{"query":{"parameter":"lead","place":"US-VA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-VA","US"],"parameter_keys":["cas:7439-92-1","cas:301-04-2","name:arsenic, cadmium (h), copper (h), lead (h), mercury, zinc","name:arsenic, cadmium (h), copper (h), lead (h), zinc","name:cadmium (h), copper (h), mercury, lead (h), zinc","cas:1335-32-6","cas:7446-27-7","name:lead - total","name:lead, total","name:lead, total recoverable","cas:78-00-2","cas:75-74-1","name:total lead","cas:1067-14-7","name:plomb-210","name:plomb extractible"],"names_matched":[["lead","cas:7439-92-1"],["acetic acid lead 2 salt","cas:301-04-2"],["arsenic cadmium h copper h lead h mercury zinc","name:arsenic, cadmium (h), copper (h), lead (h), mercury, zinc"],["arsenic cadmium h copper h lead h mercury zinc h","name:arsenic, cadmium (h), copper (h), lead (h), mercury, zinc"],["arsenic cadmium h copper h lead h zinc","name:arsenic, cadmium (h), copper (h), lead (h), zinc"],["arsenic cadmium h copper h lead h zinc h","name:arsenic, cadmium (h), copper (h), lead (h), zinc"],["cadmium h copper h mercury lead h zinc","name:cadmium (h), copper (h), mercury, lead (h), zinc"],["cadmium h copper h mercury lead h zinc h","name:cadmium (h), copper (h), mercury, lead (h), zinc"],["lead acetate","cas:1335-32-6"],["lead acetate","cas:301-04-2"],["lead ii acetate","cas:301-04-2"],["lead ii phosphate","cas:7446-27-7"],["lead phosphate","cas:7446-27-7"],["lead subacetate","cas:1335-32-6"],["lead total","name:lead - total"],["lead total","name:lead, total"],["lead total recoverable","name:lead, total recoverable"],["tetraethyl lead","cas:78-00-2"],["tetramethyl lead","cas:75-74-1"],["total lead","name:total lead"],["total lead freshwater","name:total lead"],["total lead marine","name:total lead"],["triethyl lead","cas:1067-14-7"],["plomb 210","name:plomb-210","plomb"],["plomb extractible","name:plomb extractible","plomb"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":3205,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"44991525e3bd403f","parameter":"Lead","value":"94 CaCO 3 = 100","value_num":94,"unit":"µg/l","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7439-92-1","place":["US-VA"],"conditions":["receiving_water is freshwater","Class II tidal freshwater and Classes III-VII (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria","total hardness 100 mg/L as CaCO3: the table's example value; the criterion is the hardness equation the row prints"],"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. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"9VAC25-260-140 B, Table of Parameters (freshwater acute)","page":null,"quote":"Lead (µg/l) 5 7439921 Freshwater values are a function of total hardness as calcium carbonate CaCO 3 mg/l and the water effect ratio. The minimum hardness allowed for use in the equation below shall be 25 and the maximum hardness shall be 400 even when the actual ambient hardness is less than 25 or greater than 400. Freshwater acute criterion (µg/l) WER [e {1.273[ln(hardness)]-1.084} ](CF a ) Freshwater chronic criterion (µg/l) WER [e {1.273[ln(hardness)]-3.259} ] (CF c ) WER = Water Effect Ratio = 1 unless determined otherwise under 9VAC25-260-140 F e = natural antilogarithm ln = natural logarithm CF = conversion factor a (acute) or c (chronic) CF a = 1.46203-[(ln hardness)(0.145712)] CF c = 1.46203-[(ln hardness)(0.145712)] 94 CaCO 3 = 100 11 CaCO 3 = 100 230 X WER 8.8 X WER 15"}},{"id":"beb5b0c687769c59","parameter":"Lead","value":"11 CaCO 3 = 100","value_num":11,"unit":"µg/l","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7439-92-1","place":["US-VA"],"conditions":["receiving_water is freshwater","Class II tidal freshwater and Classes III-VII (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria","total hardness 100 mg/L as CaCO3: the table's example value; the criterion is the hardness equation the row prints"],"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. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"9VAC25-260-140 B, Table of Parameters (freshwater chronic)","page":null,"quote":"Lead (µg/l) 5 7439921 Freshwater values are a function of total hardness as calcium carbonate CaCO 3 mg/l and the water effect ratio. The minimum hardness allowed for use in the equation below shall be 25 and the maximum hardness shall be 400 even when the actual ambient hardness is less than 25 or greater than 400. Freshwater acute criterion (µg/l) WER [e {1.273[ln(hardness)]-1.084} ](CF a ) Freshwater chronic criterion (µg/l) WER [e {1.273[ln(hardness)]-3.259} ] (CF c ) WER = Water Effect Ratio = 1 unless determined otherwise under 9VAC25-260-140 F e = natural antilogarithm ln = natural logarithm CF = conversion factor a (acute) or c (chronic) CF a = 1.46203-[(ln hardness)(0.145712)] CF c = 1.46203-[(ln hardness)(0.145712)] 94 CaCO 3 = 100 11 CaCO 3 = 100 230 X WER 8.8 X WER 15"}},{"id":"f64e1c4d34933659","parameter":"Lead","value":"230 X WER","value_num":230,"unit":"µg/l","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7439-92-1","place":["US-VA"],"conditions":["receiving_water is marine","Class I and Class II estuarine waters (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria"],"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. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"9VAC25-260-140 B, Table of Parameters (saltwater acute)","page":null,"quote":"Lead (µg/l) 5 7439921 Freshwater values are a function of total hardness as calcium carbonate CaCO 3 mg/l and the water effect ratio. The minimum hardness allowed for use in the equation below shall be 25 and the maximum hardness shall be 400 even when the actual ambient hardness is less than 25 or greater than 400. Freshwater acute criterion (µg/l) WER [e {1.273[ln(hardness)]-1.084} ](CF a ) Freshwater chronic criterion (µg/l) WER [e {1.273[ln(hardness)]-3.259} ] (CF c ) WER = Water Effect Ratio = 1 unless determined otherwise under 9VAC25-260-140 F e = natural antilogarithm ln = natural logarithm CF = conversion factor a (acute) or c (chronic) CF a = 1.46203-[(ln hardness)(0.145712)] CF c = 1.46203-[(ln hardness)(0.145712)] 94 CaCO 3 = 100 11 CaCO 3 = 100 230 X WER 8.8 X WER 15"}},{"id":"81f77ca4fd88334e","parameter":"Lead","value":"8.8 X WER","value_num":8.8,"unit":"µg/l","statistic":"four_day_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7439-92-1","place":["US-VA"],"conditions":["receiving_water is marine","Class I and Class II estuarine waters (9VAC25-260-140 C); in a Class II transition zone the more stringent of the freshwater and saltwater criteria"],"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. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"9VAC25-260-140 B, Table of Parameters (saltwater chronic)","page":null,"quote":"Lead (µg/l) 5 7439921 Freshwater values are a function of total hardness as calcium carbonate CaCO 3 mg/l and the water effect ratio. The minimum hardness allowed for use in the equation below shall be 25 and the maximum hardness shall be 400 even when the actual ambient hardness is less than 25 or greater than 400. Freshwater acute criterion (µg/l) WER [e {1.273[ln(hardness)]-1.084} ](CF a ) Freshwater chronic criterion (µg/l) WER [e {1.273[ln(hardness)]-3.259} ] (CF c ) WER = Water Effect Ratio = 1 unless determined otherwise under 9VAC25-260-140 F e = natural antilogarithm ln = natural logarithm CF = conversion factor a (acute) or c (chronic) CF a = 1.46203-[(ln hardness)(0.145712)] CF c = 1.46203-[(ln hardness)(0.145712)] 94 CaCO 3 = 100 11 CaCO 3 = 100 230 X WER 8.8 X WER 15"}},{"id":"40a1cbbb26eb6d20","parameter":"Lead","value":"15","value_num":15,"unit":"µg/l","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:7439-92-1","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. June 26, 2024","source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section140/","source_sha256":"05d91f8142e13aa9978b182c77033df2412d2af9decd0586bcb8b3974972a5f7","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"9VAC25-260-140 B, Table of Parameters (human health, public water supply)","page":null,"quote":"Lead (µg/l) 5 7439921 Freshwater values are a function of total hardness as calcium carbonate CaCO 3 mg/l and the water effect ratio. The minimum hardness allowed for use in the equation below shall be 25 and the maximum hardness shall be 400 even when the actual ambient hardness is less than 25 or greater than 400. Freshwater acute criterion (µg/l) WER [e {1.273[ln(hardness)]-1.084} ](CF a ) Freshwater chronic criterion (µg/l) WER [e {1.273[ln(hardness)]-3.259} ] (CF c ) WER = Water Effect Ratio = 1 unless determined otherwise under 9VAC25-260-140 F e = natural antilogarithm ln = natural logarithm CF = conversion factor a (acute) or c (chronic) CF a = 1.46203-[(ln hardness)(0.145712)] CF c = 1.46203-[(ln hardness)(0.145712)] 94 CaCO 3 = 100 11 CaCO 3 = 100 230 X WER 8.8 X WER 15"}},{"id":"a1be64b27961f62a","parameter":"Pb","value":".6","value_num":0.6,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart A—Electroplating of Common Metals Subcategory","existing sources (PSES)","(b) For a source discharging less than 38,000 liters (10,000 gal.) per calendar day of electroplating process wastewater the following limitations shall apply:","table: Subpart A—Common Metals Facilities Discharging Less Than 38,000 Liters Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.14 (PSES)","page":null,"quote":"Pb .6 .4"}},{"id":"4f838814074f385c","parameter":"Pb","value":".4","value_num":0.4,"unit":"mg/L","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart A—Electroplating of Common Metals Subcategory","existing sources (PSES)","(b) For a source discharging less than 38,000 liters (10,000 gal.) per calendar day of electroplating process wastewater the following limitations shall apply:","table: Subpart A—Common Metals Facilities Discharging Less Than 38,000 Liters Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.14 (PSES)","page":null,"quote":"Pb .6 .4"}},{"id":"073d86c6ad3d2bc8","parameter":"Pb","value":".6","value_num":0.6,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart A—Electroplating of Common Metals Subcategory","existing sources (PSES)","(c) For plants discharging 38,000 liters (10,000 gal) or more per calendar day of electroplating process wastewater the following limitations shall apply:","table: Subpart A—Common Metals Facilities Discharging 38,000 Liters or More Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.14 (PSES)","page":null,"quote":"Pb .6 .4"}},{"id":"45014f182383051e","parameter":"Pb","value":".4","value_num":0.4,"unit":"mg/L","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart A—Electroplating of Common Metals Subcategory","existing sources (PSES)","(c) For plants discharging 38,000 liters (10,000 gal) or more per calendar day of electroplating process wastewater the following limitations shall apply:","table: Subpart A—Common Metals Facilities Discharging 38,000 Liters or More Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.14 (PSES)","page":null,"quote":"Pb .6 .4"}},{"id":"ff8acaa5eb37bb67","parameter":"Pb","value":"23","value_num":23,"unit":"mg/sq m-Operation","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart A—Electroplating of Common Metals Subcategory","existing sources (PSES)","(d) Alternatively, the following mass-based standards are equivalent to and may be applied in place of those limitations specified under paragraph (c) of this section upon prior agreement between a source subject to these standards and the publicly owned treatment works receiving such regulated wastes:","table: Subpart A—Common Metals Facilities Discharging 38,000 Liters or More Per Day PSES Limitations (mg/sq m-Operation)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.14 (PSES)","page":null,"quote":"Pb 23 16"}},{"id":"7e30ab8e08f24802","parameter":"Pb","value":"16","value_num":16,"unit":"mg/sq m-Operation","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart A—Electroplating of Common Metals Subcategory","existing sources (PSES)","(d) Alternatively, the following mass-based standards are equivalent to and may be applied in place of those limitations specified under paragraph (c) of this section upon prior agreement between a source subject to these standards and the publicly owned treatment works receiving such regulated wastes:","table: Subpart A—Common Metals Facilities Discharging 38,000 Liters or More Per Day PSES Limitations (mg/sq m-Operation)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.14 (PSES)","page":null,"quote":"Pb 23 16"}},{"id":"4ea0a917b4a14695","parameter":"Pb","value":".6","value_num":0.6,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart A—Electroplating of Common Metals Subcategory","existing sources (PSES)","(e) For wastewater sources regulated under paragraph (c) of this section, the following optional control program may be elected by the source introducing treated process wastewater into a publicly owned treatment works with the concurrence of the control authority. These optional pollutant parameters are not eligible for allowance for removal achieved by the publicly owned treatment works under…","table: Subpart A—Common Metals Facilities Discharging 38,000 Liters or More Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.14 (PSES)","page":null,"quote":"Pb .6 .4"}},{"id":"9a3dc7e1ea8c3e9f","parameter":"Pb","value":".4","value_num":0.4,"unit":"mg/L","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart A—Electroplating of Common Metals Subcategory","existing sources (PSES)","(e) For wastewater sources regulated under paragraph (c) of this section, the following optional control program may be elected by the source introducing treated process wastewater into a publicly owned treatment works with the concurrence of the control authority. These optional pollutant parameters are not eligible for allowance for removal achieved by the publicly owned treatment works under…","table: Subpart A—Common Metals Facilities Discharging 38,000 Liters or More Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.14 (PSES)","page":null,"quote":"Pb .6 .4"}},{"id":"322467dc89f46004","parameter":"Pb","value":".6","value_num":0.6,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart B—Electroplating of Precious Metals Subcategory","existing sources (PSES)","(b) For a source discharging less than 38,000 liters (10,000 gal) per calendar day of electroplating process wastewater the following limitations shall apply:","table: Subpart B—Precious Metals Facilities Discharging Less Than 38,000 Liters Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.24 (PSES)","page":null,"quote":"Pb .6 .4"}},{"id":"9a77e5526307d7c1","parameter":"Pb","value":".4","value_num":0.4,"unit":"mg/L","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart B—Electroplating of Precious Metals Subcategory","existing sources (PSES)","(b) For a source discharging less than 38,000 liters (10,000 gal) per calendar day of electroplating process wastewater the following limitations shall apply:","table: Subpart B—Precious Metals Facilities Discharging Less Than 38,000 Liters Per Day PSES Limitations (mg/l)"],"cite":{"instrument":"us_40cfr413","title":"40 CFR Part 413 — PART 413—ELECTROPLATING 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=413","source_sha256":"9c6c38baf048e0e1ed5f2c05df397ea581d48822b23c4b294e52b960b2d547f9","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"unchanged"},"section":"40 CFR 413.24 (PSES)","page":null,"quote":"Pb .6 .4"}},{"id":"4f2bf8e98bb467fb","parameter":"Pb","value":".6","value_num":0.6,"unit":"mg/L","statistic":"daily_max","direction":"max","kind":"limit","medium":"water_discharge","level":"national","route":"sewer","parameter_key":"cas:7439-92-1","place":["US"],"conditions":["route is sewer","cites is 40 CFR 413","the discharge is of the Subpart B—Electroplating of Precious Metals Subcategory","existing sources (PSES)","(c) For plants discharging 38,000 liters (10,000 gal) or 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