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Posted By Peter MacDonald
Hi
I've been asked by a client to ensure that the scrap arrising from our demolition work of an oil tank will not end up in the "foodchain". i.e as cans/food storage.
I'm assuming that this can't really be done as you cannot track "scrap" as it goes through the process of recycling from source to furnace.
My question is that leaving aside the furnace process destroying any residual contamination I'm assumming that the people who produce metal food storage will have their own controls on the spcification and quality of the raw materials.
Can anyone enlighten me on these controls?
Note that the tank and scrap is cleaned before leaving site so we're talking impregnation type levels of contamination. We also let the metal merchant know of any residual contamination.
Pete
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Posted By Smiff
Your client sound a bit clueless!
The average food can may contain molecules of a Datsun, a steam locomotive, an Iron Maiden or a Claymore from various times of the three thousand years of ironmaking.
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Posted By Peter MacDonald
Thanks for your insight Smiff but I'm aware of that!
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Posted By GFB
Metal used in packaging has to comply with the Packaging (Essential Requirements) Regulations which set limits for the heavy metal content of metals used in all packaging. There are also other stringent requirements on the coatings used on the inside of food cans and other metal packaging to prevent corrosion to ensure they don't migrate into the food.
So yes, the oil tank could end up recycled back into a food or beverage can (maybe you have seen the Recycle Now adverts on TV?) but any oily contaminants would no doubt not have survived the blast furnace and the steel it ends up in will have been specified specifically for food use.
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Posted By Smiff
Lighten up, it's Friday.
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Posted By Merv Newman
Smiff, lighten up yourself. You're dead right and so is GFB. As said, clueless client.
As someone once told me, in the middle of an argument/discussion which I have now totally forgotten, I am either a descendant of, or contain atoms from the body of, Arthur the great or have at the very least drunk water that he passed after a heavy drinking session.
I couldn't argue with that.
And yes, GFB, an iron furnace at 1200°C is going to do away with any organic residue.
Merv
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