dioxin and hcb in ferric chloride

[Jamie Harvie <Jamie.Harvie@WLSSD.Duluth.MN.US>]

Our waste water plant intends to use ferric chloride for corrosion
protection. 10, 000 lbs per month.  Analysis showed level of hcb of 41
ppb., but we ran our of sample for dioxin/furan testing. I have a
literature source showing dioxin/f levels in ferric chloride at 0.162
TEQ (Heindl and Hutzinger) . Does anyone have any other data? The ferric
manufacturers purchase the majority of their ferric from steel mill that
produce the product after cleaning the steel with HCL. My guess is a
contaminated HCL stream purchased by the steel mills. Any data on
contaminated HCL ?? Sources of the HCL (pesticide manufacturing???) . 

Jamie Harvie
WLSSD
2626 Courtland Streeet,
Duluth, MN
55806

tel.  218-722-3336 x 307
fax. 218-727-7471