{"query":{"parameter":"1 3 butadiene","place":"US-LA","medium":null,"statistic":null,"kind":null},"searched":{"places":["US-LA","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"],"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 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"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":19,"names":["Hexachlorobutadiene","Chloroprene"],"says":"19 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): not sent. Ask for one by its name or CAS number."}},"total":12,"offset":0,"returned":12,"next_offset":null,"rows":[{"id":"9215e495ff18cb01","parameter":"1,3-butadiene","value":"25.0","value_num":25,"unit":"lb/yr","direction":"max","kind":"threshold","medium":"air_emission","level":"regional","parameter_key":"cas:106-99-0","place":["US-LA"],"conditions":["the source is a major source of toxic air pollutants (5103)"],"cite":{"instrument":"us_la_lac33_iii_5112","title":"LAC 33:III.5112 — Toxic air pollutants: minimum emission rates (Table 51.1) and ambient air standards (Table 51.2)","issuer":null,"edition":"LII transcription of LAC 33:III.5112 (fetched 2026-09-25)","source_url":"https://www.law.cornell.edu/regulations/louisiana/La-Admin-Code-tit-33-SS-III-5112","source_sha256":"ad168892d6da7f3e8eda05d066b3cf2a0018d9fefcd81676abc7ca5110cca6dc","fetched_at":"2026-09-25","section":"Table 51.1 Class II","page":null,"quote":"1,3-butadiene 106-99-0 Biethylene 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