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Home My WebLink About20252685.tiffChevron %O. 1110 RECEIVED SEP 2 2 2025 WELD COUNTY COMMISSIONERS Since 2012, Chevron affiliates have reported any chemicals used in our oil and gas wells on FracFocus.org. As required under Colorado Revised Statues (C.R.S.) 34-60-132, oil and gas operators must now also disclose these chemicals directly to certain people and entities near well locations. The attached Chemical Disclosure List provides a summary of the products used as part of our operations. Further information about our company and operations can be found at colorado.chevron.com. For more information about the chemicals listed, we encourage you to visit FracFocus.org. For questions, please contact 303-318-6100 or coloradoinfo@chevron.com Desde 2012, las filiales de Chevron han informado las caracteristicas de cualquier producto quimico utilizado en nuestros pozos de petrOleo y gas en FracFocus.org. Segun to requerido por los Estatutos Revisados de Colorado (C.R.S.) 34-60-132, los operadores de petrOleo y gas ahora tambien deben divulgar dichas caracteristicas directamente a ciertas personas y entidades cercanas a las ubicaciones de los pozos. La Lista de DivulgaciOn de Productos Quimicos adjunta proporciona un resumen de los productos utilizados como parte de nuestras operaciones. Se puede encontrar mas informacion sobre nuestra empresa y operaciones en colorado.chevron.com. Para obtener mas informaciOn sobre los quimicos enumerados, le recomendamos visitar FracFocus.org. Para responder a preguntas, por favor flame al 303-318-6100 o envie un e-mail a coloradoinfo@chevron.com. Co Mt -N. ; GO. -f- ; o n S oq /29 /25 2025-2685 Chemical Disclosure Rev 5/24 State of Colorado Energy & Carbon Management Commission 1120 Lincoln Street, Suite 801, Denver, CO 80203 Phone, Suite 801, Denver, CO 80203 CHEMICAL DISCLOSURE LIST Colorado Revised Statutes (C.R.S.) 34-60-132 requires oil and gas operators in Colorado to disclose the chemicals used in downhole operations to certain persons and entities near their downhole operations. Operators report chemical products used in downhole operations to the ECMC on a location -by -location basis. Information provided by Chemical Manufacturers and the oil and gas operator is aggregated by the ECMC into a chemical disclosure list for release to the public. Chemicals are reported on the list alphabetically and include each chemical's Chemical Abstracts Service Number (CAS Number) as assigned by the Chemical Abstracts Service. Pursuant to C.R.S. 34-60-132, Operators must provide the chemical disclosure list to the interested parties defined in the law within 30 days after receipt of the chemical disclosure list from the ECMC. Chemical Disclosures Location: 465146 I Rio Lc Pad Operator: 69175 I Pdc Energy Inc County: Adams Lat/Long: 39.999577/-104.9401 Chemical Name CAS Number 1-(1-Naphthylmethyl)Quinolinium Chloride 2-Propanol 2-Propenoic Acid, Ammonium Salt 2-Propenoic Acid, Ammonium Salta (1:1), Polymer With 2-Propenamide Acetic Acid Acetophenone Acrylamide Alcohol, C11-14, Ethoxylated Alcohols, (C10-16), Ethoxylated Alcohols, C12-14, Ethoxylated Alcohols, C12-16, Ethoxylated Alkyl Oxirane Polymer Chlorine Dioxide Chlorous Acid, Sodium Salt Cinnamaldehyde Citric Acid Dipropylene Glycol Methyl Ether Disodium Ethylene Diamine Tetra Acetate (Impurity) 65322-65-8 67-63-0 10604-69-0 26100-47-0 64-19-7 98-86-2 79-06-1 78330-21-9 68002-97-1 68439-50-9 68551-12-2 64366-70-7 10049-04-4 7758-19-2 104-55-2 77-92-9 34590-94-8 139-33-3 8/19/2025 - 9:46 AM Page 1 of 2 Chemical Name CAS Number Dye Chinoline Ylw Ss Solv 33 Dr400 Ethylene Glycol Formaldehyde Formic Acid Hydrochloric Acid Hydrotreated Light Petroleum Distillate Methanol Oxygenate And Paraffinic Stream Polyacrylamide Polyalkylene Glycol Reaction Product Of: Acetophenone, Formaldehyde, Cyclohexylamine, Methanol And Acetic Acid Sodium Bisulfite Sodium Chlorate Sodium Chloride Solvent Blue 35 Sorbitan, Mono-9-Octadecenoate, (Z) Thiourea -Formaldehyde Copolymer Water 8003-22-3 107-21-1 50-00-0 64-18-6 7647-01-0 64742-47-8 67-56-1 876065-86-0 9003-05-8 52624-57-4 224635-63-6 7631-90-5 7775-09-9 7647-14-5 17354-14-2 1338-43-8 68527-49-1 7732-18-5 8/19/2025 - 9:46 AM Page 2 of 2 Chemical Disclosure Rev 5/24 State of Colorado Energy & Carbon Management Commission 1120 Lincoln Street, Suite 801, Denver, CO 80203 C Phone, Suite 801, Denver, CO 80203 CHEMICAL DISCLOSURE LIST Colorado Revised Statutes (C.R.S.) 34-60-132 requires oil and gas operators in Colorado to disclose the chemicals used in downhole operations to certain persons and entities near their downhole operations. Operators report chemical products used in downhole operations to the ECMC on a location -by -location basis. Information provided by Chemical Manufacturers and the oil and gas operator is aggregated by the ECMC into a chemical disclosure list for release to the public. Chemicals are reported on the list alphabetically and include each chemical's Chemical Abstracts Service Number (CAS Number) as assigned by the Chemical Abstracts Service. Pursuant to C.R.S. 34-60-132, Operators must provide the chemical disclosure list to the interested parties defined in the law within 30 days after receipt of the chemical disclosure list from the ECMC. Chemical Disclosures Location: 459220 I Y07-03 PAD Operator 100322 I Noble Energy Inc County: Weld Lat/Long: 40.15808/-104.59603 Chemical Name CAS Number 1-Propanaminium, 3-Amino-N-(Carboxymethyl)-N,N-Dimethyl-, N -Coco Acyl 61789-40-0 Derivs., Inner Salts 2-Propenoic Acid, Ammonium Salt 10604-69-0 2-Propenoic Acid, Ammonium Salte (1:1), Polymer With 2-Propenamide 26100-47-0 2-Propyn-1-OI, Compd. With 2-Methyloxirane (1:?) 38172-91-7 Acrylamide 79-06-1 Acrylamide, Sodium Acrylate Polymer 25987-30-8 Alcohols, (C10-16), Ethoxylated 68002-97-1 Alcohols, C12 -14 -Secondary, Ethoxylated 84133-50-6 Alcohols, C12-16, Ethoxylated 68551-12-2 Alcohols, C14-15, Ethoxylated 68951-67-7 Ammonium Chloride 12125-02-9 Ammonium Sulfate 7783-20-2 Chlorine Dioxide 10049-04-4 Chlorous Acid, Sodium Salt 7758-19-2 Citral 5392-40-5 Diolamine 111-42-2 Ethanol 64-17-5 Ethox Co -30 - Ts 61791-12-6 8/19/2025 - 9:50 AM Page 1 of 2 Chemical Name CAS Number Ethylene Oxide Fatty Acid, Tall -Oil Hydrochloric Acid Hydrogenated Tallow Amine Hydrotreated Light Petroleum Distillate Methanesulfonic Acid Methanol Monoethanolamine Oleic Acid Diethanolamide Polyacrylamide Polyoxyethylene Monoleate Potassium Iodide Propargyl Alcohol Sodium Bisulfite Sodium Chlorate Sodium Chloride Sodium Perborate Tetrahydrate Sorbitan, Mono-9-Octadecenoate, (Z) Sorbitol Diethoxylated Tetraoleate 8-Alanine, N-(2-Carboxyethyl)-N-Dodecyl-, Sodium Salt (1:1) Tall Oil Acid Diethanolamide Thiourea -Formaldehyde Copolymer Water 75-21-8 61790-12-3 7647-01-0 61791-26-2 64742-47-8 75-75-2 67-56-1 141-43-5 93-83-4 9003-05-8 9004-96-0 7681-11-0 107-19-7 7631-90-5 7775-09-9 7647-14-5 10486-00-7 1338-43-8 61723-83-9 14960-06-6 68155-20-4 68527-49-1 7732-18-5 8/19/2025 - 9:50 AM Page 2 of 2 Chemical Disclosure Rev 5/24 State of Colorado Energy & Carbon Management Commission 1120 Lincoln Street, Suite 801, Denver, CO 80203 Phone, Suite 801, Denver, CO 80203 CHEMICAL DISCLOSURE LIST Colorado Revised Statutes (C.R.S.) 34-60-132 requires oil and gas operators in Colorado to disclose the chemicals used in downhole operations to certain persons and entities near their downhole operations. Operators report chemical products used in downhole operations to the ECMC on a location -by -location basis. Information provided by Chemical Manufacturers and the oil and gas operator is aggregated by the ECMC into a chemical disclosure list for release to the public. Chemicals are reported on the list alphabetically and include each chemical's Chemical Abstracts Service Number (CAS Number) as assigned by the Chemical Abstracts Service. Pursuant to C.R.S. 34-60-132, Operators must provide the chemical disclosure list to the interested parties defined in the law within 30 days after receipt of the chemical disclosure list from the ECMC. Chemical Disclosures Location: 482393 I Hen 4N64W8 1-22 Operator: 69175 I Pdc Energy Inc County: Weld Lat/Long: 40.328415/-104.57234 Chemical Name CAS Number 2-Propanol 2-Propenoic Acid, Ammonium Salt 2-Propenoic Acid, Ammonium Salte (1:1), Polymer With 2-Propenamide Acrylamide Alcohols, (C10-16), Ethoxylated Alcohols, C12-14, Ethoxylated Alcohols, C12-16, Ethoxylated Alkyl Oxirane Polymer Calcium Chlorine Dioxide Chlorous Acid, Sodium Salt Cinnamaldehyde Citric Acid Dipropylene Glycol Methyl Ether Disodium Ethylene Diamine Tetra Acetate (Impurity) Dye Chinoline Ylw Ss Solv 33 Dr400 Ethylene Glycol Formic Acid 67-63-0 10604-69-0 26100-47-0 79-06-1 68002-97-1 68439-50-9 68551-12-2 64366-70-7 7440-70-2 10049-04-4 7758-19-2 104-55-2 77-92-9 34590-94-8 139-33-3 8003-22-3 107-21-1 64-18-6 8/19/2025 - 9:44 AM Page 1 of 2 Chemical Name CAS Number Hydrochloric Acid Hydrotreated Light Petroleum Distillate Magnesium Chloride Hexahydrate Oxygenate And Paraffinic Stream Polyacrylamide Polyalkylene Glycol Potassium Sodium Bisulfite Sodium Chlorate Sodium Chloride Solvent Blue 35 Sorbitan, Mono-9-Octadecenoate, (Z) Thiourea -Formaldehyde Copolymer Water 7647-01-0 64742-47-8 7791-18-6 876065-86-0 9003-05-8 52624-57-4 7440-09-7 7631-90-5 7775-09-9 7647-14-5 17354-14-2 1338-43-8 68527-49-1 7732-18-5 8/19/2025 - 9:44 AM Page 2 of 2 Chemical Disclosure Rev 5/24 State of Colorado Energy & Carbon Management Commission 1120 Lincoln Street, Suite 801, Denver, CO 80203 Phone, Suite 801, Denver, CO 80203 CHEMICAL DISCLOSURE LIST Colorado Revised Statutes (C.R.S.) 34-60-132 requires oil and gas operators in Colorado to disclose the chemicals used in downhole operations to certain persons and entities near their downhole operations. Operators report chemical products used in downhole operations to the ECMC on a location -by -location basis. Information provided by Chemical Manufacturers and the oil and gas operator is aggregated by the ECMC into a chemical disclosure list for release to the public. Chemicals are reported on the list alphabetically and include each chemical's Chemical Abstracts Service Number (CAS Number) as assigned by the Chemical Abstracts Service. Pursuant to C.R.S. 34-60-132, Operators must provide the chemical disclosure list to the interested parties defined in the law within 30 days after receipt of the chemical disclosure list from the ECMC. Chemical Disclosures Location: 459738 I H01-14 PAD Operator: 100322 I Noble Energy Inc County: Weld Lat/Long: 40.24798/-104.61181 Chemical Name CAS Number 1,2,4-Trimethylbenzene Acrylamide, Sodium Acrylate Polymer Alcohols, C14-15, Ethoxylated, Ammonium Chloride Chlorine Dioxide Chlorous Acid, Sodium Salt Diolamine Ethanol Ethox Co -30 - Ts Fatty Acid, Tall -Oil Formaldehyde, Polymer With 2-Methyloxirane, 4-NonyLPhenol And Oxirane 95-63-6 25987-30-8 68951-67-7 12125-02-9 10049-04-4 7758-19-2 111-42-2 64-17-5 61791-12-6 61790-12-3 63428-92-2 Formaldehyde, Polymer With 4-(1,1-Dimethylethyl)Phenol And 2-Methyloxirane 29316-47-0 Heavy Aromatic Petroleum Naphtha Hydrochloric Acid Hydrotreated Light Petroleum Distillate Methanol Naphthalene Oleic Acid Diethanolamide 64742-94-5 7647-01-0 64742-47-8 67-56-1 91-20-3 93-83-4 8/19/2025 - 9:50 AM Page 1 of 2 Chemical Name CAS Number Poly(Oxy-1,2-Ethanediyl), ALPha-(4-NonyLPhenyl)-Omega-Hydroxy-, Branched 127087-87-0 Polyacrylamide Propargyl Alcohol Sodium Chlorate Sodium Chloride Sodium Metaborate Sodium Perborate Tetrahydrate Sorbitan, Mono-9-Octadecenoate, (Z) Tetrasodium Ethylenediaminetetraacetate Thiourea -Formaldehyde Copolymer Water 9003-05-8 107-19-7 7775-09-9 7647-14-5 10555-76-7 10486-00-7 1338-43-8 64-02-8 68527-49-1 7732-18-5 8/19/2025 - 9:50 AM Page 2 of 2 Chemical Disclosure Rev 5/24 State of Colorado Energy & Carbon Management Commission 1120 Lincoln Street, Suite 801, Denver, CO 80203 Phone, Suite 801, Denver, CO 80203 CHEMICAL DISCLOSURE LIST Colorado Revised Statutes (C.R.S.) 34-60-132 requires oil and gas operators in Colorado to disclose the chemicals used in downhole operations to certain persons and entities near their downhole operations. Operators report chemical products used in downhole operations to the ECMC on a location -by -location basis. Information provided by Chemical Manufacturers and the oil and gas operator is aggregated by the ECMC into a chemical disclosure list for release to the public. Chemicals are reported on the list alphabetically and include each chemical's Chemical Abstracts Service Number (CAS Number) as assigned by the Chemical Abstracts Service. Pursuant to C.R.S. 34-60-132, Operators must provide the chemical disclosure list to the interested parties defined in the law within 30 days after receipt of the chemical disclosure list from the ECMC. Chemical Disclosures Location: 482559 I Broe Fd Pad Operator: 69175 I Pdc Energy Inc County: Weld Lat/Long: 40.45041/-104.864044 Chemical Name CAS Number 2-Propanol 67-63-0 2-Propenoic Acid, Ammonium Salt 10604-69-0 2-Propenoic Acid, Ammonium Salte (1:1), Polymer With 2-Propenamide 26100-47-0 Acrylamide 79-06-1 Alcohols, (C10-16), Ethoxylated 68002-97-1 Alcohols, C12-14, Ethoxylated 68439-50-9 Alcohols, C12-16, Ethoxylated 68551-12-2 Alkyl Oxirane Polymer 64366-70-7 Boron Sodium Oxide Tetrahydrate 12280-03-4 Calcium 7440-70-2 Cellulase 9012-54-8 Chlorine Dioxide 10049-04-4 Chlorous Acid, Sodium Salt 7758-19-2 Choline Chloride 67-48-1 Cinnamaldehyde 104-55-2 Citric Acid 77-92-9 Diatomaceous Silica 7631-86-9 Dipropylene Glycol Methyl Ether 34590-94-8 8/19/2025 - 9:43 AM Page 1 of 2 Chemical Name CAS Number Disodium Ethylene Diamine Tetra Acetate (Impurity) Dye Chinoline Ylw Ss Solv 33 Dr400 Ethylene Glycol Formic Acid Guar Gum Hemicellulase Enzyme Hydrochloric Acid Hydrotreated Light Petroleum Distillate Magnesium Chloride Hexahydrate Oxygenate And Paraffinic Stream Polyacrylamide Polyalkylene Glycol Potassium Propylene Carbonate Propylene Glycol Quaternium 18-Bentonite Silicon Dioxide Sodium Bisulfite Sodium Chlorate Sodium Chloride Sodium Hydroxide Solvent Blue 35 Sorbitan Monolaurate Sorbitan, Mono-9-Octadecenoate, (Z) Sucrose Tert-Butyl Hydroperoxide Thiourea -Formaldehyde Copolymer Water 139-33-3 8003-22-3 107-21-1 64-18-6 9000-30-0 9025-56-3 7647-01-0 64742-47-8 7791-18-6 876065-86-0 9003-05-8 52624-57-4 7440-09-7 108-32-7 57-55-6 1340-69-8 14808-60-7 7631-90-5 7775-09-9 7647-14-5 1310-73-2 17354-14-2 1338-39-2 1338-43-8 57-50-1 75-91-2 68527-49-1 7732-18-5 8/19/2025 - 9:43 AM Page 2 of 2 Chemical Disclosure Rev 5/24 State of Colorado Energy & Carbon Management Commission 1120 Lincoln Street, Suite 801, Denver, CO 80203 Phone, Suite 801, Denver, CO 80203 CHEMICAL DISCLOSURE LIST Colorado Revised Statutes (C.R.S.) 34-60-132 requires oil and gas operators in Colorado to disclose the chemicals used in downhole operations to certain persons and entities near their downhole operations. Operators report chemical products used in downhole operations to the ECMC on a location -by -location basis. Information provided by Chemical Manufacturers and the oil and gas operator is aggregated by the ECMC into a chemical disclosure list for release to the public. Chemicals are reported on the list alphabetically and include each chemical's Chemical Abstracts Service Number (CAS Number) as assigned by the Chemical Abstracts Service. Pursuant to C.R.S. 34-60-132, Operators must provide the chemical disclosure list to the interested parties defined in the law within 30 days after receipt of the chemical disclosure list from the ECMC. Chemical Disclosures Location: 449918 I Beebe -Spur -Everest - Harvard 6N66W34 1-55 Operator: 69175 I Pdc Energy Inc County: Weld Lat/Long: 40.450684/-104.76362 Chemical Name CAS Number 1-Propanaminium, 3-Amino-N-(Carboxymethyl)-N,N-Dimethyl-, N -Coco Acyl 61789-40-0 Derivs., Inner Salts 2-Butoxyethanol 111-76-2 2-Propanol 67-63-0 2-Propenoic Acid, Ammonium Salt 10604-69-0 2-Propenoic Acid, Ammonium Salte (1:1), Polymer With 2-Propenamide 26100-47-0 2-Propyn-1-OI, Compd. With 2-Methyloxirane (1:?) 38172-91-7 Acrylamide 79-06-1 Alcohols, (C10-16), Ethoxylated 68002-97-1 Alcohols, C12-14, Ethoxylated 68439-50-9 Alcohols, C12-15 Linear, Ethoxylated 68131-39-5 Alcohols, C12-16, Ethoxylated 68551-12-2 Alkyl Oxirane Polymer 64366-70-7 Bentonite 1302-78-9 Boron Sodium Oxide Tetrahydrate 12280-03-4 Calcium 7440-70-2 Cellulase 9012-54-8 Chlorine Dioxide 10049-04-4 8/19/2025 - 9:52 AM Page 1 of 3 Chemical Name CAS Number Chlorous Acid, Sodium Salt Choline Chloride Cinnamaldehyde Citral Citric Acid Diatomaceous Silica Dipropylene Glycol Methyl Ether Disodium Ethylene Diamine Tetra Acetate (Impurity) Distillates (Petroleum), Hydrotreated Light Naphthenic Dye Chinoline Ylw Ss Solo 33 Dr400 Ethanol Ethylene Glycol Formic Acid Guar Gum Hemicellulase Enzyme Hydrochloric Acid Hydrotreated Light Petroleum Distillate Isotridecanol, Ethoxylated Magnesium Chloride Hexahydrate Methanesulfonic Acid Methanol Monoethanolamine Oxygenate And Paraffinic Stream Polyacrylamide Polyalkylene Glycol Potassium Potassium Iodide Propylene Carbonate 7758-19-2 67-48-1 104-55-2 5392-40-5 77-92-9 7631-86-9 34590-94-8 139-33-3 64742-53-6 8003-22-3 64-17-5 107-21-1 64-18-6 9000-30-0 9025-56-3 7647-01-0 64742-47-8 9043-30-5 7791-18-6 75-75-2 67-56-1 141-43-5 876065-86-0 9003-05-8 52624-57-4 7440-09-7 7681-11-0 108-32-7 8/19/2025 - 9:52 AM Page 2 of 3 Chemical Name CAS Number Propylene Glycol Quaternium 18-Bentonite Silicon Dioxide Sodium Bisulfite Sodium Chlorate Sodium Chloride Sodium Hydroxide Solvent Blue 35 Sorbitan Monolaurate Sorbitan, Mono-9-Octadecenoate, (Z) 8-Alanine, N-(2-Carboxyethyl)-N-Dodecyl-, Sodium Salt (1:1) Sucrose Tar Bases, Quinoline Derivs, Benzyl Chloride-Quaternized Tar Bases, Quinoline Derivs. Tert-Butyl Hydroperoxide Thiourea -Formaldehyde Copolymer Water White Mineral Oil 57-55-6 1340-69-8 14808-60-7 7631-90-5 7775-09-9 7647-14-5 1310-73-2 17354-14-2 1338-39-2 1338-43-8 14960-06-6 57-50-1 72480-70-7 68513-87-1 75-91-2 68527-49-1 7732-18-5 8042-47-5 8/19/2025 - 9:52 AM Page 3 of 3 Chemical Disclosure Rev 5/24 State of Colorado Energy & Carbon Management Commission 1120 Lincoln Street, Suite 801, Denver, CO 80203 Phone, Suite 801, Denver, CO 80203 lc .3, CHEMICAL DISCLOSURE LIST Colorado Revised Statutes (C.R.S.) 34-60-132 requires oil and gas operators in Colorado to disclose the chemicals used in downhole operations to certain persons and entities near their downhole operations. Operators report chemical products used in downhole operations to the ECMC on a location -by -location basis. Information provided by Chemical Manufacturers and the oil and gas operator is aggregated by the ECMC into a chemical disclosure list for release to the public. Chemicals are reported on the list alphabetically and include each chemical's Chemical Abstracts Service Number (CAS Number) as assigned by the Chemical Abstracts Service. Pursuant to C.R.S. 34-60-132, Operators must provide the chemical disclosure list to the interested parties defined in the law within 30 days after receipt of the chemical disclosure list from the ECMC. Chemical Disclosures Location: 458940 I Chalk -Seeley -K2 - Whitney 6N66W26 1-54 Operator: 69175 I Pdc Energy Inc County: Weld Lat/Long: 40.461487/-104.74216 Chemical Name CAS Number 2-Propanol 67-63-0 2-Propenoic Acid, Ammonium Salt 10604-69-0 2-Propenoic Acid, Ammonium Salte (1:1), Polymer With 2-Propenamide 26100-47-0 Acrylamide 79-06-1 Alcohols, (C10-16), Ethoxylated 68002-97-1 Alcohols, C12-14, Ethoxylated 68439-50-9 Alcohols, C12-16, Ethoxylated 68551-12-2 Alkyl Oxirane Polymer 64366-70-7 Calcium 7440-70-2 Chlorine Dioxide 10049-04-4 Chlorous Acid, Sodium Salt 7758-19-2 Cinnamaldehyde 104-55-2 Citric Acid 77-92-9 Dipropylene Glycol Methyl Ether 34590-94-8 Disodium Ethylene Diamine Tetra Acetate (Impurity) 139-33-3 Dye Chinoline Ylw Ss Solv 33 Dr400 8003-22-3 Ethylene Glycol 107-21-1 Formic Acid 64-18-6 8/19/2025 - 9:51 AM Page 1 of 2 Chemical Name CAS Number Hydrochloric Acid Hydrotreated Light Petroleum Distillate Magnesium Chloride Hexahydrate Oxygenate And Paraffinic Stream Polyacrylamide Polyalkylene Glycol Potassium Sodium Bisulfite Sodium Chlorate Sodium Chloride Sodium Metaborate Sodium Perborate Tetrahydrate Solvent Blue 35 Sorbitan, Mono-9-Octadecenoate, (Z) Thiourea -Formaldehyde Copolymer Water 7647-01-0 64742-47-8 7791-18-6 876065-86-0 9003-05-8 52624-57-4 7440-09-7 7631-90-5 7775-09-9 7647-14-5 10555-76-7 10486-00-7 17354-14-2 1338-43-8 68527-49-1 7732-18-5 8/19/2025 - 9:51 AM Page 2 of 2 Chemical Disclosure Rev 5/24 State of Colorado Energy 8t Carbon Management Commission 1120 Lincoln Street, Suite 801, Denver, CO 80203 C ‘2111 Phone, Suite 801, Denver, CO 80203 CHEMICAL DISCLOSURE LIST Colorado Revised Statutes (C.R.S.) 34-60-132 requires oil and gas operators in Colorado to disclose the chemicals used in downhole operations to certain persons and entities near their downhole operations. Operators report chemical products used in downhole operations to the ECMC on a location -by -location basis. Information provided by Chemical Manufacturers and the oil and gas operator is aggregated by the ECMC into a chemical disclosure list for release to the public. Chemicals are reported on the list alphabetically and include each chemical's Chemical Abstracts Service Number (CAS Number) as assigned by the Chemical Abstracts Service. Pursuant to C.R.S. 34-60-132, Operators must provide the chemical disclosure list to the interested parties defined in the law within 30 days after receipt of the chemical disclosure list from the ECMC. Chemical Disclosures Location: 465661 I Stout 7N66W18 1-16 Operator: 69175 I Pdc Energy Inc County: Weld Lat/Long: 40.58089/-104.8232 Chemical Name CAS Number 2-Propenoic Acid, Ammonium Salt 2-Propenoic Acid, Ammonium Salte (1:1), Polymer With 2-Propenamide Acrylamide Alcohols, C12 -14 -Secondary, Ethoxylated Alcohols, C12-16, Ethoxylated Alcohols, C14-15, Ethoxylated Chlorine Dioxide Chlorous Acid, Sodium Salt Diolamine Ethylene Oxide Fatty Acid, Tall -Oil Hydrochloric Acid Hydrogenated Tallow Amine Hydrotreated Light Petroleum Distillate Methanol Polyacrylamide Polyoxyethylene Monoleate Propargyl Alcohol 10604-69-0 26100-47-0 79-06-1 84133-50-6 68551-12-2 68951-67-7 10049-04-4 7758-19-2 111-42-2 75-21-8 61790-12-3 7647-01-0 61791-26-2 64742-47-8 67-56-1 9003-05-8 9004-96-0 107-19-7 8/19/2025 - 9:46 AM Page 1 of 2 Chemical Name CAS Number Sodium Bisulfite Sodium Chlorate Sodium Chloride Sodium Perborate Tetrahydrate Sorbitan, Mono-9-Octadecenoate, (Z) Sorbitol Diethoxylated Tetraoleate Tall Oil Acid Diethanolamide Thiourea -Formaldehyde Copolymer Water 7631-90-5 7775-09-9 7647-14-5 10486-00-7 1338-43-8 61723-83-9 68155-20-4 68527-49-1 7732-18-5 8/19/2025 - 9:46 AM Page 2 of 2 Hello