COD readings 15Nov 07
	ppm	ppm	recalibrated ppm			Avg ppm
1a	-3.3			-3.3		-3.3
1b	17.7			18.4		18.05
1c	56.9	56.8		57.4		57.03333
1d	2.7			4.3		3.5
1e	14	12.6		14.9		13.83333
1f	-3.3			-1.1		-2.2
2a	29.8			31.3		30.55
2b	3.2	1.5		4.7		3.133333
2c	13.5			14.2		13.85
3a	4.2			6.5		5.35
3b	3.2	1.9		3.7		2.933333
4a	14.4			15.6		15
4b	5.1	4.2		6.1		5.133333
4c	19.6			21		20.3
5a	19.1	17.6		20.1		18.93333
5b	-3.3			-3.3		-3.3
5c	9			10.4		9.7
5d	0.1			1.5		0.8
5e	5.7			7.5		6.6
6a	12.1	10.2		12.6		11.63333
6b	8.2			9		8.6
6c	21.1			21.5		21.3
6d	10.9			12.9		11.9
6e	34.2			35.2		34.7
blank 1	0	0.1		0		0.033333
blank 2	4.2	3.3				3.75
blank 3	-1.6	-1.7		-2.9		-2.06667