Table 5.

Correlation analysis of observed values on second sampling date for HF183 compared to a theoretical data set for the sewage spike dilution series

Sewage dilution factora	Data and correlation analysis for siteb
	Fort DeSoto			Green Swamp			Lake Carroll			Hillsborough Riverc
	Observed quantity	Theoretical quantity	Correlation	Observed quantity	Theoretical quantity	Correlationn	Observed quantity	Theoretical quantity	Correlation	Observed quantity	Theoretical quantity	Correlation
10−2	5.13	5.11		5.59	5.59		5.08	5.08		3.91	3.91
10−3	4.66	4.11		3.64	4.59		4.08	4.08		4.05	2.91
10−4	3.28	3.11		2.04	3.59		3.34	3.08		3.10	1.91
10−5	2.56	2.11		2.21	2.59		NQd	NQ		NQ	NQ
r2 value			0.97			0.85			0.99			0.62
P value			0.0164			0.0785			0.0548			0.4205

^aDilution factor of 10⁻² represents 5 ml sewage inoculated into 500 ml water.

^bQuantities are expressed as log₁₀ gene copies · 100 ml⁻¹.

^cDNA extracted from Hillsborough River samples on both sample dates was further purified to relieve inhibition.

^dNQ, not quantifiable.