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

Technical Report · Sun Mar 01 00:00:00 EST 1992

OSTI ID:7250642

Leinbach, A; Enright, A M; Eaton, W; Lemont, S

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.

• Research Organization: Dames and Moore, Washington, DC (United States)
• OSTI ID: 7250642
• Report Number(s): AD-A-253750/4/XAB; CNN: DAAA15-88-D-0008
• Country of Publication: United States
• Language: English

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