Oil, or askarel? transformer oil, per se, isn't likely to be contaminated with
dioxins (the real problem). Oil has almost always been cheaper than the PCBs,
so if the utility had a choice, they'd probably fill with oil, being a
generally cost sensitive bunch. PCBs were used in places where the flammability
of oil is a problem (in buildings, in capacitors, etc.)
However, Bob is right.. if it's 30 years old, you really don't know. It could
have been filled from "that bucket over there in the corner that we drained out
of the transformer".
As a practical matter (flame war about to start), though, PCB contamination is
more of a logistical and legal problem than a health problem. The amount in a
dummy load isn't going to cause any real problems, especially if it's sealed
and not leaking. The problems that HAVE been reported with PCBs have been with
chronic exposure, or in connection with very high concentrations of dioxins
(i.e. manufacturing waste dumps), not with ppb amounts that are an omnipresent
contaminant in all sorts of things.
The real problem is that once it's found, it triggers a huge regulatory
infrastructure designed to make sure that it's in the "trivially small" amount
category, not the "oh yeah, we used to clean out the tanks in the back parking
lot with solvent" category. The regulatory and remediation process isn't all
that expensive for a small amount IF you think in terms of decent size
businesses (i.e. a few thousand dollars), and it might be covered by your
insurance in any case. It's cripplingly expensive if you think in terms of
scrounging insulating oil at hamfests.
It's enough of a problem that it is essentially impossible to buy surplus/scrap
electrical switchgear which is liquid insulated from the utilities in southern
California. They don't want the risk that it "might" be contaminated and that
you will "mishandle" it, triggering their liability (since it's "on the list"
it triggers cradle to grave responsibility.. everyone who touched it along it's
life path is liable for cleanup: designed to prevent waste generators from
hiring "abc disposal" and claiming that it's abc's problem). Even worse, they
worry that you might take their (known clean) stuff and intermingle it with
something contaminated in your scrapyard, then you get tagged with it, and
because they can't establish traceability, they go back and hassle everyone who
supplied anything to your yard.
----- Original Message -----
To: firstname.lastname@example.org ; email@example.com ; firstname.lastname@example.org
Sent: Sunday, June 06, 2004 12:24 PM
Subject: Re: [TowerTalk] Heath Cantenna
In a message dated 6/6/04 11:24:15 AM US Mountain Standard Time,
Why would it be deadly? They're filled with oil.
You're probably thinking about PCBs?
Let's not get too hasty and complacent here. In the early-mid 70s before the
PCB transformer notoriety, in Detroit for sure, many amateurs were having their
dummy loads filled with transformer oils. The guys in Salvage at Detroit Edison
back then made this a standard deal to their friends.Unknown to them they were
PCB oils since the PCB "problem" didnt raise its ugly head until later in the
I am sure their were many other utility people that offered the same
I.e. Mark....you have no idea what is in that Cantenna.
73, Bob K8IA
in the shadow of the Superstition Mtns
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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