PRELIMINARY STUDY AND ANALYSIS

OF

TOXIC AIR POLLUTANT EMISSIONS

FROM O’HARE INTERNATIONAL AIRPORT

AND THE RESULTING HEALTH RISKS

CREATED BY THESE TOXIC EMISSIONS

IN SURROUNDING RESIDENTIAL COMMUNITIES

AUGUST 2000

PRELIMINARY RISK EVALUATION OF

MOSTARDI-PLATT PARK RIDGE PROJECT DATA

MONITORING ADJACENT TO O’HARE AIRPORT

by

CITY OF PARK RIDGE, ILLINOIS

ENVIRON International Corporation

Arlington, Virginia

Princeton, New Jersey

August 2000

VOLUME IV