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a complete program would be required for certification(EN 13432-OK COMPOST/OWS Lab):
A, Heavy metals + IR: Duration: 1-2 weeks
B, Biodegradation: Duration: 45 days.
Testing can be extended at extra cost if needed
C, Disintegration + compost production for plant toxicity testing: Duration: 12 weeks
D, Plant toxicity: Duration: 3-4 weeks