Polycyclic Aromatic Hydrocarbons in Urban Stream Sediments

Table 1

Observed PAHs concentration by creek sediment particle sizes and associated standard deviation (all samples combined).

PAH	Mean concentration (μg/kg) (standard deviation)
	<45 μm	45–90 μm	90–180 μm	180–355 μm	355–710 μm	710–1400 μm	1400–2800 μm	>2800 μm (w/o LOM*)	>2800 μm LOM
Naphthalene	255 (275)	177 (156)	163 (224)	94 (87)	124 (131)	790 (2046)	891 (2014)	124 (74)	2637 (2107)
Fluorene	257 (295)	189 (134)	225 (187)	125 (135)	139 (140)	196 (144)	293 (173)	216 (161)	1771 (945)
Phenanthrene	264 (278)	205 (211)	140 (158)	92 (92)	110 (85)	130 (136)	197 (230)	188 (164)	2007 (1422)
Anthracene	354 (397)	288 (273)	261 (253)	152 (150)	182 (182)	366 (314)	491 (614)	218 (152)	2255 (1089)
Fluoranthene	650 (868)	624 (753)	345 (372)	202 (242)	247 (336)	259 (237)	237 (197)	191 (173)	1520 (902)
Pyrene	653 (738)	519 (548)	412 (577)	175 (174)	240 (405)	207 (153)	192 (122)	172 (129)	2054 (954)
Benzo(a)anthracene	501 (595)	408 (537)	258 (286)	169 (171)	224 (229)	167 (134)	271 (252)	278 (371)	2164 (1045)
Chrysene	591 (618)	602 (689)	363 (363)	202 (199)	273 (268)	190 (125)	296 (242)	171 (130)	1810 (852)
Benzo(b)fluoranthene	597 (522)	517 (598)	358 (389)	402 (671)	227 (150)	316 (262)	375 (369)	329 (375)	2179 (1425)
Benzo(a)pyrene	1474 (2210)	1524 (3079)	662 (459)	434 (513)	351 (210)	502 (533)	1119 (2086)	392 (255)	2330 (1866)
Indeno(1,2,3-cd)pyrene	787 (544)	657 (538)	942 (794)	258 (187)	332 (189)	576 (774)	706 (917)	357 (424)	1774 (933)
Dibenz(a,h)anthracene	1267 (1864)	787 (1022)	675 (545)	276 (234)	355 (226)	687 (511)	835 (1254)	286 (191)	1492 (775)
Benzo(g,h,i)perylene	706 (686)	465 (451)	591 (691)	199 (226)	174 (116)	551 (567)	396 (299)	348 (229)	2236 (1728)

*Sediment size fraction organic material removed.