COMPLIANCE INFO_Q3 2025 MONITORING REPORT 10-30-25

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Appendix D - Cumulative Historical Data for the Past Year EW-3 8/8/2025 2-Butanone <10 ND 10 μg/L ug/L No 8260B EW-3 8/8/2025 Methyl Iodide <2 ND 2 μg/L ug/L No 8260B EW-3 8/8/2025 4-Methyl-2-Pentanone <10 ND 10 μg/L ug/L No 8260B EW-3 8/8/2025 Vinyl acetate <10 ND 10 μg/L ug/L No 8260B EW-3 5/23/2025 Chloride 80 80 0.5 mg/L mg/L Yes 300 EW-3 5/23/2025 Nitrogen, Nitrate 8.5 8.5 0.1 mg/L mg/L Yes 300 EW-3 5/23/2025 Sulfate 53 53 1 mg/L mg/L Yes 300 EW-3 8/8/2025 Chloride 110 110 0.5 mg/L mg/L Yes 300 EW-3 8/8/2025 Nitrogen, Nitrate 9.1 9.1 0.1 mg/L mg/L Yes 300 EW-3 8/8/2025 Sulfate 57 57 1 mg/L mg/L Yes 300 EW-3 5/23/2025 Solids, Total Dissolved 583 583 10 mg/L mg/l Yes 2540C EW-3 5/23/2025 1,2,3-Trichloropropane 0.012 0.012 0.005 μg/L ug/L Yes 524.2 EW-3 8/8/2025 Solids, Total Dissolved 609 609 13.3 mg/L mg/l Yes 2540C EW-3 8/8/2025 1,2,3-Trichloropropane 0.028 0.028 0.005 μg/L ug/L Yes 524.2 EW-3 Dup 8/9/2024 Allyl Chloride <5.0 ND 5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Tert-Amyl-Methyl Ether <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 tert-Butyl Alcohol <10 ND 10 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Carbon Disulfide <1.0 ND 1 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 2-Chloro-1,3-Butadiene <5.0 ND 5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Trans-1,4-Dichloro-2-Butene <5.0 ND 5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Diisopropyl Ether <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Ethanol <250 ND 250 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Ethyl Methacrylate <4.0 ND 4 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Ethyl-t-Butyl Ether <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 2-Hexanone <10 ND 10 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Isobutyl Alcohol <20 ND 20 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Methacrylonitrile <10 ND 10 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 2-Butanone <10 ND 10 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Methyl Iodide <2.0 ND 2 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 4-Methyl-2-Pentanone <10 ND 10 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Propionitrile <20 ND 20 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Vinyl acetate <10 ND 10 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Benzene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Bromochloromethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Bromodichloromethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Bromoform <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Bromomethane <1.0 ND 1 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Carbon tetrachloride 6.8 6.8 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 Chlorobenzene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Chloroethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Chloroform 2.2 2.2 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 Chloromethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Dibromochloromethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,2-Dibromo-3-Chloropropane <1.0 ND 1 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,2-Dibromoethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Dibromomethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,2-Dichlorobenzene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,3-Dichlorobenzene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,4-Dichlorobenzene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Dichlorodifluoromethane 0.64 0.64 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 1,1-Dichloroethane 0.65 0.65 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 1,2-Dichloroethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,1-Dichloroethene 0.21 J 0.21 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 cis-1,2-Dichloroethene 0.24 J 0.24 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 trans-1,2-Dichloroethene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,2-Dichloropropane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 2,2-Dichloropropane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,1-Dichloropropene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 cis-1,3-Dichloropropene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 trans-1,3-Dichloropropene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Ethylbenzene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Hexachlorobutadiene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Methylene Chloride <1.0 ND 1 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 MTBE <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Naphthalene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Styrene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,1,1,2-Tetrachloroethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,1,2,2-Tetrachloroethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Tetrachloroethene 7.1 7.1 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 Toluene 9 9 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 1,2,4-Trichlorobenzene <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,1,1-Trichloroethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 1,1,2-Trichloroethane <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Trichloroethene 2.6 2.6 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 Trichlorofluoromethane 0.17 J 0.17 0.5 μg/L ug/L Yes 8260B EW-3 Dup 8/9/2024 1,2,3-Trichloropropane <1.0 ND 1 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Vinyl Chloride <0.50 ND 0.5 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Xylenes, Total <1.0 ND 1 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Acetone <10 ND 10 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Acetonitrile <10 ND 10 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Acrolein <10 ND 10 μg/L ug/L No 8260B EW-3 Dup 8/9/2024 Acrylonitrile <5.0 ND 5 μg/L ug/L No 8260B EW-3R 8/14/2024 cis-1,2-Dichloroethene 0.13 J 0.13 0.5 μg/L ug/L Yes 8260B