OCWRC Hydrogen Sulfide Problems-20100908-430pm

OCWRC HydrogenOCWRC HydrogenSulfide ProblemsSulfide Problems

Identification Testing and RehabilitationIdentification, Testing and Rehabilitation

Collection System Rehab – Back to Basics

September 9, 2010

Douglas A. Buchholz, P.E.

Director of OperationsMichael McMahon, P.E.

Assistant Chief Engineer

WRC OverviewWRC OverviewInfrastructure

Electrical systems lake level controls lake improvement– Electrical systems, lake level controls, lake improvement boards, pump maintenance, retention treatment basins, sewer and drain maintenance, wastewater treatment, laboratory services water system operation andlaboratory services, water system operation and maintenance

Inspection / Planning / PermittingC ti i i i i ti I d t i l– Cross connection, engineering review, inspections, Industrial Pretreatment Program (IPP), Miss Dig, project management, soil erosion

Customer Service– Emergency services, environmental, storm water

requirements / regulations, public education, Geographic q g , p , g pInformation Systems (GIS), CAMS, water and sewer billing

County MapCounty Mapy py p

Sanitary Sewer SystemsSanitary Sewer Systemsy yy y• 726 miles of Laterals• 251 miles of Interceptor• 117 miles of Forcemain• 117 miles of Forcemain• 127 Pump Stations• 2040 Grinder Pump Stations• 4 CSO RTBs4 CSO RTBs• 2 WWTPs+

Criteria for IdentificationCriteria for IdentificationCriteria for IdentificationCriteria for Identification• Force Main Discharges• Drop Connections• Downstream of Sediment Build-Up’sDownstream of Sediment Build-Up s• Change of Grade or Direction• Combinations of Above• Areas with History of High AtmosphericAreas with History of High Atmospheric

H2S Concentrations

Examples of DeteriorationExamples of DeteriorationExamples of DeteriorationExamples of Deterioration

Scaling and Turbulent Flow Utica Road and M-59


PCI-11A Severe Scaling, Reinforcement ProjectingM-59 between Utica Road and Mound Road


Hole Size – 2.5’ x 1+’

Lining ProjectsLining Projects

I t ti f 14 Mil R d

Evergreen-Farmington Sewage Disposal System

• Intersection of 14 Mile Road and Middlebelt Road

January 2007– January 2007• $300,000 Initial Repair• $225,000 Downstream Sewer

Lining and Manhole Rehabilitation

– 2008• 694 L F of 36” diameter CIPP• 694 L.F. of 36 diameter CIPP• Rehab 7 MHs• Cost $251,630

Lining ProjectsLining Projects

I t ti f W lt

Clinton Oakland Sewage Disposal System

• Intersection of Walton Boulevard and Old Telegraph RoadRoad– 2007

• 388 L F of 54” diameter CIPP• 388 L.F. of 54 diameter CIPP• Rehab 2 MHs• Cost $319,316

– 2010• 2,000 L.F. of 48” diameter CIPP• Bid Amount $588,510

Lining ProjectsLining ProjectsHuron Rouge Sewage Disposal System

Northville• 2008

– 126 L.F. of 30” diameter CIPP– 300 L.F. of 36” diameter CIPP

443 L F of 42” diameter CIPP– 443 L.F. of 42 diameter CIPP– Rehab 8 MHs– Cost $280 830Cost $280,830

Lining ProjectsLining ProjectsEvergreen Farmington Sewage Disposal System

Franklin / Bingham Farms• East of Telegraph Road,

b t 12 d 14 Mil R dbetween 12 and 14 Mile Roads– 2010

405 L F f 10” di t CIPP• 405 L.F. of 10” diameter CIPP• 1,900 L.F. of 12” diameter CIPP• 1 325 L F of 15” diameter CIPP1,325 L.F. of 15 diameter CIPP• Bid Amount $257,286

Mitigation and MonitoringMitigation and Monitoring

Commerce Township

• DynamOx Trial (May 2006) DynamOx is a machine thatDynamOx is a machine that super oxygenates carrier water, which is delivered to ,the sewage stream to create an aerobic environment in which hydrogen sulfide will not be produced.

Mitigation and MonitoringMitigation and Monitoring

Commerce Township• Totalox by Carrus Chemical (September

2006) Totalox is a mixture of calcium2006) Totalox is a mixture of calcium nitrate and sodium permanganate. The sodium permanganate kills some of thesodium permanganate kills some of the bugs that produce hydrogen sulfide. The calcium nitrate provides an electroncalcium nitrate provides an electron acceptor for the bugs that take over that don’t produce hydrogen sulfidedon t produce hydrogen sulfide.

Mitigation and MonitoringMitigation and MonitoringCommerce Township• Vortex Flow Insert (In use March 2010)

This product spins the sewage through a vortex device as the sewage falls toa vortex device as the sewage falls to the bottom of the manhole. The device prevents turbulent release of the hydrogen sulfide and dissolves oxygenhydrogen sulfide and dissolves oxygen into the sewage as travels through the vortex to oxidize existing hydrogen sulfide and prevent further generationsulfide and prevent further generation. We are still in the process of reviewing the test results for a report to the MDNRE on the effectiveness of theMDNRE on the effectiveness of the Vortex Flow Insert.

Overview of Oakland Macomb Overview of Oakland Macomb Interceptor Drain (OMID) SystemInterceptor Drain (OMID) System

• Approximately 21.3 Miles in Length• Pipe Sizes Range from 3’ to 12’-9” in Diameterp g• Depths up 110’• Serves over 832,000 Residents in 24Serves over 832,000 Residents in 24

Communities in Oakland and Macomb Counties• History of Ownershipy p

Comprehensive Condition Assessment Study Undertaken

Fi di th l t t H d S lfid• Findings as they relate to Hydrogen Sulfide Problems

Identified Areas of Corrosion Photos– Identified Areas of Corrosion - Photos– Magnitude of Problem

Recommendations for Rehabilitation– Recommendations for Rehabilitation

Spalling Concretep g

Exposed / Projecting Aggregatep j g gg g

Missing Aggregateg gg g

Reinforcing Steel Projecting Reinforced Concrete Pipe at Meter ConnectionReinforced Concrete Pipe at Meter Connection

Severe Scaling, Reinforcement Projecting M-59 between Utica Road and Mound RoadM-59 between Utica Road and Mound Road

Projecting Reinforcing Steel - South of Existing C id G t (15 Mil R d)Corridor Gate (15 Mile Road)

Projecting Reinforcing Steel ITC Corridor at 10 Mile RdITC Corridor at 10 Mile Rd

OMID Corrosion Control and OMID Corrosion Control and Identification StudyIdentification StudyGOALSGOALS:• Determine Source of Hydrogen Sulfide

Generation in SystemGeneration in System• Identify Locations of Hydrogen Sulfide Release

C id S lfid C t l St t i i C t• Consider Sulfide Control Strategies in Concert with Rehabilitation Priorities

Proposed Approach to StudyProposed Approach to Study

• Conduct Screening-Level Sampling to Determine Vi bl S l L iViable Sample Locations

• Determine Final Sampling LocationsD l D t il d M it i Pl• Develop Detailed Monitoring Plan

• Collect Field Samples and Conduct Analysis of Wastewater Samples (Dissolved sulfide total sulfideWastewater Samples (Dissolved sulfide, total sulfide, pH, temperature and oxidation-reduction potential)

• Headspace H2S Monitoringp 2 g• Pipe Wall pH• Air Pressure

Proposed Approach to Study Proposed Approach to Study (Continued)(Continued)

C d t S lfid d C i M d li• Conduct Sulfide and Corrosion Modeling• Evaluate and Recommend Corrosion Control

StrategiesStrategies– Sulfide Control Options

Turbulence Reduction– Turbulence Reduction– Ventilation

Corrosion Barriers– Corrosion Barriers

Questions?Questions?Questions?Questions?

h // k /h // k /http://www.oakgov.com/waterhttp://www.oakgov.com/water

OCWRC Hydrogen Sulfide Problems-20100908-430pm

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