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7 October 2015

Biosolids Activities at Dusty Road

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Status Update – Dusty Road

Wastewater treatment shut down in April

Composting trials of SWRC biosolids by Salish Soils from mid- March

Withdrawal of sludge from main lagoon by Sylvis from Apr-Oct

Replacement of blower for aerated lagoon October (energy savings)

Start of Geotube dewatering October. Expect complete de-sludging of lagoon

and racetrack by mid 2016

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Biosolids Volumes

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Septage Volumes

Annual total 2014 6270 cu.m Average weekday volume 24 cu.m/day Solids content 0.8% (summer 2015) Expect about 20 tons/month

dewatered septage

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Composting Trials by Salish Soils

Asked for use of site in 2014 for initial composting trials

Biosolids volumes not guaranteed by Sechelt

Existing sludge drying bed is suitable for composting

Expected duration 6 months

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Biosolids

Centrifuge dewatering to 20% solids Average production 2 tons per day 1.5 to 2 truckloads per week meeting all the metals requirements

for Class A compost

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Biosolids Composting by Salish Soils

Trials at Dusty Rd since March Good pile heating Approx 2:1 ratio woodchips to biosolids Moving offsite end of September

[correction – extension to end of Oct pending Council decision]

Expect first Class A Product in October [correction – final screened product not until 2016]

Available for sale in 2016

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Permitting

Dusty Road is Permitted under Waste Management Permit PE-4088

Includes “sludge digestion, drying and handling facilities”

Composting is a form of drying “sludge wasted from the treatment

plants shall be disposed of to a site and in a manner approved by the Director, or as authorized by regulation under the Waste Management Act”

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The Future

When composting activities finish, and the lagoons are emptied and decommissioned, only septage receiving and dewatering will remain

Then PE-4088 will be cancelled Site lease to 2031 “Land Swap” with LeHigh is still a

possibility.