1~'':': . . http://legacy.library.ucsf.edu/tid/yag55d00/pdf

http://legacy.library.ucsf.edu/tid/yag55d00/pdf
asW ealaulation bsaad on diffusion quation., auob•sa . 11o1c'a Lvs,
woald mt be valid . Tba sin fiov proeesa is ad.eetion.
Daooaoosition of Osons
La diseusaad sarli .r, tbere sra ao .ignifioant indoor aouroea of
esons. Indoor 1os1s sre oussad by esoaa'a O .aatr.tion iato the build-
in ffom the outside. Dooe.p.aition of osos» tollew aiaple first
erder kiuetica . !bs aolution of the first erdor rsto equation for the
daoo.position rate constant 1a di .en balan
k • (1/t) 1% (C„/C) (8)
4ta points wera eboaan during parioda vb .n outdoor eonesntrations fell
to sero and durift p.riods vban indoor ooncantr .tiona wra fallint .
!bs .alua of the d.eowposition rsta constant was doteswin .d in 12
raoas with a total of 52 daterainations . For a aet of oaloulation.,
the .alue of the rata constant was constant vitbin .xpariaen,tal arror.
Tbasa .alu.s alons with tb.ir standard d ..istion are prasont.d ln
labla L
!bs rato constant in nised air was ypi .oalll 0.4e ainato : 1
and the rata constant in nnni :ad a1r was typically 0.02e aiautaa 1.
lb..a eonstants oorraspond to lrlf li .as of 1 .5 sinut.a and 7.9 ain-
•tef, r+ .sp.oti.elf. It ia asauaad that the .antilatioA r.te of otona
3s e.santially the sawa as that of 00 in a gi.an rasidanos . !be
ventilation rata bslf-lifa ia from ten tiwN to eno butdred timM
lardar than tbe d.oo.position rat . balf-lif.. Consquently ventilation
ia aot a aiRnifioant ..ob.nia for the remo.al of esona flww the
bD.a.
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