Hi Matt.

22-Mar-04 01:31:00, Matt Mc_Carthy wrote to JIM HOLSONBACK

 JH>> 1.  If household bleach ends up being just table salt and oxygen,
 JH>> why do we have the distinctive odor of Chlorine when we do a
 JH>> "sniff" test?

 MM> It doesn't "end up" until all the 'activity' is finished.  Do your
 MM> white sheets smell like Cl when you sleep on them?

if you can smell it it's in the air, so chlorine is coming out of the
bleach.  it could be a residue form the manufacturing process I guess.

 JH>> BTW, my painter-helper fellow used a "double strength" type of
 JH>> bleach solution - - about twice the strength of household bleach
 JH>> - as he gets from the swimming pool companies and they pitch this
 JH>> solution to the owners of RV's and etc. for purifying their water
 JH>> systems.  He sprayed it full-strength, low pressure, onto the
 JH>> bottom of the patio deck, and it is 1x6 T&G decking, with some
 JH>> cracks between the planks. We washed it all down later with 2500
 JH>> psi pressure washer, but that could have driven any residue of
 JH>> the NaOH up into those cracks.  That is my theory for what I have
 JH>> seen - -- and the visible moisture condensation is occurring on
 JH>> the bottoms of only a small percent of those 3x6 or so patio deck
 JH>> rafters which support the 1x6 T&G wood deck.

 MM> Most likely, the 'wetness' of the boards causes them to cool
 MM> quicker than the ground surface, and the moisture from the warmer
 MM> ground below the deck is merely condensing on the nearest cooler
 MM> surface beneath the deck

if the ground below the deck is moist that could happen, but most times
I've been under buildings it's been very dry there.

 -=> Bye <=-

---