JEQ -- Van Cuyk et al. 33 (1): 316 Figure IG4

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Fig. 4. Percent removal of total applied PRD-1 and MS-2 bacteriophage after 8 and 45 wk of operation. L2, open, 90-cm vadose zone; L3, gravel, 90 cm; L4, gravel, 60 cm; L5 open, 60 cm.