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===Assumption and Verification inspections===
===Assumption and Verification inspections===
If laboratory testing indicates soil soluble salts concentration is higher than the design or product specification, or acceptance criteria, corrective actions are only needed if problems with vegetation cover , condition or composition (i.e., dominance by weeds) are also detected through visual inspection. Where vegetation cover is poor, unhealthy or dominated by weeds and soluble salts are higher than the design or product specification or Acceptance Criteria, schedule investigative work to do further sampling and testing to determine the affected area and depth and decide on corrective actions. Depending on the findings, corrective action could involve flushing the soil area with fresh water or removal and replacement of an uppermost portion of the media with material that meets the design or product specification. Corrective actions to address soluble salts exceedance in green roof media should be prescribed by the designer, product vendor or media supplier.
If laboratory testing indicates soil soluble salts concentration is higher than the design or product specification, or acceptance criteria, corrective actions are only needed if problems with vegetation cover , condition or composition (i.e., dominance by weeds) are also detected through visual inspection. Where vegetation cover is poor, unhealthy or dominated by weeds and soluble salts are higher than the design or product specification or Acceptance Criteria, schedule investigative work to do further sampling and testing to determine the affected area and depth and decide on corrective actions. Depending on the findings, corrective action could involve flushing the soil area with fresh water or removal and replacement of an uppermost portion of the media with material that meets the design or product specification. Corrective actions to address soluble salts exceedance in green roof media should be prescribed by the designer, product vendor or media supplier.
==References==
[[Category: testing]]
[[Category: testing]]
[[category: inspections]]
[[category: inspections]]