Agenda packet — Agoura Hills City Council, October 22, 2025 (part 1 of 4)

AGENDA

REGULAR MEETING

AGOURA HILLS CITY COUNCIL
Civic Center - Council Chambers
30001 Ladyface Court, Agoura Hills, California 91301
Wednesday, October 22, 2025
6:00 PM
Please silence all cell phones and other electronic devices during the meeting.

ATTEND OR WATCH THE MEETING
For in-person attendance, the Council Chambers will open to the public at 5:30 p.m. To watch the live stream or archived meeting, search “Agoura Hills City Council” on YouTube and select the meeting by date, or visit agourahillscity.gov and click the dark green “View Current Agenda(s) or Live/Archived Meetings” button at the top of the page.

PUBLIC PARTICIPATION (PUBLIC COMMENT
Option A: To provide public comments in person in the Council Chambers Members of the public may attend the meeting in person in the Council Chambers and have the opportunity to speak or submit a written comment on any item listed on the Agenda. To speak, complete a Speaker’s Card for each item and submit it to the City Clerk before the public comment portion of that item. Public testimony is limited to three (3) minutes per speaker, and time may not be transferred to another person. Written comments submitted during the meeting will not be read aloud by the City Clerk.

Option B: To submit written public comments prior to the meeting Members of the public may submit written comments on any item listed on the Agenda. To ensure the City Council has time to review and/or consider the information prior to the meeting, please include the Agenda item number or topic in the email subject line and send written public comments to [email protected] on or before 4:00 p.m. on the meeting date. Public comments are not read into the record by the City Clerk. Please note: any public comments submitted after the deadline may not be considered during the City Council’s deliberations or included in the official record. However, the public is welcome to attend the meeting to make or submit comments in person.

CALL TO ORDER

LAND ACKNOWLEDGEMENT

PLEDGE OF ALLEGIANCE

ROLL CALL
Mayor Penny Sylvester
Mayor Pro Tem Jeremy Wolf
Councilmember Kate Anderson
Councilmember Chris Anstead
Councilmember Deborah Klein Lopez

REPORT OF CLOSED SESSION

APPROVAL OF AGENDA

PRESENTATIONS
Business of the Month - Presentation to Fleet Feet

INTERGOVERNMENTAL, SPECIAL PURPOSE COMMITTEE, AND DEPARTMENTAL REPORTS Las Virgenes/Malibu Council of Governments Update
Santa Monica Mountains Conservancy Advisory Committee Update

PUBLIC COMMENTS
(This section is reserved for persons wishing to address items not listed on the Agenda that are under the subject matter jurisdiction of the City Council. Please refer to “Public Participation” above for full details on how to speak or submit written public comments under this category.)

CONSENT CALENDAR
(Items on the Consent Calendar may be approved by a single motion and vote. Unless pulled by the City Council, there will be no separate discussion of these items. This section is reserved for persons wishing to address items on the Consent Calendar. Please refer to “Public Participation” above for full details on how to speak or submit written public comments under this category.)

1. Approve Minutes of the Regular City Council Meeting of July 9, 2025 RECOMMENDATION: Approve the Minutes, as presented.

2. Approve Minutes of the Regular City Council Meeting of August 27, 2025 RECOMMENDATION: Approve the Minutes, as presented.

3. Approve Demand Warrant Register No. 941
RECOMMENDATION: Approve Demand Warrant Register No. 941.

4. Approve Treasurer's Report for July 2025
RECOMMENTATION: Approve Treasurer's Report for July 2025.

5. Approve Treasurer's Report for August 2025
RECOMMENTATION: Approve Treasurer's Report for August 2025.

6. Approve Treasurer’s Report for September 2025
RECOMMENTATION: Approve Treasurer's Report for September 2025.

7. Adopt Amendments to the City of Agoura Hills Fiscal Year 2024-25 Budget RECOMMENDATION: Approve: 1) The proposed transfers from the General Fund listed in this staff report; 2) The proposed journal entry related to the Successor Agency Shown in Exhibit ‘A’ affecting Revenues; 3) The proposed amendments to the General Fund Fiscal Year 2024-25 Budget for the amounts shown in Exhibit ‘B’; and, 4) The proposed amendments to the Special Funds Fiscal Year 2024-25 Budget for the amounts shown in Exhibit ‘C’.

8. Approval of Third Amendment to Agreement for Design Professional Consultant Services with m6 Consulting, Inc. for Construction Engineering Services Related to the Ladyface Greenway Project RECOMMENDATION: Approve the Third Amendment to the Agreement for Design Professional Consultant Services with m6 Consulting, Inc. for construction engineering services related to the Ladyface Greenway Project.

9. Approve the 2025 Updated Sanitary Sewer Management Plan as Required by State Water Resources Control Board Order No. 2022-0103-DWQ
RECOMMENDATION: Approve the 2025 Updated Sanitary Sewer Management Plan.

ORDINANCE / INTRODUCTION
(This section is reserved for persons wishing to address items listed under Public Hearing. Please refer to “Public Participation” above for full details on how to submit written public comments or speak under this category.)

10. Introduce and Waive Full Reading of Ordinance No. 25-480; Adopting by Reference the 2025 Edition of the California Buildings Standards Code Comprised of the 2025 Editions of the Administrative, Building, Residential, Electrical, Mechanical, Plumbing, Energy, Wildland Urban Interface, Historical Building, Fire, Existing Building, Green Building Standards, and Referenced Standards Code, and the 2024 Edition of the International Property Maintenance Code, and Amending Articles III and VIII of the Agoura Hills Municipal Code, Approving a CEQA Exemption Determination, and Set a Public Hearing for November 12, 2025 RECOMMENDATION: Introduce and waive further reading of Ordinance No. 25-480, and set the Public Hearing for the adoption of the Ordinance for Wednesday, November 12, 2025.

DISCUSSION / ACTION
(This section is reserved for persons wishing to address items listed under Discussion / Action. Please refer to “Public Participation” above for full details on how to submit written public comments or speak under this category.)

11. Discussion Regarding E-Bicycles Rules and Regulations RECOMMENDATION: Provide feedback and direction on the Electric Bicycle Options presented; no formal action required.

12. Discussion to Consider the Approval of the City of Agoura Hills 2025 Wildfire Risk Assessment Report RECOMMENDATION: Approve the 2025 Agoura Hills Community Wildfire Risk Assessment Report.

CITY COUNCIL, STAFF COMMENTS

ADJOURNMENT
The next Regular City Council Meeting will be held at 6:00 p.m., on November 12, 2025, in the Council Chambers of the Civic Center. The Civic Center is located at 30001 Ladyface Court, Agoura Hills, California.

In accordance with the Americans with Disabilities Act, if you require special assistance to participate in a City Council meeting or to access other services offered by the City of Agoura Hills, please contact the City Clerk’s Office at (818) 597-7300. To ensure that reasonable arrangements can be made to provide appropriate access, please provide notification at least 48 hours in advance of the meeting or time when services are needed.

Copies of staff reports or other written documentation related to each item of business on this Agenda are available on the City’s website at agourahillscity.gov and are on file in the Office of the City Clerk, Kimberly M. Rodrigues, at Agoura Hills City Hall, 30001 Ladyface Court, Agoura Hills, California, 91301.

The telecast of Regular City Council Meeting held on Wednesday, October 22, 2025 will be broadcast on Channel 10 for Time Warner Cable subscribers and Channel 3 for Charter subscribers and air daily until the next regularly scheduled City Council meeting. The broadcast schedule is as follows: M-10a m; T-3pm; W-10am; Th-7pm; F10am; S-3pm; and Su-7pm.

Date Posted: October 16, 2025

REPORT TO CITY COUNCIL
DATE: OCTOBER 22, 2025
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: NATHAN HAMBURGER, CITY MANAGER
BY: KIMBERLY RODRIGUES, CITY CLERK
SUBJECT: APPROVE MINUTES OF THE REGULAR CITY COUNCIL MEETING OF JULY 9, 2025

RECOMMENDATION
Approve the Minutes, as presented.

Attachments
Minutes CC 070925.pdf

MINUTES

REGULAR MEETING

AGOURA HILLS CITY COUNCIL
Civic Center – Council Chambers
30001 Ladyface Court, Agoura Hills, California 91301
Tuesday, July 9, 2025
6:00 p.m.

The City Council meeting was called to order at 6:00 p.m. by Mayor Sylvester.

Mayor Sylvester announced the Land Acknowledgement.

The Pledge of Allegiance was led by Executive Assistant Hubbs.

Present were: Mayor Penny Sylvester, Mayor Pro Tem Jeremy Wolf, Councilmember Kate Anderson, and Councilmember Deborah
Klein Lopez.

Absent was: Councilmember Anstead.

Also Present were: City Manager Nathan Hamburger, City Attorney Candice K.

Lee, Deputy City Manager Louis Celaya, Communication
Manager Mary Haddad, Principal Planner Robby Nesovic,
Director of Public Works/City Engineer Charmaine Yambao, Engineering Aide Joshua Keck, Building Official Lukas Quach, Director of Finance Diego Ibañez, Finance Manager Brenda Cho, Director of Community Services Amy Brink, and Executive Assistant/Recording Secretary Michele Hubbs,

REPORT OF CLOSED SESSION
No Closed Session was held.

APPROVAL OF AGENDA
ACTION: Councilmember Klein Lopez moved to approve the Agenda, as presented. Councilmember Mayor Pro Tem Wolf seconded. The motion carried 4-0, by the following roll call vote:

AYES: Mayor Sylvester, Mayor Pro Tem Wolf, and
Councilmembers Anderson and Klein Lopez.

NOES: None.

ABSTAIN: None.

ABSENT: Councilmember Anstead.

PRESENTATIONS
No presentations were given.

City Council Regular Meeting Minutes
Wednesday, July 9, 2025

Page 2 ends

INTERGOVERNMENTAL, SPECIAL PURPOSE COMMITTEE, & DEPARTMENTAL

REPORTS
Public Affairs Associate Ricki Clark of the Las Virgenes Municipal Water District provided the Water and Wastewater Rate Structure Update.

Library Manager Nina Hull provided the Agoura Hills Library Quarterly Update and introduced the newly appointed Children’s Librarian, Sarah Hollins, who briefly addressed the City Council.

Councilmember Klein Lopez provided a Clean Power Alliance (CPA) Update.

PUBLIC COMMENTS
No public comments were received.

CONSENT CALENDAR
No public comments were received.

ACTION: Mayor Pro Tem Wolf moved to approve Consent Calendar Item Nos. 1-10, as presented. Councilmember Anderson seconded. The motion carried 4-0, by the following roll call vote:

AYES: Mayor Sylvester, Mayor Pro Tem Wolf, and
Councilmembers Anderson and Klein Lopez.

NOES: None.

ABSTAIN: None.

ABSENT: Councilmember Anstead.

1. Approve Minutes of the City Council Regular Meeting of June 25, 2025

2. Approve Demand Warrant Register No. 936

3. Approve Treasurer’s Report for April 2025

4. Approve Treasurer’s Report for May 2025

5. Approve Sixth Amendment to the Design Professional Consultant Services Agreement with Michael BakerInternational for Additional Engineering Design Services Related to the Kanan Corridor Project

6. Approve the Consumption of Alcohol in Designated Area in the Park at Reyes Adobe Days 2025

7. Adopt Resolution No. 25-2114; A RESOLUTION OF THE CITY COUNCIL OF

THE CITYOF AGOURA HILLS, CALIFORNIA, DELEGATING AUTHORITY TO REQUEST DISBURSEMENTS FROM THE CALIFORNIA EMPLOYERS’
City Council Regular Meeting Minutes
Wednesday, July 9, 2025

Page 3 ends

PENSION PREFUNDING TRUST (CEPPT) AND RESCINDING
RESOLUTION NO. 22-2021.

8. Adopt Resolution No. 25-2115; A RESOLUTION OF THE CITY COUNCIL OF

THE CITY OF AGOURA HILLS, CALIFORNIA, DELEGATING AUTHORITY TO REQUEST DISBURSEMENTS FROM THE CALIFORNIA EMPLOYERS’

PENSION RETIREMENT BENEFIT TRUST (CERBT)

9. Adopt Resolution No. 25-2116; A RESOLUTION OF THE CITY COUNCIL OF

THE CITY OF AGOURA HILLS, CALIFORNIA, AUTHORIZING INVESTMENT

OF MONIES IN THE LOCAL AGENCY INVESTMENT FUND (LAIF) AND RESCINDING RESOLUTION NO. 03-1283

10. Adopt Ordinance No. 25-479; AN ORDINANCE OF THE CITY COUNCIL OF

THE CITY OF AGOURA HILLS, CALIFORNIA, DESIGNATING FIRE HAZARD

SEVERITY ZONES, AND APPROVING A CEQA EXEMPTION

DETERMINATION

DISCUSSION / ACTION

11. Discussion Regarding Oak Tree Ordinance Planning Principles Following presentation of the staff report, and a question-and-answer period with staff, Mayor Sylvester opened the floor for public comments.

No public comments were received.

After further discussion, the City Council provided staff with general direction regarding the goals and objectives of the Oak Tree Ordinance Amendment.

No formal action was required by the City Council on this item.

CITY COUNCIL, STAFF COMMENTS
The City Council commended staff on the success of the Concert in the Park and Drone Show, noting they had received only positive feedback about the event.

ADJOURNMENT
At 7:09 p.m., Mayor Sylvester announced the Regular City Council Meeting scheduled for Wednesday, July 23, 2025, had been canceled and the next Regular City Council Meeting would be held at 6:00 p.m., on Wednesday, August 13, 2025, in the Council Chambers of the Civic Center and adjourned the meeting.

Michele Hubbs, Executive Assistant/Recording Secretary
Minutes Prepared by Kimberly M. Rodrigues, MPPA, MMC, City Clerk

RECOMMENDATION
Approve the Minutes, as presented.

Attachments
Minutes CC 082725.pdf

MINUTES

REGULAR MEETING

AGOURA HILLS CITY COUNCIL
Civic Center – Council Chambers
30001 Ladyface Court, Agoura Hills, California 91301
Wednesday, August 27, 2025
6:00 p.m.

The City Council meeting was called to order at 6:00 p.m. by Mayor Sylvester.

Mayor Sylvester announced the Land Acknowledgement.

The Pledge of Allegiance was led by Director of Public Works/City Engineer Yambao.

Present were: Mayor Penny Sylvester, Mayor Pro Tem Jeremy Wolf, Councilmember Kate Anderson, Councilmember Chris
Anstead, and Councilmember Deborah Klein Lopez.

Also Present were: City Manager Nathan Hamburger, City Attorney Candice K.

Lee, Assistant City Manager Ramiro Adeva, Deputy City
Manager Louis Celaya, Executive Assistant Michele Hubbs, Principal Planner Robby Nesovic, Director of Public Works/City Engineer Charmaine Yambao, Engineering Aide Joshua Keck, Director of Finance Diego Ibañez, and City Clerk Kimberly M.

Rodrigues.

REPORT OF CLOSED SESSION
No Closed Session was held.

APPROVAL OF AGENDA
ACTION: Councilmember Anstead moved to approve the Agenda, as presented. Mayor Pro Tem Wolf seconded. The motion carried 5-0, by the following roll call vote:

AYES: Mayor Sylvester, Mayor Pro Tem Wolf, and
Councilmembers Anderson, Anstead, and Klein Lopez.

NOES: None.

ABSTAIN: None.

ABSENT: None.

PRESENTATIONS
Mayor Sylvester presented a Certificate of Recognition, the 'Best in Show' Award, to Madelyn Saglie for her artwork All About Monty at the 2025 Summer Art Show and Cultural Arts Council Members Deanna Glassberg, Karen Kent, and Randee Paller presented her with the framed original of her artwork.

City Council Regular Meeting Minutes
Wednesday, August 27, 2025

Page 2 ends

Mayor Sylvester presented a Certificate of Recognition, to representatives Maged Diab and Daniel Loyd, honoring Roadside Lumber as the August Business of the Month.

INTERGOVERNMENTAL, SPECIAL PURPOSE COMMITTEE, & DEPARTMENTAL

REPORTS
Mayor Sylvester provided a Las Virgenes/Malibu Council of Governments Update.

Councilmember Anderson provided a Santa Monica Mountains Conservancy Advisory Committee Update.

PUBLIC COMMENTS
The following person(s) spoke:

Dr. Michael Koslow (submitted written correspondence)
Jennifer Miller, Agoura Hills
David Rice, representing The Foundation for Las Virgenes Schools

CONSENT CALENDAR
No public comments were received.

ACTION: Councilmember Klein Lopez moved to approve Consent Calendar Item Nos. 1-7, as presented. Mayor Pro Tem Wolf seconded. The motion carried 5-0, by the following roll call vote:

AYES: Mayor Sylvester, Mayor Pro Tem Wolf, and
Councilmembers Anderson, Anstead, and Klein Lopez.

NOES: None.

ABSTAIN: None.

ABSENT: None.

1. Approve Demand Warrant Register No. 938

2. Approve Treasurer's Report - June 2025

3. Approve Notice of Completion for the Reyes Adobe Road High-Intensity Activated Crosswalk Project; NIB 23- 04

4. Approve First Amendment to Agreement for Contractor Services, with GMZ Engineering, Inc., for the Ladyface Greenway Project; NIB 24-02B

5. Approve a Three-Year Agreement for Contractor Services, with GeoDynamics, Inc., for Geotechnical Review Services

6. Approve Amendment to City Council 2025 Meeting Schedule City Council Regular Meeting Minutes
Wednesday, August 27, 2025

Page 3 ends

7. Adopt Resolution No. 25-2117; AUTHORIZING SUBMITTAL OF INDIVIDUAL

GRANT APPLICATIONS AND RELATED AUTHORIZATIONS FOR ALL

CALRECYCLE GRANT PROGRAMS FOR WHICH THE CITY OF AGOURA

HILLS IS ELIGIBLE

CITY COUNCIL, STAFF COMMENTS
Councilmember Anstead referenced a New York Times article about the Calabasas dump and voiced concern over the County’s initial refusal to test the debris, the need for County accountability, and emphasized the potential risk to Agoura Hills residents.

Mayor Sylvester thanked and congratulated staff on the successful Concerts in the Park series this summer.

Mayor Pro Tem Wolf reported that the inaugural hot dog eating contest between the Oak Park and Agoura High football teams was held at the last Concert in the Park. Oak Park won the contest, but Agoura Hills won the Kanan Bowl.

ADJOURNMENT
At 6:31 p.m., Mayor Sylvester announced the next Regular City Council Meeting would be held at 6:00 p.m., on Wednesday, September 10, 2025, in the Council Chambers of the Civic Center and adjourned the meeting.

Kimberly M. Rodrigues, MPPA, MMC
City Clerk

REPORT TO CITY COUNCIL
DATE: OCTOBER 22, 2025
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: NATHAN HAMBURGER, CITY MANAGER
BY: DIEGO IBANEZ, DIRECTOR OF FINANCE
SUBJECT: APPROVE DEMAND WARRANT REGISTER NO. 941
Demand Warrant No. 941 is hereby submitted for your approval.

FISCAL IMPACT
All items on the Demand Warrant are budgeted items; and all the items, when aggregated and annualized, are found to be within budget.

RECOMMENDATION
It is recommended the City Council approve Demand Warrant No. 941.

Attachments
DR 941.pdf

REPORT TO CITY COUNCIL
DATE: OCTOBER 22, 2025
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: NATHAN HAMBURGER, CITY MANAGER
BY: DIEGO IBANEZ, DIRECTOR OF FINANCE
SUBJECT: APPROVE TREASURER'S REPORT FOR JULY 2025
The Treasurer’s Report for July 2025 is hereby submitted for your approval.

FISCAL IMPACT
There is no impact to the City Council Approved Fiscal Year 2025-26 Budget.

RECOMMENDATION
Approve Treasurer’s Report for July 2025.

Attachments
Treasurer's Report - July 2025.pdf

REPORT TO CITY COUNCIL
DATE: OCTOBER 22, 2025
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: NATHAN HAMBURGER, CITY MANAGER
BY: DIEGO IBANEZ, DIRECTOR OF FINANCE
SUBJECT: APPROVE TREASURER'S REPORT FOR AUGUST 2025
The Treasurer’s Report for August 2025 is hereby submitted for your approval.

FISCAL IMPACT
There is no impact to the City Council Approved Fiscal Year 2025-26 Budget.

RECOMMENDATION
Approve Treasurer’s Report for August 2025.

Attachments
Treasurer's Report - August 2025.pdf

REPORT TO CITY COUNCIL
DATE: OCTOBER 22, 2025
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: NATHAN HAMBURGER, CITY MANAGER
BY: DIEGO IBANEZ, DIRECTOR OF FINANCE
SUBJECT: APPROVE TREASURER’S REPORT FOR SEPTEMBER 2025
The Treasurer’s Report for September 2025 is hereby submitted for your approval.

FISCAL IMPACT
There is no impact to the City Council Approved Fiscal Year 2025-26 Budget.

RECOMMENDATION
Approve Treasurer’s Report for September 2025.

Attachments
Treasurer's Report - September 2025.pdf

REPORT TO CITY COUNCIL
DATE: OCTOBER 22, 2025
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: NATHAN HAMBURGER, CITY MANAGER
BY: DIEGO IBANEZ, DIRECTOR OF FINANCE

LEAH PALMER, FINANCE MANAGER
SUBJECT: ADOPT AMENDMENTS TO THE CITY OF AGOURA HILLS FISCAL YEAR 2024-25 BUDGET Staff is presenting the City of Agoura Hills City Council the year-end financial balance for the Fiscal Year (FY) 2024-

25. The Finance Subcommittee has reviewed this item and it is now being presented to the City Council for review and approval.

Unaudited Net Operational General Fund revenues for the FY 2024-25 include adjustments for recognizing updated revenue in License and Services for building permits of $75,000, Building Check Plan of $220,000 in Building, and $35,000 in Building Plan Check Fee; this year end also has a one-time transfer in Journal Entry regarding the Successor Agency for $2.5M to account for an accounting adjustment; this is a non-cash transaction:

General Fund Revenues Amended Budget Unaudited Actual
Total Revenues $20,903,645 $22,871,439
Fiscal Year 2024-25 amended the General Fund Budget for expenditures and transfers is shown as follows:

General Fund Expenditures Amended Budget Unaudited Actual Total Expenditures & Transfers $20,796,801 $20,836,873
Net Income (Deficit) $106,844 $2,034,566
In FY 2024–25, the City of Agoura Hills faced fiscal challenges that reflected not just local issues, but broader national and global economic uncertainties. While the City’s Budget was planned with a focus on City-specific revenues and expenditures, these sources remained deeply vulnerable to macroeconomic conditions. Shifts in interest rates, inflation trends, labor market disruptions, and sector-specific downturns affected consumer behavior, business activity, and tax collections during the fiscal year.

Finance Staff monitors budget changes on a monthly, quarterly, and mid-year level, and strives to keep the Budget withing City Council approved expenditure guidelines. The City’s expenditures for FY 2024-25 continued to grow, but with careful planning and review, staff managed to keep expenditures within budgeted parameters. During MidYear review of FY 2024-25, if Departments needed additional funds, they reviewed their department for possible budget adjustments in their departmental budget to continue to maintain operations.

Staff has highlighted some of the Fiscal Year’s activities below and a justification of request for adjustments.

Taxes and Assessments
During this Fiscal Year, several macro events affected the City’s revenue sources. Economic policies like high interest rates, imposed by the Federal Reserve, to combat inflation reduced consumer and business spending, particularly on big-ticket items that generate local sales tax. Persistent inflation weakened household purchasing power, early conversations in the 1st Quarter of 2025 related to global tariffs also impacted consumer behavior, with people unsure when to buy items because of the implementation of tariffs. This affected seasonal spending related to back-to-school and holiday trends.

Sales Taxes and some assessments were lower than expected due to shifting consumer behavior. Many consumers were more conscious of spending as nationwide gas prices increased, food prices soared, and inflation affected disposable income. Sales tax was down 11% than was forecast and the City had several business closures during FY 2024-25.

Property Taxes remained flat at a 2% increase from previous years due to high interest rates and uncertain economic environment. The County Assessor did recognize the increased property values in the City of Agoura Hills, but with limited homes being sold it was difficult to calculate new property valuations and increase tax collection.

Transient Occupancy Tax/Short-Term Rental showed a huge increase, but this revenue stream is more unpredictable than the others and could have been affected by displaced residents of the Palisades Fire at the beginning of the calendar year.

Business License
Staff adjusted Business Licensing by $75,000 to recognize activity from that department, building plan checks were also adjusted, as well as the business technician fee; these revenue streams were updated to keep an accurate check of the progress of a development project in the City.

Investment Income
The City continued to receive more than the forecasted amount of Investment Income due to high interest rates in the City’s investment portfolio. The City received 117% more than anticipated and staff is aware of a possible decrease due to recent interest rate cuts by the federal reserve.

Recognized Obligation Payment Schedule
This Fiscal Year, Finance Staff had to make a one-time internal accounting adjustment to its Recognized Obligation Payment Schedule (ROPS); the ROPS is a required report that former Redevelopment Agencies (RDAs) in California must submit each year to the state (via their local Successor Agency). It lists debts and obligations (like loans or bonds) that still need to be paid following the dissolution of the RDA.

The City filed its Last and Final ROPS and it was approved by the California Department of Finance. Some of the benefits of submitting a Last and Final ROPS are: no longer having to submit a yearly ROPS to the County Oversight Board; ability to finalize and pay off debts; inclusion of any City administrative costs; and, it allows the City to standardize all payments on a fixed 4% interest rate.

Finance Staff initiated a Journal Entry to restate the ROPS balance as of June 30, 2025, at the 4% interest rate.

Staff spoke with Chavon and Associates, the City’s current auditor to explain the entry. The Journal Entry that was approved and posted to the General Ledger; is listed as Exhibit “A” and attached to this staff report.

This Journal Entry corrects the Year End balance of FY 2023-24 in the City’s Annual Comprehensive Financial Report with a restatement of 4% and balances out to the Last and Final ROPS Schedule that the California Department of Finance has. The City and the Successor Agency are both fixing their records to show that $2.56 Million was loaned from the City to the Successor Agency in the past, but wasn’t properly recorded before. Now it's being added to both sides of the accounting books through a prior period adjustment.

There is no new money in this Journal Entry, the City and the Successor Agency are just updating the ledger to reflect the current ROPS schedule in terms of what the City receives and what is expected to be paid out on what already occurred, but wasn’t recorded correctly. It is booked as a receivable that will be transferred out later this year.

As we move into the mid-year review of the 2025-26 Budget Cycle, staff will review and continue to take a more conservative approach to financial planning and update the financial assumptions for the current Fiscal Year.

The recommended Budget is balanced and in compliance with the Balanced Budget Policy (Policy). This means operating revenues cover operating expenditures, including debt service, and the ending fund balance is compliant with the minimum Policy level as defined by City Council resolution.

The City utilizes a departmental budget process, breaking out various functions of operations to allow for a transparent budget for the community to see and understand. Various departments within the General Fund exceeded budgeted appropriations, as explained in Exhibit ‘B’. These costs were offset by savings in other departments. The major departmental increases are summarized below, and adjustments this year are requested at the personnel and operations level.

In order to keep the City Council informed of transactions throughout the Fiscal Year, Finance staff is highlighting some of the expenses that took place over the Fiscal Year. Some of the Budget variance from budget to actuals can be attributed to increased costs, timing of projects, or reclassification of salaries from Special Funds to the General Fund. This section highlights the budget variance of some of the departments covered under the General Fund and will make for better budget planning during the Mid-Cycle 2026-27 process. All of these expenses are included in the overall year-end expenses listed above.

City Clerk
The budget adjustment for the City Clerk is a reduction in Contract Services, due to postponing of an internal scanning project. The request is a reduction of $48,709.

Automated Services
The reduction in Automated Services of $35,868 is due to project timing issues related to an IT upgrade.

City Attorney
The budget adjustment for the City Attorney Budget is an additional request of $270,858, due to unanticipated litigation costs.

Finance
Staff is requesting an increase of $99,127 in overall salaries and contract services for the Department. Some of the salaries dedicated to projects in Special Funds did not happen due to timing of projects.

Public Facilities
Staff is requesting an increase in the Public Facilities Department, due to the rising costs of utilities and park maintenance. The request is an increase of $94,826 dollars.

Emergency Incident
During the Fiscal Year there was an unexpected special supply expense related to the department that was not budgeted, this adjustment request of $14,037 seeks to make an appropriation in this account.

Community Development
The department also had a reduction of $253,881 of Full time Salaries and Contract Services due to the timing of a development project.

Building and Safety
The Building and Safety Department has a reduction of $91,028 in contract services.

Recreation
Staff is requesting a reduction of $89,076 in Part-Time Salaries in various program salaries.

Reyes Adobe
There is a $30,000 budget reduction in the Reyes Adobe Other Improvements budget line item.

Recreation Center
The recommended adjustment to the Recreation Budget is due to salary increases and increases to Utilities and Maintenance/Building Grounds. The request is $66,518. The Recreation Center also has a decrease of $33,701.

Parks Maintenance
The Parks Maintenance Budget needs an additional $92,504 for expenses related to grounds maintenance and an increase in utility expenses. This department also has reduction of $35,762 in Special Supplies.

Public Works
The Personnel Budget on the Public Works Department needs an adjustment of $298,647 for salaries due to the timing of projects in the Department.

Special Funds
Staff has also reviewed Budget adjustments for the FY 2024-25 budget adjustments for the City’s Special Funds.

The Special Funds have been adjusted for salary, work performed, and other expenditures. Some of these funds might be in a deficit, but it is due to project timing or pending reimbursements. Staff has provided the proposed changes to the Special Funds in Exhibit C.

FISCAL IMPACT
The City has a Balanced Budget Policy, which states that the General Fund operating revenues must fully cover operating expenditures, including debt service. Under this Policy it is allowable for total expenditures to exceed revenues in a given year: however, in this situation beginning fund balance can only be used to fund capital improvement planned projects, or other “one-time”, nonrecurring expenditures. Furthermore, the fund balance must meet the minimum Policy levels of 40%, as defined by the City Council.

The Amended Budget refers to forecasts that were adopted during the budget season of FY 2024-25; tentatively around June of 2024. The Unaudited Actual are forecasts that have been reviewed and finalized at the close of June 2025. These projections involve adjustments to departments for salaries due to timing of projects along with costs that could have exceeded operations for the year.

It is important to clarify one point that was discussed at the Finance Subcommittee. If the Journal Entry to the Successor Agency is not approved what would be the ending balance to the FY 2024-25. The City would have had a deficit of $523,472 closing out Fiscal Year 2024-25. See calculation below:

Revenue: $22,871,439 (Journal Entry of $2,558,038 for SA Included) Expenditures: ($20,836,873)
Total: $2,034,666
Deduct SA JE: ($2,558,038)
Unaudited Actuals ($523,472)
This total is inclusive of all transfers approved during the budget process. Additionally, if the Journal Entry is not approved, the City’s ending balance for the ROPS in the Annual Comprehensive Financial Report and the Last and Final ROPS with the Department of Finance would need to be readjusted and re-submitted.

As highlighted at the beginning of the report, the City has an unaudited actual net income of $2,034,566. The positive fund balance is a non-cash recording of an advance to the Successor Agency, due to a journal entry.

There are big macro events still taking place such as, world-wide unrest, determination of interest rate cuts, mixed messages of inflation and unemployment that can influence future project plans and the mid-cycle budget process.

Staff does recommend the following transfers:
011 Capital Projects Fund ($ 96,000) 015 To Recreation Center Capital Project ($ 104,000) 030 CAL PERS SET ASIDE FUND ($ 95,850) 305 Agoura Hills Improvement Authority Bond ($1,271,613) 620 Housing Successor Agency ($ 178,010) Total Transfers of ($1,745,473) Staff recommends no additional transfers at this time.

RECOMMENDATION
Staff respectfully recommends the City Council approve:

1. The proposed transfers from the General Fund listed in this staff report.

2. The proposed journal entry related to the Successor Agency Shown in Exhibit ‘A’ affecting Revenues.

3. The proposed amendments to the General Fund Fiscal Year 2024-25 Budget for the amounts shown in Exhibit ‘B’.

4. The proposed amendments to the Special Funds Fiscal Year 2024-25 Budget for the amounts shown in Exhibit ‘C’.

Attachments
Exhibit A - Successor Agency Journal Entry.pdf
Exhibit B - Budget Adjustments.pdf
Exhibit C - Budget Adjustments Special Funds.pdf
06/30/25 ,Restated Balance @ 4%:

Principal Outstanding: $ 11,405,550
Interest Outstanding: $ 16,141,057 (ROPS 23-24B covers Jan-Jun 2024) Net Amount due as
restated - 6/30/24: $ 27,546,607
Journal Entry to Correct FY 2024-25 Ending Balance in ACFR (Page 57) - Post as of June 30, 2025 Note: there is no amount that is "uncollectible" with the restatement of interest rate @ 4%, which balances to the Last and Final ROPS schedule.

General Fund:

DR: Advances to Successor Agency $ 2,558,038
CR: Prior Period Adjustment $ 2,558,038
Successor Agency Fund:

DR: Prior Period Adjustment $ 2,558,038
CR: Advance from City of AH $ 2,558,038
Entry to Post activity from FY 2024-25 - Post as of June 30, 2025.

General Fund:

DR: Cash $ 469,430
CR: Advances to Successor Agency $ 469,430
Successor Agency Fund:

DR: Advance from City of AH $ 469,430
CR: Cash $ 469,430
City of Agoura Hills
Fiscal Year 2024-25 Budget Amendments
Exhibit "A"

REPORT TO CITY COUNCIL
DATE: OCTOBER 22, 2025
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: NATHAN HAMBURGER, CITY MANAGER
BY: CHARMAINE YAMBAO, DIRECTOR OF PUBLIC WORKS DIRECTOR / CITY ENGINEER SUBJECT:

APPROVAL OF THIRD AMENDMENT TO AGREEMENT FOR DESIGN PROFESSIONAL CONSULTANT SERVICES WITH M6 CONSULTING, INC. FOR CONSTRUCTION ENGINEERING SERVICES RELATED

TO THE LADYFACE GREENWAY PROJECT
This report seeks City Council approval of additional construction engineering services to the Agreement for Design Professional Consultant Services with m6 Consulting, Inc. (m6) related to construction of the Ladyface Greenway Project. The Ladyface Greenway Project (Project) consists of constructing a new greenway over an existing rectangular concrete-lined runoff channel that is owned and maintained by the Los Angeles County Flood Control District (LACFCD).

In September 2023, the City entered into an agreement with m6 to provide construction engineering services during construction for the Project. Construction engineering services are crucial in assisting staff during the construction phase of the project, so that the design engineer (and their subconsultants) can respond to questions or requests for further clarification from the City and/or contractor, as issues arise in the field. As the original design engineer, m6 will be responsible to provide the City “as-built” plans when the project is completed. Additionally, m6 ensures that any field modifications necessary to construct the project do not negatively affect the integrity of the approved design plans.

In April 2024, the City approved the First Amendment to m6’s Agreement in the amount of $27,730, which was approved by the City Manager. Per Section 4.B of the Agreement, the City Manager may approve additional work up to 10% of the Agreement amount. The additional services included Worker’s Environmental Awareness Program (WEAP) training, and rebidding design services, which included value engineering. With Amendment 1, the total contract amount was $518,668.

On June 11, 2025, the City Council approved the Second Amendment to m6’s Agreement in the amount of $107,015. The first construction activities included pile drilling. The soils encountered during drilling were continuous hard rock through approximately half of the project area. The site condition of hard rock was unanticipated site conditions changes, which required additional geotechnical observations and inspections. The Second Amendment was for these increased construction engineering services for additional geotechnical and field observation services during hard rock drilling. With Amendment 2, the revised total Agreement was $625,683.

Currently, the Project is completing construction of utility undergrounding, waterline realignment, new storm drain in Agoura Road, and girder (concrete deck) installation. Additional construction engineering services for design revisions were required for the undergrounding of utilities and construction of new storm drain, due to unforeseen site conditions, such as existing utility lines within the alignment of proposed new wet and dry lines, and additional source inspection at the precast girder plant was initially required for quality control.

Due to these project site condition changes and quality control issues, m6 is requesting additional compensation for the increased construction engineering services to cover the technical complexities encountered during construction. Lastly, the unanticipated site change of hard rock, required an estimate of 4-5 months additional time to complete the drilling. With a Project construction schedule extended for an estimated 4-5 months, additional compensation and time extension in construction engineering design, evaluation, and clarification for the Project to completion is required. Based on Section 4 of the Agreement, any additional compensation over 10% of the contract amount requires approval by the City Council. In order for m6 to continue providing construction engineering services for the Project, staff is seeking approval of a Third Amendment to the Agreement to allow for an additional $200,000 for a revised total Agreement of $825,683, and a term extension to June 30, 2027.

The scope of work and all other terms and conditions of the Agreement are not expected to change and remain the same as previously approved.

The proposed Amendment to the Agreement has been reviewed by the City Attorney and approved as to form.

FISCAL IMPACT
The Project is fully funded through a combination of State Earmark dollars awarded by former Assemblymember Bloom, the Los Angeles County Metropolitan Transit Authority (Measure R and M Funds) approved by the Las Virgenes-Malibu Council of Governments, Measure W (Local), and Memorandum of Agreement with Las Virgenes Municipal Water District.

There is no fiscal impact to the City’s General Fund from the Third Amendment to the Agreement with m6.

RECOMMENDATION
Staff respectfully recommends the City Council approve the Third Amendment to the Agreement for Design Professional Services with m6 Consulting, Inc. for construction engineering services related to the Ladyface Greenway Project.

Attachments
2025 3rd Amendment m6 CE Ladyface Greenway.pdf

THIRD AMENDMENT TO AGREEMENT FOR DESIGN PROFESSIONAL

CONSULTANT SERVICES WITH THE CITY OF AGOURA HILLS
NAME OF CONTRACTOR:

RESPONSIBLE PRINCIPAL OF CONTRACTOR:

CONTRACTOR'S ADDRESS:

CITY'S ADDRESS:

PREPARED BY:

COMMENCEMENT DATE:

TERMINATION DATE:

CONSIDERATION:

A0130-CCMYR-2025AMD
m6 Consulting, Inc
Attn: Robert Woodward, PE
893 Patriot Drive, Unit E
Moorpark, CA 93021
City of Agoura Hills
30001 Ladyface Court
Agoura Hills, CA 91301
Attn: City Manager
Charmaine Yambao
July 1, 2024
June 30, 2027
Amendment Amount:
$200,000.00
Total Contract Price
Not to Exceed: $ 825,683.00/yr
(181 Amendment of $27,730.00
increased Original contract of
$490,938.00 to $518,668.00; 2
nd
Amendment of $107,015.00
increased contract to
$625,683.00; 3
rd Amendment of
$200,000 increased contract to
$825,683.00)

KELLY FISHER, DEPUTY DIRECTOR OF PUBLIC WORKS
SUBJECT: APPROVE THE 2025 UPDATED SANITARY SEWER MANAGEMENT PLAN AS REQUIRED BY STATE WATER RESOURCES CONTROL BOARD ORDER NO. 2022-0103-DWQ
On July 8, 2009, the City Council approved the City’s Sanitary Sewer Management Plan (SSMP), as required by State Water Resources Control Board (SWRCB) Order No. 2006-003-DWQ. The adopted Statewide General Waste Discharge Requirements were developed due to a growing concern about the water quality impacts of sanitary sewer overflows and spills, particularly those that cause beach closures or pose serious health and safety problems.

The SSMP sets forth goals and guidelines for managing, operating, maintaining, repairing, replacing and expanding the City’s sewer system. Specifically, the City’s SSMP contains the following:

Goals and Actions;
Description of the Organization;
Legal Authority;
Operation and Maintenance Program;
Design and Performance Provisions;
Spill Emergency Response Plan;
Sewer Pipe Blockage Control Plan;
System Evaluation and Capacity Assurance Plan;
Monitoring, Measurement, Program Modifications;
SSMP Program Audits and Certification; and
Communication and SSMP Availability.

On December 6, 2022, the SWRCB adopted Order No. 2022-0003-DWQ which updated the waste discharge requirements. The key changes included:

Expanding the prohibition on discharges from sanitary sewers to waters of the State; Amending the spill reporting and monitoring requirements; Amending the requirements for coordinated interagency spill responses; Adding new requirements to address climate change impacts; and Reducing the frequency of SSMP Updates and Audits.

The SSMP is intended to be a living document which must be updated every six years to reflect current conditions and knowledge of the sewer system. Since the Consolidated Sewer Maintenance District of Los Angeles County provides operation and maintenance services for the City’s sewer facilities, the City’s SSMP is updated to be consistent with Los Angeles County’s SSMP update. The Los Angeles County SSMP Update was adopted by the Los Angeles County Board of Supervisors on July 29, 2025.

Staff has worked closely with Willdan Engineering (Willdan) to prepare the 2025 Updated SSMP, and deem it complete in terms of addressing all the requirements of the order. Willdan assisted in developing the City’s initial plan that was approved in August 2009 and all subsequent updates.

FISCAL IMPACT
The approved Fiscal Year 2025-26 City Budget allocated $10,000 in the Public Works Department’s NPDES Compliance Account (010-4525-5520.43) to fund the SSMP Update.

RECOMMENDATION
Staff respectfully recommends the City Council approve the 2025 Updated Sanitary Sewer Management Plan.

Attachments
Agoura Hills 2025 SSMP Update.pdf

SEWER SYSTEM MANAGEMENT PLAN
for the
City of Agoura Hills
in
Los Angeles County, California
WDID: 4SSO11366
June 29, 2009
Updated: October 13, 2025

SEWER SYSTEM MANAGEMENT PLAN
for the
City of Agoura Hills
in
Los Angeles County, California
Approved by Public Works Director/City Engineer:

Charmaine Yambao, P.E. October 13, 2025
Prepared by Willdan Engineering
374 Poli St. Suite #101
Ventura, California 93001
(805) 653-6597
October 13, 2025
3 TABLE OF CONTENTS
Abbreviations / Acronyms
Definitions
Executive Summary
Chapter 1 – Introduction

1.1 Regulatory Context

1.2 Sewer System Management Plan Update Schedule

1.3 Sewer System Asset Overview

1.4 Goals and Actions
Chapter 2 - Description of the Organization

2.1 Management

2.2 Legally Responsible Official

2.3 City’s Responsibilities

2.4 Organization Chart and Responsibilities

2.4.1 Organization Chart for Sanitary Sewer System Management

2.4.2 Description of Individual Responsibilities

2.4.3 Key Support Divisions

2.4.4 Chain of Communication for Spill Reporting

2.4.5 Spill Reporting Procedures Flow Chart

2.4.6 City’s Contact Directory for Spill Responding and Reporting Chapter 3 - Legal Authority

3.1 Legal Authority

3.1.1 Authority to prevent illicit discharges into the sewer system

3.1.2 Authority to collaborate with storm sewer agencies to coordinate spill responses, ensure access to storm sewer systems during spill events, and prevent unintentional cross connections of sanitary sewer infrastructure

3.1.3 Authority to require sewers and connections be properly designed and constructed

3.1.4 Authority to ensure access for maintenance, inspection, or repairs

3.1.5 Authority limiting discharge of FOG and other debris that may cause blockage

3.1.6 Authority to enforce a violation of sewer ordinances, service agreements, and/or other legally binding procedures

3.1.7 Authority to fund operations & maintenance of the sewer system

3.1.8 Authority to obtain easement accessibility agreements for locations requiring sewer system operations and maintenance
Chapter 4 - Operation and Maintenance Program

4.1 City Sewer Mapping System

4.2 Preventative Maintenance Program

4.2.1 CCTV Inspection

4.2.2Sewer line and manhole inspection

4.2.3 Gas Trap manholes and siphons

4.2.4 Drop Manholes
4 4.2.5 Sewer line cleaning

4.2.6 Root foaming

4.2.7 Periodic Maintenance

4.2.8 Vermin and odor control

4.2.9 Sewage pump stations

4.2.10 Work scheduling

4.3 Rehabilitation and Replacement Plan

4.3.1 Accumulative Capital Outlay program of the CSMD

4.3.2 Condition assessment program

4.4 Training for field operations personnel and contractors

4.5 Equipment maintenance and replacement policy
Chapter 5 - Design and Performance Provision

5.1 Design and construction standards and specification

5.2 Procedures and standards for inspection and testing Chapter 6 - Spill Emergency Response Plan

6.1 Spill Response Procedure

6.1.1 Regulatory agencies notification and time frame

6.1.2 Procedure to ensure staff and contractors are aware and appropriately trained to follow spill emergency response plan

6.1.3 Procedures to address emergency operations such as traffic control and other necessary response activities

6.1.4 Program to eliminate or minimize discharge of spills into waters of the United States

6.1.5 Field response report protocol and forms

6.1.6 Spill flow estimation tables and photographs

6.1.7 Regulatory Agencies Notification and Time Frame
Chapter 7 – Sewer Pipe Blockage Control Program

7.1 Public education and outreach program

7.2 Disposal methods for FOG generated within the City service area

7.3 Legal authority to prohibit discharges to system and identify measures to prevent spills and blockages caused by FOG

7.4 Requirements to install grease removal devices, design standards, maintenance requirements, BMP requirements; record keeping and reporting requirements

7.5 Authority to inspect grease producing facilities, enforcement authorities & evidence of adequate staffing to inspect and enforce FOG ordinance

7.6 Cleaning schedule for identified FOG prone sewer segments

7.7 Source control measures developed and implemented to address FOG issues

7.8 Some BMPs for Fats, Oil, and Grease
Chapter 8 - System Evaluation, Capacity Assurance and Capital Improvements

8.1 System evaluation and condition assessment

8.2 Adequate capacity and correct design

8.3 Prioritization of Corrective Actions

8.4 Capacity Enhancement Plan

8.5 Capital Improvement Plan
5 8.6 Financing of Improvements
Chapter 9 - Monitoring, Measurement, and Program Modification

9.1 Maintenance of Information

9.2 Monitoring of Implementation and Effectiveness of the SSMP

9.3 Program Audits

9.4 Assessment of Preventative Operation and Maintenance Program

9.5 Spill location mapping and trends

9.5.1a Reported City Spills (2022-2025)

9.5.1b Location map of reported City spills (2022-2025)

9.5.2 Graphing and charting of spill frequencies
Chapter 10 - SSMP Program Audit and Certification

10.1 SSMP program audit

10.2 SSMP certification

10.3 SSMP modification and re-certification
Chapter 11 - Communication Program

11.1 Communication

11.2 SSMP availability

APPENDICES
Appendix A1---------------------
In the SMD SSMP
Appendix A2--------------------
In the SMD SSMP
Appendix A3----------------------
In the SMD SSMP
Appendix B1--------------------
In the SMD SSMP
Appendix B2--------------------
Governing Board Approval
SWRCB – General Order for Sanitary Sewer Systems
Asset Summary Per Collection System
List of Staff Responsible for Implementing Specific Elements of the SSMP
In the SMD SSMP
Appendix D--------------------
In the SMD SSMP
Appendix F---------------------
In the SMD SSMP
Appendix G---------------------
In the SMD SSMP
Field Operations Yard & Pump Station Map
Spill Emergency Response Plan
IDWP Conditions and Limitations
Appendix K--------------------- Spill Emergency Response Plan Appendix L--------------------- Sewer System Capacity Evaluation Appendix M-------------------- Policies for Managing Available Sewer Capacity Appendix N-------------------- CCTV Inspection Report
Appendix O--------------------
Location Map – Delivery Points, Maintenance Zones, Flow Monitoring Locations & Hydraulic Identifications
Appendix P--------------------- Industrial Waste Contract With City Appendix Q--------------------- 2025 SSMP Update Extension Letter Sewer Maintenance Division Staff Contact Sheet
6 Appendix R--------------------- SSMP Change Log
7 ABBREVIATIONS/ACRONYMS
ACO Accumulative Capital Outlay
AHMC Agoura Hills Municipal Code
APWA American Public Works Association
BMP Best Management Practice
CADD Computer Aided Design & Drafting
CALOSHA California Occupation, Safety and Health Administration CIWQS California Integrated Water Quality System
CCTV Closed – Circuit Television
CSD County Sanitation Districts of Los Angeles County
CSMD Consolidated Sewer Maintenance District
DPW Department of Public Works
FOG Fats, Oil, and Grease
FSE Food Service Establishments
GIS Geographical Information System
HDPE High Density Polyethylene Pipe
I/I Infiltration / Inflow
LACDPW Los Angeles County Department of Public Works
LACo Code Los Angeles County Code
LRO Legally Responsible Official
LVMWD Las Virgenes Municipal Water District
MMS Maintenance Management System
NOI Notice of Intent
OES Office of Emergency Service
RWQCB Regional Water Quality Control Board
SMD Sewer Maintenance Division
SO&M Sewer Operation and Maintenance
SSMP Sewer System Management Plan
SSO Sanitary Sewer Overflow
SU Sewage Unit
SWRCB State Water Resources Control Board
WDR Statewide General Waste Discharge Requirements
8 DEFINITIONS
Blockage or Stoppage – A buildup of debris in the sewer, which stops the flow of wastewater and allows the water to back up behind the stoppage, sometimes causing an overflow.

California Integrated Water Quality System (CIWQS) – A statewide database that provides for mandatory electronic reporting as required in State and Regional Water Board-issued waste discharge requirements.

Geographical Information System (GIS) – A database linked with mapping, which includes various layers of information used by government officials. Examples of information found on a GIS can include a sewer map; sewer features such as pipe location, diameter, length, material, condition, last date cleaned or repaired. The GIS also typically contains base information such as streets and parcels.

Infiltration/Inflow (I/I) – Infiltration is generally considered to be extraneous water that enters the sewer system over longer periods of time, such as groundwater seepage through cracks in the sewer. Inflow is generally considered to be extraneous water that enters the system as a direct result of a rain event, such as through defects in the sewer. While it is impossible to control all I/I, it is certainly desirable to reduce I/I when cost-effective.

Lateral – The portion of sewer that connects a home or business with the main line in the street.

Spill - Discharge of sewage from any portion of a sanitary sewer system due to a sanitary sewer system overflow (SSO), operational failure, and/or infrastructure failure. Sewage and its associated wastewater spilled from a sanitary sewer system may threaten public health, beneficial uses of waters of the State, and the environment. “Spill” is also referred to in this document as a Sanitary Sewer Overflow (SSO).

Wastewater Collection System – All pipelines, pump stations, and other facilities upstream of the headworks of the wastewater treatment plant that transport wastewater from its source to the wastewater treatment plant.

Waters of the State - Surface waters or groundwater within boundaries of the state as defined in Water Code section 13050(e), in which the State and Regional Water Boards have authority to protect beneficial uses. Waters of the State include, but are not limited to, groundwater aquifers, surface waters, saline waters, natural washes and pools, wetlands, sloughs, and estuaries, regardless of flow or whether water exists during dry conditions. Waters of the State include waters of the United States.

Waters of the United States – All waters which are used, were used or may be used in interstate or foreign commerce; including interstate wetlands; all other waters such as intrastate lakes, rivers, streams (including intermittent streams), adjacent wetlands, impoundments of water, etc., the use, degradation or destruction of which could affect interstate or foreign commerce; tributaries of waters so identified; and the territorial seas. Please refer to the following link to access Federal register published on January 18, 2023 for the updated and detailed definition of this item (https://www.federalregister.gov/documents/2023/01/18/2022-28595/revised-definition-ofwaters-of-the-united-states). 9 SEWER SYSTEM MANAGEMENT PLAN

FOR THE

CITY OF AGOURA HILLS

EXECUTIVE SUMMARY
This plan document was prepared in compliance with a formal order issued by the State Water Resources Control Board. The order requires every owner and operator of publicly owned sewer systems to develop and implement a system specific Sewer System Management Plan (SSMP).

This plan sets forth goals and actions to be followed, and guidelines for various activities involved in managing, operating, maintaining, repairing, replacing and expanding the sewer system. Chapter 6 describes actions to follow when responding to a spill occurrence within the community, including reporting obligations. There are chapters which describe legal authorities for managing the system, and ministerial actions required in monitoring, auditing, reporting and communicating with the public and regulators. There are specific requirements for accomplishing public involvement and the reporting and modifying (changing) of the plan.

These later requirements are intended to raise public awareness of the hazards associated with spill events and to minimize the occurrence of such events. • The City’s initial plan was approved and certified by August 2, 2009. The City’s updated plan herein is to be approved and certified by November 3, 2025 per the city’s Extension Request letter dated June 4, 2025.
• This proposed plan is an update to the City’s initial plan. • The plan is to be monitored and updated no less frequent than every six years. • The plan must be periodically audited for effectiveness, a report compiled and kept on file and such audits must occur no less frequent than every three years. • There are reporting timeframes for both emergency and routine reporting events. • The adoption of and any revision to the plan must be accomplished utilizing public notification and public hearing procedures as identified in the plan and order. • Copies of the approved plan must be available for public review, and when requested by the State or Local regulatory agencies copies are to be provided, including any audit reports. These documents must also be uploaded to CIWQS and certified by the City’s Legally Responsible Official (LRO).
.

CHAPTER 1

INTRODUCTION

1.1 Regulatory Context
On May 2, 2006 the State Water Resources Control Board (SWRCB) adopted Statewide General Waste Discharge Requirements (WDR) and Monitoring and Reporting Program, for sanitary sewer systems by issuing Order No. 2006-0003-DWQ (See Appendix ‘A’ in the SMD SSMP).

The regulations in the Order were in response to growing public concern about the water quality impacts of Sanitary Sewer Overflows (spill), particularly those that cause beach closures, adverse effects to other bodies of water, or pose serious health and safety or nuisance problems.

Two major components of the WDR require the following:
(1) The owners/operators of publicly owned Sewer Collection Systems, a mile long or greater, must apply for coverage under the WDR; and,
(2) The owners/operators must develop and implement a Sewer System Management Plan (SSMP) specific to the sanitary sewer system.

In compliance with the first component, the City of Agoura Hills (City), a municipality of Los Angeles County, filed a Notice of Intent (NOI) application form with the SWRCB on October 18, 2006. The City subsequently received electronic access to the California Integrated Water Quality S y s t e m (CIWQS) d a t a b a s e . Within t h e d a t a b a s e -reporting p r o g r a m , t h e C i t y completed a “collection system questionnaire” and has filed all subsequent updates and all required spill reporting.

In compliance with the second component, this document was prepared to meet the objectives contained in the WDR Order. Since the Consolidated Sewer Maintenance District (CSMD) of the Los Angeles County Sewer Maintenance Division (SMD), provides operation and maintenance services for the City’s sewer facilities, some components of the City’s SSMP are the same as those of the SMD SSMP. This document is divided into 12 chapters, which closely align with the respective provisions contained in the WDR. Every section or subsection of each chapter addresses one of the key elements of the SSMP directive.

This document, with other existing agency programs referenced herein, constitute the City’s SSMP. By implementing procedures contained in this SSMP, the occurrence of spills should decrease or possibly be avoided throughout the City’s wastewater collection system.

This version of the SSMP is an update to the original 2015 SSMP, and the subsequent April 2023 Update. It is important to note this update is consistent with the published guidelines by SWRCB and Order No. 2022-0103-DWQ, which was adopted on December 6, 2022, and became effective on June 5, 2023.

Prior to the 2022 Order’s effective date, the City’s LRO successfully certified the City’s continued regulatory coverage under the WDR in the California Integrated Water Quality System (CIWQS) Sanitary Sewer System Database.

The intent of the WDR is to provide consistent statewide requirements for managing and regulating sanitary sewer systems throughout California. The State Water Board recognized a need to provide this consistent regulatory measure because many of the Regional Water Boards 11 were beginning to implement similar measures inconsistently throughout the State, which was creating confusion in the discharger community. The State Water Board believes that providing a consistent regulatory measure that identifies regulatory expectations and comprehensive spill data will ultimately yield better collection system management and performance.

There are three major components to the WDR, including:
• Prohibitions;
• Sanitary Sewer Management Plan (SSMP) Elements; and
• Spill Reporting
While there are many other relevant components and findings within the WDR, the major components identified above represent most of the State Water Board’s regulatory expectations for the implementation of the WDR. This regulatory audit is intended to provide an analysis of the current programs and practices within the City of Agoura Hills that address the above issues.

This document will provide recommendations to ensure the development of appropriate SSMP programs and an appropriate time schedule necessary to comply with the WDR.

1.2 Sewer System Management Plan Update Schedule
*Per Per Section 5.5 and Attachment E1, Section 3.11 of General Order, Plan updates are due within six years after the required due date of the Enrollee’s last Plan Update. ** Per Section 5.4 and Attachment E1, Section 3.10 of the General Order, the Audit Report is due within six months after the end of the required audit period.

1.3 Sewer System Asset Overview
The City was incorporated in December 1982 and currently serves an area of 7.86 square miles with a population of approximately 19,474 people, per the 2023 United States Census. The City is located in the County of Los Angeles where it is bordered to the north by Ventura County, to the west by the City of Westlake Village, to the south by unincorporated Los Angeles County, and to the east by the City of Calabasas and unincorporated Los Angeles County.

The City’s wastewater collection system is managed by the City Department of Public Works (City DPW) and is currently maintained under contract with the Los Angeles County Department of Public Works (LACDPW or County DPW). The total budget for system operation, maintenance and administration is approximately $514,161.75 for FY 2025/26 based upon the sewage unit charge rate of $64.50. The wastewater collection system consists of approximately

53.6 miles of gravity sewers and 1,294 manholes. Sewer service connections are 96.22% residential, 3.22% commercial, and 0.38% industrial. There are 7,971.5 sewage units in the City.

The City currently does not have any constructed structures to convey stormwater to the sewer SSMP Update Due Dates*
8/2/2025 8/2/2031 8/2/2037 8/2/2043
Audit Due Dates**
End of
Audit
Period
Audit Due
Date
End of
Audit
Period
Audit Due
Date
End of
Audit
Period
Audit Due
Date
End of
Audit
Period
Audit Due
Date
8/2/2024 2/2/2025 8/2/2027 2/2/2028 8/2/2030 2/2/2031 8/2/2033 2/2/2034 Annual Report (due April 1st annually)
Training Programs (Ongoing)
12 system. All flows from City sewers discharge into Las Virgenes Municipal Water District (LVMWD) trunk sewer facilities for conveyance to the Tapia Water Reclamation Plant in Malibu Canyon for treatment and disposal of wastewater.

Trunk sewers located in the City of Agoura Hills are owned by Las Virgenes Municipal Water District for which they are responsible for their operation and maintenance. Local main sewer lines are owned by the City and maintained by the Consolidated Sewer Maintenance District of LA County. Sewer laterals are owned by the property owner and are their responsibility for maintenance.

Sewer data is managed cooperatively between the City, CSMD, and LVMWD. Unique service area boundary challenges include the collaboration between the City, CSMD, and LVMWD for spill response, ownership, and maintenance of the sewer system. Detail regarding the specific data management systems utilized by CSMD can be found in Section 1.4 of the SMD SSMP Update.

The existing sewer pipes range from 8 to 15 inches in diameter (96% are 8-inch diameter) and are predominantly vitrified clay pipe material. The majority of the City’s sewer pipes were installed between the 1960’s and 2007. The City’s sanitary sewer system maps can be found in Appendix ‘O’ of this document.
13 1.4 Goals and Actions
The goals of this SSMP are as follows:

1. Develop a complete understanding of the sanitary sewer system’s available capacity through necessary studies in order to facilitate management for a sustainable infrastructure.

2. Maintain or improve the condition of the collection system infrastructure in order to provide reliable service now and into the future.

3. Minimize the number and impact of spills that occur.

4. Improve cooperative effort between agencies implementing the plan.

5. Reduce spill emergency response time through coordination of a localized first responder program.

6. Meet and exceed the intent of the requirements of WQO.

Actions to be taken to satisfy SSMP goals are as follows:

1. Conduct a planned and scheduled maintenance program to minimize the risk and occurrence of spills.

2. When a spill occurs, respond to the incident in a timely manner and undertake feasible remedial actions to contain the overflow, including stopping the flow from reaching a storm drain, if possible.

3. Stop the spill as soon as possible and limit public access to the overflow area to prevent public contact with any wastewater contamination.

4. Completely recover the overflow sewage, return it to the sewer system, and clean up the contaminated area.

5. Gather and compile all pertinent information regarding the spill incident, investigate as necessary to determine probable cause, document findings, report the incident to appropriate regulatory agencies in a timely manner, and file the completed report.

6. Condition all development and capital projects to evaluate, design and construct sewer facilities per the Los Angeles County approved standards and criteria.1 1 Per Title 20, Division 3, Chapter 20.32.3 of the Los Angeles County Ordinance (LINK) CHAPTER 2
14 DESCRIPTION OF THE ORGANIZATION

2.1 Management
The City hastwo (2) positions partially budgeted in Sewer Operations and Maintenance (SO&M) activities. Distribution of the City’s personnel is depicted in the organization chart presented in Section 2.4.1 of this plan. The field operation and maintenance services are fulfilled by utilizing services provided through the Consolidated Sewer Management Division (CSMD).

City personnel, in collaboration with County DPW personnel, administer the City’s sewer collection system operation, provide engineering evaluation of proposed and existing sewer facilities, administer preventive maintenance and sewer construction programs, and oversee maintenance of the wastewater collection system facilities and related records and plans.

2.2 Legally Responsible Official
The Public Works Director/City Engineer in concert with designated County DPW staff, are the authorized representatives who are responsible for execution of compliance actions required under the WDR. This includes, but is not limited to, execution and certification of all reports and correspondence as required under the Order. Charmaine Yambao, Public Works Director/City Engineer is the City’s designated Legally Responsible Official.

2.3 City’s Responsibilities
City has applied for coverage under the WDR for facilities it owns and holds a specific waste discharge identification (WDID) number with the state Water Resources Control Board (WDID No. 4SSO11366). The City prepared a comprehensive SSMP in 2009, and subsequent updates in 2015 and 2023. Article V, Chapter 2, 5200 of the City’s Municipal Code has adopted Title 20 - Utilities, Division 2 - Sanitary Sewers and Industrial Waste of the Los Angeles County Code.

City Departments will play significant roles, jointly and separately, towards attaining the goals of this plan. The degree of these collaborative efforts will vary from department to department depending on the degree of spill related services the County DPW is providing under its agreements with the City.

2.4 Organization Chart and Responsibilities
The organization chart, showing the structure and relationship of City and County DPW administrative, management and field positions relative to SO&M is presented below and the descriptions of responsibilities and support are presented in Sections 2.4.2 and 2.4.3. 14 2.4.1 Organization Chart for Sanitary Sewer System Management

2.4.2 Description of Individual Responsibilities - The description of responsibilities or roles of each position especially as related to spills are as follows:
• City Council – Responsible for establishing new and amending existing laws governing the implementation of the SSMP and approving all SSMP related contracts and agreements.
• City Manager – Establishes SSMP policy within the scope of the City’s’ policy and legal requirements, directs its execution, and evaluates work accomplished for the SSMP.

Directs the development and enactment of new ordinances • Public Works Director/City Engineer – Responsible for formulating SSMP policies, and procedures. Directs emergency sewer repair activities, special studies, investigations and reports concerning sewer infrastructure, and approves the design and construction of new and rehabilitation of existing sewer systems. Responsible for training of personnel, and for processing of access easement documents and procuring easements 15 for public sewer facilities located in private properties. Assists in investigating spill related claims and litigations against the City. Responsible for developing standard plans and preparing plans and specifications for sewer enhancement and reconstruction projects. Reports to the City Manager.
• Deputy Director of Public Works – Assists in the formulation of SSMP policies and procedures. Direct studies, investigations, and the preparation of reports, budget and contractual agreements with private firms. Responsible for the day-to-day management and operation of the SSMP. Assists in directing engineering and management activities relating to the maintenance of the collection sewer system, and the needed contract services. Reports to the Public Works Director/City Engineer. • Public Works Project Manager – Assists in the formulation of SSMP policies and procedures. Direct studies, investigations, and the preparation of reports, budget and contractual agreements with private firms. Responsible for the day-to-day management and operation of the SSMP. Assists in directing engineering and management activities relating to the maintenance of the collection sewer system, and the needed contract services, printing and mailing of public education outreach program materials, and for procuring material and supplies needed for the day-to-day operation and maintenance activities. Reports to the Public Works Director/City Engineer. • Senior Civil Engineer – Has oversight of intra agency, clerical and field operation and maintenance staff. Responsible for overseeing implementation of the FOG program including point source control, inspection of industrial waste and grease generating facilities, and investigation of cases of illicit discharge of chemicals, debris, etc. into the public sewer. Reports to and can act on behalf of the City Engineer. • Stormwater Program Manager – Assist in the operation of the SSMP. Assists in coordination efforts for tracing, containing, and cleaning up of spills that reach storm drain system. As well as NPDES compliance and program management for FOG.

Reports to the Public Works Director/City Engineer.
• Engineering Aide – Assist in the operation of the SSMP. Assists in coordination efforts for tracing, containing, and cleaning up of spills that reach storm drain system. Reports to the Senior Civil Engineer.

2.4.3 Key Support Divisions
Other Divisions within the City as well as external agencies are currently and will continue to be responsible for carrying out some of the compliance actions called for by the WDRs for the SMD. The key support divisions and their responsibilities are described below:
• Administrative Services - Responsible for procuring equipment and as needed contract services for emergency sewer repair projects, printing and mailing of public education outreach program materials, and for procuring material and supplies needed for the day 16 to day operation and maintenance activities. Staffing the SO&M function and training of personnel. Also responsible for investigating spills related claims and litigations. • Building and Safety Division – Responsible for issuing permits for sewer connection and for the enforcement of the Plumbing Codes involving proper connection, maintenance of sewer house laterals and illegal discharges into the public sewers.

Responsible for subdivision plan checks to ensure compliance with the City standards for construction of new sewer collection systems.
• Las Virgenes Municipal Water District (LVMWD) – Currently a non-binding verbal agreement to assist exists between LVMWD and the City to assist in tracing, containing, and cleaning up of spills.
• Consolidated Sewer Maintenance District (CSMD) – An extension of LACDPW, CSMD is responsible for the sewer collection system operation and maintenance activities for the system. Responsible for the oversight of the Sewer Maintenance field maintenance personnel including the construction crews, gravity sewer system operation and maintenance crews etc. Responsible for maintenance activities of the sanitary sewer collection system including response to spills, sewer cleaning, construction and other activities as needed. Responsible for the operations and maintenance of pump stations and force mains. Reports to the Public Works Director/City Engineer.
• L.A. County Fire Department – Responsible for assisting with protecting the public during a spill event that expands into high use public travel ways and/or those that reach storm drains or water courses and spread the public risk to health and safety impacts. • L.A. County Sheriff’s Department - Responsible for operating the Emergency Operation Center for the entire City including handling after-hours service calls reporting spills, and pump station malfunction calls and forwarding those reports to the DPW.

2.4.4 Chain of Communication for Spill Reporting
The chain of communication for reporting spills during regular business hours is the responsibility of the Engineering Division; after hours are handled through the County of Los Angeles Hotline (888) Clean-LA. Please see the following flow chart for an illustration of the reporting process. The SSMP emergency response plan will be discussed in more detail in Chapter 6 of this document.

The chain of communication for reporting spills, from receipt of a complaint or other reliable information source to reporting to the appropriate regulatory agencies, is presented in Section

2.4.5. The city’s contact directory for communicating with both internal and external parties involved in responding and reporting an spill event is shown in Section 2.4.6. The spill emergency response plan will be discussed in greater detail in Chapter 6 of this document. 17 2.4.5 Spill Reporting Procedures Flow Chart
Normal Business Hours
*Normal Business hours are Monday through Friday from 6:30 AM to 5:00 PM.

After Hours
*After Hours are any hours that are not Normal Business Hours.

County
Dispatch
• Receives Call (Note: Call may be received by City staff, at which time the County would be notified)
• Dispatches Field Crew
SMD Field
Crew
• Responds to Spill
• Documents Field Spill Report
SMD
Supervisor
or Supt
• Reviews Field Spill Report
CIWQS Data
Submitter
• Request Additional Information from Field Staff, if needed • Enters Draft CIWQS Spill Report

CIWQS LRO
• Review Draft CIWQS Spill Report
• Certifies Report
County
Dispatch
• Receives Call
• Dispatches Field Crew
On-Call
Supervisor
or Supt
• Investigates Spill
Standby
SMD Field
Crew
• Responds to Spill
• Documents Field Spill Report
SMD
Supervisor
or Supt
• Reviews Field Spill Report
CIWQS Data
Submitter
• Request Additional Information from Field Staff, if needed • Enters Draft CIWQS Spill Report

CIWQS LRO
• Review Draft CIWQS Spill Report
• Certifies Report
18 2.4.6 City’s Contact Directory for Spill Responding and Reporting Responsible Party Name Telephone After Hours Cell
Phone Email (as applicable)
City Manager Nathan
Hamburger 818-597-7308 [email protected]
Public Works
Director/City
Engineer
Charmaine
Yambao 818-597-7360 [email protected]
Deputy Director of
Public Works Kelly Fisher 818-597-7338 [email protected] Public Works Project
Manager
Brian
Woodworth 818-597-7322 [email protected]
Stormwater Program
Manager Kelsey Reed 818-597-7300 818-383-3092 [email protected] Duty “On-Call”
Person LVMWD 818-251-2100 818-251-2100
L.A. Co. Pub. Wks.

Dept.
24-hour
Dispatch 626-458-4357 800-675-4357
L.A. County Sheriff 323-267-4800 323-267-4800
L.A. County Fire
Dept. 323-881-2455 323-881-2455
Co. Health Dept.
(After Hours) 213-974-1234 213-974-1234
Co. Flood Control 818-896-0954 626-458-4357
R.W.Q.C.B. (Region
4) 213-576-6600 213-305-2253
State OES 800-852-7550 800-852-7550
CSD of LACO 626-300-3308 800-657-4357
19 CHAPTER 3

LEGAL AUTHORITY

3.1 Legal Authority
Pursuant to the California Government Code, Sections 37100 and 54350, the City Council, as the local legislative body, may by ordinances and resolutions make and enforce all rules and regulations necessary for the administration of the City’s Sewer Operations and Maintenance SO&M plan.

Such actions include, but are not limited to: budgeting and the cleaning, repair, construction, reconstruction, rehabilitation, replacement, operation, and maintenance of collection sewers within the City’s System. This chapter highlights the City’s legal authority in compliance with the WDR, The City granted the County of Los Angeles the consent and jurisdiction to annex sewered portions of the City into the CSMD. By that action, the City has entrusted the operation and maintenance of its wastewater collection system to the CSMD. The City, however, still maintains full ownership and management responsibility of the City sewer system.

Consistent with the law, several ordinances have been established by the City Council to govern all aspects of the City’s SO&M plan. The legal authorities for specific areas stipulated in the WDR are covered in the Agoura Hills Municipal Code (AHMC). These are found in Article V (Sanitation and Health), Chapter 1 (Health Code), Section 5100 which adopted Title 11 of the Los Angeles County Code (LACo Code), entitled “Health and Safety Code”; Article V (Sanitation and Health), Chapter 2 (Sanitary Sewer and Industrial Waste), Section 5200 which adopted Title 20, Utilities, Division 2 of the LACo Code entitled “Sanitary Sewers and Industrial Waste Ordinance”; and Article VIII (Building Regulations), Chapter 1 (Administration), Section 8100 which adopted the 2019 edition of the California Plumbing Code, published by the International Association of Plumbing and Mechanical Officials; some of which are discussed below:

The LACo Code Section 20.24.080 requires that property owners be responsible for maintenance of their house lateral, including the elimination of cracks, tree roots, and other debris. Similar regulation is also found in LACo Plumbing Code.

3.1.1 Authority to Prevent Illicit Discharges into the sewer system - LACo Code Title 20, Sections 20.36.010 and 20.36.400, prohibits the illegal dumping of offensive or damaging substances such as chemicals, debris, etc. into the sewer system. LACo Code Sections

20.24.020, 20.24.200, 20.32.080, 20.32.650, prohibits various forms of illicit discharges to the sewer. The City, as one of the CSMD cities, benefits from the districts Infiltration/Inflow (I/I) control program, the sewer line cleaning and maintenance program, which includes closed circuit television (CCTV) inspection and other mechanisms to detect I/I. These codes constitute the City’s legal authority to prevent illicit discharges into the sewer system.

3.1.2 Authority to collaborate with storm sewer agencies to coordinate emergency spill responses, ensure access to storm sewer systems during spill events, and prevent unintentional cross connections of sanitary sewer infrastructure - The City is part of the Consolidated Sewer Maintenance District, which is managed by LACPW. All City spills 20 will flow to the City storm drain system, and then to the County flood control system.

CSMD and the Flood Control District are both part of the Los Angeles County Public Works and staff have direct contact with one another to coordinate and access additional resources and support, if needed.

3.1.3 Authority to require Sewers and Connections be properly designed and constructed - LACo Code Title 20, Sections 20.32.330 and 20.32.340 require that the design of new main-line sewers and pumping plants respectively comply with Part 3 (Design Standards) of Chapter 20.32 of the Code. Section 20.32.350 requires that the design of new house laterals also conform to the same design standards unless otherwise covered by the Plumbing Code. Section 20.32.580 requires the construction of a collection sewer system to conform to all of Division 2 of Title 20, the Standard Specifications for Public Works Construction and by the Special Provisions and Standard Plans, all on file in the office of the City Engineer. Inspection of new main-line sewers and pumping plants to ensure proper construction is covered under Section 20.30.590.

3.1.4 Authority to Ensure Access for Maintenance, Inspection, or Repairs - LACo Code, Title 20, Division 2 gives the City the legal right to set requirements to allow unrestricted maintenance access to public sewer infrastructure located in private property. In accordance with Section 20.32.430, the access is secured through City’s enforcement of the requirement for legally recorded sewer easements around all public sewer appurtenances located in private properties. Sewer easements are detailed on the sewer construction plans and are thoroughly reviewed by the City and the County for adequacy in size and accuracy of alignment during the subdivision map and plan check process. Such easements must have sufficient access for the movement of equipment and materials for both routine and emergency repair or construction work on the system.

LACo Code, Section 20.24.090 givesthe Co. DPW and the City Engineer the legal authority to inspect main-line sewers, sewage pumping plants, interceptors etc., as often as they deem necessary, to ascertain whether such facilities are maintained and operated in accordance with the provisions of Division 2 of Title 20.

3.1.5 Authority limiting discharge of FOG and other debris that may cause blockage – The Plumbing Code requires the installation of grease interceptors at restaurants and other FSE that generate grease in the City. Section 714.1 of the Plumbing Code prohibits the discharge of FOG and other substances that may, among other things, clog, obstruct, fill, or necessitate frequent repairs, cleaning out or flushing of sewer facilities, in the City’s sewer system. This prohibition is also contained in Title 20, Section 20.36.400. Also, Section 20.36.560 gives authority to the County and the City to require the installation of treatment facilities, including grease interceptors, at any facility that generates FOG in the amount that will damage or increase the maintenance costs of the wastewater collection system.

3.1.6 Authority to enforce a violation of sewer ordinances, service agreements, and/or other legally binding procedures – Under Section 20.24.100 the City Engineer is empowered to enforce all the requirements prescribed in Division 2 of Title 20 and in accordance with Section 20.24.110 may delegate this authority. Section 21 20.24.160 allows the application of criminal penalties for any violations of the Sewer and Industrial Waste Ordinances. Section 20.24.170 provides for additional enforcement for continued violations.

3.1.7 Authority to fund operations and maintenance of the sewer system - Sections

20.40.040 and 20.40.045 of Title 20 provides for the levy of annual service charge and additional annual service charge, respectively, to fund the maintenance, operation, reconstruction and construction of relief sewers in the CSMD including the City within the limits of the Operations and Maintenance provisions. This provision establishes a financial plan to ensure the ongoing operations and maintenance functions for the sewer system.

Under current authority there is no identified financial plan or vehicle for funding capital projects addressing capacity increase needs within the sewer system.

3.1.8 Authority to obtain easement accessibility agreements for locations requiring sewer system operations and maintenance – As the agency responsible for operations and maintenance of the City’s sewer system, the CSMD has the authority to obtain easement accessibility agreements for sewer system operations and maintenance as outlined in LACo Code Sections 20.32.240 – Sewer easement processing fees and 20.32.430 – Sewer easement requirements.

The Codes, standard plans, specifications and other materials cited in this chapter are filed at the offices of the City Engineer as well as the City Clerk and are available at this LINK. 22 CHAPTER 4

OPERATION AND MAINTENANCE PROGRAM

4.1 City Sewer Mapping System
The City maintains as-built plans of City sewer facilities. Data on these plans, such as location, alignment, pipe material, size, etc., are stored in the drawing file system at City Hall. Information generated on the Computer Aided Design & Drafting (CADD) system, and printed to map sheets, is stored in the City’s engineering file server. Periodic updates of these maps are scheduled by the City DPW when it is necessary to reflect changes in the system. These maps are included in Appendix O.

Data on the City’s as-built sewer plans, such as system location and alignment, pipe material, size etc., are also stored in the CSMD CADD and GIS system. Information generated by CADD is printed on Index Map Sheets stored by LACDPW, Sewer Maintenance Division, located at 1000 South Fremont Avenue, Alhambra, California. The Index Maps are also kept at the CSMD field maintenance yards. The maps are updated, as necessary, to reflect any changes in the system.

Additionally, CSMD provides public access to up-to-date sewer mapping through the County’s website. Within GIS, the Districts maintain a mapping system that includes sewer features such as pipe or manhole location, diameter, material, flow direction, etc. The system includes map base layers such as aerial images, streets, parcels, and storm drain systems also available from other Divisions within the County and other governmental agencies. The maps are regularly updated to reflect any changes in the system.

LA County Sanitary Sewer Network GIS Map – CSMD:
• https://dpw.lacounty.gov/smd/sewernetwork/
Operation Maps
• https://dpw.lacounty.gov/sewer/Page_15

4.2 Preventive Maintenance Program
The City is within the CSMD, and therefore depends totally on the CSMD for the operation and maintenance of its collection sewer system. CSMD’s Operation and Maintenance programs applied district-wide and described in details in the SMD SSMP are applicable in the City. The CSMD Santa Clara Sub Yard (See Appendix ‘D’ in the SMD SSMP) located at 21014 Golden Triangle Road in the City of Santa Clarita provides sewer services to the City. However, personnel from the other five sewer maintenance yards, also shown in Appendix ‘D’, provide after hour services to the City such as stand-by, callback, and other sewer emergency services. The maintenance equipment utilized within the City is owned by the CSMD. A complete inventory of the CSMD equipment assigned to each County maintenance yard is presented in Appendix ‘A3’ and Section

4.5 in the SMD SSMP.
23 The City’s maintenance programs are funded through levying of an annual sewer service charge (currently at $41.50 per equivalent single-family dwelling unit otherwise called a sewage unit (s.u.). This is included in the $50.50 per s.u. levied by the CSMD and collected with the annual tax bills of property owners in the City that are within the CSMD. The $9.00 differential is evenly split to fund the accumulative capital outlay and condition assessment programs described in Section 4.3. The total annual revenue generated for the various sewer programs through the $50.50 per s.u. charge is approximately $402,990. These funds are managed and administered by the County and reviewed and adjusted annually to raise sufficient revenues for the maintenance programs. The proposed sewer service charge increases to the CSMD was approved on June 24, 2025 with three consecutive year increases beginning FY 2025-26 to $49.50, FY 26-27 to $58.50, and FY 27-28 to $68.50.

The following is a summary of the CSMD preventive maintenance activities implemented by the district within the City:

4.2.1 CCTV Inspection — Closed-circuit televisions (CCTV) inspections of sewer pipes are used to investigate and diagnose issues. Maintenance history, past spill records, sewer line locations, and age are used to determine which pipes are televised. Additionally, the Condition Assessment Program is implemented by the County to perform CCTV inspections and structurally rate sewer infrastructure. The County’s systematic approach in the Condition Assessment Program aims to conduct CCTV inspections and evaluate the structural integrity of about 500 miles of sewer infrastructure annually. The inspections are prioritized based on the frequency of spills per 100 miles in each jurisdiction.

4.2.2 Sewer Line and Manhole Inspection – The interior and lid cover of manholes are inspected semi-annually for any structural defects, sewage flow condition, presence of vermin or rodents, deleterious industrial waste, odors and any signs of unusual settlement around the manholes and along sewer alignments. Higher-frequency inspections and maintenance are conducted for known problem areas, including areas with tree root problems. Sewer lines are also inspected via CCTV on a routine schedule, as described in Section 4.2.1

4.2.3 Gas Trap Manholes and Siphons – On a monthly basis, these facilities are inspected and cleared of any stoppages or flow restrictions.

4.2.4 Drop Manholes – These facilities are inspected s e m i a n n u a l l y and cleared of stoppages and flow restrictions on variable frequencies based on prior inspection records.

4.2.5 Sewer Line Cleaning – Sewer lines are cleaned by hydro jet or rodding. Frequency of cleaning is based on inspection records. Sewer lines known to accumulate grease, garbage grinds or sand are put on monthly, quarterly, or semi-annual cleaning schedule and those prone to root growth are periodically rodded or chemically treated.

4.2.6 Root Foaming — Root foaming is performed on main sewer lines based on root intrusion and need, typically associated with overflowing. The frequency of root foaming is initially 1 year, then increases to an 18-to-24 month frequency.
24 4.2.7 Periodic Maintenance — Periodic Maintenance (PMs) are sites that require higherfrequency cleanings due to maintenance issues. These “hot spots” are identified in the field during maintenance and inspections of sewer facilities and are often caused by debris, root intrusion, or other factors. Segments that experience spills are also added under periodic maintenance.

4.2.8 Vermin and Odor Control — If sewers and structures are observed to show evidence of infestations during an inspection or if a service request or complaint is received, the vermin are dusted or baited and insects are chemically treated.

4.2.9 Sewage Pump Stations – All pump stations are equipped with telemetry/alarm system and are inspected once a week. Pumps and motors are lubricated, control mechanism and valves are checked and adjusted as necessary, and equipment is repaired or modified as required.

4.2.10 Work Scheduling – CSMD work orders within the City are generated and tracked by the LACDPW’s Maximo Maintenance Management System (MMS). CSMD field crews activities are recorded in various forms such as service requests, cleaning reports, sewer maintenance daily reports, manhole adjustments, spill report forms, etc., and finally stored in the MMS. The reports are made available to the City upon request.

4.3 Rehabilitation and Replacement Plan
The City’s sewer collection systems are in the CSMD, and the City participates in the District’s Accumulative Capital Outlay (ACO) Program and the District’s Sewer Condition Assessment Program.

4.3.1 Accumulative Capital Outlay Program of the CSMD – Sewer served properties, within the CSMD, are levied an annual charge of $9.00 per s.u. for sewer collection system rehabilitation and replacements. This annual charge was approved by the LA County Board of Supervisors to be increased in FY 2025-26 to $15.00 per s.u., in FY 2026-27 to $20.00 per s.u., and in FY 2027-28 to $24 per s.u. The $9.00 per s.u. charge is also a component of the total $50.50 per s.u. described previously. The program is managed and administered by the LACDPW.

Under the ACO program, any portion of the sewer system found to be structurally deficient through routine inspection, sewer emergency response or condition assessment program is immediately repaired as an emergency repair project, or documented in a prioritized list of future short and long-term ACO sewer rehabilitation and replacement project (See Table 8- 1 in the SMD SSMP). However, LACDPW would refer those portions of the system that have capacity related problems, especially hydraulic deficiencies resulting from over development or changes in zoning to the City for appropriate corrective action. A detailed discussion of the CSMD ACO Program is contained in Chapter 8.4.1 of the SMD SSMP.

4.3.2 Condition Assessment Program - The existing sewer pipes, range from 8 to 15 inches in diameter (96% are 8-inch diameter) and are predominantly vitrified clay pipe material.

The majority of the City’s sewer pipes were installed between the 1960’s and 2007.

This results in a current sewer system age ranging from 18 years to 65 years. Naturally, 25 as these sewer lines age, structural problems such as cracks, joint separation, root intrusion, etc. will develop. To ensure that these problems are properly mitigated, the WDR requires that the City have a program in place to minimize and correct them and that the program is well funded.

The City participates in the CSMD’s ACO/Condition Assessment Program. Sewer served properties, within the CSMD, are assessed an annual fee of $9.00 per s.u. for sewer system condition assessment. This annual charge was approved by the LA County Board of Supervisors to be increased for three consecutive years starting in FY 2025-26 as described in the section above. This charge is part of the current annual sewer service charge of $50.50 per s.u. described previously. Under this program, the entire Sewer Collection System within the City was inspected by Close Circuit Television (CCTV) to assess the condition of the pipes between 2008, 2013, and 2019. A map of the CCTV project within the City is provided in Appendix ‘N’. The County DPW is responsible for the management and administration of the program and funds.

4.4 Training for Field Operations Personnel and Contractors All personnel needed for the operation and maintenance of the City’s sewer system are employed by the LACDPW. The training of CSMD personnel is a function of the County and not the City.

The training methodologies utilized by the County are contained in Section 4.4 of the SMD SSMP.

Training topics include General Order Requirements, Spill Emergency Response and Drills and Spill Volume Estimation, and CIWQS Reporting. The City does not have any formalized training for contractors doing work within the City. However, City’s sewer construction projects are awarded to carefully selected contractors with well trained and qualified personnel for any given project. The designed plans and specifications for City’s sewer construction projects contain detailed instructions on the City’s permitting requirements, standards, and policies that must be adhered to by contractors doing work within the City.

CSMD staff attend structured collection system training classes or seminars given by other agencies including California Occupational, Safety and Health Administration (CALOSHA), California Water Environment Association (CWEA), County Sanitation Districts’ (CSD), etc. This is to keep them abreast with the latest information in the industry on how to safely and efficiently carry out their tasks. Additionally, the City and CSMD personnel responsible for the electronic CIWQS reporting are trained for proper submittal.

4.5 Equipment Maintenance and Replacement Policy
Equipment utilized in the maintenance of the City’s sewer facilities is owned by the CSMD.

LACDPW has full responsibility for the maintenance and replacement of this equipment. The LACDPW Equipment Replacement Policy is described in Chapter 4.5 of the SMD SSMP.

The City also has a comprehensive equipment maintenance program. Equipment is regularly checked, adjusted, repaired or replaced as necessary. However, major fixed assets are replaced when they meet or exceed the City's established fixed assets replacement criteria based on the 26 equipment age, mileage, hours of use, repair history, safety, etc. Replacement of or additions to the major assets are done through the annual budget process of the City.

CHAPTER 5
28 DESIGN AND PERFORMANCE PROVISION

5.1 Design and Construction Standards and Specifications The City requires that all sewers be designed in accordance with Los Angeles County standards.

The County DPW has Standard Plans and Specifications for Construction of Sanitary Sewers and appurtenances to ensure that sewer lines and connections are properly designed and constructed.

The County DPW specifications, by reference, incorporate the Standard Plans and Specifications for Public Works Construction (“Greenbook”), Special Provisions, and Standard Drawings. In addition, County DPW has other publications such as the Private Contract Sanitary Sewer Procedural Manual, Guidelines for the Design of Pump Stations etc. to ensure consistency in the design of wastewater collection systems within unincorporated County areas. The City requires that these publications also be followed in the design of the sewer system within the City. To further assure that sewer facilities are properly designed and constructed, the City requires that plans are designed by licensed engineers and provides thorough review of plans, by City and SMD, prior to approval for construction and inspection of the actual construction work. The SMD plan review is performed from the stand point of maintenance only.

Section 8.2 of the SMD SSMP provides further detail regarding the design criteria and construction standards necessary to support hydraulic capacity.

5.2 Procedures and Standards for Inspection and Testing The City is responsible for assuring sewers are designed and constructed to standard. The City provides inspection for the installation of new and rehabilitation of deteriorated public sewer facilities within City jurisdiction. The inspectors are also provided with adequate materials to perform their jobs, including the Standard Specifications for Public Works Construction, the Standard Plans for Public Works Construction, and the Public Works Inspectors’ Manual. The City also requires the preparation and submittal of "As-Built" plans of completed projects prior to final approval and acceptance of the project as public infrastructure.

The inspection of sewer rehabilitation projects under the ACO program are conducted by County DPW inspectors.

In compliance with SMD policy, the City also requires that all newly constructed pumping stations be inspected by experienced SMD Electro-Mechanics prior to transferring such facilities to SMD for maintenance.
29 SPILL EMERGENCY RESPONSE PLAN

6.1 Spill Emergency Response Procedure
The City, as a member of the CSMD, relies on the services of SMD for sanitary sewer spills within the City. Therefore, the SMD Spill Emergency Response Procedure described in Appendix F of the SMD SSMP are utilized by the District in the City. Furthermore, the County DPW 24-hour emergency phone number 1-800-675-HELP (4357) is readily available to City staff and residents to use in promptly notifying County DPW staff of spill events in the City.

The City provides 24-hour emergency response services to investigate and act upon notifications received from citizens or from telemetry systems or from other valid sources. Personnel are available 24-hours a day of the year to receive and act on any calls or automated alarms related to problems in the sewer system, including spills.

The City’s detailed Spill Emergency Response Plan is included as Appendix K of this document.

This plan has been tailored to mirror the procedures outlined in the SMD Spill Emergency Response Plan. Annually, the City will review and assess the effectiveness of the Spill Emergency Response Plan and update it as necessary.

6.1.1 Regulatory Agencies Notification and Time Frame - The SMD is responsible for reporting of spills to appropriate regulatory agencies for the City. As discussed in Chapter 2, spills that occur in the City are reported to the County by telephone or by telemetry at the pump stations. Upon receipt of such call, County Officials follow the notification guidelines contained in Appendix F of the SMD SSMP. A notification and timeframe matrix is attached as 6.1.7.

6.1.2 Procedure to ensure that Staff and Contractors are aware and appropriately trained to follow Spill Emergency Response Plan - This is mainly the function of the County DPW. However, City staff is familiar with the SMD Emergency procedures which are included in Appendix ‘F’ in the SMD SSMP. City staff will cooperate with CSMD during a spill event, as necessary.

When City staff is involved in a spill response, the Spill Emergency Response Plan (Appendix ‘K’ in this document) is a procedural and training guide. The crew responding to a spill emergency is required to stop the spill, contain it as soon as possible, and ensure that the facility or area is cleaned up and returned to normal operation. The agencies to be notified, method and time frame for notification are presented in Section 6.1.7. The relevant data about the spill such as location, volume, agencies notified, etc. is recorded in field report forms (see Appendix ‘K’) and later stored in a computer file. All responding field personnel are trained to be conversant with these procedures and to accurately report all spill events.

6.1.3 Procedure to Address Emergency Operations such as Traffic Control and other Necessary Response Activities - The City does not play a significant role in this function.

It is performed by County DPW staff or contractors doing emergency repair spill related 30 work for the County or the City. The County Fire and County Sheriff departments also play active roles in the control and protection of the general public during emergency spill operations. The Districts’ field personnel and emergency contractors are trained in traffic and crowd control and equipped with tools such as traffic cones, yellow tape, flashing lights, and high-visibility uniforms.

6.1.4 Program to Eliminate or Minimize Discharge of s pills into waters of the United States - This is one of the main functions performed by the County DPW for the City.

Some of the methods include the use of sand bags to contain spills, absorbent tube socks to prevent spill discharge into storm drain catch basins, and the use of vacuum trucks to suck up contained spills and dump effluent back into the collection system at other safe locations The roles played by the City are limited to ensuring that the City’s collection system has sufficient capacity for all operating conditions and making sure that the County DPW staff are promptly notified of spill events when they do occur.

6.1.5 Field Response Report Protocol and Forms - Appendix ‘K’, of this Spill Emergency Response Plan, describes the procedures and reporting activity to be accomplished during an actual spill event in the physical setting in which it occurs. Corrective actions and reporting guides are described and an investigation and reporting format are included for reference use.

6.1.6 Spill Flow Estimation Tables and Photographs - Example spill flow estimation templates (guides) follow:
[Courtesy of the California Water Environment Association] Collection System Collaborative Benchmarking Group
Best Practices for Sanitary Sewer Overflow (SSO) Prevention and Response Plan
Response Plan
31 Collection System Collaborative Benchmarking Group
Best Practices for Sanitary Sewer Overflow (SSO) Prevention and Response Plan
32 The formula used to develop Table A measures the maximum height of the water coming out of the maintenance hole above the rim. The formula was taken from hydraulics and its application by A.H. Gibson (Constable & Co. Limited).

Example Overflow Estimation:

The maintenance hole cover is unseated and slightly elevated on a 24” casting.

The maximum height of the discharge above the rim is 5 ¼ inches. According to Table A, these conditions would yield an SSO of 185 gallons per minute.

FLOW OUT OF M/H WITH COVER IN PLACE
Height to be measured
This sanitary sewer overflow drawing was developed by Debbie Myers, Principal Engineering Technician, for Ed Euyen, Civil Engineer, P.E. No. 33955, California, of County Sanitation District 1.

Collection System Collaborative Benchmarking Group
Best Practices for Sanitary Sewer Overflow (SSO) Prevention and Response Plan
33 Collection System Collaborative Benchmarking Group
Best Practices for Sanitary Sewer Overflow (SSO) Prevention and Response Plan
34 The formula used to develop Table B for estimating SSO’s out of maintenance holes without covers is based on discharge over curved weir -- bell mouth spillways for 2” to 12” diameter pipes. The formula was taken from hydraulics and its application by A.H. Gibson (Constable & Co. Limited).

Example Overflow Estimation:

The maintenance hole cover is off and the flow coming out of a 36” frame maintenance hole at one inch (1”) height will be approximately 660 gallons per minute.

FLOW OUT OF M/H WITH COVER REMOVED (TABLE "B")
Height to be measured
This sanitary sewer overflow drawing was developed by Debbie Myers, Principal Engineering Technician, for Ed Euyen, Civil Engineer, P.E. No. 33955, California, of County Sanitation District 1.

Collection System Collaborative Benchmarking Group
Best Practices for Sanitary Sewer Overflow (SSO) Prevention and Response Plan
35 Collection System Collaborative Benchmarking Group
Best Practices for Sanitary Sewer Overflow (SSO) Prevention and Response Plan
36 The formula used to develop Table C is Q=CcVA, where Q is equal to the quantity of the flow in gallons per minute, Cc is equal to the coefficient of contraction (.63), V is equal to the velocity of the overflow, and A is equal to the area of the pick hole.
2 If all units are in feet, the quantity will be calculated in cubic feet per second, which when multiplied by 448.8 will give the answer in gallons per minute. (One cubic foot per second is equal to 448.8 gallons per minute, hence this conversion method).

Example Overflow Estimation:

The maintenance hole cover is in place and the height of water coming out of the pick hole seven-eighths of an inch in diameter (7/8") is 3 inches (3”). This will produce an SSO flow of approximately 4.7 gallons per minute.

FLOW OUT OF VENT OR PICK HOLE (TABLE "C")
Height to be measured
This sanitary sewer overflow drawing was developed by Debbie Myers, Principal Engineering Technician, for Ed Euyen, Civil Engineer, P.E. No. 33955, California, of County Sanitation District 1.
2 Velocity for the purposes of this formula is calculated by using the formula h = v squared / 2G, where h is equal to the height of the overflow, v is equal to velocity, and G is equal to the acceleration of gravity. 37 38

6.1.7 Regulatory Agencies Notification and Time Frame
[As noted in Section 6.1.1, the County does all reporting] Spill
Category
Type or
Description Agencies to be Notified
Type of Notification & Time Frame
Telephone/Fax
ASAP, but no later than 2
hours after spill
awareness
Written
Report/*Online
Database
1 A spill of any
volume that
discharges to
surface water, a
drainage
conveyance, or
channel and was
not captured.

County Health Department
Flood Maintenance Division
State Office Emergency Serv.

Regional Wtr. Qual. Cntrl. Bd.

St. Wtr. Resources Control Bd.
626-430-5420-Bus. Hrs
213-974-1234-Aftr Hrs
818-896-0594-Bus. Hrs
800-852-7550 [24/7]
213-576-6600-Bus. Hrs
213-576-6650-Aftr Hrs
N/A
2-Hour Notification:

Regulatory Agencies
(CAL OES) must be
notified within two hours
of ANY discharge of
sewage
(untreated/partially
treated) to a surface water
or drainage channel (that
is not fully captured and
returned to sewer).

Within 3 Business Days
of Notification: Enter
draft report in CIWQS.

Within 15 Calendar
Days of Conclusion of
Response/Remediation:

Must be certified by LRO
using CIWQS.

Within 45 Calendar
Days of Conclusion of
Response/Remediation:

Submit Spill Technical
Report for spills 50,000
gallons or greater
Within 90 Calendar
Days of Conclusion of
Response/Remediation:

Submit Amended
Certified Spill Report (if
necessary)
39 2
A discharge that
is greater than
1,000 gallons that
did not discharge
to surface water.

County Health Department
Flood Maintenance Division
State Office Emergency Serv.

Regional Wtr. Qual. Cntrl Bd.

St. Wtr. Resources Control Bd.
626-430-5420-Bus. Hrs
213-974-1234-Aftr Hrs
818-896-0594-Bus. Hrs
800-852-7550 [24/7]
213-576-6600-Bus. Hrs
213-576-6650-Aftr Hrs
N/A
2-Hour Notification:

Regulatory Agencies (Cal
OES) must be notified
within two hours of ANY
discharge of sewage
(untreated/partially
treated) 1,000 gallons or
greater.

Within 3 Business Days
of Notification: Enter
draft report in CIWQS.

Within 15 Calendar
Days of Conclusion of
Response/Remediation:

Must be certified by LRO
using CIWQS
Within 90 Calendar
Days of Conclusion of
Response/Remediation:

Submit Amended
Certified Spill Report (if
necessary)
3 A spill that is
less than 1,000
gallons but
greater than 50
gallons that does
not discharge to
surface water.

County Health Department
St. Wtr. Resources Control Bd.
626-430-5420-Bus. Hrs
213-974-1234-Aftr Hrs
N/A
Within 30 days past the
end of the month in which
the spill occurred:

Submit certified Report
Within 90 Calendar Days
of Conclusion of
Response/Remediation:

Submit Amended Certified
Spill Report (if necessary)
4 Less than 50 gallons,
from or caused by a
sanitary sewer
system that does not
discharge to surface
water.

County Health Department
St.Wtr. Resources Control Bd.
624-430-5420-Bus. Hrs
213-974-1234-Aftr. Hrs
N/A
Within 30 days past the
end of the month in which
the spill occured:

Submit certified report
By February 1 after the
end of the calendar year in
which the spill occurred:

Submit certified report, in
acceptable electronic
format, of all recordkeeping
of spills.
40 Private
Lateral
Spill
A discharge from
a privately owned
lateral.

County Health Department
St. Wtr. Resources Control Bd.
626-430-5420-Bus. Hrs
213-974-1234-Aftr Hrs
N/A
Within 30 days past
the end of the month
in which the spill
occurred:

If reporting, enter
into CIWQS as a
“Private Lateral
Sewage Discharge”
and identify
responsible party, if
known (not
LACPW). Must be
certified by LRO
using CIWQS.

N/A No spill in a
calendar month
St. Wtr. Resources Control Bd. N/A
Within 30 days past the
end of the month:

Certify “No Spill”
certification statement.

The LRO or designee
must report using
CIWQS.
24/7 = 24 hours per day & 7 days per week
41 CHAPTER 7

SEWER PIPE BLOCKAGE CONTROL PROGRAM

7.1 Public Education and Outreach Program
The City currently benefits from the County DPW public education outreach program. Under this program information on proper disposal of Fats, Oils and Grease (FOG) and other spill prevention measures such as the installation of backwater valves, house lateral maintenance etc. is disseminated to CSMD member city residents through publication of annual reports, brochures and individual notices to property owners. County DPW sewer maintenance and industrial waste management program personnel also assist in passing useful information on spill prevention and FOG on to home and business owners. County DPW, in addition, has the annual reports posted on its home web page (http://dpw.lacounty.gov/smd/smd) for easy access to internet users. • Community Events: SMD participates in resource fairs, park events, and Earth Day-themed events, where staff distribute FOG brochures and answer questions from the community. • Website Resources: The FOG page on SMD’s website provides a comprehensive list of FOG do’s and don’ts: https://pw.lacounty.gov/SMD/grease/Index.cfm. • Inspections: During inspections of food service establishments (FSEs), FOG inspectors provide educational materials on best management practices (BMPs) for grease traps and interceptors. Newly permitted FSEs also receive BMP materials.

Outreach is scheduled based upon opportunities for public engagement and frequency of FSE inspections. The Community and Government Relations Group (CGRG) keeps track of all the events the County participates in annually, providing a summary of events at the end of the year.

To complement County efforts, the City proactively reaches out to users of its sewer system regarding the community’s sewer pipe blockage control program. Information on proper disposal of FOG and other spill prevention measures, including installation of grease traps, backwater valves, sewer lateral maintenance, etc. is disseminated through publication of brochures, articles in newsletters, individual notices to property owners, and with business license renewals, on a schedule. These notifications provide descriptions of grease control efforts that can be undertaken by homeowners and businesses alike. Additionally, the DPW utilizes personal contacts with home and business owners by its field crews and the code enforcement inspectors as conditions warrant.

These methods are usually effective in relaying information on proper disposal of FOG and other spill prevention methods to the community. Also provided in this chapter are some BMPs for reducing FOG in the wastewater collection system.

Additionally, other effective ways to communicate with the public are being considered. These include use of the City's home web page, use of local radio and cablevision announcements, and the exchange of outreach information between agencies.

FOG in the local sewer system can be a prime contributor to a spill and its corresponding health and safety impacts. Related health and safety issues can also result from the discharge of pharmaceuticals and pesticides into the sanitary sewer system. Although not usually a causative 42 factor in sewer spills, these chemicals can be toxic and have disruptive environmental and biological effects. Discharges of such chemical compounds into the sewers should also be avoided and addressed in the education and outreach program. (“No drugs or household pesticides down the drain” is a compatible health and safety advisory).

7.2 Disposal Methods for FOG Generated within the City Sewer System This function is performed by the CSMD staff on behalf of the City. The methods used by County DPW are contained in Section 7.3 of the SMD SSMP.

7.3 Legal Authority to Prohibit Discharges to the System and Identify Measures to Prevent Spills and Blockages Caused By FOG
Legal authority to prohibit discharges of FOG into the sewer system is discussed in Chapter 3 of this document. Requirements for grease interceptors at food establishments to prevent the discharge of grease to the collection sewer system and educating the public on proper disposal methods for FOG are also discussed elsewhere in this chapter.

Discharges from industrial classification facilities are usually controlled under the terms of an industrial wastewater discharge permit, which is issued and monitored by the local sewering agency.

7.4 Requirement to Install Grease Removal Devices, Design Standards, Maintenance Requirements, BMP Requirements; Record Keeping and Reporting Requirements
The County DPW, under a separate agreement (Appendix ‘P’) with the City, is charged with the responsibility of enforcing the County’s Sanitary Sewers and Industrial Waste Ordinance in the City. The Industrial Waste Program of the County is managed by the Environmental Programs Division (EPD) of County DPW. The design standards for grease removal devices and all requirements imposed on industrial waste facilities that discharge waste or FOG into the City’s sewer system are similar to those imposed in the Unincorporated County and as presented in Chapter 7.5 of the SMD SSMP.

The City Building Official is authorized to monitor and enforce the terms of the Plumbing Code and the Public Health Code, relative to domestic waste disposal from residential and commercial facilities within the community.

The County DPW is charged with reviewing, permitting and inspecting existing industrial waste facilities that discharge into the sanitary sewer system in the City. Pretreatment devices are required for industrial waste generating facilities, including restaurants and other FSE. Grease removal devices are required to be designed, approved, installed and operated in a manner to control discharges of FOG into the sanitary sewer system, They are also to ensure that the facilities do not create nuisances, menaces to the public peace, health or safety hazards, or adverse impacts on the public sewerage system, soil, underground and/or surface waters. If there is a FOG related problem associated with an industrial waste permit, the City will take enforcement action against 43 the permittee.

If during inspection of the sanitary sewer system, SO&M personnel determine that a FOG related problem exists and is traceable to a domestic sewage source of such character that is not satisfactory, under the PMC, pretreatment could be required or the discharge required to be eliminated. Domestic waste containing FOG can lead to spills which are public nuisances, and California Health and Safety Code Division 5, Part 3, Chapter 6, Article 2 can also be used to impose appropriate domestic sewage discharge requirements.

The effectiveness of any grease removal devices is dependent upon their routine maintenance and monitoring/inspection for conformance with its intended purpose. Regular inspection and maintenance activity logging with quarterly reporting are required.

Permit conditions require:
• GIs to be cleaned at least once every three months
• FSEs with grease traps are required to perform daily maintenance

7.5 A u t h o r i t y to I n s p e c t G r e a s e P r o d u c i n g F a c i l i t i e s, E n f o r c e m e n t A u t h o r i t i e s, a n d Evidence of Adequate Staffing To Inspect and Enforce the FOG Ordinance
LACO Code, Section 20.24.090 and 20.36.400 gives the County DPW the legal authority to inspect grease producing facilities for compliance with permit requirements. In accordance with the aforementioned agreement, the County DPW is responsible for issuing the permits and for the inspection of these facilities for compliance with terms of their permit. County DPW in concert with the City Engineer is also responsible for the enforcement of all industrial waste permit and Code violations in the City.

The County DPW has adequate staff to conduct inspections of the few pre-treatment facilities at the permitted FSE connected into the city sewer system. The funding mechanism now in place allows for increases in permit and other services charges to hire additional staff, if necessary. This program is discussed further in Section 7.6 of the SMD SSMP.

7.6 Cleaning Schedule for Identified FOG Prone Sewer Segments This function is performed by the CSMD for the City. The methods used by CSMD staff are described in Section 7.7 of the SMD SSMP.

Between 2021 and 2024, about 80% of the total spill events that occurred within the CSMD were attributed to roots, debris, grease, pipe structure failure and pump station failure as either a primary or secondary cause. FOG prone sections of City’s collection system, otherwise called "hot spots,” are identified during routine maintenance operations and investigation of stoppages resulting in a spill event. These “hot spots” are typically cleaned by hydro jetting and rodding or cutting if roots are encountered. Those portions of the system found to have persistent FOG problems are inspected and cleaned more frequently, depending on the magnitude of the problem. Furthermore, segments of the collection system with persistent FOG problems are referred to the DPW for 44 additional evaluation and corrective actions.

7.7 Source Control Measures Developed and Implemented to Address FOG Issues This function is performed by the CSMD for the City. The methods used by CSMD staff are described in Section 7.8 of the SMD SSMP.

The County provides pretreatment guidelines to FSEs, offering guidance on how to adequately select, size, and install a pretreatment device based on the amount of grease produced. The maintenance of these devices is outlined in the Industrial Waste Discharge Permit (IWDP) to ensure proper operation and functionality. Under the IWDP, the County or City may require upgrades to grease interceptors if maintenance is inadequate or if the interceptor is too small to handle the waste stream.

The EPD conducts routine inspections of FSEs and inspects new establishments. Investigations are also performed when spills occur. Upon investigation, the EPD may make adjustments to the permit and treatment requirements to prevent such incidents and/or place the impacted area under periodic maintenance as described in the SSMP Section 4.2.7. Under the Industrial Waste Discharge Permit (IWDP), the County or City may modify the permit and its conditions and limitations as necessary to ensure proper waste disposal.

7.8 Some BMPs for Fats, Oil and Grease
Examples of some BMPs for local application are listed on the following pages. 45 Some Best Management Practices (BMPs) for Fats, Oils, and Grease Residual fats, oils and grease (FOG) are by-products that food preparation and food service establishments and automotive service facilities and machine shops must constantly manage.

Typically, FOG enters a facility’s plumbing from wash sinks and floor drains during daily operations. Sanitary sewer systems are not designed or equipped to handle accumulating FOG on the interior of sewer collection system pipes due to unmanaged – unmaintained discharges.

Keeping FOG materials out of the plumbing system, by reasonable methods, is an important factor. The following are suggestions for proper FOG management:

Bulk or Dry Clean-Up
• Practice bulk and dry materials cleanup before using wet methods that use water.
• Remove bulk or other solid food and
grease laden substances into a
suitable container before rinsing or
washing the initial containers or
surfaces that will drain into the
plumbing system.
• Keep drain screens in place and fully
serviceable to avoid clogging drains
or accumulating FOG or grit on the
interiors of pipes.
• Do not pour grease, fats, or oils down
the drain nor place food scraps in the
drain.
• Use food grade paper to soak up oils
and grease and dispose of
appropriately.
• Use paper towels to wipe down
surfaces and work areas. Cloth
towels require washing and thereby
introducing FOG back into the drains.
• Success of bulk or dry clean-up is
dependent upon the behavior of
individuals and their access to tools
and materials for use in removing
bulk and dry materials before
washing.

Spill Prevention
• Preventing spills reduces the amount
of waste that will require clean-up.
• A dry surface work place is safer for
everyone in avoiding slips, trips and
falls.
• Capture bulk or dryer materials and
place them into an appropriate
container.
• Empty containers before they are full
to avoid spills.
• Cover any FOG container before
transporting to the rendering storage
container.
• Provide employees with proper tools
to transport materials without
spilling.

Maintenance
• Whatever method(s) are being used to
collect, filter and store FOG, ensure
that equipment is regularly
maintained.
• Employees should be aware of and
trained to perform correct and
scheduled cleaning procedures.
• A daily and weekly maintenance
schedule is highly recommended.
• Contract with a responsible service
company to regularly and thoroughly
clean larger components and spaces
requiring specialized equipment and
skills (e.g. large hood filters, hot
tanks, floor drain pipes, specialty
tools).
46 • Smaller and less complex elements
can be cleaned by hand by the user
(e.g. small hood filters, counter/bench
tops, sinks, storage areas, daily tools).
• Skim/filter fryer grease daily and test
the oil to determine when change is
necessary. Build-up of carbon
deposits on the bottom of the fryer
acts as an insulator that forces the
fryer to heat longer, thus causing the
oil to break down sooner. This
extends the life of both the fryer and
the oil.
• Avoid discharging fryer oil into a
drain or grease trap, but dispose into a
rendering container for transport to a
rendering company.
• Cleaning intervals depend upon the
type of product being prepared and
the typical deposition of materials
experienced. The larger the volume
produced and deposits incurred, the
more frequent the cleaning. This may
warrant setting up a system of high
use, high deposition work to be done
in certain equipment that is cleaned
more frequently than others to
confine maintenance efforts.

Grease Traps and Interceptors
• For grease traps and interceptors to be
effective, the units must be properly
sized, constructed and installed in a
location to provide an adequate
retention time for settling and
accumulation of the FOG.
• For information on properly locating,
constructing and sizing grease traps
and interceptors, contact the local
governmental agency and examine
EPA guidance documents and UPC
criteria.
• Ensure all grease-bearing drains
discharge to the grease
trap/interceptor.
• No toilet or shower waste should be
plumbed to the trap/interceptor
Oil and Grease Collection/Recycling and
Food Donations
• FOG consists of commodities that if
handled properly can be treated as a
valuable resource.
• Some rendering companies will offer
services free-of-charge and other will
give a rebate on the materials
collected. Contact local rendering
representative for specific
information and details.
• Use only covered rendering barrels
and make sure all drain screens are
installed.
• Use a 3-compartment sink for ware
washing. Begin with a hot pre-wash,
then a scouring detergent wash, then
a hot rinse. Each step should be
trapped to capture non-emulsified
FOG.
• Donations can reduce disposal costs.

Ensure that edible food is not washed
or flushed down the drain. Edible
food waste may be donated to a local
food bank. Inedible food waste can
be collected by a garbage feeder that
will use discards for feeding
livestock.
55 CHAPTER 8

SYSTEM EVALUATION, CAPACITY ASSURANCE, AND

CAPITAL IMPROVEMENTS

8.1 System Evaluation and Condition Assessment
In 1987 the City received a partial master plan for sewers within the area known as “Old Agoura” which is north of the SR-101 Freeway near the easterly boundary of the city.

However, this report did not address other existing sewer services in the community. The city currently does not have a comprehensive sewer master plan, so a hydraulic model analysis of the community sewer system was performed and the resulting report (2009 Sewer System Capacity Evaluation) is included as Appendix ‘L’ in this SSMP report.

The 2009 Sewer System Capacity Evaluation utilizes a hydraulic model of the system to evaluate capacity constraints and is a key element of the SSMP. The evaluation identifies capacity deficiencies in the sewer mainline system, prioritizes the deficient reaches, recommends alternatives to eliminate the deficiencies, and provides the City with a basis on which to build a future infrastructure management system. In 2009, the model identified nineteen (19) reaches between manholes with pipe flows greater than 64% full (guideline criteria). Those pipe segments equal 4,592 feet (~2% of the total system length) with a probable replacement budget of $1,970,000. However, the 2009 modeling should be updated to further engineering evaluation and select flow monitoring should be performed in order to establish a firm capital improvement plan for the identified reaches.

In addition to capacity constrained segments, the City’s 2019 CCTV investigation conducted through the County’s Condition Assessment Program revealed forty (40) locations with various structural deficiencies and seventy-eight (78) locations with various maintenance deficiencies (i.e. roots, grease, intrusions, sags, etc.). The structural deficiencies are rated and grouped with the higher priority locations first. One high priority location has a probable repair cost of $5,424. One lower priority also has a probable repair cost of $5,424. Cost estimates were originally developed for the 2015 SSMP Update, and an estimation factor of 29% was applied based upon consumer price index. Project specific design and repair methods must be considered before proceeding, and more detailed information is included in Appendix ‘N’ of this report. Additionally, the County DPW has scheduled CCTV inspection and evaluation of sewer pipe conditions (2006, 2010, 2015, and 2019) during which further repairs or replacement of any structurally deficient pipe segments should be scheduled.

The City, in conjunction with CSMD, shall prioritize the condition assessment of system areas that:
• Hold a high level of environmental consequences, if vulnerable to collapse, failure, blockage, capacity issues, or other system deficiencies; • Are located in or within the vicinity of surface waters, steep terrain, high groundwater elevations, and environmentally sensitive areas;
• Are within the vicinity of a receiving water with a bacterial-related impairment on the most 56 current Clean Water Act section 303(d) list
A schedule of future capital improvement projects will be provided in the SMD SSMP.

8.2 Adequate Capacity and Correct Design
The City is responsible for ensuring that the public sewer infrastructure is correctly designed, adequately sized and reasonably maintainable. The CSMD also provides a supporting role in reviewing all proposed sewer plans for new developments in the City. This is to ensure that sewers conform to County design standards and particularly to ensure that the District’s requirements for acceptability for maintenance are satisfied.

The City Engineer or hired qualified professional engineer provides thorough review of all sewer plans for proposed development projects in the City to ensure that capacity assessment considers: 1) data from existing system condition assessments, system inspections, system audits, spill history, and other available information; 2) capacity of flood-prone systems subject to increased infiltration and inflow, under normal local and regional storm conditions 3) capacity for an increased infiltration and inflow due to larger and/or higher-intensity storm events as a result of climate change; 4) increases of erosive forces in canyons and streams near underground and above-ground system components due to larger and/or higher-intensity storm events; 5) capacity of major system elements to accommodate dry weather peak flow conditions, and updated design storm and wet weather events; and 6) necessary redundancy in pumping and storage capacities. Any impact of proposed project on existing sewer system is mitigated prior to approval by the City Engineer to receive additional sewage flow. During construction, the projects are continuously inspected by the hired construction inspectors to ensure that the sewer facilities are constructed in accordance with the approved plans and specifications.

8.3 Prioritization of Corrective Action
The results and findings of the system evaluation and capacity assessments will be used to implement corrective actions to improve the efficiency of the sanitary sewer system and prevent future spills. This information will also inform the CIP schedule and applicable projects. The District prioritizes corrective action based on:
• Likelihood of failure which is determined from findings of condition assessment (e.g., prioritizing NASSCO PACP rating 4 and 5) and;
• Consequence of failure (e.g. proximity to water body, railroad, road type, and easement) • Areas with multiple priority segments to factor in areas to be repaired at a time Based on the condition grading and observed defects, the District prioritizes sewer segments for remediation. NASSCO PACP Structural Grade 5 defects are significant structural deficiencies.

Pipe segments with these defects are placed on a repair list with the highest priority focused on pipes with NASSCO PACP Structural Grade 5 defects prone to accelerated deterioration. Sewer repairs are also prioritized based on maintenance history, past spill records, sewer line locations, and age as they contribute to the likelihood and severity of spills. 57 8.4 Capacity Enhancement Plan
The collection sewer system capacity enhancement program and prevention of spills is a combined effort of the City and LACDPW. The City follows its policies for managing available sewer capacity (See Appendix ‘M’). While the CSMD utilizes its programs, which include the CCTV program to identify pipe segments needing repairs or with I/I or tree root intrusion problems, sewer cleaning program and the CSMD ACO program to effect repairs or replacement of damaged pipes. The CSMD programs are described in Chapters 4 and 8 of the SMD SSMP. The identified capacity deficient pipe segments and related replacement costs are addressed in Appendix ‘L’.

8.5 Capital Improvement Plan
As described in Section 8.4 of the SMD SSMP, collection systems owned by the Cities receive improvements under the City’s Capital Improvement Plan (CIP). For unincorporated areas, system repairs are funded by the County. The SMD focuses on lining and point repairs for damaged pipes to maintain operations and reduce the risk of sewer spills.

Most improvements are delivered through on-call contracts, including work on gravity mains, point repairs, and pipe lining. The Accumulative Capital Outlay Program (ACO) funds the repair and maintenance of SMD facilities. Alternative funding sources vary for each project and can come from the zone budget or other assistance identified by LACPW. The Project Management Division (PMD) manages the CIP and schedule, tracking budget, scope, and schedule.

8.6 Financing of Improvements
General
Funding considerations are often the deciding factor in scoping and implementation of a project. There are, of course, numerous methods or mix of methods, which could be used to finance the implementation of a sewer system capital improvement plan (CIP), and the ongoing operations and maintenance activities. Among these methods are:

1. Pay-as-You-Go Financing (rates, fees and charges based)

2. Redevelopment Agency Funding

3. State Assistance Programs

4. Municipal Securities

5. Improvement Districts

6. Federal Assistance Programs
In discussion that follows, the above funding options are briefly described and their 58 adaptability to specific circumstances of a sewer system CIP are noted. In evaluating specific funding programs, services of financial and legal experts in such issues are recommended.

Methods of Financing

1. Pay-as-You-Go Financing:

Development of cash reserves or capital improvement funds, from an agency’s revenue base, is often referred to as "pay-as-you-go" funding. This method avoids interest payments on other types of debt financing. Under this form of financing, the initial capital cost of a project must be accumulated in advance of construction, which can cause a delay in project implementation. If delay is not a crucial factor, this is a cost effective method due to the absence of debt financing costs. This method has sometimes been used together with various forms of short-term financing to construct needed sewer infrastructure.

2. State Assistance Programs:

Under the rules and regulations of the Federal Water Pollution Control Act (Clean Water Act or CWA) and the Federal Safe Drinking Water Act (SDWA), the State has enacted the Clean Water State Revolving Fund (CWSRF) and the Drinking Water Revolving Fund (DWSRF), respectively. These programs are funded by Federal grants, State funds and Revenue bonds. The CWSRF Loan Program provides low-interest loan funding for construction of publicly-owned wastewater treatment facilities, sewers, sewer interceptors, water recycling facilities, as well as implementation of non-point source (NPS) projects or programs. There are different types of funding assistance available under these programs.
www.waterboards.ca.gov/water_issues/programs/grants_loans/srf/ The Department of Water Resources administers the State bond law programs for Water supply/Water quality, Water conservation, Flood management and Regional water management. https://water.ca.gov/Work-With-Us/Grants-And-Loans The State Water Resources Control Board administers the State revolving fund loans, Water recycling grants & loans, Small community grants, Agricultural drainage loans, Agricultural drainage management loans, Clean beaches initiative grants, Agricultural water quality grants, Areas of special biological significance (ASBS) grants, Storm water grants, and Santa Monica bay restoration commission grants. www.waterboards.ca.gov
The State Department of Public Health administers the DWSRF, Proposition 84 funding for public water systems, and Proposition 50 for the water security, clean drinking water, coastal and beach protection act of 2002 loans. www.cdph.ca.gov Various types of infrastructure improvement/construction loans can be arranged 59 through the California Infrastructure and Economic Development Bank (IBank) www.ibank.ca.gov
Limited amounts of public works grant funds have been available to agencies from the State Office of Economic Development. Use of such grant funds must result in the creation of new, permanent jobs in the private sector. In order to ensure that the funds are ultimately assisting those in most need, projects eligible for consideration must be those in areas designated eligible for HUD Urban Development Action Grants (UDAG), EDA Sudden or Long-term Economic Deterioration, or EDA Designated Special Impact Area.

3. Municipal Securities:

Historically, general obligation bonds (GOB’s) had been a prevalent method of financing various public works improvements. They are secured by an agency’s total assets and payable from ad valorem taxes levied on all taxable properties within the agency’s boundary. However, the Jarvis-Gann Amendment (Proposition 13 of 1978) prohibits the levying of ad valorem property taxes beyond pre-existing authorizations and levels (pre-July 1, 1978). Therefore, authorization and issuance of GOB’s is not considered feasible under current law.

An alternative to GOB’s is the issuance of a specific type note or bond form, such as a revenue anticipation note (RAN) or a tax anticipation note (TAN) or a certificate of participation (COP) or various combinations of available authorities that can be used to fund public infrastructure needs. These types of municipal securities (Munis) are generally tax-exempt and commonly used to fund public works infrastructure and facilities. Many states also exempt their securities from their own taxes, which makes those securities particularly attractive investments for their own residents.

TAN’s and RAN’s are instruments backed by anticipated taxes or revenues respectively.

When these types of notes are considered for funding of needed infrastructure, a specified source of tax or revenue stream is identified and pledged for repayment of the debt. For example, with sewer facilities, all or a portion of the sewer service revenue fees/charges could be used as backing for the debt instrument selected. Then other local revenue sources could be considered for ongoing operations and maintenance (O&M) or some acceptable mix and match of funds specified to secure the debt and accomplish the O&M.

COP’s are another form of municipal funding instrument available. These generally require the facility improvement being funded to be named as security for the investment with a lease back of the facility by the municipality. In turn, the municipality pledges some revenue stream(s) that would be used to repay the investor held notes.

When Munis are being considered for funding of improvements, consultation with an experienced and qualified financing consultant and bond counsel are a must.

4. Improvement Districts:
60 In general, special assessment district procedures have been established by statute to provide for financing of construction and/or acquisition of public works improvements, such as sewer systems, and for assessing the cost of such improvements to the benefiting properties. Under all assessment proceedings, the cost of the work is assessed against properties within the benefited area. The assessments are levied in specific amounts against each individual property on the basis of the benefit each parcel receives. The property owner may pay the assessment in cash during the cash collection period of 30 days. But, if any assessments are not paid in cash during that period, bonds are usually issued to represent the unpaid assessments and the benefited properties are assessed on their annual property tax bill over a usual period of 10 to 20 years.

Commonly used assessment acts are the 1911 and 1913 Acts. The common bond acts are the 1911 and 1915 Acts. These assessment and bond acts are used in varying combinations depending on the particular circumstances for each proposed improvement district.

While an assessment district proceeding may be a reasonable and equitable means for financing sewer system improvements, further evaluation and stakeholder involvement is a usual practice to determine the viability and practicality of utilizing such financing method.

5. Federal Assistance Programs:

There are, and have been, a series of federal grant and loan programs which may be applicable to public infrastructure projects. However, the qualification criteria for such programs vary from time to time and their funding or continuation is subject to congressional appropriations. Therefore, such programs should not be considered as a likely source of funds unless a funding commitment letter has been received.

Historically, federal programs administered by the Economic Development Administration (EDA) provide financial and technical assistance to aid the economic development of areas with high unemployment or low family income levels.

Communities must make long-range plans for economic growth in order to be eligible for EDA financial assistance, in the form of grants and loans for public works and development that generates jobs and economic opportunity. Typical public works projects include construction of roads, water and sewer lines, and public facilities. To determine the status requires timely monitoring.

Under the rules and regulations of the Housing and Community Development Act of 1974, the Community Development Block Grant (CDBG) program can fund housing and community development needs. This includes part or all of improvements necessary to upgrade existing sewer facilities. Those qualifying geographic areas within the City that have the greatest overall deficiency in physical infrastructure receive the highest priority according to CDBG criteria. When the sewer system has a 61 defined deficiency, then it is appropriate to use CDBG funds to meet health and safety standards as well as to encourage up-grading of abutting housing and physical environment.

Communities receiving CDBG funds through the State may use the funds for many kinds of community development activities including, but not limited to:
• acquisition of property for public purposes;
• construction or reconstruction of streets, water and sewer facilities, neighborhood centers, recreation facilities, and other public works; • demolition;
• rehabilitation of public and private buildings;
• public services;
• planning activities;
• assistance to nonprofit entities for community development activities; and • assistance to private, for profit entities to carry out economic development activities (including assistance to micro-enterprises).

The United State Department of Agriculture Rural Development Program provides communities with population less than 50,000 a variety of direct-guaranteed-loans and /or grants. These include water and wastewater system improvement funding. www.rurdev.usa.gov/ca
56 CHAPTER 9

MONITORING, MEASUREMENT, MODIFICATION PROGRAM

9.1 Maintenance of Information
The City will document all relevant data on spills that occur in the City. These will include both the quarterly spill reports and the Annual Reports published by County DPW for the City, and any special reports to regulatory agencies etc. The data will be analyzed to evaluate the effectiveness of the City’s SSMP.

9.2 Monitoring of Implementation and Effectiveness of the SSMP The City will implement an adaptive management approach to evaluate the City’s SSMP program effectiveness shall be based on such key performance indicators as the total number of spills, spill response time, reduction in repeated incidents of spill at some location, total spills equal to or greater than 1,000 gallons or reaching the waters of the United States and reduction in number of spills that are caused by sewer capacity-related problems. The City will maintain relevant information, including audit findings, in the SSMP to establish and prioritize appropriate SSMP activities.

9.3 Program Audits
Every three years, the City performs an internal audit of the SSMP and the SSMP program implementation. The various County divisions and positions responsible for SSMP implementation as identified in the organization chart in 2.4.1 are involved in the audit. Each element of the SSMP is reviewed for effectiveness towards reducing the frequency and/or mitigating the impacts of spills and for compliance with the General Order requirements. Corrective actions to address identified deficiencies are prioritized, scheduled and incorporated into division plans.

9.4 Assessment of Preventative Operation and Maintenance Program The City will periodically update or modify key elements of its SSMP based on the results of the above mentioned monitoring and program effectiveness evaluations. The City shall also make recommendations to the County, as necessary, on elements of the SMD SSMP to be adjusted or revised within the City boundaries to better serve its residents.

9.5 Spill Location Mapping and Trends
All sanitary sewer system agencies in the Los Angeles, Santa Ana, and San Diego Regional Water Quality Board regions including the City of Agoura Hills, which is a sewer system agency within the Los Angeles Regional Water Quality Board region, were required to report all spills to their respective Regional Board beginning on January 2, 2007.

CSMD has retained spill data pertaining to the City dating back to 2004. The characteristic data for each recorded spill event in the City from January 2022 through August 2025 is shown in Section

9.5.1a.
57 9.5.1a Reported City Spills (2022-2025)
Year Spill No. Spill
Category
Date Location
Estimated
Volume
(gal)
Estimated
Recovered
Volume (gal)
Spill Cause
2022 1 1 1/21/2022 5050 Kanan Rd. 525 0 Grease/Rags
(a) Refer to Section 6.1.7 for spill category definitions.

9.5.1b Location Map of Reported Spills (2022-2025)
See the following page.

9.5.2 Graphing and Charting of Spill Frequencies
Spill data is stored in the State Water Resources Control Board’s CIWQS database and SMD internal PowerBI database. Productivity reports documenting and summarizing the work performed per City can be generated by PowerBI. Over time the graphs are used for identifying spill trends, to evaluate overall program effectiveness, and are used as an indicator of possible problems due to infiltration/inflow.
58 City of Agoura Hills
Spill Locations Map (2022-2025)
CHAPTER 10
59 SSMP PROGRAM AUDIT AND CERTIFICATION

10.1 SSMP Program Audit
The City shall conduct periodic internal audits and prepare a report at a minimum every three years.

The audit will focus on evaluating the implementation and effectiveness of the SSMP as well as the City’s and SMD’s compliance with all elements of the SSMP and the General Order. This will include:
• Identification of any deficiencies in the SSMP in addressing ongoing spills and discharges to waters of the State
• Steps taken to correct any identified deficiencies including necessary modifications to the SSMP
• Notes on interviews with key responding personnel and any contractors utilized • Notes of operational observations, especially of each spill event • Notes on related equipment inspections
• Findings of all review of records
The Enrollee shall submit a complete audit report that includes:
• Audit findings and recommended corrective actions
• A statement that sewer system operator’s input on the audit findings has been considered; and
• A proposed schedule for the Enrollee to address the identified deficiencies The most recent audit report must be kept on file. Copies of the audit report shall also be available upon request by the involved regulators and stakeholders.

10.2 SSMP Certification
The SSMP shall be presented to the City Council for approval at a public meeting and subsequently certified by the LRO to be in compliance with the requirements set forth in the WDR. The City’s LRO must also complete the certification portion in CIWQS at:
(http://ciwqs.waterboards.ca.gov/).

10.3 SSMP Modification and Re-certification
The SSMP must be updated every six years to keep it current. When significant amendments are made to any portion or portions of the SSMP, it must be resubmitted to the City Council for approval and re-certification. The re-certification shall be in accordance with the certification process described in Section 10.2 above.

CHAPTER 11
60 COMMUNICATION PROGRAM

11.1 Communication
The City shall provide all stakeholders and interested parties, the general public and other agencies, with status updates on the development, implementation and performance of the SSMP and consider comments received from them [in conformance with the WDR, Section D11]. The City shall utilize various outreach means to communicate issues surrounding the use and operation of the city sewer system, such as letters, newsletters (city and chamber of commerce), brochures, annual reports, notices in newspapers, local cable access programming, and the City’s home web page for conveying this information. In concert with the City’s efforts, the CSMD will provide educational and information materials as well as utilize the LACDPW website to communicate with the public.

If a spill enters the ocean or a waterway requiring posting of signage, the Department of Public Health will post and remove signage for waterways as required and will not remove the signs until the effects of the spill have been mitigated. A public press release will be made of the temporary closure due to a spill. Additionally, if a spill enters a drinking water source, proper notification and procedures will be implemented as stated in Chapter 3 of the SMD Spill Emergency Response Plan.

11.2 SSMP Availability
Copies of the SSMP will be maintained in the CSMD Office, all CSMD Maintenance Yards, and onsite at City Hall. The document shall also be made readily available upon request to the Regional Water Quality Control Board (Region 4) and to the operators of any collection system or treatment facility downstream of the City’s system.
61 APPENDICES
Appendix A1---------------------
In the SMD SSMP
Appendix A2--------------------
In the SMD SSMP
Appendix A3----------------------
In the SMD SSMP
Appendix B1--------------------
In the SMD SSMP
Appendix B2--------------------
Governing Board Approval
SWRCB – General Order for Sanitary Sewer Systems
Asset Summary Per Collection System
List of Staff Responsible for Implementing Specific Elements of the SSMP
In the SMD SSMP
Appendix D--------------------
In the SMD SSMP
Appendix F---------------------
In the SMD SSMP
Appendix G---------------------
In the SMD SSMP
Condition Assessment Work Schedule
Spill Emergency Response Plan
IDWP Conditions and Limitations
Appendix K--------------------- Spill Emergency Response Plan Appendix L--------------------- Sewer System Capacity Evaluation Appendix M-------------------- Policies for Managing Available Sewer Capacity Appendix N-------------------- CCTV Inspection Report
Appendix O-------------------- Location Map – Delivery Points, Maintenance Zones, Flow Monitoring Locations & Hydraulic Identifications
Appendix P--------------------- Industrial Waste Contract With City Appendix Q--------------------- 2025 SSMP Update Extension Letter Appendix R--------------------- SSMP Change Log
Sewer Maintenance Division Staff Contact Sheet
Appendix “K”
Spill Emergency Response Plan
Appendix ‘K’
1 SPILL EMERGENCY RESPONSE PLAN

INTRODUCTION
The City of Agoura Hills serves the wastewater disposal needs of approximately 19,474 people in the western Los Angeles County area per the 2023 United States Census. The community sewers receive and convey approximately 3.7 million gallons per day of wastewater to the regional LVMWD trunk sewers and wastewater treatment plant.

The primary goal of the City’s sewer maintenance program has been and remains the protection of public health, safety and the environment. As a matter of State and Federal regulations, spills are prohibited, and moreover, are inconsistent with the City’s goal of providing the highest level of sewer service to the public. The City places high priority on capacity assurance, repair and replacement, and proper operation and maintenance of its sewerage system. While the City desires to completely eliminate spills, it is also understood that manmade systems do fail. Regardless of the level of scrutiny and control provided, spills may, on occasion, occur.

The City is responsible for response to and reporting of, all spills caused by problems within the City’s sanitary sewer system. Therefore, an effective SSMP has to encompass the response measures necessary to minimize any public health and environmental impact when overflows do occur. To accomplish this, the City operates a two-pronged response to spills that directs efforts to stop the spill simultaneously with efforts to contain and recover the wastewater discharged. These actions are taken in concert with the LACDPW as the sewer maintenance provider under the CSMD membership of the City. CSMD implements the SMD Spill Emergency Response Plan to assist in quick response to emergency situations to prevent spills of wastewater from reaching the water of the United States. Annually the City will review and assess the effectiveness of the Spill Emergency Response Plan, and update the Plan as needed.

SPILL RESPONSE GOALS

1. The City’s goals and actions regarding spill response are stated in Chapter 1 of the SSMP.

NOTIFICATION, INVESTIGATION AND MOBILIZATION

1. The City’s chain of communication and reporting are stated in Chapter 2 of the SSMP.

2. The following occurs upon receiving notification of a spill:
• The notification is logged on a form (See Attachment K-1) and assigned for followup actions in concert with the LACDPW.

Appendix ‘K’
2 • Dispatch of Personnel to Investigate - For spills reported during the workday, a supervisor or other trained representative is immediately dispatched to investigate; during non-working hours, an on-duty employee or supervisor is dispatched. Both events are concurrent with the notification of an spill event reporting to the LACDPW.
• Dispatch of Staff and Equipment - When the initial inspection report indicates that a wastewater spill has occurred from the City’s sewer system, a notification call is placed to both the LVMWD and to the LACDPW for support of personnel and equipment to the spill site.
• Notification for Outside Support – When the initial investigation determines that additional ‘Outside Support’ resources and notifications will be necessary to accomplish the containment, clean-up and compliance, the City Engineer is notified and informed of the situation and the perceived needs.
• Notification of Sewer, Water, and Health Agencies - When the initial investigation indicates that a spill has occurred in another agency’s sewer or may have resulted from blockage in another agency’s sewer, the potentially responsible agency is immediately notified. If the additional on-site investigation indicates that the spill is the responsibility of the other agency, then the response efforts are turned over to that agency, with assistance from the City, if necessary and if requested. Additionally, health and regulatory agencies (i.e., Los Angeles County Health Department and Regional Water Quality Control Board) will be notified of the spill as applicable. Regardless of cause, once the spill response has occurred, the primary objective is to minimize the risk to human health and to the environment (i.e. Waters of the United States). Notification to applicable agencies is based upon spill category; more information can be found in Section 6 of the City’s SSMP.
• Notification of Management Personnel - Appropriate management personnel are notified (if they have not already been notified) and any personnel necessary for office support of the field response are mobilized.

RESPONSE
The spill response is directed in the field by supervisors and/or managers who are trained and experienced in responding to spills, with additional operations, maintenance, engineering and agency support staff available as needed for public notification, protection, resource supply, expense authorization and tracking, and coordination of available support resources.

The individual steps involved in the response to a wastewater spill event include:

1. Corrective Action and Site Control

2. Containment and Recovery

3. Cleanup

4. Sampling
Appendix ‘K’
3 5. Notification and Reporting

6. Post-Cleanup Activities

1. Corrective Action and Site Control
Upon arriving at the spill location, concurrent actions taken by the various crews are:
• Prevent Public Access - Access to the immediate area of the spill is restricted to minimize potential impacts to public health by redirecting pedestrian and automobile traffic away from the spill through the use of traffic cones, plastic tape, barricades, or local law enforcement.

The extent of the spill and its potential impacts to the public health are assessed by City’s personnel. This process involves determining if any private property owners/residents may be exposed to raw sewage, making direct contact with private property owners/residents who have been or may be directly affected by the spill, advising private property owners/residents of the potential health hazards associated with contact with raw sewage, and identifying prudent measures to be taken by private property owners/residents, such as vacating the property, to prevent contact with the spill.

Simultaneous efforts include determining the path and final destination of the sewage spill and potential exposure to the public. If wastewater from the spill is ponding in a location that can be isolated, then City personnel set up barricades to prevent public access. Traffic control is set up to prevent vehicles from entering locations where the spill has contaminated public or private streets. City personnel are instructed to direct pedestrians and automobile traffic away from the path and final destination of the spill. All involved personnel cooperate with local law enforcement and public works officials to ensure that public exposure to the spill is minimized and to ensure spill site security.
• Prevent Wastewater Entry to Storm Drain System - When possible, contain and recover the spill in the immediate vicinity of the spill before it enters a storm drain catch basin. Measures to effect such containment include damming the spill path with sandbags in the street gutter and recovering the impounded water with a vacuum truck or jet vactor, or using sandbags to divert the spill back into a nearby sewer manhole. • Stop Spill - The cause of the spill is investigated and the necessary corrective action is taken to stop the spill and/or correct the condition that caused the spill if the spill has already stopped.

Typical corrective actions to stop a sewer spill include:
▪ clearing a pipe blockage with a jet vactor or rodding machine, ▪ removing debris from a manhole,
▪ upstream flow diversion,
▪ bypass of wastewater around the blockage using vacuum trucks or pumps, Appendix ‘K’
4 and
▪ bypass and repair of a damaged force main.

Bypass pumping is typically accomplished by the use of portable pumps and hoses to convey flow around the blocked or damaged sewer, the inoperative pumping plant or the damaged force main. The SO&M team maintains a S p i l l Response R i g , which is equipped with portable pumps and hoses of various sizes, fittings, and tools and is designed to bypass flows of up to 450 gallons per minute. When possible, diversions are used to redirect a portion or all of the wastewater around the affected area in the system. Maintaining accurate and complete sewerage system maps is essential to expeditiously accomplish wastewater diversion during an emergency response. • Pumping Plants - Emergency Procedure Operating Manuals for pumping plants (Lift Stations) are available in the LACDPW as references for operations, maintenance, engineering, supervisory, and management staff. The manuals provide comprehensive information on the proper response to all types of pumping plant failures, potential spills and force main leaks and failures. Available information includes proper response to power failure, high wet well level, telemetry system failure, control system failure, procedures to bypass the plant, and emergency spill information including low manhole location, storage time in the tributary sewer system, containment location and estimated travel time to the containment location.

2. Containment and Recovery
Containment and recovery of the spill should occur as close as possible to the site of the spill, preferably in the street curb and gutter, to minimize the length of the storm drain system affected by the wastewater. When a storm drain system is nearby, the spill may enter the storm drain system prior to arrival of the first responding personnel. In these cases, engineering, supervisory and/or management staff identify the most practical containment location in the storm drain system downstream of the spill. In the selection of the best containment location, staff must consider many factors, including:
• the time the spill started,
• the spill route through the storm drain system,
• the time needed to install a containment dam,
• the travel time for the spill to reach the containment location, • safe access to the containment location for personnel and equipment, and • the availability of a nearby sewer with sufficient capacity into which recovered wastewater can be returned.

Access and safety considerations generally require establishment of containment in open storm drain channels. Containment in buried storm drains pipes upstream of any open channels is preferable when possible. However, the physical difficulty of deploying personnel and materials through a manhole into a buried storm drain pipe to construct a containment dam, the dimensions of the storm drain itself, and/or the safety procedures and authorization needed to enter confined space generally preclude rapid and practical establishment of containment within a buried storm drain pipe. City staff can usually and safely enter the storm drain system to establish containment during dry weather conditions only. A Appendix ‘K’
5 containment location close to the spill location is only possible when a containment dam can be deployed very quickly after the start of a spill.

Once a suitable containment location is identified, the crew responsible for containment:
• deploys a sandbag containment dam or otherwise prevents the movement of the spill and contaminated street runoff further downstream in the storm drain system, and
• deploys the vacuum trucks or portable pumps and piping necessary to return the contained wastewater, dry weather runoff, and clean up water back to the sewer system.

3. Cleanup
After the spill has been stopped, the following steps are taken in collaboration with responsible agencies:
• Recover Locally Impounded Wastewater - All locally impounded wastewater is recovered with a vacuum truck or jet vactor and returned to the sewer system • Collect Wastewater Debris - All visible debris of wastewater origin from the spill location(s), street(s), curb and gutters, and the spill runoff path is physically removed.
• Flush Affected Area – S p i l l location(s), street(s), curb and gutters, and the runoff path are flushed with lightly chlorinated potable water, typically delivered by a vacuum truck or water truck. The flush water is also recovered and returned to the sewer system.
• Flush Storm Drain and Conduct Dye Study - Additional potable water is used to flush the spill runoff path within the storm drain system. When appropriate, this flush water is marked with a nontoxic, visible dye. Arrival of the dye at the containment location establishes the actual travel time to the containment location. Recovery of the dye confirms completion of spilled wastewater and flush water recovery. • Complete Cleanup - All sandbags and other containment are removed to complete the cleanup in the storm drain system. If spilled wastewater reaches natural watercourses or other areas accessible to the public, input is solicited from the responsible jurisdiction regarding additional measures which may be necessary or appropriate for a complete cleanup. Additional cleanup measures are completed as directed.

Private properties impacted by spills or backups from problems within the City’s sewer system should be cleaned up by a professional restoration company dispatched by the City.

The City may offer residents meals, lodging, and reasonable expenses when they are temporarily displaced by private property restoration operations. Claims for property Appendix ‘K’
6 damage are handled by the City’s Claims and Insurance Coordinator.

4. Receiving Water Sampling
Samples of spills should be taken for bacterial testing by the first responder, whenever possible. If it is probable that a spill may reach receiving waters, samples should also be taken of the receiving waters to evaluate the potential impact on the receiving water quality.

Samples should be drawn from the location(s) most likely to be impacted by the spil and also from a receiving waters location or locations that can be used to establish background water quality. Advance coordination with a certified laboratory for pre- arrangement of sampling supplies, notification protocol for urgent services, and training as may be required, will facilitate emergency sample delivery so that bacterial testing can begin immediately when needed. Delivered samples are analyzed for total coliform, fecal coliform, and enterococcus and other constituents that may be appropriate based on the nature of the receiving water and the spilled wastewater. Because it takes approximately
24 hours for the bacterial analyses, a second round of sampling is conducted within 24 hours of the first unless full containment and recovery of the spill can be confirmed. If sample results indicate elevated bacterial levels in receiving waters, sampling is continued until results indicate a return to background levels.

5. Notification and Reporting
Sewering entities are required to report to various regulatory agencies, including the appropriate Regional Water Quality Control Board, the County Department of Health Services, and the State Office of Emergency Services, any wastewater spills greater than 1,000 gallons and, in some cases, spills less than 1,000 gallons. The reporting requirements vary according to location of the spill and the amount of wastewater spilled. The City’s guideline for Notification and Reporting Procedures for Spills, (included as Attachment K-2), contains an outlined notification and reporting procedures for all categories of overflows. The City’s SSMP contains a flow chart which is used to determine the notification and reporting procedures that apply to a given spill incident. The SSMP also contains all of the appropriate contacts for reporting. A City’s manager, typically the Sewerage System Manager, makes the notifications. When required, telephone notification should be made as soon as possible without substantially impeding response activities and always within 24 hours of the incident occurrence. The following information shall be provided, if available, when reporting a spill by telephone:
• name of person reporting,
• name of agency,
• location of spill,
• whether the spill has entered or will enter receiving waters (rivers, lakes, storm drains, or ocean) of the State or the United States,
• date and time spill began and ended,
• estimated volume of spill,
• cause of spill,
• corrective actions taken,
Appendix ‘K’
7 • estimated time of repair, and
• agencies involved in repair and clean-up.

All spills, regardless of quantity, which reach receiving waters, impact groundwater, or endanger public health or the environment, require immediate telephone notification of the County Department of Health Services, which is responsible for beach postings and closures and other forms of public notification deemed necessary to protect the public health.

Written notification of the spill, when required, must be submitted within the required time period to the Regional Water Quality Control Board (RWQCB), typically within 30- days of a spill and within 3 days if the incident has or may endangered public health or the environment. Written reports should be submitted to the local RWQCB for spills occurring within their jurisdiction. To satisfy this requirement, the City may choose to submit a brief written confirmation of the reported spill to the appropriate RWQCB within the time frame required. A follow-up, detailed written report, pursuant to the guideline as contained in Attachment K-2, will meet the statutory provisions of the State Water Code. This detailed report usually requires three to four weeks to complete. Copies of the detailed report are sent to those agencies which were initially noticed, unless otherwise notified.

6. Post-Cleanup Activities
Once cleanup of a spill is complete, the incident must be reviewed and any appropriate measures to prevent recurrence must be implemented. Follow-up CCTV inspection is performed when a spill was caused by a blockage to verify complete removal of the material causing the blockage. If the spill was avoidable by preventative maintenance, then maintenance activities are added or adjusted as necessary. An example is to increase the frequency of line cleaning where heavy grease build-up has caused a spill to occur, while source control efforts are reviewed. If the spill was caused by factors generally outside the City’s control, such as vandalism, steps are still taken to minimize recurrence such as strengthening security by locking down manhole covers, increasing area surveillance, and requesting neighborhood assistance in reporting vandalism and unauthorized dumping.

Regardless of the size or type of spill, all spills are investigated thoroughly. Following the investigation, the information as noted on Attachment K-2 is documented and included as part of the City’s internal spill records.

Policies and procedures are upgraded as appropriate to prevent recurrence of accidental spills due to procedural errors by City’s staff and contractors. As part of their training, all involved employees must thoroughly familiarize themselves with these emergency procedures. City’s personnel administering contract sewer repair, rehabilitation and replacement projects must rigidly enforce contract provisions. Especially important is enforcing contractors' Appendix ‘K’
8 approved Emergency Spill Response Plan requirements (see Attachment K-3 for guidelines) intended to prevent and limit the impact of accidental spills.

An approved Contractor Spill Emergency Response Plan, which is activated if a spill from a contract activity enters a storm drain, should be incorporated into the contract documents of all sewer repair, rehabilitation, or replacement contracts involving sewage bypass operations.

When successful execution of a Contractor Spill Emergency Response Plan requires predeployment of containment or pumping equipment, City’s personnel administering the contract must ensure the necessary pre-deployment measures are taken. Guidelines for the preparation of a Contractor Spill Emergency Response Plan are included as Attachment K-3.

EMERGENCY RESPONSE PERSONNEL AND EQUIPMENT
Personnel
The City maintains a listing of emergency services contractors having resources necessary to respond to almost any emergency, including power failure, mechanical and electrical equipment breakdown, sewer blockage, pipe failure, and vandalism. The urgency and seriousness of any wastewater spill results in the full commitment and availability of all staff in the city to respond. Additional city personnel are utilized for specialized assistance as needed. Contractors with emergency response capabilities are also used to assist in emergencies as needed.

The City of Agoura Hills is a CSMD contract city and contracts out maintenance and operation responsibilities. A list of contractors that can be available in the event of an emergency are:
• LA County CSMD for sewer (1-800-675-HELP(4357))
• LACPW for storm drain (626) 458-4357
• LVMWD owns and operates water (818) 251-2100
• SCE for power failures (800) 611-1911
An emergency contact list is maintained which includes the home phone number of all employees in the city. All supervisors and managers in the city are assigned cell phones and/or pagers and are accessible 24-hours a day. A table of organization for spill responses and role of each supporting unit/group are included in Chapter 2 of the SSMP.

Emergency Equipment
All emergency response equipment is maintained and provided by the County DPW pursuant to the CSMD contract provisions.

A current listing of emergency equipment available from the Sewerage System maintenance yards is included in Section 4.5 of the SMD SSMP.

Appendix ‘K’
9 TRAINING
In house or external training of City and contract personnel in the goals and procedures of this plan is accomplished in annual emergency response classroom training. The training will include the requirements of the General Order, Spill Emergency Response Plan procedures and practice drills, skilled estimation of spill volume for field operators, and electronic CIWQS reporting procedures for staff submitting data. A checklist used by staff to check off and record information regarding the various procedures completed during a spill response is utilized during the training process. The checklist is included as Attachment K-1. Secondly, on-the-job training is administered to subordinate staff, by experienced supervisors and lead workers, during and following actual spill events to further reinforce the annual training and to analyze event specific issues.

The City intends to further develop the training program and update training materials as necessary in the future.

Attachm ent “K-1”
10 Attachment “K-1”
Attachm ent “K-1”
11 Attachm ent “K-1”
12 Attachment “K-1”
Attachm ent “K-1”
13 Attachment “K-1”
14 Attachment “K-2”
NOTIFICATION and REPORTING PROCEDURES for SPILLS
Category 1 – Spill of any volume of sewage from or caused by a sanitary sewer system that results in a discharge to surface water or to a drainage conveyance system that discharges to surface water:
• Initial notifications ASAP per agency procedure described in this chapter (verbal, phone, fax or E-mail)
Draft Spill Report for Category 1 Spills
Within three business days of the Enrollee’s knowledge of a Category 1 spill, the Enrollee shall submit a Draft Spill Report to the online CIWQS Sanitary Sewer System Database. The Draft Spill Report must, at minimum, include the following items:

1. Contact information: Name and telephone number of Enrollee contact person to respond to spill-specific questions;

2. Spill location name;

3. Date and time Enrollee was notified of, or self-discovered, the spill;

4. Operator arrival time;

5. Estimated spill start date and time;

6. Date and time the Enrollee notified the California Office of Emergency Services, and the assigned control number;

7. Description, photographs, and GPS coordinates of the system location where the spill originated;
• If a single spill event results in multiple appearance points, provide GPS coordinates for the appearance point closest to the failure point and describe each additional appearance point in the spill appearance point explanation field

8. Estimated total spill volume exiting the system;

9. Description and photographs of the extent of the spill and spill boundaries;

10. Did the spill reach a drainage conveyance system? If Yes:
• Description of the drainage conveyance system transporting the spill; • Photographs of the drainage conveyance system entry location(s); • Estimated spill volume fully recovered from the drainage conveyance system; • Estimated spill volume remaining within the drainage conveyance system

11. Description and photographs of all discharge point(s) into the surface water;

12. Estimated spill volume that discharged to surface waters; and

13. Estimated total spill volume recovered
Certified Spill Report for Category 1 Spills
Within 15 calendar days of the spill end date, the Enrollee shall submit a Certified Spill Report for Category 1 spills, to the online CIWQS Sanitary Sewer System Database. Upon completion of the Certified Spill Report, the online CIWQS Sanitary Sewer System Database will issue a final spill event 15 identification number. The Certified Spill Report must, at minimum, include the following mandatory information in addition to all information in the Draft Spill Report per the previous section (Draft Spill Report for Category 1 Spills) above:

1. Description of the spill event destination(s), including GPS coordinates if available, that represent the full spread and reach of the spill;

2. Spill end date and time;

3. Description of how the spill volume estimations were calculated, including at a minimum:
• The methodology, assumptions and type of data relied upon, such as supervisory control data acquisition (SCADA) records, flow monitoring or other telemetry information used to estimate the volume and spill discharged, and the volume of the spill recovered, and
• The methodology(ies), assumptions and type of data relied upon for estimations of the spill start time and spill end time;

4. Spill cause(s) (for example, root intrusion, grease deposition, etc);

5. System failure location (for example, main, lateral, pump station, etc):

6. Description of the pipe material, and estimated age of the pipe material, the failure • Location;
• Description of the impact of the spill;
• Whether or not the spill was associated with a storm event; • Description of spill response activities including description of immediate spill containment and cleanup efforts
Spill Technical Report for Individual Category 1 Spill in which 50,000 Gallons or Greater Discharged into a Surface Water
For any spill in which 50,000 gallons or greater discharged into a surface water, within 45 calendar days of the spill end date, the Enrollee shall submit a Spill Technical Report to the online CIWQS Sanitary Sewer System Database. The Spill Technical Report, at minimum, must include the following information:

1. Spill causes and circumstances, including at minimum:
• Complete and detailed explanation of how and when the spill was discovered; • Photographs illustrating the spill origin, the extent and reach of the spill, drainage conveyance system entrance and exit, receiving water, and post-cleanup site conditions; • Diagram showing the spill failure point, appearance point(s), the spill flow path, and ultimate destinations;
• Detailed description of the methodology employed, and available data used to calculate the discharge volume and, if applicable, the recovered spill volume • Detailed description of the spill cause (s);
• Description of the pipe material, and estimated age of the pipe material, at the failure location
• Description of the impact of the spill;
• Copy of original field crew records used to document the spill; and • Historical maintenance records for the failure location 16 2. Enrollee’s response to the spill:
• Chronological narrative description of all actions taken by the Enrollee to terminate the spill;
• Explanation of how the Sewer System Management Plan Spill Emergency Response Plan was implemented to respond to and mitigate the spill; and • Final corrective action(s) completed and a schedule for planned corrective actions, including:
o Local regulatory enforcement action taken against an illicit discharge in response to this spill, as applicable,
o Identifiable system modifications, and operation and maintenance program modifications needed to prevent repeated spill occurrences, and o Necessary modifications to the Emergency Spill Response Plan to incorporate lessons learned in responding to and mitigating the spill.

3. Water Quality Monitoring, including at minimum:
• Description of all water quality sampling activities conducted; • List of pollutant and parameters monitored, sampled, and analyzed; as required in section 2.3 (Receiving Water Monitoring) of the General Order; • Laboratory results, including laboratory reports;
• Detailed location map illustrating all water quality sampling points; and • Other regulatory agencies receiving sample results (if applicable)

4. Evaluation of spill impact(s), including a description of short-term and long-term impact(s) to beneficial uses of the surface water.

Amended Certified Spill Reports for Individual Category 1 Spills The Enrollee shall update or add additional information to a Certified Spill Report within 90 calendar days of the spill end date by amending the report or by adding an attachment to the Spill Report in the online CIWQS Sanitary Sewer System Database. The Enrollee shall certify the amended report.

After 90 calendar days, the Enrollee shall contact the State Water Board at [email protected] to request to amend a Spill Report. The Legally Responsible Official shall submit justification for why the additional information was not reported within the Amended Spill Report due date.

Category 2 - Spill of 1,000 gallons or greater, from or caused by a sanitary sewer system that does not discharge to surface water:
• Initial notifications per agency procedures in this chapter (verbal, phone, fax or E-mail) Draft Spill Report for Category 2 Spills
Within three business days of the Enrollee’s knowledge of a Category 2 spill, the Enrollee shall submit a Draft Spill Report to the online CIWQS Sanitary System Database. The Draft Spill Report must, at minimum, include the following items:
17 1. Contact information: Name and telephone number of Enrollee contact person to respond to spill specific questions;

2. Spill location name;

3. Date and time Enrollee was notified of, or self-discovered, the spill;

4. Operator arrival time;

5. Estimated spill start date and time;

6. Date and time the Enrollee notified the California Office of Emergency Services, and the assigned control number;

8. Estimated total spill volume exiting the system;

9. Description and photographs of the extent of the spill and spill boundaries;

11. Estimated total spill volume recovered
Certified Spill Report for Category 2 Spills
Within 15 calendar days of the spill end date, the Enrollee shall submit a Certified Spill Report for the Category 2 spill, to the online CIWQS Sanitary Sewer System Database (https://ciwqs.waterboards.ca.gov). Upon completion of the Certified Spill Report, the online CIWQS Sanitary Sewer System Database will issue a final spill event identification number.

The Certified Spill Report must, at minimum, include the following mandatory information in addition to all information in the Draft Spill Report per the previous section (Draft Spill Report for Category 2 Spills) above:

1. Description of the spill event destination(s), including GPS coordinates if available, that represent the full spread and reach of the spill;

2. Spill end date and time;

3. Description of how the spill volume estimations were calculated, including at a minimum:
• The methodology, assumptions and type of data relied upon, such as supervisory control and data acquisition (SCADA) records, flow monitoring or other telemetry information used to estimate the volume of the spill discharged, and the volume of the spill recovered (if any volume of the spill was recovered), and 18 • The methodology(ies), assumptions and type of data relied upon for estimations of the spill start time and the spill end time

4. Spill cause(s) (for example, root intrusion, grease deposition, etc.);

5. System failure location (for example, main, pump station, etc.);

6. Description of the pipe/infrastructure material, and estimated age of the pipe material, at the failure location;

7. Description of the impact of the spill;

8. Whether or not the spill was associated with a storm event;

9. Description of spill response activities including description of immediate spill containment and cleanup efforts;

10. Description of spill corrective action, including steps planned or taken to reduce, eliminate, and prevent reoccurrence of the spill, and a schedule of major milestones for those steps;

11. Spill response completion date;

12. Detailed narrative of investigation and investigation findings of cause of spill;

13. Reasons for an ongoing investigation (as applicable) and the expected date of completion; and

14. Whether or not the spill was located within 1,000 feet of a municipal surface water intake Amended Certified Spill Reports for Individual Category 2 Spills The Enrollee shall update or add additional information to a Certified Spill Report within 90 calendar days of the spill end date by amending the report or by adding an attachment to the Spill Report in the online CIWQS Sanitary Sewer System Database.

The Enrollee shall certify the amended report. After 90 calendar days, the Enrollee shall contact the State Water Board at [email protected] to request to amend a Spill Report. The Legally Responsible Official shall submit justification for why the additional information was not reported wihtin the Amended Spill Report due date.
•
Category 3 – Spill of equal to or greater than 50 gallons and less than 1,000 gallons that does not discharge to surface water
Monthly Certified Spill Reporting for Category 3 Spills The Enrollee shall report and certify all Category 3 spills to the online CIWQS Sanitary Sewer System Database within 30 calendar days after the end of the month in which the spills occurred. After the Legally Responsible Official certifies the spills, the online CIWQS Sanitary System Database will issue a spill event identification number for each spill. The monthly reporting of all Category 3 spills must include the following items for each spill:

1.Contact information: Name and telephone number of Enrollee contact person to respond to spill specific questions;

2.Spill location name:

3.Date and time the Enrollee was notified of, or self-discovered, the spill; 19 4.Operator arrival time;

5.Estimated spill start date and time;

6.Description, photographs, and GPS coordinates where the spill originated:
• If a single spill event results in multiple appearance points, provide GPS coordinates for the appearance point closest to the failure point and describe each additional appearance point in the spill appearance point explanation field;

7.Estimated total spill volume exiting the system;

8.Description and photographs of the extent of the spill and spill boundaries;

9.Did the spill reach a drainage conveyance system? If Yes:
• Description of the drainage conveyance system transporting the spill; • Photographs of the drainage conveyance system entry location(s); • Estimated spill volume fully recovered from the drainage conveyance system; and • Estimated spill volume discharged to a groundwater infiltration basis or facility, if applicable

10. Estimated total spill volume recovered

11. Description of the spill event destination(s), including GPS coordinates, if available, that represent the full spread and reaches of the spill;

12. Spill end date and time;

13. Description of how the spill volume estimations were calculated, including, at minimum:
• The methodology and type of data relied upon, including supervisory control and data acquisition (SCADA) records, flow monitoring or other telemetry information used to estimate the volume of the spill discharged, and the volume of the spill recovered (if any volume of the spill was recovered), and • The methodology and type of data relied upon to estimate the spill start time, ongoing spill rate at time of arrival (if applicable) and spill end time;

14. Spill cause(s) (for example, root intrusion, grease deposition, etc.);

15. System failure location (for example, main, pump station, etc.);

16. Description of the pipe/infrastructure material, and estimated age of the pipe/infrastructure material at the failure location;

17. Description of the impact of the spill;

18. Whether or not the spill was associated with a storm event;

19. Description of spill response activities including description of immediate spill containment and cleanup efforts;

20. Description of spill corrective actions, including steps planned or taken to reduce, eliminate, and prevent reoccurrence of the spill, and a schedule of the major milestones for those steps; including, at minimum:
• Local regulatory enforcement action taken against an illicit discharge in response to this spill, as applicable, and
• Identifiable system modifications, and operation and maintenance program modifications needed to prevent repeated spill occurrences at the same spill event location, including:
o Adjusted schedule/method of preventative maintenance, o Planned rehabilitation or replacement of sanitary sewer asset, o Inspected, repaired asset(s), or replaced defective asset(s), o Capital improvements,
20 o Documentation verifying immediately implemented system modifications and operating/maintenance modifications,
o Description of spill response activities,
o Spill response completion date, and
o Ongoing investigation efforts, and expected completion date of investigation to determine the full cause of spill;

21. Detailed narrative of investigation and investigation findings of cause of spill Amended Certified Spill Reports for Category 3 Spills
Within 90 calendar days of the certified Spill Report due date, the Enrollee may update or add additional information to a certified Spill Report by amending the report or by adding an attachment to the Spill Report in the online CIWQS Sanitary Sewer System Database. The Enrollee shall certify the amended report.

After 90 calendar days, the Legally Responsible Official shall contact the State Water Board a to request to amend a certified Spill Report. The Legally Responsible Official shall submit justification for why the additional information was not reported within the 90-day timeframe for amending the certified Spill Report, as provided above.

Category 4 – Less than 50 gallons, from or caused by a sanitary sewer system that does not discharge to surface water
Monthly Certified Spill Reporting for Cateogry 4 Spills The Enrollee shall report and certify the estimated total spill volume exiting the sanitary sewer system, and the total number of all Category 4 spills to the online CIWQS Sanitary Sewer System Database, within 30 calendar days after the end of the month in which the spills occurred.

Annual Certified Spill Reporting of Category 4 and/or Lateral Spills For all Category 4 spills and spills from its owned and/or operated laterals that are caused by a failure or blockage in the lateral and that do not discharge to a surface water, the Enrollee shall:
• The Enrollee shall provide records upon request by State Water Board or Regional Water Board staff.
• Annually upload and certify a report, in an appropriate digital format, of all recordkeeping of spills to the online CIWQS Sanitary Sewer System Database, by February 1st after the end of the calendar year in which the spills occurred.

A spill from an Enrollee-owned and/or operated lateral that discharges to a surface water is a Category 1 spill; the Enrollee shall report all Category 1 spills per section 3.1 of Attachment E1 (Notification, Monitoring, Reporting and Recordkeeping Requirements) of the General Order.

Monthly Certification of “No Spills” or “Category 4 Spills” and/or “Non-Category 1 Lateral Spills”:
21 If either 1) no spills occur during a calendar month or 2) only Category 4, occur during a calendar month, the Enrollee shall certify, within 30 calendar days after the end of each calendar month, either a “NoSpill” certification statement, or a “Category 4 Spills” and/or “Non-Category 1 Lateral Spills” certification statement, in the online CIWQS Sanitary Sewer System Database, certifying that there were either no spills, or Category 4 and/or Non-Category 1 Lateral Spills that will be reported annually for the designated month.

If a spill starts in one calendar month and ends in a subsequent calendar month, and the Enrollee has no further spills of any category, in the subsequent calendar month, the Enrollee shall certify “no-spills” for the subsequent calendar month. If the Enrollee has no spills from its systems during a calendar month, but the Enrollee voluntarily reported a spill from a private lateral or a private system, the Enrollee shall certify “no-spills” for that calendar month.

Private Lateral Sewage Discharge (Reporting Optional):

If reporting, report within 30 days past the end of the month in which the spill occurred. Enter the spill into CIWQS as a “Private Lateral Sewage Discharge” and identify responsible party, if known (not LACPW). Must be certified by LRO using CIWQS.

CONTRACTOR’S SPILL EMERGENCY RESPONSE PLAN
The following serves as the guidelines for a contractor’s development of an Emergency Spill Response Plan.

Outline for a Contractor’s Emergency Spill Response Plan:
• Identification of Project, Sewer owner, Contractor and Location of affected sewer(s) • Description of Installation criteria, procedures, layout (with diagrams) and operations. • Description of Spill prevention and protection measures/actions. • Spill control (discharge) actions/measures, to minimize impacts. • Remediation (Clean-up) measures.
• Emergency Materials and Equipment Onsite
• Emergency Equipment specifications that meet the potential spill risk • Emergency Phone Numbers
• For spills where receiving waters are, or will be, affected:
▪ Identification of affected drainage course/piping owner, proximity and emergency contacts ▪ Map of drainage path, access and containment points, with relevant photographs ▪ Identification of closest sewer to the containment point(s) ▪ Travel time to the containment point
▪ Emergency support resources and contacts
▪ Equipment and Materials necessary for containment and for Clean-up ▪ Require notification contacts
Appendix “L”
Sewer System Capacity
Evaluation
Appendix ‘L’
City of Agoura Hills

SEWER SYSTEM CAPACITY EVALUATION
2009
Introduction and Summary
The City owns and operates its local wastewater collection system consisting of approximately 53.6 miles of gravity flow sewer pipelines (8-inch to 15-inch, mostly vitrified clay pipe) and 1,294 manholes. The existing sewer system discharges to trunk sewers that are owned and operated by the Las Virgenes Municipal Water District.

The purpose of this evaluation is to identify capacity deficiencies in the existing sewer mainline system, prioritize the deficient reaches, recommend alternatives to eliminate the deficiencies, and provide the City with a basis on which to build a future infrastructure management system.

The 53.6 miles of local sewer pipes were modeled using HYDRA® 6.4 by PIZER. Of the total miles, approximately 4,592 feet (0.87 miles or 2%) of the existing system were identified as being capacity deficient (Greater than 64% full). The deficient reaches of sewer pipeline are located within SMZ # 17, 20, 23, 26, 29, 30, 31, 35, and 41. Please refer to Appendix ‘L2’ for the deficient reach locations. The cost to repair the deficient reaches is described in Appendix ‘L-1’.

During four weeks in March and April of 2009, flow monitoring was performed as part of this evaluation effort at nine locations as indicated on the Appendix ‘F’ map. This was done to confirm the LACDPW design coefficients of flow generation used in the computer model. In general, the results of the flow monitoring indicate that the model flow rates are slightly conservative for most of the nine areas monitored. However, some of the flow monitoring data warrants further discussion with the monitoring subconsultant in order to clarify or rectify some of the calibration analysis conducted with the monitoring data. Of concern are the low flow condition results and a high flow result for one of the higher density residential areas of the city. Depending upon further evaluation findings, obtaining additional flow monitoring for selected developed areas may be recommended, especially during periods of rain to verify or deny any potential inflow and infiltration impact to the sewer system.

In the event of any land use changes to the General Plan, upon which this study has been based, the model should be updated to reflect the consequences of such changes. The model should also be updated to reflect the construction of new relief facilities and/or the construction of new sewer lines.

Study Approach
The following tasks were performed in the preparation of this Sewer System Capacity Evaluation Report.

Appendix ‘L’

1. The city provided its current GIS base map with horizontal sewer system features, Willdan obtained city as-built drawing plans from which additional vertical data was added to the GIS file of attributes for the sewer.

2. The City provided the November 2006 General Plan land use map (Appendix ‘L-5’) for use in creating a land use overlay of the parcels and sewer maintenance zones in the city system.

3. Formulation of a computer model of the City wastewater collection system.

4. Analysis of the existing wastewater collection system capacity and determination of any capacity deficiencies (refer to the deficiency criteria section of this report and see Appendix ‘L-2’.

5. Development of recommendations for system improvements to correct deficiencies.

6. Preparation of cost estimates for the recommended improvements (Appendix ‘L-1’).

7. Preparation of evaluation findings and recommendations to correct identified deficiencies in this Sewer System Capacity Evaluation Report.

System Criteria and Alternatives
In designing or evaluating a wastewater collection system, the engineer must establish certain criteria upon which to base the design. These include such things as available pipe sizes, materials, slope, bury or cover, connections, etc. Such criteria are established to ensure that the wastewater collection system can operate effectively under all flow conditions. Each pipe segment must be capable of carrying the peak flows without surcharging the system.

Surcharging the system occurs when the pipe is flowing under pressure. However, many of the initial design assumptions are unnecessary in the analysis of a collection system when the pipe already exists and its features are fixed.

Therefore, in the analysis of an existing sewer system, the Hydra program compares the capacity of each pipe in the system with the peak wastewater flow projected for that particular link or reach of pipe. If the pipe segment is at or below design capacity, the analysis program continues downstream, segment by segment, evaluating successive pipe segments in the system.

However, if the existing pipe size is surcharged, the Hydra program reports the surcharge condition and recommends a standard pipe size that will carry the design flow without being surcharged. Minimum criteria utilized is all pipes must be 8 inches or larger in diameter and the in pipe velocity of flow should be 2 feet per second (ft/s) or greater. This velocity will prevent deposition of solids in the sewer and help to re-suspend any materials that may have already settled in the pipe. Table 1 shows the minimum corresponding slopes to maintain 2 ft/s for various pipe sizes.

Table 1
Minimum Pipe Slopes ft/ft
Sewer Size Slope
8” 0.0028
10” 0.0021
12” 0.0016
15” 0.0012
18” 0.0010
Appendix ‘L’
Both design and analysis of gravity sewer pipes is typically based upon the depth of flow to the pipe diameter ratio (d/D). Common design criteria for proposed new sewer design is 0.50 (50% full) for 8 to 15-inch diameter pipes and 0.75 (75% full) for 18-inch and larger pipes.

The area above the water surface (residual capacity) helps to keep the sewage aerated, reducing the possibility of septic conditions and odors. Existing wastewater systems are usually allowed to flow with less residual capacity because development and redevelopment has occurred or may be foreseeable in the near future.

This report establishes the hydraulic design criteria for existing sewer pipes by classifying “over capacity” pipes as any with a d/D greater than 0.64. This d/D ratio was arrived at by taking 75 percent of the depth to diameter ratio of a pipe having maximum stable flow capacity, which is at a d/D of 0.85 (75% of 85% is 64%). The area above a d/D of 0.85 is considered hydraulically unstable. This reduction results in approximately 35 percent of the pipe’s full flow capacity being reserved for variations in discharges, seasonal variations and minor or temporary obstructions. Again, this residual capacity helps to keep the sewage aerated, reducing the possibility of septic conditions and odors.

The residual capacity allows for the possibility that actual wastewater flows may be slightly higher than anticipated, especially during the hours when instantaneous or intermittent peaks may occur. Such peaks are generally observed between the hours of 6:00 a.m. and 8:00 a.m.

Monday thru Friday and between the hours of 9:00 a.m. and 11:00 a.m. Saturday and Sunday.

Peak flows may also be observed during rainfall events due to inflow and infiltration conditions.

Appendix ‘L-2’ shows the pipes that are capacity deficient per the 0.64 criteria and also shows the pipes that are deficient per the 0.50 criteria. Only the pipes that exceed the 0.64 criteria are recommended for correction projects.

The design capacity of a gravity pipeline is the calculated capacity of the pipeline based on the Manning formula:

Q=1.486 R2/3 S
1/2 /n where, Q = flow in cubic feet per second
R = hydraulic radius in feet = A/ P
A = cross-sectional area of the pipe in square feet
P = wetted perimeter in feet
S = slope of the pipe in feet of rise per foot of length n = Manning’s friction factor
Sewer system capacity is established using a Manning’s fiction factor of 0.013 for vitrified clay pipe.

Alternatives
The following alternatives were considered in developing the recommended schedule of deficiency correction projects.

Appendix ‘L’

1. Construction of a parallel sewer facility to carry the excess sewage flow is an obvious solution to most of the deficiencies; however, this solution is not necessarily the most economical or practical approach. In some instances rerouting of tributary areas or the construction of a single relief sewer line can be planned in such a way that it will relieve several main sewer lines thereby avoiding the construction of parallel facilities and the duplicate cost.

2. In other instances the replacement of the existing sewer with a larger size may be the preferred alternative. The replacement or upsizing of the line may include open trench installation or pipe bursting (if surrounding condition are conducive), and the use of temporary bypass pumping. The decision as to which correction alternative to construct is typically made just prior to the design phase after careful consideration of all design constraints such as existing utilities and the costs associated with potential utility relocation to provide additional space for the construction of a replacement sewer line.

The engineer’s opinion of cost figures (See Appendix ‘L-1’) was prepared based on the cost to remove and replace the existing sewer with a larger size, as this is the most conservative cost approach.

It is suggested the where the depth of flow exceeds the design criteria of 0.64 d/D, but does not exceed the maximum stable flow capacity of 0.85 d/D, that consideration be given to allowing these sewers to flow in a slightly overloaded condition in lieu of building a more costly relief facility at this time.. This overloading occurs only during peak flow conditions that are short in duration. The City should frequently monitor these sewers in order to undertake a future corrective action if the overloading problem becomes worse.

Analysis of Existing Sewer System
The City’s sewer system was modeled using Pizer Hydra Ver. 6.4. The Hydra program is designed to provide analysis of both the existing sewer system and the design of any new sewer lines.

After defining (lying out) the existing sewer system, the network was divided into 56 SMZ’s or sewer drainage areas, based upon city sewer records, for input into the computer model.

The input data consisted of a numerical designation for each manhole and length of sewer pipe between manholes, the slope of the line, and flow line and rim elevation of each manhole.

Computation of Wastewater Inflows
Once the pipe schematic of the sewer system network was established, data was compiled on each SMZ, General Plan land uses, and related factors that affect the volume of wastewater generated. Next, it was necessary to compute the area of each type of land use; e.g., lowdensity, medium-density, and high-density residential, commercial, industrial, schools, etc., within each SMZ (drainage) boundary. The LACDPW unit flow coefficients (see Table 2) Appendix ‘L’
were then applied to the computed areas of land use within each SMZ. The results are a calculated peak flow rates for each particular land use category. The wastewater inflows calculated for the various land use categories within the SMZ were then accumulated to provide the calculated peak flow for the entire SMZ. The accumulation of estimated wastewater flow is accomplished totally within the computer program.

Table 2
Unit Flow Coefficients for Peak Flow Rates
Zone Cu. Ft. per
sec. per acre
Gallons per
day per acre
R-1 0.004 2585
R2 0.008 5171
R3 0.012 7756
R-P,
Commercial 0.015 9695
Manufacturing 0.021 13573
Institutional 0.015 9695
Flow Monitoring
In order to verify and/or calibrate the sewer flow modeling work, nine jointly selected flowmonitoring sites were chosen to represent existing developed area flows. This monitoring work was performed over a four week period from March 24 through April 23, 2009.

Flow monitoring data was provided by V&A Engineering as subconsultant to Ventura Regional Sanitation District, which undertook the CCTV inspection and flow monitoring services as a subconsultant to Willdan Engineering. The V&A flow monitoring report is contained in Appendix ‘L-4’. The nine flow monitoring site locations and corresponding findings are presented in the report.

Each sites flow monitoring data was reviewed and compared to the contributing SMZ area.

The peak monitored flow rate was compared to the design flow rate and the shape of the outflow curve was compared to the SMZ modeled result. The flow monitoring data was also compared to other data from previous studies in other cities to verify the results. As previously mentioned there was reasonable correlation indicated in most of the zones monitored, but two or three of the nine areas showed some unusual low and high correlation results that must be reviewed and discussed with the subconsultant in order to determine their significance, if any, to the capacity evaluation results. Some difference is expected because the design flow rate includes the maximum flow rate expected from each development type, wet weather inflow/infiltration, and design safety factors.

Appendix ‘L’
Recommended Deficiency Correction Projects
Presented in Table 3 is a brief summary of the measures recommended to correct the deficiencies stated above and as shown on Exhibit 2. The criteria for recommending and prioritizing relief facilities are as follows:

Priority 1
Sewers with critical deficiencies of d/D > 0.85 are recommended for correction first. The correction can be undertaken immediately if further engineering review discloses such an immediate need. Otherwise replacement within 1 to 4 years is considered reasonable.

Priority 2
Sewers with critical deficiencies of 0.64 < d/D < 0.85 are recommended for correction second. These corrections can usually be programmed somewhere between 5 to 9 years from the evaluation date depending upon further engineering review findings.

Priority 3
Sewers with a d/D < 0.64 are not capacity deficient; therefore, are not ranked here, but it is recommended that such segments be monitored as sewage flows tributary to the locations increase over time.

Sewer System Improvements Costs
The unit prices shown in the engineer’s estimate (see Appendix ‘L-1’) represent the anticipated construction cost only as applicable for mid-2008. Bid prices received on jobs of similar nature in Southern California area were one source of information used to derive the cost figure. In addition, manufacturers, suppliers of material and equipment, and local contractors were consulted on various cost items. An additional 35% of construction cost is added to cover the cost of contingencies, design engineering, contract administration and construction observation.

The Engineer’s Estimate does not include an adjustment for inflation. Construction costs can be expected to fluctuate as corresponding changes occur in the national or local economy.

One available indicator of these changes is the Engineering News-Record Construction Cost Index for the Los Angeles metropolitan area. This index is compiled from actual construction cost data for materials and labor and is reported in Engineering News-Record magazine. It is suggested that this index be used to update the unit prices presented in Appendix ‘L-1’ and in adjusting the estimate from the date of the initial estimates.

Financing of Improvements
General
Appendix ‘L’
Funding considerations are often the deciding factor in scoping and implementation of a project.

There are, of course, numerous methods or mix of methods, which could be used to finance the implementation of a sewer system capital improvement plan (CIP), and the ongoing operations and maintenance activities. Among these methods are:

1. Pay-as-You-Go Financing (rates, fees and charges based)

2. Redevelopment Agency Funding

3. State Assistance Programs

4. Municipal Securities

5. Improvement Districts

6. Federal Assistance Programs
In discussion that follows, the above funding options are briefly described and their adaptability to specific circumstances of a sewer system CIP are noted. In evaluating specific funding programs, services of financial and legal experts in such issues are recommended.

Methods of Financing

1. Pay-as-You-Go Financing:

2. Redevelopment Agency Funding:

Funds generated from property tax increment revenue, received by the City's redevelopment agency (RDA), is a possible source for sewer system capital improvements, within or beneficial to the RDA. A sewer system improvement project would have to compete with other agency planned projects, prioritized and an agency funding decision.

3. State Assistance Programs:

Under the rules and regulations of the Federal Water Pollution Control Act (Clean Water Act or CWA) and the Federal Safe Drinking Water Act (SDWA), the State has enacted the Clean Water State Revolving Fund (CWSRF) and the Drinking Water Revolving Fund (DWSRF), respectively. These programs are funded by Federal grants, State funds and Revenue bonds. The CWSRF Loan Program provides low-interest loan funding for Appendix ‘L’
construction of publicly-owned wastewater treatment facilities, sewers, sewer interceptors, water recycling facilities, as well as implementation of non-point source (NPS) projects or programs. There are different types of funding assistance available under these programs. www.waterboards.ca.gov/water_issues/programs/grants_loans/srf/ The Department of Water Resources administers the State bond law programs for Water supply/Water quality, Water conservation, Flood management and Regional water management. www.grantsloans.water.ca.gov
The State Water Resources Control Board administers the State revolving fund loans, Water recycling grants & loans, Small community grants, Agricultural drainage loans, Agricultural drainage management loans, Clean beaches initiative grants, Agricultural water quality grants, Areas of special biological significance (ASBS) grants, Storm water grants, and Santa Monica bay restoration commission grants. www.waterboards.ca.gov The State Department of Public Health administers the DWSRF, Proposition 84 funding for public water systems, and Proposition 50 for the water security, clean drinking water, coastal and beach protection act of 2002 loans. www.cdph.ca.gov Various types of infrastructure improvement/construction loans can be arranged through the California Infrastructure and Economic Development Bank (I Bank) www.ibank,ca,gov
Limited amounts of public works grant funds have been available to agencies from the State Office of Economic Development. Use of such grant funds must result in the creation of new, permanent jobs in the private sector. In order to ensure that the funds are ultimately assisting those in most need, projects eligible for consideration must be those in areas designated eligible for HUD Urban Development Action Grants (UDAG), EDA Sudden or Long-term Economic Deterioration, or EDA Designated Special Impact Area.

4. Municipal Securities:

However, the Jarvis-Gann Amendment (Proposition 13 of 1978) prohibits the levying of ad valorem property taxes beyond pre-existing authorizations and levels (pre- July 1, 1978).

Therefore, authorization and issuance of GOB’s is not considered feasible under current law.

An option to GOB’s is the issuance of a specific type note or bond form, such as a revenue anticipation note (RAN) or a tax anticipation note (TAN) or a certificate of participation (COP) or various combinations of available authorities that can be used to fund public infrastructure needs. These types of municipal securities (Munis) are generally tax- exempt and commonly used to fund public works infrastructure and facilities. Many states also exempt their securities from their own taxes, which makes those securities particularly attractive investments for their own residents.

Appendix ‘L’
TAN’s and RAN’s are instruments backed by anticipated taxes or revenues respectively.

When Munis are being considered for funding of improvements, consultation with an experienced and qualified financing consultant and bond counsel are a must.

5. Improvement Districts:

In general, special assessment district procedures have been established by statute to provide for financing of construction and/or acquisition of public works improvements, such as sewer systems, and for assessing the cost of such improvements to the benefiting properties.

Under all assessment proceedings, the cost of the work is assessed against properties within the benefited area. The assessments are levied in specific amounts against each individual property on the basis of the benefit each parcel receives. The property owner may pay the assessment in cash during the cash collection period of 30 days. But, if any assessments are not paid in cash during that period, bonds are usually issued to represent the unpaid assessments and the benefited properties are assessed on their annual property tax bill over a usual period of 10 to 20 years.

6. Federal Assistance Programs:

Appendix ‘L’
Historically, federal programs administered by the Economic Development Administration (EDA) provide financial and technical assistance to aid the economic development of areas with high unemployment or low family income levels. Communities must make long-range plans for economic growth in order to be eligible for EDA financial assistance, in the form of grants and loans for public works and development that generates jobs and economic opportunity. Typical public works projects include construction of roads, water and sewer lines, and public facilities. To determine the status requires timely monitoring.

Under the rules and regulations of the Housing and Community Development Act of 1974, the Community Development Block Grant (CDBG) program can fund housing and community development needs. This includes part or all of improvements necessary to upgrade existing sewer facilities. Those qualifying geographic areas within the City that have the greatest overall deficiency in physical infrastructure receive the highest priority according to CDBG criteria. When the sewer system has a defined deficiency, then it is appropriate to use CDBG funds to meet health and safety standards as well as to encourage up-grading of abutting housing and physical environment.

The primary statutory objective of the CDBG program is to develop viable communities by providing decent housing and a suitable living environment and by expanding economic opportunities, principally for persons of low- and moderate-income. Communities receiving CDBG funds through the State may use the funds for many kinds of community development activities including, but not limited to:
• acquisition of property for public purposes;
• construction or reconstruction of streets, water and sewer facilities, neighborhood centers, recreation facilities, and other public works; • demolition;
• rehabilitation of public and private buildings;
• public services;
• planning activities;
• assistance to nonprofit entities for community development activities; and • assistance to private, for profit entities to carry out economic development activities (including assistance to micro-enterprises).
www.hcd.ca.gov/ca/cdbg/about/html
The United State Department of Agriculture Rural Development Program provides communities with population less than 50,000 a variety of direct-guaranteed-loans and /or grants. These include water and wastewater system improvement funding. www.rurdev.usa.gov/ca
Appendix ‘L’
APPENDIX ‘L-1’
Engineer’s Opinion of Cost

CITY OF AGOURA HILLS
SANITARY SEWER IMPROVEMENTS Date: 6/26/2009

ENGINEER'S OPINION OF COST
PRIORITY #1 AND #2 SUMMARY Prepared by: J.H.

PROJECT: SEWER SYSTEM MANAGEMENT PLAN Checked by: R.W.

ITEM DESCRIPTION AMOUNT
NO.
1 SUB-TOTAL PRIORITY #1 SEWER IMPROVEMENTS $ 550,000
2 SUB-TOTAL PRIORITY #2 SEWER IMPROVEMENTS $ 1,420,000
3 TOTAL1, 2 $ 1,970,000
2 Since the design professional has no control over the cost of labor, materials, equipment, or over the contractor’s method of determining prices, or over competitive bidding or market conditions, his opinions of probable construction costs provided herein are to be made on the basis of his experience and qualifications. These cost opinions represent his best judgment as a design professional familiar with the construction industry. However, the design professional cannot and does not guarantee that proposals, bids, or the construction costs will not vary from opinions of probable cost prepared by him. 1 Price taken from actual bid of District 3A Sanitary Sewer Improvement for 325 LF of 10" VCP in the City of La Canada Flintridge plus $83/LF for mobilization, traffic control, and traffic markings.

SSMP APPENDIX 'L' Page 1
City of Agoura Hills

CITY OF AGOURA HILLS
SANITARY SEWER IMPROVEMENTS Date: 6/26/2009

ENGINEER'S OPINION OF COST
PRIORITY #1 Prepared by: J.H.

PROJECT: SEWER SYSTEM MANAGEMENT PLAN Checked by: R.W.

ITEM DESCRIPTION QUANTITY UNITS UNIT TOTAL
NO. COST COST
1 MOBILIZATION (5%) 1 LS 7,438 $ 7,438 $
2 12" VCP SEWER MAIN 610 LF 175 $ 106,750 $
3 MANHOLE 6 EA 7,000 $ 42,000 $
4 SEWER BY-PASS (20%) 1 LS 29,750 $ 29,750 $
5 TRAFFIC CONTROL (10%) 1 LS 14,875 $ 14,875 $
SUBTOTAL CONSTRUCTION: 200,813 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 70,284 $ AREA TOTAL: 271,097 $
SAY 271,100 $
1 MOBILIZATION (5%) 1 LS 1,014 $ 1,014 $
2 18" VCP SEWER MAIN 33 LF 190 $ 6,270 $
3 MANHOLE 2 EA 7,000 $ 14,000 $
4 SEWER BY-PASS (20%) 1 LS 4,054 $ 4,054 $
5 TRAFFIC CONTROL (10%) 1 LS 2,027 $ 2,027 $
SUBTOTAL CONSTRUCTION: 27,365 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 9,578 $ AREA TOTAL: 36,942 $
SAY 36,900 $
1 MOBILIZATION (5%) 1 LS 3,596 $ 3,596 $
2 12" VCP SEWER MAIN 331 LF 175 $ 57,925 $
3 MANHOLE 2 EA 7,000 $ 14,000 $
4 SEWER BY-PASS (20%) 1 LS 14,385 $ 14,385 $
5 TRAFFIC CONTROL (10%) 1 LS 7,193 $ 7,193 $
SUBTOTAL CONSTRUCTION: 97,099 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 33,985 $ AREA TOTAL: 131,083 $
SAY 131,000 $
AREA 17
AREA 20
AREA 23
SSMP APPENDIX 'L' Page 1
City of Agoura Hills

ITEM DESCRIPTION QUANTITY UNITS UNIT TOTAL
NO. COST COST
1 MOBILIZATION (5%) LS 1 $ 3,075 $ 3,075
2 15" VCP SEWER MAIN LF 250 $ 190 $ 47,500
3 MANHOLE EA 2 $ 7,000 $ 14,000
4 SEWER BY-PASS (20%) LS 1 $ 12,300 $ 12,300
5 TRAFFIC CONTROL (10%) LS 1 $ 6,150 $ 6,150
SUBTOTAL CONSTRUCTION: 83,025 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 29,059 $ AREA TOTAL: 112,084 $
SAY 112,100 $
SUB-TOTAL PRIORITY #1 SANITARY SEWER IMPROVEMENTS 551,100 $ SAY 550,000 $
AREA 26
SSMP APPENDIX 'L' Page 2
City of Agoura Hills

ITEM DESCRIPTION QUANTITY UNITS UNIT TOTAL
NO. COST COST
SANITARY SEWER IMPROVEMENTS Date: 6/26/2009

ENGINEER'S OPINION OF COST
PRIORITY #2 Prepared by: J.H.

PROJECT: SEWER SYSTEM MANAGEMENT PLAN Checked by: R.W.

ITEM DESCRIPTION QUANTITY UNITS UNIT TOTAL
NO. COST COST
1 MOBILIZATION (5%) 1 LS 2,548 $ 2,548 $
2 10" VCP SEWER MAIN 224 LF 165 $ 36,960 $
3 MANHOLE 2 EA 7,000 $ 14,000 $
4 SEWER BY-PASS (20%) 1 LS 10,192 $ 10,192 $
5 TRAFFIC CONTROL (10%) 1 LS 5,096 $ 5,096 $
SUBTOTAL CONSTRUCTION: 68,796 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 24,079 $ AREA TOTAL: 92,875 $
SAY 92,900 $
1 MOBILIZATION (5%) 1 LS 3,550 $ 3,550 $
2 15" VCP SEWER MAIN 300 LF 190 $ 57,000 $
3 MANHOLE 2 EA 7,000 $ 14,000 $
4 SEWER BY-PASS (20%) 1 LS 14,200 $ 14,200 $
5 TRAFFIC CONTROL (10%) 1 LS 7,100 $ 7,100 $
SUBTOTAL CONSTRUCTION: 95,850 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 33,548 $ AREA TOTAL: 129,398 $
SAY 129,400 $
1 MOBILIZATION (5%) 1 LS 2,548 $ 2,548 $
2 10" VCP SEWER MAIN 224 LF 165 $ 36,960 $
3 MANHOLE 2 EA 7,000 $ 14,000 $
4 SEWER BY-PASS (20%) 1 LS 10,192 $ 10,192 $
5 TRAFFIC CONTROL (10%) 1 LS 5,096 $ 5,096 $
SUBTOTAL CONSTRUCTION: 68,796 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 24,079 $ AREA TOTAL: 92,875 $
SAY 92,900 $
AREA 20
AREA 26
AREA 17
SSMP APPENDIX 'L' Page 3
City of Agoura Hills

ITEM DESCRIPTION QUANTITY UNITS UNIT TOTAL
NO. COST COST
1 MOBILIZATION (5%) LS 1 $ 14,954 $ 14,954
2 10" VCP SEWER MAIN LF 225 $ 165 $ 37,125
3 12" VCP SEWER MAIN LF 326 $ 175 $ 57,050
4 15" VCP SEWER MAIN LF 710 $ 190 $ 134,900
5 MANHOLE EA 10 $ 7,000 $ 70,000
6 SEWER BY-PASS (20%) LS 1 $ 59,815 $ 59,815
7 TRAFFIC CONTROL (10%) LS 1 $ 29,908 $ 29,908
SUBTOTAL CONSTRUCTION: 403,751 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 141,313 $ AREA TOTAL: 545,064 $
SAY 545,000 $
1 MOBILIZATION (5%) LS 1 $ 2,284 $ 2,284
2 10" VCP SEWER MAIN LF 192 $ 165 $ 31,680
3 MANHOLE EA 2 $ 7,000 $ 14,000
4 SEWER BY-PASS (20%) LS 1 $ 9,136 $ 9,136
5 TRAFFIC CONTROL (10%) LS 1 $ 4,568 $ 4,568
SUBTOTAL CONSTRUCTION: 61,668 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 21,584 $ AREA TOTAL: 83,252 $
SAY 83,300 $
1 MOBILIZATION (5%) LS 1 $ 3,431 $ 3,431
2 10" VCP SEWER MAIN LF 331 $ 165 $ 54,615
3 MANHOLE EA 2 $ 7,000 $ 14,000
4 SEWER BY-PASS (20%) LS 1 $ 13,723 $ 13,723
5 TRAFFIC CONTROL (10%) LS 1 $ 6,862 $ 6,862
SUBTOTAL CONSTRUCTION: 92,630 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 32,421 $ AREA TOTAL: 125,051 $
SAY 125,100 $
AREA 31
AREA 30
AREA 29
SSMP APPENDIX 'L' Page 4
City of Agoura Hills

ITEM DESCRIPTION QUANTITY UNITS UNIT TOTAL
NO. COST COST
1 MOBILIZATION (5%) LS 1 $ 3,192 $ 3,192
2 10" VCP SEWER MAIN LF 302 $ 165 $ 49,830
3 MANHOLE EA 2 $ 7,000 $ 14,000
4 SEWER BY-PASS (20%) LS 1 $ 12,766 $ 12,766
5 TRAFFIC CONTROL (10%) LS 1 $ 6,383 $ 6,383
SUBTOTAL CONSTRUCTION: 86,171 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 30,160 $ AREA TOTAL: 116,330 $
SAY 116,300 $
1 MOBILIZATION (5%) LS 1 $ 6,473 $ 6,473
2 15" VCP SEWER MAIN LF 534 $ 190 $ 101,460
3 MANHOLE EA 4 $ 7,000 $ 28,000
4 SEWER BY-PASS (20%) LS 1 $ 25,892 $ 25,892
5 TRAFFIC CONTROL (10%) LS 1 $ 12,946 $ 12,946
SUBTOTAL CONSTRUCTION: 174,771 $
(35% of Construction) ENGINEERING, CONTRACT ADMIN, INSPECTION, AND CONTINGENCY: 61,170 $ AREA TOTAL: 235,941 $
SAY 235,900 $
SUB-TOTAL PRIORITY #2 SANITARY SEWER IMPROVEMENTS 1,420,785 $ SAY 1,420,000 $
AREA 35
AREA 41
Since the design professional has no control over the cost of labor, materials, equipment, or over the contractor’s method of determining prices, or over competitive bidding or market conditions, his opinions of probable construction costs provided herein are to be made on the basis of his experience and qualifications.

These costs opinions represent his best judgment as a design professional familiar with the construction industry. However, the design professional cannot and does not guarantee that proposals, bids, or the construction costs will not vary from opinions of probable cost prepared by him.

SSMP APPENDIX 'L' Page 5
Appendix ‘L’
APPENDIX ‘L-2’
Sewer System Capacity Analysis
Deficient Pipes Exhibit

Appendix ‘L’
APPENDIX ‘L-3’
Pizer Hydra version 6.4 Hydraulic Calculations

Appendix ‘L’
APPENDIX ‘L-4’
Flow Monitoring Report – V&A Engineering
Report dated May 2009

SANITARY SEWER FLOW MONITORING
City of Agoura Hills
May 2009
City of Agoura Hills

SANITARY SEWER FLOW MONITORING
AND

CAPACITY ANALYSIS

Prepared for:

VENTURA REGIONAL SANITATION DISTRICT
1001 Partridge Drive, Suite 150
Ventura, CA 93003-0704
Prepared by:

V&A
8291 Aero Place, Suite 110
San Diego, CA 92123
May 2009
<F:\09-0027\09-0027FRpt.doc >
City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis TOC

TABLE OF CONTENTS
DESCRIPTION PAGE NO.

EXECUTIVE SUMMARY......................................................................................................................... 1 INTRODUCTION ..................................................................................................................................... 4 FLOW MONITORING METHODS AND PROCEDURES....................................................................... 5 Meter Installation....................................................................................................................... 5 Explanation of Report Graphs and Definition of Terms....................................................... 6 FINDINGS................................................................................................................................................ 7 Flow Monitoring Results........................................................................................................... 7 Pipeline Capacity...................................................................................................................... 7 TABLES
Table 1. Summary of Flow Monitoring Data.......................................................................................... 1 Table 2. Flow Monitoring Results .......................................................................................................... 7 Table 3. Average Dry Weather Flow and Peak Measured Flow as Percent of Capacity ..................... 8

FIGURES
Figure 1. Peak Flow Cross-Sectional View Snapshots......................................................................... 3 Figure 2. Map of Flow Monitoring Sites................................................................................................. 4 Figure 3. Flow Meter Installation Diagram............................................................................................. 5 Figure 4. Diagram of Hypothetical Diurnal Flow over Monitoring Period .............................................. 6 Figure 5. MH 33 Average Daily Flow Graph.......................................................................................... 7 Figure 6. MH 259 Stage Curve.............................................................................................................. 8 Figure 7. Peak Flow Cross-Sectional View Snapshots......................................................................... 9 APPENDIX A – Graphs, Figures and Tables
City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

Page 1 ends

EXECUTIVE SUMMARY
V&A has completed a sanitary sewer flow monitoring and capacity study within the City of Agoura Hills, California. Nine sites were monitored for 4 weeks from March 24, 2009 to April 20, 2009. The purpose of this study was to investigate the existing flow volume through the sanitary sewer pipes at the flow monitoring locations, and identify the potential impacts on the capacity at the flow monitoring location.

The results of the sanitary sewer flow monitoring are summarized in Table 1. Snapshots of the pipe cross-section during peak measured flows are illustrated in Figure 1. Please refer to Figure 2 for the flow monitoring site locations.

Table 1. Summary of Flow Monitoring Data
ADWF Peak Measured Flow
Site
Estimated
100%
Capacity
of Line
(mgd)
Total
(mgd)
% of
Capacity
(by Volume)
% of
Capacity
(by Level)
Total
(mgd)
% of
Capacity
(by Volume)
% of
Capacity
(by Level)
MH 25 9.00 0.17 1.9% 12.5% 0.26 2.9% 14.7%
MH 29 4.50 0.04 0.9% 6.7% 0.13 2.8% 13.9%
MH 33 1.90 0.09 4.7% 17.2% 0.24 12.4% 28.8%
MH 42 5.00 0.18 3.7% 16.2% 0.41 8.1% 24.0%
MH 84 4.00 0.01 0.2% 4.7% 0.04 1.1% 12.5%
MH 85 0.95 0.06 6.6% 22.5% 0.15 15.4% 33.1%
MH 178 1.10 0.09 8.0% 25.2% 0.27 24.4% 43.4%
MH 203 4.50 0.09 2.0% 11.4% 0.20 4.5% 17.1%
MH 259 1.70 0.14 8.2% 24.6% 0.35 20.7% 41.0%
City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

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15%
MH 25 MH 29

MH 33 MH 42

MH 84 MH 85
13%
33%
14%
29%
24%
City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

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MH 178 MH 203

MH 259
Figure 1. Peak Flow Cross-Sectional View Snapshots
41%
17%
43%
City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

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INTRODUCTION
V&A was retained by the Ventura Regional Sanitation District (VRSD) to conduct a sanitary sewer flow monitoring and capacity study at nine locations within the City of Agoura Hills. The purpose of the study was to record and report the existing flow volume through the sanitary sewer pipe, and identify the potential impacts on the capacity at the flow monitoring locations. Flow monitoring was conducted over a 4-week period from March 24, 2009 to April 20, 2009. Figure 2 illustrates the location of the manholes where the flow meters were installed.

MH 178
MH 33
MH 203
MH 84
MH 25
MH 85
MH 259
MH 29
MH 42 MH 178
MH 33
MH 203
MH 84
MH 25
MH 85
MH 259
MH 29
MH 42
Figure 2. Map of Flow Monitoring Sites
City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

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FLOW MONITORING METHODS AND PROCEDURES
Meter Installation
Nine Isco 2150 area-velocity flow meters were installed by V&A in the sewer manholes shown in Figure 2. Isco meters use a pressure transducer to collect depth readings, and ultrasonic Doppler sensors on the probe determine the average fluid velocity. Figure 3 shows a diagram of a typical flow meter installation.

Figure 3. Flow Meter Installation Diagram
Manual level and velocity measurements were taken in the field during the flow meter installation and again when the meters were removed. These manual measurements are compared to the instantaneous level and velocity readings of the flow meters to ensure proper calibration and accuracy. The continuous depth and velocity readings were recorded by the flow meters in 15-minute increments and downloaded into a computer spreadsheet program where the data could be analyzed and made report-ready.

City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

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Explanation of Report Graphs and Definition of Terms
Flow versus time graphs are created by plotting the data recorded by the flow meters in 15-minute intervals. The graphs represent the diurnal flow curve recorded over a given monitoring period and represent the data in its rawest form. Figure 4 shows a typical diurnal flow curve and identified on this graph are the hypothetical peak, low, and average flows recorded over an example monitoring period.

These graphs are useful in identifying the extreme limits of the flows being monitored, and identifying any trends that might be occurring at a particular site. The graphs for flow, level and velocity versus time for this project are provided in Appendix A of this report.

Flow
Time over Monitoring Period
Peak Flow of
Monitoring Period
24-Hour Cycle
Average Flow over
Monitoring Period
Low Flow of
Monitoring Period
Flow
Time over Monitoring Period
Peak Flow of
Monitoring Period
24-Hour Cycle
Average Flow over
Monitoring Period
Low Flow of
Monitoring Period
Figure 4. Diagram of Hypothetical Diurnal Flow over Monitoring Period Dry weather flow is the flow that is caused by actual waste drainage from buildings in the area. Wet weather flow includes rain-dependent infiltration and inflow which may increase the flow through the sewer pipes. The flows recorded during this study were dry weather flows only.

City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

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FINDINGS
Flow Monitoring Results
The recorded flows showed diurnal flow patterns with peaks in the early morning and late afternoon hours. Figure 5 plots the average daily weekday and weekend flow for Manhole 33. Table 2 summarizes the flow monitoring data at the monitoring sites during the monitoring period. Additional plots and tables summarizing the flows at the monitoring sites are shown in Appendix A.

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00 Hour
Flow (MGD)
Weekday
Weekend
Weekday: Ave = 0.09 MGD Peak = 0.15 MGD at 8:30
Weekend: Ave = 0.09 MGD Peak = 0.15 MGD at 9:00
Figure 5. MH 33 Average Daily Flow Graph
Table 2. Flow Monitoring Results
Location
Weekday
Average
Flow
(mgd)
Weekend
Average
Flow
(mgd)
ADWF**
(mgd)
Weekend
to
Weekday
Ratio
Peak
Measured
Flow
(mgd)
Peak to
ADWF
Ratio
MH 25 0.17 0.17 0.17 1.00 0.26 1.51
MH 29 0.04 0.04 0.04 0.89 0.13 3.20
MH 33 0.09 0.09 0.09 1.01 0.24 2.65
MH 42 0.18 0.19 0.18 0.99 0.41 2.20
MH 84 0.01 0.01 0.01 1.06 0.04 7.16
MH 85 0.06 0.06 0.06 0.98 0.15 2.34
MH 178 0.09 0.09 0.09 1.10 0.27 3.05
MH 203 0.09 0.09 0.09 1.01 0.20 2.21
MH 259 0.14 0.14 0.14 1.12 0.35 2.51
**ADWF calculated as (5*weekday+2*weekend)/7
A The ADWF graph is generated by averaging each 15-minute period for the weekday/weekend days of this study. The peak flows shown in this graph are not the same as peak measured flow, but a “typical expected” peak flow for an average day.

City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

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Pipeline Capacity
The pipeline capacity is estimated based on the measured data from the flow metering sites. The metered flow data is plotted over the Manning’s Equation flow curve and extrapolated to a full-flow scenario, as shown in Figure 6 for Manhole 259.

0.0 0.2

0.4 0.6

0.8 1.0

1.2 1.4

1.6 012345678
Level (in.)
Flow (MGD)
Scatter
Mannings Flow Curve, Variable n
Figure 6. MH 259 Stage Curve
Table 3 summarizes the capacity data including the average dry weather flow and peak measured flow as a percent of the pipe capacity. Figure 7 shows the cross-sectional snapshots of these conditions.

Table 3. Average Dry Weather Flow and Peak Measured Flow as Percent of Capacity Site
100%
Capacity
of Line
(mgd)
ADWF
(mgd)
ADWF
as % of
Capacity
(by
Volume)
ADWF
as % of
Capacity
(by
Level)
Peak
Measured
Flow
(mgd)
Peak
Flow
as % of
Capacity
(by Volume)
Peak
Flow
as % of
Capacity
(by Level)
MH 25 9.00 0.17 1.9% 12.5% 0.26 2.9% 14.7%
MH 29 4.50 0.04 0.9% 6.7% 0.13 2.8% 13.9%
MH 33 1.90 0.09 4.7% 17.2% 0.24 12.4% 28.8%
MH 42 5.00 0.18 3.7% 16.2% 0.41 8.1% 24.0%
MH 84 4.00 0.01 0.2% 4.7% 0.04 1.1% 12.5%
MH 85 0.95 0.06 6.6% 22.5% 0.15 15.4% 33.1%
MH 178 1.10 0.09 8.0% 25.2% 0.27 24.4% 43.4%
MH 203 4.50 0.09 2.0% 11.4% 0.20 4.5% 17.1%
MH 259 1.70 0.14 8.2% 24.6% 0.35 20.7% 41.0%
ADWF = Average Dry Weather Flow
City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

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15%
MH 25 MH 29

MH 33 MH 42

MH 84 MH 85
Figure 7. Peak Flow Cross-Sectional View Snapshots
13%
33%
14%
29%
24%
City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis

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MH 178 MH 203

MH 259
Figure 7. Peak Flow Cross-Sectional View Snapshots (cont.) 41%
17%
43%
City of Agoura Hills: Sanitary Sewer Flow Monitoring and Capacity Analysis Appendix

APPENDIX A
FLOW MONITORING SITE: GRAPHS, FIGURES & TABLES
Monitoring Site:

Location:

Size/Type Line:

MH 25
Canwood Street and Reyes Adobe Road
10-inch Sanitary Sewer Pipe
Temporary Flow Monitoring Study
Sanitary Sewer Collection System
Data Summary Report
MH 25
Location: Canwood Street and Reyes Adobe
Road
Diameter: 10 inches
Site Information Monitoring Site:

Report
Average Dry Weather Flow: 0.17
Peak Measured Flow: 0.26
mgd
mgd
Flow Sketch
Street View Photo
Satellite Map
Sanitary Map
Plan View Photo
MH 25
Site Information Report Monitoring Site:

Photos
Manhole Lid
East Inlet
MH 25
Site Information Report Monitoring Site:

Photos
North Inlet
West Outlet

0.00 0.100.200.300.400.500.60
24-Mar
Tue
25-Mar
Wed
26-Mar
Thu
27-Mar
Fri
28-Mar
Sat
29-Mar
Sun
30-Mar
Mon
31-Mar
Tue
1-Apr
Wed
2-Apr
Thu
3-Apr
Fri
4-Apr
Sat
5-Apr
Sun
6-Apr
Mon
7-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)
Rain Flow BLFlow
MH 25
Period Flow Summary Monitoring Site:

0.172

0.173

0.166

0.165

0.168

0.169

0.172

0.166

0.171

0.168

0.172

0.177

0.176

0.170

0.171

0.180

0.176

0.172

0.168

0.000.050.100.150.20
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20
Flow (MGal)

0.00.40.81.21.62.02.42.8 Rainfall (in/day)

0.000.100.200.300.400.500.60
7-Apr
Tue
8-Apr
Wed
9-Apr
Thu
10-Apr
Fri
11-Apr
Sat
12-Apr
Sun
13-Apr
Mon
14-Apr
Tue
15-Apr
Wed
16-Apr
Thu
17-Apr
Fri
18-Apr
Sat
19-Apr
Sun
20-Apr
Mon
21-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)

0.167

0.170

0.169

0.174

0.172

0.173

0.164

0.177

0.000.050.100.150.20
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.4 0.00 2.80.050.100.150.20
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.42.8 March 24, 2009 to April 21, 2009 Total Monthly Rainfall: 0.07 inches Avg Flow: 0.17 mgd Peak Flow: 0.26 mgd Min Flow: 0.08 mgd MH 25
Monitoring Site: Average Dry Weather Flow
15 %
12 %
Peak Measured Flow:

0.26 mgd
Average Dry Weather Flow:

0.17 mgd

0.000.050.100.150.200.25
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Flow (mgd)
WeekdayWeekend
Peak measured flow shown in weekly
graphs on following pages
MH 25
Level, Velocity and Flow Monitoring Site:

From 3/23/2009 to 3/30/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 3/23 3/24 3/25 3/26 3/27 3/28 3/29
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.23 in. Peak Level: 1.42 in. Min Level: 0.99 in. 5 Avg Velocity: 6.69 fps Peak Velocity: 8.47 fps Min Velocity: 4.2 fps 5 Avg Flow: 0.169 mgd Peak Flow: 0.25 mgd Min Flow: 0.076 mgd 5 MH 25
Level, Velocity and Flow Monitoring Site:

From 3/30/2009 to 4/6/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 3/30 3/31 4/1 4/2 4/3 4/4 4/5
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.24 in. Peak Level: 1.43 in. Min Level: 1.04 in. 5 Avg Velocity: 6.73 fps Peak Velocity: 8.48 fps Min Velocity: 4.56 fps 5 Avg Flow: 0.17 mgd Peak Flow: 0.253 mgd Min Flow: 0.094 mgd 2 5 MH 25
Level, Velocity and Flow Monitoring Site:

From 4/6/2009 to 4/13/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 4/6 4/7 4/8 4/9 4/10 4/11 4/12
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.25 in. Peak Level: 1.47 in. Min Level: 1 in. 5 Avg Velocity: 6.74 fps Peak Velocity: 8.45 fps Min Velocity: 4.42 fps 5 Avg Flow: 0.174 mgd Peak Flow 3 5 : 0.261 mgd Min Flow: 0.088 mgd MH 25
Level, Velocity and Flow Monitoring Site:

From 4/13/2009 to 4/20/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 4/13 4/14 4/15 4/16 4/17 4/18 4/19
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.25 in. Peak Level: 1.46 in. Min Level: 1.02 in. 5 Avg Velocity: 6.73 fps Peak Velocity: 8.31 fps Min Velocity: 4.65 fps 5 Avg Flow: 0.173 mgd Peak Flow 4 5 : 0.253 mgd Min Flow: 0.09 mgd MH 25
Level, Velocity and Flow Monitoring Site:

From 4/20/2009 to 4/27/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 4/20 4/21 4/22 4/23 4/24 4/25 4/26
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.22 in. Peak Level: 1.42 in. Min Level: 1 in. 5 Avg Velocity: 6.76 fps Peak Velocity: 8.12 fps Min Velocity: 4.73 fps 5 Avg Flow: 0.168 mgd Peak Flow 5 5 : 0.244 mgd Min Flow: 0.092 mgd Monitoring Site:

Location:

Size/Type Line:

MH 29
Canwood Street and Christian Court
8-inch Sanitary Sewer Pipe
Temporary Flow Monitoring Study
Sanitary Sewer Collection System
Data Summary Report
MH 29
Location: Canwood Street and Christian Court
Diameter: 8 inches
Site Information Monitoring Site:

Report
Average Dry Weather Flow: 0.04
Peak Measured Flow: 0.13
mgd
mgd
Flow Sketch
Street View Photo
Satellite Map
Sanitary Map
Plan View Photo
MH 29
Site Information Report Monitoring Site:

Photos
North Inlet
North Inlet
MH 29
Site Information Report Monitoring Site:

Photos
South Oulet

0.00 0.020.040.060.080.100.120.140.16
24-Mar
Tue
25-Mar
Wed
26-Mar
Thu
27-Mar
Fri
28-Mar
Sat
29-Mar
Sun
30-Mar
Mon
31-Mar
Tue
1-Apr
Wed
2-Apr
Thu
3-Apr
Fri
4-Apr
Sat
5-Apr
Sun
6-Apr
Mon
7-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)
Rain Flow BLFlow
MH 29
Period Flow Summary Monitoring Site:

0.038

0.036

0.035

0.037

0.040

0.044

0.039

0.038

0.039

0.044

0.052

0.039

0.036

0.040

0.037

0.038

0.034

0.040

0.036

0.038

0.000.010.020.030.040.050.06
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20
Flow (MGal)

0.00.40.81.21.62.02.42.8 Rainfall (in/day)

0.000.020.040.060.080.100.120.140.16
7-Apr
Tue
8-Apr
Wed
9-Apr
Thu
10-Apr
Fri
11-Apr
Sat
12-Apr
Sun
13-Apr
Mon
14-Apr
Tue
15-Apr
Wed
16-Apr
Thu
17-Apr
Fri
18-Apr
Sat
19-Apr
Sun
20-Apr
Mon
21-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)

0.037

0.043

0.039

0.044

0.040

0.037

0.039

0.000.010.020.030.040.050.06
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.4 0.00 2.80.010.020.030.040.050.06
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.42.8 March 24, 2009 to April 21, 2009 Total Monthly Rainfall: 0.07 inches Avg Flow: 0.04 mgd Peak Flow: 0.13 mgd Min Flow: 0.01 mgd MH 29
Monitoring Site: Average Dry Weather Flow
14 %
7%
Peak Measured Flow:

0.13 mgd
Average Dry Weather Flow:

0.04 mgd

0.000.010.020.030.040.050.060.070.08
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Flow (mgd)
WeekdayWeekend
Peak measured flow shown in weekly
graphs on following pages
MH 29
Level, Velocity and Flow Monitoring Site:

From 3/23/2009 to 3/30/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 3/23 3/24 3/25 3/26 3/27 3/28 3/29
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.51 in. Peak Level: 0.76 in. Min Level: 0.39 in. 8 Avg Velocity: 6.05 fps Peak Velocity: 8.41 fps Min Velocity: 3.6 fps 8 Avg Flow: 0.038 mgd Peak Flow: 0.08 mgd Min Flow: 0.018 mgd 8 MH 29
Level, Velocity and Flow Monitoring Site:

From 3/30/2009 to 4/6/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 3/30 3/31 4/1 4/2 4/3 4/4 4/5
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.54 in. Peak Level: 0.81 in. Min Level: 0.39 in. 8 Avg Velocity: 5.95 fps Peak Velocity: 8.54 fps Min Velocity: 3.48 fps 8 Avg Flow: 0.04 mgd Peak Flow: 0.095 mgd Min Flow: 0.018 mgd 2 8 MH 29
Level, Velocity and Flow Monitoring Site:

From 4/6/2009 to 4/13/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 4/6 4/7 4/8 4/9 4/10 4/11 4/12
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.55 in. Peak Level: 1.11 in. Min Level: 0.3 in. 8 Avg Velocity: 6.04 fps Peak Velocity: 8.61 fps Min Velocity: 3.46 fps 8 Avg Flow: 0.042 mgd Peak Flow 3 8 : 0.127 mgd Min Flow: 0.014 mgd MH 29
Level, Velocity and Flow Monitoring Site:

From 4/13/2009 to 4/20/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 4/13 4/14 4/15 4/16 4/17 4/18 4/19
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.52 in. Peak Level: 0.75 in. Min Level: 0.32 in. 8 Avg Velocity: 5.85 fps Peak Velocity: 8.52 fps Min Velocity: 3.34 fps 8 Avg Flow: 0.037 mgd Peak Flow 4 8 : 0.084 mgd Min Flow: 0.014 mgd MH 29
Level, Velocity and Flow Monitoring Site:

From 4/20/2009 to 4/27/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 4/20 4/21 4/22 4/23 4/24 4/25 4/26
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.52 in. Peak Level: 0.74 in. Min Level: 0.39 in. 8 Avg Velocity: 5.9 fps Peak Velocity: 8.02 fps Min Velocity: 3.56 fps 8 Avg Flow: 0.038 mgd Peak Flow 5 8 : 0.081 mgd Min Flow: 0.021 mgd Monitoring Site:

Location:

Size/Type Line:

MH 33
Canwwod Street, east of Strawberry Hill Drive
8-inch Sanitary Sewer Pipe
Temporary Flow Monitoring Study
Sanitary Sewer Collection System
Data Summary Report
MH 33
Location: Canwwod Street, east of Strawberry
Hill Drive
Diameter: 8 inches
Site Information Monitoring Site:

Report
Average Dry Weather Flow: 0.09
Peak Measured Flow: 0.24
mgd
mgd
Flow Sketch
Street View Photo
Satellite Map
Sanitary Map
Plan View Photo
MH 33
Site Information Report Monitoring Site:

Photos
Manhole Lid
East Inlet
MH 33
Site Information Report Monitoring Site:

Photos
North Inlet
West Inlet
MH 33
Site Information Report Monitoring Site:

Photos
South Outlet

0.00 0.050.100.150.200.250.300.350.40
24-Mar
Tue
25-Mar
Wed
26-Mar
Thu
27-Mar
Fri
28-Mar
Sat
29-Mar
Sun
30-Mar
Mon
31-Mar
Tue
1-Apr
Wed
2-Apr
Thu
3-Apr
Fri
4-Apr
Sat
5-Apr
Sun
6-Apr
Mon
7-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)
Rain Flow BLFlow
MH 33
Period Flow Summary Monitoring Site:

0.081

0.084

0.072

0.074

0.086

0.088

0.085

0.098

0.097

0.092

0.100

0.091

0.093

0.090

0.084

0.085

0.084

0.083

0.082

0.000.020.040.060.080.100.12
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20
Flow (MGal)

0.00.40.81.21.62.02.42.8 Rainfall (in/day)

0.000.050.100.150.200.250.300.350.40
7-Apr
Tue
8-Apr
Wed
9-Apr
Thu
10-Apr
Fri
11-Apr
Sat
12-Apr
Sun
13-Apr
Mon
14-Apr
Tue
15-Apr
Wed
16-Apr
Thu
17-Apr
Fri
18-Apr
Sat
19-Apr
Sun
20-Apr
Mon
21-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)

0.077

0.088

0.093

0.108

0.096

0.098

0.077

0.090

0.000.020.040.060.080.100.12
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.4 0.00 2.80.020.040.060.080.100.12
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.42.8 March 24, 2009 to April 21, 2009 Total Monthly Rainfall: 0.07 inches Avg Flow: 0.09 mgd Peak Flow: 0.24 mgd Min Flow: 0 mgd MH 33
Monitoring Site: Average Dry Weather Flow
29 %
17 %
Peak Measured Flow:

0.24 mgd
Average Dry Weather Flow:

0.09 mgd

0.000.020.040.060.080.100.120.140.16
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Flow (mgd)
WeekdayWeekend
Peak measured flow shown in weekly
graphs on following pages
MH 33
Level, Velocity and Flow Monitoring Site:

From 3/23/2009 to 3/30/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 9.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 3/23 3/24 3/25 3/26 3/27 3/28 3/29
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.3 in. Peak Level: 1.9 in. Min Level: 0.73 in. 2 Avg Velocity: 3.14 fps Peak Velocity: 4.76 fps Min Velocity: 0.61 fps 2 Avg Flow: 0.079 mgd Peak Flow 2 : 0.196 mgd Min Flow: 0.007 mgd MH 33
Level, Velocity and Flow Monitoring Site:

From 3/30/2009 to 4/6/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 9.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 3/30 3/31 4/1 4/2 4/3 4/4 4/5
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.44 in. Peak Level: 2.3 in. Min Level: 0.84 in. 2 Avg Velocity: 3.08 fps Peak Velocity: 4.62 fps Min Velocity: 0.69 fps 2 Avg Flow: 0.092 mgd Peak Flow 2 2 : 0.236 mgd Min Flow: 0.01 mgd MH 33
Level, Velocity and Flow Monitoring Site:

From 4/6/2009 to 4/13/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 9.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 4/6 4/7 4/8 4/9 4/10 4/11 4/12
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.43 in. Peak Level: 2 in. Min Level: 0.82 in. 2 Avg Velocity: 3.27 fps Peak Velocity: 4.66 fps Min Velocity: 0.58 fps 2 Avg Flow: 0.095 mgd Peak Flow 3 2 : 0.201 mgd Min Flow: 0.007 mgd MH 33
Level, Velocity and Flow Monitoring Site:

From 4/13/2009 to 4/20/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 9.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 4/13 4/14 4/15 4/16 4/17 4/18 4/19
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.34 in. Peak Level: 1.81 in. Min Level: 0.68 in. 2 Avg Velocity: 3.18 fps Peak Velocity: 4.47 fps Min Velocity: 0.41 fps 2 Avg Flow: 0.085 mgd Peak Flow: 0.17 mgd Min Flow: 0.004 mgd 4 2 MH 33
Level, Velocity and Flow Monitoring Site:

From 4/20/2009 to 4/27/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 9.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 4/20 4/21 4/22 4/23 4/24 4/25 4/26
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.32 in. Peak Level: 1.69 in. Min Level: 0.96 in. 2 Avg Velocity: 3.18 fps Peak Velocity: 4.53 fps Min Velocity: 1.27 fps 2 Avg Flow: 0.082 mgd Peak Flow 5 2 : 0.157 mgd Min Flow: 0.02 mgd Monitoring Site:

Location:

Size/Type Line:

MH 42
Rustling Oaks Drive, south of Laro Drive
12-inch Sanitary Sewer Pipe
Temporary Flow Monitoring Study
Sanitary Sewer Collection System
Data Summary Report
MH 42
Location: Rustling Oaks Drive, south of Laro
Drive
Diameter: 12 inches
Site Information Monitoring Site:

Report
Average Dry Weather Flow: 0.18
Peak Measured Flow: 0.41
mgd
mgd
Flow Sketch
Street View Photo
Satellite Map
Sanitary Map
Plan View Photo
MH 42
Site Information Report Monitoring Site:

Photos
Manhole Lid
North Inlet
MH 42
Site Information Report Monitoring Site:

Photos
South Outlet

0.00 0.100.200.300.400.500.600.70
24-Mar
Tue
25-Mar
Wed
26-Mar
Thu
27-Mar
Fri
28-Mar
Sat
29-Mar
Sun
30-Mar
Mon
31-Mar
Tue
1-Apr
Wed
2-Apr
Thu
3-Apr
Fri
4-Apr
Sat
5-Apr
Sun
6-Apr
Mon
7-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)
Rain Flow BLFlow
MH 42
Period Flow Summary Monitoring Site:

0.192

0.179

0.190

0.203

0.195

0.194

0.192

0.167

0.162

0.182

0.200

0.194

0.189

0.188

0.177

0.179

0.184

0.207

0.000.050.100.150.200.25
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20
Flow (MGal)

0.00.40.81.21.62.02.42.8 Rainfall (in/day)

0.000.100.200.300.400.500.600.70
7-Apr
Tue
8-Apr
Wed
9-Apr
Thu
10-Apr
Fri
11-Apr
Sat
12-Apr
Sun
13-Apr
Mon
14-Apr
Tue
15-Apr
Wed
16-Apr
Thu
17-Apr
Fri
18-Apr
Sat
19-Apr
Sun
20-Apr
Mon
21-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)

0.188

0.208

0.183

0.187

0.182

0.189

0.179

0.196

0.000.050.100.150.200.25
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.4 0.00 2.80.050.100.150.200.25
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.42.8 March 24, 2009 to April 21, 2009 Total Monthly Rainfall: 0.07 inches Avg Flow: 0.19 mgd Peak Flow: 0.41 mgd Min Flow: 0.04 mgd MH 42
Monitoring Site: Average Dry Weather Flow
24 %
16 %
Peak Measured Flow:

0.41 mgd
Average Dry Weather Flow:

0.18 mgd

0.000.050.100.150.200.250.300.35
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Flow (mgd)
WeekdayWeekend
Peak measured flow shown in weekly
graphs on following pages
MH 42
Level, Velocity and Flow Monitoring Site:

From 3/23/2009 to 3/30/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 0.70
3/23 3/24 3/25 3/26 3/27 3/28 3/29
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.95 in. Peak Level: 2.73 in. Min Level: 1.5 in. 9 Avg Velocity: 3.39 fps Peak Velocity: 4.64 fps Min Velocity: 1.32 fps 9 Avg Flow: 0.189 mgd Peak Flow 9 : 0.367 mgd Min Flow: 0.05 mgd MH 42
Level, Velocity and Flow Monitoring Site:

From 3/30/2009 to 4/6/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 0.70
3/30 3/31 4/1 4/2 4/3 4/4 4/5
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2 in. Peak Level: 2.88 in. Min Level: 1.32 in. 9 Avg Velocity: 3.28 fps Peak Velocity: 4.63 fps Min Velocity: 1.23 fps 9 Avg Flow: 0.193 mgd Peak Flow 2 9 : 0.406 mgd Min Flow: 0.039 mgd MH 42
Level, Velocity and Flow Monitoring Site:

From 4/6/2009 to 4/13/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 0.70
4/6 4/7 4/8 4/9 4/10 4/11 4/12
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.92 in. Peak Level: 2.64 in. Min Level: 1.29 in. 9 Avg Velocity: 3.32 fps Peak Velocity: 4.58 fps Min Velocity: 1.09 fps 9 Avg Flow: 0.182 mgd Peak Flow 3 9 : 0.364 mgd Min Flow: 0.038 mgd MH 42
Level, Velocity and Flow Monitoring Site:

From 4/13/2009 to 4/20/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 0.70
4/13 4/14 4/15 4/16 4/17 4/18 4/19
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.95 in. Peak Level: 2.55 in. Min Level: 1.43 in. 9 Avg Velocity: 3.31 fps Peak Velocity: 4.43 fps Min Velocity: 1.33 fps 9 Avg Flow: 0.185 mgd Peak Flow 4 9 : 0.349 mgd Min Flow: 0.047 mgd MH 42
Level, Velocity and Flow Monitoring Site:

From 4/20/2009 to 4/27/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 0.70
4/20 4/21 4/22 4/23 4/24 4/25 4/26
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.08 in. Peak Level: 2.68 in. Min Level: 1.49 in. 9 Avg Velocity: 3.33 fps Peak Velocity: 4.68 fps Min Velocity: 1.4 fps 9 Avg Flow: 0.207 mgd Peak Flow 5 9 : 0.392 mgd Min Flow: 0.051 mgd Monitoring Site:

Location:

Size/Type Line:

MH 84
Park Vista Road and Patrick Henry Place
8-inch Sanitary Sewer Pipe
Temporary Flow Monitoring Study
Sanitary Sewer Collection System
Data Summary Report
MH 84
Location: Park Vista Road and Patrick Henry
Place
Diameter: 8 inches
Site Information Monitoring Site:

Report
Average Dry Weather Flow: 0.01
Peak Measured Flow: 0.04
mgd
mgd
Flow Sketch
Street View Photo
Satellite Map
Sanitary Map
Plan View Photo
MH 84
Site Information Report Monitoring Site:

Photos
Manhole Lid
East Inlet
MH 84
Site Information Report Monitoring Site:

Photos
North Inlet
South Inlet
MH 84
Site Information Report Monitoring Site:

Photos
West Outlet

0.00 0.010.010.020.020.030.030.040.040.050.05
24-Mar
Tue
25-Mar
Wed
26-Mar
Thu
27-Mar
Fri
28-Mar
Sat
29-Mar
Sun
30-Mar
Mon
31-Mar
Tue
1-Apr
Wed
2-Apr
Thu
3-Apr
Fri
4-Apr
Sat
5-Apr
Sun
6-Apr
Mon
7-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)
Rain Flow BLFlow
MH 84
Period Flow Summary Monitoring Site:

0.008

0.009

0.008

0.007

0.006

0.007

0.006

0.007

0.006

0.007

0.009

0.007

0.005

0.004

0.005

0.006

0.000.000.000.010.010.01
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20
Flow (MGal)

0.00.40.81.21.62.02.42.8 Rainfall (in/day)

0.000.010.010.020.020.030.030.040.040.050.05
7-Apr
Tue
8-Apr
Wed
9-Apr
Thu
10-Apr
Fri
11-Apr
Sat
12-Apr
Sun
13-Apr
Mon
14-Apr
Tue
15-Apr
Wed
16-Apr
Thu
17-Apr
Fri
18-Apr
Sat
19-Apr
Sun
20-Apr
Mon
21-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)

0.007

0.009

0.006

0.007

0.008

0.006

0.000.000.000.010.010.01
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.4 0.00 2.80.000.000.010.010.01
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.42.8 March 24, 2009 to April 21, 2009 Total Monthly Rainfall: 0.07 inches Avg Flow: 0.01 mgd Peak Flow: 0.04 mgd Min Flow: 0 mgd MH 84
Monitoring Site: Average Dry Weather Flow
13 %
5%
Peak Measured Flow:

0.04 mgd
Average Dry Weather Flow:

0.01 mgd

0.000.000.000.010.010.010.010.01
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Flow (mgd)
WeekdayWeekend
Peak measured flow shown in weekly
graphs on following pages
MH 84
Level, Velocity and Flow Monitoring Site:

From 3/23/2009 to 3/30/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.01

0.01 0.02

0.02 0.03

0.03 0.04

0.04 0.05

0.05 3/23 3/24 3/25 3/26 3/27 3/28 3/29
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.43 in. Peak Level: 0.85 in. Min Level: 0.06 in. 4 Avg Velocity: 1.62 fps Peak Velocity: 3.02 fps Min Velocity: 0.69 fps 4 Avg Flow: 0.008 mgd Peak Flow 4 : 0.033 mgd Min Flow: 0 mgd MH 84
Level, Velocity and Flow Monitoring Site:

From 3/30/2009 to 4/6/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.01

0.01 0.02

0.02 0.03

0.03 0.04

0.04 0.05

0.05 3/30 3/31 4/1 4/2 4/3 4/4 4/5
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.38 in. Peak Level: 0.87 in. Min Level: 0.1 in. 4 Avg Velocity: 1.41 fps Peak Velocity: 2.97 fps Min Velocity: 0.53 fps 4 Avg Flow: 0.006 mgd Peak Flow 2 4 : 0.036 mgd Min Flow: 0 mgd MH 84
Level, Velocity and Flow Monitoring Site:

From 4/6/2009 to 4/13/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.01

0.01 0.02

0.02 0.03

0.03 0.04

0.04 0.05

0.05 4/6 4/7 4/8 4/9 4/10 4/11 4/12
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.41 in. Peak Level: 1 in. Min Level: 0.05 in. 4 Avg Velocity: 1.45 fps Peak Velocity: 3.25 fps Min Velocity: 0.26 fps 4 Avg Flow: 0.007 mgd Peak Flow 3 4 : 0.043 mgd Min Flow: 0 mgd MH 84
Level, Velocity and Flow Monitoring Site:

From 4/13/2009 to 4/20/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.01

0.01 0.02

0.02 0.03

0.03 0.04

0.04 0.05

0.05 4/13 4/14 4/15 4/16 4/17 4/18 4/19
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.35 in. Peak Level: 0.9 in. Min Level: 0.07 in. 4 Avg Velocity: 1.3 fps Peak Velocity: 2.25 fps Min Velocity: 0.43 fps 4 Avg Flow: 0.005 mgd Peak Flow 4 4 : 0.031 mgd Min Flow: 0 mgd MH 84
Level, Velocity and Flow Monitoring Site:

From 4/20/2009 to 4/27/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.01

0.01 0.02

0.02 0.03

0.03 0.04

0.04 0.05

0.05 4/20 4/21 4/22 4/23 4/24 4/25 4/26
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.36 in. Peak Level: 0.78 in. Min Level: 0.09 in. 4 Avg Velocity: 1.38 fps Peak Velocity: 2.29 fps Min Velocity: 0.78 fps 4 Avg Flow: 0.006 mgd Peak Flow 5 4 : 0.026 mgd Min Flow: 0.001 mgd Monitoring Site:

Location:

Size/Type Line:

MH 85
Dargan Street, west of Acadia Avenue
10-inch Sanitary Sewer Pipe
Temporary Flow Monitoring Study
Sanitary Sewer Collection System
Data Summary Report
MH 85
Location: Dargan Street, west of Acadia Avenue
Diameter: 10 inches
Site Information Monitoring Site:

Report
Average Dry Weather Flow: 0.06
Peak Measured Flow: 0.15
mgd
mgd
Flow Sketch
Street View Photo
Satellite Map
Sanitary Map
Plan View Photo
MH 85
Site Information Report Monitoring Site:

Photos
Manhole Lid
East Inlet
MH 85
Site Information Report Monitoring Site:

Photos
West Outlet

0.00 0.020.040.060.080.100.120.140.160.180.20
24-Mar
Tue
25-Mar
Wed
26-Mar
Thu
27-Mar
Fri
28-Mar
Sat
29-Mar
Sun
30-Mar
Mon
31-Mar
Tue
1-Apr
Wed
2-Apr
Thu
3-Apr
Fri
4-Apr
Sat
5-Apr
Sun
6-Apr
Mon
7-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)
Rain Flow BLFlow
MH 85
Period Flow Summary Monitoring Site:

0.058

0.054

0.057

0.063

0.058

0.059

0.060

0.062

0.061

0.064

0.063

0.064

0.055

0.051

0.050

0.049

0.052

0.062

0.000.010.020.030.040.050.060.07
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20
Flow (MGal)

0.00.40.81.21.62.02.42.8 Rainfall (in/day)

0.000.020.040.060.080.100.120.140.160.180.20
7-Apr
Tue
8-Apr
Wed
9-Apr
Thu
10-Apr
Fri
11-Apr
Sat
12-Apr
Sun
13-Apr
Mon
14-Apr
Tue
15-Apr
Wed
16-Apr
Thu
17-Apr
Fri
18-Apr
Sat
19-Apr
Sun
20-Apr
Mon
21-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)

0.061

0.065

0.063

0.064

0.053

0.061

0.000.010.020.030.040.050.060.07
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.4 0.00 2.80.010.020.030.040.050.060.07 3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.42.8 March 24, 2009 to April 21, 2009 Total Monthly Rainfall: 0.07 inches Avg Flow: 0.06 mgd Peak Flow: 0.15 mgd Min Flow: 0.01 mgd MH 85
Monitoring Site: Average Dry Weather Flow
33 %
22 %
Peak Measured Flow:

0.15 mgd
Average Dry Weather Flow:

0.06 mgd

0.000.020.040.060.080.100.120.14
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Flow (mgd)
WeekdayWeekend
Peak measured flow shown in weekly
graphs on following pages
MH 85
Level, Velocity and Flow Monitoring Site:

From 3/23/2009 to 3/30/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 0.5

1.0 1.5

2.0 2.5

3.0 Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 0.18

0.20 3/23 3/24 3/25 3/26 3/27 3/28 3/29
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.14 in. Peak Level: 3.08 in. Min Level: 1.28 in. 6 Avg Velocity: 0.99 fps Peak Velocity: 1.49 fps Min Velocity: 0.58 fps 6 Avg Flow: 0.059 mgd Peak Flow 6 : 0.134 mgd Min Flow: 0.016 mgd MH 85
Level, Velocity and Flow Monitoring Site:

From 3/30/2009 to 4/6/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 0.5

1.0 1.5

2.0 2.5

3.0 Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 0.18

0.20 3/30 3/31 4/1 4/2 4/3 4/4 4/5
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.23 in. Peak Level: 3.31 in. Min Level: 1.4 in. 6 Avg Velocity: 0.98 fps Peak Velocity: 1.43 fps Min Velocity: 0.54 fps 6 Avg Flow: 0.062 mgd Peak Flow 2 6 : 0.146 mgd Min Flow: 0.017 mgd MH 85
Level, Velocity and Flow Monitoring Site:

From 4/6/2009 to 4/13/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 0.5

1.0 1.5

2.0 2.5

3.0 Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 0.18

0.20 4/6 4/7 4/8 4/9 4/10 4/11 4/12
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.28 in. Peak Level: 3.19 in. Min Level: 1.4 in. 6 Avg Velocity: 0.98 fps Peak Velocity: 1.39 fps Min Velocity: 0.54 fps 6 Avg Flow: 0.063 mgd Peak Flow 3 6 : 0.131 mgd Min Flow: 0.016 mgd MH 85
Level, Velocity and Flow Monitoring Site:

From 4/13/2009 to 4/20/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 0.5

1.0 1.5

2.0 2.5

3.0 Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 0.18

0.20 4/13 4/14 4/15 4/16 4/17 4/18 4/19
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.09 in. Peak Level: 2.85 in. Min Level: 1.25 in. 6 Avg Velocity: 0.93 fps Peak Velocity: 1.33 fps Min Velocity: 0.48 fps 6 Avg Flow: 0.053 mgd Peak Flow 4 6 : 0.108 mgd Min Flow: 0.013 mgd MH 85
Level, Velocity and Flow Monitoring Site:

From 4/20/2009 to 4/27/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 0.5

1.0 1.5

2.0 2.5

3.0 Velocity (fps)
Vel

0.00 0.02

0.04 0.06

0.08 0.10

0.12 0.14

0.16 0.18

0.20 4/20 4/21 4/22 4/23 4/24 4/25 4/26
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.27 in. Peak Level: 3.12 in. Min Level: 1.35 in. 6 Avg Velocity: 0.95 fps Peak Velocity: 1.4 fps Min Velocity: 0.46 fps 6 Avg Flow: 0.062 mgd Peak Flow 5 6 : 0.131 mgd Min Flow: 0.013 mgd Monitoring Site:

Location:

Size/Type Line:

MH 178
Rainbow View Drive and Wheelhouse Lane
8-inch Sanitary Sewer Pipe
Temporary Flow Monitoring Study
Sanitary Sewer Collection System
Data Summary Report
MH 178
Location: Rainbow View Drive and Wheelhouse
Lane
Diameter: 8 inches
Site Information Monitoring Site:

Report
Average Dry Weather Flow: 0.09
Peak Measured Flow: 0.27
mgd
mgd
Flow Sketch
Street View Photo
Satellite Map
Sanitary Map
Plan View Photo
MH 178
Site Information Report Monitoring Site:

Photos
East Inlet
North Inlet
MH 178
Site Information Report Monitoring Site:

Photos
West Outlet

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)
Rain Flow BLFlow
MH 178
Period Flow Summary Monitoring Site:

0.101

0.099

0.096

0.088

0.087

0.086

0.092

0.082

0.077

0.092

0.086

0.088

0.085

0.079

0.088

0.089

0.094

0.088

0.080

0.090

0.000.020.040.060.080.100.12
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20
Flow (MGal)

0.00.40.81.21.62.02.42.8 Rainfall (in/day)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)

0.084

0.089

0.082

0.087

0.091

0.083

0.091

0.000.020.040.060.080.100.12
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.4 0.00 2.80.020.040.060.080.100.12
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.42.8 March 24, 2009 to April 21, 2009 Total Monthly Rainfall: 0.07 inches Avg Flow: 0.09 mgd Peak Flow: 0.27 mgd Min Flow: 0.03 mgd MH 178
Monitoring Site: Average Dry Weather Flow
43 %
25 %
Peak Measured Flow:

0.27 mgd
Average Dry Weather Flow:

0.09 mgd

From 3/23/2009 to 3/30/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 3/23 3/24 3/25 3/26 3/27 3/28 3/29
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.15 in. Peak Level: 3.47 in. Min Level: 1.41 in.

Avg Velocity: 1.85 fps Peak Velocity: 2.86 fps Min Velocity: 0.95 fps Avg Flow: 0.093 mgd Peak Flow: 0.268 mgd Min Flow: 0.031 mgd MH 178
Level, Velocity and Flow Monitoring Site:

From 3/30/2009 to 4/6/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 3/30 3/31 4/1 4/2 4/3 4/4 4/5
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.98 in. Peak Level: 3.01 in. Min Level: 1.21 in.

Avg Velocity: 1.89 fps Peak Velocity: 2.59 fps Min Velocity: 1.18 fps Avg Flow: 0.085 mgd Peak Flow 2 : 0.185 mgd Min Flow: 0.03 mgd MH 178
Level, Velocity and Flow Monitoring Site:

From 4/6/2009 to 4/13/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 4/6 4/7 4/8 4/9 4/10 4/11 4/12
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.96 in. Peak Level: 2.97 in. Min Level: 1.33 in.

Avg Velocity: 1.97 fps Peak Velocity: 2.68 fps Min Velocity: 1.24 fps Avg Flow: 0.087 mgd Peak Flow 3 : 0.176 mgd Min Flow: 0.034 mgd MH 178
Level, Velocity and Flow Monitoring Site:

From 4/13/2009 to 4/20/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 4/13 4/14 4/15 4/16 4/17 4/18 4/19
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.02 in. Peak Level: 2.97 in. Min Level: 1.4 in.

Avg Velocity: 1.91 fps Peak Velocity: 2.59 fps Min Velocity: 1.16 fps Avg Flow: 0.088 mgd Peak Flow 4 : 0.164 mgd Min Flow: 0.032 mgd MH 178
Level, Velocity and Flow Monitoring Site:

From 4/20/2009 to 4/27/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 4/20 4/21 4/22 4/23 4/24 4/25 4/26
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2 in. Peak Level: 2.63 in. Min Level: 1.49 in.

Avg Velocity: 1.99 fps Peak Velocity: 2.83 fps Min Velocity: 1.23 fps Avg Flow: 0.09 mgd Peak Flow: 0.165 mgd Min Flow: 0.041 mgd 5 Monitoring Site:

Location:

Size/Type Line:

MH 203
Thousand Oaks Boulevard, west of Kanan Road
8-inch Sanitary Sewer Pipe
Temporary Flow Monitoring Study
Sanitary Sewer Collection System
Data Summary Report
MH 203
Location: Thousand Oaks Boulevard, west of
Kanan Road
Diameter: 8 inches
Site Information Monitoring Site:

Report
Average Dry Weather Flow: 0.09
Peak Measured Flow: 0.20
mgd
mgd
Flow Sketch
Street View Photo
Satellite Map
Sanitary Map
Plan View Photo
MH 203
Site Information Report Monitoring Site:

Photos
Manhole Lid
East Inlet
MH 203
Site Information Report Monitoring Site:

Photos
North Inlet
West Inlet
MH 203
Site Information Report Monitoring Site:

Photos
South Outlet

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)
Rain Flow BLFlow
MH 203
Period Flow Summary Monitoring Site:

0.085

0.090

0.088

0.097

0.096

0.093

0.098

0.101

0.097

0.099

0.083

0.090

0.085

0.097

0.089

0.085

0.088

0.094

0.088

0.089

0.000.020.040.060.080.100.12
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20
Flow (MGal)

0.00.40.81.21.62.02.42.8 Rainfall (in/day)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)

0.095

0.103

0.084

0.086

0.099

0.096

0.079

0.086

0.000.020.040.060.080.100.12
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.4 0.00 2.80.020.040.060.080.100.12
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.42.8 March 24, 2009 to April 21, 2009 Total Monthly Rainfall: 0.07 inches Avg Flow: 0.09 mgd Peak Flow: 0.2 mgd Min Flow: 0.03 mgd MH 203
Monitoring Site: Average Dry Weather Flow
17 %
11 %
Peak Measured Flow:

0.20 mgd
Average Dry Weather Flow:

0.09 mgd

From 3/23/2009 to 3/30/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 3/23 3/24 3/25 3/26 3/27 3/28 3/29
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.91 in. Peak Level: 1.37 in. Min Level: 0.55 in. 3 Avg Velocity: 6.19 fps Peak Velocity: 8.63 fps Min Velocity: 3.89 fps 3 Avg Flow: 0.093 mgd Peak Flow 3 : 0.202 mgd Min Flow: 0.026 mgd MH 203
Level, Velocity and Flow Monitoring Site:

From 3/30/2009 to 4/6/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 3/30 3/31 4/1 4/2 4/3 4/4 4/5
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.92 in. Peak Level: 1.23 in. Min Level: 0.6 in. 3 Avg Velocity: 6.22 fps Peak Velocity: 8.91 fps Min Velocity: 3.9 fps 3 Avg Flow: 0.094 mgd Peak Flow 2 3 : 0.181 mgd Min Flow: 0.031 mgd MH 203
Level, Velocity and Flow Monitoring Site:

From 4/6/2009 to 4/13/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 4/6 4/7 4/8 4/9 4/10 4/11 4/12
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.92 in. Peak Level: 1.31 in. Min Level: 0.62 in. 3 Avg Velocity: 6.24 fps Peak Velocity: 8.83 fps Min Velocity: 4 fps 3 Avg Flow: 0.093 mgd Peak Flow 3 3 : 0.196 mgd Min Flow: 0.034 mgd MH 203
Level, Velocity and Flow Monitoring Site:

From 4/13/2009 to 4/20/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 4/13 4/14 4/15 4/16 4/17 4/18 4/19
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.9 in. Peak Level: 1.21 in. Min Level: 0.64 in. 3 Avg Velocity: 6.07 fps Peak Velocity: 8.17 fps Min Velocity: 3.73 fps 3 Avg Flow: 0.087 mgd Peak Flow 4 3 : 0.171 mgd Min Flow: 0.032 mgd MH 203
Level, Velocity and Flow Monitoring Site:

From 4/20/2009 to 4/27/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
Velocity (fps)
Vel

0.00 0.05

0.10 0.15

0.20 0.25

0.30 0.35

0.40 4/20 4/21 4/22 4/23 4/24 4/25 4/26
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 0.91 in. Peak Level: 1.02 in. Min Level: 0.71 in. 3 Avg Velocity: 6.15 fps Peak Velocity: 8.36 fps Min Velocity: 4.24 fps 3 Avg Flow: 0.089 mgd Peak Flow: 0.14 mgd Min Flow: 0.042 mgd 5 3 Monitoring Site:

Location:

Size/Type Line:

MH 259
Chumash Park near Medea Valley Drive
8-inch Sanitary Sewer Pipe
Temporary Flow Monitoring Study
Sanitary Sewer Collection System
Data Summary Report
MH 259
Location: Chumash Park near Medea Valley Drive
Diameter: 8 inches
Site Information Monitoring Site:

Report
Average Dry Weather Flow: 0.14
Peak Measured Flow: 0.35
mgd
mgd
Flow Sketch
Street View Photo
Satellite Map
Sanitary Map
Plan View Photo
MH 259
Site Information Report Monitoring Site:

Photos
East Inlet
South Inlet
MH 259
Site Information Report Monitoring Site:

Photos
West Outlet

0.00 0.100.200.300.400.500.60
24-Mar
Tue
25-Mar
Wed
26-Mar
Thu
27-Mar
Fri
28-Mar
Sat
29-Mar
Sun
30-Mar
Mon
31-Mar
Tue
1-Apr
Wed
2-Apr
Thu
3-Apr
Fri
4-Apr
Sat
5-Apr
Sun
6-Apr
Mon
7-Apr
Tue
Flow (mgd)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)
Rain Flow BLFlow
MH 259
Period Flow Summary Monitoring Site:

0.132

0.143

0.145

0.130

0.138

0.131

0.140

0.142

0.138

0.140

0.144

0.147

0.152

0.144

0.149

0.153

0.151

0.136

0.124

0.146

0.000.020.040.060.080.100.120.140.160.18
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20
Flow (MGal)

0.00.40.81.21.62.02.42.8 Rainfall (in/day)

0.000.050.100.150.200.250.300.350.40
Rainfall (in/hr)

0.146

0.139

0.135

0.145

0.154

0.127

0.135

0.000.020.040.060.080.100.120.140.160.18
3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.4 0.00 2.80.020.040.060.080.100.120.140.160.18 3/24
3/25
3/26
3/27
3/28
3/29
3/30
3/31
4/1
4/2
4/3
4/4
4/5
4/6
4/7
4/8
4/9
4/10
4/11
4/12
4/13
4/14
4/15
4/16
4/17
4/18
4/19
4/20

0.00.40.81.21.62.02.42.8 March 24, 2009 to April 21, 2009 Total Monthly Rainfall: 0.07 inches Avg Flow: 0.14 mgd Peak Flow: 0.35 mgd Min Flow: 0.03 mgd MH 259
Monitoring Site: Average Dry Weather Flow
41 %
25 %
Peak Measured Flow:

0.35 mgd
Average Dry Weather Flow:

0.14 mgd

0.000.050.100.150.200.250.30
0:00
1:00
2:00
3:00
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Flow (mgd)
WeekdayWeekend
Peak measured flow shown in weekly
graphs on following pages
MH 259
Level, Velocity and Flow Monitoring Site:

From 3/23/2009 to 3/30/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 3/23 3/24 3/25 3/26 3/27 3/28 3/29
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.98 in. Peak Level: 2.6 in. Min Level: 1.31 in. 7 Avg Velocity: 3.11 fps Peak Velocity: 4.75 fps Min Velocity: 1.82 fps 7 Avg Flow: 0.139 mgd Peak Flow 7 : 0.276 mgd Min Flow: 0.045 mgd MH 259
Level, Velocity and Flow Monitoring Site:

From 3/30/2009 to 4/6/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 3/30 3/31 4/1 4/2 4/3 4/4 4/5
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 1.94 in. Peak Level: 2.77 in. Min Level: 0.99 in. 7 Avg Velocity: 3.1 fps Peak Velocity: 4.53 fps Min Velocity: 1.77 fps 7 Avg Flow: 0.137 mgd Peak Flow 2 7 : 0.295 mgd Min Flow: 0.033 mgd MH 259
Level, Velocity and Flow Monitoring Site:

From 4/6/2009 to 4/13/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 4/6 4/7 4/8 4/9 4/10 4/11 4/12
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.03 in. Peak Level: 3.11 in. Min Level: 1.26 in. 7 Avg Velocity: 3.15 fps Peak Velocity: 4.75 fps Min Velocity: 1.78 fps 7 Avg Flow: 0.147 mgd Peak Flow 3 7 : 0.307 mgd Min Flow: 0.049 mgd MH 259
Level, Velocity and Flow Monitoring Site:

From 4/13/2009 to 4/20/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 4/13 4/14 4/15 4/16 4/17 4/18 4/19
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.02 in. Peak Level: 3.28 in. Min Level: 1.25 in. 7 Avg Velocity: 3 fps Peak Velocity: 4.62 fps Min Velocity: 1.79 fps 7 Avg Flow: 0.139 mgd Peak Flow 4 7 : 0.352 mgd Min Flow: 0.044 mgd MH 259
Level, Velocity and Flow Monitoring Site:

From 4/20/2009 to 4/27/2009

0.0 0.5

1.0 1.5

2.0 2.5

3.0 3.5

4.0 4.5

5.0 Mon Tue Wed Thu Fri Sat Sun
Level (in)
Lev

0.0 1.0

2.0 3.0

4.0 5.0

6.0 7.0
Velocity (fps)
Vel

0.00 0.10

0.20 0.30

0.40 0.50

0.60 4/20 4/21 4/22 4/23 4/24 4/25 4/26
Flow (mgd)

0.0 0.1

0.2 0.3

0.4 0.5

0.6 0.7

0.8 Rain (in/hr)
Rain Flow BLFlow
Avg Level: 2.01 in. Peak Level: 2.82 in. Min Level: 1.2 in. 7 Avg Velocity: 3.08 fps Peak Velocity: 4.33 fps Min Velocity: 2 fps 7 Avg Flow: 0.146 mgd Peak Flow 5 7 : 0.306 mgd Min Flow: 0.048 mgd MH 178
MH 33
MH 203
MH 84
MH 25
MH 85
MH 259
MH 29
MH 42 MH 178
MH 33
MH 203
MH 84
MH 25
MH 85
MH 259
MH 29
MH 42
Oakland
1999 Harrison Street, Suite 975
Oakland, CA 94612
510.903.6600 Tel
510.903.6601 Fax
San Diego
8291 Aero Place, Suite 110
San Diego, CA 92123
858.576.0226 Tel
858.576.0004 Fax
Houston
One Riverway, Suite 1700
Houston, TX 77056
713.840.6490 Tel
713.840.6491 Fax
Seattle
14900 Interurban Avenue, Suite 268
Seattle, WA 96818
206.674.4560 Tel
206.674.4561 Fax
vaengineering.com
Appendix ‘L’
APPENDIX ‘L-5’
City Land Use Designations Map
B
B
B
B
B
B
B
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B B
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B B
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B B
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B B
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B B
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BB
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B B
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B B
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B B
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BB
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B B
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B B
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B B
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B B
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BB B
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!F"
")E ")J
")E
")E
")H
Lindero Canyon
Road Rolling
R
eye
s
A
d
o
b
e
R
d
M
e
a
d
o
w
V
ist
a
Wy
Rainbow Crest Dr
Adobe Rd
Midd
le
C
r
e
s
t
D
r
Agoura Rd
Hillrise Dr
Quail Run Dr
Grey Rock
Rd
Fountainwood St. Timberlan
e
St.

Capricorn
Ave
Fairview
Pl
Argos St
Country Glen
Rd
Palo Comado Canyon
Thousand Oaks Bl
Bertrand Dr
Ridgeway Dr
Castlehill
Dr
Ventura Freeway
Laro Dr
Ka
n
a
n
Road E agleton St.

Carell Ave
Driver Ave
Ridge Dr
Cheeseboro
Canyon
Triunfo Canyon
Canwood St
Kanan
Rd
Kanan Road
L
e
w
i
s
R
d
Dorothy Dr
Fairview
Pl
Lewis Ln
Foothill Drive
Co
l
o
d
ny
Dr
Chesebro
Rd
Blythedale Rd
Agoura Rd
Lo s t Hills R d
L
ibe
rty
Cany
o
n
R
d
Woodbrook D r
Forest Cove Lane
View Dr
L
i
n
d
e
ro
D
r
Rainbow Lake
Reyes
Mainmast Dr
L
a
ke
Lindero
Dr
Santa Monica Mountains
National Recreation Area
Westlake Westlake
Village Village
Santa Monica Mountains
National Recreation Area

VENTURA VENTURA

COUNTY COUNTY

LOS ANGELES LOS ANGELES

COUNTY COUNTY

LLOOS AS ANNGGEELLEESS

CCOOUUNNTTYY
IÆ
IÆ
Land Use Designations
Ladyface Mountain
Specific Plan
Agoura Village
Specific Plan
Base Map Features
Santa Monica Mountains National Recreation Area
County Boundary
City BoundaryWater Courses
Trails and Fire Roads
!F" Trail Head/Parking
BB B B
")X Schools
General Plan Land Use
°N Last Updated: November 21, 2006 0 1,000 2,000 3,000 4,000Feet Rural Residential (RR)Very Low-Residential (<2 du/ac) (RV)Low Density-Residential (1-2 du/ac) (RL)Single Family-Residential (2-6 du/ac) (RS)Medium Density-Residential (6-15 du/ac) (RM)High Density-Residential (15-20 du/ac) (HDR)Commercial Shopping Center (CS)Commercial Retail/Service (CRS)Commerical Recreation (CR)Business Park Office Retail (BP-OR)Business Park-Manufacturing (BP-M)Public Facility (PF)Open Water (OW)Local Park (P)Restricted Open Space (OS/R)Open Space/Deed Restricted (OS/R/DR)Agoura Village Specific Plan (SP)Ladyface Specific Plan (SP) 1 2
3 4
5 6
7 8 9
10 11
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
24 23 25
26 27
28 29
30 31
32 33
34 35
36 37
1 2
3 4
5 1 2
3 4 5
1 2
3 4
5 1 2
3 4
5 6
7 8
9 1 2
3 4
5 1 2
3 4
5 1
2 3
4 5
6 7
8 9
10 11
12 13
1 2 3
4 5
6 7
8 9
10 11
12 13
14 15
16 17
18 19
20 21
22 23
24 25 26 27
28 29
30 31
32 33
34 35
36 37
38 39
40 41
42 43
44 45
46 47
48 49
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38 39
40 41
42 43
44 45 46
47 48
49 50
51 52
53 54
55 1
2 3
4 5
6 7
8 9
10 11
12 13
14 15
16 17
18 19
20 21
22 23
24 25
26 27
28 29
30 31
32 33
34 35
36 37 38
39 1 2
3 4
5 6
7 1 2
3 4
6 5
7 8
9 10 11 12
13 14
15 17 16
18 19
1 2
3 4 5
6 7
8 9
10 11 12
13 14
15 1
2 3
4 5
6 7
8 9
10 11 13
12 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
41 42
43 44
45 46
47 48
50 49
51 52
53 54
55 56
57 58
59 60
61 62
63 64
65 66
67 68
69 70
71 72
73 74
75 76
77 78
79 80
81 82
83 84
86 85
87 88
89 90
91 92
93 94
95 96
97 98
99 100
101
102
103
104
105
106
107
108
109
110
111
113 112
114
115
116
117
118
119
120
121
122
123
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127
128
129
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131
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133
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135
136
137
138
139
140
141
142
143
144
145
146 147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
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176
177
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180
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182
183
184 185
186
187
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189
190
191
192
193
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196 195
197
200 199 198
201
202
203
204
205
206
207
1 2
3 5 4
6 7
8 9
10 11
12 13
14 15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
41 42
43 44
45 46
47 48
49 50
51 52
53 54
55 56
57 58
59 60 61
62 63
64 65
66 67
68 69
70 71 72
73 74
75 76
77 78
79 80
81 82
83 84
85 86
87 88
89 90
91 92
93 94
95 96
97 98
99 100
101
102
103 104 105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 1
2 3 4
5 6
7 8
9 10
11 12
13 14
15 16
18 17
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 1
2 3
4 5
6 7
8 9
10 11
12 13
14 15 16
18 17
19 20
21 23 22
24 25
26 27
28 29 30
31 32
33 1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
41 42
43 44
45 46
47 48
49 50
51 52
53 54
55 56
57 58
59 60 61
62 63
64 65
66 67
68 69
70 71
72 73
74 75
76 77
79 78
80 81
82 83
84 85
86 87 88
89 90
91 92
93 94
95 96
97 98
99 100
101
102
103
104
105
106 107
108
109
110
111
112 113
114
115
116 117
118
119
120
121
122
123
124 126125
127 128
129
130
131 132
133
134
135
136
137
138
139
140
141
142 143
144
145
146
147
148
149
150
151
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153
154
155
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157
158
159
160
161
162
163
164
165
166
167
168 169
170
171
172
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180
181
182
183
184
185 186
187
188 189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
41 42
43 44
45 46
47 48
49 50
51 52
53 54
55 56
57 58
59 60
61 62
63 64
65 66
67 68
69 70
71 72
73 74
75 76
77 78
79 80
81 82
83 84
85 86
87 88
89 90
91 92
93 94
95 96
97 98
99 100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163 164
165
166
167
168
169 170
171
172
173 174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191 192
193
194
195
196
197
198
199
200
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202
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MATCHLINE - SEE LEFT

THIS AREA
ON

PRIVATE DISPOSAL SYSTEMS
SPLIT
(
(
(
( (
(
(
(
(
(
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(
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KANAN
AGOURA

ROADSIDE
CARELL

HILLRISE

COLODNY

FAIRVIEW
DRIVER
LEWIS
LARO

CANWOOD

KIMBERLY

CHESEBRO
LUIS

FOOTHILL

CALMFIELD
ACADIA
PISCES

CORNELL

DOVETAIL
ARIES

FOREST COVE

LAKE LINDERO

REYES ADOBE

FOUNTAINWOOD

THOUSAND OAKS

TIMBERLANE

RAINBOW VIEW

LAKEFRONT

BERTRAND

RIDGEBROOK

CONEJO VIEW

RAINBOW HILL

ALFONSO
ARGOS

GREY ROCK
VEJAR

WHEELHOUSE
RISTA

TRAILWAY

PASSAGEWAY

MIDDLE CREST

ROLLING RIDGE

MEADOW VISTA
QUEENS

SOFTWIND

WOODBROOK

TENNYSON

MAINMAST

LAKE CREST

LARBOARD

STONECREST

MICAELA

DOROTHY

OAKPATH

BARRAGANAQUARIUS

WOODGLEN

CANTERBURY

SLICERS

CAPRICORN

RIDGEWAY
JANLOR

FAIRGRANGE

LAURA LA PLANTE

HACKERS

DUNEGAL

IRONWOOD

BRIDLE GLEN

LAKE NADINE

LADYFACE
FERAL

MARLIES

ADELINA
RIGGER

QUAIL RUN

ACANTHUS
QUAINT

EAGLEBROOK

GERMANIA

WALFORD

VALLEY HEIGHTS
TULARE
TOTH

EMERSON

MACADAM

FAIRHAVEN
ALLMAN

AGOURA GLEN

BELMONT

PALO CAMADO
DARGAN
BEE
MISTY
WARING

FOUNTAIN

WOODBRIAR

BELSIZE

PALO COMADO

REYES ADOBE

CANWOOD
AGOURA

CANWOOD

QUAIL RUN
ACADIA

MICAELA

SOFTWIND

ROADSIDE

ROADSIDE
LEWIS

THOUSAND OAKS

CHESEBRO
KANAN

FOREST COVE

QUAIL RUN
AGOURA

CANWOOD

THOUSAND OAKS

DOVETAIL
LARO
ARGOS
AGOURA
AGOURA

GREY ROCK
AGOURA

CANWOOD

QUAIL RUN

CHESEBRO

PALO CAMADO

CORNELL

ROADSIDE
LEWIS
KANAN
RIGGER
DRIVER

OAKPATH
KANAN
KANAN

ROADSIDE
KANAN
LEWIS
AGOURA
AGOURA
AGOURA
KANAN

CANWOOD

FOOTHILL

MAINMAST
AGOURA
AGOURA

LAKE LINDERO

CORNELL

COLODNY
DRIVER

REYES ADOBE

CANWOOD
AGOURA

TRAILWAY
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EAGLETON

SHADYCREEK

LAKE LINDERO

RUSTLING OAKS

FOUNTAINWOOD

RAINBOW CREST

GREY ROCK

SANDTRAP

HEMPSTEAD

PASSAGEWAY

CASTLEHILL

TRAIL CREEK

CALABRIA

BUFFWOOD

OAKPATH

SAINT LAURENT

GREEN MEADOW
PENROD

STRAWBERY HILL

COLINA VISTA

MICHELLE

VIA AMISTOSA VIA AMISTOSA

FAIRGRANGE

DEEP SHADOW

WEEPING WILLOW

DAYLIGHT
MODENA

FENWORTH

MEDEA VALLEY MEDEA VALLEY

ALFREDO

CAPE HORN

HERITAGE

KINGHAM

JON DODSON JON DODSON

CEDARHAVEN CEDARHAVEN

WALNUT RIDGE

ACACIA GLEN

MEADOWMISTSILVER VALLEY

BARDELL

KERRYHILL
IMBLER

EASTERLY

CAREYBROOK

GARDEN OAKS

ROCK TREE

GOODSPRING

SUNNYRIDGE

OLD SALT

TORREPINES

CAPTAINS

EDINBURGH

GREEN GRASS

HOLLOW BROOK

WOODCREEK WOODCREEK

SADDLEBROOK

FOREST RIDGE
VETS

MEDEA BROOK

HOLLOW OAK

MEADOW HAVEN
AMELIA

GREENBRIAR

BRAEMAR
GLEAM
RENEE
EMBER

PARKHEATH

BURLESON

LANGHALL

ROCK CREEK

BAMFIELD

CANMORE

CAMBRIDGE CAMBRIDGE

OLD CARRIAGE

CATHERWOOD

HIGH PEAK

INDIAN RIDGE
KIVA

FRESHWATER

WATERTREE

CALLE MONTECILLO

WILLOWTREE

GARNET HILL

HURFORD
CANYON

CALLE ROBELDA
CLEE

BRIDGEWATER

TACKABERRY

WHALEBOAT

DEERVIEW

PROMONTORY

LAZY OAK
DART

GLADEHOLLOW

LAUREL BLUFF

BAINBRIDGE

OAKVISTA

SUN VALLEY

EASTVALE

YERBA SECA

DAVEY JONES

SAILBOAT

CRESTHAVEN

HARTGLEN

GAMEBIRD
OAKFEN

COBBLESTONE

TREE HOLLOW
ALDREN

PORTSIDE

CHELSEA

MIDDLECREST

CALLE MARGARITA

ROCK VISTA

PINEWOOD

WHITINGHAM

HEATHER

EVITA COURT

POINTED OAK

CALLE ROBLEDA

REYES ADOBE

PASSAGEWAY
KANAN

THOUSAND OAKS
LEWIS

TIMBERLANE

THOUSAND OAKS

MAINMAST

QUAIL RUN

WOODBROOK

THOUSAND OAKS

MIDDLE CREST

LAURA LA PLANTE

CANWOOD

DOROTHY

DOROTHY
LEWIS

CANWOOD

PASSAGEWAY
LEWIS

RAINBOW HILL

RIDGEWAY
±

CITY OF AGOURA HILLS

SEWER SYSTEM MANAGEMENT PLAN
JUNE 2009
1 inch = 500 feet
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MATCHLINE - SEE RIGHT
(
(
(
AGOURA

PATRICK HENRY

LIBERTY CNYN LIBERTY CYN
YANKEE
UNITED

DEFENDER

JIM BOWIE

OAK SUMMIT
REVERE
UNITED
AGOURA
(

JIM BOWIE
(
(

COUNTRY GLEN PATRICK HENRY

FREETOWN

PROVIDENT

PARK VISTA

JOELTON

ENDEAVOR

TARRYTOWN TARRYTOWN

GADSHILL
U:\jn17003_AgouraHillsSSMP\_MapFiles\pl_SSWR_APPENDIX_L2.MXD PLOTTED JUNE 26, 2009 APPENDIX L-2:

SEWER SYSTEM

CAPACITY ANALYSIS

DEFICIENT PIPES
2401 E. Katella Avenue, Suite 450
Anaheim, CA 92806
(714)978-8200 fax (714)978-8299
0 500 1,000 1,500 250
Feet
LEGEND

SEWER PIPES

0.85 < d/D (UNSTABLE OR FULL FLOW)

0.64 < d/D < 0.85

0.50 , d/D < 0.64 (EXCEEDS DESIGN - MONITOR)
2!!

LOCAL MANHOLES

PRIVATE SEWER PIPES

PRIVATE SEWER MANHOLES
LVMWD Sewer Trunk

SEWER MAINTENANCE ZONES
( SEWER MAINTENANCE ZONE ID'S

CITY BOUNDARY
53 Appendix ‘M’
1 POLICIES FOR MANAGING AVAILABLE SEWER CAPACITY

INTRODUCTION
In 2009 the City serves the wastewater disposal needs of approximately 23,350 people. The community sewers receive and convey approximately 3.6 million gallons per day of wastewater to regional CSD trunk sewers and wastewater treatment plants.

The purpose of this document is to describe the policies and practices followed by the City in tracking and determining the remaining available capacity within its sanitary sewer system.

Tracking (monitoring) is necessary because of the significant lead time required for accomplishing such improvements as sewer rehabilitation or facility expansion without overloading sewage facilities. The objective is to enable the City to:
• Become more aware of how the sewer facilities are performing in order to take steps necessary to avoid (prevent) a SSO or nuisance problem due to operations. • Provide all local decision makers with information needed to make informed decisions about the capacity of the wastewater system and its ability to accommodate new or increased connections.
• Make commitments for new or upsized connections with confidence that there is adequate capacity to serve additional demand as well as existing customers. • Determine when the issuance of additional building permits must be curtailed until sewer facility improvements are completed so that facilities are maintained in compliance with discharge permit criteria.
• Have more lead time to plan and arrange financing for needed sewer system upgrades.

LEGAL MANDATE TO MANAGE WASTEWATER ALLOCATIONS
Local sewering entities have a crucial role in providing safe and adequate wastewater systems and high quality operational performance. These entities face many challenges to maintain and operate their systems in compliance with Federal and State laws and regulations. Cost continues to increase to keep these increasingly complex facilities operating properly, and the ability to raise rates to keep pace with costs is a challenge.

Perhaps most challenging is the need to manage the allocation of flow for new or expanding customer discharges in conformance with local land use, water and sewage plans, and the NPDES and local permit limits. The agency responsible for issuing building/development Appendix ‘M’
2 approvals and permits must ensure adequate capacity is or will be reasonably available without impairing water quality or threatening public health and safety.

ACTIONS TO BE TAKEN TO MANAGE AVAILABLE SEWER CAPACITY
Sewering entities are expected to manage their facility capacities responsibly and to ensure sewer systems remain within design capacity. In order to accomplish these expectations, it is necessary to prepare a planning and engineering tool used to monitor the relationship between sewer facility capacity and population/economic growth while complying with statutes and regulations relative to discharges. Such tool could be a Municipal Sewage Capacity Plan/Report (MSCP/R).

A MSRC/P would contain information on sewage system capacity including the demand created by both the existing and proposed development. To ensure the accuracy of such report will require the City to monitor flows, evaluate the need for additional capacity, identify deficiencies, take proactive, corrective steps to maintain system capacity, and to undertake orderly and timely projects to maintain or improve the system capacity. These actions for a successful reporting tool will be accomplished through the application of the following policies:

1. Develop a moving 10 year capital improvement program that:
a. Includes pro-active sanitary sewer system improvements to correct and prevent system failures and overflows,
b. Addresses current and reasonably anticipated regulatory requirements, c. Provides sewer capacity in a timely manner to accommodate system expansion and redevelopment,
d. Maintains level of service standards that are desired and acceptable to the community.

2. Actively manage the sanitary sewer conveyance system through a data collection and analysis process that determines wastewater usage by development type, projects future demand, and identifies inflow/infiltration deficiencies.

3. Issue development approvals based upon available capacity of the sanitary sewer system.

4. Implement work process and data management systems improvements for sewer service management, operation, and maintenance that comply with SSMP regulations and result in more effective and efficient sewer service.

5. Abate storm water inflow and groundwater infiltration to maintain capacity for sewer service and minimize service costs.

Appendix ‘M’
3 6. Expand the production and annual average use of recycled water to reduce the cost and environmental risk of effluent disposal and reduce reliance upon potable water sources.

7. Implement complete asset management program for sustaining the sewer infrastructure through optimized service levels, managed risks, and minimized life-cycle costs of asset ownership
Appendix “M”
Policies for Managing
Available Sewer Capacity
Appendix ‘M’
1 POLICIES FOR MANAGING AVAILABLE SEWER CAPACITY

The purpose of this document is to describe the policies and practices followed by the City in tracking and determining the remaining available capacity within its sanitary sewer system.

3. Issue development approvals based upon available capacity of the sanitary sewer system.

5. Abate storm water inflow and groundwater infiltration to maintain capacity for sewer service and minimize service costs.

Appendix ‘M’
3 6. Expand the production and annual average use of recycled water to reduce the cost and environmental risk of effluent disposal and reduce reliance upon potable water sources.

7. Implement complete asset management program for sustaining the sewer infrastructure through optimized service levels, managed risks, and minimized life-cycle costs of asset ownership
Appendix “N”
CCTV Inspection Report
GAIL FARBER, Director
December 9, 2008

COUNTY OF LOS ANGELES

DEPARTMENT OF PUBLIC WORKS
"To Enrich Lives Through Effective and Caring Service"
900 SOUTH FREMONT AVENUE
ALHAMBRA, CALIFORNIA 91803-1331
Telephone: (626) 458-5100
http://dpw.lacounty.gov ADDRESS ALL CORRESPONDENCE TO:

P.O. BOX 1460
ALHAMBRA, CALIFORNIA 91802-1460

IN REPLY PLEASE
REFER TO FILE SM-1
Mr. Ramiro Adeva, City Engineer
City of Agoura Hills
30001 Ladyface Court
Agoura Hills, CA 91301
Attention Mr. Jay Patel
Dear Mr. Adeva:

CONSOLIDATED SEWER MAINTENANCE DISTRICT

CONDITION ASSESSMENT PROGRAM REPORT
PROJECT YOTV0506F
This letter is to inform you that as part of the Sewer Condition Assessment Program, the County of Los Angeles Department of Public Works Consolidated Sewer Maintenance District has completed the closed-circuit television (CCTV) inspection of 29,407 feet or approximately 10.2 percent of the City of Agoura Hills sewer system.

The enclosed report outlines the structural and maintenance ratings of your system based on the Pipeline Assessment and Certification Program's rating methodology.

Included in the report are the following:
• Condition Assessment Report
• Project Overview Map (Enclosure 1)
• Quick Maintenance Rating Report Priority List and Quick Maintenance Rating Map (Enclosure 2)
• Quick Structural Rating Report Priority List and Quick Structural Rating Map (Enclosure 3)
• Infrastructure Inspection Reports for Grades 4 and 5 (Enclosure 4) • CCTV Sewer Inspection Project Schedule (Enclosure 5)
Mr. Ramiro Adeva
December 9, 2008

Page 2 ends

Agoura Hills City CouncilOctober 22, 2025

Agoura Hills City Council
October 22, 2025