OCSD and 1,4-Dioxane Presented by: Mark Kawamoto, P.E. Orange - PowerPoint PPT Presentation

Nov 13, 2023 •8 likes •98 views

OCSD and 1,4-Dioxane Presented by: Mark Kawamoto, P.E. Orange County Sanitation District COLLECTIONS SERVICE AREA Area: 479 square miles Population: 2.6 million North & Central Orange County Cities: 20 TWO

OCSD and 1,4-Dioxane Presented by: Mark Kawamoto, P.E. Orange County Sanitation District
COLLECTIONS SERVICE AREA • Area: 479 square miles • Population: 2.6 million • North & Central Orange County • Cities: 20 TWO FACILITIES • Reclamation Plant No. 1 in Fountain Valley 115 - 130 MGD • Treatment Plant No. 2 in Huntington Beach 65 - 85 MGD
AREAS SERVED • Area: 2,840 sq. mi. • Population: 5.97 million (2010) • Counties: Orange, Riverside, San Bernardino, Los Angeles • Cities: 58
Groundwater Replenishment System
Managing Sources of Pollutants Before They Enter the Sewer Industrial Sources Industrial Users Nonindustrial Sources • Cities Household Users • Utilities • Community Programs Commercial Users
1 5 6 4 7 2 8 3
Sources • Used in the production of pharmaceuticals, pesticides, paper, magnetic tapes, textiles, adhesives, and membranes for gas and liquid separation • Found in automotive coolant liquid, paints, varnishes, shampoos, cosmetics
Local Limits, mg/L Wastehauler Limits, mg/L Pollutants of Concern Basis New/ New/ Existing Existing Amended Amended BOD Mass Allocation 15,000 lb/d - - - - - - TP2 Design Criteria Ammonia Mass Allocation - - - - - - - - - WQBEL Ocean Outfall RP1 2 ° Inhibition Chromium (Total) 20.0 2.0 35.0 2.0 Technical Silver 15.0 5.0 - - - - - - WQBEL Ocean Outfall Arsenic 2.0 2.0 - - - - - - RP1 Biosolids Evaluation Cadmium 1.0 1.0 1.0 1.0 RP1 Biosolids Copper 3.0 3.0 25.0 25.0 RP1 Biosolids Lead 2.0 2.0 10.0 10.0 RP1 Biosolids of Local Mercury 0.03 0.03 - - - - - - RP1 Biosolids Nickel 10.0 10.0 10.0 10.0 RP1 Biosolids Limits Zinc 10.0 10.0 50.0 50.0 RP1 Biosolids Molybdenum 2.3 - - - - - - - - - RP1 Biosolids Selenium 3.9 - - - - - - - - - RP1 Biosolids 1,4-Dioxane 1.0 - - - - - - - - - GWRS Influent Total Toxic Organics - - - 0.58 - - - - - - Toxicity GWRS Product RP1 2 ° Inhibition Cyanide (Amenable) - - - 1.0 - - - - - - RP1 2 ° Inhibition Cyanide (Total) 5.0 5.0 - - - - - - Petroleum O&G 100.0 100.0 - - - - - - Sewer Interference Total Sulfides 5.0 5.0 - - - - - - Sewer Interference Dissolved Sulfides 0.5 0.5 - - - - - - Sewer Interference pH 6.0 - 12.0 6.0 - 12.0 6.0 - 12.0 6.0 - 12.0 Sewer Interference PCBs 0.01 0.01 - - - - - - Toxicity Pesticides 0.01 0.01 - - - - - - Toxicity
Summary • Thank you for your help • Small quantities add up, so small changes can have significant impacts

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