{"columns":[{"name":"code","type":"string"},{"name":"label","type":"string"},{"name":"description","type":"string"}],"n_rows":25,"rows_kept":25,"cut":false,"text_format":"parquet-jsonl-2026-10-02","bounds":{"document_bytes":16777216,"package_text_limit_bytes":33554432,"package_text_slack_bytes":1024,"rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096,"vector_min":64,"vector_head_fixed":16,"vector_head_variable":64,"kv_value_chars":1048576,"nesting_max":64,"binary_text":true},"cells_cut":0,"cells_bad_utf8":0,"cells_raw":0,"cells_binary":0,"cells_binary_text":0,"cells_vector":0,"n_row_groups":1,"reader":"pyarrow 23.0.1, python 3.13","created_by":"parquet-cpp-arrow version 24.0.0","schema":{"fields":[{"name":"code","type":"string","nullable":false,"metadata":[["description","Originally reported short code."]],"children":null},{"name":"label","type":"string","nullable":true,"metadata":[["description","Longer human-readable code using snake_case"]],"children":null},{"name":"description","type":"string","nullable":true,"metadata":[["description","Long human-readable description of the meaning of a code/label."]],"children":null}],"parquet":"required group field_id=-1 schema {\n  required binary field_id=-1 code (String);\n  optional binary field_id=-1 label (String);\n  optional binary field_id=-1 description (String);\n}\n"},"kv_metadata":[["pandas","{\"index_columns\": [], \"column_indexes\": [], \"columns\": [{\"name\": \"code\", \"field_name\": \"code\", \"pandas_type\": \"unicode\", \"numpy_type\": \"string\", \"metadata\": null}, {\"name\": \"label\", \"field_name\": \"label\", \"pandas_type\": \"unicode\", \"numpy_type\": \"string\", \"metadata\": null}, {\"name\": \"description\", \"field_name\": \"description\", \"pandas_type\": \"unicode\", \"numpy_type\": \"string\", \"metadata\": null}], \"attributes\": {}, \"creator\": {\"library\": \"pyarrow\", \"version\": \"24.0.0\"}, \"pandas_version\": \"2.3.3\"}"],["primary_key","code"],["ARROW:schema",{"$cut":{"chars":2016,"head":""}}],["description","Code table containing descriptions of categorical codes for compliance strategies used to control mercury in the EIA-860.\n\n\nMost-recent data:\n  2025\n\n\nProcessing:\n  Data has been cleaned and organized into well-modeled tables that serve as building blocks for downstream wide tables and analyses.\n\nSource:\n  EIA -- Mix of multiple EIA Forms\n\nPrimary key:\n  code"]]}
["BH","baghouse","Baghouse (fabric filter). After 2011, values use more specific columns BS, BP, BR."]
["BS","baghouse_shake_deflate","Baghouse (fabric filter), shake and deflate."]
["BP","baghouse_pulse","Baghouse (fabric filter), pulse."]
["BR","baghouse_reverse_air","Baghouse (fabric filter), reverse air."]
["CD","circulating_dry_scrubber","Circulating dry scrubber."]
["SD","spray_dryer","Spray dryer type / dry FGD / semi-dry FGD."]
["DS","dry_scrubber","Dry scrubber. Generic categorical column from pre-2013 data."]
["WS","wet_scrubber","Wet scrubber. Generic categorical column from pre-2013 data."]
["DSI","dry_sorbent_injector","Dry sorbent (powder) injection type."]
["ACI","activated_carbon_injection","Activated carbon injection system."]
["LIJ","lime_injection","Lime injection."]
["EP","electrostatic_precipitator","Electrostatic precipitator. After 2011, values use more specific columns EC, EH, EK, EW."]
["EC","ec_cold_side_w_fg_cond","Electrostatic precipitator, cold side, with flue gas conditioning."]
["EH","ec_hot_side_w_fg_cond","Electrostatic precipitator, hot side, with flue gas conditioning."]
["EK","ec_cold_side_wo_fg_cond","Electrostatic precipitator, cold side, without flue gas conditioning."]
["EW","ec_hot_side_wo_fg_cond","Electrostatic precipitator, hot side, without flue gas conditioning."]
["FGD","flue_gas_desulfurization","Flue gas desulfurization (pre-2013 only.)"]
["JB","jet_bubbling_reactor","Jet bubbling reactor (wet) scrubber."]
["MA","mechanically_aided_scrubber","Mechanically aided type (wet) scrubber."]
["PA","packed_type_scrubber","Packed type (wet) scrubber."]
["SP","spray_type_scrubber","Spray type (wet) scrubber."]
["TR","tray_type_scrubber","Tray type (wet) scrubber."]
["VE","venturi","Venturi type (wet) scrubber."]
["OT","other","Other: specify in schedule 7."]
["ND","not_determined","Not determined at this time."]