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Diesel smell in Swildons (Blue Pencil)

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Apologies if this has been brought to people's attention before....

On the short round trip today (Sunday 6th Feb) and definately caught a whiff of some diesel or other fuel - this was near the bottom of the traverse over Blue Pencil going up to the start of the Troubles.

Didn't smell too strong, and it had gone once we'd got up to the top of the traverse,

Paul.

 

Les W

Active member
I'm not surprised. There has been a major spillage above this area last summer and it will take a lot of time to filter through. It is good that it is confined to such a small area though so perhaps we are now at the tail end of it.
 

seddon

New member
Sensitive creatures, gerbils -

The white 'growth' is still very much in evidence, sadly; but the breathability of teh air was much better t'other weekend than last autumn; when it was pretty dire for those whose airway doesn't like spores or what-have-you.
 

And

New member
I wonder how it is near Sump 4. When I did the Round trip in Mid November with a detour to Sump 4, there was a faint whiff in several points around the round trip, but it was pretty strong just before Sump 4.
 

Gerbil007

Member
Interesting. I've never caught a whiff of it in Swildons 4. Whenever I've noticed it, it's always seemed particularly strong around Shatter Pot to the first trouble, but otherwise fine. Perhaps we'll get pulses of whatever was spilled coming in for some time to come.
 

Maj

Active member
Hi,

Before Xmas, the time before last I did the short round, we started getting a whiff around the greasey chimney (I think). The odour was stronger in some places but then hardly detectable in others as we progressed round. A detour down Blue Pencil, sumps 4 & 3. Strong aroma at S4 but not so strong as we headed back up stream to S3. Any oil pollution will have difficulty in flowing on past S4, so it becomes a bit of a barrier (I wonder what it's like beyond S4?). When climbing back up the chain to Blue Pencil, a bit higher up and to the right is what at first looked like a calcite flow with a green tinge, on closer examination it was a sludge of some kind. Possibly an emmulsion of oil and water, or bacterial sludge living off the pollution perhaps (snotite?).

Maj
 

Ali M

Active member
And said:
I wonder how it is near Sump 4. When I did the Round trip in Mid November with a detour to Sump 4, there was a faint whiff in several points around the round trip, but it was pretty strong just before Sump 4.

Gerbil007 said:
Interesting. I've never caught a whiff of it in Swildons 4. Whenever I've noticed it, it's always seemed particularly strong around Shatter Pot to the first trouble, but otherwise fine. Perhaps we'll get pulses of whatever was spilled coming in for some time to come.



The main conduit  for the diesel appears to be the Watergate streamway, which is why the smell is often particularly bad in the Fault Chamber / Lower Fault Chamber area and near where the Watergate stream enters Swildon's Four, opposite Fault passage. Also, in the section of passage from Fault Chamber Junction and Blue Pencil there is at least one small connection that would allow airflow between Watergate and PR. Hopefully, if we have a wet spring most of the remaining diesel will be washed through, but it might be advisable to delay attempting the Watergate Connection until all the muck is washed out of the ducks and sump (Watergate Sump I) in this section of cave.
 

Naomi S

New member
Last weekend we picked up the whiff in Swildon's 4 and it got noticably stronger just beyond sump 4 if I remember correctly.
 

Ali M

Active member
The diesel will gradually be washed down cave - hope that it doesn't stay around the Sump V area for too long.
 

Hatstand

New member
Ali M said:
The diesel will gradually be washed down cave - hope that it doesn't stay around the Sump V area for too long.

oh I dunno - I quite like the smell of diesel, certainly by comparison to the "usual" smell around there!!!
 

mikem

Well-known member
Kilgore: Smell that? You smell that?
Lance: What?
Kilgore: Napalm, son. Nothing else in the world smells like that.
[kneels]
Kilgore: I love the smell of napalm in the morning. You know, one time we had a hill bombed, for 12 hours. When it was all over, I walked up. We didn't find one of 'em, not one stinkin' dink body. The smell, you know that gasoline smell, the whole hill. Smelled like
[sniffing, pondering]
Kilgore: victory. Someday this war's gonna end...
[suddenly walks off]
 

Les W

Active member
No fuel has yet been reported at Wookey Hole.
Hydrocarbons will eventually mix with water and by the time any residue gets there it will be seriously diluted (there is a lot more water coming out of Wookey Hole than enters via Swildon's) and will have transformed in to a gel (this is the gel that blocks filters and carburettor jets in engines if water gets in the fuel (a well known problem with poor quality fuel in aircraft and possible the reason for the jet that crashed "landed" just short of the runway at Heathrow a couple of years ago)).

The smell in the cave is the volatiles. Once they have escaped into the cave atmosphere the remaining fuel will no longer smell so it may pass unnoticed in the river Axe. It will be in such small quantities anyway that it will probably require analysis in a lab to even identify its presence.

The main part of the fuel is lighter than water so will tend to collect upstream in sumps where there is an effective barrier to prevent its migration down stream (a bit like a boom in an oil spill). There are lots of sumps in Swildon's so it will be very difficult for it to travel far downstream as a smelly fuel. The smell in the cave has a direct, non sump, route around the cave at least to Swildon's 4 and possibly via Shatter series and Swildon's 7 as far as Sump 9. After Swildon's 9 there is only the diving route so the smell is unlikely to travel any further. There may be other routes for the air but none have been reported so far.

There is also the possibility that some bacterial action may break down the fuel so that there is nothing left to travel on to Wookey Hole.

What should be apparent to us all is that managing groundwater and pollution within a karst aquifer is actually quite important.
 

exsumper

New member
"What should be apparent to us all is that managing groundwater and pollution within a karst aquifer is actually quite important"

Really Les?. Maybe you should inform the CSCC.

The attitude amongst some cavers "that its only a bad smell and will wash away eventually", displays an appalling level of ignorance about underground environments.  This Fuel Oil pollution will have been devastating to any cave life in the affected areas and downstream; the "volatiles" will  have had an extremely damaging effect on the health of any bats present. Judging from the reports in this post, the pollution will also be present for a considerable time to come; the high level relict passages don't get flushed through often!!!.

The CSCC need to have a serious debate over, whether or not they have fulfilled their obligation to protect the underground environment, or ignored it for selfish short term gain?














 

droid

Active member
And how, exactly are the CSCC supposed to prevent fuel spills (or even  road wash-off)?
 

Les W

Active member
exsumper said:
The CSCC need to have a serious debate over, whether or not they have fulfilled their obligation to protect the underground environment, or ignored it for selfish short term gain?

Alex, I don't know if you are trolling or if you want a serious debate, but I'll assume the latter for now.

How do you propose that CSCC can prevent pollution incidents from occurring? We are not the police, nor are we the Environment Agency. We have no statuary powers and certainly cannot visit every site that might handle polluting products (this is pretty much every house, farm, shop, etc.) that are sited in karst catchments, to audit their processes or protection measures.
We can only rely on the statuary protection that UK and EU legislation provides and the powers of the enforcement agencies to enforce it. In the case of a pollution incident it is the statuary bodies that are required to enforce the law. Currently the environment Agency is not visiting all premises in the area to check their facilities. I believe that there is, for example, a requirement now that bunded oil tanks are used. I am certain it is not possible to force existing domestic users of heating oil to upgrade their tanks, as all legislation is not normally written to apply retrospectively.
What can be done is place punitive fines to try and scare people into upgrading their facilities. These already exist.

I assume that you are implying, based on your previous opinions on here, that CSCC should involve the Environment Agency and pursue a prosecution of the offenders. This is not helpful for several reasons which should be obvious to most people but I will consider them here.
Prosecution after the even will not "undo the event. As a preventative measure this is pointless. If people want some form of retribution then prosecution is fine but it won't fix the cave.
A prosecution will not prevent this from happening again. Most people don't consider there is a risk until it happens to them. Even if somebody else is prosecuted, they don't believe it will happen to them. Speeding is a case to point here. Even with all the prosecutions and cameras, etc. people still speed.
In this particular case enforcing the bunded tank rules would not have any effect, as the tank was never compromised, it was the pipe that leaked into the ground. I believe, but am not certain, that this particular tank is bunded anyway.
Prosecuting somebody relies on proof. The only proof we have is circumstantial and an admission from the owners of the tank that the oil was theirs. Proving it beyond reasonable doubt, without their honesty, is a non starter (imagine that they changed their story to "oh no, I don't think it was me after all", how would you prove it? It would never get to court as the statuary bodies would not pursue it.
Prosecuting somebody will also have the effect of closing caves. If a land owner or house owner is threatened with prosecution, what do you think their reaction will be if they think cavers are involved?

I don't understand what you mean by "CSCC having an obligation the protect the underground". Other than doing our best to ensure people conserve the caves, CSCC is under no obligation to protect the underground. That is clearly the remit of statuary bodies such as Natural England and the Environment Agency.

What do you mean by "selfish short term gain"? CSCC has nothing to gain from any of this. The people that might gain something are the cavers themselves if CSCC manages to keep caves open.

Remember, CSCC is actually a co-ordinating body that represents the interests of the caving clubs, is composed of representatives of those clubs and carries out their bidding.
 

Peter Burgess

New member
Adding to Les's comments, if a cave ends up closed, how do you think future events will be spotted? Better to cooperate and take a positive, constructive and helpful position. That way, other people involved are more likely to take the same line. No matter what jokes might have done the rounds, the CSCC are not the karst police. That role belongs to the CCC Ltd.  :tease:
 
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