Tributary

Surface water

Sediment

YOY forage fish

Initial guidelines considered:

1 ng/L (PWQO) [53]

70 ng/g LEL [45]

277 ng/g PEL [44]

100 ng/g [17]

Tresholds adopted

>10 ng/L

277 ng/g

200 ng/g

Cataraqui River,

Kingston ON¹

n/a

225 ng/g [2]

420 ng/g [3]

3000 ng/g [4]

40 - 540 ng/g wet [4]

Etobicoke Creek,

Toronto ON

Mean 3.7 ng/L (CI: 1.6 - 8.8, n = 21) Dry, 19.1 ng/L (C.I.:6.7 - 54.7, n = 16) Wet [8] ; Identified as highest PCB load per unit area in Toronto area tributaries [9]

210 ng/g [4]

222 ng/g [1] ND-560 ng/g [4]

Mean: 207 ng/g wet (140 - 240; n = 3 composites of 5)

spottail shiners; mean: 186 ng/g wet (160 - 220: n = 5 composites of 5) common shiners collected in 2000 (OMOE, unpublished)

Twelve-Mile Creek,

St. Catharines ON

Mean 6. 2 ng/L

(2.4 - 12.3, n = 12) ng/L-event grabs [6]

Mean 1.1 ng/L (ND-2.3 ng/L, n = 13) 28 day composite (OMOE unpublished)

950 ng/g [4]

650 ng/g [5]

Mean 103 ng/g wet (160 - 220, n = 5 composites of 5)

(spottail shiners)

Mean 430 ng/g wet (620 - 800, n = 3 composites of 5) (emerald shiners)

(OMOE 2001 unpublished)

Twelve Mile Creek-Lake Gibson/Beaverdams Creek, Thorold, ON¹

Mean 7.8 ng/L (1.8 - 13.8, n = 3)

Large volume grab samples (OMOE unpublished, 2002)

Consultant report² documented concentrations exceeding 20 ug/g

452 - 724 ng/g wet

(OMOE 2002 unpublished)

Turkey Creek,

Windsor ON

Mean 2.43 ng/L (0.2 - 8.7, n = 15)

28 day time composite large volume

(OMOE unpublished, 2002)

780 ng/g [7]

Mean: 216 ng/g wet (range 180 - 260)-1998 Emerald shiners near tributary mouth;

Mean:123 ng/g wet (100 - 280, n = 5 composites of 5)

2001 near tributary mouth

(OMOE unpublished)

Little River,

Windsor ON

Mean 1.7 ng/L (0.6 - 3.8, n = 6)

28 day time composite large volume (OMOE unpublished, 2002)

1400 ng/g [7]

Mean: 92 ng/g wet (120 - 240, n = 5 composites of 5)

2001 spottail shiner data near mouth (OMOE unpublished)