{"permit":"VA0006203","name":"Chesapeake Bay Bridge & Tunnel District","state":"VA","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/VA0006203"},"about":[{"label":"What it is","text":"Inspection & Fixed Facilities (EPA's industry listing)"},{"label":"Where","text":"Cape Charles, Virginia","href":"https://www.openstreetmap.org/?mlat=36.965277&mlon=-76.113333#map=14/36.965277/-76.113333"},{"label":"Last 12 months","text":"Over a limit once, last in December 2025 (Copper, total recoverable)"},{"label":"Permit","text":"In force until May 31, 2031"}],"renewal_due":null,"renewal_check":null,"sector":{"state":"VA","sic":"47","permits":8,"list":"https://passage-data.com/api/v1/permits?state=VA&sic=47","page":"https://passage-data.com/dmr/s/VA/47"},"limits_from_version":null,"record":{"last_filed":"2026-03-31","over":1,"over_by":[["Copper, total recoverable",1]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Copper, total recoverable","times":1,"find_limits":{"parameter":"copper","place":"US-VA","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-VA&medium=surface_water"}],"limits":[{"outfall":"002","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":">=","value":"6","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"002","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"002","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"30","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"002","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"maximum","qualifier":"<=","value":"60","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"002","parameter":"Zinc, total recoverable","parameter_code":"01094","statistic":"maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"002","parameter":"Copper, total recoverable","parameter_code":"01119","statistic":"maximum","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":null},{"outfall":"002","parameter":"Petrol hydrocarbons, total recoverable","parameter_code":"45501","statistic":"monthly average","qualifier":"<=","value":"10","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":null},{"outfall":"002","parameter":"Petrol hydrocarbons, total 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address; `get` is the address to fetch.","arguments":{"state":"VA","sic":"47"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=VA&sic=47","url":"https://passage-data.com/api/v1/permits?state=VA&sic=47","page":"https://passage-data.com/dmr/s/VA/47"},{"tool":"find_limits","says":"What do the rules say about what it went over on? find_limits gives the cited state and federal limits for it, each with its rule; `get` is the address to fetch, and `over_limits` holds one for each parameter.","arguments":{"parameter":"copper","place":"US-VA","medium":"surface_water"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-VA&medium=surface_water","url":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-VA&medium=surface_water","page":"https://passage-data.com/limits/US-VA/copper"},{"tool":"check_dmr","says":"Before your user files this permit's DMR: check_dmr sets each value beside the permit's limit for that period, with EPA's violation rule's verdict.","arguments":{"permit":"VA0006203"},"needs":{"period_end":"The reporting period: its month (2026-09).","values":"The period's values as your user will file them: [{outfall, parameter, statistic, value, unit}, ...]."},"post":"/api/v1/dmr/check","url":"https://passage-data.com/api/v1/dmr/check","page":"https://passage-data.com/dmr/?permit=VA0006203"},{"tool":"fill_dmr","says":"Has your user the plant's raw daily results? fill_dmr computes the period's DMR values from them, each with the rows it came from.","arguments":{"permit":"VA0006203"},"needs":{"period_end":"The reporting period: its month (2026-09).","rows":"The plant's results: [{date, parameter, value, unit, point}, ...]; or `table`, the lab's or plant's export as text."},"post":"/api/v1/dmr/fill","url":"https://passage-data.com/api/v1/dmr/fill","page":"https://passage-data.com/dmr/?permit=VA0006203"}]}