Tetra Tech. June 26, 1992. Reconnaissance survey of the lower Columbia River. Task 2 summary report: Inventory and characterization of pollutants. Prepared for Lower Columbia River Bi-State Committee. Tetra Tech, Inc., Redmond, WA. 82 pp. (TC 8526-02).
Tetra Tech. August 22, 1991. Reconnaissance survey of the lower Columbia River. Task 2 report: List of sources of information to evaluate. Prepared for Lower Columbia River Bi-State Committee. Tetra Tech, Inc., Redmond, WA. 8 pp. (TC 8526-02).
Tetra Tech. April 29, 1992. Reconnaissance survey of the lower Columbia River. Task 1: Final summary report. Prepared for Lower Columbia River Bi-State Committee. Tetra Tech, Inc., Redmond, WA. 36 pp. (TC 8526-01).
Tetra Tech. May 13,.1992. Reconnaissance survey of the lower Columbia River. Task 1: Summary of existing data and preliminary identification of problem areas and data gaps (2 volumes). Volume II: Appendices. Prepared for Lower Columbia River Bi-State Program. Tetra Tech, Inc., Redmond, WA. (TC 8526-01).
Tetra Tech. May 13, 1992. Reconnaissance survey of the lower Columbia River.
Tetra Tech. August 22, 1991. Reconnaissance survey of the lower Columbia River. Task 1 report: Problem area and data gap identification ranking framework. Prepared for Lower Columbia River Bi-State Committee. Tetra Tech, Inc., Redmond, WA. 20 pp. (TC 8526-01).
Tetra Tech. August 5, 1991. Reconnaissance survey of the lower Columbia River. Task 1 list of material to evaluate. Prepared for Lower Columbia River Bi-State Committee. Tetra Tech, Inc., Redmond, WA. 79 pp. (TC 8526-01).