Document YjO6MQ5wXeRapqVe0BQENV95N

isveral dioxin/dibenaofuran date submissions for 3,4*0 and related pesticides vara revlevad. Sach manufacturer of the registered technical pesticide vaa requested to randomly aloot seven samples of ths pesticide and to analyst by a ge/aa method capable of quantitation to apaoifiad concentration levels, or limits of quantitation (loq), for aach dioxin and dibansofuran of toxioologioal interest. The resulting submissions vara reviewed for compliance with tha 'analytical chemistry raquiraaanta of tha data call-in and for scientific validity. Table i summarises tha findings for 1/4*0. Only 2,3,7,tetraehlorodibenso-p-dioxin and 1,2,3,7,l-pshtaohlorodlbanzo-pdioxin vara found at or abova tha SPA log's. Tyo of tight technical 3,4-D's contained 3,3,7,8-TCDD slightly abova tha 0,1 ppb loq, Three of tight tachnioal 3,4-D's contained 1,3,$,7,-PCDD at concentrations greataar than tha o.s ppb loq. Kona of tha remaining thirteen chlorinated dlbenzo-p-dioxins and dibantofurans vara found at or above tha BPA log1 in tha tachnioal a,4-D. Data on tha 3,4-DB and 2,4-DP acids and derivatives of all three acids are too limited at this time to be useful to tha 2,4*0 panel.