Case Study

Commander Solves Neighborhood H2S

A West Coast city was experiencing excessive maintenance costs and risk of SSOs due to local restaurants emitting grease into the sewer line. The 6″ line required regular jetting and the risk of SSO was imminent. Looking for a way to lower maintenance costs, the city engaged Helix Labs to install a Minimizer system to do so.

Baseline H2S vapor readings were recorded and are represented by the green lines on the left of the graph. At the beginning of treatment, the line was scoured while being jetted, and 5 gallons of Commander was added to the solution at the furthest upstream manhole. The red Odalog line spikes show the result of the line being scoured.


The main was dosed at 1 quart per day in each manhole (total 3 quarts; red line on odalog graph) and maintained H2S vapor levels less than 2 PPM. Dosing was then fine-tuned and backed off to 2 quarts per day (aqua colored line on odalog graph), and then 1 quart per day (blue line on odalog graph).


A dose level of 1 quart per day met the needs of the city and provided them with a cost-effective solution that kept the phone from ringing, all while costing less than the replacement of carbon filters. 

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