o the entire scrap is clean immediately if conditions allow, in case of only allowing specified must be poured into the collapse not to indiscriminately. o for wastewater do the trench system to escape quickly, avoid stagnant, congestion contaminate the area. o When construction is finished, then proceed to clean toilet clean, neat place to rule when constructing the following work without obstacles and ensure hygiene.The excess and waste materials after the examination if no longer used, handled the cancellation guarantee for the market.
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