First off, I want to thank everyone who contacted me on and off-list.

Sadly, the site and everything we have excavated, including the hides,
other artifacts, and hundreds of buckets waiting to be wet screened are
quarantined due to hazmat issues (asbestos). According to the testing, some
of the asbestos is naturally occurring in the soil, some is man-made. I'm
not allowed to even go near the hides, so we can't even start any type of
conservation. I can't even inspect them to make sure they aren't molding,
etc. The final disposition hasn't been determined, but the entire
assemblage, buckets and all, are likely slated for off-haul to an EPA
approved dump site out of state.

I know of several examples of hazmat arch site mitigation, but if anyone
knows of any projects that they have been successfully completed with this
issue, asbestos in particular, I would be grateful. I am extremely worried
about losing a monumental amount of data (of course, crew safety is first.)
There has to be a way to extract at least some data from all of our field
efforts.

THANK YOU again in advance for any help you can give me on this issue.

Linda


Linda Hylkema, RPA
Director, Cultural Resource Management, Santa Clara University
W: *408-554-4513* | C: *408-219-5748* | Ricard Observatory | 500 El Camino
Real, Santa Clara, CA 95053
[log in to unmask]





On Thu, Sep 20, 2018 at 5:47 AM Timothy Scarlett <[log in to unmask]> wrote:

> Linda,
> I concur with the points our colleagues made. But also strongly encourage
> you to act quickly on several fronts. As you dry your leather, it will mold
> and mildew quickly. These will grow into the leather and become harder to
> control.  You should consider adding spraying a biocide of some type- most
> of what I’ve read recommends dilute lysol disinfectant. Ideally, you would
> have soaked the leather in this solution when it was wettest and continued
> as part of drying.
>
> https://urldefense.proofpoint.com/v2/url?u=http-3A__nautarch.tamu.edu_CRL_conservationmanual_File7.htm&d=DwIFaQ&c=iVyFbx9TtkoGWXYs40w9MA&r=Nc_39fkRVvcJN1ByQ8sSkA&m=ZftK37h8EwhlR1wfYBvcDu0G41ZP5K7y4NcCGR1460c&s=ZkE2yfb97cs9-rPP_pFGOp41AvgBd1WlPUVrq_FrS4o&e=
>
> I don’t know what your plans are for the leather, which matters in making
> decisions, but you might also consider taking a sample and freezing it now.
> That sample could be used for chemical or dna testing later if you decide
> that it would be meaningful (or discarded after you have decided those
> types of tests are not needed).
>
> I have worked with a student to experiment with silicone oil treatments
> developed by Wayne Smith at Texas A&M. I consider these experiments
> successes, although it was very difficult to get certain chemicals for the
> process.
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__books.google.com_books-3Fid-3DiHIMzbxqyXsC&d=DwIFaQ&c=iVyFbx9TtkoGWXYs40w9MA&r=Nc_39fkRVvcJN1ByQ8sSkA&m=ZftK37h8EwhlR1wfYBvcDu0G41ZP5K7y4NcCGR1460c&s=d5A2S4p7uI_5eW4xadwUGK2ZcgvPUUdGo5LERRiCQrs&e=
>
> To make informed and ethical decisions, you really should get some help
> from a professional conservator.
> Best,
> Tim
>
> > On Sep 19, 2018, at 12:59 PM, Linda Hylkema <[log in to unmask]> wrote:
> >
> > Thank you Sandra! I'll check it out.
> >
> > Regards,
> > Linda
> >
> > Linda Hylkema, RPA
> > Director, Cultural Resource Management, Santa Clara University
> > W: *408-554-4513* | C: *408-219-5748* | Ricard Observatory | 500 El
> Camino
> > Real, Santa Clara, CA 95053
> > [log in to unmask] <mailto:[log in to unmask]>
> >
> >
> >
> >
> >
> > On Tue, Sep 18, 2018 at 6:46 PM Pentney, Sandra P <
> > [log in to unmask] <mailto:
> [log in to unmask]>> wrote:
> >
> >> Hi Linda,
> >> How the leather gets treated depends on what you want to be able to do
> >> with it down the road.
> >> Karen Lacy, former collections manager at the San Diego Museum of Man,
> has
> >> started a consulting business and could probably give you some tips.
> >>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.musecuratorial.com_ourteam-23-21&d=DwIFaQ&c=iVyFbx9TtkoGWXYs40w9MA&r=Nc_39fkRVvcJN1ByQ8sSkA&m=ZftK37h8EwhlR1wfYBvcDu0G41ZP5K7y4NcCGR1460c&s=4v2cPgi4P9gbPgJGQR-8bz6Ohbvfybmf5bDdQLZrM-8&e=
> >>
> >> Sandra P Pentney, M.A., RPA
> >> Environmental Team Lead
> >>
> >> ATKINS
> >> Explore our world of opportunities –
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> >> <
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.linkedin.com_company_atkins-257C&d=DwIFaQ&c=iVyFbx9TtkoGWXYs40w9MA&r=Nc_39fkRVvcJN1ByQ8sSkA&m=ZftK37h8EwhlR1wfYBvcDu0G41ZP5K7y4NcCGR1460c&s=l6bFPLJYPYDf3j6JjJQ3-XeltD8KWeqIAxMQl8lINf0&e=
> <
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.linkedin.com_company_atkins-257C&d=DwIFaQ&c=iVyFbx9TtkoGWXYs40w9MA&r=Nc_39fkRVvcJN1ByQ8sSkA&m=ZftK37h8EwhlR1wfYBvcDu0G41ZP5K7y4NcCGR1460c&s=l6bFPLJYPYDf3j6JjJQ3-XeltD8KWeqIAxMQl8lINf0&e=
> >>
> >>
> >> -----Original Message-----
> >> From: HISTORICAL ARCHAEOLOGY <[log in to unmask]> On Behalf
> Of
> >> Linda Hylkema
> >> Sent: Tuesday, September 18, 2018 4:27 PM
> >> To: [log in to unmask]
> >> Subject: archaeological leather
> >>
> >> Does anyone have any advice for working with buried leather that has NOT
> >> been submerged/waterlogged? Reports on other tanneries? We are working
> in
> >> an old leather tannery and have large hides that were found in a
> >> subterranean cement pit. The soils surrounding them are damp, but we
> don't
> >> want them to dry out too fast after removal. I believe them to be tanned
> >> with oak.
> >>
> >> For the moment, we have them loosely piled so that air gets in between,
> >> and they are wrapped in cotton sheets. We were misting the sheets with
> >> distilled water, but have stopped because they seem to be doing ok
> without
> >> it and are drying slowly. They are in an air conditioned room for now.
> >>
> >> Some are also heavily charred, owing to a fire in 1933.
> >>
> >> Thanks in advance for any help you might be able to provide. There is
> very
> >> little information out there for the preservation/conservation of
> >> archaeological leather that isn't waterlogged.
> >>
> >> Linda
> >>
> >>
> >> Linda Hylkema, RPA
> >> Director, Cultural Resource Management, Santa Clara University
> >> W: *408-554-4513* | C: *408-219-5748* | Ricard Observatory | 500 El
> Camino
> >> Real, Santa Clara, CA 95053 [log in to unmask]
> >>
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