the streets frisco area in quezon city have been torn apart for the installation of replacement ecofriendly and new corrosion free pvc pipes. the concept is excellent, however, the dust, sand and debris of the excavations create a new problem which foreseeably clog the storm drains up in the next few months. if the excavations are not to be covered yet, it would be nice to contain the loose material so as not to get washed off and accumulate in the storm drain system.