Page 4 - nlf1954smog

SUMMAR!

The most important man""-.ma.de corrt..am.inants in the air in the Loa
Angeles area that contribute to Smog are gaseous organic compounds? coming
from the daily activities of the genernl public and irx:1ustryo These in
themselves are not sufficier.tt to cause Smog, unless starnant weather con=
ditions perrn:tt contamine.nts to concentrate e.bove the permissable levelo

Weather cond.itions in reneral a.t Newhall Ranch will be similar
to t.hose experienced in Los Angeleso The greater air ·turbulence caused
by greater temperature variations will tend toward a lesser build-up of
pol]utantsy; howevero

By proper pla1m:ngi air contamination from irrlustry and from
household incinr2ra:tors at Newhall Ranch will be kept at a mlnim.nno The
principle source of gaseous org&nic materials wi ll be automobile ex...11.austso

By the time that Newhall Ranch builds up to a ropulation of
75 000» the ,ac.1:).~eixtr·ation of automobile exha,usts will be only about 40%
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of that hi Los Angeles from the same source assuming that nothinp, is
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done to elim:inate or minimize organic materials in exhe.usto The lower
conoentration in Newhall results from the relatively grater volume of air
available in which t.o disp--·rse the contaminants<, 'Eventually development
of an effecti ve device for contr·olli ng automobile exhaust should essen=
tially remove any air pollution hazard at Newhallo

What little nuisance .th(;re might be from air contaminan.ts from
in:lustria.l j nstallations will be minimized because pre,miling winds will
drive fumes and smoke auay from the residential area.so

W:i.th proper planningi) air pollution at Newhall Ranch should
never present a serious problemo