You are to Review the various case study documents provided along with the specific case scenario information below. Once completed, each group will do the following:

$$ Compare the finding with the various surface$/$bulk sample results collected

$$ Identify if mould growth is occurring and if so$,$ what the likely source of the growth is

$$ Compare samples collected within the assessment area to the applicable reference sample$($s$)$

$$ Identify which, if any, specific mould spores exceed the reference levels

$$ If applicable, identify if the air quality is being negatively impacted by mould amplification

$$ What would your recommendations be for all stakeholders in this situation?

According to the client, a small fire occurred within the warehouse in the evening of December $17,2012$ while the warehouse was unoccupied. After an initial drop in the sprinkler water pressure $($due to $4$ sprinkler heads from within the warehouse being activated by the fire$),$ the sprinkler line was re$-$pressurized by a diesel water pump servicing the building. Reportedly, the alarm company keeping track of the sprinkler system called Mr$.$ Narang at approximately $11$PM to inform him that there was a drop in pressure in the sprinkler line. The alarm company indicated that the drop in pressure was a false alarm $($due to the immediate re$-$pressurization$),$ and that a visit to the site was not necessary. When Mr$.$ Narang arrived at the site the next morning $($approximately $9$ hours later$),$ it was discovered that the $4$ heads of the sprinkler system had been discharging water since the drop in sprinkler water pressure was first reported.

Upon discovery of the extensive water loss, an abatement company was contracted to clean up the fire and water damage. Removal of affected materials and drying of surfaces was conducted in the first floor show rooms and offices. Reportedly, standing water in the warehouse was removed and mopping of the floor was conducted: drying building and contents, removal of damaged materials, dehumidification and other water damage remediation activities was not conducted for the warehouse portion of the building.

The water level in some areas of the warehouse was reportedly one to two feet in depth. The relative humidity reading in the office and showrooms in the days following the water loss was reportedly as high as $82\%.$

On January $9$ and $10,2013$ a post fire, water damage and mould assessment was conducted within selected areas of a warehouse. The objective of this assessment was to determine the extent of fire, water and mould contamination for building materials and stored products within Units $1$ and $2$ of the warehouse. Findings and subsequent recommendations made are based on the visual inspection, indoor ambient air temperature, moisture measurements and relative humidity measurements performed on the date of this assessment.

Upon arriving at the site, it was noted that some of the pallets and boxes directly on the concrete floor were still wet as a result of the water loss on December $17,2012.$ Extensive mould was observed on contents within the $$Spray Zone$$ as well as along the boxes and pallets throughout the warehouse $($refer to Photographs $1).$ Confirmation of the spray pattern and distance of spray from the sprinklers was to be identified by the sprinkler manufacturer.

Due to the time that has passed since the initial water loss and the absence of any drying operations within the warehouse, mould contamination is now present on warehouse contents $($refer to Photographs $1$ & $2).$ The mould contamination was observed along wood pallets on the concrete floors throughout the warehouse $($refer to Photograph $3$ for a photo of mould contamination on a pallet by the Shipping & Receiving bays$).$

Active disturbance of mould contaminated building materials $($i$.$e$.$ movement of contaminated boxes and pallets$)$ has been occurring since the water loss: if pallets continue to be disturbed without proper mould abatement protocol, there is a risk that additional cross contamination will occur, which may affect clean areas of the building.

Since the initial fire and water loss, various contents that were stored on the concrete floor or within the $$Spray Zone$$ of the sprinklers have been moved from Unit $2$ into Unit $1.$ During the site visit of January $9$ and $10,$ mould contamination was observed to be present along some of the cardboard boxes, the contents within the boxes, and along some of the wood pallets $($refer to Photographs $5$ & $6).$

Refer to Table I for a summary of affected building materials and recommend actions that should be conducted for Units $1$ and $2.$ TABLE I

Summary of Affected Building Materials

Location$/$ Description Materials Action Quantity Obvious Visible Mould

$($Yes$/$No$)$ Mould Abatement Operation

Unit $2-$ area inside $$Spray Zone$$ of the $4$ sprinkler