ETL - Letter of Endorsement from Dr. William J. Nicholson to the National Cancer Institute

Letter of Endorsement from Dr. William J. Nicholson to the National Cancer Institute

Table 1. Regression Statistics for Control and 0-Toxicity

Test-Year	Test Group	# of Tests	Mean Slope	Coefficient of Variance
1998	LI 80-85 Controls	6	.0866	1.05
1998	LI 110-121 Controls	6	.0769	2.48
1998	LI 110-121 0-Tox	48	.0764	2.54
1998	LI 124-130 Controls	8	.0785	1.30
1998	LI 124-130 0-Tox	31	.0817	2.27
1999	Croton Watershed Reservoirs Controls	7	.0857	1.01
1999	Croton Watershed Reservoirs 0-Tox	66	.0864	3.29
2000	Croton Watershed Streams Controls	56	.0865	3.46
2000	Croton Watershed Streams 0-Tox	311	.0867	4.91

Figure 1. Whole Particle Toxicity in West Islip Tap Water Samples. 21 of 36 homes
had no measurable toxicity and are not included in the graphic.

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