HomeMy WebLinkAbout04.c. Receive report on California Association of Sanitation Agencies (CASA) Private Sewer Lateral Survey
C ALIFORNIA A SSOCIATIONOF
S ANITATION A GENCIES(CASA)
P
RIVATE S EWER L ATERAL S URVEY
Paul A. Seitz
Division Manager
Collection System Operations Division
June 20, 2018
S URVEY I NTRODUCTION
Θ California Association of Sanitation Agencies
(CASA) Collection System Committee formed a
Private Lateral Subcommittee (subcommittee)
Θ Purpose of the subcommittee was to find out
what are the common practices for various
aspects of Private Sewer Laterals
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S URVEY I NTRODUCTION
Θ 41 survey questions were finalized by the
subcommittee
Θ Survey was sent to all 110 CASA members
Θ 35% Response Rate
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R ESPONDENT S IZE C ATEGORY
%OFRESPONDENTSBYSIZECATEGORY
58%
28%
14%
SMALL(0249MILES)MEDIUM(250500MILES)LARGE(>500MILES)
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R ESPONDENT D EMOGRAPHICS
%OFRESPONDENTSBYREGION
Region1
Region9Region1
Region8
3%
10%
5%
Region2
Region7
Region3
0%
Region6
Region4
10%
Region5
Region2
44%
Region6
Region5
10%
Region7
Region8
Region4
8%
Region9 Region3
10%
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R ESPONDENT S ERVICES P ROVIDED
ServicesProvidedbyRespondents
CollectionOnly
35%
CollectionandTreatment
65%
0%10%20%30%40%50%60%70%
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3
O RDINANCESAND C ODES
AgencieswithOrdinancesorCodesDefining
OwnershipandMaintenanceResponsibilities
38%
62%
WithOrdinancesWithoutOrdinances
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B ACK W ATER O VERFLOW D EVICE(BWOD)
Θ A device installed on a sewer lateral that allows
sewage to be released outside of a building.
Θ 95% of the respondents require BWOD’s on sewer
laterals.
Θ In general, BWOD’s are installed at the building
connection that is located within 2 feet of the
foundation.
Θ BWOD’s are mandated through codes, plan review,
and the permitting process.
Θ Approximately, half of the agencies use their
standard specifications for installation. The other
agencies use the Uniform Plumbing Code (UPC).
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O WNERSHIPAND M AINTENANCE
75% responded that the property owners
Θ
own the entire lateral
25% that do own laterals own only the lower
Θ
lateral (property line to main sewer)
Maintenance practices were consistent with
Θ
ownership. The 25% that owns the lower
lateral only maintains the lower lateral
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R EPORTINGFOR S EWER L ATERAL S EWER
S YSTEM O VERFLOW(SSO’S)
Θ Half the respondents stated that they voluntarily
report Private Lateral Sanitary Discharges (PLSD).
There were 21 responses to this question
Θ Agencies typically report less than 10 PLSD’s per
year, on average
Θ 10% of the total number of SSO’s in the State
were attributed to laterals (info from Sewer
Summit)
Θ 1.5% of the total volume of SSO’s in the State
were attributed to laterals (info from Sewer
Summit)
Θ Appears that PLSD’s are being under-reported –
reporting on a voluntary basis
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I NSPECTION, T ESTINGAND M AINTENANCE
P ROGRAMFOR E XISTING L ATERALS
Θ 25% of respondents have a program
Θ Maintenance is performed when problems are
encountered
Θ Cost to administer program varies based on
size of system –Santa Barbara .5 FTE for
254 miles of sewers ; Sacramento Area Sewer
District (SASD) 197 FTE’s for 3,000 miles of
sewer and 294,000 lateral connections
Θ Triggers for inspection and testing are:
Additional
ΘЊ͵SaleofProperty
Triggersfor
ΘЋ͵BuildingPermit
Lateral
ΘЌ͵RequestofHealthDepartment
Inspections
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I NSPECTIONAND T ESTING P ROGRAMS
Θ There are four methods that are used
to test existing laterals:
Θ Air Test
Θ Hydrostatic Test
Θ Smoke Test
Θ CCTV
Θ The testing method used will be
determined based on the plumbing
configuration
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I NSURANCE, G RANTAND L OAN P ROGRAMS
%ofAgenciesthatProvideFinancialAssistanceforLateral
Replacement
27%
PROVIDESFINANCIAL
ASSISTANCE
DOESNOTPROVIDEANY
FINANCIALASSISTANCE
73%
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I NSURANCE, G RANTAND L OAN P ROGRAMS
Θ Examples of reimbursements:
Offer grant reimbursement of 50% of the cost
up to a maximum of $3,000
Offer grant reimbursement of 50% of the
lowest of three bids received for the work
Loan Programs –very few loan programs,
costly to administer
Insurance Programs –provided by third party
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P UBLIC O UTREACH
Θ 45% of respondents indicate that they conduct
regular public outreach regarding sewer laterals
Θ Outreach topics indicated were grease disposal,
non-flushable wipe education, and emergency
service contact information
Θ A few respondents indicated outreach for
ownership and maintenance responsibilities, but
information is located on company website
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N EXT S TEPS
Θ Finalize CASA Private Sewer Lateral Survey
White Paper
Θ Review CASA Private Sewer Lateral Survey with
CASA Collection System Committee
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Questions?
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