b'ENVIOMETC biodegradabilityENVIOMETC chelating agents are readily biodegradable in accordance with OECD301B test protocols:Extensive (80%) mineralization to CO 2 after 28d;10-60% degradation was 5 days for US sludge and 9 days for EU sludge (i.e. within 10dwindow).ENVIOMETCBiodegradability Testing[1]Modified Sturm Test (OECD 301B)100 Mineralisation ofENVIOMETC in anunacclimatised CO 280 production Sturm test(% of theory) Released CO60 After 28 days, the degree ofdegradation was in therange of 85-95%40A lag phase of 3-5 days2 occurred before the20 degradation started0 0 10 20 30Time (days)When released into the environment, ENVIOMETC chelating agents will rapidly biodegrade reducing the possibility to form persistent organic chelates with heavy metals such as lead (Pb). This will result in less risk in soil accumulation and underground water pollution.'