From: Slawomir Janicki <slawomir.janicki**At_Symbol_Here**COMCAST.NET>
Subject: Re: [DCHAS-L] Need a consulting organic chemist on safety issue
Date: December 1, 2012 7:25:05 PM EST
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <CAEwQnqijrTDzikgF=MLfBsyNQqG-FGBFtWuqc0PCTckA=2HuGg**At_Symbol_Here**>

If the storage tank can be sealed (or vented through a sterilizing filter) then the fluid could be circulated through a 0.2 =B5m cartridge filter between the shows. This should remove bacteria and anything larger. If viruses are the concern there are cartridge filters finer than 0.2 =B5m.


There will be some cost of procuring and setting up the system, non-trivial amount of energy to run the pump around the clock, more energy to potentially cool the liquid (the pump will heat it up), and the management of spills. I would need to check compatibility of all components with plastics like PVC and/or PP, but I think a recycled DI water system could be adapted for this experiment. The DI water systems have tanks, filtration units, pumps, and controls to run them. The cartridge would have to be replaced with the 0.2 =B5m or finer, but this should not be a huge issue.


The pre-requisite for this to work is that all components of “blood” are in solution. I would watch the amount of water added to the original “blood”.


The wading tank could be manually cleaned and disinfected between the shows. Disinfection in the absence of the “blood” should not raise any tox issues even with bleach.


Slawomir Janicki


From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Jeffrey Lewin
Sent: Saturday, December 01, 2012 5:57 PM
Subject: Re: [DCHAS-L] Need a consulting organic chemist on safety issue


Rather than heat, I'd look at cooling between shows.


But in the end I think disinfection is an unlikely solution.


I'd focus on:


Can the set and effect be done with less than 1500 gallons of blood.  And, I hope the set designers have looked at the floor loads....that's 12,000 lbs+ of liquids and doesn't include the set itself or the actors.  Can the tank _look_ full?  If the audience watches blood flow from other parts of the set can it be recirculated? etc.


Can the amount of blood that is actually contaminated be reduced?  Designing the sets and working on blocking so that the blood the actors walk through isn't circulated with the rest of the blood.


And finally, can costumes put in some sort of waterproof barrier in the footwear and pants to reduce the contact with the skin?


Can you give us an overview of the set and scene?


Jeff Lewin

Biological Sciences

Michigan Tech University

(and 20+ years in technical community theatre)





On Sat, Dec 1, 2012 at 9:09 AM, <ACTSNYC**At_Symbol_Here**> wrote:

That information is coming.  And that's an area I know pretty well and one of my concerns. 

In a message dated 11/30/2012 8:50:41 PM Eastern Standard Time, sigmannsb**At_Symbol_Here**APPSTATE.EDU writes:

Which FD&C dye are they using?  Sorry if I missed that in the emails.



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