Water, Wastewater and Recycled Water Community: Constituents of Emerging Concern Study Experience. September 30, 2009
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1 Water, Wastewater and Recycled Water Community: Constituents of Emerging Concern Study Experience September 30, 2009 Patrick Sheilds Executive Manager of Operations Inland Empire Utilities Agency (IEUA) 1
2 Chino Basin and IEUA Service Area Los Angeles County 2
3 IEUA Three Year Recycled Water Business Plan 50,000 AFY by ,000 AFY Direct 15,000 AFY GWR Drought Proof Regional Water Supply only new source of water Target replacement of potable water in public landscapes (schools, parks, streets) Acre Feet Per Year 60,000 50,000 40,000 30,000 20,000 10,000 FY06/07 FY07/08 FY08/09* FY09/10 (Goal) Actual RW Use FY10/11 (Goal) Projected RW Use FY11/12 (Goal) * FY08/09 Projected Actuals
4 CEC Monitoring Criteria Should Consider... Experience of existing monitoring programs/expert panels for CA GWR projects Research by Water Reuse Federation, Water Environment Research Foundation and Water Research Foundation 2008 CDPH CEC monitoring approach for GWR projects Case Studies: IEUA Chino Basin Groundwater Recharge Project: GWR project uses tertiary treated RW and Soil Aquifer Treatment (SAT) West Basin Seawater Intrusion Barrier Project: Injection project uses advanced treatment (MF/RO/ AOP) 4
5 IEUA Recycled Water Chino Basin Recharge Permit Issued 2005 (Phase I) & 2007 (Phase II) Monitoring Recycled Water, Diluent Water & Groundwater IEUA s Hickory Recharge Basin with Recycled Water & Lysimeters Conventional Pollutants Inorganic Chemicals Priority Pollutants CDPH-Specified MCL Chemicals CDPH-Specified Notification Level Chemicals CDPH-Specified Unregulated Chemicals Copper and Lead Action Levels 5
6 IEUA Recharge Permit: CEC Monitoring Recycled Water Based on 2004 CDPH Draft Regulations (Endnote 5) All can be analyzed by commercial labs except Morphine Nitrosomines Hormones Ethinyl estradiol 17-B estradiol Estrone Industrial EDCs Bisphenol A Nonylphenol & Nonylphenol polyethoxylate Octylphenol & Octylphenol polyethoxylate Polybrominated diphenyl ethers PhACs & Other Substances Acetaminophen Amoxicillin Azithromycin Caffeine Carbamazepine Ciprofloxacin EDTA Gemfibrozil Ibuprofen Iopromide Lipitor Methadone Morphine Salicylic acid Triclosan 6
7 Constituents Monitored in IEUA Recycled Water Regulated Chemicals 100% Permit Compliance Trihalomethanes & Haloacetic Acid compliance achieved at lysimeters after SAT Unregulated & Chemicals w/ State Notification Levels Chemical Results (ppb) NL (ppb) Boron ppm 1 ppm 1,2,3-Trichloropropane ND ,4-Dioxane ND 3 Chromium-6 ND n/a Dichlorodifluoromethane (Freon 12) ND 1000 Ethyl tert-butyl ether (ETBE) ND n/a Formaldehyde ND N-Nitroso dimethylamine (NDMA) 4-15 ppt 10 ppt tert-amyl methyl ether (TAME) ND n/a tert-butyl alcohol (TBA) ND Vanadium
8 CECs Monitored in IEUA Recycled Water Chemical Results (ppt) Ethinyl estradiol ND b estradiol ND - 10 Estrone ND - 91 Bisphenol A ND Nonylphenol and nonylphenol polyethoxylate ND Octylphenol and octylphenol polyethoxylate ND Polybrominated diphenyl ethers (PBDE) PBDE 99 ND - 3 PBDE 183 ND PBDE 203 ND PBDEs 17, 28, 71, 66, 85, 100, 154, 153, 138, 128, 190, 206, 209 ND Acetaminophen ND Caffeine ND - 67 Carbamazepine ND Ethylenediamine tetra-acetic acid (EDTA) ND* Gemfibrozil ND - 18 Ibuprofen ND Iodinated contrast media Methadone Predicted No Effect Level (Schwab Study 2005) = 5 ppm Salicylic acid ND - 63 Triclosan ND * Detection limit is 0.1 ppm ND 8
9 West Basin Barrier Project Two (2001 and 2007) Expert Panels to review increasing injection from 50% to 100% recycled water Used 8 labs: ELAP certified in-house lab + 7 outside labs More than 19,000 samples analyzed for barrier water only More than 30,000 analyses completed in-house and 4,500 subcontracted $600,000/year for barrier water alone Additional ongoing R&D 9
10 West Basin Monitored CECs with NLs Boron n-butylbenzene sec-butylbenzene tert-butylbenzene Carbon disulfide Chlorate 2-Chlorotoluene 4-Chlorotoluene Dichlorodifluoromethane (Freon 12) 1,4-Dioxane Ethylene glycol Formaldehyde HMX Isopropylbenzene Manganese Methyl isobutyl ketone (MIBK) Naphthalene N-Nitrosodiethyamine (NDEA) N-Nitrosodimethylamine (NDMA) N-Nitrosodi-n-propylamine (NDPA) Propachlor n-propylbenzene RDX Tertiary butyl alcohol (TBA) 1,2,3-Trichloropropane (1,2,3- TCP) 1,2,4-Trimethylbenzene 1,3,5-Trimethylbenzene 2,4,6-Trinitrotoluene (TNT) Vanadium 10
11 West Basin Monitored CECs Unregulated Contaminant Monitoring Regulations (UCMR) CECs (From: 2004 CDPH Draft GWR Regulations) Acetaminophen 17-b Estradiol 17-a Ethynylestradiol Estrone Bisphenol A Caffeine Gemfibrozil Ibuprofen Triclosan PBDE 100 PBDE 153 PBDE 154 PBDE 47 11
12 West Basin Barrier Product Water CECs all Non Detect Except: Constituents with NLs Chlorate < NL NDEA < NL NDMA < NL Formaldehyde Avg < NL / some samples > NL Expert panel recommendation to study this compound and issue report by 2010 Other Constituents PDBE-154 Detection Level 12
13 CDPH Current Thinking On CEC Monitoring 2004 Endnote 5 recommended compounds based on questions raised at public hearings August 2008 approach more strategic - specific CECs will vary among projects depending on: Type of project Type of treatment Characteristics of groundwater basins Project sponsor s efforts to address PhACs, EDCs, and personal care products in their recycled water Monitoring only informational 13
14 2008 West Basin Expert Panel List of CECs Mostly concerned about an early warning of a breach of treatment system: Selection Criteria: 1. Molecular weight 2. Water solubility 3. Hydrophobicity/Ionogenicity 4. Occurrence in secondary wastewater 5. Removal by MF 6. Removal by RO 7. Removal by AOP 8. Availability of analytical method w/ standards 14
15 2008 West Basin Expert Panel Recommended CECs Atrazine Boron Carbamazepine DEET 1,4-Dioxane Estrone Gemfibrozil Iopromide Meprobamate Phenytoin Sulfamethoxazole TCEP 15
16 Suggested Selection Criteria for CECs Must be present in recycled water Must be detectable Must have a reliable analytical method w/ method standard to have reliable results Seen different results using different labs Selection should consider type of treatment & application Compounds for SAT will differ from those for AWT Should be representative of different CEC categories PhACs used may change over time need to revisit Detection health effects If a constituent is detected, it is helpful for public outreach to be able to speak to its health effects 16
17 Thank You! Storm Water Questions? Recycled Water Imported Water Maximizing Recharge 17
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