Table 3.

Number of samples to each threshold according to the parametric limits of the EPA, NOAA, and regional index

		EPA			NOAA				Regional index
		Not polluted	Moderately polluted	Heavily polluted	Background	TEL	TEL-PEL	PEL	TGS	PPE
B A L U A R D	As				0	15	2	0	14	3
	Ba								0	17
	Cd		15	2	17	9	6	2	7	10
	Cr	14	3	0	5	12	0	0	0	17
	Cu	13	3	1	6	3	7	1	0	17
	Hg				0	6	8	3	1	16
	Ni				15	2	0	0	0	17
	Pb	10	1	6	1	7	6	3	0	17
	V								0	17
	Zn	13	1	3	8	5	3	1	0	17
P O R T I X O L	As				0	7	4	0	0	11
	Ba								0	11
	Cd	0	11	0	0	6	4	1	0	11
	Cr	11	0	0	10	1	0	0	0	11
	Cu	11	0	0	11	0	0	0	0	11
	Hg				0	11	0	0	0	11
	Ni		11	0	0	0	1	10
	Pb	11	0	0	10	0	1	0	0	11
	V								0	11
	Zn	11	0	0	11	0	0	0	0	11
T. G R O S	As				0	5	1	0	4	2
	Ba								1	5
	Cd	0	6	0	0	6	0	0	0	6
	Cr	6	0	0	5	1	0	0	2	4
	Cu	5	0	1	4	0	1	1	0	6
	Hg				0	2	0	0	6	0
	Ni		6	0	0	0	1	5
	Pb	6	0	0	5	1	0	0	1	5
	V								0	6
	Zn	5	1	0	5	1	0	0	0	6