TABLE 1.

Summary of initial groundwater chemistry, push-pull test results, and sediment core characteristics

Groundwater well (corresponding sediment core)	Initial groundwater chemistryc			Push-pull test resultb (C/C0)d			Sediment core data (following biostimulation)e
	NO3− (mM)	U(VI) (μM)	pH	NO3−	EtOH	U(VI)	NO3− (mM)	NO2− (mM)	Biomass (106 cells/g)	% U as U(IV)
FW028 (FB064)	167.2	2.22	4.4	0.327	0.358	15.2	126.5	17.7	204	67.1
FW034 (FB067)	0.769	0.475	6.79	0.640	0.528	0.924	39.77	14.8	18.5	75.7
FW016 (FB066)a	11.4	2.58	3.92				2.612	9.98	5.58	4.6
FW021b	142.3	5.80	3.05

^aFW016 served as a control well.

^bFW021 groundwater was used for the injection solution for push-pull tests in FW028 and FW034.

^cData publicly available at http://public.ornl.gov/nabirfrc/frcsite3.cfm.

^dThese data represent analyte concentrations (C) on the first date of the extraction phase (on or near the date of sediment core sampling) compared to initial concentrations in the injection solution (C₀) and have been adjusted to account for loss due to dilution and dispersion, as determined by loss of bromide.

^eSediment core FB064 was obtained 5 days after the injection phase began and 3 days prior to the start of the extraction phase for well FW028; FB067 was sampled 31 days after the injection phase began and on the same day of the start of the extraction phase.