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Borehole Sanitary Seal Query

Dear Sir/Madam,

First time using this service.

I am looking to establish best practice in placing a sanitary seal to prevent shallow groundwater intrusion into a water supply borehole. The borholes are manual drilled.

Specifically looking at: • Mix ratios for cementitous grout • Issues with using aggregate • Requirements for curing • Placement below water table • Need for tremie pipe or rodding/compaction Any help would be appreciated.

Kiran

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Hi The EinEmergencies hand book and on p597 to 600/601. also p240 to 251 including Fig 10.28, should help.

regards Pauline

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