{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"1800823","name":"Chesapeake Minerals","status":"Active","status_date":"2025-05-21","mine_type":"Surface","coal_metal":"M","commodity":"Quartz, Ground","state":"MD","county":"Cecil","nearest_town":"Port Deposit","operator_id":"L00964","operator_name":"York Building Products","controller_id":"0113025","controller_name":"David J  Stewart","district":"M2","office":"Kutztown PA Field Office","employees":10,"latitude":39.6125,"longitude":-76.024444},"coverage":{"contributingSources":13,"registeredSources":20,"sourceRows":441},"relationships":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"1800823","name":"Chesapeake Minerals"},"operator":{"type":"operator","id":"L00964","name":"York Building Products"},"controller":{"type":"controller","id":"0113025","name":"David J  Stewart"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00824","name":"Robert H Stewart III et al"},"object":{"type":"mine","id":"1800823","name":"Chesapeake Minerals"},"validFrom":"1950-01-01","validTo":"2022-09-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800823|M00824|1950-01-01|2022-09-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0113025","name":"David J  Stewart"},"object":{"type":"mine","id":"1800823","name":"Chesapeake Minerals"},"validFrom":"2022-09-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800823|0113025|2022-09-09|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00964","name":"York Building Products"},"object":{"type":"mine","id":"1800823","name":"Chesapeake Minerals"},"validFrom":"2025-05-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800823|L00964|2025-05-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0113025","name":"David J  Stewart"},"object":{"type":"operator","id":"L00964","name":"York Building Products"},"validFrom":"2025-05-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"1800823","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800823|L00964|2025-05-12|0113025|2022-09-09|21031"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00824","name":"Robert H Stewart III et al"},"object":{"type":"operator","id":"L00964","name":"York Building Products"},"validFrom":"2025-05-12","validTo":"2022-09-08","current":false,"derived":true,"evidenceMineId":"1800823","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800823|L00964|2025-05-12|M00824|1950-01-01|115029"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-accidents","name":"Accident, Injuries, and Illnesses","domains":["safety","contractors"],"products":["incident trends","severity rates","equipment patterns","peer denominators"],"rowCount":1,"firstDate":"2026-05-04","lastDate":"2026-05-04","metrics":{"daysLost":0,"injuries":1,"fatalities":0,"recentRows":1,"restrictedDays":0,"contractorRecords":1},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"126107","DOCUMENT_NO":"220261260001","ACCIDENT_DT":"05/04/2026","DEGREE_INJURY":"NO DYS AWY FRM WRK,NO RSTR ACT","CLASSIFICATION":"HANDLING OF MATERIALS","ACCIDENT_TYPE":"Caught in, under or between a moving and a stationary object","OCCUPATION":"Plumber, Pipefitter, Millwright","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"Removing a rubber liner in valve, right pinky got pinched in the valve.","sourceDate":"2026-05-04"}]},{"id":"msha-addresses","name":"Addresses of Record","domains":["identity","logistics"],"products":["entity resolution","address history","facility geocoding"],"rowCount":1,"firstDate":"2025-05-21","lastDate":"2025-05-21","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-area-samples","name":"Metal and Nonmetal Area Samples","domains":["health","safety"],"products":["area contaminant trends","result-to-standard context","sampling recency"],"rowCount":4,"firstDate":"2026-01-13","lastDate":"2026-01-13","metrics":{"recentRows":4,"actionTaken":4,"concentrationTotal":0},"periods":{},"recentRecords":[]},{"id":"msha-assessed-violations","name":"Assessed Violations","domains":["compliance","legal"],"products":["penalty lifecycle","paid and outstanding amounts","assessment aging"],"rowCount":6,"firstDate":"2025-05-21","lastDate":"2026-05-07","metrics":{"ss":1,"delinquent":6,"recentRows":6,"paidPenalty":906,"proposedPenalty":906,"currentAssessment":906},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"3036888","VIOLATION_NO":"5073573","ISSUE_DT":"05/07/2026","CFR_STANDARD_CD":"56.12032","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"151.00","CURRENT_ASSESSMENT_AMT":"151.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2026-05-07"},{"SOURCE_ROW_NUMBER":"3036887","VIOLATION_NO":"5073572","ISSUE_DT":"05/07/2026","CFR_STANDARD_CD":"56.14112(b)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"151.00","CURRENT_ASSESSMENT_AMT":"151.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2026-05-07"},{"SOURCE_ROW_NUMBER":"1634283","VIOLATION_NO":"9608476","ISSUE_DT":"11/24/2025","CFR_STANDARD_CD":"56.5001(a)/56.5005","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"151.00","CURRENT_ASSESSMENT_AMT":"151.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2025-11-24"},{"SOURCE_ROW_NUMBER":"2974932","VIOLATION_NO":"9809396","ISSUE_DT":"06/04/2025","CFR_STANDARD_CD":"56.5001(a)/.5005","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"151.00","CURRENT_ASSESSMENT_AMT":"151.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2025-06-04"},{"SOURCE_ROW_NUMBER":"2974931","VIOLATION_NO":"9809393","ISSUE_DT":"05/21/2025","CFR_STANDARD_CD":"56.15004","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"151.00","CURRENT_ASSESSMENT_AMT":"151.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2025-05-21"},{"SOURCE_ROW_NUMBER":"2974930","VIOLATION_NO":"9809392","ISSUE_DT":"05/21/2025","CFR_STANDARD_CD":"56.12032","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"151.00","CURRENT_ASSESSMENT_AMT":"151.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2025-05-21"}]},{"id":"msha-contractor-production-quarterly","name":"Contractor Employment and Production — Quarterly","domains":["contractors","production","safety"],"products":["contractor exposure denominator","productivity","presence windows"],"rowCount":348,"firstDate":null,"lastDate":null,"metrics":{"linkedContractors":1,"notMineAttributable":1},"periods":{},"recentRecords":[]},{"id":"msha-contractor-production-yearly","name":"Contractor Employment and Production — Yearly","domains":["contractors","production","safety"],"products":["long-run contractor trend","annual denominator reconciliation"],"rowCount":45,"firstDate":null,"lastDate":null,"metrics":{"linkedContractors":1,"notMineAttributable":1},"periods":{},"recentRecords":[]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":2,"firstDate":"2025-05-12","lastDate":"2025-05-12","metrics":{"recentRows":2,"currentOperatorTenures":2,"completedOperatorTenures":0},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":5,"firstDate":"2025-05-21","lastDate":"2026-05-06","metrics":{"inspectors":8,"recentRows":5,"onSiteHours":50.5,"inspectionHours":100.5,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"182942","EVENT_NO":"F03DDB7","INSPECTION_BEGIN_DT":"05/06/2026","INSPECTION_END_DT":"05/08/2026","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"21.75","SUM_TOTAL_ON_SITE_HOURS":"13","sourceDate":"2026-05-06"},{"SOURCE_ROW_NUMBER":"293210","EVENT_NO":"F025355","INSPECTION_BEGIN_DT":"01/12/2026","INSPECTION_END_DT":"02/05/2026","ACTIVITY_CODE":"E15","ACTIVITY":"Compliance Follow-up Inspection","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"22.5","SUM_TOTAL_ON_SITE_HOURS":"12","sourceDate":"2026-01-12"},{"SOURCE_ROW_NUMBER":"888530","EVENT_NO":"6218046","INSPECTION_BEGIN_DT":"11/12/2025","INSPECTION_END_DT":"11/13/2025","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"30.75","SUM_TOTAL_ON_SITE_HOURS":"13","sourceDate":"2025-11-12"},{"SOURCE_ROW_NUMBER":"382601","EVENT_NO":"F016360","INSPECTION_BEGIN_DT":"06/11/2025","INSPECTION_END_DT":"08/25/2025","ACTIVITY_CODE":"E15","ACTIVITY":"Compliance Follow-up Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4.25","SUM_TOTAL_ON_SITE_HOURS":"0","sourceDate":"2025-06-11"},{"SOURCE_ROW_NUMBER":"627905","EVENT_NO":"F0160F6","INSPECTION_BEGIN_DT":"05/21/2025","INSPECTION_END_DT":"06/04/2025","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"3","SUM_TOTAL_INSP_HOURS":"21.25","SUM_TOTAL_ON_SITE_HOURS":"12.5","sourceDate":"2025-05-21"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":10,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2026-Q2":{"hours":9266,"employees":17,"production":0},"2026-Q1":{"hours":8241,"employees":17,"production":0},"2025-Q4":{"hours":8871,"employees":16,"production":0},"2025-Q3":{"hours":6720,"employees":13,"production":0},"2025-Q2":{"hours":6804,"employees":14,"production":0}},"recentRecords":[]},{"id":"msha-mine-production-yearly","name":"Mine Employment and Production — Yearly","domains":["production","safety","compliance"],"products":["annual trend","backfill","quarterly reconciliation"],"rowCount":4,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2025":{"hours":22395,"employees":14,"production":0},"2026":{"hours":17507,"employees":17,"production":0}},"recentRecords":[]},{"id":"msha-mines","name":"Mines","domains":["identity","production","logistics"],"products":["mine identity","status","commodity","location","operator and controller"],"rowCount":1,"firstDate":null,"lastDate":null,"metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-personal-health-samples","name":"Metal and Nonmetal Personal Health Samples","domains":["health","safety"],"products":["personal exposure trend","occupation patterns","analyte coverage"],"rowCount":7,"firstDate":"2025-05-21","lastDate":"2026-01-13","metrics":{"recentRows":7,"actionTaken":7,"maxExposureRatio":3.54,"overExposureLimit":3,"exposureRatioTotal":8.61},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"307494","EVENT_NO":"F025355","SAMPLE_NO":"000000202600088000","SAMPLE_DATE":"01/13/2026","CONTAMINANT_DESC":"Quartz, respirable, >1% Qtz","CONCENTRATION":"0000.29","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Lab Technician","ACTION_TAKEN_DESC":"CITATION/ORDER ISSUED","sourceDate":"2026-01-13"},{"SOURCE_ROW_NUMBER":"307493","EVENT_NO":"F025355","SAMPLE_NO":"000000202600087900","SAMPLE_DATE":"01/13/2026","CONTAMINANT_DESC":"Quartz, respirable, >1% Qtz","CONCENTRATION":"0000.24","EXPOSURE_LIMIT":"0000.14","C_OVER_E":"01.71","JOB_CD_DESC":"Lab Technician","ACTION_TAKEN_DESC":"CITATION/ORDER ISSUED","sourceDate":"2026-01-13"},{"SOURCE_ROW_NUMBER":"302791","EVENT_NO":"6218046","SAMPLE_NO":"000000202504989700","SAMPLE_DATE":"11/13/2025","CONTAMINANT_DESC":"Quartz, respirable, >1% Qtz","CONCENTRATION":"0000.47","EXPOSURE_LIMIT":"0000.14","C_OVER_E":"03.36","JOB_CD_DESC":"Lab Technician","ACTION_TAKEN_DESC":"CITATION/ORDER TERMINATED","sourceDate":"2025-11-13"},{"SOURCE_ROW_NUMBER":"302790","EVENT_NO":"6218046","SAMPLE_NO":"000000202504989600","SAMPLE_DATE":"11/13/2025","CONTAMINANT_DESC":"Respirable dust, <.1mg","CONCENTRATION":"0000.00","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Front-end Loader Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2025-11-13"},{"SOURCE_ROW_NUMBER":"302789","EVENT_NO":"6218046","SAMPLE_NO":"000000202504989500","SAMPLE_DATE":"11/13/2025","CONTAMINANT_DESC":"Respirable dust, <.1mg","CONCENTRATION":"0000.00","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Dry Screen Plant Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2025-11-13"},{"SOURCE_ROW_NUMBER":"299378","EVENT_NO":"F0160F6","SAMPLE_NO":"000000202502160100","SAMPLE_DATE":"05/21/2025","CONTAMINANT_DESC":"Respirable dust, <.1mg","CONCENTRATION":"0000.00","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Front-end Loader Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2025-05-21"},{"SOURCE_ROW_NUMBER":"299377","EVENT_NO":"F0160F6","SAMPLE_NO":"000000202502160000","SAMPLE_DATE":"05/21/2025","CONTAMINANT_DESC":"Quartz, respirable, >1% Qtz","CONCENTRATION":"0000.46","EXPOSURE_LIMIT":"0000.13","C_OVER_E":"03.54","JOB_CD_DESC":"Dry Screen Plant Operator","ACTION_TAKEN_DESC":"CITATION/ORDER EXTENDED","sourceDate":"2025-05-21"}]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":7,"firstDate":"2025-05-21","lastDate":"2026-05-07","metrics":{"ss":1,"amountDue":906,"contested":0,"amountPaid":906,"recentRows":7,"section104d":0,"unterminated":2,"proposedPenalty":906},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1264785","VIOLATION_NO":"5073573","VIOLATION_ISSUE_DT":"05/07/2026","SIG_SUB":"N","PART_SECTION":"56.12032","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"05/07/2026","PROPOSED_PENALTY":"151","AMOUNT_DUE":"151","AMOUNT_PAID":"151","CONTESTED_IND":"N","sourceDate":"2026-05-07"},{"SOURCE_ROW_NUMBER":"1264784","VIOLATION_NO":"5073572","VIOLATION_ISSUE_DT":"05/07/2026","SIG_SUB":"N","PART_SECTION":"56.14112(b)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Permanent","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"05/07/2026","PROPOSED_PENALTY":"151","AMOUNT_DUE":"151","AMOUNT_PAID":"151","CONTESTED_IND":"N","sourceDate":"2026-05-07"},{"SOURCE_ROW_NUMBER":"1264783","VIOLATION_NO":"9608478","VIOLATION_ISSUE_DT":"02/05/2026","PART_SECTION":"56.5001(a)/56.5005","CIT_ORD_SAFE":"Order","NO_AFFECTED":"0","CONTESTED_IND":"N","sourceDate":"2026-02-05"},{"SOURCE_ROW_NUMBER":"1264789","VIOLATION_NO":"9608476","VIOLATION_ISSUE_DT":"11/24/2025","SIG_SUB":"N","PART_SECTION":"56.5001(a)/56.5005","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Permanent","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","PROPOSED_PENALTY":"151","AMOUNT_DUE":"151","AMOUNT_PAID":"151","CONTESTED_IND":"N","sourceDate":"2025-11-24"},{"SOURCE_ROW_NUMBER":"1264788","VIOLATION_NO":"9809396","VIOLATION_ISSUE_DT":"06/04/2025","SIG_SUB":"N","PART_SECTION":"56.5001(a)/.5005","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Permanent","NO_AFFECTED":"2","NEGLIGENCE":"LowNegligence","TERMINATION_DT":"11/24/2025","PROPOSED_PENALTY":"151","AMOUNT_DUE":"151","AMOUNT_PAID":"151","CONTESTED_IND":"N","sourceDate":"2025-06-04"},{"SOURCE_ROW_NUMBER":"1264787","VIOLATION_NO":"9809393","VIOLATION_ISSUE_DT":"05/21/2025","SIG_SUB":"Y","PART_SECTION":"56.15004","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"Permanent","NO_AFFECTED":"1","NEGLIGENCE":"LowNegligence","TERMINATION_DT":"05/21/2025","PROPOSED_PENALTY":"151","AMOUNT_DUE":"151","AMOUNT_PAID":"151","CONTESTED_IND":"N","sourceDate":"2025-05-21"},{"SOURCE_ROW_NUMBER":"1264786","VIOLATION_NO":"9809392","VIOLATION_ISSUE_DT":"05/21/2025","SIG_SUB":"N","PART_SECTION":"56.12032","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"LowNegligence","TERMINATION_DT":"05/21/2025","PROPOSED_PENALTY":"151","AMOUNT_DUE":"151","AMOUNT_PAID":"151","CONTESTED_IND":"N","sourceDate":"2025-05-21"}]}],"safety":{"href":"/api/v1/mines/1800823/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/1800823/silica","description":"Dedicated silica records, measurements, sample status and trends. Defaults to the snapshot year; use year=all for history."},"externalContext":{"eia":null,"title30":{"snapshot":{"chapterCount":6,"featuredSectionCount":100,"latestAmendedOn":"2026-08-14","latestIssueDate":"2026-08-14","partCount":206,"sectionCount":5954,"upToDateAsOf":"2026-08-19"},"regulations":[{"chapter":"I","heading":"Inspection and cover plates.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032","part":"56","subchapter":"K","subpart":"K","id":"56.12032","citation":"30 CFR 56.12032","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","partHeading":"PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES","subpartHeading":"","text":null,"occurrenceCount":2},{"chapter":"I","heading":"Construction and maintenance of guards.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112","part":"56","subchapter":"K","subpart":"M","id":"56.14112","citation":"30 CFR 56.14112","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","partHeading":"PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES","subpartHeading":"","text":null,"occurrenceCount":1},{"chapter":"I","heading":"Exposure limits for airborne contaminants.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5001","part":"56","subchapter":"K","subpart":"D","id":"56.5001","citation":"30 CFR 56.5001","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","partHeading":"PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES","subpartHeading":"","text":null,"occurrenceCount":3},{"chapter":"I","heading":"Eye protection.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15004","part":"56","subchapter":"K","subpart":"N","id":"56.15004","citation":"30 CFR 56.15004","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","partHeading":"PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES","subpartHeading":"","text":null,"occurrenceCount":1}],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"1800823","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}