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Granular backfilling around Manhole
Is it possible to use granular backfilling around Manhole up to the level of ground water table? Manhole invert level is -9.0 m and depth to invert level is 15 meters. if possible, what are the requirements?
Is it possible to use granular backfilling around Manhole up to the level of ground water table? Manhole invert level is -9.0 m and depth to invert level is 15 meters. if possible, what are the requirements?
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