TABLE 3.

CoM levels in various sediments and CoM levels per cell for sediments

Environmental sample	Depth (ft)	Amt of CoM		MPN estimation procedure
		nmol/g of sediment	nmol/ml	No. of cells/ml	fmol of CoM/cell
Pond sediment		0.02	0.06	1.5 × 105	0.40
Landfill sediment		0.01	0.02	1.1 × 105	0.18
Sewage sludge		0.09	0.22	4.6 × 105	0.48
Hydrocarbon-contaminated sediment	2.5	0.00	NDa	ND
	3.0	0.02	0.05	7.5 × 104	0.67
	4.0	0.08	0.20	3.3 × 105	0.47
	5.5	0.07	0.18	2.2 × 105	0.65
	7.5	0.08	0.20	3.6 × 105	0.43
	8.5	0.07	0.19	2.7 × 105	0.55
	10.0	0.07	0.17	1.6 × 105	0.74

^aND, not determined.