Not sure if both you and the garden centre have broken the law or just the garden centre for selling it to you. Not sure if possession is an offence under the Control of Pesticides Regs 1986, selling it to you certainly was.
UKWIR offer some thresholds for "Cresols and Chlorinated phenols"; a Group into which they place creosote, cresols and tricresyl phosphate; in soil for both PE and PVC pipes, other pipes are not affected.
On the subject of the new UKWIR guidance, has anyone had a soil sample tested for the extended VOC and sVOC suites yet? One lab that has got back to me say they will struggle to detect carboxylic acids amongst some other rather exotic compounds.
The mineral oil suite als ocontains some rarities; 2-methylisoborneol (MIB), camphor, dibutyl sebacate, galaxolide (HHCB), geosmin, oleic acid, oleum, palmitic acid and paraffin oil. I've heard of a few of these.
Just browsing through the guidance and my gut feeling is that for a brownfield site with VOCs you may just as well specify barrier pipe rather than go through some fairly onerous and expensive soil testing. Has anyone gone through this guidance on a real site yet?
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