I have experience in analysis of the result of al alternative sand treatment that takes place every summer nearby Lisbon (Cascais). Iodine spray. Results are negative every time treatment occurs, treatment takes place at the minimum inhibitory concentration levels and is applied once every two to three weeks to maintain low bacterial count.
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Does anyone know of any references/reports pertaining to chlorine injection of beach sand (for E. coli removal)? This suggestion has been brought forward as a means to reduce the E. coli levels in ground and ankle depth water at a particular beach here in Ontario. I am assuming, if this were practical, once injection ceased an instant recolonization of E.coli would occur......I have also suggested to the party that E. coli is the indicator only - I'm not sure if pathogens are affected by chlorine the same way as E. coli?? There are obvious "cons" to this (impact to fish and wildlife etc), however, any successful scenarios would be most helpful.
Jacqui Milne B.Sc.