Landfill Odor Action Plan

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Landfill Odor Action Plan




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Presentations text content in Landfill Odor Action Plan

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Landfill Odor Action Plan

Utilities Department

October 6, 2015

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Presentation Overview

BackgroundOperational ChangesCommunity Outreach

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Presentation Overview

BackgroundOperational ChangesCommunity Outreach

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Slide4

Background

Landfill

Mission:

Provide environmentally safe and economically efficient disposal

Operating since 1971

Located on 5,000 acresRemaining life-50 to 75 years

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Slide5

Background

Generated during waste decomposition

Approximately 50% methane, an odorless gas, with the remainder being mostly carbon dioxideGas is sent to the Orlando Utilities Commission Stanton Energy Center to generate power for up to 15,000 homes

Landfill Gas

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Slide6

Background

Trace

amounts of other gases, including hydrogen sulfide (H2S), make up the remainder H2S has a “rotten egg” smell H2S detectable at 4 parts per billion (ppb) H2S OSHA health standards below 20,000 ppb H2S recorded beyond the landfill was 48 ppb, maximum H2S at these low levels is not toxic or hazardous

Landfill Gas

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Background

Class III

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Class III

Cell 1

Closed Cell AK

Closed Cell 7B

Closed Cell 8

Active Cell 9

Cell 10

Future

Cell 11

Future Cell 12

Compost Yard

Slide8

Background

Locations of Odor Complaints in 2015

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Background

Odor Contributors

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ctive landfill is growing Landfill elevation is above the tree lineHigh rainfall increases odor generationPrevailing winds north and northwest during rainy seasonStarting April 2013, Construction and Demolition (C&D) waste was disposed of with the Municipal Solid Waste (MSW, or household waste)Construction and Demolition (C&D) mixed with MSW has been found to produce higher concentrations of H2S than MSW or C&D alone

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Presentation Overview

BackgroundOperational ChangesCommunity Outreach

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Actions Taken To Date

Expanded landfill gas collection system

Installed misters designed to reduce objectionable odorsInitiated closure of a portion of the landfillHired a consultant to evaluate and develop solutionsEstablished a monitoring program to measure H2S in areas around the landfillBegan separating C&D waste from the MSW

Operational Changes

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Actions Taken To Date

Consultant Information

SCS Engineers (SCS) Conducted numerous landfill related odor studies throughout the U.S. recommending comprehensive lists of mitigation methods to reduce odor problemsHSA Golden (HSA) has worked on odor issues at the Golden Gem Road Class III landfill in Apopka and the West Orange Environmental Construction and Demolition facility resulting in reduced odorsGrove Scientific & Engineering Company (GSE) Wrote the Florida Department of Environmental Protection approved odor impact study for the Osceola Class III landfill, performed community monitoring and provided a successful odor control action plan for the Pine Ridge landfill

Operational Changes

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Operational Changes

Increase soil cover on landfillStop using tarps for daily coverContinue to log odor issuesExpand misting systemApply odor control enzymes at the landfill Separate Construction and Demolition waste from the MSWImprove landfill gas and stormwater collection systems after recent extensive rainContinue to monitor for H2S in surrounding communities

Short Term Solutions

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Operational Changes

Long Term Solutions

Increase landfill gas collection system capacityInstall final cover when feasibleEvaluate landfill operational procedures Maintain separate C&D and MSWImplement recommendations from odor assessment

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Presentation Overview

BackgroundOperational ChangesCommunity Outreach

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Community Outreach

Community meeting

invite sent to 2,000 residencesMeeting held at Utilities Admin Building on September 16, 6:00 p.m.46 attendeesFollow up meeting scheduled for October 28Information to be posted on county website

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Landfill Odor Action Plan

Utilities Department

October 6, 2015

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