{"query":{"parameter":"tungsten","place":"US-CT","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-CT","US"],"parameter_keys":["cas:7440-33-7"],"names_matched":[["tungsten","cas:7440-33-7"]],"match":"exact","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":114,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"e72e90ea5a166c1c","parameter":"Tungsten","value":"1.357","value_num":1.357,"unit":"mg/kg (pounds per million pounds) of tungsten scrap washed","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(a) Tungsten detergent wash and rinse.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 1.357 0.542"}},{"id":"103641516e1f5929","parameter":"Tungsten","value":"0.542","value_num":0.542,"unit":"mg/kg (pounds per million pounds) of tungsten scrap washed","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(a) Tungsten detergent wash and rinse.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 1.357 0.542"}},{"id":"2e77d93222033706","parameter":"Tungsten","value":"17.890","value_num":17.89,"unit":"mg/kg (pounds per million pounds) of tungsten produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(b) Tungsten leaching acid.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 17.890 7.147"}},{"id":"3a2ba42e60869908","parameter":"Tungsten","value":"7.147","value_num":7.147,"unit":"mg/kg (pounds per million pounds) of tungsten produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(b) Tungsten leaching acid.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 17.890 7.147"}},{"id":"235e186650f5a267","parameter":"Tungsten","value":"35.800","value_num":35.8,"unit":"mg/kg (pounds per million pounds) of tungsten produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(c) Tungsten post-leaching wash and rinse.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 35.800 14.300"}},{"id":"49b320d680dbd337","parameter":"Tungsten","value":"14.300","value_num":14.3,"unit":"mg/kg (pounds per million pounds) of tungsten produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(c) Tungsten post-leaching wash and rinse.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 35.800 14.300"}},{"id":"e8ad46c6f6f7fc28","parameter":"Tungsten","value":"116.000","value_num":116,"unit":"mg/kg (pounds per million pounds) of synthetic scheelite produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(d) Synthetic scheelite filtrate.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 116.000 46.320"}},{"id":"442266facb20bedd","parameter":"Tungsten","value":"46.320","value_num":46.32,"unit":"mg/kg (pounds per million pounds) of synthetic scheelite produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(d) Synthetic scheelite filtrate.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 116.000 46.320"}},{"id":"6e78b8850ab74330","parameter":"Tungsten","value":"12.190","value_num":12.19,"unit":"mg/kg (pounds per million pounds) of tungsten carbide scrap leached","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(e) Tungsten carbide leaching wet air pollution control.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 12.190 4.868"}},{"id":"06279531612c2d28","parameter":"Tungsten","value":"4.868","value_num":4.868,"unit":"mg/kg (pounds per million pounds) of tungsten carbide scrap leached","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(e) Tungsten carbide leaching wet air pollution control.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 12.190 4.868"}},{"id":"28d898a43e5156d3","parameter":"Tungsten","value":"58.000","value_num":58,"unit":"mg/kg (pounds per million pounds) of tungsten carbide produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(f) Tungsten carbide wash water.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 58.000 23.170"}},{"id":"a7466eba66e16b5b","parameter":"Tungsten","value":"23.170","value_num":23.17,"unit":"mg/kg (pounds per million pounds) of tungsten carbide produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(f) Tungsten carbide wash water.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 58.000 23.170"}},{"id":"6b344b732fa2b146","parameter":"Tungsten","value":"249.000","value_num":249,"unit":"mg/kg (pounds per million pounds) of cobalt produced from cobalt sludge","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(g) Cobalt sludge leaching wet air pollution control.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 249.000 99.470"}},{"id":"bbda0dc70a11f28d","parameter":"Tungsten","value":"99.470","value_num":99.47,"unit":"mg/kg (pounds per million pounds) of cobalt produced from cobalt sludge","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(g) Cobalt sludge leaching wet air pollution control.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 249.000 99.470"}},{"id":"b3579ce06c71f7dd","parameter":"Tungsten","value":"289.900","value_num":289.9,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(h) Crystallization decant.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 289.900 115.800"}},{"id":"3abbe1f53c01477e","parameter":"Tungsten","value":"115.800","value_num":115.8,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(h) Crystallization decant.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 289.900 115.800"}},{"id":"ffc73549b75fd30b","parameter":"Tungsten","value":"132.700","value_num":132.7,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(i) Acid wash decant.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 132.700 52.990"}},{"id":"e689778ae6da79e7","parameter":"Tungsten","value":"52.990","value_num":52.99,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(i) Acid wash decant.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 132.700 52.990"}},{"id":"51bfbe691582007f","parameter":"Tungsten","value":"394.300","value_num":394.3,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(j) Cobalt hydroxide filtrate.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 394.300 157.500"}},{"id":"1af9901eb762706a","parameter":"Tungsten","value":"157.500","value_num":157.5,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(j) Cobalt hydroxide filtrate.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 394.300 157.500"}},{"id":"df355e9df594a6cc","parameter":"Tungsten","value":"758.900","value_num":758.9,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(k) Cobalt hydroxide filter cake wash.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 758.900 303.100"}},{"id":"bdbe63a4d2b84d43","parameter":"Tungsten","value":"303.100","value_num":303.1,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BPT)","(k) Cobalt hydroxide filter cake wash.","table: BPT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 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Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 0.679 0.302"}},{"id":"dc3c1c663aee28f3","parameter":"Tungsten","value":"0.302","value_num":0.302,"unit":"mg/kg (pounds per million pounds) of tungsten scrap washed","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(a) Tungsten detergent wash and rinse.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 0.679 0.302"}},{"id":"a6101343e45ef19a","parameter":"Tungsten","value":"8.947","value_num":8.947,"unit":"mg/kg (pounds per million pounds) of tungsten produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(b) Tungsten leaching acid.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 8.947 3.985"}},{"id":"e2c26e29d0e571e3","parameter":"Tungsten","value":"3.985","value_num":3.985,"unit":"mg/kg (pounds per million pounds) of tungsten produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(b) Tungsten leaching acid.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 8.947 3.985"}},{"id":"79b62bf23b51ef24","parameter":"Tungsten","value":"17.900","value_num":17.9,"unit":"mg/kg (pounds per million pounds) of tungsten produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(c) Tungsten post-leaching wash and rinse.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 17.900 7.972"}},{"id":"348f2a0a207d0661","parameter":"Tungsten","value":"7.972","value_num":7.972,"unit":"mg/kg (pounds per million pounds) of tungsten produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(c) Tungsten post-leaching wash and rinse.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 17.900 7.972"}},{"id":"a0888f52049621c8","parameter":"Tungsten","value":"57.980","value_num":57.98,"unit":"mg/kg (pounds per million pounds) of synthetic scheelite produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(d) Synthetic scheelite filtrate.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 57.980 25.820"}},{"id":"32fdb66140c629cc","parameter":"Tungsten","value":"25.820","value_num":25.82,"unit":"mg/kg (pounds per million pounds) of synthetic scheelite produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(d) Synthetic scheelite filtrate.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 57.980 25.820"}},{"id":"c4c9fbc28f6c41c9","parameter":"Tungsten","value":"6.093","value_num":6.093,"unit":"mg/kg (pounds per million pounds) of tungsten carbide scrap leached","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(e) Tungsten carbide leaching wet air pollution control.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 6.093 2.714"}},{"id":"18d5e2a101f191b9","parameter":"Tungsten","value":"2.714","value_num":2.714,"unit":"mg/kg (pounds per million pounds) of tungsten carbide scrap leached","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(e) Tungsten carbide leaching wet air pollution control.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 6.093 2.714"}},{"id":"4af7718a96e67e46","parameter":"Tungsten","value":"29.000","value_num":29,"unit":"mg/kg (pounds per million pounds) of tungsten carbide produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(f) Tungsten carbide wash water.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 29.000 12.920"}},{"id":"db76022e33262512","parameter":"Tungsten","value":"12.920","value_num":12.92,"unit":"mg/kg (pounds per million pounds) of tungsten carbide produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(f) Tungsten carbide wash water.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 29.000 12.920"}},{"id":"68a2497e39c4000d","parameter":"Tungsten","value":"124.50","value_num":124.5,"unit":"mg/kg (pounds per million pounds) of cobalt produced from cobalt sludge","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(g) Cobalt sludge leaching wet air pollution control.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 124.50 55.46"}},{"id":"4da5309c9d0b9fc9","parameter":"Tungsten","value":"55.46","value_num":55.46,"unit":"mg/kg (pounds per million pounds) of cobalt produced from cobalt sludge","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(g) Cobalt sludge leaching wet air pollution control.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 124.50 55.46"}},{"id":"a9a5e3f97d2c9731","parameter":"Tungsten","value":"144.900","value_num":144.9,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(h) Crystallization decant.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","issuer":"U.S. Environmental Protection Agency","edition":"eCFR as of 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421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 144.900 64.560"}},{"id":"5753b3ac07cb4096","parameter":"Tungsten","value":"66.340","value_num":66.34,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(i) Acid wash decant.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 66.340 29.550"}},{"id":"dc5485f1dd4c567b","parameter":"Tungsten","value":"29.550","value_num":29.55,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is 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421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 379.400 169.000"}},{"id":"cda955b57984f1fd","parameter":"Tungsten","value":"169.000","value_num":169,"unit":"mg/kg (pounds per million pounds) of cobalt produced","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart AC—Secondary Tungsten and Cobalt Subcategory","existing sources (BAT)","(k) Cobalt hydroxide filter cake wash.","table: BAT Limitations for the Secondary Tungsten and Cobalt Subcategory"],"cite":{"instrument":"us_40cfr421","title":"40 CFR Part 421 — PART 421—NONFERROUS METALS MANUFACTURING 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=421","source_sha256":"d7cfd73b5bcf0e961e02ec53264492b2371277280003192841b7166b2a5012cf","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 421.313 (BAT)","page":null,"quote":"Tungsten 379.400 169.000"}},{"id":"4c5715d030dc289d","parameter":"Tungsten","value":"0.679","value_num":0.679,"unit":"mg/kg (pounds per million pounds) of tungsten scrap washed","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"cas:7440-33-7","place":["US"],"conditions":["route is direct","cites is 40 CFR 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