{"dataset_id": "EPA-EHS-CAA-CWA-2026-0001", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 122.41(l)(4); 40 CFR 122.41(l)(7)", "facility_naics_sic": "322110 Pulp Mills", "parameter_or_pollutant": "TSS", "synthetic": true, "facility_name": "Cedarbar Pulp Mill, fictional", "permit_id": "SYNTH-NPDES-0001", "industry": "Pulp mills"}, "input": {"facility_context": "SYNTHETIC record. Cedarbar Pulp Mill, fictional, has no real EPA ECHO identity. NPDES permit SYNTH-NPDES-0001, Outfall 001, process wastewater after primary clarification. Total suspended solids monthly-average limit 30 mg/L; daily-maximum limit 45 mg/L. Monitoring frequency: 3 grab samples per week; monthly average is the arithmetic mean. TSS is a Group I pollutant under Appendix A to 40 CFR 123.45. Technical Review Criteria factor 1.4 times 30 mg/L = 42.0 mg/L. Both March and April 2026 monthly averages are at or above that threshold inside one six-month review period, which is the Category I monthly-average magnitude criterion. The metric below uses the April average. Noncompliance days are March 1 through April 30, 2026 (61 days).", "monitoring_log_excerpt": "SYNTHETIC DMR — Cedarbar Pulp Mill, fictional — SYNTH-NPDES-0001 — Outfall 001 — TSS mg/L\nperiod_end | base | reported | monthly_avg_limit | daily_max_limit\n2026-03-31 | monthly average | 43.2 | 30 | 45\n2026-04-30 | monthly average | 46.5 | 30 | 45\n2026-04-30 | daily maximum | 51.0 | 30 | 45"}, "output": {"violation_classification": "Category I effluent noncompliance — monthly average magnitude at or above TRC in two months of a six-month period", "exceedance_metrics": {"permitted_limit": "30 mg/L", "reported_value": "46.5 mg/L", "percentage_over_limit": "55.0%"}, "statutory_reporting_deadline": "Report with the Discharge Monitoring Report at the time monitoring reports are submitted under 40 CFR 122.41(l)(7). DMR timing is permit-specified under 40 CFR 122.41(l)(4); this synthetic permit requires the DMR by the 28th day of the following month. That date is a condition of this fictional permit, not a universal statutory deadline.", "mandatory_containment_procedure": "Isolate the primary clarifier that is carrying the high solids load and stop discharge from Outfall 001. Divert process wastewater to the lined equalization tank. Restore clarifier blanket level and polymer feed, then collect a new composite at the outfall before resuming discharge. Report the measured values as analyzed. Do not revise the DMR to hide the monthly averages, and do not bypass the clarifier to the river.", "statutory_penalty_bracket": "CWA §309(d) civil judicial: $68,445 per day (40 CFR 19, 2025 adjustment) x 61 days = $4,175,145 statutory maximum exposure", "noncompliance_days": 61, "penalty_authority": "CWA-309(d)"}}
{"dataset_id": "EPA-EHS-CAA-CWA-2026-0002", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 122.41(l)(4); 40 CFR 122.41(l)(7)", "facility_naics_sic": "311615 Poultry Processing", "parameter_or_pollutant": "BOD5", "synthetic": true, "facility_name": "Redlane Poultry Processing, fictional", "permit_id": "SYNTH-NPDES-0002", "industry": "Poultry processing"}, "input": {"facility_context": "SYNTHETIC record. Redlane Poultry Processing, fictional. Permit SYNTH-NPDES-0002, Outfall 001, treated process wastewater. BOD5 monthly-average limit 25 mg/L; daily-maximum limit 40 mg/L. Monitoring: 24-hour composite, twice per week. BOD5 is a Group I oxygen-demand pollutant. TRC 1.4 times 25 mg/L = 35.0 mg/L. January and February 2026 monthly averages both exceed that value. The metric uses the February monthly average. Noncompliance days are the 31 days of January plus the 28 days of February 2026.", "monitoring_log_excerpt": "SYNTHETIC DMR — Redlane Poultry Processing, fictional — SYNTH-NPDES-0002 — BOD5 mg/L\nperiod_end | base | reported | monthly_avg_limit\n2026-01-31 | monthly average | 36.0 | 25\n2026-02-28 | monthly average | 38.5 | 25"}, "output": {"violation_classification": "Category I effluent noncompliance — monthly average magnitude at or above TRC in two months of a six-month period", "exceedance_metrics": {"permitted_limit": "25 mg/L", "reported_value": "38.5 mg/L", "percentage_over_limit": "54.0%"}, "statutory_reporting_deadline": "Report with the Discharge Monitoring Report at the time monitoring reports are submitted under 40 CFR 122.41(l)(7). DMR timing is permit-specified under 40 CFR 122.41(l)(4); this synthetic permit requires the DMR by the 28th day of the following month. That date is a condition of this fictional permit, not a universal statutory deadline.", "mandatory_containment_procedure": "Stop the Outfall 001 discharge. Isolate the slaughter and further-processing floor drains from the final effluent flume and divert flow to the anaerobic holding lagoon. Reduce kill-floor loading until aeration-basin dissolved oxygen and effluent BOD5 are back within the permit. Resample the outfall with a 24-hour composite before restarting discharge, and notify the permitting authority with the measured results.", "statutory_penalty_bracket": "CWA §309(d) civil judicial: $68,445 per day (40 CFR 19, 2025 adjustment) x 59 days = $4,038,255 statutory maximum exposure", "noncompliance_days": 59, "penalty_authority": "CWA-309(d)"}}
{"dataset_id": "EPA-EHS-CAA-CWA-2026-0003", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 122.41(l)(6); 40 CFR 122.44(g)", "facility_naics_sic": "212210 Iron Ore Mining", "parameter_or_pollutant": "TSS", "synthetic": true, "facility_name": "Ironmesa Ore Company, fictional", "permit_id": "SYNTH-NPDES-0003", "industry": "Iron ore mining"}, "input": {"facility_context": "SYNTHETIC record. Ironmesa Ore Company, fictional. Permit SYNTH-NPDES-0003, Outfall 002, tailings-pond decant. TSS daily-maximum limit 45 mg/L; monthly-average limit 30 mg/L. Monitoring: weekly grab. The 2026-05-12 grab is over the daily maximum. The May monthly average in this excerpt is 27 mg/L, under the monthly average limit, and no second month is over the Group I TRC of 1.4 times the monthly limit. This is a permit violation. It is not Category I monthly-average magnitude or chronic noncompliance under Appendix A to 40 CFR 123.45.", "monitoring_log_excerpt": "SYNTHETIC monitoring log — Ironmesa Ore Company, fictional — SYNTH-NPDES-0003 — TSS\nsample_datetime | type | result_mg_L | daily_max_limit | monthly_avg_to_date\n2026-05-05 09:10 | grab | 22.0 | 45 |\n2026-05-12 09:40 | grab | 52.3 | 45 |\n2026-05-31 | monthly average | 27 | 30 monthly limit |"}, "output": {"violation_classification": "Effluent violation — single-sample or daily-maximum excursion, not Category I magnitude or chronic SNC", "exceedance_metrics": {"permitted_limit": "45 mg/L", "reported_value": "52.3 mg/L", "percentage_over_limit": "16.2%"}, "statutory_reporting_deadline": "Oral report within 24 hours of becoming aware of the noncompliance, and a written submission within 5 days, under 40 CFR 122.41(l)(6). The written submission must describe the noncompliance and its cause, the period of noncompliance including exact dates and times, and the steps taken or planned to reduce, eliminate, and prevent reoccurrence. This fictional permit lists the violated maximum-daily limit for 24-hour reporting under 40 CFR 122.41(l)(6)(ii)(C) and 40 CFR 122.44(g).", "mandatory_containment_procedure": "Stop the tailings-pond decant at Outfall 002. Isolate the pond discharge valve and hold water in the pond. Inspect the decant intake for short-circuiting of unsettled fines, and do not open an emergency spillway to the creek. Resample the decant after solids have settled and resume only when the grab is at or below the daily maximum. Report the 52.3 mg/L result as measured.", "statutory_penalty_bracket": "CWA §309(g)(2)(B) Class II administrative: $27,378 per day (40 CFR 19, 2025 adjustment) x 1 days = $27,378 statutory maximum exposure (product is under the $342,218 total maximum in 40 CFR 19.4)", "noncompliance_days": 1, "penalty_authority": "CWA-309(g)(2)(B)"}}
{"dataset_id": "EPA-EHS-CAA-CWA-2026-0004", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 122.41(l)(6); 40 CFR 122.44(g)", "facility_naics_sic": "325199 All Other Basic Organic Chemical Manufacturing", "parameter_or_pollutant": "benzene", "synthetic": true, "facility_name": "Hillcrest Organic Chemicals, fictional", "permit_id": "SYNTH-NPDES-0004", "industry": "All other basic organic chemical manufacturing"}, "input": {"facility_context": "SYNTHETIC record. Hillcrest Organic Chemicals, fictional. Permit SYNTH-NPDES-0004, Outfall 001, process wastewater after steam stripping. Benzene daily-maximum limit 0.050 mg/L. Monitoring: daily grab while the aromatic unit is operating. Benzene is an organic pollutant and is Group II under Appendix A to 40 CFR 123.45 (TRC 1.2). One grab on 2026-06-03 is over the daily maximum. A single day does not meet the two-month monthly-average magnitude test or the four-month chronic test. The fictional permit lists this benzene daily maximum for 24-hour reporting.", "monitoring_log_excerpt": "SYNTHETIC process-wastewater log — Hillcrest Organic Chemicals, fictional — SYNTH-NPDES-0004\nsample_datetime | parameter | result_mg_L | daily_max_mg_L\n2026-06-02 14:00 | benzene | 0.031 | 0.050\n2026-06-03 14:05 | benzene | 0.071 | 0.050\n2026-06-04 14:00 | benzene | 0.028 | 0.050"}, "output": {"violation_classification": "Effluent violation — single-sample or daily-maximum excursion, not Category I magnitude or chronic SNC", "exceedance_metrics": {"permitted_limit": "0.050 mg/L", "reported_value": "0.071 mg/L", "percentage_over_limit": "42.0%"}, "statutory_reporting_deadline": "Oral report within 24 hours of becoming aware of the noncompliance, and a written submission within 5 days, under 40 CFR 122.41(l)(6). The written submission must describe the noncompliance and its cause, the period of noncompliance including exact dates and times, and the steps taken or planned to reduce, eliminate, and prevent reoccurrence. This fictional permit lists the violated maximum-daily limit for 24-hour reporting under 40 CFR 122.41(l)(6)(ii)(C) and 40 CFR 122.44(g).", "mandatory_containment_procedure": "Stop discharge from Outfall 001. Isolate the aromatic-unit sewer from the effluent sump and divert that wastewater to the covered process tank feeding the steam stripper. Do not bypass the stripper to the outfall. Restore stripper steam rate, resample benzene at the outfall, and restart discharge only after a grab is at or below 0.050 mg/L. Notify the permitting authority with the unaltered laboratory result.", "statutory_penalty_bracket": "CWA §309(d) civil judicial: $68,445 per day (40 CFR 19, 2025 adjustment) x 1 days = $68,445 statutory maximum exposure", "noncompliance_days": 1, "penalty_authority": "CWA-309(d)"}}
{"dataset_id": "EPA-EHS-CAA-CWA-2026-0005", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 419.22(e)(1); 40 CFR 122.41(l)(6)", "facility_naics_sic": "324110 Petroleum Refineries", "parameter_or_pollutant": "oil and grease", "synthetic": true, "facility_name": "Northfork Refining, fictional", "permit_id": "SYNTH-NPDES-0005", "industry": "Petroleum refineries"}, "input": {"facility_context": "SYNTHETIC record. Northfork Refining, fictional. Permit SYNTH-NPDES-0005 applies the contaminated-runoff BPT concentration in 40 CFR 419.22(e)(1) to stormwater that is solely contaminated runoff and is not commingled with process wastewater: oil and grease shall not exceed 15 mg/L on any single grab or composite. Monitoring: each discharge event, grab. The 2026-07-18 grab exceeds 15 mg/L. This is one discharge event, not a two-month monthly-average TRC pattern. Oil and grease is a Group I pollutant if a monthly average were being scored.", "monitoring_log_excerpt": "SYNTHETIC stormwater grab — Northfork Refining, fictional — SYNTH-NPDES-0005 — runoff pond\nsample_datetime | matrix | oil_and_grease_mg_L | limit_mg_L | commingled_with_process\n2026-07-18 16:20 | contaminated runoff only | 22.5 | 15 | no"}, "output": {"violation_classification": "Effluent violation — single-sample or daily-maximum excursion, not Category I magnitude or chronic SNC", "exceedance_metrics": {"permitted_limit": "15 mg/L", "reported_value": "22.5 mg/L", "percentage_over_limit": "50.0%"}, "statutory_reporting_deadline": "Oral report within 24 hours of becoming aware of the noncompliance, and a written submission within 5 days, under 40 CFR 122.41(l)(6). The written submission must describe the noncompliance and its cause, the period of noncompliance including exact dates and times, and the steps taken or planned to reduce, eliminate, and prevent reoccurrence. This fictional permit lists the violated maximum-daily limit for 24-hour reporting under 40 CFR 122.41(l)(6)(ii)(C) and 40 CFR 122.44(g).", "mandatory_containment_procedure": "Stop the runoff-pond discharge. Close the outfall valve and keep the water in the pond. Isolate the tank-farm drainage that is sending oil to the pond and skim or pump free oil to the slop-oil tank. Do not open a bypass around the pond. Resample oil and grease before any discharge, and report the 22.5 mg/L grab as analyzed.", "statutory_penalty_bracket": "CWA §309(d) civil judicial: $68,445 per day (40 CFR 19, 2025 adjustment) x 1 days = $68,445 statutory maximum exposure", "noncompliance_days": 1, "penalty_authority": "CWA-309(d)"}}
{"dataset_id": "EPA-EHS-CAA-CWA-2026-0006", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 419.22(a); 40 CFR 122.41(l)(6)", "facility_naics_sic": "324110 Petroleum Refineries", "parameter_or_pollutant": "pH", "synthetic": true, "facility_name": "Northfork Refining, fictional", "permit_id": "SYNTH-NPDES-0005", "industry": "Petroleum refineries"}, "input": {"facility_context": "SYNTHETIC record. Northfork Refining, fictional, cracking-subcategory process wastewater. 40 CFR 419.22(a) footnote 2 requires pH within the range of 6.0 to 9.0. Permit SYNTH-NPDES-0005 states that range. The metric uses the upper bound 9.0 SU as the permitted limit because the excursion is alkaline. Continuous pH recorder with a daily grab confirmation. pH is not given a 1.4 or 1.2 TRC in Appendix A to 40 CFR 123.45, so this is not labeled a TRC monthly-average SNC. The excursion lasted one operating day.", "monitoring_log_excerpt": "SYNTHETIC pH log — Northfork Refining, fictional — SYNTH-NPDES-0005 — Outfall 001\ndatetime | grab_pH_SU | permitted_range\n2026-08-02 08:00 | 7.6 | 6.0-9.0\n2026-08-02 15:30 | 10.4 | 6.0-9.0\n2026-08-03 08:00 | 7.9 | 6.0-9.0"}, "output": {"violation_classification": "Effluent violation — pH outside 6.0–9.0, not a TRC monthly-average SNC", "exceedance_metrics": {"permitted_limit": "9.0 SU", "reported_value": "10.4 SU", "percentage_over_limit": "15.6%"}, "statutory_reporting_deadline": "Oral report within 24 hours of becoming aware of the noncompliance, and a written submission within 5 days, under 40 CFR 122.41(l)(6). The written submission must describe the noncompliance and its cause, the period of noncompliance including exact dates and times, and the steps taken or planned to reduce, eliminate, and prevent reoccurrence. This fictional permit lists the violated maximum-daily limit for 24-hour reporting under 40 CFR 122.41(l)(6)(ii)(C) and 40 CFR 122.44(g).", "mandatory_containment_procedure": "Stop discharge at Outfall 001. Isolate the spent-caustic line that is reaching the effluent sump and divert the sump to the neutralization tank. Add acid only through the existing neutralization controls until a grab is inside 6.0 to 9.0. Resample before restarting the outfall. Do not dilute the sample or the discharge with firewater to disguise the pH, and report the 10.4 SU grab.", "statutory_penalty_bracket": "CWA §309(g)(2)(B) Class II administrative: $27,378 per day (40 CFR 19, 2025 adjustment) x 1 days = $27,378 statutory maximum exposure (product is under the $342,218 total maximum in 40 CFR 19.4)", "noncompliance_days": 1, "penalty_authority": "CWA-309(g)(2)(B)"}}
{"dataset_id": "EPA-EHS-CAA-CWA-2026-0007", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 122.41(l)(4); 40 CFR 122.41(l)(7)", "facility_naics_sic": "331110 Iron and Steel Mills and Ferroalloy Manufacturing", "parameter_or_pollutant": "oil and grease", "synthetic": true, "facility_name": "Blackriver Steel Works, fictional", "permit_id": "SYNTH-NPDES-0007", "industry": "Iron and steel mills and ferroalloy manufacturing"}, "input": {"facility_context": "SYNTHETIC record. Blackriver Steel Works, fictional. Permit SYNTH-NPDES-0007, Outfall 001, scale-pit effluent after the oil-water separator. Oil and grease monthly-average limit 10 mg/L. Monitoring: weekly grab; monthly average is the arithmetic mean. Oil and grease is Group I. TRC 1.4 times 10 mg/L = 14.0 mg/L. The September and October 2026 monthly averages are both at or above 14.0 mg/L. The metric uses the October average. Noncompliance days cover September 1 through October 31, 2026 (61 days).", "monitoring_log_excerpt": "SYNTHETIC DMR — Blackriver Steel Works, fictional — SYNTH-NPDES-0007 — oil and grease mg/L\nperiod_end | base | reported | monthly_avg_limit\n2026-09-30 | monthly average | 15.0 | 10\n2026-10-31 | monthly average | 16.4 | 10"}, "output": {"violation_classification": "Category I effluent noncompliance — monthly average magnitude at or above TRC in two months of a six-month period", "exceedance_metrics": {"permitted_limit": "10 mg/L", "reported_value": "16.4 mg/L", "percentage_over_limit": "64.0%"}, "statutory_reporting_deadline": "Report with the Discharge Monitoring Report at the time monitoring reports are submitted under 40 CFR 122.41(l)(7). DMR timing is permit-specified under 40 CFR 122.41(l)(4); this synthetic permit requires the DMR by the 28th day of the following month. That date is a condition of this fictional permit, not a universal statutory deadline.", "mandatory_containment_procedure": "Stop discharge from Outfall 001. Isolate the hot-mill scale pit from the outfall and divert pit water back through the oil-water separator into the containment sump. Remove accumulated oil from the separator and confirm the skimmer is running. Resample oil and grease before restoring the outfall. Keep the laboratory results unchanged on the DMR.", "statutory_penalty_bracket": "CWA §309(d) civil judicial: $68,445 per day (40 CFR 19, 2025 adjustment) x 61 days = $4,175,145 statutory maximum exposure", "noncompliance_days": 61, "penalty_authority": "CWA-309(d)"}}
{"dataset_id": "EPA-EHS-CAA-CWA-2026-0008", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 122.41(l)(6); 40 CFR 122.44(g)", "facility_naics_sic": "311615 Poultry Processing", "parameter_or_pollutant": "ammonia", "synthetic": true, "facility_name": "Redlane Poultry Processing, fictional", "permit_id": "SYNTH-NPDES-0002", "industry": "Poultry processing"}, "input": {"facility_context": "SYNTHETIC record. Redlane Poultry Processing, fictional. Permit SYNTH-NPDES-0002, Outfall 001. Ammonia as N monthly-average limit 8.0 mg/L. Monitoring: twice-weekly 24-hour composite. Inorganic nitrogen compounds are Group I under Appendix A to 40 CFR 123.45, so the TRC factor is 1.4, not the Group II factor of 1.2. 1.4 times 8.0 mg/L = 11.2 mg/L. May and June 2026 monthly averages are both above 11.2 mg/L. The metric uses the June average. The scenario counts the 30 days of June 2026 as the noncompliance period tied to that reported monthly average.", "monitoring_log_excerpt": "SYNTHETIC DMR — Redlane Poultry Processing, fictional — SYNTH-NPDES-0002 — ammonia as N mg/L\nperiod_end | base | reported | monthly_avg_limit | TRC_1.4_threshold\n2026-05-31 | monthly average | 12.6 | 8.0 | 11.2\n2026-06-30 | monthly average | 13.4 | 8.0 | 11.2"}, "output": {"violation_classification": "Category I effluent noncompliance — monthly average magnitude at or above TRC in two months of a six-month period", "exceedance_metrics": {"permitted_limit": "8.0 mg/L", "reported_value": "13.4 mg/L", "percentage_over_limit": "67.5%"}, "statutory_reporting_deadline": "Oral report within 24 hours of becoming aware of the noncompliance, and a written submission within 5 days, under 40 CFR 122.41(l)(6). The written submission must describe the noncompliance and its cause, the period of noncompliance including exact dates and times, and the steps taken or planned to reduce, eliminate, and prevent reoccurrence. This fictional permit lists the violated maximum-daily limit for 24-hour reporting under 40 CFR 122.41(l)(6)(ii)(C) and 40 CFR 122.44(g).", "mandatory_containment_procedure": "Stop the Outfall 001 discharge. Isolate the DAF effluent from the final flume and divert flow to the spare aeration basin. Keep the nitrification basin online and raise aeration; do not treat a sample to change the reported ammonia. Resample a 24-hour composite after the basin recovers, and restart discharge only when operations can meet the monthly-average limit.", "statutory_penalty_bracket": "CWA §309(d) civil judicial: $68,445 per day (40 CFR 19, 2025 adjustment) x 30 days = $2,053,350 statutory maximum exposure", "noncompliance_days": 30, "penalty_authority": "CWA-309(d)"}}
{"dataset_id": "EPA-EHS-CAA-CWA-2026-0009", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 122.41(l)(6); 40 CFR 122.44(g)", "facility_naics_sic": "322110 Pulp Mills", "parameter_or_pollutant": "BOD5", "synthetic": true, "facility_name": "Cedarbar Pulp Mill, fictional", "permit_id": "SYNTH-NPDES-0001", "industry": "Pulp mills"}, "input": {"facility_context": "SYNTHETIC record. Cedarbar Pulp Mill, fictional. Permit SYNTH-NPDES-0001, Outfall 001. BOD5 daily-maximum limit 40 mg/L; monthly-average limit 30 mg/L. Monitoring: 24-hour composite, three times per week. The 2026-05-11 composite exceeds the daily maximum. The May monthly average in the same log is 28 mg/L, under the monthly-average limit. One daily-maximum excursion is a permit violation and is not Category I monthly-average magnitude or chronic SNC.", "monitoring_log_excerpt": "SYNTHETIC DMR support log — Cedarbar Pulp Mill, fictional — SYNTH-NPDES-0001 — BOD5 mg/L\nsample_date | type | result | daily_max_limit | month_average\n2026-05-04 | 24-hour composite | 26.0 | 40 |\n2026-05-11 | 24-hour composite | 44.8 | 40 |\n2026-05-31 | monthly average | 28 | 30 monthly limit | 28"}, "output": {"violation_classification": "Effluent violation — single-sample or daily-maximum excursion, not Category I magnitude or chronic SNC", "exceedance_metrics": {"permitted_limit": "40 mg/L", "reported_value": "44.8 mg/L", "percentage_over_limit": "12.0%"}, "statutory_reporting_deadline": "Oral report within 24 hours of becoming aware of the noncompliance, and a written submission within 5 days, under 40 CFR 122.41(l)(6). The written submission must describe the noncompliance and its cause, the period of noncompliance including exact dates and times, and the steps taken or planned to reduce, eliminate, and prevent reoccurrence. This fictional permit lists the violated maximum-daily limit for 24-hour reporting under 40 CFR 122.41(l)(6)(ii)(C) and 40 CFR 122.44(g).", "mandatory_containment_procedure": "Stop discharge from Outfall 001 for the remainder of the operating day. Divert aeration-basin effluent to the spill containment pond. Reduce weak-liquor feed to the basin and restore dissolved oxygen. Collect a new 24-hour composite before resuming discharge. Report 44.8 mg/L as measured; do not drop the composite from the monthly average to improve the DMR.", "statutory_penalty_bracket": "CWA §309(g)(2)(B) Class II administrative: $27,378 per day (40 CFR 19, 2025 adjustment) x 1 days = $27,378 statutory maximum exposure (product is under the $342,218 total maximum in 40 CFR 19.4)", "noncompliance_days": 1, "penalty_authority": "CWA-309(g)(2)(B)"}}
{"dataset_id": "EPA-EHS-CAA-CWA-2026-0010", "metadata": {"statute": "Clean Water Act (NPDES)", "cfr_citation": "40 CFR 122.41(l)(6); 40 CFR 122.44(g)", "facility_naics_sic": "325199 All Other Basic Organic Chemical Manufacturing", "parameter_or_pollutant": "TSS", "synthetic": true, "facility_name": "Hillcrest Organic Chemicals, fictional", "permit_id": "SYNTH-NPDES-0004", "industry": "All other basic organic chemical manufacturing"}, "input": {"facility_context": "SYNTHETIC record. Hillcrest Organic Chemicals, fictional. Permit SYNTH-NPDES-0004, Outfall 002, utility wastewater. TSS daily-maximum limit 200 mg/L. Monitoring: one grab per discharge day. Two consecutive discharge days are represented by the 2026-09-15 result used in the metric. The monthly average is not at or above a TRC threshold in two months. The percentage is the half-up rounding of exactly 10.05 to one decimal place.", "monitoring_log_excerpt": "SYNTHETIC grab log — Hillcrest Organic Chemicals, fictional — SYNTH-NPDES-0004 — Outfall 002 TSS\nsample_date | result_mg_L | daily_max_limit_mg_L\n2026-09-14 | 190 | 200\n2026-09-15 | 220.1 | 200"}, "output": {"violation_classification": "Effluent violation — single-sample or daily-maximum excursion, not Category I magnitude or chronic SNC", "exceedance_metrics": {"permitted_limit": "200 mg/L", "reported_value": "220.1 mg/L", "percentage_over_limit": "10.1%"}, "statutory_reporting_deadline": "Oral report within 24 hours of becoming aware of the noncompliance, and a written submission within 5 days, under 40 CFR 122.41(l)(6). The written submission must describe the noncompliance and its cause, the period of noncompliance including exact dates and times, and the steps taken or planned to reduce, eliminate, and prevent reoccurrence. This fictional permit lists the violated maximum-daily limit for 24-hour reporting under 40 CFR 122.41(l)(6)(ii)(C) and 40 CFR 122.44(g).", "mandatory_containment_procedure": "Stop the Outfall 002 discharge. Isolate the cooling-tower sidestream filter that is discharging unsettled solids and divert that sidestream to the plant equalization tank. Backwash the filter to the tank, not to the outfall. Resample TSS before restarting the outfall and report 220.1 mg/L as measured.", "statutory_penalty_bracket": "CWA §309(d) civil judicial: $68,445 per day (40 CFR 19, 2025 adjustment) x 2 days = $136,890 statutory maximum exposure", "noncompliance_days": 2, "penalty_authority": "CWA-309(d)"}}