2,4-D sediment sampling in conjunction with sediment pore water sampling on two herbicide treatment lakes - NOR_13_CMP13
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Purpose

Sediment pore water samples were collected on Little St .Germain Lake last year. The only sampling period where 2, 4-d concentrations were elevated was within the 12 days after treatment sampling period. All of the other sampling periods (pre treatment and post 56 days treatment) had low levels of 2,4-d. The purpose of this study is to do more intensive sampling of the sediment pore water and the sediment itself right after a herbicide treatment.

Objective

We are trying to determine the fate or how long 2,4-D remains in the environment right after granular herbicide application. We will intensively sample the sediment pore water and the sediment on two lakes that have had a history of 2,4-D herbicide application (including upcoming season). Sediment and pore water samples will be collected 2, 4, 6 and 8 days post treatment. Sediment pore water (2,4-D Immuno-assay)will be analysed by the US ARMY CORP under the CRADA agreement. Sediment samples wil be analysed by the SLOH for Total 2,4-D, 2,4-d Acid and 2,4-D Ester.

Outcome

We will learn how long 2,4-D remains in the sediment and sediment pore water in the first 8 days after treatment. If 2,4-D concentrations remain high in the lake sediments after 8 days, we will implement another field study in the late summer fall (See other proposed 2,4-d sampling project).

Study Design

Sites TBD. Two lakes will be selected (Little St. Germain Lake plus one more yet to be determined) that have had a history of 2,4-D herbicide treatment. Three sediment pore water samplers will be placed at each herbicide treatment site in each of the two lakes. Pore water samplers will be set the day of treatment and sampled and re-deployed on day 2,4,6 and 8 after treatment. A sediment sample will also be collected on the same days using an ekman dredge or core tube. If using an ekman dredge, 3 samples will be collected and composited into one sample. Samples will be collected by scuba diving.

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NOR_13_CMP13
2012
Complete
 
Reports and Documents
Little St. Germain Lake Sediment Pore water sampling 2011-2012 Presentation
Little St. Germain Lake Sediment Pore Water Sampling for Herbicide Residue. Presentation to summarize work conducted in 2011-2012 and planned work in 2013.
 
Activities & Recommendations
APM Chemical Permit Request
The purpose of this study is to do more intensive sampling of the sediment pore water and the sediment itself right after a herbicide treatment.
Monitor Water Quality or Sediment
The purpose of this study is to do more intensive sampling of the sediment pore water and the sediment itself right after a herbicide treatment.
 
Watershed
Sugar Camp Creek
 
Waters
Little Saint Germain Lake
Monitoring Data
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