HomeMy WebLinkAbout05.a. Receive Collection System Operations 2021 Sanitary Sewer Overflow (SSO) Annual ReportPage 1 of 7
Item 5.a.
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February 16, 2022
TO: ENGINEERING AND OPERATIONS COMMITTEE
FROM: PAUL SEITZ, COLLECTION SYSTEM OPERATIONS DIVISION MANAGER
REVIEWED BY: STEVE MCDONALD, DIRECTOR OF OPERATIONS
ROGER S. BAILEY, GENERAL MANAGER
SUBJECT: RECEIVE COLLECTION SYSTEM OPERATIONS 2021 SANITARYSEWER
OVERFLOW (SSO)ANNUAL REPORT
Staff will present the attached 2021 Sanitary Sewer Overflow Annual Report at the meeting for input prior
to presenting to the entire Board of Directors.
Strategic Plan re -In
GOAL ONE: Customer and Community
Strategy 1— Deliver high -quality customer service, Strategy 2 — Maintain a positive reputation
GOAL FOUR: Workforce Development
Strategy 4 — Meet or exceed industry safety standards
GOAL FIVE: Infrastructure Reliability
Strategy 1— Manage assets optimally to prolong their useful life, Strategy 2 — Execute long-term capital renewal and
replacement program
GOAL SIX: Innovation and Optimization
Strategy 2— Improve and modernize operations through technology and efficiency measures
GOAL SEVEN: Agility andAdaptability
Strategy 1— Maintain a safe working environment for employees and the public during the COVID-19 pandemic
ATTACHMENTS:
1. Presentation
February 16, 2022 EOPS Regular Committee Meeting Agenda Packet - Page 14 of 53
Page 2 of 7
ANNUAL REPORT OF SANITARY
SEWER OVERFLOWS
Paul A. Seitz
Division Manager
Collection System Operations
March 3, 2022
1
2021 SANITARY SEWER OVERFLOWS
U26 Overflows
1.69 overflows per 100 Miles
No Capacity Overflows
N
February 16, 2022 EOPS Regular Committee Meeting Agenda Packet - Page 15 of 53 1
Page 3 of 7
COMPARATIVE DATA FOR 2021
FROM
STATE
DATABASE
Number of
2,847
838 26
Overflows
Total Volume
(Gallons)
30,237,266
15,891,067 6,811
Overflows per
3.90
5.29 1.69
100 Miles
Average Volume
10,621
18,963 262
per SSO (Gallons)
* Information from CIWQS Public Spill Report —Summary Page on 1/20/22
-1
9
OVERFLOWS COMPARISON
NUMBER OF OVERFLOWS
180 �
162
160 143 14
140 10o 135
123
120 107
100 } :z. 81 86
80 3
3
60 — 43 37 49 48 49 49 40 38
40 28
22 24 26
000'01 '02 b3 '04 'OS '06 '07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17 '18 '19 20 21
4
February 16, 2022 EOPS Regular Committee Meeting Agenda Packet - Page 16 of 53 2
Page 4 of 7
OVERFLOW QUANTITIES
Size of • (Gallons) Number in 2020 Number in 2021
Greater Than or 5 1
Equal to 1,000
Between 100 and 999 5 10
Between 10 and 99 11 9
Less Than 10 3 6
Total Overflow Volume 49,089 gallons 6,811 gallons
w
g
5
CATEGORY 1 OVERFLOWS
ANY VOLUME OF WASTEWATER THAT REACHES THE WATERS OF THE STATE)
8
7
7
6 6
e
3 5
0 4
- 4
E 3
Z 3
2
z
1 —
016 2017 2018 2019 2020 2021
YEAR
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February 16, 2022 EOPS Regular Committee Meeting Agenda Packet - Page 17 of 53 3
Page 5 of 7
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2021 OVERFLOW CAUSES
2021 OVERFLOWS
BY CITY
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February 16, 2022 EOPS Regular Committee Meeting Agenda Packet - Page 18 of 53 4
On November 10, 2020, a contractor damaged one of the Orinda Crossroads 30" force
mains resulting in a 22,000-gallon CAT 1 overflow.
CSO Crews responded and installed bypass pumping. Final repairs to the damaged force
main were completed on November 12, 2020.
An investigation by Safety Division determined that there was a fault with the design, USA
requests, and the marking of the District's force main.
Locating SOP was revised to mandate a District staff member be present when excavating
within 50' of any force main, ReW pipeline, and Pumping Station.
Staff was present for three separate excavations that were near or adjacent to our force
mains since revising SOP.
In the last six years, there have been 147,418 locating requests and this is the first line that
has been damaged by a contractor who made a request. A success rate of 99.99932%.
Cleaned 750 miles of scheduled and routine sewers. 17,112 work orders were
completed on schedule, 99% of the time.
CCTV'd 116 miles of sewers.
Completed 75 spot repairs and 220 structure adjustments.
Received and cleared over 30,560 USA requests on time.
Completed 874 services on vehicles and equipment. DOT regulated services were
completed on schedule, 100% of the time. Uptime for vehicles was 100%.
Conducted survey of 100% of all customers' emergency calls.
196 Customer Surveys were sent to ratepayers. 49 surveys were
submitted for a return rate of 25%.
Average Customer Service rating was 3.85 out of 4.0.
Received a rating of 4.0 for 7 months of the year.
Average response time was 30.6 minutes.
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