{"query":{"parameter":"1 4 dichloro 2 butene","place":"US-NV","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-NV","US"],"parameter_keys":["cas:764-41-0","cas:1476-11-5","cas:110-57-6"],"names_matched":[["1 4 dichloro 2 butene","cas:764-41-0"],["cis 1 4 dichloro 2 butene","cas:1476-11-5"],["trans 1 4 dichloro 2 butene","cas:110-57-6"],["dichloro 2 butene 1 4 trans","cas:110-57-6","dichloro 2 butene 1 4"],["dichloro 2 butene cis 1 4","cas:1476-11-5","dichloro 2 butene 1 4"],["dichloro 2 butene trans 1 4","cas:110-57-6","dichloro 2 butene 1 4"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":8,"names":["Dichloro-2-butene, cis-1,4-","Dichloro-2-butene, trans-1,4-"],"says":"8 rows share a parameter key with a longer name holding \"1 4 dichloro 2 butene\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"1 4 dichloro 2 butene\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":4,"offset":0,"returned":4,"next_offset":null,"rows":[{"id":"4dbb50280f1db8e5","parameter":"Dichloro-2-butene, 1,4-","value":"0.0021","value_num":0.0021,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:764-41-0","place":["US"],"conditions":["Resident Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"not verified"},"section":null,"page":null,"quote":null,"table":"sols","column":"residentiel"}},{"id":"bfc65f8a069e9272","parameter":"Dichloro-2-butene, 1,4-","value":"0.0094","value_num":0.0094,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:764-41-0","place":["US"],"conditions":["Industrial Soil (mg/kg)"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"not verified"},"section":null,"page":null,"quote":null,"table":"sols","column":"industriel"}},{"id":"d34729a1f367633f","parameter":"Dichloro-2-butene, 1,4-","value":"6.6e-07","value_num":6.6e-7,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:764-41-0","place":["US"],"conditions":["Protection of Groundwater SSLs: Risk-based SSL (mg/kg); SSL values are based on DAF=1"],"cite":{"instrument":"us_rsl_soil","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Soil","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"not verified"},"section":null,"page":null,"quote":null,"table":"ssl","column":"risque"}},{"id":"4029a51e9e8c4098","parameter":"Dichloro-2-butene, 1,4-","value":"0.0013","value_num":0.0013,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:764-41-0","place":["US"],"conditions":["Tap Water (ug/L): Regional Screening Level (RSL) Summary Table (TR=1E-06, HQ=1) November 2024"],"cite":{"instrument":"us_rsl_tapwater","title":"US EPA — Regional Screening Levels (RSLs), Summary Table (TR=1E-06, THQ=1.0), November 2024 — Tap Water","issuer":"U.S. Environmental Protection Agency (EPA)","edition":"November 2024","source_url":"https://semspub.epa.gov/src/document/HQ/405270","source_sha256":"0160dc81b4f55d738a354a74de92488f149946ebfa7c6a6c64592f45348043d7","fetched_at":"2026-09-19","source_status":{"checked":"2026-10-15","status":"not verified"},"section":null,"page":null,"quote":null,"table":"eau","column":"eau_robinet"}}],"next":[{"tool":"check_values","says":"Has your user measured this? check_values sets each of their results beside every row held here, with a verdict and the row's cite.","arguments":{"place":"US-NV"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"1 4 dichloro 2 butene\", value, unit}, ...], any other parameters too."},"post":"/api/v1/check"},{"tool":"read_certificate","says":"Has your user a laboratory certificate? read_certificate reads every row it prints, each with its page, and checks them against these limits.","arguments":{"place":"US-NV"},"needs":{"content_base64":"The laboratory's certificate (PDF) or its XLSX, XLS or CSV export, as base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}