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Tom B. MeregillanoRegulatory SpecialistOrange County Sanitation District, CA
Tom B. MeregillanoRegulatory SpecialistOrange County Sanitation District, CA
OCSD Urban Runoff ProgramSCAP – Collection Systems in Motion
OCSD Urban Runoff ProgramSCAP – Collection Systems in Motion
Los AngelesLos Angeles
San DiegoSan Diego
Orange County,California
OCSD Service AreaOCSD Service Area
Santa AnaSanta Ana
Santa AnaRiver
Santa AnaRiver
July 1 - September 3, 1999 upto 4 1/2 miles (23,000 feet) ofHuntington Beach was closeddue to elevated bacteria level
July 1 - September 3, 1999 upto 4 1/2 miles (23,000 feet) ofHuntington Beach was closeddue to elevated bacteria level
Huntington State Beach, CaliforniaHuntington State Beach, California
Leaking Sewer Lines(groundwater flow)
Leaking Sewer LinesLeaking Sewer Lines(groundwater flow)(groundwater flow)
Urban Sources(nuisance &
stormwater runoff)
Urban SourcesUrban Sources(nuisance &(nuisance &
stormwater runoff)stormwater runoff)
EnvironmentalSources
(direct & tidal inputs)
EnvironmentalEnvironmentalSourcesSources
(direct & tidal inputs)(direct & tidal inputs)
Causes of Beach ClosuresCauses of Beach Closures
RunoffRunoff
Low Flow Diversion SystemsLow Flow Diversion Systems
Bermsin stormwater
channels
Pumpstationin stormwater
well
Pumpstationin stormwater
well
OCSDwastewater
treatment plant
OCSDwastewater
treatment plant
Low Flow Diversion SystemsLow Flow Diversion Systems
Concreteberm
Concreteberm
Diversion pipeconnected
to sewer line
Diversion pipeconnected
to sewer line
Temporary –Santa Ana River Channel DiversionTemporary –Santa Ana River Channel Diversion
Concrete Damto Wet Well
Concrete Damto Wet Well
Permanent –Santa Ana River Channel DiversionPermanent –Santa Ana River Channel Diversion
Concreteberm
Concreteberm
Diversion pipeconnected
to sewer line
Diversion pipeconnected
to sewer line
Temporary – Channel DiversionTemporary – Channel Diversion
Permanent – Channel DiversionPermanent – Channel Diversion
InflatableRubber Dam
InflatableRubber Dam
Diversion pipe connectedto sewer line
Diversion pipe connectedto sewer line
Wet wellWet well
Stormwater / Urban RunoffPump StationStormwater / Urban RunoffPump Station
Urban Runoff – Why Care?Urban Runoff – Why Care?
u Public healthu Recreational
water bodiesu Economyu Quality of life
u Public healthu Recreational
water bodiesu Economyu Quality of life
Important RegulationsImportant Regulations
u Orange County stormwater NPDESpermit
u Assembly Bill 411 (ocean water –contact sports standards)
u Total Maximum Daily Load (TMDL)
u Orange County stormwater NPDESpermit
u Assembly Bill 411 (ocean water –contact sports standards)
u Total Maximum Daily Load (TMDL)
Orange County13 Watersheds
40–70 MGD dry weather urban runoff
Orange County13 Watersheds
40–70 MGD dry weather urban runoff
SealBeachSeal
Beach
Bolsa ChicaState BeachBolsa ChicaState Beach
HuntingtonState BeachHuntingtonState Beach
NewportBay
NewportBay
Sant
a An
aSa
nta
Ana
Rive
rRi
ver
TMDL AreasTMDL Areas
CrystalCove Creek
CrystalCove Creek
OCSD’s Urban Runoff SolutionsOCSD’s Urban Runoff Solutions
u Aug 1999 – Stormwater pump stationdiversions
u Jun 2000 – Channel and river diversions
u Sep 2000 – Dry Weather Urban Runoff Policy
u Jan 2002 – Proposal to amend OCSD’sCharter – AB 1892
u Jun 2002 – Legislation AB 1892 approvedby Governor
u Aug 1999 – Stormwater pump stationdiversions
u Jun 2000 – Channel and river diversions
u Sep 2000 – Dry Weather Urban Runoff Policy
u Jan 2002 – Proposal to amend OCSD’sCharter – AB 1892
u Jun 2002 – Legislation AB 1892 approvedby Governor
ORANGECOUNTYORANGECOUNTY
OCSD Santa MargaritaWater District
Irvine Ranch WaterDistrict
City ofLaguna Beach City of
San Clemente
Emerald BayServices District
South CoastWater District
Moulton NiguelWater District
Agencies in Orange CountyTreating Urban RunoffAgencies in Orange CountyTreating Urban Runoff
SealBeach
HuntingtonBeach
FountainValley
CostaMesa
NewportBeach
SantaAna
Irvine
Westminster
GardenGrove
Tustin
16 Current16 Current
28 Proposed28 Proposed
DiversionsDiversions
10 MGD10 MGD
4 MGD4 MGD3 MGD3 MGD
MAXIMUM Capacity
Fee Threshold
Flow Volume
Orange County Sanitation DistrictDry Weather Urban Runoff Diversion Monthly Averages, gpd
1,326
,932
728,8
97
1,616
,124
1,900
,012
2,366
,041
2,432
,316
2,413
,271
2,061
,429
919,3
37
769,2
59
871,1
70
666,2
22
530,3
11
787,3
74
783,1
08
2,832
,740
2,847
,238
3,058
,586
1,243
,397
2,407
,785
-
500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000
4,000,000Ja
n'04 Feb
Mar
Apr
May
Jun Jul
Aug
Sep
Oct
Nov
Dec
Jan'0
5 Feb
Mar
Apr
May
Jun Jul
Aug
monthly average
gallo
ns pe
r day
Decreasein Overall30-Day GeometricMean Post Diversions
Decreasein Overall30-Day GeometricMean Post Diversions
Decreasein Overall30-Day GeometricMean Post Diversions
Decreasein Overall30-Day GeometricMean Post Diversions
OCSD Urban Runoff ProgramOCSD Urban Runoff Program
u 6 years experience
u Treating as high as 3 MGD of dry weather urbanrunoff from coastal cities during the summer
u No fees if under 4 MGD & 10 MGD maximumflow
u Permit and enforcement
u Treatment Costs approx. $529,000 annual @ave. 1.5MGD
u 6 years experience
u Treating as high as 3 MGD of dry weather urbanrunoff from coastal cities during the summer
u No fees if under 4 MGD & 10 MGD maximumflow
u Permit and enforcement
u Treatment Costs approx. $529,000 annual @ave. 1.5MGD
Benefits OCSD Urban RunoffProgramBenefits OCSD Urban RunoffProgramu One tool for for addressing NDPES permit,
AB411, and TDML regulations
u Containment for SSOs
u Public health and environmental protection
u Economic benefits
u Foster regional partnerships and newtechnologies
u One tool for for addressing NDPES permit,AB411, and TDML regulations
u Containment for SSOs
u Public health and environmental protection
u Economic benefits
u Foster regional partnerships and newtechnologies
Issues Related to Urban RunoffDiversionIssues Related to Urban RunoffDiversionu One tool of many
u Emerging pollutants
u Limited collection and treatment capacity
• Storm flows impossible to divert
• What about “first flush”?
• Who builds and operates the infrastructure?
u Who takes responsibility – who pays?
u One tool of many
u Emerging pollutants
u Limited collection and treatment capacity
• Storm flows impossible to divert
• What about “first flush”?
• Who builds and operates the infrastructure?
u Who takes responsibility – who pays?
Regional Cooperative Projects inOrange County
Regional Cooperative Projects inOrange County
Dry WeatherDiversion SystemDry WeatherDiversion System
WetlandTreatment SystemWetlandTreatment System
Tom Meregillano(714) 593-7457Source Control Divisiontmeregillano@ocsd.com
Tom Meregillano(714) 593-7457Source Control Divisiontmeregillano@ocsd.com
Orange County Sanitation Districtwww.ocsd.comOrange County Sanitation DistrictOrange County Sanitation Districtwww.ocsd.comwww.ocsd.com
Questions?Questions?
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