{"query":{"parameter":"tungsten","place":"US-TX","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-TX","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":130,"offset":0,"returned":50,"next_offset":50,"rows":[{"id":"8676440bbb772525","parameter":"Tungsten (as sodium tungstate dihydride)","value":"7.3E+01","value_num":73,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","residential land use, 0.5 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 1, Residential Soil, TotSoilComb, 0.5 acre source area","page":22,"quote":null}},{"id":"bb45914d615c9a9d","parameter":"Tungsten (as sodium tungstate dihydride)","value":"8.1E+01","value_num":81,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","residential land use, 0.5 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 1, Residential Soil, GWSoilIng, 0.5 acre source area","page":22,"quote":null}},{"id":"2c52eef691e5220b","parameter":"Tungsten (as sodium tungstate dihydride)","value":"8.1E+03","value_num":8100,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","residential land use, 0.5 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 1, Residential Soil, GWSoilClass 3, 0.5 acre source area","page":22,"quote":null}},{"id":"3a8d0103c69e914b","parameter":"Tungsten (as sodium tungstate dihydride)","value":"7.3E+01","value_num":73,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","residential land use, 30 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 1, Residential Soil, TotSoilComb, 30 acre source area","page":22,"quote":null}},{"id":"48706ae64cd2afa7","parameter":"Tungsten (as sodium tungstate dihydride)","value":"4.1E+01","value_num":41,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","residential land use, 30 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 1, Residential Soil, GWSoilIng, 30 acre source area","page":22,"quote":null}},{"id":"36767e1d3396755d","parameter":"Tungsten (as sodium tungstate dihydride)","value":"4.1E+03","value_num":4100,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","residential land use, 30 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 1, Residential Soil, GWSoilClass 3, 30 acre source area","page":22,"quote":null}},{"id":"2682e56cfe48614e","parameter":"Tungsten (as sodium tungstate dihydride)","value":"8.2E+02","value_num":820,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","commercial/industrial land use, 0.5 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 2, Commercial/Industrial Soil, TotSoilComb, 0.5 acre source area","page":37,"quote":null}},{"id":"99b6e93102917785","parameter":"Tungsten (as sodium tungstate dihydride)","value":"2.4E+02","value_num":240,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","commercial/industrial land use, 0.5 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 2, Commercial/Industrial Soil, GWSoilIng, 0.5 acre source area","page":37,"quote":null}},{"id":"bc55992a1d19331b","parameter":"Tungsten (as sodium tungstate dihydride)","value":"2.4E+04","value_num":24000,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","commercial/industrial land use, 0.5 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 2, Commercial/Industrial Soil, GWSoilClass 3, 0.5 acre source area","page":37,"quote":null}},{"id":"16f057f81c4619cd","parameter":"Tungsten (as sodium tungstate dihydride)","value":"8.2E+02","value_num":820,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","commercial/industrial land use, 30 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 2, Commercial/Industrial Soil, TotSoilComb, 30 acre source area","page":37,"quote":null}},{"id":"84e96a043666a3ec","parameter":"Tungsten (as sodium tungstate dihydride)","value":"1.2E+02","value_num":120,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","commercial/industrial land use, 30 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 2, Commercial/Industrial Soil, GWSoilIng, 30 acre source area","page":37,"quote":null}},{"id":"93f0e1a36e14ad86","parameter":"Tungsten (as sodium tungstate dihydride)","value":"1.2E+04","value_num":12000,"unit":"mg/kg","direction":"max","kind":"threshold","medium":"soil","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","commercial/industrial land use, 30 acre source area"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 2, Commercial/Industrial Soil, GWSoilClass 3, 30 acre source area","page":37,"quote":null}},{"id":"ee1dc6127af14cb6","parameter":"Tungsten (as sodium tungstate dihydride)","value":"2.4E-02","value_num":0.024,"unit":"mg/L","direction":"max","kind":"threshold","medium":"groundwater","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","residential land use"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 3, Groundwater, GWGWIng, Residential","page":50,"quote":null}},{"id":"59e897d651c96fc5","parameter":"Tungsten (as sodium tungstate dihydride)","value":"2.4E+00","value_num":2.4,"unit":"mg/L","direction":"max","kind":"threshold","medium":"groundwater","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","residential land use"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 3, Groundwater, GWGWClass3, Residential","page":50,"quote":null}},{"id":"0de2cb80cdffd4dc","parameter":"Tungsten (as sodium tungstate dihydride)","value":"7.3E-02","value_num":0.073,"unit":"mg/L","direction":"max","kind":"threshold","medium":"groundwater","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","commercial/industrial land use"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 3, Groundwater, GWGWIng, Commercial/Industrial","page":50,"quote":null}},{"id":"ad9c614ef9110f7a","parameter":"Tungsten (as sodium tungstate dihydride)","value":"7.3E+00","value_num":7.3,"unit":"mg/L","direction":"max","kind":"threshold","medium":"groundwater","level":"regional","parameter_key":"cas:7440-33-7","place":["US-TX"],"conditions":["1 In accordance with §350.72(b), when establishing Tier 1 PCLs for individual COCs for each of the individual and combined human health exposure pathways, the person must evaluate whether the PCLs need to be adjusted to lower concentrations to meet the cumulative carcinogenic risk level and hazard index criteria specified in §350.72(c). For COCs which exhibit both carcinogenic and noncarcinogenic characteristics, they shall be evaluated as both a carcinogen and noncarcinogen when determining whether the PCL established for an individual COC for each of the individual and combined human health exposure pathways needs to be adjusted to a lower concentration to meet the cumulative risk and hazard criteria. The person shall then use the lower of the carcinogenic or noncarcinogenic PCL as the Tier 1 human health PCL. In other words, the Tier 1 PCLs provided in this table for an individual COC should not be used as the final Tier 1 human health PCL for any of the individual or combined exposure pathways in cases where there are more than 10 carcinogenic and/or more than 10 noncarcinogenic COCs within a source medium unless it can be demonstrated that further downward adjustment is not necessary to meet the cumulative risk and hazard criteria.","commercial/industrial land use"],"cite":{"instrument":"us_tx_trrp_pcl","title":"Texas Risk Reduction Program (30 TAC Chapter 350): Tier 1 protective concentration levels — Table 1 Residential Soil, Table 2 Commercial/Industrial Soil, Table 3 Groundwater (residential and commercial/industrial)","issuer":"Texas Commission on Environmental Quality (TCEQ)","edition":"TRRP Tier 1 PCL tables, Last Revised: February 6, 2025 (TCEQ, PDF version)","source_url":"https://www.tceq.texas.gov/downloads/remediation/trrp/2025-pcl-tables-6-february-2025-final.pdf","source_sha256":"fb90ae0c95044f80cf21c83087ddbdc18ceee259ef8a6531887cc5c454d67686","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"TRRP Table 3, Groundwater, GWGWClass3, Commercial/Industrial","page":50,"quote":null}},{"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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 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":"not verified"},"section":"40 CFR 421.312 (BPT)","page":null,"quote":"Tungsten 758.900 303.100"}},{"id":"7ea0cfac69758a72","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 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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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":"not verified"},"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 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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 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