HomeMy WebLinkAbout07.a. Receive 2017 Sanitary Sewer Overflow Annual Report Page 1 of 13
Item 7.a.
Central Contra Costa Sanitary District
February 15, 2018
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 2017 SANITARY SEWER OVERFLOW
ANNUAL REPORT
Attached is the presentation in support of this item.
Strategic Plan Tie-In
GOAL ONE: Provide Exceptional Customer Service
Strategy 1 - Foster Customer Engagement and Awareness
GOAL TWO: Strive to Meet Regulatory Requirements
Strategy 1 - Strive to Achieve 100% Permit Compliance in Air, Water, Land and Other Regulations, Strategy 2- Strive
to Minimize the Number of Sanitary Sewer Overflows
GOAL FIVE: Maintain a Reliable Infrastructure
Strategy 1 - Manage Assets Optimally Throughout Their Lifecycle
ATTACHMENTS:
1. 2017 Annual Report of Sanitary Sewer Overflows
February 15, 2018 Regular Board Meeting Agenda Packet- Page 22 of 77
ANNUAL REPORT OF SANITARY
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SEWER OVERFLOWS
Paul A. Seitz
Division Manager
Collection System Operations Division
February 15, 2018
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February 15, 10r.Board M - Pqnia 91 nf 77
3 8 Ove rf I ows
2 .50 per 100 Miles
No Capacity Overflows
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COMPARATIVE DATA FOR 2017
FROM STATE DATABASE
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Number of 31149 11001 38
Ove rf I ows
Total Volume 38,687,984 13,168,882 330,226
(Gallons)
Overflows per
4.22 6.62 2.50
100 Miles
Average Volume 121286 13,156 81690
per SSO (Gallons)
* Information from CIWQS as of 1/30/18
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OVERFLOWS COMPARISON
1999 =2017
NUMBER OF OVERFLOWS
180 -
162
160 143 141
35
140 1
1 123
120 107
100 _ _. 81 86
80 - _ `!tea 73
63
60 - 43 49 48 49 43
,- 37 40 38
40
20
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
OVERFLOW QUANTITIES
101r,-7- ___-N -Size of • (Gallons) Number in 2016 kL Number in 2017
Greater Than or 4 4
Equal to 1,000
Between 100 and 999 12 10
Between 10 and 99 16 18
Less Than 10 8 6
Total Overflow Volume 29,200 gallons 330,226 gallons*
* The SSO on Miner Road (243,100 gallons) and Reliez Valley Road (79,045
gallons) attributed 97.6% of the total overflow volume in 2017
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2017 OVERFLOWS
BY CITY
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Alamo Lafayette Martinez Orinda Pleasant San Walnut
Hill Ramon Creek
CITY
2017 OCAUSES
Other Plug, 13% -�
Physical Defect,
5%
Rags, Rock, Debris,
8%
Grease, 5%
Roots, 68%
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2017 OVERFLOWS
BY PIPE SIZE AND TYPE
■ABS ■ACP I CIP ■ HDPE L- PVC VCP
25
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2
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6" 8" 10" 12" 18"
PIPE SIZE
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CATEGORY 1 OVERFLOWS
ANY VOLUME OF WASTEWATER THAT REACHES THE WATERS OF THE STATE
9
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2012 2013 2014 2015 2016 2017
YEAR
•
Completed 656 miles of scheduled cleaning footage and 103 miles of routine cleaning
footage.
Cleaned 759 miles of sewers . Annual frequencies are 1, 2, 3, 6 and 12 months
CCTV'd 167 miles of sewers.
Completed 70 spot repairs and 60 structure adjustments.
Accomplished over 16,156 cleaning schedules and work orders that were completed on
schedule 99% of the time.
Received and cleared over 26,000 USA requests on time.
Completed 987 services on vehicles and equipment. DOT regulated services were
completed on schedule 100% of the time. Up time for vehicles was greater than 95%.
• •
or
Conducted survey of 100% of all customers' emergency calls.
197 Customer Surveys were sent to ratepayers. 46 surveys were
submitted for a return rate of 23%.
Average Customer Service rating was 3.97 out of 4.0.
Received a rating of 4.0 for 10 months of the year.
Average response time was 40.7 minutes.
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Questions ?.
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