential Chemical Peaks (SWRCB
Direct Potable Reuse [DPR] Research) (Megan Plumlee)
R&D Project Update Report Q1 2019
Page 30
• Integrating Management of Sensor Data for a Real Time Decision Making/Response System,
WRRF 14-01 (Mehul Patel and Megan Plumlee)
• Considerations and Blending Strategies for Drinking Water System Integration with Alternative
Water Supplies, WRF 4953 (District contact TBD / Mehul Patel and Megan Plumlee)
United States Geological Service (USGS)
• “Hydrodynamic Enhancement of Nitrate Attenuation by Integrating Reactive Biobarriers into
Shallow, Open Water Treatment Wetlands”. PI: Josh Sharp, Colorado School of Mines. (Christine
Pham and Megan Plumlee)
National Science Foundation
• National Science Foundation CAREER: “Grid Symbiotic Desalination: Enabling Renewable
Energy Integration Through Demand Side Regulation of Membrane and Electrochemical
Separation Technologies”. PI: Roland D. Cusick, University of Illinois at Urbana Champaign.
(Han Gu)
• National Science Foundation INTERN: Program – Non-Academic Research Internships for
Graduate Students, to facilitate NSF-project funded graduate students to get technical experience
outside of an academic setting. This grant was obtained by UC Riverside existing project
collaborators as supplemental funding for their ongoing UV-AOP studies utilizing OCWD site and