A Conceptual Model of Ground-Water Flow in the Eastern Snake River Plain Aquifer at the Idaho National Laboratory and Vicinity with Implications for Contaminant Transport

Scientific Investigations Report 2006-5122

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5122

Table 1. Summary of surface and subsurface wastewater disposal at selected facilities, Idaho National Laboratory, Idaho.

[Estimated disposal quantities: Estimated disposal quantities for Test Area North, Test Reactor Area, and Idaho Nuclear Technology and Engineering Center from French and others (1999). Estimated disposal quantities for the Radioactive Waste Management Complex from Mann and Knobel (1987) and Becker and others (1998). Contaminant concentrations from Mann and Beasley (1994), Bukowski and others (1998), and Bartholomay and others (2000). Abbreviations: MCLs, U.S. Environmental Protection Agency maximum contaminant levels for drinking water; Ci, curies; ¹³⁷Cs, cesium-137; ³H, tritium; ⁹⁰Sr, strontium-90; TCE, trichloroethene; PCE, tetrachloroethene; DCE, cis- and trans-1,2-dichloroethene; Cr, chromium, ¹²⁹I, iodine-129; CCl₄, carbon tetrachloride; gal, gallon]

Facility	Disposal site	Years of disposal	Estimated disposal quantities	Contaminants with concentrations exceeding MCLs in ground water
Test Area North	Well, pond	1953 to 1993	61 Ci 717 million gal	¹³⁷Cs, ³H, ⁹⁰Sr, TCE, PCE, DCE
Test Reactor Area	Well, ponds	1952 to present	53,879 Ci 5,180 million gal	³H, Cr
Idaho Nuclear Technology and Engineering Center	Well, ponds	1952 to present	22,254 Ci 19,165 million gal	³H, ⁹⁰Sr, ¹²⁹I
Radioactive Waste Management Complex	Excavation pits, trenches	1952 to present	1,532,600 Ci 0.09 million gal	CCl₄

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