HomeMy WebLinkAbout12.b. Receive Collection System Operations 2022 Santiary Sewer Overflow annual report Page 1 of 7
Item 12.b.
CENTRALSAN
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CENTRAL CONTRA COSTA SANITARY DISTRICT
March 2, 2023
TO: HONORABLE BOARD OF DIRECTORS
FROM: PAUL SEITZ, PROVISIONAL DIRECTOR OF OPERATIONS
REVIEWED BY: ROGER S. BAILEY, GENERAL MANAGER
SUBJECT: RECEIVE COLLECTION SYSTEM OPERATIONS 2022 SANITARYSEWER
OVERFLOW (SSO)ANNUAL REPORT
Staff will present the 2022 SSO Annual Report at the meeting.
Strategic Plan Tie-In
GOAL ONE: Customer and Community
Strategy 1—Deliver high-quality customer service
ATTACHMENTS:
1. Presentation
March 2, 2023 Regular Board Meeting Agenda Packet- Page 83 of 313
Page 2 of 7
March 2,2023 —
ANNUAL REPORT
OF SANITARY
SEWER - -
OVERFLOWS
Paul A.Seitz
Provisional Director of Operations
1
2022 Sanitary Sewer ►� �
Overflows (SSO)
i
23 Overflows
7
t
Overflows per 11 miles
r
No Capacity Overflows
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z
March 2, 2023 Regular Board Meeting Agenda Packet- Page 84 of 313 1
Page 3 of 7
Comparative Data for 2022 from
State Database '
Number of 2,652 749 23 1-0
Overflows
Total Volume 1 10,297,941 103,704,436 50,605
(Gallons)
= I
Overflows per 3.44 4.65 1.49
100 Miles
Average Volume per x 41,591 138,457 2,200
SSO (Gallons) 4,
I
* Information from California Integrated Water Quality System (CIWQS) Public Spill Report—
Summary Page on January 20,2023
Overflows Comparison
NUMBER OF OVERFLOWS
lso
162
160 143 14 135
140 1 123 a
120 ��` 107
100- ` . ..: 81 86
80 3
3
60 r 43 49 48 49 43 40
f 37 38
40 - 28 22 24 ?b 23
20
1999 2000'01 '02 '03 '04 '05 '06 '07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17 '18 '19 20 '21 '22
March 2, 2023 Regular Board Meeting Agenda Packet- Page 85 of 313 2
Page 4 of 7
Overflow Quantities
lip
Size of SSO(Gallons) Number in 2021 Number in 2022
Greater Than or 1 6
Equal to 1,000
Between 100 and 999 10 7 r
Between 10 and 99 9 8
Less Than 10 6 2
Total Overflow Volume 6,811 gallons 50,605 gallons
Category 1 Overflows
,
(any volume of wastewater that reaches the waters of the state)
8
N '
3 '
0 6
� 6
L
0
> 5
4
4
O 3 3
L. 3
-0 2
2017 2018 2019 2020 2021 2022
YEAR
March 2, 2023 Regular Board Meeting Agenda Packet- Page 86 of 313 3
Page 5 of 7
2022 Overflow Causes
Physical Defect,13%
Roots,52%
Other Plug,30%
Grease,4%
7
rr i�
2022 Overflows by City
12 s.:•,.
10
O 8
rc �
W
6
0
m 4
L
Zlow
2
•
0 FW
Concord Lafayette Martinez Orinda Pleasant Walnut
Hill Creek
CITY
March 2, 2023 Regular Board Meeting Agenda Packet- Page 87 of 313 4
Cleaned 780 miles of scheduled and routine sewers. 17,844 work orders
were completed on schedule,99%of the time. -
Closed-circuit televised (CCTV'd) 102 miles of sewers.
Completed 43 spot repairs and 103 structure adjustments. Y
Received and cleared over 31,590 USA requests on time. R ��
JA,—
Completed 1,005 services on vehicles and equipment. Department of ,
Transportation (DOT) regulated services were completed on schedule, 100%
of the time. Uptime for vehicles was 100%.
• — — 7
ea.
Conducted survey of 100%of all customers'
emergency calls.
169 Customer Surveys were sent to ratepayers.
surveys were submitted for a return rate of 28%.
Average Customer Service rating was 3.97 out of 4.0. v
Received a rating of 4.0 for I I months of the year. w
Average response time was 35.5 minutes. — -
i�CsD4CON; ...
DISTRICT
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Page 7 of 7
Questions? �-
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March 2, 2023 Regular Board Meeting Agenda Packet- Page 89 of 313 6