{"query":{"parameter":"chromium","place":"US-MD","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-MD","US"],"parameter_keys":["cas:7440-47-3","cas:16065-83-1","name:chromium (+3)","name:chromium +3, total","name:chromium-51","cas:18540-29-9","name:chromium (+6)","name:chromium +6","name:chromium +6, total","name:chromium ii iii","name:chromium total","name:chromium, total","name:chromium (vi) (freshwater) chromium (vi) marine","cas:92203-02-6","name:total chromium","name:cromo totale","name:chrome total"],"names_matched":[["chromium","cas:7440-47-3"],["chromium 3","cas:16065-83-1"],["chromium 3","name:chromium (+3)"],["chromium 3 total","name:chromium +3, total"],["chromium 3 total recoverable","name:chromium (+3)"],["chromium 51","name:chromium-51"],["chromium 6","cas:18540-29-9"],["chromium 6","name:chromium (+6)"],["chromium 6","name:chromium +6"],["chromium 6 total","name:chromium +6, total"],["chromium 6 total recoverable","name:chromium (+6)"],["chromium and chromium compounds metallic divalent and trivalent","name:chromium ii iii"],["chromium compounds hexavalent","cas:18540-29-9"],["chromium hex","cas:18540-29-9"],["chromium hex dissolved","cas:18540-29-9"],["chromium hexavalent","cas:18540-29-9"],["chromium hexavalent cr vi","cas:18540-29-9"],["chromium hexavalent dissolved","cas:18540-29-9"],["chromium hexavalent total","cas:18540-29-9"],["chromium ii iii","name:chromium ii iii"],["chromium iii","cas:16065-83-1"],["chromium iii dissolved","cas:16065-83-1"],["chromium iii insoluble salts","cas:16065-83-1"],["chromium iii soluble compounds","cas:16065-83-1"],["chromium iii total","cas:16065-83-1"],["chromium iii total recoverable","cas:16065-83-1"],["chromium total","name:chromium total"],["chromium total","name:chromium, total"],["chromium total hexavalent cr vi","cas:18540-29-9"],["chromium total trivalent cr iii","cas:16065-83-1"],["chromium tri","cas:16065-83-1"],["chromium trivalent","cas:16065-83-1"],["chromium trivalent cr iii","cas:16065-83-1"],["chromium trivalent dissolved","cas:16065-83-1"],["chromium vi","cas:18540-29-9"],["chromium vi and compounds 1 12","cas:18540-29-9"],["chromium vi and compounds 1 13","cas:18540-29-9"],["chromium vi dissolved","cas:18540-29-9"],["chromium vi freshwater chromium vi marine","name:chromium (vi) (freshwater) chromium (vi) marine"],["chromium vi total","cas:18540-29-9"],["chromium vi total recoverable","cas:18540-29-9"],["hexavalent chromium","cas:18540-29-9"],["phosphoric acid reaction products with aluminum hydroxide and chromium oxide cro3","cas:92203-02-6"],["total chromium","name:total chromium"],["total chromium total recoverable","name:total chromium"],["chrom vi","cas:18540-29-9","chrom"],["cromo esavalente","cas:18540-29-9","cromo"],["cromo hexavalente","cas:18540-29-9","cromo"],["cromo total","name:total chromium","cromo"],["cromo totale","name:cromo totale","cromo"],["cromo trivalente","cas:16065-83-1","cromo"],["cromo vi","cas:18540-29-9","cromo"],["chrome composes de chrome hexavalent","cas:18540-29-9","chrome"],["chrome composes de chrome trivalent","cas:16065-83-1","chrome"],["chrome hexavalent et composes en cr 6","cas:18540-29-9","chrome"],["chrome iii cr iii","cas:16065-83-1","chrome"],["chrome total","name:chrome total","chrome"],["chrome total cr","name:chrome total","chrome"],["chrome vi cr vi","cas:18540-29-9","chrome"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":2706,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"c447d8496c03a12e","parameter":"Chromium (total)","value":"100","value_num":100,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-MD"],"conditions":["human health for consumption of drinking water + organism (the table's column)"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 1 (human health, drinking water + organism)","page":null,"quote":"Chromium (total) 7440473 100 0.1"}},{"id":"6db27bf174f1804f","parameter":"Chromium (total)","value":"0.1","value_num":0.1,"unit":"mg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7440-47-3","place":["US-MD"],"conditions":["Public Water Supply designated waters only (the table's * note)"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 1 (drinking water MCL)","page":null,"quote":"Chromium (total) 7440473 100 0.1"}},{"id":"df66a17bf5a13369","parameter":"Chromium III","value":"570","value_num":570,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:16065-83-1","place":["US-MD"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 1 (fresh water acute)","page":null,"quote":"Chromium III 1 16065831 570 74"}},{"id":"29f759d3394cd0a0","parameter":"Chromium III","value":"74","value_num":74,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:16065-83-1","place":["US-MD"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 1 (fresh water chronic)","page":null,"quote":"Chromium III 1 16065831 570 74"}},{"id":"337c588ae085b583","parameter":"Chromium VI","value":"16","value_num":16,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:18540-29-9","place":["US-MD"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 1 (fresh water acute)","page":null,"quote":"Chromium VI 18540299 16 11 1100 50"}},{"id":"8f82933cef9418b3","parameter":"Chromium VI","value":"11","value_num":11,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:18540-29-9","place":["US-MD"],"conditions":["receiving_water is freshwater"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 1 (fresh water chronic)","page":null,"quote":"Chromium VI 18540299 16 11 1100 50"}},{"id":"6fb6ec04cc012245","parameter":"Chromium VI","value":"1100","value_num":1100,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:18540-29-9","place":["US-MD"],"conditions":["receiving_water is marine","salt water (the table's Salt Water column)"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 1 (salt water acute)","page":null,"quote":"Chromium VI 18540299 16 11 1100 50"}},{"id":"292324a67c575cef","parameter":"Chromium VI","value":"50","value_num":50,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:18540-29-9","place":["US-MD"],"conditions":["receiving_water is marine","salt water (the table's Salt Water column)"],"cite":{"instrument":"us_md_wqs","title":"COMAR 26.08.02.03-2 — Numerical Criteria for Toxic Substances in Surface Waters (Maryland), Tables 1, 4, 5 and 6","issuer":"State of Maryland, Department of the Environment (MDE)","edition":"Code of Maryland Regulations as served by the Division of State Documents on 2026-10-09","source_url":"https://dsd.maryland.gov/regulations/Pages/26.08.02.03-2.aspx","source_sha256":"9924bc5fb2d109930b06f840cd56b722bdab36dfe897e28897e658512be1f9bd","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"COMAR 26.08.02.03-2 G, Table 1 (salt water chronic)","page":null,"quote":"Chromium VI 18540299 16 11 1100 50"}},{"id":"8fb1872a9885ace2","parameter":"Chromium","value":"5.0","value_num":5,"unit":"mg/L","direction":"max","kind":"threshold","medium":"leachate","level":"national","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["(a) A solid waste (except manufactured gas plant waste) exhibits the characteristic of toxicity if, using the Toxicity Characteristic Leaching Procedure, test Method 1311 in “Test Methods for Evaluating Solid Waste, Physical/Chemical Methods,” EPA Publication SW-846, as incorporated by reference in § 260.11 of this chapter, the extract from a representative sample of the waste contains any of the contaminants listed in table 1 at the concentration equal to or greater than the respective value given in that table. Where the waste contains less than 0.5 percent filterable solids, the waste itself, after filtering using the methodology outlined in Method 1311, is considered to be the extract for the purpose of this section."],"cite":{"instrument":"us_40cfr261_24","title":"40 CFR 261.24 — Toxicity characteristic: Table 1, maximum concentration of contaminants for the toxicity characteristic (TCLP regulatory levels)","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR, 40 CFR 261.24 as of 2026-10-13 (title 40 up to date as of that day)","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-13/title-40.xml?part=261&section=261.24","source_sha256":"3a1ec9b0d3051c70e471e359275657b0fa6d98e80927d2217e82b2dbbca60961","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 261.24, Table 1","page":null,"quote":"D007 Chromium 7440-47-3 5.0"}},{"id":"96c2b6d624ded0c8","parameter":"Chromium (Total)","value":"2.77","value_num":2.77,"unit":"mg/L","statistic":"composite","direction":"max","kind":"limit","medium":"product","level":"national","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["(a) Table UTS identifies the hazardous constituents, along with the nonwastewater and wastewater treatment standard levels, that are used to regulate most prohibited hazardous wastes with numerical limits. For determining compliance with treatment standards for underlying hazardous constituents as defined in § 268.2(i), these treatment standards may not be exceeded. Compliance with these treatment standards is measured by an analysis of grab samples, unless otherwise noted in the following Table UTS."],"cite":{"instrument":"us_40cfr268_48","title":"40 CFR 268.48 — Universal treatment standards: Table UTS, wastewater and nonwastewater treatment standards for the hazardous constituents of land-disposal-restricted wastes","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR, 40 CFR 268.48 as of 2026-10-13 (title 40 up to date as of that day; source note: 59 FR 48103, Sept. 19, 1994, as last amended at 76 FR 34156, June 13, 2011)","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-13/title-40.xml?part=268&section=268.48","source_sha256":"70b2e58a6b1e228e2c204acc69b69fab0d5a0347e35d569959073c3dc3ee4adb","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 268.48, Table UTS, Inorganic Constituents, wastewater standard","page":null,"quote":"Chromium (Total) 7440-47-3 2.77 0.60 mg/l TCLP"}},{"id":"28487d54f43db568","parameter":"Chromium (Total)","value":"0.60 mg/l TCLP","value_num":0.6,"unit":"mg/L TCLP","statistic":"instant","direction":"max","kind":"limit","medium":"leachate","level":"national","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["(a) Table UTS identifies the hazardous constituents, along with the nonwastewater and wastewater treatment standard levels, that are used to regulate most prohibited hazardous wastes with numerical limits. For determining compliance with treatment standards for underlying hazardous constituents as defined in § 268.2(i), these treatment standards may not be exceeded. Compliance with these treatment standards is measured by an analysis of grab samples, unless otherwise noted in the following Table UTS."],"cite":{"instrument":"us_40cfr268_48","title":"40 CFR 268.48 — Universal treatment standards: Table UTS, wastewater and nonwastewater treatment standards for the hazardous constituents of land-disposal-restricted wastes","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"eCFR, 40 CFR 268.48 as of 2026-10-13 (title 40 up to date as of that day; source note: 59 FR 48103, Sept. 19, 1994, as last amended at 76 FR 34156, June 13, 2011)","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-13/title-40.xml?part=268&section=268.48","source_sha256":"70b2e58a6b1e228e2c204acc69b69fab0d5a0347e35d569959073c3dc3ee4adb","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 268.48, Table UTS, Inorganic Constituents, nonwastewater standard","page":null,"quote":"Chromium (Total) 7440-47-3 2.77 0.60 mg/l TCLP"}},{"id":"a2fa3493dcb86bd1","parameter":"Total chromium","value":"0.10","value_num":0.1,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","existing sources (BPT)"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 410.12 (BPT)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"36635e19cc6a833a","parameter":"Total chromium","value":"0.05","value_num":0.05,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","existing sources (BPT)"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 410.12 (BPT)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"19f355cc15cdb2b4","parameter":"Total chromium","value":"0.10","value_num":0.1,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","existing sources (BAT)"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 410.13 (BAT)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"561c76aeec589198","parameter":"Total chromium","value":"0.05","value_num":0.05,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","existing sources (BAT)"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 410.13 (BAT)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"5bfc61f2e78c8431","parameter":"Total chromium","value":"0.10","value_num":0.1,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","new sources (NSPS)","Any new source subject to this subpart must achieve the following new source performance standards (NSPS):"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 2026-10-05","source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-10-05/title-40.xml?part=410","source_sha256":"02c53988595c9f2911727f635f59f6a2af0c1d50ce06550c150a706321a505b3","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"40 CFR 410.15 (NSPS)","page":null,"quote":"Total chromium 0.10 0.05"}},{"id":"8dbd6e58fdbd9768","parameter":"Total chromium","value":"0.05","value_num":0.05,"unit":"Kg/kkg (or pounds per 1,000 lb) of wool","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-47-3","place":["US"],"conditions":["route is direct","cites is 40 CFR 410","the discharge is of the Subpart A—Wool Scouring Subcategory","new sources (NSPS)","Any new source subject to this subpart must achieve the following new source performance standards (NSPS):"],"cite":{"instrument":"us_40cfr410","title":"40 CFR Part 410 — PART 410—TEXTILE MILLS POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 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