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TABLE OF CONTENTS<br />

DOFJR1.2001-11<br />

Rev. e-LPrsft j_3<br />

Rcdlinc/Stril^crnrt<br />

C RISK MODELING OF AN ENGINEERED SURFACE BARRIER FOR<br />

THE 221-U FACIIITY ................................................................................................... C-1<br />

FIGURE<br />

C.1 MODELING APPROACH, INPUTS, AND RESULTS ....................................C-1<br />

C.1.1 Similarityof Waste Disposal at the 221-U Facility to the<br />

Environmental Restoration Disposal Facility ..........................................C-1<br />

C.1.2 Specific Results of Modeling Fate and Transport to Groundwater<br />

at the 221-U Facility or ERDF ............. :........................... _.............. ....... C-2<br />

C.1.3 Results of Modeling a Disposal Facility with Clay Admix Liner.... ....... C-3<br />

C.2 REFERFNCES .................................................. ................................................... C-3<br />

C-1. Runoff Coefficient Graph ................................................................................................C-6<br />

TABLES<br />

C-1. RESRAD Input Parameters for Modeling Groundwater Protection at the<br />

221-U Facility and ERDF ...............................................................................................C-7<br />

C-2. Carbon-14 and Technetium-99 Breakthrough to Groundwater at Different<br />

Precipitation Rates ................................................................................. _........................ C-8<br />

Final Fea.ribiliry S+udy jor die Canyon Disposition lnfHarive (221•t/ Faciliry)<br />

June2003 C-iii

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