Manhole Rehabilitation & Corrosion/Odor ControlAdvanced 35 min read

Manhole Rehabilitation & Corrosion/Odor Control: Advanced Rehabilitation & Odor Management II - Odor Control Program Design & Asset Management

Class 4 coverage of comprehensive odor control program design (source control vs. treatment), air quality/nuisance regulation awareness, NASSCO MACP-based manhole condition assessment, and cost-benefit analysis of rehabilitation methods.

Knowing why a manhole corrodes is only half of Class 4 practice. The other half is running a program: deciding system-wide where to spend prevention dollars versus treatment dollars, staying inside the regulatory lines while doing it, systematically grading hundreds or thousands of manholes so rehabilitation money goes to the right ones first, and being able to defend a rehabilitation method choice in cost-benefit terms to a utility board.

Designing a Comprehensive Odor Control Program

Every odor and corrosion control tool covered earlier in this topic falls into one of two categories, and a mature program deliberately uses both.

Source control reduces or prevents

H_2S

generation before it happens: force main sizing and routing that limits detention time, aeration or pure-oxygen injection into force mains to maintain aerobic conditions and suppress sulfate-reducing bacteria,

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