Analysis of Pesticides in Surface Water and Sediment from Yolo Bypass, California, 2004–2005
By
Kelly L. Smalling, James L. Orlando, and Kathryn M. Kuivila
Table 8
Total organic carbon and pesticide concentrations detected in water and suspended sediments collected from the Yolo Bypass, California, in 2004 and 2005.
[
ng/L
, nanogram per liter (for concentrations detected in water);
µg/kg
, microgram per kilogram (for suspended sediments)]
| Site |
Date (mm/dd/yy) |
Time (hh:mm) |
Sample type |
Organic carbon (%) |
Bifenthrin |
Chlorpyrifos- |
Diazinon |
Hexazinone |
Methidathion- |
Metolachlor |
Molinate |
Oxyfluorfen |
| Knights Landing Ridge Cut |
2/20/04 |
15;30 |
Water |
na |
nd |
nd |
160 |
987 |
30.3 |
32.2 |
24.2 |
56.6 |
| |
1/03/05 |
11:00 |
Water |
na |
nd |
nd |
nd |
300 |
nd |
21.9 |
8.1 |
14.7 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Putah Creek |
2/20/04 |
13:20 |
Water |
na |
nd |
nd |
nd |
14.4 |
nd |
nd |
nd |
nd |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Willow Slough |
1/03/05 |
13:00 |
Water |
na |
nd |
nd |
nd |
9210 |
nd |
74.9 |
nd |
27.1 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Knights Landing Ridge Cut |
2/20/04 |
15:30 |
Suspended sediment |
1.2 |
nd |
nd |
nd |
nd |
nd |
(0.4) |
2.4 |
16.3 |
| |
1/03/05 |
11:00 |
Suspended sediment |
1.3 |
nd |
(0.5) |
nd |
nd |
nd |
(1.2) |
4.5 |
26.4 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Putah Creek |
2/20/04 |
13:20 |
Suspended sediment |
1.5 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Willow Slough |
1/03/05 |
13:00 |
Suspended sediment |
2.1 |
(1.7) |
1.3 |
nd |
9.4 |
nd |
3.9 |
nd |
50.1 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Site |
Date (mm/dd/yy) |
Time (hh:mm) |
Sample type |
Organic carbon (%) |
Pendimethalin- |
Simazine |
Tau-fluvalinate |
Thiobencarb |
Trifluralin |
p,p′ DDD |
p,p′ DDE |
p,p′ DDT |
| Knights Landing Ridge Cut |
2/20/04 |
15:30 |
Water |
na |
11.1 |
511 |
nd |
26.9 |
9.6 |
nd |
nd |
nd |
| |
1/03/05 |
11:00 |
Water |
na |
9.5 |
189 |
nd |
nd |
nd |
nd |
nd |
nd |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Putah Crk |
2/20/04 |
13:20 |
Water |
na |
nd |
45.6 |
nd |
nd |
nd |
nd |
nd |
nd |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Willow Slough |
1/03/05 |
13:00 |
Water |
na |
3.8 |
128 |
nd |
nd |
17.4 |
nd |
nd |
nd |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Knights Landing Ridge Cut |
2/20/04 |
15:30 |
Suspended sediment |
1.2 |
2.7 |
nd |
1.4 |
11.7 |
(0.9) |
(0.9) |
2.8 |
nd |
| |
1/03/05 |
11:00 |
Suspended sediment |
1.3 |
8.3 |
nd |
11.1 |
24.3 |
2.4 |
2.4 |
2.8 |
1.9 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Putah Creek |
2/20/04 |
13:20 |
Suspended sediment |
1.5 |
1.7 |
nd |
nd |
nd |
1.5 |
(1.1) |
4.3 |
(1.3) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Willow Slough |
1/03/05 |
13:00 |
Suspended sediment |
2.1 |
2.8 |
nd |
2.7 |
1.7 |
5.0 |
1.5 |
4.0 |
nd |