HomeMy WebLinkAbout13.b. Receive 2019 Collection System Operations Sanitary Sewer Overflow (SSO) Annual Report Page 1 of 9
Item 13.b.
k�*k CENTRAL SAN
CENTRAL CONTRA COSTA SANITARY DISTRICT
February 20, 2020
TO: HONORABLE BOARD OF DIRECTORS
FROM: PAUL SEITZ, COLLECTION SYSTEM OPERATIONS DIVISION MANAGER
REVIEWED BY: ANN SASAKI, DEPUTY GENERAL MANAGER
ROGER S. BAILEY GENERAL MANAGER
SUBJECT: RECEIVE COLLECTION SYSTEM OPERATIONS 2019 SANITARYSEWER
OVERFLOW (SSO)ANNUAL REPORT
Attached is the 2019 Sanitary Sewer Overflow Annual Report.
Strategic Plan Tie-In
GOAL ONE:Provide Exceptional Customer Service
Strategy 1 - Build external customer relationships and awareness
GOAL TWO: Strive to Meet Regulatory Requirements
Strategy 2- Strive to minimize the number of sanitary sewer overflows
GOAL FOUR: Develop and retain a highly trained and innovative workforce
Strategy 1 - Ensure adequate staffing and training to meet current and future operational levels
GOAL FIVE: Maintain a Reliable Infrastructure
Strategy 1 - Manage assets optimally throughout their lifecycle
ATTACHMENTS:
1. 2019 SSO Annual Report
February 20, 2020 Regular Board Meeting Agenda Packet- Page 98 of 161
Page 2 of 9
02/10/20
ANNUAL REPORT OF SANITARY
SEWER OVERFLOWS
Paul A. Seitz
Division Manager
Collection System Operations Division
February 20, 2020
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2019 SANITARY SEWER OVERFLOWS
Overflows22
00 Miles
OverflowsNo Capacity
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February 20, 2020 Regular Board Meeting Agenda Packet- Page 99 of 161
Page 3 of 9
02/10/20
COMPARATIVE DATA FOR 2019
FROM STATE DATABASE
Number of 2,989 883 22
Overflows
Total Volume 16,610,619 7,897,488 12,947
(Gallons)
Overflows per
3.87 5.69 1.43
100 Miles
Average Volume
per SSO(Gallons) 5,557 8,943 588
*Information from CIWQS Public Spill Report—Summary Page on 2/3/2020
3 1
OVERFLOWS COMPARISON
NUMBER OF OVERFLOWS
180 162
160 43
14 135
140 123
120 107
100 a �', 81 86
80 3 63
60 40 S. 43 37 49 48 49 43 40 38 28
22
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
4
2
February 20, 2020 Regular Board Meeting Agenda Packet- Page 100 of 161
Page 4 of 9
02/10/20
OVERFLOW QUANTITIES
Size of • 2018 Number in 2019
Greater Than or 1 2
Equal to 1,000
Between 100 and 999 7 13
Between 10 and 99 17 5
Less Than 10 3 2
Total Overflow Volume 5,869 gallons 12,947 gallons
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2019 OVERFLOWS
BY CITY
10
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Alamo Danville Lafayette Martinez Crinda Pleasant Hill Walnut Creek
CITY
6
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February 20, 2020 Regular Board Meeting Agenda Packet- Page 101 of 161
Page 5 of 9
02/10/20
2019 OVERFLOW CAUSES
Physical
Defect,18%
Other Plug,9% Roots,59%
Grease,14%
7 I
2019 OVERFLOWS
BY PIPE SIZE AND TYPE
061, 08"
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AC CAS DIP HDPE MANHOLES VCP
PIPE SIZE
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February 20, 2020 Regular Board Meeting Agenda Packet- Page 102 of 161
1 / 1
VOLUMECATEGORY 1 OVERFLOWS
OF OF
\.1116. 2015 2016 2017 2018
YEAR
Cleaned 797 miles of scheduled and routine sewers. 18,087 work orders were completed
on schedule 99%of the time
559 of the 797 miles(70%)were attributed to a 1,2,3,6 and 12 month schedules
156 of the 797 miles(20%)were attributed to Hotspots-1,2,and 3 month schedules
CCTV'd 183 miles of sewers.
Completed 45 spot repairs and 171 structure adjustments.
Received and cleared over 30,218 USA requests on time.
Completed 927 services on vehicles and equipment.DOT regulated services were
completed on schedule 1000 of the time. Up time for vehicles was greater than 95%.
S
1 / 1
Conducted survey of 100%of all customers'emergency calls.
193 Customer Surveys were sent to ratepayers. 57 surveys were
submitted for a return rate of 30%.
Average Customer Service rating was 3.87 out of 4.0.
Received a rating of 4.0 for 8 months of the year.
Average response time was 32.5 minutes.
22 overflows which equates to 1.43 overflows per 100 miles. This is the
lowest on record for CentralSan
Reduced overflows by 21%from calendar year 2018
The collections system conveyed 99.9999%of the wastewater received to
the treatment plant
This is the first year there were no claims from an overflow inside a
residence.
Provided a tour to the State and Regional Water Quality Control Boards
.SCC JJ
Page 8 of 9
02/10/20
STRATEGIC PLAN METRICS
GOAL 1 - CUSTOMER SERVICE
Response time Less than 20 29 minutes
during working minutes
hours
Response time Less than 40 36 minutes
after hours minutes
Average Customer Greater than 3.8 3.87
Service Rating out of 4.0
x.
13
STRATEGIC PLAN METRICS
GOAL 2 - MEET REGULATORY
REQUIREMENTS
Actual(CY 2019)
SSO's/100 miles 2.5 per 100 miles 1.43 per 100 miles
Spills to Public Waters Less than 3 6
%of Spill less than 500 Greater than 95% 77%(5 overflows>500
gallons gallons)
Cleaning schedules Greater than 95% 99.01%
completed on time
Cleaning QA/QC 3%of pipelines cleaned 3.78%
QA/QC Pass Rate Greater than 98% 97.19%
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February 20, 2020 Regular Board Meeting Agenda Packet- Page 105 of 161
Page 9 of 9
02/10/20
Questions?
:L
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February 20, 2020 Regular Board Meeting Agenda Packet- Page 106 of 161