Distribution of Chlorinated Hydrocarbon Pesticides and PCBs in the ...
Distribution of Chlorinated Hydrocarbon Pesticides and PCBs in the ...
Distribution of Chlorinated Hydrocarbon Pesticides and PCBs in the ...
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4.1.2 Air Particulates<br />
Quantifiable concentrations <strong>of</strong> a few residues were found <strong>in</strong><br />
air particulate samples obta<strong>in</strong>ed with <strong>the</strong> particulate high volume<br />
air sampler <strong>in</strong> May, none <strong>in</strong> August <strong>and</strong> 12 <strong>in</strong> June (detection<br />
limits were lower for June samples because <strong>of</strong> use <strong>of</strong> a 60 m GC<br />
column with result<strong>in</strong>g better resolution; see section 3.18). <strong>PCBs</strong> Q<br />
were <strong>the</strong> most abundant compounds <strong>in</strong> May <strong>and</strong> June particulates at<br />
1.5 pg/m3. All o<strong>the</strong>r detectable compounds <strong>in</strong> June samples were<br />
less than 1 pg/m3. Levels <strong>in</strong> May samples were slightly higher but<br />
were below quantitation <strong>and</strong> are not as reliable. A summary <strong>of</strong><br />
detectable compounds <strong>in</strong> June 1987 samples is given below:<br />
4.2 Snow<br />
Compound<br />
PCB as Arochlor 1254<br />
HCB<br />
olpl DDE<br />
p'p' DDE<br />
P'P' IJYT<br />
alpha HCH<br />
gamma HCH<br />
trans chlordane<br />
cis chlordane<br />
heptachlor epoxide<br />
alpha dos'Jw=n<br />
dieldr<strong>in</strong><br />
Concentration<br />
Concentrations <strong>of</strong> dissolved <strong>and</strong> particulate<br />
organochlor<strong>in</strong>es <strong>in</strong> melted snow are summarized for all three
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