{"query":{"parameter":"1 3 butadiene","place":"US-RI","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-RI","US"],"parameter_keys":["cas:106-99-0","cas:87-68-3","cas:36038-53-6","cas:69102-90-5","cas:68441-52-1","cas:1515-76-0","cas:67280-69-7","cas:126-99-8","cas:127883-08-3","cas:91053-01-9","cas:78-79-5"],"names_matched":[["1 3 butadiene","cas:106-99-0"],["1 3 butadiene 1 1 2 3 4 4 hexachloro","cas:87-68-3"],["1 3 butadiene 1 1 4 4 tetrachloro","cas:36038-53-6"],["1 3 butadiene homopolymer hydroxy terminated","cas:69102-90-5"],["1 3 butadiene homopolymer oligomeric","cas:68441-52-1"],["1 acetoxy 1 3 butadiene","cas:1515-76-0"],["2 bromo 1 1 3 4 4 pentachloro 1 3 butadiene","cas:67280-69-7"],["2 chloro 1 3 butadiene","cas:126-99-8"],["benzene diethenyl polymer with 2 methyl 1 3 butadiene hydrogenated","cas:127883-08-3"],["chloro 1 3 butadiene","cas:126-99-8"],["chloro 1 3 butadiene 2","cas:126-99-8"],["chloro 1 3 butadiene 2 chloroprene","cas:126-99-8"],["hexachloro 1 3 butadiene","cas:87-68-3"],["hydrocarbons c4 1 3 butadiene free polymd triisobutylene fraction","cas:91053-01-9"],["butadiene 2 methyl 1 3 isoprene","cas:78-79-5","butadiene 1 3"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":29,"names":["Hexachlorobutadiene","Chloro-1,3-butadiene, 2- (Chloroprene)","2-Chloro-1,3-butadiene"],"says":"29 rows share a parameter key with a longer name holding \"1 3 butadiene\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"1 3 butadiene\" 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":"1cf2a30b2e457274","parameter":"Butadiene, 1,3-","value":"0.076","value_num":0.076,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:106-99-0","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":"6792473dc3d2e1d2","parameter":"Butadiene, 1,3-","value":"0.33","value_num":0.33,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:106-99-0","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":"fb148d0b7ea04d4a","parameter":"Butadiene, 1,3-","value":"3.9e-05","value_num":0.000039,"unit":"mg/kg","direction":"max","kind":"guideline","medium":"soil","level":"national","parameter_key":"cas:106-99-0","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":"9e2a15b3462e343f","parameter":"Butadiene, 1,3-","value":"0.071","value_num":0.071,"unit":"µg/L","direction":"max","kind":"guideline","medium":"drinking_water","level":"national","parameter_key":"cas:106-99-0","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-RI"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"1 3 butadiene\", 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-RI"},"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"}]}