COMPLIANCE INFO_REV.4TH QTR-ANNUAL REPORT 6/26/2025

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Appendix D. Cumulative Historical Data for the Past Year Sample ID Sample Date Parameter Result Lab Result (numeric)Lab Limit Lab Unit Detect Method 8106 AUSTIN RD 9/11/2024 cis-1,3-Dichloropropene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 9/11/2024 trans-1,3-Dichloropropene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Ethanol <250 ND 250 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Benzene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Chloromethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Methyl Iodide <2 ND 2 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Dibromomethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Bromochloromethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Bromoform <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Bromodichloromethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,1-Dichloroethane 0.14 J 0.14 0.5 ug/L Yes 8260B 8106 AUSTIN RD 11/22/2024 1,1-Dichloroethene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 tert-Butyl Alcohol <10 ND 10 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Isobutyl Alcohol <20 ND 20 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,1,2-Trichloroethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,1,2,2-Tetrachloroethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Hexachlorobutadiene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,2-Dichlorobenzene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,2-Dibromo-3-Chloropropane <1 ND 1 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Ethyl Methacrylate <4 ND 4 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,4-Dichlorobenzene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Allyl Chloride <5 ND 5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Propionitrile <20 ND 20 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Acrylonitrile <5 ND 5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Vinyl acetate <10 ND 10 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 4-Methyl-2-Pentanone <10 ND 10 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,2,4-Trichlorobenzene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Dibromochloromethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Methacrylonitrile <10 ND 10 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 2-Chloro-1,3-Butadiene <5 ND 5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Tetrachloroethene 5.9 5.9 0.5 ug/L Yes 8260B 8106 AUSTIN RD 11/22/2024 cis-1,2-Dichloroethene 0.16 J 0.16 0.5 ug/L Yes 8260B 8106 AUSTIN RD 11/22/2024 1,3-Dichlorobenzene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 2-Hexanone <10 ND 10 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 2,2-Dichloropropane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,1,1,2-Tetrachloroethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Ethyl-t-Butyl Ether <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Tert-Amyl-Methyl Ether <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Xylenes, Total <1 ND 1 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 cis-1,3-Dichloropropene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 trans-1,3-Dichloropropene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Carbonate <2.5 ND 2.5 mg/L No 310.1 8106 AUSTIN RD 11/22/2024 Calcium, Dissolved 82 82 0.1 mg/L Yes 6010B 8106 AUSTIN RD 11/22/2024 Magnesium, Dissolved 42 42 0.05 mg/L Yes 6010B 8106 AUSTIN RD 11/22/2024 Sodium, Dissolved 39 39 1 mg/L Yes 6010B 8106 AUSTIN RD 11/22/2024 Bicarbonate 400 400 5 mg/L Yes 310.1 8106 AUSTIN RD 11/22/2024 Nitrogen, Nitrate 3.7 3.7 0.1 mg/L Yes 300. 8106 AUSTIN RD 11/22/2024 Sulfate 40 40 1 mg/L Yes 300. 8106 AUSTIN RD 11/22/2024 Carbon tetrachloride <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Acetone <10 ND 10 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Chloroform <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,1,1-Trichloroethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Bromomethane <1 ND 1 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Chloroethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Vinyl Chloride <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Acetonitrile <10 ND 10 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Methylene Chloride <1 ND 1 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Carbon Disulfide <1 ND 1 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Trichlorofluoromethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Dichlorodifluoromethane 0.52 0.52 0.5 ug/L Yes 8260B 8106 AUSTIN RD 11/22/2024 1,2-Dichloropropane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 2-Butanone <10 ND 10 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Trichloroethene 1.3 1.3 0.5 ug/L Yes 8260B 8106 AUSTIN RD 11/22/2024 Naphthalene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,2,3-Trichloropropane <0.005 ND 0.005 ug/L No 524.2 8106 AUSTIN RD 11/22/2024 1,2,3-Trichloropropane <1 ND 1 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Ethylbenzene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Styrene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,2-Dibromoethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Acrolein <10 ND 10 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,2-Dichloroethane <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Diisopropyl Ether <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Toluene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Chlorobenzene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Trans-1,4-Dichloro-2-Butene <5 ND 5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 trans-1,2-Dichloroethene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 1,1-Dichloropropene <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 MTBE <0.5 ND 0.5 ug/L No 8260B 8106 AUSTIN RD 11/22/2024 Chloride 39 39 0.5 mg/L Yes 300. 8106 AUSTIN RD 11/22/2024 Potassium, Dissolved 7.7 7.7 1 mg/L Yes 6010B 8106 AUSTIN RD 11/22/2024 Strontium 870 870 10 ug/L Yes 6010B Page 33 of 659