standard deviation

Metals	Ocean shore L1	Ocean shore L 2	PEC*
Cr	0.02 ± 0.001^b	4.19 ± 0.038^a	111
Cd	0.35 ± 0.021^a	0.38 ± 0.025^a	5
P^b	0.95 ± 0.023^a	1.00 ± 0.025^a	128
Cu	0.24 ± 0.007^b	1.44 ± 0.028^a	149
Zn	3.11 ± 0.110^a	2.12 ± 0.035^b	159
Ni	0.01 ± 0.003^a	0.01 ± 0.007^a	-----

Data are mean of duplicate (2) determinations. BDL: Below instrument detection limit.
Letters a and b show differences among the different locations. Data shown with different letters are statistically different at P<0.05 level.
*PEC- Probable effect concentration *L1 - Location One *L2 - Location Two

Table 2: Mean results and standard deviation of heavy metals (mg/kg) in sediment samples from the two sampled locations.