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Title: Risk assessment for the Explosive Washout Lagoons (Site 4), Umatilla Depot Activity Hermiston, Oregon. Final report, Mar 91-Mar 92

This document is the Risk Assessment (RA) for the Explosive Washout Lagoons (Site 4) at Umatilla Army Depot Activity (UMDA). The purpose of this RA is to address the potential future health risks posed by explosives-contaminated soil and groundwater associated with Site 4 in the absence of remediation, and to identify safe residual explosives concentrations (remedial action criteria) in soil if remediation is determined to be a requirement. This RA is not intended to address the remediation of contaminated groundwater; contaminated groundwater is addressed only to the extent that contaminants in Site 4 soil are affecting groundwater quality. The potential remediation of contaminated groundwater will be addressed in the installation-wide Baseline RA for UMDA. Based on the available data, explosives contamination appears to be widespread in soil near the lagoons and in groundwater at distances of over 650 yards from the lagoons. Three future land use scenarios-residential, light industrial, and military-and four potential future exposure pathways-soil ingestion, dust inhalation, dermal contact with soil, and groundwater ingestion-were evaluated in the RA to estimate potential future carcinogenic hazards. The results of RA indicate that remediation may be a requirement for soil at Site 4; therefore, remedial action criteria for soil were developed.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
7250642
Report Number(s):
AD-A-253750/4/XAB
CNN: DAAA15-88-D-0008
Resource Type:
Technical Report
Research Org:
Dames and Moore, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 29 ENERGY PLANNING, POLICY AND ECONOMY; EXPLOSIVES; HEALTH HAZARDS; GROUND WATER; CONTAMINATION; MILITARY FACILITIES; POLLUTION; OREGON; SOILS; LAND POLLUTION; LAND USE; PUBLIC HEALTH; REMEDIAL ACTION; RISK ASSESSMENT; SITE SURVEYS; WATER POLLUTION; DEVELOPED COUNTRIES; FEDERAL REGION X; HAZARDS; HYDROGEN COMPOUNDS; NORTH AMERICA; OXYGEN COMPOUNDS; USA; WATER 540320* -- Environment, Aquatic-- Chemicals Monitoring & Transport-- (1990-); 540220 -- Environment, Terrestrial-- Chemicals Monitoring & Transport-- (1990-); 290300 -- Energy Planning & Policy-- Environment, Health, & Safety