HomeMy WebLinkAbout97.Item 8 PPP Storm Update - Administration Committee 02-08-17Orange County
Sanitation District
OCSD High Flows During Rain
Storms
Ed TorresDirector of Operations and Maintenance
Orange
County
PacificOcean
Ocean Pipeline
ReclamationPlant No. 1
TreatmentPlant No. 2
NewportBeach
FountainValley
Santa Ana
Los Alamitos
Buena Park
Fullerton
Tustin
Garden Grove
La Habra Brea
Placentia Yorba Linda
AnaheimAnaheim
Orange
La Palma
Cypress
Westminster
Irvine
Stanton
VillaPark
CostaMesa
HuntingtonBeach
SealBeach
OCSD Service Area
396 miles of sewers
471 square miles
185 million gallons per day
2.6 million population
20 cities, 4 special districts
15 pumping stations
2 treatment plants
OCSD Mission
To protect public health and the environment by providing
effective wastewater collection, treatment, and recycling.
Wastewater Collection System
City Local SewerManhole
PrivateLateral
OCSDRegional Trunkline
OceanOutfallOCSDTreatmentPlants
Manhole
High Flow Color Code System
Preparation Phase: When one-inch of rainfall is forecasted
within three days or the upcoming weekend.
Threat Phase: When there is 125 million gallons a day (MGD)
over normal flow or 30 MGD over outfall flow; partial Incident
Command System (ICS) activated.
Storage Phase: Fill empty process storage tanks. Full ICS
activated.
Exceeding Capacity Phase: Evaluate use of backup outfalls,
prepare for potential spills in the collections system.
Recovery Phase: Drain and clean process units in
preparation for next storm.
Rain Event: January 18-22
RAINFALL
•Plant No. 1 in Fountain Valley—4.8 inches of rainfall
•Plant No. 2 in Huntington Beach—7.5 inches of rainfall
•Total—12.3 inches of rainfall
INFLUENT
•Plant No. 1 in Fountain Valley—273 MGD (Design 320 MGD)
•Plant No. 2 in Huntington Beach—313 MGD (Design 340 MGD)
•Total—586 MGD of influent (Design 660 MGD)
•Historic High Influent 550 MGD (January 1995)*
Rain Event: January 18-22
EFFLUENT
•503 MGD (Combined Plant 1 and 2)
•Primary Outfall Design –480 MGD
•Emergency Outfall Design –240 MGD
•Total Outfall Design Capacity –720 MGD
•Historic High Effluent 550 MGD (January 1995)*
STAFF
•Forty-three OCSD staff participated in preparing and
responding to this storm event.
INVESTMENT IN THE SYSTEM
•The Groundwater Replenishment System (GWRS)
treated peaks of 144 MGD.
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