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http://legacy.library.ucsf.edu/tid/yag55d00/pdf
aors alorly and raain wora e.nttant. 1 dsfLAto ti .e lad b.br.en
an sRt.rnal oonoontration oAango and tbe eorr .apsadias intorn.l ohango
in pellatant oonoantrstion has b.on ebaer.od.='t6'" Thia las
obvioasl, r.fl.cta the tiwe required for the pollutant to pon .trate
tAe stnuotar.. ThL ti.e Ld Is typioally ona to pa bonrs@
ldllstaat gas ventilation rat .., as wll aa d.n.ration ratos,
can b. anantitati.olT detatsia.d by winR a diffwaitial oqoatioa
deri.od in JUnt and Proeets Tentilation by Dsaaoas
,dC • Gdt - a:dt Cl)
ati.rs A Is room volv.., r, Is eonaeatration, fL Is rate of deneratioa
ef tbs pollat.nt p . . Q is . .ntilation rato, and j Is tiae.31 it
L asaum.d that tb. rates of ..ntiLtion aad denaration are constant
during the period sazplsd . It Is also assumod that as soon as tM
pollutant Is rel.as.d . it b.eo..s instantly aad boaagonsonsly aix.d
tdrooiLont tbo rooa'a .olum. . ltsaalts obtain.d fro. thU aqnation
are tnor.foro good ayproxlsationa .
J,6Liations xith Tin.
Dai17 carbon aonozide variations eorrespond to .ornint aid e.onint
y .alic aaLa .obilo traffic with appeopriate tiae lags for p .n.tration of
th. W lato the structure. This trenA Na not observed on tadC.ada
.bsa pewumnbl,T rns bonr traffic uwal+d be eoa.idarably redaa.d .
O.oaa .as f+sunA to be lor..t at aidbt ritb 1o .als dradu.lljr ineroaaint
to a p.t at about alo .en !a tA. .orains.32 Sord.ae, et a1.* fomd that
ladoor 1..aL of eatboa aoaaddo wro aldLs ia tba lall of the Y .ar
than Is tse sa.er.33 8e did not offer aaw ssplanatioa for tba obaer.tl
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