Marvin F. Glotfelty, RG, discusses the availability and quality of silica sand for water well filter packs in the United States. Glotfelty says both have improved in recent years according to his vantage point.
Marvin F. Glotfelty, RG, discusses the availability and quality of silica sand for water well filter packs in the United States. Glotfelty says both have improved in recent years according to his vantage point.
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