Changes

===Recommended Lab Testing for Sediment Quality===

===Recommended Lab Testing for Sediment Quality===

The selection of sediment quality analysis parameters should reflect the Contributing Drainage Area's (CDA) land use characteristics and reported spill history. The following are the suggested minimum lists of analytes that would be suitable for sites with no history of point source contamination. It is recommended that the MECP be contacted to determine if any spill events or other site specific circumstances would require additional analytes as well. The following step-by-step process would provide the data needed to evaluate the feasibility of beneficial use of the sediment or landfill disposal options.

The selection of sediment quality analysis parameters should reflect the Contributing Drainage Area's (CDA) land use characteristics and reported spill history. The following are the suggested minimum lists of analytes that would be suitable for sites with no history of point source contamination. It is recommended that the [https://www.ontario.ca/page/report-pollution-and-spills MECP be contacted to determine if any spill events] or other site specific circumstances would require additional analytes as well. The following step-by-step process would provide the data needed to evaluate the feasibility of beneficial use of the sediment or landfill disposal options.

 

As required by [https://www.ontario.ca/laws/regulation/900347 O.Reg. 347], testing of leachate toxicity by the Toxicity Characteristic Leaching Procedure (TCLP), establishes whether or not the sediment is hazardous waste, which would then require proper disposal at a hazardous waste facility. The TCLP uses an acetic acid solution designed to simulate a possible worst-case leaching conditions scenario that could occur on a given study site that contains contaminated soils, or any other organic matter that will degrade over time (putrefaction) (Intrakamhaeng, et al. 2019<ref>Intrakamhaeng, V., Clavier, K.A., Roessler, J. G., and Townsend, T. G. 2019. Limitations of the toxicity characteristic leaching procedure for providing a conservative estimate of landfilled municipal solid waste incineration ash leaching, Journal of the Air & Waste Management Association, 69:5, 623-632, DOI: 10.1080/10962247.2019.1569172</ref>. This information is typically required by the MECP as a key first step in characterizing sediment. It may be advisable to conduct this analysis concurrently with Step 2 ([https://www.ontario.ca/laws/regulation/040153 O.Reg. 153/04 Bulk Soil Analysis]) so that samples for both tests can be collected during the same visit.