2006 September – 2007 August: Bull Creek (WA). Pesticides: Multiple

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A baseline study of organic contaminants in the Swan and Canning catchment drainage system using passive sampling devices. Government of Western Australia Department of Water. December 2009

Bull Creek WA

The estimated concentration in water (ng/L) of insecticides predicted from the accumulation in PDMS strips deployed during September- October 2006.

Phosphate tri-n-butyl: 20ng/L (Replicate A), 20ng/L (Replicate B)

Diazinon: 14ng/L (Replicate A), 13ng/L (Replicate B)

Terbutryn: <3ng/L ( Replicate A), <3ng/L ( Replicate B)

Chlorpyrifos: 4ng/L ( Replicate A), 4.5ng/L ( Replicate B)

Fenitrothion: <3ng/L (Replicate A), <3ng/L (Replicate B)

Metolachlor: <7ng/L (Replicate A), <7ng/L (Replicate B)

Heptachlor Epoxide: <1ng/L (Replicate A), <1ng/L (Replicate B)

Chordane trans: <1ng/L (Replicate A), <1ng/L (Replicate B)

Oxadiazon: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Dieldrin: 2ng/L (Replicate A), 2ng/L (Replicate B)

Piperonyl Butoxide: 4ng/L (Replicate A), 4ng/L (Replicate B)

Propiconazole: <2ng/L (Replicate A), <2ng/L (Replicate B)

Mean ND% 4

The concentration in water (ng/L) of herbicides, detected in snapshot water samples collected during September – October 2006.

Diuron: 7.7ng/L

Simazine: 54ng/L

Atrazine: <1ng/L

Hexazinone: <1ng/L

Deployment period two; January – February 2007
The estimated concentration in water (CW) (ng/L) of herbicides predicted from ED passive samplers deployed in January – February 2007 in sub-catchments near Perth. The sampling rates used 0.12 L/day.

Diuron: (Replicate A) 9.4ng/ED, 2.5Cw. (Replicate B) 13ng/ED, 3.5Cw. 32 ND%

Simazine: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, <0.3Cw. – ND%

Atrazine: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, <0.3Cw. – ND%

Desethyl Atrazine: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, <0.3Cw. – ND%

Desisopropyl Atrazine: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, <0.3Cw. – ND%

Hexazinone: (Replicate A) 2.6ng/ED, 0.7Cw. (Replicate B) 6.8ng/ED, 1.8Cw. 26 ND%

Ametryn: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, <0.3Cw. – ND%

Mean ND 32%

The estimated concentration in water (ng/L) of insecticides predicted from PDMS passive samplers deployed during January – February 2007 in sub-catchments near Perth.

Phosphate Tri-n-butyl: 7ng/L (Replicate A), 5ng/L (Replicate B)

Trifluralin: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Diazinon: <6ng/L (Replicate A), <6ng/L (Replicate B)

Terbuthylazine: <8ng/L (Replicate A), <8ng/L (Replicate B)

Triallate: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Terbutryn: 27ng/L (Replicate A), 26ng/L (Replicate B)

Chlorpyrifos: 1.2ng/L (Replicate A), 0.9ng/L (Replicate B)

Chlordane Trans: 0.1ng/L (Replicate A), 0.1ng/L (Replicate B)

Dieldrin: 2ng/L (Replicate A), 2ng/L (Replicate B)

Propiconazole: <3ng/L (Replicate A), <3ng/L (Replicate B)

Mean ND%: 13

Deployment period three; April – May 2007
The estimated concentration in water (CW) (ng/L) of herbicides predicted from ED passive samplers deployed in January – February 2007 in sub-catchments near Perth. The sampling rates used 0.12 L/day.

Diuron: (Replicate A) 48ng/ED, 15Cw. (Replicate B) 36ng/ED, 11Cw. 28 ND%

Simazine: (Replicate A) 43ng/ED, 13Cw. (Replicate B) 40ng/ED, 13Cw. 5.8 ND%

Atrazine: (Replicate A) 8.4ng/ED, 2.7Cw. (Replicate B) 10ng/ED, 3.3Cw. 20 ND%

Desethyl Atrazine: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, <0.3Cw. – ND%

Desisopropyl Atrazine: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) <1ng/ED, <0.3Cw. – ND%

Hexazinone: (Replicate A) <1ng/ED, <0.3Cw. (Replicate B) 2.3ng/ED, 0.7Cw. – ND%

Mean ND 18%

The concentration in water (ng/L) of herbicides, detected in snapshot water samples collected during April – May 2007.

Diuron: Replicates 23 Apr 10ng/L, 23 Apr 10ng/L. Mean 23 Apr 10ng/L

Simazine: Replicates 16 Apr 19ng/L, 23 Apr 29ng/L. Mean 23 Apr 24ng/L

Atrazine: Replicates 16 Apr <0.1ng/L, 23 Apr 4.4ng/L. Mean 23 Apr 2.2ng/L

Desethyl Atrazine: Replicates 16 Apr <1ng/L, 23 Apr <1ng/L. Mean 23 Apr <1ng/L

Desisopropyl Atrazine: Replicates 16 Apr <1ng/L, 23 Apr <1ng/L. Mean 23 Apr <1ng/L

Hexazinone: Replicates 16 Apr <1ng/L, 23 Apr 1ng/L. Mean 23 Apr <1ng/L

Ametryn: Replicates 16 Apr <1ng/L, 23 Apr <1ng/L. Mean 23 Apr <1ng/L

The estimated concentration in water (ng/L) of insecticides predicted from PDMS passive samplers deployed during April – May 2007 in subcatchments near Perth.

Phosphate Tri-n-Butyl: 16ng/L (Replicate A), 16ng/L (Replicate B)

Trifluralin: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Diazinon: 11ng/L (Replicate A), 12ng/L (Replicate B)

Propazine: <10ng/L (Replicate A), <10ng/L (Replicate B)

Terbutryn: <3ng/L (Replicate A), <3ng/L (Replicate B)

Chlorpyrifos: 12ng/L (Replicate A), 11ng/L (Replicate B)

Metolachlor: <8ng/L (Replicate A), <8ng/L (Replicate B)

Hepatchor Epoxide: <1ng/L (Replicate A), <1ng/L (Replicate B)

Chlordane Trans: <1ng/L (Replicate A), <1ng/L (Replicate B)

Oxadiazon: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Dieldrin: 2ng/L (Replicate A), <0.5ng/L (Replicate B)

Piperonyl Butoxide: 5ng/L (Replicate A), 5ng/L (Replicate B)

Benalaxyl: <3ng/L (Replicate A), <3ng/L (Replicate B)

Propiconazole: <3ng/L (Replicate A), <3ng/L (Replicate B)

Bifenthrin: <1g/L (Replicate A), <1ng/L (Replicate B)

Rotenone: <2ng/L (Replicate A), <2ng/L (Replicate B)

Mean ND 3.5%

Deployment period four; July – August 2007
The estimated concentration in water (ng/L) of herbicides predicted from ED passive samplers deployed in July – August 2007 in subcatchments near Perth. The sampling rates used 0.12 L/day.

Diuron: 6.1ng/L (Replicate A), 6.8ng/L (Replicate B)

Simazine: 130ng/L (Replicate A), 140ng/L (Replicate B)

Atrazine: 1.3ng/L (Replicate A), 1.5ng/L (Replicate B)

Desethyl Atrazine: <1ng/L (Replicate A), <1ng/L (Replicate B)

Desisopropyl Atrazine: 7.1ng/L (Replicate A), 8.6ng/L (Replicate B)

Hexazinone: <1ng/L (Replicate A), <1ng/L (Replicate B)

Tebuthiuron: <1ng/L (Replicate A), <1ng/L (Replicate B)

The estimated concentration in water (ng/L) of insecticides predicted from PDMS passive samplers deployed during July – August 2007 in subcatchments near Perth.

Phosphate Tri-n-Butyl: >30ng/L (Replicate A), >30ng/L (Replicate B)

Trifluralin: 1ng/L (Replicate A), 1ng/L (Replicate B)

Diazinon: 6ng/L (Replicate A), 9ng/L (Replicate B)

Triallate: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Terbutryn: 39ng/L (Replicate A), 54ng/L (Replicate B)

Chlorpyrifos: 7ng/L (Replicate A), 9ng/L (Replicate B)

Metolachlor: <8ng/L (Replicate A), <8ng/L (Replicate B)

Hepatchor Epoxide: <1ng/L (Replicate A), <1ng/L (Replicate B)

Pendimethalin: <1ng/L (Replicate A), <1ng/L (Replicate B)

Chlordane Trans: <1ng/L (Replicate A), <1ng/L (Replicate B)

Methidathion: <30ng/L (Replicate A), <30ng/L (Replicate B)

Oxadiazon: <0.5ng/L (Replicate A), <0.5ng/L (Replicate B)

Dieldrin: 3ng/L (Replicate A), 4ng/L (Replicate B)

Piperonyl Butoxide: 7ng/L (Replicate A), 7ng/L (Replicate B)

Benalaxyl: 3ng/L (Replicate A), 3ng/L (Replicate B)

Propiconazole: <3ng/L (Replicate A), <3ng/L (Replicate B)

Bifenthrin: <1ng/L (Replicate A), 1ng/L (Replicate B)

Mean ND 17