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Sp

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Assis

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SA

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5

Overv

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Midwestern States Risk AsssessmentSymposium

Robert Stewart

University of Tennessee, Knoxville

November 4th, 2009

©Copyright 2009. University of Tennessee. All Rights Reserved.

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Ge

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Info

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Windows--based freeware designed to integrate scientific models

with decision and cost analysis frameworks in a seamless, easy to

use environment.

SADA has been supported by DOE, EPA, and the NRC. SADA

Version 4.0/4.1 has had 15000+. Version 5.0 has been out since

January, 2009. Support is provided through Yahoo groups,

training courses, and a 600 page user guide.

•Visualization/GIS

•Statistical Analysis

•Geospatial Interpolation

•Geospatial Uncertainty Analysis

•Human Health Risk Assessment

•Ecological Risk Assessment

•Custom Analysis

•MARSSIM Module

•Area of Concern Frameworks

•Cost Benefit Analysis

•Sampling Designs

•Export to Arcview/Earthvision


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Wh

ere

an

d w

ho

….

http://www.tiem.utk.edu/~sada/documentation.shtm

l


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Da

ta E

xp

lora

tio

nData Plot/GIS Overlays

Statistics

Polygon Selection/Cutaways

Spatial Data Screens


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Sta

tis

tic

s

•Numerous univariate

statistics

•Non-parametric

hypothesis testing

•Power curve based

sample sizes

•Histogram and cdf


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Sp

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An

aly

sis

Spatial Estimation

Spatial Uncertainty


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•SADA implements EPA methods for conducting ecological and

human health risk assessments

•Calculation of site-specific prelim

inary remediation goals

•Benchmark database for contaminant effects on ecological receptors

•Exposure modeling for humans and over 20 other terrestrial species

•Contains IRIS/HEAST toxicity databases for calculating risk from

exposure

•Contains EPA default exposure parameters for the risk models

•Tabular screening and risk results

•Point screens

•Risk and dose mapping


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•For each media

–Soil, Sediment, Surface W

ater, Groundwater

•Exposure Scenarios

–Residential,

Industrial,

Recreational,

Agricultural, Excavation

•Exposure Pathways

–Ingestion, Inhalation, Derm

al Contact, Food

Chain (Beef, Milk, and Vegetable Ingestion)

•IRIS and HEAST Toxicity Databases for Carcinogenic

and NoncarcinogenicEffects

•Physical Parameters for Modeling

–Bioaccumulation Factors

–Volatilization, Particulate Emission Factors

–Perm

eability Constants, Absorption Factors

–Saturation Coefficients,

Radionuclide Half-

Lives


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Hu

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ea

lth

Ris

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•PRG Calculation

•PRG Screens

•Human Health Risk


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•SADA calculates risk for each sampling

point or

spatial estimate based on

contaminant and exposure scenario

•Legend scale changes to risk


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Ec

olo

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Ris

k B

en

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ma

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cre

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Ecological Risk Benchmarks

•Suitable for screening ERAs

•Compilation of ecological benchmarks

for surface water,

soil, and sediment

•Benchmarks

a

function

of

environmental

variables

where

appropriate


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Ec

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Do

se

Ex

po

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•SADA

calculates dose

(mg/kg BW d) from food

ingestion, soil

ingestion,

derm

al

contact,

and

inhalation for

terrestrial

exposures

•SSL, Female, Male, or

Juvenile

•Over 20 different species


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•View or Edit Criteria

•Data Screens


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An

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•Spatial Screens

•Sampling Strategies

Cost Vs Risk Reduction

•Spatial Risk

•Area of Concern

•Cost Benefit


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3D

Vis

ua

liza

tio

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True 3d Views: Points,

Blocks, and Isosurfaces


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Init

ial S

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Desig

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•Judgmental

•Simple Random

•Simple Grid

•Simple Unaligned Grid

•Standard Grid

•Standard Unaligned Grid

•MARSSIM Design

•2d and 3d Hot Spot search designs

Seco

nd

ary

Sa

mp

le D

esig

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•Threshold Radial

•Adaptive Fill

•High Value

–(soft, simulated & unsimulated)

•High Variance


•Extreme Value


•Area of Concern Boundary Design


•Minimize/Maximize Area of Concern

•LISA Designs

–(Ripley’s K,Moran’s I,Geary’s C)

SADA has a number of sample design strategies in Version 4.0. These

strategies include initial and secondary designs. Some are basedon

data alone while others are based on modeling results. With the

exception of a couple of exclusively 2d designs all are available in 3d

dimensions.


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So

me

Ex

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ple

In

itia

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Judgmental

Random

Grids

Unaligned

Grids

3d hotspot

search


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So

me

Ex

am

ple

Se

co

nd

ary

De

sig

ns

AOC Boundary Design

Threshold Radial

High Value Design

Adaptive Fill


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Ov

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iew

: A

uto

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•Provides transparency in the modeling process and facilitates

reproducibility of results.

•SADA automatically analyzes any current result and determ

ines what

the “ingredients”of that result are. These ingredients are presented to

the user, who can choose the level of documentation to create.

•Self-documentation of all

parameters, models, and other relevant

inform

ation.

–Exposure concentrations

–Risk models

–Exposure variables

–Geospatial parameters

–Toxicity data

–Images as bitmaps

•HTML form

at, can be exported to popular word processors


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Ov

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: A

uto

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nta

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•Area of concern map

•Based on HH Risk

•Utilized inverse distance

as geospatial model

•Block based area of

concern framework.


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SA

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Ov

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iew

: A

uto

do

cu

me

nta

tio

n

Step

Analysis of Model

Elements

DocumenationOutput


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Re

so

urc

es

/Su

pp

ort

•Help file

•500+ page user guide

•User group

•Web page

•Classes

•EPA Clue-in classes

www.tiem.utk.edu/~sada/index.shtml


23

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ES

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