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Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

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List <strong>of</strong> Figures<br />

Number Page<br />

AX7-1.1.1 Relationship <strong>of</strong> bioaccessibility (low, medium, high) versus<br />

speciation as shown with scanning electron micrographs <strong>of</strong><br />

various Pb-bearing materials........................................................................ AX7-5<br />

AX7-1.1.2 Variation <strong>of</strong> bioavailability with particle size.............................................. AX7-7<br />

AX7-1.1.3 Illustration <strong>of</strong> particle lability and bioavailability at two different<br />

sites with similar total Pb concentrations and Pb <strong>for</strong>ms .............................. AX7-8<br />

AX7-1.1.4 Scanning electron micrograph <strong>of</strong> a large native Pb particle showing<br />

outer ring <strong>of</strong> highly bioavailable Pb-chloride and Pb-oxide........................ AX7-8<br />

AX7-1.1.5 Bulk lead versus single species modality................................................... AX7-12<br />

AX7-1.2.1 Long-term (1982-1989) annual trends in lead concentrations (µg/L)<br />

in Lewes, Delaware precipitation .............................................................. AX7-35<br />

AX7-1.3.1 Avian reproduction and growth toxicity data considered in<br />

development <strong>of</strong> the Eco-SSL ..................................................................... AX7-69<br />

AX7-1.3.2 Mammalian reproduction and growth toxicity data considered in<br />

development <strong>of</strong> the Eco-SSL ..................................................................... AX7-81<br />

AX7-2.2.1 Distribution <strong>of</strong> aqueous lead species as a function <strong>of</strong> pH based on<br />

a concentration <strong>of</strong> 1 µg Pb/L.................................................................... AX7-119<br />

AX7-2.2.2 <strong>Lead</strong> speciation versus chloride content .................................................. AX7-121<br />

AX7-2.2.3 Spatial distribution <strong>of</strong> natural and ambient surface water/sediment<br />

sites .......................................................................................................... AX7-128<br />

AX7-2.2.4 Spatial distribution <strong>of</strong> natural and ambient liver tissue sample sites....... AX7-129<br />

AX7-2.2.5 Spatial distribution <strong>of</strong> natural and ambient whole organism tissue<br />

sample sites .............................................................................................. AX7-130<br />

AX7-2.2.6 Frequency distribution <strong>of</strong> ambient and natural levels <strong>of</strong> surface<br />

water dissolved lead (µg/L). .................................................................... AX7-131<br />

AX7-2.2.7 Spatial distribution <strong>of</strong> dissolved lead in surface water (N = 3445). ........ AX7-132<br />

<strong>II</strong>-xii

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