{"query":{"parameter":"combined","place":"US-VA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-VA","US"],"parameter_keys":["name:combined","name:combined metals","name:combined radium-226 and radium-228","name:radioactive substances","name:radium 226 and 228 combined","name:radium-226 and -228","name:radium 226 + radium 228","name:radium-226 + radium-228"],"names_matched":[["combined","name:combined"],["combined metals","name:combined metals"],["combined radium 226 and radium 228","name:combined radium-226 and radium-228"],["radioactive substances combined radium 226 and 228","name:radioactive substances"],["radium 226 and 228 combined","name:radium 226 and 228 combined"],["radium 226 and 228 combined","name:radium-226 and -228"],["radium 226 radium 228 combined dissolved","name:radium 226 + radium 228"],["radium 226 radium 228 combined dissolved","name:radium-226 + radium-228"],["radium 226 radium 228 combined total","name:radium 226 + radium 228"],["radium 226 radium 228 combined total","name:radium-226 + radium-228"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":73,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"d593e73d245020b3","parameter":"Combined","value":"5","value_num":5,"direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"name:combined","place":["US-VA"],"conditions":["segments designated PWS (public water supply) in 9VAC25-260-390 through 9VAC25-260-540"],"cite":{"instrument":"us_va_wqs","title":"9VAC25-260-140 — Criteria for surface water (Virginia Water Quality Standards), Table of Parameters","issuer":"Commonwealth of Virginia, State Water Control Board (Department of Environmental Quality)","edition":"Virginia Administrative Code as served by the General Assembly's LIS on 2026-10-09; last amended Virginia Register Volume 40, Issue 24, eff. 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Secondary Precious Metals 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 421.262 (BPT)","page":null,"quote":"Combined metals 21.54"}},{"id":"5e436eeb5823cb6b","parameter":"Combined metals","value":"1.902","value_num":1.902,"unit":"mg/troy ounce of precious metal in the granulated raw material","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BPT)","(b) Raw material granulation.","table: BPT Limitations for the Secondary Precious Metals 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 421.262 (BPT)","page":null,"quote":"Combined metals 1.902"}},{"id":"df36d714243114b2","parameter":"Combined metals","value":"0.300","value_num":0.3,"unit":"mg/liter of spent plating solution used as a raw 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0.300"}},{"id":"2a7c9583b0cc8144","parameter":"Combined metals","value":"1.110","value_num":1.11,"unit":"mg/troy ounce of gold produced by cyanide stripping","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BPT)","(d) Spent cyanide stripping solutions.","table: BPT Limitations for the Secondary Precious Metals 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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If both acid and alkaline wet air pollution control scrubbers are present in a particular facility the same allowance applies to each.","table: BPT Limitations for the Secondary Precious Metals 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 421.262 (BPT)","page":null,"quote":"Combined metals 6.300"}},{"id":"d69ed171fbb6ab8e","parameter":"Combined metals","value":"0.189","value_num":0.189,"unit":"mg/troy ounce of gold produced by solvent extraction","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BPT)","(f) Gold solvent extraction raffinate and wash water.","table: BPT Limitations for the Secondary Precious Metals 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 421.262 (BPT)","page":null,"quote":"Combined metals 0.189"}},{"id":"d5b7115200eb7239","parameter":"Combined metals","value":"0.003","value_num":0.003,"unit":"mg/troy ounce of gold produced by electrolysis","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BPT)","(g) Gold spent electrolyte.","table: BPT Limitations for the Secondary Precious Metals 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 421.262 (BPT)","page":null,"quote":"Combined metals 1.320"}},{"id":"240dc643f6982b41","parameter":"Combined metals","value":"1.560","value_num":1.56,"unit":"mg/troy ounce of platinum precipitated","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BPT)","(i) Platinum precipitation and filtration.","table: BPT Limitations for the Secondary Precious Metals 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 421.262 (BPT)","page":null,"quote":"Combined metals 1.560"}},{"id":"f1029d0a2954a512","parameter":"Combined metals","value":"1.800","value_num":1.8,"unit":"mg/troy ounce of palladium precipitated","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BPT)","(j) Palladium precipitation and filtration.","table: BPT Limitations for the Secondary Precious Metals 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 421.262 (BPT)","page":null,"quote":"Combined metals 1.800"}},{"id":"f795e761d25402d1","parameter":"Combined metals","value":"1.560","value_num":1.56,"unit":"mg/troy ounce of other platinum group metals 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(BPT)","page":null,"quote":"Combined metals 1.560"}},{"id":"68cf05b23a11e202","parameter":"Combined metals","value":"0.270","value_num":0.27,"unit":"mg/troy ounce of gold contained in PGC product","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BPT)","(l) Spent solution from PGC salt production.","table: BPT Limitations for the Secondary Precious Metals 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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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 421.262 (BPT)","page":null,"quote":"Combined metals 0.000 0.000"}},{"id":"d10a57208518213c","parameter":"Combined metals","value":"0.000","value_num":0,"unit":"mg/troy ounce of precious metals, including silver, produced in refinery","statistic":"monthly_avg","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BPT)","(m) Equipment and floor wash.","table: BPT Limitations for the Secondary Precious Metals 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 421.262 (BPT)","page":null,"quote":"Combined metals 0.000 0.000"}},{"id":"c9315786f9b0db96","parameter":"Combined Metals","value":"15.000","value_num":15,"unit":"mg/troy ounce of total precious metals produced through this operation","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined 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1.350"}},{"id":"8a847322c96ecc1e","parameter":"Combined metals","value":"0.192","value_num":0.192,"unit":"mg/troy ounce of precious metals in the granulated raw material","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BAT)","(b) Raw material granulation.","table: BAT Limitations for the Secondary Precious Metals 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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Gold"],"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 421.263 (BAT)","page":null,"quote":"Combined metals 0.300"}},{"id":"d3b7cf0d5070c964","parameter":"Combined metals","value":"1.110","value_num":1.11,"unit":"mg/troy ounce of gold produced by cyanide stripping","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals 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If both acid and alkaline wet air pollution control scrubbers are present in a particular facility the same allowance applies to each.","table: BAT Limitations for the Secondary Precious Metals 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 421.263 (BAT)","page":null,"quote":"Combined metals 0.300"}},{"id":"bbad57b8b4be15bf","parameter":"Combined metals","value":"0.189","value_num":0.189,"unit":"mg/troy ounce of gold produced by solvent 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metals 0.189"}},{"id":"e3b5a28e44728215","parameter":"Combined metals","value":"0.0030","value_num":0.003,"unit":"mg/troy ounce of gold produced by electrolysis","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BAT)","(g) Gold spent electrolyte.","table: BAT Limitations for the Secondary Precious Metals 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 421.263 (BAT)","page":null,"quote":"Combined metals 1.320"}},{"id":"f1ce15992199039d","parameter":"Combined metals","value":"0.560","value_num":0.56,"unit":"mg/troy ounce of platinum precipitated","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BAT)","(i) Platinum precipitation and filtration.","table: BAT Limitations for the Secondary Precious Metals 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 421.263 (BAT)","page":null,"quote":"Combined metals 0.560"}},{"id":"4f9beabf13203279","parameter":"Combined metals","value":"1.800","value_num":1.8,"unit":"mg/troy ounce of palladium precipitated","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BAT)","(j) Palladium precipitation and filtration.","table: BAT Limitations for the Secondary Precious Metals 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 421.263 (BAT)","page":null,"quote":"Combined metals 1.800"}},{"id":"5e978865b0beddb2","parameter":"Combined metals","value":"1.560","value_num":1.56,"unit":"mg/troy ounce of other platinum group metals 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(BAT)","page":null,"quote":"Combined metals 1.560"}},{"id":"1ee52e4e1190401f","parameter":"Combined metals","value":"0.270","value_num":0.27,"unit":"mg/troy ounce of gold contained in PGC product","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BAT)","(l) Spent solutions from PGC salt production.","table: BAT Limitations for the Secondary Precious Metals 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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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 421.263 (BAT)","page":null,"quote":"Combined metals 0.000"}},{"id":"43a18eb104598a58","parameter":"Combined metals","value":"15.000","value_num":15,"unit":"Mg/troy ounce of total precious metals produced through this operation","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","existing sources (BAT)","(n) Preliminary treatment.","table: BAT Limitations for the Secondary Precious Metals 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 421.263 (BAT)","page":null,"quote":"Combined metals 15.000"}},{"id":"5928998e333f8c30","parameter":"Combined metals","value":"1.350","value_num":1.35,"unit":"mg/troy ounce of precious metals, including silver, incinerated or smelted","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined 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0.192"}},{"id":"4e99966a04436e88","parameter":"Combined metals","value":"0.300","value_num":0.3,"unit":"mg/liter of spent plating solution used as a raw material","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","new sources (NSPS)","(c) Spent plating solutions.","table: NSPS for the Secondary Precious Metals 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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0.189"}},{"id":"458db1aa44fb57b5","parameter":"Combined metals","value":"0.003","value_num":0.003,"unit":"mg/troy ounce of gold produced by electrolysis","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"direct","parameter_key":"name:combined metals","place":["US"],"conditions":["route is direct","cites is 40 CFR 421","the discharge is of the Subpart X—Secondary Precious Metals Subcategory","new sources (NSPS)","(g) Gold spent electrolyte.","table: NSPS for the Secondary Precious Metals 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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