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  • 1.  Effect of chemicals on wood/metal artifacts on loan

    Posted 05-01-2024 13:28

    After finding some signs of rodent activity in one of our historic barns, our environmental compliance team called in a pest contractor to sanitize the building. I'm concerned about the chemicals they are proposing, and would love to get input on whether these are something I should raise more concerns about, especially since we have a number of wood and metal farming implements in the barn that are on loan from another institution. The chemicals include chlorine and ammonia compounds, which I know we don't use for cleaning around artifacts because of the potential effects of fumes on the objects. (They are not proposing to apply anything directly to the objects.) Would anyone be able to tell me if I should start making more of a fuss about this? Here are the ingredient lists:

    DSV disinfectant:

    ACTIVE INGREDIENTS:
    Octyl Decyl Dimethyl Ammonium Chloride .... 1.650%
    Didecyl Dimethyl Ammonium Chloride .......... 0.825%
    Dioctyl Dimethyl Ammonium Chloride ........... 0.825%
    Alkyl (C14, 50%; C12, 40%; C16, 10%)
    dimethyl benzyl ammonium chloride........... 2.200%
    INERT INGREDIENTS ...................................... 94.500%
    TOTAL .............................................................. 100.000%
    EPA Reg. No. 10324-80-64405 EPA Est. 64405-TN-1

    Sniper disinfectant:

    ACTIVE INGREDIENTS:
    Chlorine dioxide ……………………………………………………………………….........0.200%
    Dimethyl Benzyl Ammonium Chloride N-Alkyl (60% C14, 30% C16, 5% C12, 5% C18)……0.085%
    Ethylbenzyl Ammonium Chloride N-Alkyl (68% C12, 32% C14) Dimethyl.……….………..0.085%
    Other Ingredients…….…………………………………..………………………………....99.630%
    Total…….…………………………………………………….…………………………..100.000%



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    Carolyn Schimandle
    Parks Program Coordinator
    Los Gatos CA
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  • 2.  RE: Effect of chemicals on wood/metal artifacts on loan

    Posted 05-02-2024 11:18

    Hi Carolyn, 

    Introducing chlorides to an environment that has historic wood and metal objects is a concern, especially if those objects are on loan. However, the percentage of active ingredients in each pesticide mentioned is low. If possible, moving or covering the historic implements with plastic sheeting during treatment is a good protective measure - just to ensure that there is no direct contact with the pesticide. After treatment, I think it would be a good idea to make sure the barn is well ventilated. 



    ------------------------------
    Brittany Murray
    Graduate Fellow (Class of 2025)
    Winterthur/University of Delaware Program in Art Conservation
    Winterthur DE
    ------------------------------



  • 3.  RE: Effect of chemicals on wood/metal artifacts on loan

    Posted 05-02-2024 15:38

    Thank you. That is very helpful. The smaller implements could be moved, and we could cover the old hay wagon. (It looks fragile, and moving it seems too risky.) I'll check with the collections manager from the loaning institution and see if they approve us using these products around the hay wagon, sharing the information that you provided.

     

    Carolyn Schimandle

    Interpretation Coordinator, Region 2

    Santa Clara County Parks

     

    408-834-2397

    Parkhere.org

     






  • 4.  RE: Effect of chemicals on wood/metal artifacts on loan

    Posted 05-02-2024 19:38
    I am assuming you are interested in "sanitizing" because of the risk of rodent-borne disease, not as a pest control solution.   Unfortunately, unless you take steps to prevent rodents from getting access to your historic structure, you will end up with the same problem again (and again).  I would suggest you get in touch with the folks at the Association for Living History, Farm and Agricultural Museums to get advice on a permanent solution: https://alhfam.org

    --
    Janice Klein
    Executive Director
    Museum Association of Arizona





  • 5.  RE: Effect of chemicals on wood/metal artifacts on loan

    Posted 05-03-2024 09:54

    I agree with you 100%, Janice. I'm actually not interested in sanitizing. My objections have been overruled. So I am doing what I can and at least trying to protect the historical objects on loan. It's interesting sometimes working in an organization that is 99.9% not history-focused. We do what we can!

     

    Carolyn Schimandle

    Interpretation Coordinator, Region 2

    Santa Clara County Parks

     

    408-834-2397

    Parkhere.org