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Re: pvc_sewage_pipes_and_soil_quality



APECSY apecsy wrote:
> 
> The commune of Yoff, which is a part of the capital city of Dakar, Senegal, has
> a serious sewage disposal problem, a rapidly growing population, which is now en
> gaged and will in future be more engaged in urban agriculture.
> 
> In the absence of a sewage system (only septic tanks) the cheapest solution is t
> o install narrow guage polyvinal choride sewage pipes, with the eventual intenti
> on of pumping the sewage to unbuilt land by the airport where it might be treate
> d and used in growing food.
> 
> Does anyone know whether, over the long term, these pipes degrade in a way
> that releases PCB's into the soil? Is PCV dangerous only when it is incinerated?
> The town is built on sandy soil along a fishing beach.  Almost sweet groundwater
>  is less then 15 feet below the surface very near the beach.
> 
> Marian Zeitlin, for the Yoff EcoCommunity Program
> --
> APECSY apecsy
> E-Mail: apecsy@yoff.yoff.sn
> 
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Polyvinyl chloride cannot be chemically transformed into or degraded to
polychlorinated biphenyl.

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