Maintaining Environmental Compliance 19.04.2017 An international quarrying company was at serious risk of breaching its consent to discharge at a particular site, thereby compromising its ISO14001 Environmental Quality Assurance accreditation. Despite having substantial recent, purpose-built, settlement capacity for dirty water, winter operating conditions were causing problems with suspended solids, specifically with non-settling fines. SNF, already supporting other sites in this company on dirty water and sludge matters, was invited to investigate the problem and to come up with a solution. Site testwork was carried out. One-step treatment did not adequately deal withthe non-settling fines. A suitable two-step treatment process, ensuring proper flocculation and settlement of the fines, w

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