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Acceptable procedures for testing organic matter content of soils by both the Walkley-Black method and LOI method are provided by North Central Regional Research Publication No. 221 (Combs and Nathan,2012). Acceptable procedures for testing organic matter content of compost or highly organic soils is provided by ASTM D2974-14, Standard Test Methods for Moisture, Ash, and Organic Matter of Peat and Other Organic Soils (ASTM International, 2014) and United States Department of Agriculture
Acceptable procedures for testing organic matter content of soils by both the Walkley-Black method and LOI method are provided by North Central Regional Research Publication No. 221 (Combs and Nathan,2012). Acceptable procedures for testing organic matter content of compost or highly organic soils is provided by ASTM D2974-14, Standard Test Methods for Moisture, Ash, and Organic Matter of Peat and Other Organic Soils (ASTM International, 2014) and United States Department of Agriculture
(USDA, 2002).
(USDA, 2002).
==Inspections==
As part of Construction inspections, if laboratory testing indicates soil organic matter content is not within the design or product specification range, notify the media or topsoil supplier, issue a “do not install” order to the construction site supervisor and contact the design professionals and property owner or project manager to determine corrective actions.
As part of Assumption and Verification inspections, if laboratory testing indicates soil organic matter content is not within the design or product specification range, or the Acceptance Criteria range (Table 8.1), schedule FIT work to do further sampling and testing to determine the affected area and depth and decide on corrective actions. Corrective action where organic matter is lower than the design/product specification or Acceptance Criteria involves amending the soil with compost.
Detailed guidance on implementing compost [[soil amendments]] can be found in Preserving and Restoring Healthy Soil: Best Practices for Urban Construction (TRCA 2012). Amendments to [[green roof growing media]] to address organic matter content deficiency should be prescribed by the designer, product vendor or media supplier. Where organic matter is higher than the design/product specification or Acceptance Criteria, natural or simulated storm event testing should be undertaken
(Section 8.5) that includes sampling and testing of nutrient concentrations (i.e., Phosphorus, Nitrogen, Soluble Salts) in sub-drain or surface flows from the BMP to evaluate if the exceedance is negatively impacting effluent quality.