Table 2.

Contents of PAHs in grass (μg kg⁻¹)

Year	Site A		Site B				Site C
			Meanc	SD	Min.	Max.
2007a	Naph	533	120	54	60	208	66
	Fluo	95	22	19	7	64	8
	Phen	463	163	69	102	301	105
	Ant	123	31**	18	18	70	18
	Flt	1547	383***	155	214	648	228
	Pyr	1135	226**	114	130	423	155
	BaA	634	88***	56	36	135	78
	Chry	1276	160**	136	49	276	192
	BbF	1174	153**	89	52	282	200
	BkF	402	53***	25	21	84	50
	BaP	459	46*	25	20	92	40
	DahA	139	16*	9	6	33	20
	BghiP	405	51**	33	19	90	67
	IcdP	650	79**	43	34	143	50
	∑2-ring PAHs	533 (5%)	120 (8%)	54	60	208	66 (6%)
	∑3-ring PAHs	681 (10%)	216 (14%)	104	132	435	131 (7%)
	∑4-ring PAHs	4592 (51%)	858*** (53%)	439	429	1482	653 (51%)
	∑5-ring PAHs	2174 (24%)	268** (16%)	139	103	448	310 (24%)
	∑6-ring PAHs	1055 (10%)	131** (9%)	74	53	233	117 (12%)
	∑ PAHs	9035	1591*				1277
	CP	909	102***	55	45	183	102
2010b	Naph	98	119	22	90	155	103
	Fluo	27	33	10	17	50	(0.9)
	Phen	67	111	23	85	141	73
	Ant	2	6**	3	3	11	8
	Flt	27	67***	18	47	89	57
	Pyr	23	43**	8	35	55	44
	BaA	1	11***	8	(0.9)	19	15
	Chry	13	24**	6	17	31	26
	BbF	3	14**	8	(0.9)	25	17
	BkF	2	3***	6	(0.9)	13	4
	BaP	15	24*	6	18	35	28
	DahA	3	5*	3	1	10	6
	BghiP	11	15**	8	(0.9)	25	19
	IcdP	8	18**	6	10	28	22
	∑2-ring PAHs	98 (33%)	119 (25%)	22	90	155	103 (24%)
	∑3-ring PAHs	96 (32%)	150 (30%)	23	125	187	81 (19%)
	∑4-ring PAHs	64 (21%)	145*** (29%)	36	102	186	142 (34%)
	∑5-ring PAHs	23 (8%)	46** (9%)	22	20	82	55 (13%)
	∑6-ring PAHs	19 (6%)	33** (7%)	13	10	53	41 (10%)
	∑ PAHs	300	493*				422
	CP	21	34***	12	22	54	40

^aSamples affected by emission from aluminum smelter

^bSamples collected after emission period

^cStatistical significance between different years (n = 7, t test *p < 0.05, **p < 0.01, ***p < 0.001)

(%) Percentage values (m/m)