Balanced Environmental collecting sediment samples in the Fraser River.
Sediment sampling is the collection of marine, brackish or freshwater sediments from the seabed with either commercial divers or a grab device, like the PONAR Grab, so that it can be analyzed by a certified lab. Normally metals, PAHs and PCBs are tested, as well as grain size, moisture and pH.
Normally sediment sampling is a required on dredging or excavation projects in the marine environment. In order to dispose of the materials, the materials must be tested in accordance with tolerance thresholds for various chemicals as determined by provincial and federal regulations. For example, materials being disposed of at sea require a Disposal at Sea permit from Environment Canada.
Sampling requires that a person with sampling experience (i.e. Balanced Environmental) is hired by the proponent. For ocean disposal, the professional creates a sampling plan and submits it to Environment Canada for approval. Once approved, the professional gives Environment Canada 3 weeks notice of a proposed sampling date. Samples are collected normally with a PONAR grab and data is recording. Samples are submitted to a certified lab for analysis and the professional creates a sampling report for the proponent.
The majority of expenses are in the lab analysis. Labs charge from $650 to $1050 per sample depending on which type of analysis is required by Environment Canada. Most projects have 6 to 9 samples. Therefore, most sampling projects are at least $5,000.
Normally it takes at least 3 weeks for Environment Canada to resond to the sampling plan and an additional 3 weeks before they can be onsite. Further, it takes at least 2 weeks for the lab results to be processed by the lab and a week for the consultant to prepare the necessary documents. Therefore, the minimum turn around time is 9 weeks.
At the end of the sampling you get a sediment sampling report which contains the lab results and compares the results to the thresholds corresonpond to the method of disposal. These reports range from 20 to 100 pages.
Please send us an email at firstname.lastname@example.org or call (604) 988-3033 and ask for information on sediment sampling.
Section 9 Water Act
Species at Risk
Soil Contamination Testing
Design / Build Options
Disposal at Sea
Fisheries Act Authorizations
First Nations Consultation
Post Construction Surveys
Valued Project Services