One possible solution is to replace treated lumber with wood plastic composites (WPC) as foundation elements.
一种可能的解决办法是，以木塑复合材料(WPC)取代木质板材作为地基元素。
The EPA says there is no need to worry about existing retaining walls, because there is no evidence that pressure treated lumber poses any significant risk.
环保局说，没有必要担心现有的护土墙，因为没有这种压力处理的木材构成重大威胁的证据。
Materials include treated deck lumber, redwood, cedar and man-made or plastic lumber.
材料包括处理木材甲板，红木，雪松和人为的或塑料的木材。
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