Date: Thu, 28 Oct 2010 13:14:36 -0600
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Alan Hall <ahalltoxic**At_Symbol_Here**MSN.COM>
Subject: Re: Lab safety showers
I agree with Rob Toreki,
This is a senseless regulation that would do much more harm than good,&nb
sp;and presents a slip-and-fall hazard full time, not just whe
n the emergency shower is in use.
I also agree with how dilute most chemical splashes would be by the time yo
u dilute them with 15 minutes **At_Symbol_Here** 20 gallons/minute = 300 gallons of
Alan H. Hall, M.D.
Date: Thu, 28 Oct 2010 14:55:20 -0400
Re: [DCHAS-L] Lab safety showers
Wow, thanks for sharing. That one is a poster child for Bad
1. Let's say the berm encompasses a 4' x 4' area around the shower. &n
bsp;That's 16 square feet, one inch high, for a volume of 1.33 cubic
feet = 10 gallons. Under ANSI Z358, showers must put out at lea
st 20 gallons per minute. And that shower is likely to flow for 5
, if not 15 minutes. So the berm is essentially useless.
Now, if the reg is calling for a berm that say, stretches across a
n entire hallway or doorway - heck, or just around the drain itself, th
at might work by flooding the rest of the building, as all it does is mak
e the floor drain non-functional. Plugging the floor drain permanen
tly is an easier solution.
2. The amount of hazardous material on a victim is going to be so exce
edingly small and so diluted in the drains that it boggles the mind.
;Seriously - you get what, 10 mL of concentrated acid on you and that w
ashes down the drain with 100 gallons of water? Yeesh. And
if the stuff was so nasty toxic that it is a hazard even that dilue, thi
s city review department thinks it's better to spread the hazmat all over t
he building and down a couple floors onto various objects and people than i
t is to send it down the drain.
3. When you're blinded by something and trying to find a shower on foo
t or on a wheelchair, even that 1" sloped bump is a barrier. And
no doubt a trip hazard the rest of time no matter how well it's marked with
Safety Emporium - Lab & Safety Supplies featuring brand names
Fax: (856) 553-6154, PO Box 1003, Blackwood, NJ 08012
On Oct 28, 2010, at 2:31 PM, Betsy Shelton wrote:
I am currently involved in construction of two new laboratories
and was instructed by the city commercial building review department to in
clude a 1" high curb around the shower area to keep hazmat from entering th
e floor drain in the event of a spill. Also, the curb has to be s
loped on both sides to allow accessibility.
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