Insight on the Non-Nutrient Portion of the Missouri Water Quality Standards Proposed Revisions Missouri Water Seminar REGFORM September 7, 2017 Rob Morrison, P.E. Barr Engineering Co. Jefferson City, MO 65109
Missouri’s Current Designated Uses [10 CSR 20-7.031(1)(C)] • Protection and Propagation of Fish, Shellfish, and Wildlife* – Warm Water Habitat – Cool Water Habitat *rebuttable presumption – Cold Water Habitat – Ephemeral Aquatic Habitat – Modified Aquatic Habitat – Limited Aquatic Habitat • Recreation in and on the Water* – Whole Body Contact A & B – Secondary Contact • Human Health Protection* – Consumption of Fish (only numeric criteria)
Missouri’s Designated Uses [10 CSR 20-7.031(1)(C)] • Irrigation + • Livestock and Wildlife Protection + + presumed use • Drinking Water Supply (not all waters have a DWS designation) • Industrial Water Supply • Storm and flood-water Storage Attenuation • Habitat for Resident and Migratory Wildlife Species • Recreational, Cultural, Educational, Scientific, and Natural Aesthetic Values • Hydrologic Cycle Maintenance
Water Quality Criteria (40 CFR 131.3, 131.11) • Narrative or Numeric – Numeric criteria must have a basis • Protect a designated use • Include: – Aquatic Life Criteria – Human Health Criteria – Biological Criteria – Nutrient Criteria 4
Numeric Criteria (40 CFR 131.11) Criteria must have a Basis • Numeric Criteria – 304(a) guidance • Aquatic Life Protection • Human Health Protection – Organism (Fish) Only – Organism (Fish) + Water – Max Contaminate Level (MCL) – 304(a) guidance to reflect site specific conditions (e.g. hardness dependent criteria) – Other Scientifically Defensible Methods
Current Missouri Water Quality Criteria [10 CSR 20-7.031(4), (5), and Table A, B1, B2, B3] • General Criteria [10 CSR 20 – 7.031 (4)] • Numeric Criteria [ 10 CSR 20 – 7.031 (5), Table A, B1, B2, B3] – Aquatic Life Protection – Human Health Protection (Fish Consumption Only) – Whole Body Contact Recreation (A/B) – Secondary Contact Recreation – Drinking Water Supply – Livestock and Wildlife Protection – Irrigation – Groundwater Protection
Change is Often Difficult and Shocking Significant * Unexpected
Missouri’s Proposed Changes to the Water Quality Standards Regulatory Impact Report Published July 24, 2017 • Waters of the State Definition Revised • Mixing Zones and Zones of Initial Dilution • Hardness • pH • General or Narrative Criteria Revisions • Antidegradation Implementation Procedure • Losing Stream Reference and Table J • Modifications to Table K, Site-Specific Criteria • Missouri Use Designation Dataset Update
Missouri’s Proposed Changes to the Water Quality Standards cont’d Regulatory Impact Report Published July 24, 2017 • Section 304(a) Criteria Adoption (includes org + water) • Numeric Nutrient Criteria for Lakes • Water Quality Standards Variances • Miscellaneous Text Revisions Comment period on the Regulatory Impact Report Extends through 5 pm, September 22, 2017
Missouri’s Proposed Adoption of USEPA 304(a) Criteria What’s included: • Alkalinity (minimum CaCO 3 ), Barium, Methylmercury, Total Chromium, Dinitrophenols, 3-Methyl-4-Chlorophenol, Nonylphenol, Carbaryl, Endosulfan Sulfate, and Technical Hexachlorocyclohexane • Sulfate and Chloride (reverts back to previously approved criteria) • Structural Changes to Table A (A1 – A4) • Inclusion of Default Values for Risk-based Calculations used for the Protection of Human Health • Adds of Organism + Water Criteria to the Human Health Protection Designated Use (no longer fish consumption only)
Missouri’s Proposed Adoption of USEPA 304(a) Criteria Specifically not included: • Aluminum • Cadmium (acute) • Manganese • Ammonia (2013 304a criteria) • Bacteria/Pathogens
Facilities or Permittees Affected by the Criteria Adoption Total Facilities 4841 Increase 1376 Decrease 477 Remain same 4839 Facilities by Type Site Specific 2676 General 1388 Stormwater 774 Underground Injection 3 Facilities Private/Public Private 3707 Public 1134 Effluent Limits Total effluent limits 14524
Criteria Changes and What’s the Impact Human Number of List of Parameters (as written in Aquatic Life Aquatic Life Health IRR/LW Permits per Table A1 Parameters (ug/L) CAS # HHP Org only DWS GRW permit) Protection- ac Protection- chr Protection o P parameter Previous limiting New limiting + w Criterion (ug/L) criterion (ug/L) Percent Change 5 0.55 -89.00% 1,1,2-Trichloroethane 79005 0.55 [42] 8.9 5 5 1,1,2-Trichloroethane 2 1,1-Dichloroethylene (Dichloroethane or 3.2 7 118.75% 1,1-Dichloroethylene 75354 300 [3.2] 20,000 7 7 DCE) 3 5 5 0.00% 1,2-Dichloroethane 107062 9.9 [99] 650 5 5 1,2-Dichloroethane 3 0.04 0.02 -50.00% 1,2-Diphenylhydrazine 122667 0.03 [0.54] 0.2 0.04 0.04 1,2-Diphenylhydrazine 1 2,3,7,8-Tetrachlorodibenzo-p-dioxin 5.00E-09 [1.4E-8] 5.1E- 1.30E-08 5.10E-09 -60.77% 1746016 1.3 E-08 1.3E-08 2,3,7,8-TCDD (Dioxin) 9 2,3,7,8-Tetrachlorodibenzo-p-dioxin 1 2,600 300 -88.46% 2,4,5-Trichlorophenol 95954 300 [9,800] 600 2,600 2600 2,4,5-Trichlorophenol 1 2 1.5 -25.00% 2,4,6-Trichlorophenol 88062 1.5 [6.5] 2.8 2 2 2,4,6-Trichlorophenol 14 7 10 42.86% 2,4-Dichlorophenol 120832 [7] 10 [790] 60 93 93 2,4-Dichlorophenol 1 540 100 -81.48% 2,4-Dimethylphenol 105679 100 [2,300] 3,000 540 540 2,4-Dimethylphenol 15 70 10 -85.71% 2,4-Dinitrophenol 51285 10 [14,000] 300 70 70 2,4-Dinitrophenol 14 0.11 0.049 -55.45% 2,4-Dinitrotoluene 121142 0.049 [9] 1.7 0.11 0.04 2,4-Dinitrotoluene 1 0.1 0.1 0.00% 2-Chlorophenol 95578 30 [400] 800 0.1 0.1 2-Chlorophenol 14 0.04 0.04 0.00% 3,3'-Dichlorobenzidine 91941 0.049 [0.08] 0.15 0.04 0.04 3,3'-Dichlorobenzidine 1 1200 70 -94.17% Acenaphthene 83329 70 [2,700] 90 1,200 1,200 Acenaphthene 15 0.058 0.058 0.00% Acrylonitrile (2-propenenitrile) 107131 0.061 [0.65] 7.0 0.058 0.058 Acrylonitrile 1 [0.000079] 0.000079 0.00000077 -99.03% Aldrin 309002 3 7.7E-07 0.00013 0.00013 0.00000077 Aldrin 1
Specific Examples Number Human of Aquatic Aquatic List of Parameters Health IRR Permits Table A1 Parameters Life Life HHP Org (as written in CAS # Protecti DWS /LW GRW per (ug/L) Protection Protection- only permit) on o + P paramet - ac chr w Previous New er limiting limiting Criterion criterion Percent (ug/L) (ug/L) Change 70 - 70 [2,700] 1,20 1200 Acenaphthene 83329 1,200 94.17% 90 0 Acenaphthene 15 Acrylonitrile 0.061 [0.65] 0.05 0.058 0.058 0.00% (2- 107131 7.0 0.058 8 propenenitrile) Acrylonitrile 1
Criteria Changes and What’s the Impact (cont’d) Human Number of List of Parameters (as written Previous New limiting Aquatic Life Aquatic Life Health IRR/L Permits per Table A1 Parameters (ug/L) CAS # HHP Org only DWS GRW in permit) limiting criterion Percent Protection- ac Protection- chr Protection o WP parameter Criterion (ug/L) (ug/L) Change + w [110,000] 9600 300 -96.88% Anthracene 120127 300 9,600 9,600 Anthracene 3 400 6 5.6 -6.67% Antimony 7440360 5.6 [4,300] 640 6 6 Antimony (Sb), total recoverable 41 20 0.018 -99.91% Arsenic 7440382 340 [20] 150 0.018 0.14 50 100 50 Arsenic, dissolved (as As) 1 20 0.018 -99.91% Arsenic 7440382 340 [20] 150 0.018 0.14 50 100 50 Arsenic, total (as As) 6 20 0.018 -99.91% Arsenic 7440382 340 [20] 150 0.018 0.14 50 100 50 Arsenic, total recoverable 78 2000 1000 -50.00% Barium 7440393 1,000 2,000 2,000 Barium, dissolved (as Ba) 1 2000 1000 -50.00% Barium 7440393 1,000 2,000 2,000 Barium, total (as Ba) 3 2000 1000 -50.00% 1,000 Barium 7440393 2,000 2,000 Barium, total recoverable 29 5 2.1 -58.00% 2.1 [71] 58 Benzene 71432 5 5 Benzene 60 5 2.1 -58.00% 2.1 [71] 58 Benzene 71432 5 5 Benzene, dissolved 1 [0.049] 0.044 0.0012 -97.27% Benzo-a-Anthracene 56553 0.0012 0.0044 0.0044 Benzo(a)anthracene 15 0.0013 [0.049] 0.049 0.00012 -99.76% Benzo-a-Pyrene 50328 0.00012 0.2 0.2 Benzo(a)pyrene 16 0.00013 [0.049] 0.049 0.012 -75.51% Benzo-k-Fluoranthene 205992 0.012 0.0044 0.0044 Benzo(k)fluoranthene 15 0.0013 [0.049] 0.049 0.0012 -97.55% Benzo-b-Fluoranthene 207089 0.0012 0.0044 0.0044 Benzo-b-Fluoranthene 0.013 4 4 0.00% Beryllium 7440417 [5] 4 100 4 Beryllium, total (as Be) 3 4 4 0.00% Beryllium 7440417 [5] 4 100 4 Beryllium, total recoverable 38 0.03 0.03 0.00% 0.03 [1.4] 2.2 Bis(2-Chloroethyl) Ether 111444 0.03 0.03 Bis(2-chloroethyl) ether 2 5.9 0.32 -94.58% 0.32 [5.9] 0.37 Bis(2-Ethylhexyl) Phthalate 117817 6 6 Bis(2-ethylhexyl) phthalate 3 Carbon Tetrachloride 5 0.4 -92.00% 56235 0.4 5 5 5 Carbon tetrachloride 1 (Tetrachloromethane)
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